EP2479480B1 - Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse - Google Patents

Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse Download PDF

Info

Publication number
EP2479480B1
EP2479480B1 EP10817291.7A EP10817291A EP2479480B1 EP 2479480 B1 EP2479480 B1 EP 2479480B1 EP 10817291 A EP10817291 A EP 10817291A EP 2479480 B1 EP2479480 B1 EP 2479480B1
Authority
EP
European Patent Office
Prior art keywords
light source
plate
housing
source device
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10817291.7A
Other languages
German (de)
English (en)
Other versions
EP2479480A1 (fr
EP2479480A4 (fr
Inventor
Eiichi Sato
Hiroyasu Sato
Ken Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Opto Design Inc
Original Assignee
Opto Design Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Opto Design Inc filed Critical Opto Design Inc
Publication of EP2479480A1 publication Critical patent/EP2479480A1/fr
Publication of EP2479480A4 publication Critical patent/EP2479480A4/fr
Application granted granted Critical
Publication of EP2479480B1 publication Critical patent/EP2479480B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array
    • F21Y2105/16—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array square or rectangular, e.g. for light panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the present invention relates to a light source device and a surface illuminating device using same light source device, and more in detail, to a light source device that can emit substantially uniform illumination light while using a point light source having high directionality as a light source, and surface illuminating device using same light source device.
  • a illuminating device using a point light source having high directionality such as a light-emitting diode (hereinafter called LED) or a laser diode (hereinafter called LD), has been developed and is beginning to be used in a display device and the like.
  • the LED has excellent features such as being more power-saving, longer-lived, and smaller than other illuminating devices such as the incandescent light bulbs and the fluorescent lamps.
  • the LED however, has drawbacks such as having an extremely small illumination area due to high directionality, and giving damage to eyes looking directly at the light emitted from the LED.
  • JP 2004 006317 A (see paragraphs [0020] to [0026], and Fig. 1 ) listed below describes a surface light-emitting device that enables to provide surface light by mounting, on an LED, light control means that controls light emitted from the LED.
  • This surface light-emitting device includes: LEDs; a rectangular solid-shaped case that houses the LEDs; light control means mounted on an external surface of a lens of each of the LEDs; and a diffusion panel that covers an opening of the case.
  • the case is structured as follows: a reflector is arranged in the case; the plurality of LEDs are arranged on a bottom of the reflector at predetermined intervals each other; the light control means is mounted on each of the LEDs; and the opening of the case is covered by the diffusion panel.
  • the light control means is composed of a main reflective portion that is located in a position corresponding to the center of the LED, and reflects and transmits the light emitted from the LED at a greater reflection amount than a transmission amount, of a reflective/transmissive portion that is located around the main reflective portion and transmits a greater amount of light than that of the main reflective portion, and of a holder portion provided at the main reflective portion.
  • JP 2008 027886 A (see paragraphs [0045] to [0048], and Fig. 1 ) listed below describes a surface lighting light source device, and a surface illuminating device using the surface lighting light source device.
  • This surface lighting light source device is composed of an LED, of a box-shaped casing that has a bottom surface portion provided at a central part thereof with the LED, side face portions arranged in a standing manner from a periphery of the bottom surface portion, and a side defining an opening provided facing the bottom surface portion, and of an optical reflective plate that covers the opening and makes the light from the LED substantially uniform.
  • the surface illuminating device uses a plurality of such surface lighting light source devices which are adjacently connected with each other.
  • JP 2009 110696 A discloses a surface illuminating device in which the adjacently connected portions are provided at sidewall portions thereof with sidewall holes. The sidewall holes are communicated to the opening.
  • JP 2008 027886 A and JP 2009 110696 A are patent applications filed by the applicant of the present application.
  • JP 2009 110696 A discloses a surface lighting unit comprising a bottom part, sidewall parts, and the optical reflector having an opening and spaced apart by a predetermined distance from the bottom part.
  • the opening includes concentric blind slots in the center of the optical reflector, outer concentric arcuate slots, and a plurality of further outer round holes.
  • JP 2005 071733 A discloses a light modulating body which is externally fitted to a tubular light source.
  • This light modulating body is a cylindrical body formed by bonding both side rims of a light modulating sheet having the almost same shape as the light modulating body and a wider width than the tube diameter of the tubular light source to both side rims of a transparent plastic sheet, and has the almost same length as that of the tubular light source.
  • a plurality of through holes the rate of hole area of each of which is not less than 5 % and not more than 50 % and the diameter of which is from 1 mm to 30 mm are formed in the light modulating sheet.
  • the light modulating sheet is disposed on the irradiation side (the side facing a translucent plate) of the tubular light source, and the transparent plastic sheet is disposed on the anti-irradiation side (the side facing a reflecting plate).
  • JP 9 236803 A discloses a shielding plate composed of a transparent or translucent plastic material such as a transparent polyester film which is disposed on the upper side of a box case.
  • a slit pattern is printed on the shielding plate by using a white ink essentially composed of titanium oxide so that the slits are parallel to the longitudinal direction of a light source (fluorescent light).
  • a light scattering plate is disposed on the shielding plate, and a liquid crystal display element is disposed thereon.
  • the slit pattern printed on the shielding plate is formed in such a manner that the pattern is dense near the light source and rough as distanct from the light source.
  • the printed pattern on the shielding plate may be another pattern as far as it shows a dense and rough pattern in which proportion of the light-shielding part increases near the light source, and a dot or lattice pattern can be used.
  • All of the surface light-emitting devices and the surface illuminating devices of JP 2004 006317 A , JP 2008 027886 A and JP 2009 110696 A have a structure in which a plurality of light source devices are closely in contact with each other without a space between the adjacent devices.
  • a plurality of light source devices are closely in contact with each other without a space between the adjacent devices.
  • more of the light source devices are to be installed.
  • the area of the light-emitting surface cannot be increased as much as an increase in cost for the additional installation.
  • the area of the light-emitting surface is at most the total of areas of the light-emitting surfaces of the light source devices thus increased. It can be contrived to arrange the light source devices not in contact with each other but with a predetermined space between the adjacent light source devices. However, in that case, the space is dark, and the dark portion is projected on a diffusion plate. Thus, dark lines or the like appear on the light-emitting surface.
  • the diffusion plate arranged above the light source device must be raised, that is, the distance of the diffusion plate from the light-emitting surface must be increased. As a result, problems arise such that the surface Illuminating device becomes tall.
  • the light source device using the LED has advantages such as being power-saving, long-lived, and small-sized thanks to the features of the LED in recent years. Examples of applications of such a light source device are therefore not limited to the use cases as described above in JP 2004 006317 A , JP 2008 027886 A and JP 2009 110696 A but also may include these devices embedded in an automatic vending machine or a large-size game machine. However, when embedded without any special consideration, the light source device provides only a limited illumination area because it has the light-emitting surface only on one face, that is, only on the top face. Thus, such a light source device cannot be used when a peripheral area needs to be illuminated.
  • the methods include: to degrade the quality of the LED and/or the reflective plate, to stop using the diffusion plate, and to reduce the size of the illumination surface, for example.
  • degrading the quality of the LED leads to an increase in failure rate, or a failure in obtaining uniform light emission. Therefore, the life as a illuminating device is shortened and a variation in brightness of the illumination light increases. Degrading the quality of the reflective plate leads to occurrence of disadvantages, such as difficulty in obtaining uniform illumination light due to insufficient reflection, and darkening of the illumination light.
  • the reflective plate If the reflective plate is not used, it is also difficult to obtain uniform illumination light, in the same manner as in the case of degrading quality of the reflective plate. Though reducing the size of the illumination surface leads to a cost reduction, it becomes impossible to illuminate an intended area. In this case, such illuminating device does not fulfill its role.
  • a light source device includes: a point light source having high directionality; a housing that has a housing bottom plate arranged with the point light source, housing side plates arranged in a standing manner from a periphery of the housing bottom plate to a predetermined height, and a side defining an opening provided facing the housing bottom plate, and that is formed on inner wall surfaces thereof with reflective surfaces; and an optical reflective plate that covers the opening and emits light from the point light source as substantially uniform illumination light, each of at least some of the housing side plates being provided with a side central reflective portion having a high optical reflectance and a low optical transmittance in a side plate region nearest to the point light source, and provided, in outer side plate regions of the side central reflective portion, with side outer reflective portions that have an optical reflectance decreasing and an optical transmittance increasing as being distant from the side central reflective portion.
  • the housing bottom plate have a rectangular shape, and at least one of the housing side plates arranged in a standing manner from the periphery of the rectangular shape be provided with the side central reflective portion and the side outer reflective portions.
  • the side central reflective portion be provided with grooves formed by half-cutting the housing side plate or with fine holes, and the side outer reflective portions be provided with through-holes that penetrate the housing side plate and have a predetermined opening area,
  • the point light source be a light-emitting diode or a laser diode.
  • a surface illuminating device is defined by claim 5. It includes one or more of the light source devices, a container case that is provided with an opening and a size capable of containing one or more of the light source devices, and a diffusion plate that covers the opening.
  • the container case is a box body including a case bottom plate that has a larger area than a total of bottom areas of the contained number of the light source devices, case side plates that are arranged in a standing manner from a periphery of the case bottom plate to a height larger than that of the housing side plates of the light source device, and a side defining the opening provided facing the case bottom plate, with inner wall surfaces of the box body formed with reflective surfaces.
  • the light source device is arranged in the container case with a clearance (Dl) that allows the illumination light to pass between the inner wall surface and the light source device.
  • the case side plates be inclined outward at 90° to 150° from a flat surface of the case bottom plate.
  • the container case contain the plurality of light source devices with adjacent light source devices being arranged with a predetermined clearance (D2) between each other, and the diffusion plate be arranged with a predetermined clearance (D3) from the optical reflective plate of each of the plurality of light source devices.
  • the clearance (D2) be a half or more of a maximum distance (W) between opposed side plates of the light source device
  • the clearance (Dl) be a half or more of the clearance (D2)
  • the clearance (D3) be a half or less of the distance (D2) .
  • the disclosure also relates to a surface illuminating device according to a third aspect (not part of the present invention) that includes a point light source, light source devices each of which has a box-shaped housing provided with a housing bottom plate whose inner surface side on which the point light source is fixed is reflective, with housing side plates that are arranged in a standing manner from a periphery of the housing bottom plate to a predetermined height and are reflective on the inner and outer surface sides thereof, with a side defining an opening provided facing the housing bottom plate, and with an optical reflective plate that covers the opening of the housing, and that reflects and transmits light from the point light source; a container case with an opening that is reflective on the inner surface side thereof and contains the plurality of light source device; and a diffusion plate that covers the opening of the container case.
  • Adjacent light source devices among the light source devices are arranged with a predetermined clearance (D2) between each other, and the diffusion plate is arranged with a predetermined clearance (D3) from each of the optical reflective plates of the plurality
  • the predetermined clearance (D2) be a half or less of a maximum distance (W) between opposed side plates of the light source devices.
  • the predetermined clearance (D3) be a half or more of the predetermined clearance (D2).
  • the housing side plate may be provided with an opening that allows part of light to be transmitted.
  • the optical reflective plate have a transmittance increasing and a reflectance decreasing as a distance increases from the point light source.
  • the housing and the optical reflective plate include ultrafinely foamed optical reflective members.
  • the housing have any one of a rectangular shape, a triangular shape, a circular shape, and a honeycomb shape in a plan view.
  • the container case have a similar shape to the housing.
  • the light from the point light source can be emitted not only from the surface of the optical reflective plate but also from the surface of the housing side plate substantially uniformly.
  • the light-emitting surface becomes multifaceted and the light emission area increases.
  • the light source device can be used in the surface illuminating device so as to enlarge the illumination area, and can also be embedded in equipment such as an automatic vending machine or a large-size game machine without any special consideration so as to enlarge the illumination area.
  • the side central reflective portion is provided with grooves formed by half-cutting the side plate or with fine holes, and the side outer reflective portion is provided with through-holes that penetrate the side plate and have a predetermined opening area. Therefore, the side central reflective portion and the side outer reflective portions can be produced easily.
  • the light source device of the first aspect of the present invention can provide uniform illumination light even with the point light source having high directionality, such as an LED or an LD, eliminating the possibility of leaving a bright spot at a central part or darkening a part directly above the point light source.
  • the point light source having high directionality such as an LED or an LD
  • the respective effects of the light source device according to the above descriptions can be provided, and in addition, by arranging the plurality of light source devices, it is possible to obtain a surface illuminating device that can achieve illumination light having a uniform illuminance distribution covering a wider area.
  • the case side plates are inclined outward. Therefore, the area of the case opening is larger than that of the case bottom plate, and in addition, the light radiated from the side of the light source device can be efficiently reflected toward the case opening.
  • the light source devices are not arranged adjacent to each other in the container case. Therefore, it is possible to obtain uniform Illumination light over a large screen while minimizing a reduction in luminance by using a smaller number of the point light sources.
  • the light source devices are not arranged adjacent to each other in the container case. Therefore, it is possible to obtain uniform illumination light over a large screen while minimizing a reduction in luminance.
  • the surface illuminating device of the third aspect it is possible to appropriately determine a distance between the light source devices and a clearance between the optical reflective plate and the diffusion member.
  • the housing bottom plate, the housing side plates, and the optical reflective plate that are made of the same material. Using these plates of the same material makes production of them easy because the housing can be formed of a single material.
  • Embodiments of the present invention will be described below. It should be noted that the embodiments presented below are for exemplifying a light source device and a surface illuminating device using same light source device for realizing the technological concept of the present invention, and are not intended to limit the present invention to those devices exemplified below, but the present invention can be equally applied to other embodiments included in the scope of the claims.
  • Fig. 1 is an exploded perspective view of the light source device according to the first embodiment of the present invention.
  • the light source device 1 is composed of a point light source 2, a box-shaped housing 3 that is provided, at a bottom plate thereof, with the point light source and is open at top, and an optical reflective plate 4 that covers the opening of the housing and reflects and transmits light from the point light source 2.
  • a single piece of LED or an LED assembly of a plurality of LED elements (these are hereinafter collectively called LED), or an LD is used.
  • the LED may be not only in one of the three primary colors R, G, and B, but also in another color.
  • the LED or the LD may be equipped with a lens. In the present embodiment, examples using the LED will be described.
  • the housing 3 has a box shape that includes a housing bottom plate 3a to substantially central part of which an LED 2 is fixed, housing side plates 3b to 3e that are arranged in a standing manner from a periphery of the housing bottom plate to a predetermined height, and a side defining an opening 3f provided facing the housing bottom plate.
  • Inner wall surfaces of the housing 3 are formed with reflective surfaces.
  • External wall surfaces of the housing side plates 3b to 3e are preferable to be also formed with reflective surfaces.
  • the housing 3 is formed of a reflective plate material, such as an ultrafinely foamed optical reflective plate, that has a high optical reflectance, a low optical transmittance, and a low optical absorptance.
  • a type of the ultrafinely foamed optical reflective plate material having an optical reflectance of 98%, an optical transmittance of 1%, and an optical absorptance of 1% is available, and preferable to be used.
  • the material to be used for the housing is obviously not limited to this material.
  • a transparent substrate on which reflective material is coated or printed may be used. Such a material is formed, for example, by coating or screen-printing an emulsion of fine particles of titanium white or an emulsion of fine particles of polytetrafluoroethylene.
  • the housing bottom plate 3a has a substantially square shape with a side length of L1 (for example, 200 mm), and formed, at the substantially central part thereof, with an exposing hole that exposes a light-emitting part of the LED 2.
  • the LED 2 is fixed to a mounting board (not illustrated), which in turn is arranged on the backside of the bottom plate so as to expose the light-emitting part of the LED through the exposing hole.
  • the housing side plates 3b to 3e are formed of vertical plates that are arranged in a standing manner from the periphery of the substantially square-shaped bottom plate 3a to a predetermined height of h1 (for example, 15 mm). That is, side plates 3b to 3e are formed of four vertical plates.
  • the housing side plates stand vertically, they may be inclined outward at a predetermined angle from the periphery of the housing bottom plate 3a.
  • the inclination angle is preferably approximately more than 90° and not more than 150° between the side plate and a flat surface of the housing bottom plate 3a. With the inclination, the opening can be enlarged, and the LED light can be efficiently emitted to the opening side by using the inclined surfaces.
  • All, one, or some of the four housing side plates 3b to 3e are each provided thereon with an optical reflective portion that emits the LED light to an outer surface side of the housing side plate substantially uniformly. A structure of the optical reflective portion will be described later.
  • Fig. 2 illustrates the optical reflective plates constituting the light source device of Fig. 1 , with Fig. 2A being a top view, and Fig. 2B being a top view of a variation of the optical reflective plate.
  • the optical reflective plate 4 is formed of a square plate-shaped body that closes the opening 3f of the housing 3.
  • the optical reflective plate 4 is formed of the square plate-shaped body that has a predetermined thickness and identical side lengths of L1. That is, opposed sides 4a and 4b have the same length as that of 4c and 4d.
  • the optical reflective plate 4 is provided with a central reflective portion 5A at a central part of the plate, and an outer reflective portion 5B around the outer perimeter of the central reflective portion, and is formed of a reflective plate, such as an ultrafinely foamed optical reflective plate material, that has a high optical reflectance, a low optical transmittance, and a low optical absorptance.
  • a type of the ultrafinely foamed optical reflective plate material having an optical reflectance of 98%, an optical transmittance of 1%, and an optical absorptance of 1% is available, and preferable to be used.
  • the central reflective portion 5A is located directly above the LED 2 when the optical reflective plate 4 is mounted at the opening 3f of the housing 3, and is composed of a central reflecting area 5a that has a small area and faces a vertically top portion of the light-emitting part of the LED, and of a pericentral reflecting area 5b that has a slightly enlarged area and is located at a predetermined distance apart from the central reflecting area 5a. Because of light distribution characteristics thereof, the LED 2 irradiates the strongest light to the central reflecting area 5a, and second strongest light to the pericentral reflecting area 5b.
  • the central reflecting area 5a is adjusted to have the highest optical reflectance and the lowest optical transmittance
  • the pericentral reflecting area 5b is adjusted to have a slightly lower optical reflectance and a slightly higher optical transmittance than those of the central reflecting area 5a. Because the central reflecting area 5a has the highest reflectance and the lowest optical transmittance, this area can be prevented from producing a high-luminance illumination spot while not being darkened.
  • the optical reflectance and the optical transmittance are adjusted by processing the reflective plate.
  • the optical reflectance and the optical transmittance are adjusted by applying processing such as providing a fine groove group composed of a plurality of fine grooves (longitudinal grooves, transverse grooves, and ring-shaped grooves) on the reflective plate material, or adjusting the plate thickness.
  • the optical reflectance and the optical transmittance are adjusted by providing, for example, a fine hole group composed of a plurality of fine holes (through-holes having a diameter of, for example, 1.0 mm or less).
  • the outer reflective portion 5B is provided with a plurality of through-holes 51 to 53 that have opening areas different from each other and are arranged with predetermined regularity from the pericentral reflecting area 5b toward the sides 4a to 4d.
  • openings of the through-holes 51 to 53 the through-hole 51 located nearest to the pericentral reflecting area has the smallest opening area, and the opening area increases in the order of the through-holes 52 and 53 as the through-hole departs from the pericentral reflecting area.
  • the through-holes having these openings are formed at places where parallel lines in parallel with the side 4a and vertical lines in parallel with the side 4b perpendicular to the side 4a intersect with each other. That is, the openings of these through-holes are arranged with regularity at even intervals in an orthogonal grid pattern.
  • This optical reflective plate 4 had at four corners thereof through-holes each having a predetermined opening. However, it was found that, if the corner portions have the openings, the surface illuminating device is slightly dark at places corresponding to the corner portions when the light source device is embedded in the surface illuminating device described later. Therefore, an optical reflective plate 4A is provided with no openings in the predetermined areas at corner portions 6, as illustrated in Fig. 2B . By not providing the openings at the corner portions, more amount of reflected light is emitted from the optical reflective portions of the side plates corresponding to the corner portions. Thus, the above-described disadvantage is eliminated.
  • the ultrafinely foamed optical reflective plate material has been exemplified as raw material of the optical reflective plate, the raw material is not limited to this material. Instead, a transparent substrate may be used on which reflective material is coated or printed except at the opening portions described above. Such a material is formed, for example, by coating or screen-printing an emulsion of fine particles of titanium white or an emulsion of fine particles of polytetrafluoroethylene.
  • Fig. 3 illustrates the optical reflective portion of the side plate constituting the light source device of Fig. 1 , with Fig. 3A being one side view of Fig. 1 , and Figs. 3B to 3D being side views of respective variations of the optical reflective portion.
  • the optical reflective portion 7A is composed of a side central reflective portion 7a that faces the LED 2 and is provided in an area nearest to the LED, and of a side outer reflective portion 7b that is provided in an area extended in the longitudinal direction from the side central reflective portion.
  • the side central reflective portion 7a is provided with a plurality of fine holes so as to have a low optical transmittance while reflecting the outgoing light from the LED at a high optical reflectance.
  • the side outer reflective portion 7b is provided with through-holes each of which has an opening that gradually reduces the optical reflectance and increases the optical transmittance as the through-hole departs from the side central reflective portion 7a.
  • the fine holes and the through-holes are formed using substantially the same methods as those for the central reflective portion 5A and the outer reflective portion 5B of the optical reflective plate 4.
  • the optical reflective portion 7A may be rougher than and not so elaborate as the optical reflective plate 4. This is because the light irradiated to the housing side plate is weaker than that directly above the LED due to the light distribution characteristics of the LED 2.
  • the optical reflective portion is not limited to the optical reflective portion 7A, but may be changed variously.
  • a side central reflective portion 7a1 and a side outer reflective portion 7b1 are provided with slits, each of which is changed in area so as to give a predetermined opening ratio (refer to Fig. 3B ).
  • An optical reflective portion 7C is structured to be provided with no slit at a side central reflective portion 7a2, but is provided with a relatively long slit with an opening area thereof enlarged in the longitudinal direction at a side outer reflective portion 7b2 (refer to Fig. 3C ).
  • An optical reflective portion 7D is structured to be provided with no notch at a side central reflective portion 7a3, but is provided with a notch that is wider as it goes outward in the longitudinal direction at a side outer reflective portion 7b3 (refer to Fig. 3C ).
  • the optical reflective portion is provided on each of the four housing side plates 3b to 3e.
  • the optical reflective portion need not be provided on every one of the side plates, but may be provided on one or several of the side plates depending on the necessity of illumination light from the side faces.
  • the optical reflective portion is provided with the through-holes, the slits, and the notch that have the predetermined openings. Because these openings penetrate the side plate, dust or the like may enter from these portions depending on the use environment. In such a use environment, it is preferable to use a transparent substrate for the housing side plate, and to structure the side plate by coating or printing the reflective material on the substrate.
  • the light source device 1 can emit the light from the LED 2 not only through the surface of the optical reflective plate 4 but also through the surfaces of the side plates of the housing 3 substantially uniformly, the light source device 1 can be used by being embedded not only in the surface illuminating device to be described later but also in an automatic vending machine or a large-size game machine.
  • Fig. 4 is a schematic top view of the surface illuminating device according to the second embodiment of the present invention
  • Fig. 5 is a cross-sectional view obtained by cutting along a line V-V of Fig. 4 .
  • Fig. 4 illustrates the surface illuminating device with a diffusion plate removed so that the inside can be seen.
  • a surface illuminating device 8 includes four light source devices 1, a container case 9 that contains the light source devices, and a diffusion plate 10 that closes an opening of the container case and diffuses outgoing light from the light source devices.
  • the surface illuminating device 8 is structured such that the four light source devices 1 are arranged in the container case 9 with a predetermined clearance (distance) between each other, and the opening of the container case 9 is covered with the diffusion plate 10.
  • the container case 9 includes a case bottom plate 9a that has a larger area than a total area obtained by summing a bottom area of each of the light source devices 1, case side plates 9b to 9e that are arranged in a standing manner from a periphery of the case bottom plate, and a side defining an opening 9f provided facing the case bottom plate. Inner wall surfaces of the container case 9 are formed with reflective surfaces.
  • the case bottom plate 9a has a larger area than a total area obtained by summing a bottom plate area of each of four housings 3 constituting the light source devices 1.
  • the length of a side of the case bottom plate 9a is greater than a total length obtained by summing the length L1 in the longitudinal direction of each of the housing side plates.
  • a height h3 of the case side plate is greater than the height h1 of the housing side plate, as illustrated in Fig. 5 .
  • the height h2 is denoted as a clearance D3 between the diffusion plate and the optical reflective plate of the light source device.
  • the surface illuminating device 8 is embedded as follows: In the container case 9, the four light source devices 1 are arranged with a predetermined clearance (distance) G1 between adjacent devices and with a clearance (distance) G2 between the device and the case side plate, and then, the opening 9f is covered with the diffusion plate 10, which is then fixed.
  • G1 is denoted as a clearance D2 between the light source devices
  • G2 is denoted as a clearance D1 that allows the illumination light to be emitted between the inner wall surfaces and the light source devices.
  • the clearance (distance) h2 is formed between a light-emitting surface of each of the light source devices 1 and the diffusion plate 10.
  • the relationships among the distances G1, G2, and h2 are important for obtaining uniform illumination light from an outer surface of the diffusion plate 10. That is, increasing the distances G1 and G2 darkens the area between the adjacent light source devices 1 and the area between the case side plate of the container case 9 and the light source devices 1, and increasing the height h2 makes it impossible to obtain a desired illuminance.
  • the area of the light-emitting surface can be larger, and the device can be shorter in height than in the above case (a). That is, each of the light source devices 1 emits substantially uniform LED light from the housing side plates 4b to 4e thereof through the optical reflective portions 7, and the emitted light is reflected in the clearance between the adjacent devices and by the inner wall surfaces of the container case 9 and then goes out from the diffusion plate 10. Consequently, the clearances G1 and G2 can be larger than those in the above case (a).
  • G1 can be set to a half or more of the maximum distance W between opposed side plates of the light source device 1 (refer to Fig.
  • G2 can be set to a half or more of G1; and h2 can be set to a half or less of G1.
  • the side plates 9b to 9e of the container case 9 are arranged in a vertically standing manner from the case bottom plate 9a.
  • the side plates may be inclined outward at a predetermined angle from the periphery of the case bottom plate 9a as illustrated by a surface illuminating device 8A (refer to Fig. 6 ).
  • the inclination angle is preferably approximately more than 90° and not more than 150° between the side plate and a flat surface of the case bottom plate 9a. With this inclination, the opening and a diffusion plate 10A are enlarged, and thus, a light emission area is increased.
  • a height h2' can be smaller (h2' ⁇ h2).
  • the side plates of the container case have a flat plate shape, they may be curved toward the inside of the case. In this case, if the inner walls of the container case are formed with reflective surfaces such as mirror surfaces, the light can be radiated more efficiently from the opening of the container case.
  • the side plates can also have a corrugated shape or other shapes instead of the flat plate shape.
  • the surface illuminating devices 8 and 8A of the above-described embodiment are composed of the four light source devices 1.
  • the number of the devices can be changed corresponding to the purpose of use.
  • the surface illuminating device may be structured by containing a single piece of the light source device 1 in a container case 9B for one device like a surface illuminating device 8B (in Fig. 7A ).
  • the surface illuminating devices 8, 8A, and 8B of the above-described embodiment are structured such that the light source device 1 has a substantially square shape, and the container cases 9, 9A, and 9B containing the light source device(s) have a substantially square shape. However, they may have any shape, such as a non-square rectangular shape as illustrated in Fig. 7B .
  • FIG. 7B is a schematic top view of the surface illuminating device.
  • Fig. 8A is a cross-sectional view along a line VIIIA-VIIIA of Fig. 7B
  • Figs. 8B and 8C are side views of optical reflective portions provided on side plates. Note that Fig. 7B illustrates the surface illuminating device with a diffusion plate removed so that the inside can be seen.
  • a surface illuminating device 8C is composed of a light source device 1A having a non-square rectangular shape, a container case 9C that contains the light source device, and a diffusion plate 10B (refer to Fig. 8A ) that covers an opening of the container case.
  • the light source device 1A, the container case 9C, and the diffusion plate 10B are the same in structure as, though different in shape from, the light source device 1, the container case 9, and the diffusion plate 10 of the surface illuminating device 8 described above. Therefore, descriptions thereof will be omitted.
  • the light source device 1A includes a pair of opposed short housing side plates 3b' and 3d' and a pair of opposed long housing side plates 3c' and 3e'. These housing side plates are each provided with an optical reflective portion.
  • the housing side plates 3b' and 3d' and the housing side plates 3c' and 3e' have mutually different approach distances to the LED 2. Therefore, the long housing side plates 3c' and 3e' are each provided with an optical reflective portion 7A' that is composed of a side central reflective portion 7a' and side outer reflective portions 7b'. Because the short housing side plates 3b' and 3d' are farther from the LED 2, no processing is required to form reflective portions such as the side central reflective portion 7a' and the side outer reflective portion 7b'. Instead, an optical reflective portion 7E is provided that is provided with through-holes having the same opening area as each other.
  • FIG. 9 illustrates a light source device and a surface illuminating device using same light source device according to the third embodiment of the present invention, with Fig. 9A being a schematic top view, Fig. 9B being one side view of the surface illuminating device of Fig. 9A, and Fig. 9C being a cross-sectional view along a line IXC-IXC of Fig. 9A .
  • Fig. 10 illustrates a variation of the surface illuminating device of Fig. 9A , with Fig. 10A being a top view, and Fig. 10B being a cross-sectional view along a line XB-XB of Fig. 10A .
  • Figs. 9A and 10A each show the surface illuminating device with a diffusion plate removed so that the inside can be seen.
  • a part of the structure of each of the light source devices 1 and 1A, and the surface illuminating devices 8, 8B, and 8C that use the light source device(s) is changed corresponding to the purpose of use.
  • a surface illuminating device 8D is composed of a light source device 1B, a container case 9D that contains the light source device 1B, and a diffusion plate (not illustrated) that covers an opening of the container case. Note that this surface illuminating device is obtained by cutting the surface illuminating device 8C of Fig. 7B along a line IXA-IXA and by changing a part of the structure thereof.
  • the light source device 1B has four housing side plates 3b1 to 3e1.
  • the housing side plates 3e1, 3b1, and 3d1 of the housing side plates 3b1 to 3e1 are each provided with an optical reflective portion.
  • the housing side plate 3c1 is formed of only a plate body without being provided with an optical reflective portion.
  • the container case 9D includes a case bottom plate 9a, case side plates 9b1 to 9e1 that are arranged in a standing manner from a periphery of the case bottom plate, and a side defining an opening 9f provided facing the case bottom plate. Inner wall surfaces of the container case 9D are formed with reflective surfaces.
  • One side plate 9c1 of the case side plates is provided with a slit 9c1' that allows light from the light source device 1B to pass therethrough.
  • the slit 9cl' is provided with an opening area defined by a length equal to or slightly greater than that of a long side plate of the light source device and by a predetermined width.
  • the illumination light is also irradiated from the slit 9c1'.
  • the surface illuminating device 8D is used by being embedded in, for example, a game machine.
  • the case side plates 9b1 to 9e1 of the container case 9 are arranged in a vertically standing manner from the case bottom plate 9a1.
  • Case side plates 9b1', 9d1', and 9e1' of a container case 9E may be inclined outward at a predetermined angle from the periphery of the case bottom plate 9a1 as illustrated by a surface illuminating device 8E (refer to Figs. 10A and 10B ).
  • the inclination angle is preferably approximately more than 90° and not more than 150° between the side plate and a flat surface of the case bottom plate 9a1. With this inclination, the opening and the diffusion plate 10B are enlarged, and thus, the light emission area is increased.
  • case height h2' can be further decreased (h2' ⁇ h2).
  • the side plate 9c1 is arranged in a vertically standing manner from the case bottom plate 9a1 because the side plate 9c1 is not provided with a reflective portion but provided with the slit 9c1'.
  • FIG. 11 is an external perspective view of a light source device used in a surface illuminating device according to a fourth embodiment of the present invention.
  • a box-shaped housing 3 is provided with a housing bottom plate 3a whose inner surface is formed with a reflective member, provided with housing side plates 3b to 3e that are arranged in a standing manner from a periphery of the housing bottom plate 3a and are formed on the inner and outer surfaces thereof with reflective members, and provided with a side defining an opening provided facing the housing bottom plate 3a.
  • a light source device 1C is composed of the housing 3, a point light source 2 that is fixed to the housing bottom plate 3a, and an optical reflective plate 4 that covers the opening of the housing 3, and reflects and transmits light from the point light source 2.
  • the four housing side plates 3b, 3c, 3d, and 3e are arranged in a vertically standing manner from the housing bottom plate 3a.
  • the light source device 1C has a height of h1, and the housing side plates 3b, 3c, 3d, and 3e have the same length of L1.
  • the housing 3 and the optical reflective plate 4 are each formed of a material, such as an ultrafinely foamed transmissive/reflective member, that has a high optical reflectance, a low optical transmittance, and a low optical absorptance.
  • a type of the ultrafinely foamed transmissive/reflective member having an optical reflectance of 98%, an optical transmittance of 1%, and an optical absorptance of 1% is available.
  • Other usable materials include a material formed by coating or screen-printing an emulsion of fine particles of titanium white or an emulsion of fine particles of polytetrafluoroethylene.
  • a coated film containing fine particles of titanium white or polytetrafluoroethylene is also suitable.
  • an LED or an LED group composed of a plurality of LEDs, or an LD is used as the point light source 2 used in the light source device 1C.
  • the LED and the LD has high directionality, but uniform illumination light can be obtained at the top face by adjusting the transmittance of the optical reflective plate 4. Because the optical reflective plate 4 used in the present fourth embodiment is the same as that used in the first embodiment, descriptions thereof will be omitted.
  • Fig. 12A is a top view of the surface illuminating device according to the fourth embodiment
  • Fig. 12B is a cross-sectional view obtained by cutting along a line XIIB-XIIB of Fig. 12A
  • Fig. 13 is an external perspective view of the surface illuminating device according to the fourth embodiment of the present invention.
  • the light source devices are arranged in the container case 9 with predetermined distances La and Lc between each other.
  • the distances La and Lc have the same value of a half or less of a maximum distance W between opposed side plates of the light source device. A distance of more than this value makes it difficult to obtain uniform illumination light.
  • distances Lb and Ld are provided between the light source devices and container case side faces 9a, 9b, 9c, and 9d.
  • the distances Lb and Ld have the same value of a half of the distances La and Lc. This is because the container case side faces 9a to 9d have no light source and hence illumination from the side faces is not obtained.
  • the light emitted from the outer reflective portion 5B illuminates above the outer part of the light source device and a top surface S of a face where the light source device is not placed.
  • the light from the central reflective portion 5A of the light source device illuminates above the central part of the surface illuminating device. Because the light from the outer reflective portion 5B illuminates the top surface S, the illuminance of the top surface S increases whereas the illuminance above the outer part of the light source device decreases, and thus, the illuminance of the surface illuminating device becomes uniform as a whole.
  • the overall illuminance is further uniformed by providing the diffusion plate 10.
  • the diffusion plate 10 is provided at a predetermined clearance h2 from the optical reflective plate 4.
  • the clearance h2 between the diffusion plate 10 and the optical reflective plate 4 is preferably a half or more of the predetermined distances La and Lc between the light source devices.
  • light is noticeably uneven with the clearance h2 that is a half or less of the predetermined distances La and Lc.
  • optical reflective plate 4 used in the fourth embodiment described above can provide uniform illumination light
  • Fig. 14 is a front view of the optical reflective plate 4' in a light source device (not illustrated) used in a light source device of a fifth embodiment of the present invention.
  • the optical reflective plate 4' has almost the same structure as that of the optical reflective plate 4 in the fourth embodiment, and thus, descriptions of the same parts will be omitted.
  • FIG. 15A is a graph showing a relationship between a distance from the light source and the illuminance in the case in which the optical reflective plate 4 is used
  • Fig. 15B is a graph showing a relationship between the distance from the light source and the illuminance in the case in which the optical reflective plate 4' is used.
  • the size of the opening of light source device 1' of the fifth embodiment is determined so that the illuminance is higher as the distance is longer from the light source.
  • the optical reflective plate 4 which can provide uniform illumination light over the entire light source device, the illumination light hardly reaches the top surface above the place where the light source device 1C is not located. Accordingly, when the diffusion plate 10 is arranged at a near place, the surface illuminating device gives a slightly unevenly distributed illumination as an entire surface illuminating device in which the light source devices 1C are arranged side by side. Therefore, in the fifth embodiment, the optical reflective plate 4' is used that is processed so that the illuminance is higher in the outer part than in the central part.
  • the obtained illumination light can be uniform as that of an entire surface illuminating device even if a single light source device emits uneven illumination light.
  • Fig. 16 is an external perspective view of a light source device 1D in a sixth embodiment
  • Fig. 17 is an external perspective view of a surface illuminating device in which the light source devices 1D in the present embodiment are arranged side by side.
  • sidewall portions 30b, 30c, 30d, and 30e of the light source device 1D are each provided with openings H1, H2, and H3.
  • sidewall portions 90a, 90b, 90c, and 90d of a container case are arranged in a standing manner not vertically but obliquely at an inclination angle of approximately 45 degrees from the vertical direction.
  • the sidewall portions 90a to 90d are each formed of a material, such as an ultrafinely foamed transmissive/reflective member, that has a high optical reflectance, a low optical transmittance, and a low optical absorptance.
  • a type of the ultrafinely foamed transmissive/reflective member having an optical reflectance of 98%, an optical transmittance of 1%, and an optical absorptance of 1% is available.
  • Other materials may be used, such as an emulsion of fine particles of titanium white and an emulsion of fine particles of polytetrafluoroethylene. These materials may be coated or screen-printed on the housing.
  • Part of light is transmitted through the openings H1, H2, and H3, and reflected by the sidewall portions 90a to 90d of the container case. Thereby, a top surface S of a face where the light source device is not placed is illuminated, and thus, more uniform illumination light can be obtained.
  • the housing has a rectangular shape in a plan view.
  • the housing is not necessarily limited to have a rectangular shape, but can have various shapes, such as a triangular shape, a honeycomb shape, and a circular shape, in a plan view as illustrated in Fig. 18.
  • Fig. 18 illustrates top views of light source devices that can be used in surface illuminating devices of variations in the embodiments 4 to 6 of the present invention.
  • a predetermined distances La and Lc between the light source devices are also a half or less of a maximum distance W between opposed side plates of the light source device in the same manner as in the above-described embodiments.
  • a clearance h2 between the diffusion plate and the light source device is also a half or more of the predetermined distances La and Lc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Claims (8)

  1. Dispositif de source de lumière (1, 1A, 1B, 1C, 1D) comprenant :
    une source lumineuse ponctuelle (2) ayant une directionnalité élevée ;
    un logement (3) qui a une plaque inférieure de logement (3a) agencée avec la source lumineuse ponctuelle (2), des plaques latérales de logement (3b-3e) agencées d'une manière dressée à partir d'une périphérie de la plaque inférieure de logement (3a) jusqu'à une hauteur prédéterminée, et un côté définissant une ouverture ménagée face à la plaque inférieure de logement (3a), et qui est formé sur des surfaces de paroi internes de celui-ci avec des surfaces réfléchissantes ; caractérisé par
    une plaque réfléchissante optique (4) qui couvre l'ouverture et émet de la lumière à partir de la source lumineuse ponctuelle (2) sous forme de lumière d'éclairage essentiellement uniforme,
    chacune d'au moins certaines des plaques latérales de logement (3b-3e) étant pourvue d'une partie réfléchissante centrale latérale (7a, 7a1, 7a2, 7a3) ayant une réflectance optique élevée et une faible transmittance optique dans une région de plaque latérale la plus proche de la source lumineuse ponctuelle (2), et pourvue, dans des régions externes de plaque latérale de la partie réfléchissante centrale latérale, de parties réfléchissantes externes latérales (7b, 7b1, 7b2, 7b3) qui présentent une réflectance optique qui diminue et une transmittance optique qui augmente avec la distance par rapport à la partie réfléchissante centrale latérale (7a, 7a1, 7a2, 7a3).
  2. Dispositif de source de lumière selon la revendication 1, dans lequel le logement (3), la plaque inférieure de logement (3a) a une forme rectangulaire, et au moins une des plaques latérales de logement (3b-3e) agencées d'une manière dressée à partir de la périphérie de la forme rectangulaire comporte la partie réfléchissante centrale latérale (7a, 7a1, 7a2, 7a3) et les parties réfléchissantes externes latérales (7b, 7b1, 7b2, 7b3).
  3. Dispositif de source de lumière selon la revendication 1, dans lequel la partie réfléchissante centrale latérale (7a, 7a1, 7a2, 7a3) comporte des rainures formées en coupant à moitié la plaque latérale de logement (3b-3e) ou des trous fins, et les parties réfléchissantes externes latérales (7b, 7b1, 7b2, 7b3) sont pourvues de trous traversants qui pénètrent la plaque latérale de logement et ont une aire d'ouverture prédéterminée.
  4. Dispositif de source de lumière selon l'une quelconque des revendications 1 à 3, dans lequel la source lumineuse ponctuelle (2) est une diode électroluminescente ou une diode laser.
  5. Dispositif d'éclairage de surface comprenant :
    un ou plusieurs des dispositifs de source de lumière (1, 1A, 1B, 1C, 1D) selon l'une quelconque des revendications 1 à 4 ;
    un boîtier réceptacle (9, 9A-9E) qui est pourvu d'une ouverture et d'une taille capable de contenir un ou plusieurs des dispositifs de source de lumière (1, 1A, 1B, 1C, 1D) ; et
    une plaque de diffusion (10, 10A-10C) qui couvre l'ouverture,
    le boîtier réceptacle (9, 9A-9E) étant un corps d'enceinte incluant une plaque inférieure de boîtier (9a) qui a une aire plus grande qu'un total des aires inférieures du nombre contenu des dispositifs de source de lumière (1, 1A, 1B, 1C, 1D), des plaques latérales de boîtier (9b-9e) qui sont agencées d'une manière dressée à partir d'une périphérie de la plaque inférieure de boîtier (9a) jusqu'à une hauteur plus grande que celle des plaques latérales de logement (3b-3e) du dispositif de source de lumière (1, 1A, 1B, 1C, 1D), et un côté définissant l'ouverture fourni face à la plaque inférieure de boîtier (9a), avec des surfaces de paroi internes du corps d'enceinte formées avec des surfaces réfléchissantes, et le dispositif de source de lumière (1, 1A, 1B, 1C, 1D) étant agencé dans le boîtier réceptacle (9, 9A-9E) avec un dégagement (D1) qui permet à la lumière d'éclairage de passer entre la surface de paroi interne et le dispositif de source de lumière (1, 1A, 1B, 1C, 1D).
  6. Dispositif d'éclairage de surface selon la revendication 5, dans lequel les plaques latérales de boîtier (9b-9e) sont inclinées vers l'extérieur à 90° à 150° par rapport à une surface plate de la plaque inférieure de boîtier (9a).
  7. Dispositif d'éclairage de surface selon la revendication 5, dans lequel le boîtier réceptacle (9, 9A-9E) contient la pluralité de dispositifs de source de lumière (1, 1A, 1B, 1C, 1D) avec des dispositifs de source de lumière adjacents agencés avec un dégagement prédéterminé (D2) les uns entre les autres, et la plaque de diffusion (10, 10A-10C) est agencée avec un dégagement prédéterminé (D3) par rapport à la plaque réfléchissante optique (4) de chacun de la pluralité de dispositifs de source de lumière (1, 1A, 1B, 1C, 1D).
  8. Dispositif d'éclairage de surface selon la revendication 7, dans lequel le dégagement (D2) vaut une moitié ou plus d'une distance maximale (W) entre des plaques latérales opposées du dispositif de source de lumière (1, 1A, 1B, 1C, 1D), le dégagement (D1) est une moitié ou plus du dégagement (D2), et le dégagement (D3) est une moitié ou moins de la distance (D2).
EP10817291.7A 2009-09-18 2010-09-17 Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse Not-in-force EP2479480B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009218115A JP5320599B2 (ja) 2009-09-18 2009-09-18 光源装置およびこの光源装置を用いた面照明装置
PCT/JP2010/066226 WO2011034178A1 (fr) 2009-09-18 2010-09-17 Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse

Publications (3)

Publication Number Publication Date
EP2479480A1 EP2479480A1 (fr) 2012-07-25
EP2479480A4 EP2479480A4 (fr) 2018-01-31
EP2479480B1 true EP2479480B1 (fr) 2018-10-31

Family

ID=43758776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10817291.7A Not-in-force EP2479480B1 (fr) 2009-09-18 2010-09-17 Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse

Country Status (5)

Country Link
EP (1) EP2479480B1 (fr)
JP (1) JP5320599B2 (fr)
KR (1) KR101731661B1 (fr)
CN (1) CN102498336B (fr)
WO (1) WO2011034178A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07114683B2 (ja) 1988-06-27 1995-12-13 合資会社山崎本店酒造場 わかめ焼酎
CA2796843C (fr) * 2010-04-23 2017-05-16 Opto Design, Inc. Appareil d'eclairage de surface et dispositif associe
JP5842274B2 (ja) * 2011-06-09 2016-01-13 株式会社オプトデザイン 照明装置
JP5837374B2 (ja) * 2011-09-09 2015-12-24 株式会社エンプラス 光束制御部材および照明装置
CN102506327A (zh) * 2011-11-08 2012-06-20 上海亚明灯泡厂有限公司 Led面光源模组以及获得均匀面光源白光的方法
KR101902394B1 (ko) * 2011-12-12 2018-09-28 엘지이노텍 주식회사 조명 유닛 및 그를 이용한 디스플레이 장치
DE102012205188A1 (de) * 2012-03-30 2013-10-02 Tridonic Gmbh & Co. Kg LED-Leuchte
JP6191265B2 (ja) 2013-06-17 2017-09-06 東芝ライテック株式会社 照明装置
RU2692685C2 (ru) 2014-03-27 2019-06-26 Филипс Лайтинг Холдинг Б.В. Светильник
CN104806906A (zh) * 2015-04-01 2015-07-29 欧普照明股份有限公司 一种灯具及其匀光组件
KR102566497B1 (ko) * 2016-04-15 2023-08-16 엘지이노텍 주식회사 발광 장치 및 이를 포함하는 조명 장치
EP3724551B1 (fr) 2017-12-15 2021-05-05 Signify Holding B.V. Boîtier de dispositif d'éclairage, luminaire et procédé de fabrication
JP2019129066A (ja) * 2018-01-24 2019-08-01 シャープ株式会社 照明装置及び表示装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09236803A (ja) * 1996-02-28 1997-09-09 Victor Co Of Japan Ltd 液晶ディスプレイ用バックライト
WO2003088195A1 (fr) 2002-04-17 2003-10-23 Kabushiki Kaisha Box Dispositif electroluminescent de surface
JP4459573B2 (ja) * 2003-08-22 2010-04-28 基晴 鈴木 照明装置
US8764230B2 (en) * 2004-02-11 2014-07-01 Koninklijke Philips N.V. Luminous body
JP2006164625A (ja) * 2004-12-03 2006-06-22 Seiko Instruments Inc 照明装置、及びこれを備える表示装置
JP4280283B2 (ja) 2006-01-27 2009-06-17 株式会社オプトデザイン 面照明光源装置及びこれを用いた面照明装置
JP4858241B2 (ja) * 2007-03-07 2012-01-18 パナソニック株式会社 照明ユニット及び照明装置
JP4764962B2 (ja) * 2007-06-22 2011-09-07 株式会社オプトデザイン 面照明光源装置及び面照明装置
JP4491540B2 (ja) * 2007-07-23 2010-06-30 株式会社オプトデザイン 光学反射板、面照明光源装置、および面照明装置
JP4538675B2 (ja) * 2007-10-26 2010-09-08 株式会社オプトデザイン 面照明ユニット、面照明光源装置、および面照明装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2479480A1 (fr) 2012-07-25
JP2011065971A (ja) 2011-03-31
KR101731661B1 (ko) 2017-04-28
EP2479480A4 (fr) 2018-01-31
CN102498336B (zh) 2015-02-18
JP5320599B2 (ja) 2013-10-23
CN102498336A (zh) 2012-06-13
WO2011034178A1 (fr) 2011-03-24
KR20120083330A (ko) 2012-07-25

Similar Documents

Publication Publication Date Title
EP2479480B1 (fr) Dispositif de source lumineuse et dispositif d'éclairage de surfaces utilisant un tel dispositif de source lumineuse
JP6695035B2 (ja) バックライト装置および液晶表示装置
US8640368B2 (en) Light source device, lighting device, and display device
US6964497B2 (en) Lighting device with point-shaped light sources
EP3318793B1 (fr) Dispositif de rétroéclairage et dispositif d'affichage à cristaux liquides
US8602580B2 (en) Lighting device, display device and television receiver
KR101752463B1 (ko) 엣지타입의 도광판 구조를 갖는 led 조명등
JP5920616B2 (ja) 直下型ｌｅｄバックライト装置及びそれを用いた液晶表示装置
US20120013811A1 (en) Lighting device, display device and television receiver
JP2010067439A (ja) 面発光装置および表示装置
CN104806926B (zh) 面光源装置及显示装置
JPWO2011030856A1 (ja) 点光源を用いた面照明方法、線状光源装置およびこの線状光源装置を用いた面照明装置
TW201307753A (zh) 使用發光體之面照明光源裝置
JP5417568B2 (ja) 面照明光源装置及びその面照明光源装置を複数配置した面照明装置
JP2011113752A (ja) バックライトユニット及びこれを用いた表示器
KR20060076220A (ko) 백라이트 시스템
US20120057330A1 (en) Lighting device, display device and television receiver
JP2011150861A (ja) Ｌｅｄ光源装置及びこの光源装置を用いた照明装置
JP2010067600A (ja) 光源装置およびこの光源装置を用いた照明装置
US20120057096A1 (en) Lighting device, display device and television receiver
JP6198120B2 (ja) 発光モジュール及びそれを用いた照明装置
JPH11306831A (ja) 面状光源ユニット
KR20140132571A (ko) 백라이트 유닛
JP5597091B2 (ja) 照明装置
KR20090119399A (ko) 미세한 반사성 구슬이 분포된 백라이트용 광학 패널

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120316

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20180105

RIC1 Information provided on ipc code assigned before grant

Ipc: F21V 7/00 20060101ALI20171222BHEP

Ipc: F21S 2/00 20160101AFI20171222BHEP

Ipc: F21V 11/14 20060101ALI20171222BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: F21V 7/00 20060101ALI20180529BHEP

Ipc: F21S 2/00 20060101AFI20180529BHEP

Ipc: F21V 11/14 20060101ALI20180529BHEP

INTG Intention to grant announced

Effective date: 20180621

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SATO, EIICHI

Inventor name: SATO, KEN

Inventor name: SATO, HIROYASU

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1059828

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602010054824

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181031

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1059828

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190131

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190228

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190131

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190201

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602010054824

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190923

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190917

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190917

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190917

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602010054824

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210401

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181031