EP1505560A2 - Guide de lumière pour dispositifs d' affichage à segments multiples - Google Patents

Guide de lumière pour dispositifs d' affichage à segments multiples Download PDF

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Publication number
EP1505560A2
EP1505560A2 EP04015509A EP04015509A EP1505560A2 EP 1505560 A2 EP1505560 A2 EP 1505560A2 EP 04015509 A EP04015509 A EP 04015509A EP 04015509 A EP04015509 A EP 04015509A EP 1505560 A2 EP1505560 A2 EP 1505560A2
Authority
EP
European Patent Office
Prior art keywords
optical fiber
light
optical
component according
mask
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.)
Granted
Application number
EP04015509A
Other languages
German (de)
English (en)
Other versions
EP1505560B1 (fr
EP1505560A3 (fr
Inventor
Tilmann Dr. Lorenz
Herbert Mayer
Bernward Dr. Reinker
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1505560A2 publication Critical patent/EP1505560A2/fr
Publication of EP1505560A3 publication Critical patent/EP1505560A3/fr
Application granted granted Critical
Publication of EP1505560B1 publication Critical patent/EP1505560B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G09F9/3023—Segmented electronic displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

Definitions

  • the present invention relates to an optical fiber device having a light entrance side and a Light exit side for multi-segment optical displays, comprising a mask in which Each segment is guided by a light guide in the form of the segment, using 2K injection molding technology is manufactured, and a corresponding optical assembly, which is for a multi-segment display is set up a home appliance with such an optical assembly and a method for manufacturing the optical fiber device in 2K injection molding.
  • From DE 101 12 640 C1 is a display device for household appliances with adosSegmenten known in the juxtaposed light guide in the form of light fingers pass through guide channels in guide bodies.
  • the display device is composed along the Lichtleitweges of several guide bodies, wherein the juxtaposed light fingers due to production by a photoconductive plate are connected. This has the disadvantage of having this connection Light is coupled into neighboring segments, causing light disturbances in the individual Segments arise that degrade the display quality. That's why it's necessary Cover the display area with a contour shutter to avoid the light interference cover and thus achieve sharper contours.
  • AEG is a light guide component for optical Multi-segment displays known, consisting of two plastic components (2K) in 2K injection molding is made. It is first made of a first plastic component made a mask, then injected into the second plastic component as a light guide becomes.
  • the material selection is subject to the condition that the mask during injection of the optical fiber material may not deform significantly to the light guiding property of the light guide does not deteriorate.
  • the known optical fiber component has a Mask made of glass fiber filled polyamide and a light guide made of polymethylmethacrylate on. The disadvantage of this combination of materials that the light guide with the Mask connects at least partially adhesive, whereby the light-guiding property of the light guide and thus the display quality is reduced.
  • the invention has the object of providing a cost-effective optical fiber component for optical Multi-segment displays to provide, with the installation depth of the circuit board designed variably behind a display surface with simultaneously high display quality can be.
  • a light guide component of the type mentioned characterized that between the mask and the light guide throughout an air gap, in particular is formed in the micrometer range. Through this air gap, light that is in propagates the optical fiber, totally reflected at the interface to the air gap, whereby the Light continues to be guided in the light guide and is not absorbed by the mask material. To this It is possible to keep the light losses low for light guides of great length, so that on the display surface, a high luminance and thus a high display quality is reached.
  • the mask material a light-tight, easy-flowing material with a low volume shrinkage during the cooling process is.
  • the mask material is a liquid crystalline polymer (LCP), such as Vectra. Due to the processing properties of this mask material is a production of long and filigree masks possible.
  • LCP liquid crystalline polymer
  • Fiber optic components can be manufactured with a large length, so that at large Mounting depths of the circuit board behind a display area, the light using the light guide component can be led to the display surface, creating a high quality display is achieved.
  • the optical fiber component realized in this mask material a small width of the individual segments and thus in addition to an improved visual appearance of the multi-segment display also a high display quality can be achieved.
  • the optical waveguide material a transparent amorphous plastic, in particular polymethyl methacrylate (PMMA) is.
  • PMMA polymethyl methacrylate
  • This optical fiber material has the advantage that it with the mask material LCP no Connects and shrinks strongly when cooled.
  • the finished sprayed fiber optic device between a continuous air gap Forming light guide and mask. That the air gap is due to a higher volume shrinkage of the optical fiber material relative to the mask material during the cooling process formed and is thus largely independent of the manufacturing process, resulting in a high process reliability leads.
  • PMMA has the advantage that it has a much lower melting point than the mask material LCP has.
  • the mask material are adapted such that a melting of the mask material upon injection of the optical fiber material into the forming mask to a minimum is reduced.
  • This has the advantage that the light guide exactly in the predetermined by the mask Optical fiber geometry is formed, since the optical fiber material, the mask material during the manufacturing process does not melt and thus deformed, creating a high Quality of the light pipe and thus a high display quality can be achieved.
  • the process for manufacturing the optical fiber component in 2K injection molding the optical fiber material via a ground pad at the light exit side in the mask injected in this way, it is possible closely adjacent segments with Fill fiber optic material.
  • this has indirect injection of the optical fiber material in the segment of the mask has the advantage that the light guide streaks and made bubble-free and thus a high quality of the light guide can be achieved.
  • a photoconductive plate forms the light guide material on the light exit side of the Lichtleiterbauteils a photoconductive plate, with the particular light guide each Segments is connected.
  • the photoconductive plate can be manufactured in such a way that it has a rough and / or a textured surface. Through the rough surface the leaking light is scattered so that the light distribution of each segment becomes even. Due to the structured surface, the structure of each Segments are highlighted, which makes the display even from oblique angles is clearly visible.
  • At least one injection point of the optical waveguide material is between the Segments arranged.
  • the Lichtleitmaterial evenly in the individual segments are injected.
  • Another advantage is that the injection point the light emission from the individual segments does not bother, creating a homogeneous Light distribution for each segment can be achieved.
  • the photoconductive plate protrudes laterally over the mask.
  • the shape of the plate adapted to a panel.
  • locking elements for fastening the optical fiber component are on the plate formed on a housing part and / or on a diaphragm part, so that a optical assembly, which is set up with the optical fiber component for a multi-segment display is, by means of these locking elements of the optical fiber component to the housing or on the aperture can be locked, for example, a household appliance. In this way is an assembly of the optical fiber component and thus the optical assembly on special easy way possible.
  • the optical fiber is polished at the light entrance side. This way a can Scattering of the incoming light can be reduced, producing more light in the light guide arrives. This has the advantage that even with long light guides a display with high Luminance can be achieved.
  • the optical fiber component at the Light entry side for each segment a recess for enclosing a light-emitting Component, in particular for enclosing a SMD LED has.
  • a recess for enclosing a light-emitting Component in particular for enclosing a SMD LED has.
  • this way may be in an optical assembly that contains SMD LEDs and in which such a fiber optic device is used, on the one hand a lot of light in the respective light guide
  • a coupling of the light in the light guide of another Segments are avoided. This has the advantage that for each segment only the light the associated light-emitting component passes into the light guide, whereby a particularly good optical separation of the individual segments is achieved from each other.
  • a Particularly good coupling of the light from the SMD LED into the light guide can thereby be achieved that the recess of the optical fiber component containing the SMD LED, filled with a transparent potting compound and / or with diffuser material. On in this way the number of optical transitions is reduced and thus the light loss minimized.
  • the light may be from the light source due to the scattering in the diffuser material particularly evenly distributed in the light guide of the respective segment are coupled.
  • the mask is cuboid and has locking elements for attachment the optical waveguide component on a printed circuit board and / or on a housing part, in particular on the light entry side.
  • the optical fiber device can be particularly simple be mounted on the circuit board.
  • the Optical fiber component at the light entry side are locked with an electronic circuit board on the SMD LEDs are arranged.
  • each one Locking element arranged so that it starts from one to the assigned, in parallel directed to the light guides cuboid edge is directed freely movable on the circuit board, and the two remaining, parallel to the light guides edges each have a linear, formed in a negative mold to the locking element recess on, which can be positively connected with the latching element of an adjacent light guide component is.
  • the optical fiber material and / or the mask material is colored in itself.
  • the optical fiber component in a Household appliance of the light guide and / or the mask according to the housing or the Aperture is colored in itself. This has the advantage that the optical fiber component and thus the optical assembly with the optical fiber component optically to the housing or the aperture can be adjusted so that only the display on the display surface visible is.
  • optical fiber device is preferably used in optical assemblies that are suitable for multi-segment displays, especially for 7-segment displays.
  • Such assemblies are used as display devices in the housing or the Panel of household appliances used, as in this way modifications of the housing or Blend designs are feasible without the circuit board or the electronics must be changed.
  • an optical fiber device 1 for a optical 7-segment display with decimal point shown schematically.
  • the fiber optic device 1 consists of a cuboid base body 2, which has a mask M with parallel Channels K, wherein the mask M in cross section of a 7-segment display with Decimal point corresponds.
  • the channels K of the main body 2 is for each of the seven Segments of the 7-segment display depending on a light guide 3 with a segment-shaped cross-sectional area and for the decimal point, a light guide 4 having a circular cross-sectional area from a light entrance side 5 to one of the light entrance side 5 opposite Light exit side 6 out.
  • the light guides 3, 4 open in a photoconductive plate 7, which is arranged on the base body 2 and a planar Surface 8 has.
  • the light guides 3, 4 are shown in FIG. 1 by dashed lines, since they are under the light-conducting plate 7.
  • Each of the segmental light guides 3 has a width B and the circular light guide 4 has a diameter D, both especially less than or equal to one millimeter.
  • the individual segmental Light guides 3 are separated from each other by webs S of the mask M of the Light entrance side 5 is separated up to the light exit side 6.
  • each latching element 11 is arranged such that, starting from one at the associated, Parallel to the light guides 3, 4 lying cuboid edge 10 on the light entrance side 5 of the optical fiber component 1 protrudes and is free to move.
  • the base body 2 At the two remaining, to the light guides 3, 4 parallel edges 12, the base body 2 each one line-shaped recess 13 which is formed positively to the locking elements 11 is.
  • the curvature 14 of the locking elements 11 corresponds in its negative shape of the curvature 15 of the recesses 13.
  • the light guide component 1 can thus another identical Fiber optic component 1 are arranged without gaps (not shown), since the locking element 11 positively fits into the recess 13.
  • FIG. 3 shows a section along the light guides 3, 4 through an optical assembly 16, which is set up for the optical 7-segment display.
  • the optical assembly 16 includes the optical fiber device 1 and a printed circuit board 17 with SMD LEDs 18 as light-emitting Components.
  • the light guide component 1 is with its locking elements 11 in holes 19 of Printed circuit board 17 locked.
  • the SMD LEDs 18 are from the recesses 9 of the optical fiber device 1, so that emitted by the SMD LEDs light only in through Arrows marked direction along the light guide 3, 4 can propagate.
  • An overcoupling of Light of the SMD LED in adjacent light guide 3, 4 is avoided by that on the Light entry side 5, the optical fiber component 1 between the recesses 9 positively with the circuit board 17 closes.
  • These recesses 9 can be used in particular of SMD LED chips 18 without LED housing with a transparent potting compound filled on the one hand protects the SMD LED chips 18 from damage and on the other hand improves the light coupling of the emitted light in the light guide 3, 4, because the number of optical transitions is reduced and the transparent potting compound can be chosen such that their optical refractive index to that of the optical waveguide 3, 4th is adjusted.
  • the recesses 9 can also be filled with diffuser material, by which light emitted from the SMD LEDs is scattered, so that the light with a uniform distribution in the light guides 3, 4 occurs. In general, others can light-emitting components are used, such as LEDs or incandescent lamps, the dimensions of the optical fiber component can be adjusted accordingly.
  • an air gap 20 is formed, in particular of an order of magnitude of micrometers.
  • the photoconductive plate 7 shows a structured surface 21 in FIG. 3, in which the individual segments 22 of the 7-segment display are highlighted in plastic. The light leaves the individual segments 22 at the light exit side 6 thus at different angles to the longitudinal direction the light guide 3, 4, whereby it is well visible even at these angles.
  • FIG. 4 schematically shows a section along the optical waveguide 3 through a diaphragm part 23 an optical assembly 16, which according to another embodiment the invention is adapted for a multi-segment optical display.
  • the light-conducting Plate 7 extends in its planar extension beyond the base body 2 and has a curved shape, which is adapted to the curvature of the diaphragm part 23.
  • the Outer contour can, as shown, a rectangular shape or any other desired shape exhibit.
  • 7 locking elements 24 are integrally formed on the photoconductive plate formed, which are bounded at the light exit side 6 of the plate 7 and parallel to Point light guide component 1 to the light entry side 5.
  • At the diaphragm part 23 are counter-locking elements 25 formed with which the locking elements 25 for mounting the optical Assembly 16 are latched to the panel part 23.
  • the optical fiber component 1 is made in 2K injection molding of two plastic components (2K) made.
  • the base body 2 with the mask M is made of an opaque, easy-flowing material with a low volume shrinkage during the cooling process made according to the invention, a liquid crystalline polymer (LCP), such. Vectra® is. Due to the processing properties of this liquid crystalline polymer is the production of long and filigree masks M possible.
  • a transparent amorphous plastic in particular polymethyl methacrylate (PMMA) is.
  • the PMMA has a lower melting point than LCP, allowing the temperature of the PMMA melt during the manufacturing process can be chosen so that the mask M If possible, do not melt when injecting the PMMA.
  • the PMMA is over a mass cushion P injected at the light exit side 6 in the mask M, which is the photoconductive Plate 7 forms.
  • Figure 1 are centrally between the individual light guides 3 two injection points A shown in dotted lines through which the ground pad P filled with PMMA becomes. Starting from this mass cushion P PMMA is in channels K of the mask M pressed.
  • a volume shrinkage occurs on. This is at an LCP, such as Vectra® very low, while the Volume shrinkage of PMMA in the order of 0.6%.
  • the volume shrinkage of the optical fiber material relative to the mask material during the cooling process significantly higher, resulting in a over the entire length L of the light guide 3, 4 continuous air gap 20 between light guide 3, 4 and mask M is formed.
  • the formation of the air gap 20 is largely of the manufacturing process independent, resulting in a high process reliability for the production of optical fiber components 1 results.
  • the optical fiber component 1 with a ratio of length L to width B or diameter D of the optical fibers 3, 4 are made, which is greater than 13 or in of the order of 30 lies.
  • the width B or the diameter D the light guide 3, 4 is less than or equal to 1 millimeter and the length L of the light guides is 35 millimeters be.
  • a digit height of the 7-segment display of 10 millimeters realized with a segment width of 1 millimeter and a fiber optic length of 35 millimeters become.
  • other dimensions of the optical waveguide component 1 are also possible.
  • the plastic for forming the light guides 3, 4 or the light-conducting Plate 7 and / or the plastic to form the body 2 dyed in it be.
  • the light guides 3, 4 and the photoconductive plate 7 in color be adapted to the diaphragm part 23 or to a housing part such that segments of the Multi-segment display only visible when illuminated.
  • the light-emitting Components are chosen such that they emit colored light, so that a contrast in color between illuminated and unlit segments of the Multi-segment display results.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP04015509A 2003-07-22 2004-07-01 Guide de lumière pour dispositifs d' affichage à segments multiples Expired - Lifetime EP1505560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333316A DE10333316A1 (de) 2003-07-22 2003-07-22 Lichtleiterbauteil für optische Mehrsegmentsanzeigen
DE10333316 2003-07-22

Publications (3)

Publication Number Publication Date
EP1505560A2 true EP1505560A2 (fr) 2005-02-09
EP1505560A3 EP1505560A3 (fr) 2005-12-14
EP1505560B1 EP1505560B1 (fr) 2012-03-07

Family

ID=33547032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04015509A Expired - Lifetime EP1505560B1 (fr) 2003-07-22 2004-07-01 Guide de lumière pour dispositifs d' affichage à segments multiples

Country Status (4)

Country Link
EP (1) EP1505560B1 (fr)
AT (1) ATE548722T1 (fr)
DE (1) DE10333316A1 (fr)
ES (1) ES2380829T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013174715A1 (fr) * 2012-05-23 2013-11-28 Unilever Plc Dispositif d'affichage avant entièrement non noir
WO2013174705A1 (fr) * 2012-05-23 2013-11-28 Unilever Plc Dispositif d'affichage avant entièrement incurvé
WO2016008903A1 (fr) * 2014-07-16 2016-01-21 BSH Hausgeräte GmbH Dispositif d'affichage et appareil ménager comportant un tel dispositif d'affichage

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DE102008061853A1 (de) * 2008-12-15 2010-06-24 Gigaset Communications Gmbh Segmentanzeige mit einem Lichtleiter
DE102010025247A1 (de) * 2010-06-26 2011-12-29 Diehl Ako Stiftung & Co. Kg Anzeigeeinrichtung
CN105900161A (zh) * 2013-08-22 2016-08-24 麦卡斯音乐公司 交互式钢琴训练系统
FR3019258B1 (fr) 2014-03-31 2019-04-05 Valeo Vision Guide de lumiere comportant une surface de sortie recouverte de matiere diffusante
DE102019202831A1 (de) * 2019-03-01 2020-09-03 BSH Hausgeräte GmbH Anzeigemittel mit einer Streufolie

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Publication number Priority date Publication date Assignee Title
WO2013174715A1 (fr) * 2012-05-23 2013-11-28 Unilever Plc Dispositif d'affichage avant entièrement non noir
WO2013174705A1 (fr) * 2012-05-23 2013-11-28 Unilever Plc Dispositif d'affichage avant entièrement incurvé
US20130314642A1 (en) * 2012-05-23 2013-11-28 Conopco, Inc., D/B/A Unilever Non-black dead front display
US8967834B2 (en) 2012-05-23 2015-03-03 Iluminage Beauty, Ltd. Curved dead front display
CN104395949A (zh) * 2012-05-23 2015-03-04 伊卢米内奇美容有限公司 弯曲死正面显示器
CN104508732A (zh) * 2012-05-23 2015-04-08 伊卢米内奇美容有限公司 非黑色死正面显示器
WO2016008903A1 (fr) * 2014-07-16 2016-01-21 BSH Hausgeräte GmbH Dispositif d'affichage et appareil ménager comportant un tel dispositif d'affichage
CN106662702A (zh) * 2014-07-16 2017-05-10 Bsh家用电器有限公司 显示装置和具有这样的显示装置的家用器具
RU2676056C2 (ru) * 2014-07-16 2018-12-25 Бсх Хаусгерете Гмбх Индикаторное устройство и бытовой прибор с таким индикаторным устройством
EP3170044B1 (fr) * 2014-07-16 2019-11-20 BSH Hausgeräte GmbH Dispositif d'affichage et appareil ménager comportant un tel dispositif d'affichage
CN106662702B (zh) * 2014-07-16 2020-04-24 Bsh家用电器有限公司 显示装置和具有这样的显示装置的家用器具

Also Published As

Publication number Publication date
ES2380829T3 (es) 2012-05-18
EP1505560B1 (fr) 2012-03-07
ATE548722T1 (de) 2012-03-15
DE10333316A1 (de) 2005-02-10
EP1505560A3 (fr) 2005-12-14

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