WO2012165249A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision - Google Patents

Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Download PDF

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Publication number
WO2012165249A1
WO2012165249A1 PCT/JP2012/063155 JP2012063155W WO2012165249A1 WO 2012165249 A1 WO2012165249 A1 WO 2012165249A1 JP 2012063155 W JP2012063155 W JP 2012063155W WO 2012165249 A1 WO2012165249 A1 WO 2012165249A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
led
light guide
liquid crystal
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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.)
Ceased
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PCT/JP2012/063155
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English (en)
Japanese (ja)
Inventor
裕紀 行方
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Sharp Corp
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Sharp Corp
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Publication of WO2012165249A1 publication Critical patent/WO2012165249A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H04N5/65—Holding-devices for protective discs or for picture masks

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • liquid crystal panels have been widely used as display units for televisions, mobile phones, portable information terminals and the like. Since the liquid crystal panel cannot emit light by itself, the light of an illumination device (so-called backlight device) is used to display an image.
  • This illuminating device is arranged on the back side of the liquid crystal panel, and is configured to irradiate light spreading in a plane toward the back side of the liquid crystal panel.
  • Patent Document 1 a device including a light guide plate and a light source disposed so as to face an end surface of the light guide plate is known.
  • This type of illumination device is generally known as a side light type (or edge light type), and as shown in Patent Document 2, in recent years, an LED (Light Emitting Diode) light source is used as a light source.
  • LED Light Emitting Diode
  • the LED light source is mounted on a long substrate as shown in Patent Document 2. On this substrate, a plurality of LED light sources are mounted in a line at predetermined intervals. A gap is provided in advance between the end face of the light guide plate and the LED light source in consideration of thermal expansion of the light guide plate.
  • the light emitted from the LED light source does not enter the end face of the light guide plate, and is between the LED light source and the end face of the light guide plate.
  • a frame-like frame is arranged on the front side of the light guide plate so as to cover the periphery of the light guide plate, and the light described above passes between the frame and the light guide plate toward the back side of the liquid crystal panel. Leaking. This leaked light causes a problem that a portion that is brightly illuminated locally is formed in the display area of the liquid crystal panel surrounded by the frame.
  • the locally brightly illuminated portion appears on the edge side of the display area, and the inside of the display area becomes relatively dark. That is, this locally brightly illuminated part causes uneven brightness (so-called eyeball unevenness) of the lighting device (and display device), which is a problem.
  • An object of the present invention is to provide a technology that suppresses light leaking outside through a gap formed between a light guide plate and an LED light source, thereby suppressing luminance unevenness of the lighting device.
  • a lighting device includes a plurality of LED light sources having a light exit surface for emitting light, a light guide plate for emitting light incident inside from an end surface to the outside from a front plate surface, and the LED light source mounted thereon.
  • an LED substrate disposed so that the light exit surface of the mounted LED light source faces the end surface, and a shape bent from the back surface of the light guide plate to the front surface of the light guide plate
  • a reflective sheet that covers a gap formed between the end face and the light exit surface from the front side of the light guide plate.
  • the reflection sheet extends from the end surface side of the light guide plate toward the LED substrate side, rises from the extension portion, and is fitted into the LED light source to expose the light exit surface.
  • You may have a standing part containing an opening part, and a cover part which extends toward the end surface side of the said light-guide plate from this standing part, and covers the said clearance gap from the front side of the said light-guide plate.
  • the cover portion may be inclined so as to rise from the light exit surface side toward the end surface side.
  • the extending portion may be inclined so as to descend from the light exit surface side toward the end surface side.
  • the cover portion may include a light shielding material.
  • the cover portion may include a vent hole.
  • the display device includes the illumination device and a display panel that performs display using light from the illumination device.
  • the display panel includes a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
  • a television receiver according to the present invention includes the display device.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
  • Exploded perspective view showing schematic configuration of liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal panel Enlarged plan view showing the planar configuration of the array substrate
  • FIG. 6 is an enlarged cross-sectional view of the liquid crystal display device shown in FIG.
  • Reflective sheet and light source unit perspective view Enlarged sectional view of the liquid crystal display device according to Embodiment 2
  • FIG. 4 is an enlarged cross-sectional view of a liquid crystal display device according to Embodiment 3.
  • FIG. 1 The perspective view of the reflective sheet and light source unit which are used for the backlight apparatus with which the liquid crystal display device which concerns on Embodiment 4 is equipped.
  • An enlarged plan view showing a planar configuration of a CF substrate according to another embodiment 7 of the present invention An enlarged plan view showing a planar configuration of a CF substrate according to another embodiment 8 of the present invention.
  • An enlarged plan view showing a planar configuration of a CF substrate according to another embodiment 9 of the present invention An enlarged plan view showing a planar configuration of a CF substrate according to another embodiment 10 of the present invention.
  • the enlarged plan view which shows the plane structure of the array substrate which concerns on other Embodiment 10 of this invention.
  • An enlarged plan view showing a planar configuration of a CF substrate according to another twelfth embodiment of the present invention An enlarged plan view showing a plane configuration of an array substrate according to another embodiment 13 of the present invention.
  • An enlarged plan view showing a plane configuration of a CF substrate according to another embodiment 14 of the present invention An enlarged plan view showing a plane configuration of an array substrate according to another embodiment 15 of the present invention.
  • Embodiment 1 of the present invention will be described with reference to FIGS.
  • the liquid crystal display device 10 is illustrated.
  • a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
  • the upper side shown in FIG.2 and FIG.3 be a front side, and let the lower side of the figure be a back side.
  • the television receiver TV includes a liquid crystal display device (an example of a display device) 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, and power supply.
  • Power supply circuit board P a tuner (receiver) T capable of receiving a TV image signal, and an image conversion circuit board for converting the TV image signal output from the tuner T into an image signal for the liquid crystal display device 10 A VC and a stand S are provided.
  • the liquid crystal display device 10 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole, the long side direction is the horizontal direction (X-axis direction), and the short side direction is the vertical direction (Y-axis direction, vertical direction). They are housed in a matched state. As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (an example of a lighting device) 12 that is an external light source. It is designed to be held together.
  • the configuration of the liquid crystal panel 11 in the liquid crystal display device 10 will be described.
  • the liquid crystal panel 11 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole.
  • a pair of transparent (translucent) glass substrates 11a and 11b And a liquid crystal layer 11c containing liquid crystal, which is a substance whose optical characteristics change with application of an electric field.
  • the substrates 11a and 11b maintain a gap corresponding to the thickness of the liquid crystal layer. In the state, they are bonded together by a sealing agent (not shown).
  • polarizing plates 11d and 11e are attached to the outer surface sides of both the substrates 11a and 11b, respectively. Note that the long side direction of the liquid crystal panel 11 coincides with the X-axis direction, and the short side direction coincides with the Y-axis direction.
  • the front side is the CF substrate 11a
  • the back side is the array substrate 11b
  • TFTs Thin Film Transistors
  • pixel electrodes 15 which are switching elements are matrixed.
  • a large number of gate wirings 16 and source wirings 17 are arranged around the TFTs 14 and the pixel electrodes 15 so as to surround the TFTs 14 and the pixel electrodes 15.
  • the pixel electrode 15 has a vertically long (longitudinal) rectangular shape (rectangular shape) in which the long side direction coincides with the Y-axis direction and the short side direction coincides with the X-axis direction, and is made of ITO (Indium Tin Oxide) or ZnO. It consists of a transparent electrode such as (Zinc Oxide).
  • the gate wiring 16 and the source wiring 17 are connected to the gate electrode and the source electrode of the TFT 14, respectively, and the pixel electrode 15 is connected to the drain electrode of the TFT 14. Further, an alignment film 18 for aligning liquid crystal molecules is provided on the TFT 14 and the pixel electrode 15 on the liquid crystal layer 11c side, as shown in FIG.
  • a terminal portion led out from the gate wiring 16 and the source wiring 17 is formed at an end portion of the array substrate 11b, and a driver component for driving a liquid crystal (not shown) is connected to the anisotropic conductive film (not shown).
  • ACF Anisotropic Conductive Film (crimp connection) is used, and the driver components for driving the liquid crystal are electrically connected to a display control circuit board (not shown) via various wiring boards.
  • This display control circuit board is connected to an image conversion circuit board VC (see FIG. 1) in the television receiver TV, and based on an output signal from the image change circuit board VC, each wiring 16, 17 is connected via a driver component. It is assumed that a drive signal is supplied to.
  • a color filter 19 in which the portions R, G, B, and Y are arranged in a matrix (matrix) is provided.
  • the color filter 19 according to the present embodiment includes a yellow colored portion Y in addition to a red colored portion R, a green colored portion G, and a blue colored portion B that are the three primary colors of light.
  • the colored portions R, G, B, and Y selectively transmit light of each corresponding color (each wavelength).
  • Each colored portion R, G, B, Y has a vertically long (longitudinal) rectangular shape (rectangular shape) in which the long side direction coincides with the Y-axis direction and the short side direction coincides with the X-axis direction, like the pixel electrode 15. I am doing.
  • a lattice-shaped light shielding layer (black matrix) BM is provided to prevent color mixing.
  • a counter electrode 20 and an alignment film 21 are sequentially stacked on the color filter 19 on the CF substrate 11 a on the liquid crystal layer 11 c side.
  • the colored portions R, G, B, and Y constituting the color filter 19 will be described in detail.
  • the colored portions R, G, B, and Y are arranged in a matrix with the X-axis direction as the row direction and the Y-axis direction as the column direction.
  • Y have the same dimension in the column direction (Y-axis direction), but the dimension in the row direction (X-axis direction) is different for each colored portion R, G, B, Y.
  • the colored portions R, G, B, and Y are arranged in the row direction in the order of the red colored portion R, the green colored portion G, the blue colored portion B, and the yellow colored portion Y from the left side shown in FIG.
  • the red colored portion R and the blue colored portion B in the row direction are relatively larger than the yellow colored portion Y and the green colored portion G in the row direction. It is said. That is, the colored portions R and B having relatively large dimensions in the row direction and the colored portions G and Y having relatively small dimensions in the row direction are alternately and repeatedly arranged in the row direction. Thereby, the area of the red coloring part R and the blue coloring part B is made larger than the areas of the green coloring part G and the yellow coloring part Y. The areas of the blue colored portion B and the red colored portion R are equal to each other. Similarly, the areas of the green colored portion G and the yellow colored portion Y are equal to each other. 3 and 5 show a case where the areas of the red colored portion R and the blue colored portion B are about 1.6 times the areas of the yellow colored portion Y and the green colored portion G. Show.
  • the dimension in the row direction (X-axis direction) of the pixel electrode 15 varies from column to column. . That is, among the pixel electrodes 15, the size and area in the row direction of the pixel electrode 15 that overlaps with the red color portion R and the blue color portion B are the same as those in the row direction of the pixel electrode 15 that overlaps with the yellow color portion Y and the green color portion G. It is relatively larger than the size and area.
  • the gate wirings 16 are all arranged at an equal pitch, while the source wirings 17 are arranged at two different pitches depending on the dimensions of the pixel electrodes 15 in the row direction.
  • the liquid crystal display device 10 uses the liquid crystal panel 11 including the color filter 19 including the four colored portions R, G, B, and Y, as shown in FIG.
  • the television receiver TV is provided with a dedicated image conversion circuit board VC. That is, the image conversion circuit board VC converts the television image signal output from the tuner T into an image signal of each color of blue, green, red, and yellow, and outputs the generated image signal of each color to the display control circuit board. can do. Based on this image signal, the display control circuit board drives the TFTs 14 corresponding to the pixels of each color in the liquid crystal panel 11 via the wirings 16 and 17, and transmits the colored portions R, G, B, and Y of each color. The amount of light can be appropriately controlled.
  • the backlight device 12 includes a substantially box-shaped chassis (accommodating member) 22 having an opening that opens toward the light emitting surface side (the liquid crystal panel 11 side), and an opening of the chassis 22. And an optical sheet 23 arranged to cover the part. Further, in the chassis 22, an LED 24 that is a light source, an LED substrate (light source substrate) 25 on which the LED 24 is mounted, and a light guide plate that guides light from the LED 24 and guides it to the optical sheet 23 (liquid crystal panel 11). 26 and a frame 27 for pressing a predetermined position of the light guide plate 26 from the front side.
  • the light source unit 2 includes an LED 24 and an LED substrate 25.
  • the backlight device 12 is a so-called edge light type (side light type) in which the LEDs 24 mounted on the LED substrate 25 are arranged at both ends of the light guide plate 26, respectively.
  • the edge light type backlight device 12 is integrally assembled to the liquid crystal panel 11 by a bezel 13 having a frame shape, thereby constituting the liquid crystal display device 10.
  • the chassis (accommodating member) 22 is made of metal and, as shown in FIGS. 2 and 6, rises from a bottom plate 22a having a horizontally long rectangular shape as in the liquid crystal panel 11, and from the outer ends of each side of the bottom plate 22a. It consists of a side wall 22b, and as a whole has a shallow, substantially box shape that opens toward the front side.
  • the chassis 22 (bottom plate 22a) has a long side direction that matches the X-axis direction (horizontal direction), and a short side direction that matches the Y-axis direction (vertical direction).
  • the frame 27 and the bezel 13 can be screwed to the side wall 22b. As shown in FIGS.
  • the bottom plate 22a is provided with a pair of protrusions 22c that face each other on the bottom plate 22a. These protrusions 22c are provided so as to protrude from the surface (plate surface) of the bottom plate 22a.
  • the protrusion 22c is made of, for example, a resin molded product, and is retrofitted at a predetermined position on the bottom plate 22a of the chassis 22.
  • the protrusion 22c is fixed to the bottom plate 22a using a screw (not shown). In other embodiments, the protrusion 22c may be fixed to the bottom plate 22a using an adhesive or the like, or may be integrally formed of the same material as the chassis 22.
  • the protrusion 22 c of this embodiment has a rectangular parallelepiped shape, and is provided on the inner side of the side wall 22 b on the short side of the chassis 22. Each protrusion 22c is disposed at the approximate center of each side wall 22b.
  • the optical sheet 23 has a horizontally long rectangular shape as a whole when viewed in a plane like the liquid crystal panel 11 and the chassis 22, and has a thin sheet shape.
  • the optical sheet 23 is placed on the front side (light emitting side) of the light guide plate 26 and is disposed between the liquid crystal panel 11 and the light guide plate 26.
  • the optical sheet 23 is formed by laminating a diffusion sheet 23a, a lens sheet 23b, and a reflective polarizing plate 23c in order from the light guide plate 26 side.
  • the optical sheet 23 of this embodiment is provided with notches 123 and 123 at both ends on the short side.
  • the notches 123 and 123 are provided at substantially the center of each side on the short side.
  • the frame 27 includes a frame-shaped saddle plate 27a that covers the outer peripheral portion W (see FIG. 7) on the front-side plate surface (front surface) 26a of the light guide plate 26, and an outer edge of the flange plate 27a. And an outer wall 27b extending downward.
  • the frame 27 is made of a synthetic resin and has a light shielding property by having a surface with, for example, a black color. Further, the frame 27 can receive the outer peripheral end portion of the liquid crystal panel 11 on the front side of the flange plate 27a.
  • the frame 27 of the present embodiment is provided with a pressing portion 27c on the back side of the flange plate 27a (see FIG. 6).
  • the LED 24 is mounted on the LED substrate 25 and is a so-called top type in which a surface opposite to the mounting surface with respect to the LED 25 is a light emitting surface 24 a.
  • the LED 24 includes an LED chip (not shown) that emits blue light as a light source, and also includes a green phosphor and a red phosphor as phosphors that emit light when excited by blue light.
  • the LED 24 has a configuration in which an LED chip made of, for example, an InGaN-based material is sealed with a resin material on a substrate portion fixed to the LED substrate 25.
  • the LED chip mounted on the substrate part has a main emission wavelength in the range of 420 nm to 500 nm, that is, in the blue wavelength region, and can emit blue light (blue monochromatic light) with excellent color purity. Is done.
  • As a specific main emission wavelength of the LED chip for example, 451 nm is preferable.
  • the resin material that seals the LED chip is excited by the blue phosphor emitted from the LED chip and the green phosphor that emits green light by being excited by the blue light emitted from the LED chip. And a red phosphor emitting red light is dispersed and blended at a predetermined ratio.
  • the LED 24 is made up of blue light (blue component light) emitted from these LED chips, green light (green component light) emitted from the green phosphor, and red light (red component light) emitted from the red phosphor. Is capable of emitting light of a predetermined color as a whole, for example, white or blueish white.
  • the LED 24 Since yellow light is obtained by synthesizing the green component light from the green phosphor and the red component light from the red phosphor, the LED 24 includes the blue component light and the yellow component from the LED chip. It can be said that it also has the light of.
  • the chromaticity of the LED 24 varies depending on, for example, the absolute value or relative value of the content of the green phosphor and the red phosphor, and accordingly the content of the green phosphor and the red phosphor is adjusted as appropriate. Thus, the chromaticity of the LED 24 can be adjusted.
  • the green phosphor has a main emission peak in the green wavelength region of 500 nm to 570 nm
  • the red phosphor has a main emission peak in the red wavelength region of 600 nm to 780 nm. It is said.
  • the green phosphor and the red phosphor provided in the LED 24 will be described in detail.
  • ⁇ -SiAlON which is a kind of sialon phosphor
  • the sialon-based phosphor is a substance in which a part of silicon atoms of silicon nitride is replaced with aluminum atoms and a part of nitrogen atoms with oxygen atoms, that is, a nitride.
  • a sialon phosphor, which is a nitride has excellent luminous efficiency and durability compared to other phosphors made of, for example, sulfide or oxide.
  • “excellent in durability” specifically means that, even when exposed to high-energy excitation light from an LED chip, the luminance does not easily decrease over time.
  • Rare earth elements for example, Tb, Yg, Ag, etc.
  • ⁇ -SiAlON which is a kind of sialon-based phosphor, has a general formula Si6-ZAlZOZN: Eu (z indicates a solid solution amount) or (Si, Al) 6 in which aluminum and oxygen are dissolved in ⁇ -type silicon nitride crystal. (O, N) 6: a substance represented by Eu.
  • the ⁇ -SiAlON for example, Eu (europium) is used as an activator, and thereby the color purity of green light, which is fluorescent light, is particularly high. It is extremely useful in adjusting On the other hand, as the red phosphor, it is preferable to use casoon, which is a kind of cascading phosphor.
  • Cousin-based phosphors are nitrides containing calcium atoms (Ca), aluminum atoms (Al), silicon atoms (Si), and nitrogen atoms (N). For example, other phosphors made of sulfides, oxides, etc. In comparison, it is excellent in luminous efficiency and durability.
  • the cascading phosphor uses rare earth elements (for example, Tb, Yg, Ag, etc.) as an activator.
  • Casun which is a kind of cousin phosphor, uses Eu (europium) as an activator and is represented by the composition formula CaAlSiN3: Eu.
  • the LED board 25 has an elongated plate shape extending along the long side direction of the chassis 22 (X-axis direction, the longitudinal direction of the light incident surface 26b of the light guide plate 26), and its main plate.
  • the surface is accommodated in the chassis 22 in a posture parallel to the X-axis direction and the Z-axis direction, that is, in a posture orthogonal to the liquid crystal panel 11 and the light guide plate 26 (optical sheet 23).
  • a pair of LED substrates 25 are arranged corresponding to both end portions on the long side in the chassis 22.
  • the LED 24 having the above-described configuration is surface-mounted on the light source surface (surface facing the light guide plate 26, substrate surface) 25a facing the inner side, that is, the light guide plate 26 side, of the main surface of the LED substrate 25.
  • a plurality of LEDs 24 are arranged in a line (linearly) in parallel along the length direction (X-axis direction) on the light source surface 25 a of the LED substrate 25. Accordingly, it can be said that a plurality of LEDs 24 are arranged in parallel along the long side direction at both ends of the long side of the backlight device 12.
  • the pair of LED boards 25 are accommodated in the chassis 22 in such a manner that the light source faces (mounting faces of the LEDs 24) 25a face each other, the light emitting faces (light emission) of the LEDs 24 respectively mounted on the LED boards 25.
  • Surface) 24a is opposed to each other, and the optical axis of each LED 24 substantially coincides with the Y-axis direction.
  • the base material of the LED substrate 25 is made of a metal such as an aluminum material same as that of the chassis 22, and a wiring pattern (not shown) made of a metal film such as a copper foil is formed on the surface thereof via an insulating layer.
  • a wiring pattern (not shown) made of a metal film such as a copper foil is formed on the surface thereof via an insulating layer.
  • the outermost surface is formed with a reflective layer (not shown) that exhibits white light with excellent light reflectivity.
  • the LEDs 24 arranged in parallel on the LED substrate 25 are connected in series by this wiring pattern.
  • insulating materials such as a ceramic.
  • the light guide plate 26 is a plate-like member made of a synthetic resin material (for example, acrylic resin such as PMMA or polycarbonate) having a refractive index higher than air and substantially transparent (excellent translucency). As shown in FIG. 2 and the like, the light guide plate 26 has a horizontally long rectangular shape when viewed from the same plane as the liquid crystal panel 11 and the chassis 22. The long side direction is the X-axis direction and the short side direction is Y. It is consistent with the axial direction. As shown in FIG. 6, the light guide plate 26 is disposed in the chassis 22 and directly below the liquid crystal panel 11 and the optical sheet 23, and a pair of LED substrates disposed at both ends on the long side of the chassis 22.
  • a synthetic resin material for example, acrylic resin such as PMMA or polycarbonate
  • the alignment direction of the LED 24 (LED substrate 25) and the light guide plate 26 matches the Y-axis direction, while the alignment direction of the optical sheet 23 (liquid crystal panel 11) and the light guide plate 26 matches the Z-axis direction. It is assumed that both directions are orthogonal to each other.
  • the light guide plate 26 introduces the light emitted from the LED 24 in the Y-axis direction, and rises and emits the light toward the optical sheet 23 (Z-axis direction) while propagating the light inside. Have.
  • the light guide plate 26 includes a pair of end surfaces (first end surfaces) 26b and 26b in the long side direction and a pair of end surfaces (second end surfaces) 26d and 26d in the short side direction.
  • the end face 26b and the end face 26d are formed on the light guide plate 26 so as to cross each other.
  • the end surfaces 26d and 26d of the light guide plate 26 are respectively provided with concave portions 26e and 26e that are recessed inward.
  • the light guide plate 26 is selectively pressed by the pressing portion 27c provided in the frame 27 on the periphery of the recesses 26e and 26e on the surface thereof.
  • the light guide plate 26 has a substantially flat plate shape extending along the plate surfaces of the bottom plate 22a of the chassis 22 and the optical sheet 23, and the main plate surface thereof extends in the X-axis direction and It is assumed to be parallel to the Y-axis direction.
  • the surface facing the front side is a light emitting surface (light emitting surface, surface) 26 a that emits internal light toward the optical sheet 23 and the liquid crystal panel 11.
  • both end surfaces 26b and 26b on the long side extending in the X-axis direction are spaced apart from the LED 24 (LED substrate 25) by a predetermined distance.
  • the light incident surfaces 26b are the light incident surfaces 26b on which the light emitted from the LEDs 24 is incident.
  • the light incident surface (end surface) 26b is a surface parallel to the X axis direction and the Z axis direction, and is a surface substantially orthogonal to the light exit surface (surface) 26a. Further, the alignment direction of the LED 24 and the light incident surface (end surface) 26b coincides with the Y-axis direction and is parallel to the light exit surface 26a.
  • a reflection sheet 29 that reflects the light in the light guide plate 26 and can be raised to the front side is provided to cover the entire area. It has been. As will be described later, the end portion of the reflection sheet 29 protrudes outward from the end surface 26b of the light guide plate 26, and the protruding portion is bent so as to reach the light output surface (surface) 26a of the light guide plate 26. .
  • At least one of the light exit surface 26a and the opposite surface (back surface) 26b on the opposite side of the light guide plate 26 is a reflective portion (not shown) for reflecting internal light or a scattering portion (see FIG. (Not shown) is patterned so as to have a predetermined in-plane distribution, whereby the light emitted from the light exit surface 26a is controlled to have a uniform distribution in the plane.
  • the color filter 19 of the liquid crystal panel 11 includes a yellow colored portion in addition to the colored portions R, G, and B, which are the three primary colors of light, as shown in FIGS. Since Y is included, the color gamut of the display image displayed by the transmitted light is expanded, so that it is possible to realize display with excellent color reproducibility. In addition, since the light transmitted through the yellow colored portion Y has a wavelength close to the peak of visibility, the human eye tends to perceive brightly even with a small amount of energy. Thereby, even if it suppresses the output of LED24 which the backlight apparatus 12 has, sufficient brightness
  • the display image of the liquid crystal panel 11 tends to be yellowish as a whole.
  • the chromaticity in the LED 24 is adjusted to a blue color that is a complementary color of yellow, thereby correcting the chromaticity in the display image.
  • the LED 24 of the backlight device 12 has the main emission wavelength in the blue wavelength region and the highest light emission intensity in the blue wavelength region. ing.
  • the area ratio of the blue colored portion B constituting the color filter 19 is set to be relatively larger than that of the green colored portion G and the yellow colored portion Y, whereby the color filter
  • the 19 transmitted light can contain more blue light which is a complementary color of yellow.
  • the inventors of the present application it has been found that when the four primary color type liquid crystal panel 11 is used, the brightness of the red light among the light emitted from the liquid crystal panel 11 is lowered. This is because, in the four primary color type liquid crystal panel 11, compared to the three primary color type, the number of subpixels constituting one pixel increases from three to four, so the area of each subpixel decreases. It is presumed that the brightness of the red light is particularly lowered due to this.
  • the area ratio of the red colored portion R constituting the color filter 19 is set to be relatively larger than that of the green colored portion G and the yellow colored portion Y, whereby the color filter
  • the transmitted light of 19 can contain a larger amount of red, and therefore, it is possible to suppress a decrease in lightness of the red light caused by the color filter 19 having four colors.
  • FIG. 6 is a cross-sectional view showing a cross-sectional configuration along the long side direction of the liquid crystal display device 10
  • FIG. 7 is an enlarged cross-sectional view of the liquid crystal display device 10 shown in FIG.
  • the backlight device 12 included in the liquid crystal display device 10 includes a reflection sheet 29 whose end portion protrudes outside the end surface 26 c of the light guide plate 26.
  • the reflection sheet 29 is formed by processing a single white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet).
  • the reflection sheet 29 includes a main body portion 29a laid on the bottom plate 22a of the chassis 22, and an upright portion 29b rising from an end portion of the main body portion 29a toward the front side of the liquid crystal display device 10 (backlight device 12).
  • the cover portion 29c extends from the standing portion 29b toward the end face 26b side of the light guide plate 26.
  • the reflection sheet 29 is bent at a boundary portion between the main body portion 29a and the standing portion 29b and at a boundary portion between the standing portion 29b and the cover portion 29c.
  • the reflection sheet 29 is provided with a broken line (not shown) on each boundary in order to make it easy to bend at these boundary portions. Note that a part of the main body portion 29 a, the standing portion 29 b, and the cover portion 29 c protrude beyond the end surface 26 b of the light guide plate 26.
  • the main body 29a has a rectangular shape and is accommodated in a box-shaped chassis 29 so as to cover the bottom plate 29a.
  • the light guide plate 26 is placed on the main body portion 29 a, and the main body portion 29 a covers the back surface 26 c of the light guide plate 26.
  • the end portion of the main body portion 29 a protrudes outside the end face 26 b of the light guide plate 26.
  • the protruding portion extends from the end face 26b of the light guide plate 26 toward the LED substrate 25, and this portion is particularly referred to as an extending portion 29d.
  • a standing portion 29b is provided at an end portion of the extending portion 29d on the LED substrate 25 side.
  • the standing portion 29b has a rectangular shape extending in the long side direction (X-axis direction) of the light guide plate 26, and extends along the mounting surface 25a (Z-axis direction) so as to cover the mounting surface 25a of the LED substrate 25.
  • the standing portion 29b is provided with a plurality of openings 29e.
  • the opening 29e is a rectangular hole penetrating the upstanding portion 29b, and is set slightly larger than the LED 24 mounted on the LED substrate 25.
  • each opening part 29e is fitted by each LED24, and LED24 is exposed from the opening part 29e.
  • the standing portion 29b is affixed to the mounting surface 25a of the LED substrate 25 via an adhesive such as a double-sided tape.
  • FIG. 8 is a perspective view of the reflection sheet 29 and the light source unit 2. In FIG. 8, for convenience of explanation, the reflection sheet 29 and the light source unit 2 are shown separated from each other.
  • the cover part 29c is provided so as to extend substantially horizontally from the end part located on the front side of the standing part 29b toward the end face 26b side of the light guide plate 26.
  • the front end of the cover portion 29 c is placed on the surface 26 a at the end portion of the light guide plate 26.
  • the end of the optical sheet 23 is placed on the tip of the cover portion 29 c, and the frame 27 is disposed on the end of the optical sheet 23.
  • the frame 27 is positioned by pressing the front end of the cover portion 29 c on the surface 26 a at the end of the light guide plate 26.
  • a gap D is formed between the end face 26b of the light guide plate 26 and the light exit face 24a at the tip of the LED 24.
  • the gap D is provided in advance so that the end face 26b of the light guide plate 26 does not contact the LED 24 when the light guide plate 26 is thermally expanded.
  • a cover portion 29c is disposed above the gap D (in the Z-axis direction), and the cover portion 29c covers the gap D from the front side (front surface 26a side) of the light guide plate 26. Since the cover part 29c consists of a part of reflective sheet 29, it has the function to reflect light.
  • the light L1 When the light L1 is emitted from the light exit surface 24a of the LED 24, the light L1 enters the light guide plate 26 from the end surface 26b of the light guide plate 26. Note that, among the light emitted from the light exit surface 24a, there is also light L2 that travels toward the upper side of the gap D without traveling toward the end surface 26b of the light guide plate 26. Such light L ⁇ b> 2 is reflected by the cover portion 29 c of the reflection sheet 29 disposed above the gap D, and becomes light L ⁇ b> 3 toward the end surface 26 d of the light guide plate 26.
  • the light L2 emitted from the light exit surface 24a passes between the light guide plate 26 and the frame 27 and is directed to the surface 26a side of the light guide plate 26.
  • the light L4 illuminates the back surface 11g of the disposed liquid crystal panel 11 locally and brightly. If the cover portion 29c is not provided, such light L4 is generated for each LED 24, and a locally brightly shining portion appears as luminance unevenness on the surface (display surface) 11g of the liquid crystal panel 11.
  • the backlight device 12 of the present embodiment is provided with the cover portion 29c so as to cover the upper portion of the gap D, and thus generation of such light L4 is suppressed. Further, the use efficiency of light emitted from the light exit surface 24a of the LED 24 (light incident efficiency on the end surface 26d of the light guide plate 26) is enhanced by the cover portion 29c.
  • the reflection sheet 29 of the present embodiment is formed in a frame shape in which the standing portion 29b surrounds each opening 29e, and with respect to each LED 24 mounted on the mounting surface 25a of the LED substrate 25. It is inserted. And as above-mentioned, the standing part 29b is affixed on the mounting surface 25a of the LED board 25 via the adhesive material. Therefore, the standing part 29b stands up with respect to the main body part 29a (extending part 29d) in a stable state. The rear end of the cover part 29c is connected to the standing part 29b in such a stable state, and the front end of the cover part 29c is sandwiched between the surface 26a and the frame 27 at the end part of the light guide plate 26. Therefore, the cover part 29 c can cover the gap D in a stable state from the front side of the light guide plate 26.
  • the cover portion 29c is configured as a part of the reflection sheet 29, an increase in the number of parts in the backlight device can be suppressed.
  • FIG. 9 is an enlarged cross-sectional view of the liquid crystal display device 10A according to the second embodiment.
  • the portion of the liquid crystal display device 10A shown in FIG. 9 corresponds to the portion of the liquid crystal display device 10 shown in FIG.
  • the basic configuration of the liquid crystal display device 10A of the present embodiment is the same as that of the first embodiment.
  • the liquid crystal display device 10A of the present embodiment is different from that of the first embodiment in the configuration (shape) of the reflection sheet 29A provided in the backlight device 12A.
  • the reflection sheet 29A is formed by processing a single white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet) as in the first embodiment, but the shapes of the extension part 29Ad, the standing part 29Ab, and the cover part 29Ac are the same. These are different from those of the first embodiment.
  • the cover portion 29Ac of the present embodiment covers the front side (front surface 26a side) of the light guide plate 26 so as to cover the gap D formed between the end surface 26b of the light guide plate 26 and the light exit surface 24a of the LED 24. However, it is inclined so as to rise from the light exit surface 24a side of the LED 24 toward the end surface 26b side of the light guide plate 26.
  • the standing portion 29Ab includes an opening 29Ae for exposing the light exit surface 24a of the LED 24, but the width in the standing direction (Z-axis direction) of the standing portion 29Ab is that of the first embodiment. Is set shorter.
  • the cover portion 29Ac covers the gap D from the front side of the light guide plate 26, so that light leaking from the gap D between the light guide plate 26 and the frame 27 is suppressed as in the first embodiment.
  • some of the light emitted from the light exit surface 24a of the LED 24 does not proceed directly toward the end surface 26b of the light guide plate 26, but proceeds toward the upper portion of the gap D like the light L5.
  • the cover portion 29Ac is inclined so as to rise from the light exit surface 24a side of the LED 24 toward the end surface 26b side of the light guide plate 26. Therefore, when such light L5 hits the inclined cover portion 29Ac.
  • the light L5 is easily reflected by the cover portion 29Ac and becomes light L6 directed toward the end face 26b of the light guide plate 26. That is, among the light emitted from the light exit surface 24a, even if the light L5 is initially largely deviated without going to the end surface 26b side, the light L5 is collected on the end surface 26b side by the inclined cover portion 29Ac of the present embodiment. Will be. Therefore, the light use efficiency is further enhanced by the cover portion 29Ac of the present embodiment. Similarly, the light use efficiency is enhanced by the inclined extending portion 29Ad.
  • FIG. 10 is an enlarged cross-sectional view of a liquid crystal display device 10B according to the third embodiment.
  • the portion of the liquid crystal display device 10B shown in FIG. 10 corresponds to the portion of the liquid crystal display device 10 shown in FIG.
  • the basic configuration of the liquid crystal display device 10B of the present embodiment is the same as that of the first embodiment.
  • the configuration of the reflection sheet 29B provided in the backlight device 10B is different from that of the first embodiment.
  • the portions other than the cover portion 29Bc are formed by processing a single white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet), as in the first embodiment.
  • the structure of the extension part 29Bd and the standing part 29Bb in the reflection sheet 29B is the same as that of the first embodiment.
  • the material of the cover portion 29Bc of the present embodiment is different from that of the first embodiment, and is made of a black resin sheet (an example of a light shielding material) having light shielding properties.
  • the cover portion 29 ⁇ / b> Bc of the present embodiment is also provided so as to cover the gap D from the front side of the light guide plate 26, as in the first embodiment.
  • the front end of the cover part 29Bc is sandwiched between the surface 26a at the end part of the light guide plate 26 and the frame 27, and the rear end of the cover part 29Bc is attached to the standing part 29Bb using an adhesive or the like. ing.
  • the light L2 emitted from the light exit surface 24a of the LED 24 toward the upper portion of the gap D hits the cover portion 29Bc as in the first embodiment, but the light L2 is mainly absorbed by the cover portion 29Bc. Is done. Since the light L2 is absorbed by the cover portion 29Bc, also in this embodiment, light leaking from the gap D between the light guide plate 26 and the frame 27 is suppressed as in the first embodiment.
  • the cover 29Bc may be made of not only a reflective material but also a light shielding material.
  • FIG. 11 is a perspective view of the reflection sheet 29C and the light source unit 2 used in the backlight device included in the liquid crystal display device according to the fourth embodiment.
  • the reflection sheet 29C and the light source unit 2 are shown separated from each other.
  • the basic configuration of the liquid crystal display device of this embodiment is the same as that of the first embodiment. However, in the liquid crystal display device of the present embodiment, the configuration of the reflective sheet 29C provided in the backlight device is different from that of the first embodiment.
  • the basic structure of the reflective sheet 29C of this embodiment is the same as that of the first embodiment, and is formed by processing a single white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet).
  • the configurations of the extending portion 29Cd and the standing portion 29Cb of the reflection sheet 29C are the same as those in the first embodiment.
  • an opening 29Ce for exposing the LED 24 is formed as in the first embodiment.
  • the reflective sheet 29C of the present embodiment is different from that of the first embodiment in that the cover portion 29Cc has a vent hole 29Cf.
  • a plurality of vent holes 29Cf are provided in the cover portion 29Cc. Note that the cover portion 29Cc of the present embodiment is divided into a plurality of portions by the vent holes 29Cf.
  • the cover part 29Cc of the present embodiment is formed by providing a vent hole Cf on the cover part 29c provided in the reflective sheet 29 of the first embodiment. That is, the cover portion 29Cc of the present embodiment is provided with a notch portion as the air hole Cf at a predetermined position of the cover portion 29c of the first embodiment.
  • the cover portion 29Cc is provided so as to cover the front of each LED 24 mounted on the mounting surface 25a of the LED substrate 25 at a predetermined interval. That is, the cover portion 29Cc of the present embodiment is provided so as to cover at least each gap formed between the light output surface 24a of each LED 24 and the end surface of the light guide plate from the front side of the light guide plate.
  • the light emitted from the light exit surface 24a of the LED 24 toward the upper portion of the gap is reflected by the cover portion 29Cc and travels toward the end surface of the light guide plate, as in the first embodiment. Therefore, also in the case of the present embodiment, as in the case of the first embodiment, light leaking from the gap between the light guide plate and the frame is suppressed.
  • the cover 29Cc is provided with a vent hole 29Cf. Therefore, even if the air in the space surrounded by the LED board 25, the end face of the light guide plate, the bottom plate of the chassis, the cover member 29Cc, and the like is warmed, the air in the space is passed through the vent hole 29Cc. It can be replaced with the air outside the (liquid crystal display device).
  • the air in the said space can be replaced using external air and vent hole 29Cr, the temperature rise in the said space can be suppressed. If the temperature rise in the space can be suppressed, thermal deformation or the like of the reflection sheet 29 of the cover portion 29Cc can be suppressed.
  • a foamed plastic sheet is used as the reflection sheet.
  • a metal foil, paper, or a general sheet having a metal foil formed on the surface of the paper is used.
  • a material that is used as a reflection sheet of a lighting device may be used.
  • the cover portion is provided along two long sides of the light guide plate. However, in other embodiments, the cover portion may be provided along only one long side of the light guide plate. Good.
  • the light exit surface is located at the tip of the LED.
  • a lens member or the like is provided on the light exit surface to emit light while diffusing light at a wide angle. It may be.
  • the cover portion made of the reflective material or the light shielding material is used.
  • the cover portion made of the reflective material and the cover portion made of the light shielding material are both used.
  • the provided reflection sheet may be used for one lighting device.
  • a cover made of a light shielding material attached to the inner surface of a cover made of a reflective material may be used as the cover. Good.
  • the arrangement order of the colored portions R, G, B, and Y in the color filter can be appropriately changed.
  • the present invention includes an arrangement in which the colored portion B, the green colored portion G, the red colored portion R, and the yellow colored portion Y are arranged in this order along the X-axis direction.
  • the colored portions R, G, B, and Y in the color filter are red colored portions R and green colored portions G from the left side of the drawing.
  • the present invention also includes an arrangement in which the yellow colored portion Y and the blue colored portion B are arranged in this order along the X-axis direction.
  • the colored portions R, G, B, and Y in the color filter are red colored portions R and yellow from the left side of the drawing.
  • the present invention also includes an arrangement in which the colored portion Y, the green colored portion G, and the blue colored portion B are arranged in this order along the X-axis direction.
  • the three primary colors of light, red (R), green (G), and blue (B) are added to yellow (Y) as the colored portion of the color filter.
  • Y yellow
  • a cyan colored portion C may be added instead of the yellow colored portion.
  • the color filter has four colored portions.
  • the transparent color does not color transmitted light at the installation position of the yellow colored portion.
  • the portion T may be provided.
  • the transparent portion T has substantially the same transmittance for all wavelengths at least in the visible light, so that the transmitted light is not colored into a specific color.
  • the four colored portions R, G, B, and Y constituting the color filter are illustrated as being arranged along the row direction.
  • G, B, and Y may be arranged in a matrix.
  • the four colored portions R, G, B, and Y are arranged in a matrix with the X-axis direction as the row direction and the Y-axis direction as the column direction, although the dimensions in the row direction (X-axis direction) in each of the colored portions R, G, B, and Y are all the same, the colored portions R, G, B, and Y arranged in adjacent rows are in the column direction (Y The dimensions in the axial direction are different from each other.
  • the red colored portion R and the blue colored portion B are arranged adjacent to each other in the row direction, whereas the row having a relatively small size in the column direction.
  • the green colored portion G and the yellow colored portion Y are arranged adjacent to each other in the row direction.
  • the first colored row R and the blue colored portion B are alternately arranged in the row direction, the first row having a relatively large dimension in the column direction, the green colored portion G, and the yellow colored portion Y.
  • second rows having relatively small dimensions in the column direction are alternately arranged in the column direction.
  • the area of the red coloring part R and the blue coloring part B is made larger than the areas of the green coloring part G and the yellow coloring part Y. Further, the green colored portion G is arranged adjacent to the red colored portion R in the column direction, and the yellow colored portion Y is arranged adjacent to the blue colored portion B in the column direction. Yes.
  • the dimensions in the column direction of the pixel electrodes 115 arranged in adjacent rows are different as shown in FIG. That is, the area of each pixel electrode 115 that overlaps with the red colored portion R or the blue colored portion B is larger than the area of the pixel electrode 115 that overlaps with the yellow colored portion Y or the green colored portion G. .
  • the film thicknesses of the colored portions R, G, B, and Y are all equal.
  • the source wirings 117 are all arranged at an equal pitch, while the gate wirings 116 are arranged at two different pitches according to the dimensions of the pixel electrodes 115 in the column direction. 17 and 18 show a case where the areas of the red colored portion R and the blue colored portion B are about 1.6 times the areas of the yellow colored portion Y and the green colored portion G. Show.
  • the yellow colored portion Y is arranged adjacent to the red colored portion R in the column direction with respect to the color filter. It is also possible to adopt a configuration in which the green colored portion G is arranged adjacent to the colored portion B in the column direction.
  • the color portions R, G, B, and Y constituting the color filter are illustrated with different area ratios.
  • the areas of the colored portions R, G, B, and Y are exemplified. It is also possible to adopt a configuration in which the ratio is made equal.
  • the colored portions R, G, B, and Y are arranged in a matrix with the X-axis direction as the row direction and the Y-axis direction as the column direction.
  • the dimensions in the row direction (X-axis direction) in R, G, B, and Y are all the same, and the dimensions in the column direction (Y-axis direction) are all the same.
  • the areas of the colored portions R, G, B, and Y are all equal.
  • the color filter is configured as described above, in the array substrate, as shown in FIG. 21, the dimension in the row direction of each pixel electrode 215 facing each colored portion R, G, B, Y is shown. Are all equal and the dimensions in the column direction are all equal, so that all the pixel electrodes 215 have the same shape and the same area.
  • the gate wiring 216 and the source wiring 217 are all arranged at an equal pitch.
  • the color filter has four colored portions. However, as shown in FIG. 22, the yellow colored portion is omitted, and red (R), which is the primary color of light. , Green (G), and blue (B) are also included in the present invention. In this case, it is preferable to make the area ratios of the colored portions R, G, and B equal.
  • the structure related to the pixel has been described using the simplified drawings (FIGS. 4 and 5). However, in addition to the structure disclosed in these drawings, the specific structure related to the pixel is changed. Is possible.
  • the present invention can also be applied to a structure in which one pixel is divided into a plurality of sub-pixels and the sub-pixels are driven so as to have different gradation values, so-called multi-pixel driving is performed.
  • one pixel PX is composed of a pair of subpixels SPX
  • the pair of subpixels SPX is composed of a pair of adjacent pixel electrodes with the gate wiring 102 interposed therebetween. 100.
  • the TFT 101 includes a gate electrode 101a constituted by a part of the gate wiring 102, a source electrode 101b constituted by a pair of branch lines branched from the source wiring 103 and disposed on the gate electrode 101a, and the gate electrode 101a. And a drain electrode 101c arranged between the pair of source electrodes 101b, and arranged in the direction (Y-axis direction) of the pair of sub-pixels SPX forming one pixel PX on the gate wiring 102. A pair is lined up along.
  • the drain electrode 101c of the TFT 101 is connected to the other end side of the drain wiring 104 having a contact portion 104a connected to the pixel electrode 100 on one end side.
  • the contact portion 104a and the pixel electrode 100 are connected through a contact hole CH formed in an interlayer insulating film (not shown) interposed therebetween, and have the same potential.
  • the auxiliary capacitance wiring 105 is arranged at the end opposite to the gate wiring 102 side so as to overlap each other in plan view, and the pixel on which the auxiliary capacitance wiring 105 overlaps. A capacitance is formed with the electrode 100.
  • the pair of pixel electrodes 100 constituting one pixel PX forms a capacitance with different auxiliary capacitance lines 105.
  • Each in-pixel auxiliary capacitance line 108 is connected to each auxiliary capacitance line 105 arranged on the side opposite to the gate line 101 side by a connection line 109, thereby having the same potential as each auxiliary capacitance line 105. ing.
  • the in-pixel auxiliary capacitance line 108 having the same potential as that of the auxiliary capacitance line 105 is superimposed on the plane and forms a capacitance with each contact portion 104a having the same potential as each pixel electrode 100.
  • the scanning signal and the data signal are supplied from the common gate wiring 102 and the source wiring 103 to the pair of TFTs 101, respectively, while the pair of pixel electrodes 100 and the pair of contact portions connected thereto.
  • the voltage value charged to each sub-pixel SPX, that is, the gradation value is different from each other.
  • so-called multi-pixel driving can be performed, and good viewing angle characteristics can be obtained.
  • the coloring portions R, G, B, and Y of the color filter 106 that faces the pixel electrode 100 and the pixel electrode 100 are as follows. It is supposed to be configured. That is, as shown in FIG. 24, the color filter 106 includes four colored portions R, G, B, and Y. From the left side of the drawing, the yellow colored portion Y, the red colored portion R, and the green colored portion. G and blue colored portion B are repeatedly arranged in parallel along the X-axis direction in this order. Each of the colored portions R, G, B, and Y is partitioned by a light shielding layer (black matrix) 107.
  • black matrix black matrix
  • the light shielding layer 107 overlaps with the gate wiring 102, the source wiring 103, and the auxiliary capacitance wiring 105 in a plan view. Are arranged in a substantially lattice pattern.
  • the yellow colored portion Y and the green colored portion G have substantially the same dimensions in the X-axis direction (the parallel direction of the colored portions R, G, B, and Y).
  • the red colored portion R and the blue colored portion B are relatively larger in dimensions in the X-axis direction than the yellow colored portion Y and the green colored portion G (for example, 1.3 times to 1). About 4 times).
  • the red colored portion R has a slightly larger dimension in the X-axis direction than the blue colored portion B.
  • each pixel electrode 100 has substantially the same size in the Y-axis direction, but the size in the X-axis direction has the colored portions R, G, B of the color filter 106 facing each other. , Y corresponding to the size of Y.

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Abstract

L'invention porte sur un dispositif d'éclairage (10), qui comporte : une pluralité de sources de lumière à DEL (24) ayant des surfaces d'émission de lumière (24a) ; une plaque de guidage de lumière (26), qui, à partir de la surface de plaque endroit (26a) jusqu'à l'extérieur, émet une lumière entrant à l'intérieur de celle-ci à partir d'une surface d'extrémité (26b) ; un substrat de DEL (25) sur lequel sont montées les sources de lumière à DEL (24) et qui est disposé de manière telle que les surfaces d'émission de lumière (24a) des sources de lumière à DEL montées (24) font face à la surface d'extrémité (26b) ; et une feuille réfléchissante (29), qui est une feuille (29) ayant une forme qui s'incurve de manière à atteindre, à partir de la surface de plaque envers (26c) de la plaque de guidage de lumière (26), la surface de plaque endroit (26a), et qui recouvre un espace (D) formé entre la surface d'extrémité (26b) et les surfaces d'émission de lumière (24a) à partir de l'endroit de la plaque de guidage de lumière (26).
PCT/JP2012/063155 2011-05-30 2012-05-23 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Ceased WO2012165249A1 (fr)

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JP2014137997A (ja) * 2013-01-15 2014-07-28 Lg Innotek Co Ltd 回路基板及び回路基板を含むフラットパネルディスプレイ
US11187848B2 (en) * 2018-05-31 2021-11-30 Panasonic Intellectual Property Management Co., Ltd. Image display device

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JPH08146232A (ja) * 1994-03-23 1996-06-07 Tosoh Corp バックライト
JP2006310221A (ja) * 2005-05-02 2006-11-09 Matsushita Electric Ind Co Ltd エッジ入力型バックライト及び液晶表示装置
JP2009026614A (ja) * 2007-07-19 2009-02-05 Citizen Electronics Co Ltd 面発光装置及び表示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014137997A (ja) * 2013-01-15 2014-07-28 Lg Innotek Co Ltd 回路基板及び回路基板を含むフラットパネルディスプレイ
US11187848B2 (en) * 2018-05-31 2021-11-30 Panasonic Intellectual Property Management Co., Ltd. Image display device

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