WO2016140209A1 - Dispositif d'éclairage, dispositif d'affichage, et récepteur de télévision - Google Patents

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

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Publication number
WO2016140209A1
WO2016140209A1 PCT/JP2016/056187 JP2016056187W WO2016140209A1 WO 2016140209 A1 WO2016140209 A1 WO 2016140209A1 JP 2016056187 W JP2016056187 W JP 2016056187W WO 2016140209 A1 WO2016140209 A1 WO 2016140209A1
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WIPO (PCT)
Prior art keywords
light
led
rising
emission amount
light source
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PCT/JP2016/056187
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English (en)
Japanese (ja)
Inventor
健太郎 鎌田
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シャープ株式会社
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Publication of WO2016140209A1 publication Critical patent/WO2016140209A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • the liquid crystal display device described in Patent Document 1 includes a liquid crystal panel and a display backlight unit that irradiates light to the liquid crystal panel.
  • the display backlight unit includes a primary light source, a light guide plate that guides primary light emitted by the primary light source, and a QD phosphor material that emits secondary light when excited by the primary light guided by the light guide plate. Including a QD film.
  • the direct type backlight device has a configuration in which a large number of light sources are arranged in a position directly below the liquid crystal panel, but the distribution of the amount of light related to the primary light in the backlight device is high at the center of the screen. It tends to be lower on the outer periphery side of the screen.
  • the ratio of the primary light in the emitted light of the backlight device and the secondary light converted by the QD film tends to be different between the screen center side and the screen outer peripheral side, There was a risk of uneven color.
  • the present invention has been completed based on the above situation, and an object thereof is to suppress the occurrence of color unevenness.
  • the illuminating device of the present invention is disposed apart from the light-emitting side in a shape opposite to the light-emitting surface of the light source and a plurality of light sources arranged side by side along the bottom surface of the chassis.
  • a reflection member having at least a bottom reflection part, a rising reflection part rising from the bottom reflection part toward the wavelength conversion member side, and a light source control part for controlling a light emission amount per unit time in the plurality of light sources And among the plurality of light sources, the light emission amount related to the light source arranged on the end side in the plane of the bottom-side reflecting portion is larger than the light emission amount related to the light source arranged on the center side. Control to increase Comprising a light source control unit.
  • the light emitted from the light source will be reflected by the reflecting member, and will be contained in the wavelength conversion member that is arranged away from the light emitting side so as to face the light emitting surface of the light source.
  • the wavelength is converted by the phosphor and emitted.
  • the light sources per unit time of the plurality of light sources arranged along the bottom surface of the chassis are controlled by the light source control unit.
  • the light source disposed on the end side in the plane of the bottom-side reflecting unit is controlled by the light source control unit so that the light emission amount per unit time is relatively larger than the light source disposed on the center side. Therefore, more light from the light source can be supplied to the rising reflection portion.
  • the light source control unit supplies a pulse signal to the plurality of light sources, and controls a light emission amount per unit time by adjusting a time ratio between a lighting period and a light-off period in the plurality of light sources. It is said. In this way, the dynamic range related to the light emission amount per unit time in the plurality of light sources becomes sufficiently wide.
  • the light source control unit controls the light emission amount per unit time by driving the plurality of light sources at a constant current and changing the current values supplied to the plurality of light sources. In this way, it is possible to easily reduce the cost when controlling the light emission amount per unit time in a plurality of light sources. Also, noise is less likely to occur when controlling the light emission amount.
  • the light source control unit is disposed on an end side in the plane of the bottom-side reflection unit, and the light emission amount related to the light source relatively disposed near the rising reflection unit is Control is performed so as to be larger than the light emission amount of the light source that is disposed on the end side in the plane of the reflection portion and relatively disposed far from the rising reflection portion. In this way, more light can be supplied to the rising tip side of the rising reflecting portion than to the rising proximal side. As a result, the light from the light source, which tends to be deficient in the reflected light from the rising reflecting portion, can be compensated with an appropriate in-plane distribution, so that the reflected light and the reflected light from the bottom reflecting portion are colored. The difference is less likely to occur.
  • the light source control unit controls the light emission amounts of the plurality of light sources arranged on the end side in the plane of the bottom-side reflection unit so as to gradually increase toward the rising reflection unit.
  • the rising reflecting portion is inclined with respect to the bottom reflecting portion and has a relatively small inclination angle, and a second rising reflection with a relatively large inclination angle.
  • the light source control unit is configured to emit the light emission related to the light source that is arranged near the first rising reflection unit in the plane of the bottom reflection unit among the plurality of light sources. The amount is controlled to be larger than the light emission amount related to the light source arranged near the second rising reflection portion. In the first rising reflection portion, the amount of light from the light source is reduced and the wavelength conversion efficiency of the light by the wavelength conversion member accompanying multiple reflection tends to be higher than that in the second rising reflection portion.
  • the light emission amount related to the light source arranged near the first rising reflection portion in the plane of the bottom reflection portion is larger than the light emission amount related to the light source arranged near the second rise reflection portion. Since it is controlled by the light source control unit, the color unevenness that may occur in the first rising reflection unit can be suitably mitigated.
  • the light emission amount related to the light source arranged near the second rising reflection unit in the plane of the bottom side reflection unit is related to the light source arranged on the center side.
  • the amount of light emission is controlled to be larger.
  • the light source control unit controls the light emission amount related to the light source arranged near the second rising reflection unit in the plane of the bottom side reflection unit to be larger than the light emission amount related to the light source arranged on the center side.
  • the light source control unit relates to the light emission amount related to the light source arranged in the vicinity of the second rising reflection unit in the plane of the bottom side reflection unit, and the light source arranged on the center side.
  • the light emission amount is controlled to be equal. For example, if the inclination angle of the second rising reflecting portion with respect to the bottom reflecting portion becomes sufficiently large, the color unevenness that may occur in the second rising reflecting portion may be within an allowable range.
  • the light source control unit controls the light emission amount related to the light source arranged near the second rising reflection unit in the plane of the side reflection unit to be equal to the light emission amount related to the light source arranged on the center side. Is preferred.
  • the light source emits blue light
  • the wavelength conversion member includes a green phosphor that converts the wavelength of the blue light into green light as the phosphor, and the blue light. And at least a red phosphor that converts the wavelength of the light into red light.
  • the wavelength conversion efficiency of the light by the wavelength conversion member is increased, and there is a concern that the ratio of green light to red light is increased, the reflected light A difference is less likely to occur between the color and the color of the reflected light from the bottom-side reflection part. Therefore, color unevenness hardly occurs in the light emitted from the illumination device.
  • the wavelength conversion member contains a quantum dot phosphor as the phosphor. If it does in this way, while the wavelength conversion efficiency of the light by a wavelength conversion member will become higher, the color purity of the wavelength-converted light will become high.
  • a display device of the present invention is a display device including the above-described illumination device and a display panel that displays an image using light emitted from the illumination device. According to the display device having such a configuration, since the light emitted from the illumination device is suppressed from occurrence of color unevenness, a display with excellent display quality can be realized.
  • the television receiver of the present invention is a television receiver provided with the display device described above. According to such a television receiving apparatus, since the display quality of the display device is excellent, it is possible to realize display of a television image with excellent display quality.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
  • the exploded perspective view which shows schematic structure of the liquid crystal display device with which a television receiver is equipped Plan view of a backlight device provided in a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device
  • An enlarged plan view near the corner of the backlight device Vii-vii sectional view of FIG. Viii-viii sectional view of FIG.
  • a circuit diagram showing a circuit configuration for driving each LED Graph showing the lighting period and extinguishing period of each LED The top view which expanded the corner vicinity of the backlight apparatus which concerns on Embodiment 2 of this invention.
  • a circuit diagram showing a circuit configuration for driving each LED Graph showing the lighting period and extinguishing period of each LED The top view which expanded the corner vicinity of the backlight apparatus which concerns on Embodiment 3 of this invention.
  • a circuit diagram showing a circuit configuration for driving each LED Graph showing the lighting period and extinguishing period of each LED The graph showing the lighting period and light extinction period of each LED which concern on Embodiment 4 of this invention The top view which expanded the corner vicinity of the backlight apparatus which concerns on Embodiment 5 of this invention.
  • FIGS. 1 A first embodiment 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 FIGS. 4 and 5 is the front side, and the lower side is the back side.
  • the television receiver 10TV receives a liquid crystal display device 10, front and back cabinets 10Ca and 10Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power supply 10P, and a television signal. And a tuner (reception unit) 10T and a stand 10S.
  • the liquid crystal display device (display device) 10 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole and is accommodated in a vertically placed state.
  • the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel that displays an image, and a backlight device (illumination device) that is an external light source that supplies light for display to the liquid crystal panel 11. 12 and these are integrally held by a frame-like bezel 13 or the like.
  • the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described sequentially.
  • the liquid crystal panel (display panel) 11 has a horizontally long rectangular shape when seen in a plan view, and a pair of glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal is formed between both glass substrates. It is set as the enclosed structure.
  • a switching element for example, TFT
  • a pixel electrode connected to the switching element, an alignment film, etc.
  • the other glass substrate (counter substrate, CF substrate) has a color filter or counter electrode in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, Furthermore, an alignment film or the like is provided. A polarizing plate is disposed outside each of the glass substrates.
  • the backlight device 12 includes a substantially box-shaped chassis 14 having a light emitting portion 14 b that opens on the front side (light emitting side, liquid crystal panel 11 side), and a light emitting portion 14 b of the chassis 14. And an optical member 15 disposed so as to cover the frame, and a frame 16 disposed along the outer edge portion of the chassis 14 and holding the outer edge portion of the optical member 15 between the chassis 14 and the frame 16. Furthermore, in the chassis 14, an LED (light source) 17, an LED substrate 18 on which the LED 17 is mounted, and a reflection sheet (reflecting member) 19 that reflects the light in the chassis 14 are provided.
  • the backlight device 12 is a so-called direct type in which the LED 17 is arranged in the chassis 14 immediately below the liquid crystal panel 11 and the optical member 15 and the light emitting surface 17a is opposed.
  • the LED 17 is arranged in the chassis 14 immediately below the liquid crystal panel 11 and the optical member 15 and the light emitting surface 17a is opposed.
  • the chassis 14 is made of, for example, a metal plate such as an aluminum plate or an electrogalvanized steel plate (SECC). As shown in FIGS. 3 to 5, the chassis 14 has a horizontally long rectangular shape (rectangular shape, rectangular shape) like the liquid crystal panel 11. A bottom plate portion (bottom portion) 14a, and a side plate portion (side portion) 14c rising from the outer end of each side (a pair of long sides and a pair of short sides) toward the front side (light emission side), respectively. And a receiving plate portion (receiving portion) 14d projecting outward from the rising end of each side plate portion 14c, and as a whole has a shallow substantially box shape (substantially shallow dish shape) that opens toward the front side. .
  • SECC electrogalvanized steel plate
  • the long side direction of the chassis 14 matches the X-axis direction, and the short side direction matches the Y-axis direction.
  • the bottom plate portion 14a of the chassis 14 is disposed on the back side of the LED substrate 18, that is, on the opposite side of the LED 17 from the light emitting surface 17a side (light emitting side).
  • Each side plate portion 14c in the chassis 14 is inclined with respect to the bottom plate portion 14a.
  • a frame 16 and an optical member 15 to be described below can be placed on each receiving plate portion 14d of the chassis 14 from the front side.
  • a frame 16 is fixed to each receiving plate portion 14d.
  • the optical member 15 has a horizontally long rectangular shape when viewed in a plane, like the liquid crystal panel 11 and the chassis 14. As shown in FIGS. 4 and 5, the optical member 15 has an outer edge portion placed on the receiving plate portion 14 d so as to cover the light emitting portion 14 b of the chassis 14 and be interposed between the liquid crystal panel 11 and the LED 17. Arranged. The optical member 15 is opposed to the light emitting surface 17a of the LED 17 at a predetermined interval on the front side, that is, on the light emitting side.
  • the optical member 15 includes a diffusion plate 15a disposed on the back side (the LED 17 side, opposite to the light emitting side) and an optical sheet 15b disposed on the front side (the liquid crystal panel 11 side, the light emitting side).
  • the diffusing plate 15a has a structure in which a large number of diffusing particles are dispersed in a substantially transparent resin base material having a predetermined thickness, and has a function of diffusing transmitted light.
  • the optical sheet 15b has a sheet shape that is thinner than that of the diffusion plate 15a.
  • the optical sheet 15b is arranged in three layers, in which light emitted from the LED 17 is converted to light of other wavelengths. And a wavelength conversion sheet (wavelength conversion member) 20 for wavelength conversion.
  • the optical sheet 15 b includes a wavelength conversion sheet 20, a prism sheet 21 stacked on the front side of the wavelength conversion sheet 20, and a reflective polarizing sheet 22 stacked on the front side of the prism sheet 21.
  • the wavelength conversion sheet 20 will be described in detail later.
  • the prism sheet 21 has a base material and a prism portion provided on the front plate surface of the base material, and the prism portion of the prism sheet 21 extends along the X-axis direction and extends in the Y-axis direction. It is composed of unit prisms that are arranged alongside each other. With such a configuration, the prism sheet 21 selectively collects light (difference) in the Y-axis direction (unit prism arrangement direction, direction orthogonal to the unit prism extension direction) on the light from the wavelength conversion sheet 20. (Concentrated light collecting action).
  • the reflective polarizing sheet 22 includes a reflective polarizing film and a pair of diffusion films that sandwich the reflective polarizing film from the front and back.
  • the reflective polarizing film has, for example, a multilayer structure in which layers having different refractive indexes are alternately laminated, and has a configuration that transmits p-waves of light from the prism sheet 21 and reflects s-waves to the back side. ing.
  • the s wave reflected by the reflective polarizing film is reflected again to the front side by a reflection sheet 19 or the like described later, and at that time, separated into an s wave and a p wave.
  • the reflective polarizing sheet 22 includes the reflective polarizing film, so that the s-wave absorbed by the polarizing plate of the liquid crystal panel 11 is reflected to the back side (the reflective sheet 19 side).
  • the pair of diffusion films are made of a synthetic resin material such as polycarbonate, and are embossed on a plate surface opposite to the reflective polarizing film side to impart a diffusing action to light.
  • the frame 16 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 15. An outer edge portion of the optical member 15 can be sandwiched between the frame 16 and each receiving plate portion 14d (FIGS. 4 and 5).
  • the frame 16 can receive the outer edge portion of the liquid crystal panel 11 from the back side, and can sandwich the outer edge portion of the liquid crystal panel 11 with the bezel 13 disposed on the front side (FIGS. 4 and 5). ).
  • the LED 17 and the LED board 18 on which the LED 17 is mounted will be described.
  • the LED 17 is surface-mounted on the LED substrate 18 and has a light emitting surface 17 a facing the side opposite to the LED substrate 18 side, which is a so-called top-emitting type.
  • the optical axis coincides with the Z-axis direction, that is, the normal direction to the display surface of the liquid crystal panel 11 (the plate surface of the optical member 15).
  • the “optical axis” referred to here is an axis that coincides with the traveling direction of light having the highest light emission intensity (peak) among the light emitted from the LED 17. Specifically, as shown in FIGS.
  • the LED 17 is formed by sealing a blue LED element (blue light emitting element, blue LED chip), which is a light source, in a case with a sealing material. . That is, the LED 17 is a blue LED that emits blue monochromatic light. A part of the blue light emitted from the LED 17 is wavelength-converted into green light or red light by a wavelength conversion sheet 20 described in detail later. By the additive color mixture of light and red light and the blue light of the LED 17, the light emitted from the backlight device 12 is substantially white.
  • a blue LED element blue light emitting element, blue LED chip
  • the blue LED element provided in the LED 17 is a semiconductor made of a semiconductor material such as InGaN, for example, and is blue monochromatic light having a wavelength included in a blue wavelength region (about 420 nm to about 500 nm) when a voltage is applied in the forward direction. Is supposed to emit light. That is, the light emitted from the LED 17 is monochromatic light having the same color as the light emitted from the blue LED element.
  • This blue LED element is connected to a wiring pattern on the LED substrate 18 arranged outside the case by a lead frame (not shown).
  • the LED substrate 18 has a slightly vertical shape (rectangular shape, rectangular shape), the long side direction matches the Y-axis direction, and the short side direction matches the X-axis direction. In the state, it is accommodated in the chassis 14 while extending along the bottom plate portion 14a.
  • the base material of the LED substrate 18 is made of the same metal as the chassis material such as the chassis 14, 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.
  • the outermost surface has a configuration in which a white reflective layer (not shown) is formed.
  • insulating materials such as a ceramic, can also be used as a ceramic.
  • the LED 17 having the above-described configuration is surface-mounted on the plate surface facing the front side (the plate surface facing the optical member 15 side) among the plate surfaces of the base material of the LED substrate 18, and this is the mounting surface 18a. It is said.
  • the LEDs 17 are arranged in parallel in a matrix (matrix, grid) in the surface of the mounting surface 18a of the LED substrate 18, and by a wiring pattern formed in the surface of the mounting surface 18a. They are electrically connected to each other.
  • a matrix matrix
  • the LEDs 17 are arranged in parallel in a matrix (matrix, grid) in the surface of the mounting surface 18a of the LED substrate 18, and by a wiring pattern formed in the surface of the mounting surface 18a. They are electrically connected to each other.
  • the mounting surface 18a of the LED substrate five pieces (relatively few) along the long side direction (Y-axis direction) along the short side direction (X-axis direction).
  • Six (relatively large) LEDs 17 are arranged in a matrix.
  • the LED boards 18 having the above-described configuration are arranged in parallel in the chassis 14 in a state where the long side direction and the short side direction are aligned with each other along the X axis direction and the Y axis direction.
  • the LED boards 18 are arranged in the chassis 14 by four pieces (relatively large numbers) along the X-axis direction and by two pieces (relatively small numbers) along the Y-axis direction.
  • the arrangement directions thereof coincide with the X-axis direction and the Y-axis direction, respectively.
  • the arrangement interval between the LED substrates 18 adjacent to each other in the X-axis direction and the Y-axis direction is substantially constant.
  • the LEDs 17 are arranged in a line so as to be arranged in a matrix so as to be substantially equally spaced in the X axis direction (row direction) and the Y axis direction (column direction). Specifically, 20 LEDs 17 along the long side direction (X-axis direction) and 12 LEDs 17 along the short side direction (Y-axis direction) in the plane of the bottom plate portion 14a of the chassis 14 are arranged in a matrix. They are arranged in a plane in a line.
  • the optical member 15 disposed so as to cover the light emitting portion 14b of the chassis 14 is disposed in an opposing manner with respect to all of the LEDs 17 group with a predetermined interval.
  • Each LED board 18 is provided with a connector portion to which a wiring member (not shown) is connected so that driving power is supplied from the LED driving board (light source driving board, light source control board) 23 via the wiring member. (See FIG. 9).
  • the circuit configuration for driving the LED 17 will be described later.
  • the reflection sheet 19 is made of a synthetic resin and has a white surface with excellent light reflectivity.
  • the reflection sheet 19 does not absorb light of a specific wavelength on the surface thereof, and diffusely reflects all visible rays, and the light reflectance is substantially constant over the entire area.
  • the reflection sheet 19 has a size that is laid over almost the entire inner surface of the chassis 14, so that the LED board 18 disposed in the chassis 14 is almost entirely on the front side. It is possible to cover from (light emitting side, optical member 15 side).
  • the reflection sheet 19 can reflect the light in the chassis 14 toward the front side (light emission side, optical member 15 side).
  • the reflection sheet 19 extends along the LED substrate 18 (bottom plate portion 14a), and each of the bottom-side reflection portion 19a and the bottom-side reflection portion 19a have a size that covers each LED substrate 18 in a lump.
  • Four rising reflecting portions 19b that rise from the outer end to the front side and are inclined with respect to the bottom reflecting portion 19a, and extend outward from the outer ends of the respective rising reflecting portions 19b and receive plate portions 14d of the chassis 14 It is comprised from the extension part 19c mounted on.
  • the bottom reflection part 19 a of the reflection sheet 19 is arranged so as to overlap the front side of each LED substrate 18, that is, the mounting surface 18 a of the LED 17.
  • an LED insertion hole (light source insertion hole) 19 d through which each LED 17 is individually inserted is provided in the bottom side reflection portion 19 a of the reflection sheet 19 at a position overlapping with each LED 17 in plan view.
  • a plurality of the LED insertion holes 19d are arranged in parallel in a matrix (matrix shape) in the X-axis direction and the Y-axis direction corresponding to the arrangement of the LEDs 17.
  • the rising reflecting portion 19b includes a pair of short side rising reflecting portions (first rising reflecting portions) 19bS rising from both outer ends on the short side of the bottom reflecting portion 19a, and bottom reflecting
  • the portion 19a includes a pair of long-side rising reflection portions (second rising reflection portions) 19bL rising from both outer ends on the long side.
  • the short-side rising reflecting portion 19bS has a relatively small inclination angle with respect to the bottom-side reflecting portion 19a, and has a relatively gentle gradient.
  • the short-side rising reflecting portion 19bS has a relatively long linear distance from the rising base end position to the rising tip position. Therefore, the amount of light emitted from the LED 17 and reflected by the short-side rising reflection portion 19bS is relatively small, and after being raised by the short-side rising reflection portion 19bS, returned by the optical member 15. The emitted light tends to be relatively easily subjected to multiple reflection at the short-side rising reflection portion 19bS.
  • the long-side rising reflection portion 19bL has a relatively large inclination angle with respect to the bottom-side reflection portion 19a, and has a relatively steep slope.
  • the long-side rising reflection portion 19bL has a relatively short linear distance from the rising base end position to the rising tip position. Accordingly, the amount of light emitted from the LED 17 and reflected by the long-side rising reflection portion 19bL is relatively increased, and after being raised by the long-side rising reflection portion 19bL, by the optical member 15. The returned light tends to be relatively difficult to be multiple-reflected by the long-side rising reflection portion 19bL.
  • the wavelength conversion sheet 20 includes a phosphor layer (wavelength conversion layer) containing a phosphor for converting the wavelength of light from the LED 17 (wavelength conversion material), and a pair of the phosphor layers sandwiched from the front and back to protect it. And a protective layer.
  • the phosphor layer includes a red phosphor that emits red light (visible light in a specific wavelength region belonging to red) using blue monochromatic light (primary light) from the LED 17 as excitation light, and green (specific belonging to green). And a green phosphor that emits light in the visible wavelength range).
  • the wavelength conversion sheet 20 converts the wavelength of the blue light (primary light) from the LED 17 to emit yellow light as a secondary light, that is, light of a color that is a complementary color of the primary light.
  • the “yellow light” mentioned here includes light in the wavelength region belonging to yellow (about 570 nm to about 600 nm) as well as light in the wavelength region belonging to green (emitted from the green phosphor). Also included is a combination of green light) and light in the wavelength region belonging to red (red light emitted from the red phosphor).
  • each of the phosphors of each color contained in the phosphor layer has blue excitation light and has the following emission spectrum. That is, the green phosphor emits blue light as excitation light and emits light in a wavelength region (about 500 nm to about 570 nm) belonging to green, that is, green light as fluorescence light.
  • the green phosphor preferably has an emission spectrum in which the peak wavelength of the peak is about 530 nm in the wavelength range of green light and the half width of the peak is less than 40 nm.
  • the red phosphor emits blue light as excitation light and emits light in a wavelength region (about 600 nm to about 780 nm) belonging to red, that is, red light as fluorescent light.
  • the red phosphor preferably has an emission spectrum in which the peak wavelength of the peak is about 610 nm within the wavelength range of red light, and the half width of the peak is less than 40 nm.
  • the phosphors of the respective colors are of the down conversion type (down shifting type) in which the excitation wavelength is shorter than the fluorescence wavelength.
  • This down-conversion type phosphor is supposed to convert excitation light having a relatively short wavelength and high energy into fluorescence light having a relatively long wavelength and low energy. Therefore, the quantum efficiency (light conversion efficiency) is 30% to 30% higher than when using an up-conversion type phosphor whose excitation wavelength is longer than the fluorescence wavelength (quantum efficiency is about 28%, for example). It is about 50% and higher.
  • Each color phosphor is a quantum dot phosphor (Quantum Dot Phosphor).
  • Quantum dot phosphors have discrete energy levels by confining electrons, holes, and excitons in all three-dimensional space in a nano-sized semiconductor crystal (for example, about 2 nm to 10 nm in diameter) By changing the size of the dots, the peak wavelength (emission color) of emitted light can be appropriately selected.
  • the emission light (fluorescence light) of the quantum dot phosphor has a sharp peak in the emission spectrum and a narrow half width, so that the color purity is extremely high and the color gamut is wide.
  • a material of the quantum dot phosphor As a material of the quantum dot phosphor, a combination of Zn, Cd, Hg, Pb or the like that becomes a divalent cation and O, S, Se, Te, or the like that becomes a divalent anion (CdSe (selenization) (Cadmium), ZnS (Zinc Sulfide), etc.)
  • a material InP (Indium Phosphide), GaAs) that combines trivalent cation Ga, In, etc. with trivalent anion P, As, Sb, etc. (Gallium arsenide) and the like) and chalcopyrite type compounds (CuInSe 2 and the like).
  • the quantum dot phosphor used in the present embodiment is a so-called core-shell type quantum dot phosphor.
  • the core-shell type quantum dot phosphor has a configuration in which the periphery of the quantum dot is covered with a shell made of a semiconductor material having a relatively large band gap.
  • the direct type backlight device 12 a large number of LEDs 17 are arranged side by side at a position directly below the liquid crystal panel 11, but the light emitted from the LEDs 17 in the backlight device 12.
  • the distribution of the amount of light related to the primary light tends to be high on the screen center side and low on the screen outer periphery side. This is mainly because the arrangement area of the LEDs 17 in the backlight device 12 is limited to only the bottom reflection part 19a of the reflection sheet 19, and the LEDs 17 are not arranged in the rising reflection part 19b.
  • the LED 17 is arranged so as to overlap with the bottom reflection part 19a in a plan view, and is arranged so as not to overlap with each rising reflection part 19b in a plan view. Therefore, the LED 17 is reflected by each rising reflection part 19b.
  • the amount of light emitted from the LED 17 is relatively small.
  • the ratio of the primary light in the light emitted from the backlight device 12 to the secondary light converted by the wavelength conversion sheet 20 is There is a risk that color unevenness may occur due to the difference between the outer peripheral side of the screen.
  • the amount of primary light emitted from the LED 17 is relatively small, and in addition, the distance between the rising reflection portion 19b and the optical member 15 is relatively short.
  • the reflected light from the rising reflection portion 19b is likely to be multiple-reflected between the optical member 15 and the wavelength conversion efficiency by the wavelength conversion sheet 20 is relatively high. It was easy to take on.
  • the LED drive board 23 provided in the backlight device 12 includes a reflective sheet 19 among the plurality of LEDs 17 arranged along the bottom surface of the chassis 14 as illustrated in FIGS. 6, 9, and 10.
  • the amount of light emission per unit time in a part of the end-side LED 17B arranged on the end side in the surface of the bottom-side reflecting portion 19a is in the center-side LED 17A arranged on the center side in the surface of the bottom-side reflecting portion 19a.
  • An LED control unit 24 that controls the driving of the LEDs 17A and 17B is provided so as to increase the amount of light emission per unit time.
  • the suffix “A” is added to the code of the central LED
  • the suffix “B” is added to the symbol of the end LED
  • the LEDs are collectively referred to without distinction.
  • No suffix is added to the code.
  • the plurality of end-side LEDs 17B arranged in a frame shape at the outer peripheral end position within the surface of the bottom-side reflecting portion 19a of the reflecting sheet 19 are relatively short-side rising reflecting portions 19bS.
  • a plurality of short-side end LEDs 17BS arranged near the LED and arranged along the X-axis direction, and a plurality of long-side ends arranged along the Y-axis direction relatively close to the long-side rising reflection portion 19bL Side LED 17BL.
  • the end LED 17B when distinguishing the end LED 17B, the subscript “S” is added to the code of the short side LED, and the subscript “L” is added to the code of the long side LED.
  • the long side end LED 17BL has the same amount of light emission per unit time as the central LED 17A, while the short side end LED 17BS has a light emission amount per unit time higher than that of the central LED 17A. It is controlled by the LED control unit 24 so as to increase.
  • the LED control unit 24 is connected to the plurality of center side LEDs 17A and the plurality of long side end side LEDs 17BL, and per unit time in the plurality of center side LED 17A and long side end side LED 17BL.
  • a small light emission amount LED control unit (low light emission amount light source control unit) 24A that controls driving so that the light emission amount of the light source becomes relatively small, and a plurality of short side edge side LEDs 17BS connected to the short side edge side LEDs 17BS.
  • a multi-emission LED control unit (multi-emission amount light source control unit) 24B that controls the drive so that the emission amount per unit time is relatively increased.
  • the subscript “A” is added to the code of the low light emission amount LED control unit, and the subscript “B” is attached to the code of the high light emission amount LED control unit.
  • the plurality of central LEDs 17A and the plurality of long-side end LEDs 17BL connected to the small light emission LED control unit 24A are defined as a small light emission LED group (low light emission light source group) 25.
  • the plurality of short-side end LEDs 17BS connected to the multiple light emission amount LED control unit 24B are referred to as a multiple light emission amount LED group (multiple light emission amount light source group) 26.
  • the low light emission amount LED group 25 and the high light emission amount LED group 26 are respectively illustrated by being surrounded by a one-dot chain line.
  • the LED control unit 24 supplies a pulse signal to each LED 17 as shown in FIGS. 9 and 10, and at the same time, a lighting period LP and a non-lighting period (non-lighting period) in each LED 17.
  • the amount of light emitted per unit time is controlled by adjusting the time ratio (duty ratio) with NLP. That is, the LED control unit 24 performs PWM (Pulse Width Modulation) dimming driving that periodically blinks each LED 17 and changes the time ratio between the lighting period LP and the extinguishing period NLP.
  • PWM Pulse Width Modulation
  • the low light emission amount LED control unit 24A supplies a pulse signal to the low light emission amount LED group 25 (a plurality of center side LEDs 17A and a plurality of long side edge side LEDs 17BL), whereby the high light emission amount LED group 26 ( Compared to the plurality of short side end LEDs 17BS), the light emission LED group 25 is dimmed so that the lighting period LP of the light emission quantity LED group 25 is relatively short and the light extinction period NLP is relatively long. is doing.
  • the multi-emission LED control unit 24B supplies a pulse signal to the multi-emission LED group 26 (the plurality of short side end LEDs 17BS), thereby reducing the low emission LED group 25 (the plurality of central LEDs 17A and the plurality of LEDs 17A).
  • the multi-emission LED group 26 is dimmed and driven so that the lighting period LP of the multi-emission LED group 26 becomes relatively longer and the turn-off period NLP becomes relatively shorter.
  • the short-side end LED 17BS among the end-side LEDs 17B disposed on the end side in the surface of the bottom-side reflecting portion 19a of the reflection sheet 19 is connected to the center-side LED 17A disposed on the center side.
  • a larger amount of blue light (primary light) from the LED 17 is supplied to the short-side rising reflection unit 19bS. be able to.
  • the long side end LED 17BL of the end side LEDs 17B arranged on the end side in the plane of the bottom side reflection portion 19a of the reflection sheet 19 and the center side LED 17A have the same light emission amount per unit time.
  • the LED control unit 24 controls, the inclination angle of the long side rising reflection part 19bL with respect to the bottom side reflection part 19a is sufficiently large as in the present embodiment, and occurs at the long side side reflection part 19bL. It is suitable when the obtained color unevenness falls within the allowable range. Further, since each LED 17 is PWM dimming driven by the LED control unit 24, the light emission amount per unit time is controlled, so that the dynamic range related to the light emission amount is sufficiently wide.
  • This embodiment has the structure as described above, and its operation will be described next.
  • various signals relating to display output from a control board (not shown) are transmitted to the liquid crystal panel 11, thereby controlling the driving of the liquid crystal panel 11 and driving the LEDs.
  • the LED control unit 24 of the substrate 23 controls the driving of the LEDs 17 of the LED substrate 18.
  • the light from the LED 17 that has been lit is directly applied to the optical member 15, or reflected by the reflection sheet 19 and indirectly applied to the optical member 15.
  • the liquid crystal panel 11 is irradiated after a predetermined optical action is given by the member 15, and is used for displaying an image in the display area of the liquid crystal panel 11.
  • the optical action of the backlight device 12 (excluding the optical action of the reflection sheet 19 described later) will be described in detail.
  • blue light (primary light) emitted from the LED 17 is After a diffusing action is imparted by the diffusion plate 15a constituting the optical member 15, a part of the wavelength is converted into green light and red light (secondary light) by the wavelength conversion sheet 20 constituting the optical sheet 15b. Converted.
  • the wavelength-converted green light and red light, that is, yellow light (secondary light) and the blue light (primary light) of the LED 17 provide substantially white illumination light.
  • the blue light (primary light) of the LED 17 and the wavelength-converted green light and red light (secondary light) are selectively condensed (anisotropic) in the Y-axis direction by the prism sheet 21.
  • Specific polarization light (p wave) is selectively transmitted by the reflective polarizing sheet 22 and emitted toward the liquid crystal panel 11, while a specific different from that is given.
  • Polarized light (s wave) is selectively reflected to the back side.
  • the reflection sheet 19 receives blue light (primary light) emitted from the LED 17 and light (primary light and secondary light) returned to the back side by the optical member 15 at the bottom reflection part 19a and the rising reflection parts 19b. Is reflected to the front side.
  • the short-side rising reflecting portion 19bS has a relatively large distance from the rising leading end portion to the rising proximal end portion, that is, the bottom reflecting portion 19a as viewed in a plane, as compared with the long-side rising reflecting portion 19bL.
  • the amount of blue light (primary light) supplied from the LED 17 is reduced as compared with the bottom-side reflection portion 19a and the long-side rising reflection portion 19bL, and multiple reflections occurring between the optical member 15 and the optical member 15 occur.
  • the wavelength conversion efficiency of light by the accompanying wavelength conversion sheet 20 tends to be higher.
  • the short-side end LED 17BS (multiple light emission amount LED group 26) disposed near the short-side rising reflecting portion 19bS includes the center-side LED 17A and the long-side end, as shown in FIGS.
  • the multi-light emission amount LED control unit 24B Compared with the side LED 17BL (low light emission amount LED group 25), the multi-light emission amount LED control unit 24B performs PWM dimming driving so that the lighting period LP becomes relatively long and the light extinction period NLP becomes relatively short. Since the amount of light emission per unit time is controlled to be relatively large, a relatively large amount of blue light emitted from the short-side end LED 17BS is efficiently directed toward the short-side rising reflector 19bS. To be supplied.
  • the blue light from the LED 17 that tends to be deficient in the reflected light from the short-side rising reflecting portion 19bS is sufficiently supplemented, so that the reflected light is hardly yellowish, and the bottom-side reflecting portion 19a and the long reflecting portion 19a It becomes difficult for a difference in color to occur between the reflected light from the side-side rising reflection portion 19bL.
  • the light emitted from the backlight device 12 is homogenized on the outer peripheral side of the screen and the central side of the screen, so that the occurrence of color unevenness is suitably suppressed.
  • the high light emission amount LED control unit 24B increases the time ratio (duty ratio) of the lighting period LP in the range of 3% to 7%, compared to the low light emission amount LED control unit 24A. Thereby, the color unevenness improvement effect as described above can be sufficiently obtained.
  • the backlight device (illumination device) 12 includes the chassis 14 having the bottom plate portion (bottom portion) 14 a and the plurality of LEDs (light sources) 17 arranged along the bottom surface of the chassis 14. And a wavelength conversion sheet (wavelength conversion member) 20 that contains a phosphor that is disposed away from the light emission side in a shape opposite to the light emitting surface 17a of the LED 17 and converts the wavelength of the light from the LED 17, and the LED 17.
  • a wavelength conversion sheet (wavelength conversion member) 20 that contains a phosphor that is disposed away from the light emission side in a shape opposite to the light emitting surface 17a of the LED 17 and converts the wavelength of the light from the LED 17, and the LED 17.
  • the light emitted from the LED 17 is reflected by the reflection sheet 19 and is applied to the wavelength conversion sheet 20 that is arranged away from the light emission side in a form facing the light emitting surface 17 a of the LED 17.
  • the wavelength is converted by the contained phosphor and emitted.
  • a plurality of LEDs 17 arranged side by side along the bottom surface of the chassis 14 are controlled in light emission amount per unit time by the LED control unit 24.
  • the LED 17 arranged on the end side in the plane of the bottom reflection part 19a is controlled by the LED control unit 24 so that the amount of light emission per unit time is relatively larger than the LED 17 arranged on the center side. Since it is controlled, more light from the LED 17 can be supplied to the rising reflecting portion 19b.
  • the LED control unit 24 supplies pulse signals to the plurality of LEDs 17 and controls the light emission amount per unit time by adjusting the time ratio between the lighting period LP and the extinguishing period NLP in the plurality of LEDs 17. Is done. In this way, the dynamic range related to the light emission amount per unit time in the plurality of LEDs 17 is sufficiently wide.
  • the LED control unit 24 includes a light emission amount related to the LED 17 disposed near the long side rising reflection portion 19bL in the plane of the bottom side reflection portion 19a, and a light emission amount related to the LED 17 disposed on the center side.
  • a light emission amount related to the LED 17 disposed near the long side rising reflection portion 19bL in the plane of the bottom side reflection portion 19a is controlled to be equal.
  • the light emission amount related to the LED 17 disposed near the long-side rising reflection portion 19bL in the plane of the bottom-side reflection portion 19a is equal to the light emission amount related to the LED 17 disposed on the center side. It is preferable to control by the LED control unit 24.
  • the LED 17 emits blue light
  • the wavelength conversion sheet 20 includes, as a phosphor, a green phosphor that converts the wavelength of blue light into green light, and the blue light into red light. And at least a red phosphor for wavelength conversion. If it does in this way, more blue light from LED17 will be supplied to the standup reflection part 19b by LED17 distribute
  • the reflection A difference is less likely to occur between the color of light and the color of light reflected by the bottom-side reflecting portion 19a. Therefore, color unevenness hardly occurs in the light emitted from the backlight device 12.
  • the wavelength conversion sheet 20 contains a quantum dot phosphor as a phosphor. If it does in this way, while the wavelength conversion efficiency of the light by the wavelength conversion sheet 20 will become higher, the color purity of the wavelength-converted light will become high.
  • the liquid crystal display device 10 includes the above-described backlight device 12 and a liquid crystal panel (display panel) 11 that displays an image using light emitted from the backlight device 12. According to the liquid crystal display device 10 having such a configuration, since the light emitted from the backlight device 12 is suppressed from occurrence of color unevenness, a display with excellent display quality can be realized.
  • the television receiver 10TV includes the liquid crystal display device 10 described above. According to such a television receiver 10TV, since the display quality of the liquid crystal display device 10 is excellent, it is possible to realize display of a television image with excellent display quality.
  • the LED control unit 124 controls driving of the short-side end LED 117BS according to the distance from the short-side rising reflection unit 119bS as shown in FIGS.
  • the short side end LED 117BS includes a plurality of first short side end LEDs (first end side light sources) 117BS1 closest to the short side rising reflector 119bS, and a first short side end.
  • a plurality of second short side end LEDs (second end side light sources) 117BS2 close to the short side rising reflector 119bS and a plurality of third short side ends farthest from the short side rising reflector 119bS LED (third end side light source) 117BS3.
  • the subscript “1” is added to the code of the first short-side end LED, and the subscript “2” is added to the code of the second short-side end LED.
  • the subscript “3” is added to the code of the LED on the third short side end side, and the subscript is not added to the code when collectively referred to without distinction.
  • the multiple light emission amount LED control unit 124B includes a first multiple light emission amount LED control unit (first multiple light emission amount light source control unit) 124B1 connected to the plurality of first short-side end LEDs 117BS1; A second multi-emission LED controller (second multi-emission light source controller) 124B2 connected to the plurality of second short-side end LEDs 117BS2 and a third multi-emission LED connected to the plurality of third short-side end LEDs 117BS3 And a control unit (third multi-emission light source control unit) 124B3.
  • first multiple light emission amount LED control unit first multiple light emission amount light source control unit
  • second multi-emission light source controller second multi-emission light source controller
  • third multi-emission LED connected to the plurality of third short-side end LEDs 117BS3
  • control unit third multi-emission light source control unit
  • the subscript “1” is added to the code of the first multi-emission LED control unit, and the subscript “2” is added to the code of the second multi-emission LED control unit.
  • ", And the subscript” 3 is added to the code of the third multi-emission amount LED control unit, and the subscript is not added to the code when collectively referred to without distinction.
  • the first multiple light emission amount LED control unit 124B1 controls driving so that the light emission amount per unit time in the plurality of first short-side end LEDs 117BS1 is the largest among the short-side end LED 117BS.
  • the emission amount per unit time in the second short-side end LED 117BS2 increases next to the emission amount related to the first short-side end LED 117BS1, and the low-emission LED group 125 (center)
  • the driving is controlled so as to be larger than the side LED 117A and the long side end LED 117BL).
  • the third multi-emission amount LED control unit 124B3 is driven so that the emission amount per unit time in the third short-side end LED 117BS3 is the smallest among the short-side end LED 117BS, but is larger than that of the low-emission amount LED group 125. I have control. As shown in FIGS.
  • the plurality of first short-side end LEDs 117BS1 connected to the first multi-emission LED control unit 124B1 are defined as a first multi-emission LED group (first multi-emission light source group) 27.
  • a plurality of second short side LED 117BS2 connected to the second multi-emission LED control unit 124B2 is used as a second multi-emission LED group (second multi-emission light source group) 28, and is connected to the third multi-emission LED control unit 124B3.
  • the plurality of third short-side end LEDs 117BS3 are used as a third multi-emission LED group (third multi-emission light source group) 29.
  • the small light emission amount LED group 125 and the multiple light emission amount LED groups 27 to 28 are illustrated in a form surrounded by an alternate long and short dash line.
  • the first multi-emission LED control unit 124B1 includes the first multi-emission LED group 27 (a plurality of first short side LED 117BS1 as shown in FIGS. 12 and 13). ) So that the lighting period LP of the first multi-emission LED group 27 is the longest and the extinguishing period NLP is the shortest as compared with any of the other LED groups 125, 28, and 29. The first multi-emission LED group 27 is dimmed.
  • the second multiple light emission amount LED control unit 124B2 supplies a pulse signal to the second multiple light emission amount LED group 28 (the plurality of second short side edge LEDs 117BS2), so that the second multiple light emission amount LED control unit 124B2 Although the lighting period LP of the multiple emission LED group 28 becomes relatively short and the extinction period NLP becomes relatively long, the small emission LED group 125 (a plurality of central sides) controlled by the small emission LED controller 124A. Compared to the LED 117A, the long side end LED 117BL), and the third multi-emission LED group 29, the second multi-emission LED group 28 has a relatively longer turn-on period LP and a shorter turn-off period NLP. 2 The light emission amount LED group 28 is dimming driven.
  • the third multi-emission LED controller 124B3 supplies a pulse signal to the third multi-emission LED group 29 (the plurality of third short-side end LEDs 117BS3), so that the first multi-emission LED group 27 and the second multi-emission LED Compared with the group 28, although the lighting period LP of the third multiple emission LED group 29 becomes relatively short and the extinction period NLP becomes relatively long, the small emission LED controlled by the small emission LED controller 124A. Compared with the group 125, the third multi-emission LED group 29 is dimmed so that the lighting period LP of the third multi-emission LED group 29 becomes relatively longer and the turn-off period NLP becomes relatively shorter.
  • the short-side end LED 117BS gradually increases in light emission amount per unit time as it approaches the short-side rising reflection portion 119bS (the distance from the short-side rising reflection portion 119bS decreases).
  • the light emission amount per unit time is increased by the multi-emission amount LED control unit 124B so that the light emission amount per unit time gradually decreases as the distance from the short side rising reflection portion 119bS increases (the distance from the short side rising reflection portion 119bS increases). Is controlled step by step. In this way, more light can be supplied to the rising tip side of the short-side rising reflecting portion 119bS than the rising proximal side.
  • the light from the LED 117 that tends to be insufficient in the reflected light by the short-side rising reflecting portion 119bS can be supplemented with an appropriate in-plane distribution, so that the reflected light and the reflected light by the bottom-side reflecting portion 119a Thus, the difference in color is less likely to occur.
  • the light emitted from the backlight device 112 is homogenized on the outer peripheral side of the screen and the central side of the screen, so that the occurrence of color unevenness is suitably suppressed.
  • the LED control unit 124 relates to the LED 117 that is disposed on the end side in the plane of the bottom-side reflecting unit 119a and relatively disposed near the rising reflecting unit 119b.
  • the amount of emitted light is controlled to be larger than the amount of emitted light related to the LED 117 that is disposed on the end side in the plane of the bottom-side reflecting portion 119a and relatively disposed far from the rising reflecting portion 119b. In this way, more light can be supplied to the rising tip side of the rising reflecting portion 119b than to the rising base end side.
  • the light from the LED 117 which tends to be deficient in the reflected light from the rising reflecting portion 119b, can be supplemented with an appropriate in-plane distribution, so that the reflected light and the reflected light from the bottom reflecting portion 119a are colored. Differences in taste are less likely to occur.
  • the LED control unit 124 performs control so that the amount of light emitted from the plurality of LEDs 117 arranged on the end side in the plane of the bottom-side reflection unit 119a gradually increases as it approaches the rising reflection unit 119b.
  • the light from the LED 117 which tends to be deficient in the reflected light from the rising reflecting portion 119b, can be supplemented with a more appropriate in-plane distribution, so that the reflected light and the reflected light from the bottom reflecting portion 119a As a result, the color difference is more difficult to occur.
  • the multiple light emission amount LED control unit 224B controls the light emission amount per unit time for the long side end side LED 217BL in addition to the short side end side LED 217BS as shown in FIGS. That is, the long side edge side LED 217BL is controlled by the multiple emission amount LED control unit 224B so that the emission amount per unit time is relatively larger than that of the center side LED 217A.
  • the multiple light emission amount LED control unit 224 ⁇ / b> B has a short side multiple emission amount LED control unit (first multiple emission amount light source control unit) 224 BS connected to the plurality of short side end LEDs 217 BS. And a long side multi-emission amount LED control unit (second multi-emission amount light source control unit) 224BL connected to the plurality of long side end side LEDs 217BL.
  • first multiple emission amount light source control unit first multiple emission amount light source control unit
  • second multi-emission amount light source control unit second multi-emission amount light source control unit
  • the short side multi-emission amount LED control unit 224BS has a light emission amount per unit time in the short side end LED 217BS that is larger than the light emission amount related to the center side LED 217A (small emission amount LED group 225), and the long side end side The drive is controlled to be larger than the amount of light emitted from the LED 217BL.
  • the long side multi-emission LED control unit 224B2 controls the driving so that the emission amount per unit time in the long side end LED 217BL is smaller than the emission amount related to the short side end LED 217BS, but more than the central LED 217A. is doing. As shown in FIGS.
  • a plurality of short-side end-side LEDs 217BS connected to the short-side multi-emission LED control unit 224BS is a short-side multi-emission LED group (first multi-emission light source group) 30,
  • a plurality of long-side end-side LEDs 217BL connected to the long-side multi-light-emission LED control unit 224BL constitute a long-side multi-light-emission LED group (second multi-emission light source group) 31.
  • the small light emission amount LED group 225 and the multiple light emission amount LED groups 30 and 31 are illustrated by being surrounded by a one-dot chain line.
  • the short side multi-emission LED control unit 224BS By supplying a pulse signal to the LED group 30 (the plurality of short-side end LEDs 217BS), the lighting period LP of the short-side multi-emission LED group 30 is the longest compared to any of the other LED groups 225 and 30. In addition, the short side multi-emission LED group 30 is dimmed so that the turn-off period NLP becomes the shortest.
  • the long-side multi-emission LED control unit 224BL supplies a pulse signal to the long-side multi-emission LED group 31 (a plurality of long-side end LEDs 217BL), which is longer than the short-side multi-emission LED group 30.
  • the lighting period LP of the side-side multiple emission LED group 31 becomes relatively short and the extinction period NLP becomes relatively long
  • the small emission LED group 225 (each of which is controlled by the small emission LED controller 224A).
  • the long side multi-emission LED group 31 is dimmed and driven so that the lighting period LP of the long side multi-emission LED group 31 becomes relatively longer and the turn-off period NLP becomes relatively shorter. is doing.
  • the short-side rising reflection part 219bS is from the rising tip part to the rising base end part, that is, the bottom reflection part 219a as viewed in a plane, as compared with the long-side rising reflection part 219bL. Therefore, the amount of blue light (primary light) supplied from the LED 217 is smaller than that of the bottom-side reflecting portion 219a and the long-side rising reflecting portion 219bL. There exists a tendency for the wavelength conversion efficiency of the light by the wavelength conversion sheet accompanying the multiple reflection which arises between to become higher.
  • the short-side end LED 217BS disposed near the short-side rising reflection portion 219bS in the surface of the bottom-side reflection portion 219a among the end-side LEDs 217B is illustrated in FIGS. 15 and 16.
  • the short side multi-emission amount LED control unit 224BS is controlled so as to maximize the emission amount per unit time, the relatively large amount of blue light emitted from the short side end side LED 217BS It is efficiently supplied toward the side rising reflecting portion 219bS.
  • the blue light from the LED 217 that tends to be deficient in the reflected light by the short-side rising reflecting portion 219bS is sufficiently supplemented, so that the reflected light is hardly yellowish, and the bottom-side reflecting portion 219a and the long reflecting portion 219a It becomes difficult for a difference in color to occur between the reflected lights by the side-side rising reflecting portion 219bL.
  • the inclination angle of the long-side rising reflecting portion 219bL with respect to the bottom-side reflecting portion 219a is larger than that of the short-side rising reflecting portion 219bS, but is smaller than that of the long-side rising reflecting portion 19bL described in the first embodiment.
  • the long side described in the first embodiment although the distance from the rising tip end to the rising base end, that is, the bottom reflecting portion 219a in plan view, is smaller than the short side rising reflecting portion 219bS. If it is larger than the side rising reflecting portion 19bL, there is a concern that the color unevenness that may occur in the long side rising reflecting portion 219bL exceeds the allowable range (see FIG. 14).
  • the long-side end LED 217BL arranged near the long-side rising reflecting portion 219bL in the plane of the bottom-side reflecting portion 219a emits light per unit time as shown in FIGS.
  • the amount of light emitted from the long side end side LED 217BL is controlled by the long side side multiple light emission amount LED control unit 224BL so that the amount is smaller than the short side end side LED 217BS but larger than the central side LED 217A. Light is efficiently supplied toward the long-side rising reflecting portion 219bL.
  • the blue light from the LED 217 which tends to be deficient in the reflected light from the long-side rising reflecting portion 219bL, is sufficiently supplemented, so that the reflected light is hardly yellowish and reflected by the bottom reflecting portion 219a.
  • the difference in color between the light and the light is difficult to occur.
  • the light emitted from the backlight device 212 is homogenized on the outer peripheral side of the screen and the central side of the screen, so that the occurrence of color unevenness is suitably suppressed.
  • the rising reflecting portion 219b is inclined with respect to the bottom reflecting portion 219a and has a relatively small inclination angle with respect to the short side rising reflecting portion (first rising reflection portion).
  • Reflection part) 219bS and a long-side rising reflection part (second rising reflection part) 219bL having a relatively large inclination angle are included, and the LED control part 224 is the bottom side of the plurality of LEDs 217.
  • the light emission amount related to the LED 217 arranged near the short side rising reflection portion 219bS in the plane of the reflection portion 219a is larger than the light emission amount related to the LED 217 arranged near the long side rising reflection portion 219bL. It shall be controlled.
  • the amount of light from the LED 217 is smaller than in the long-side rising reflection part 219bL, and the wavelength conversion efficiency of the light by the wavelength conversion sheet accompanying multiple reflection tends to be higher. is there.
  • the light emission amount related to the LED 217 arranged near the short side rising reflection portion 219bS in the plane of the bottom side reflection portion 219a is the light emission amount related to the LED 217 arranged near the long side side rising reflection portion 219bL. Since it is controlled by the LED control unit 224 so as to increase more, the color unevenness that may occur in the short-side rising reflection unit 219bS can be appropriately mitigated.
  • the LED control unit 224 has a light emission amount related to the LED 217 arranged near the long-side rising reflection unit 219bL in the plane of the bottom-side reflection unit 219a more than a light emission amount related to the LED 217 arranged on the center side. It is supposed to be controlled to increase.
  • the LED control unit 224 causes the light emission amount related to the LED 217 arranged near the long side rising reflection portion 219bL in the plane of the bottom side reflection unit 219a to be larger than the light emission amount related to the LED 217 arranged on the center side. By being controlled, color unevenness that may occur in the long-side rising reflection portion 219bL can be suitably mitigated.
  • Embodiment 4 A fourth embodiment of the present invention will be described with reference to FIG. In this Embodiment 4, what changed the light control method of LED by the LED control part from above-mentioned Embodiment 1 is shown. In addition, the overlapping description about the same structure, operation
  • the LED control unit controls the light emission amount per unit time by driving the plurality of LEDs at a constant current and changing the current values supplied to the plurality of LEDs.
  • the multi-emission LED control unit constituting the LED control unit drives the multi-emission LED group so that the current value of the constant current supplied to the multi-emission LED group is relatively high, thereby increasing the multi-emission LED. Control is performed so that the amount of light emission per unit time in the group becomes relatively large.
  • the low light emission amount LED control unit constituting the LED control unit drives the low light emission amount LED group so that the current value of the constant current supplied to the low light emission amount LED group becomes relatively low.
  • the amount of light emission per unit time in the light emission amount LED group is controlled to be relatively small. According to such a configuration, it is possible to easily reduce the cost when controlling the light emission amount per unit time in each LED. Also, noise is less likely to occur when controlling the light emission amount.
  • the LED control unit drives the plurality of LEDs at a constant current and controls the light emission amount per unit time by changing the current value supplied to the plurality of LEDs. It is said. In this way, it is possible to easily reduce the cost when controlling the light emission amount per unit time in the plurality of LEDs. Also, noise is less likely to occur when controlling the light emission amount.
  • a fifth embodiment of the present invention will be described with reference to FIG. 18 or FIG.
  • movement, and effect as above-mentioned Embodiment 1 is abbreviate
  • the rising reflection part 419b has a short-side rising reflection part 419bS and a long-side rising reflection part 419bL that have substantially the same inclination angle with respect to the bottom reflection part 419a.
  • the distance from the rising tip portion viewed in a plane to the rising proximal end portion, that is, the bottom-side reflecting portion 419a is substantially the same.
  • the multi-emission LED group 426 according to the present embodiment is configured by all end-side LEDs 417B including a plurality of short-side end LEDs 417BS and a plurality of long-side end LEDs 417BL. Accordingly, as shown in FIGS.
  • the multi-emission amount LED control unit (end-side LED control unit) 424B includes a plurality of short-side end LEDs 417BS and a plurality of long-side end-side LEDs 417BL (multi-emission amount LED group 426).
  • the amount of light emission per unit time is relative to the amount of light emission per unit time in the plurality of center side LEDs 417A (multiple light emission amount LED group 425) controlled by the small light emission amount LED control unit (center side LED control unit) 424A. It is controlled to increase to.
  • the multiple light emission amount LED control unit 424B determines that the light emission amounts per unit time of the plurality of short side end LEDs 417BS and the light emission amounts per unit time of the plurality of long side end LEDs 417BL are substantially equal. , 417BL are controlled.
  • FIG. 10 described in the above-described first embodiment. It is the same.
  • the small light emission amount LED group 425 and each of the large light emission amount LED groups 426 are illustrated in the form of being surrounded by alternate long and short dashed lines.
  • the short side end LED 417BS (multiple light emission amount LED group 426) disposed near the short side rising reflection part 419bS and the long side disposed near the long side rising reflection part 419bL.
  • the side LED 417BL (multiple light emission LED group 426) has a relative lighting period LP relative to the central LED 417A (low light emission LED group 425). Since the PWM dimming drive is performed so that the light extinction period NLP becomes relatively short while the light extinction period NLP becomes relatively short, the light emission amount per unit time is controlled to be relatively large (see FIG. 10).
  • a relatively large amount of blue light emitted from the short-side end LED 417BS and the long-side end LED 417BL is reflected on the short-side rising reflecting portion 419bS.
  • Each toward beauty long-side rising reflecting portion 419bL is efficiently supplied.
  • the blue light from the LED 417 that tends to be insufficient for the reflected light by the short-side rising reflection part 419bS and the long-side rising reflection part 419bL is sufficiently supplemented, so that the reflected light is hardly yellowish.
  • a difference in color is unlikely to occur between the reflected light from the bottom-side reflecting portion 419a.
  • the light emitted from the backlight device 412 is homogenized on the outer peripheral side of the screen and the central side of the screen, so that the occurrence of color unevenness is suitably suppressed.
  • the LED control is performed so that the short-side end LEDs are grouped into three multi-emission amount LED groups, and the emission amount per unit time thereof increases as it approaches the short-side rising reflecting portion.
  • the LEDs on the short side edge side are grouped into two or four or more multiple light emission amount LED groups, and the light emission amount per unit time thereof approaches the short side rising reflection portion. It is also possible to control by LED control so that the number increases.
  • the short-side end LEDs are grouped into a plurality of multiple light-emitting amount LED groups, and the amount of light emission per unit time thereof approaches the short-side rising reflecting portion.
  • a plurality of the multiple light emission amount LED groups may include those having the same light emission amount per unit time.
  • the light emission amount per unit time in the first multi-emission LED group closest to the short-side rising reflection portion is maximized, and the second multi-emission LED group and the first multi-emission LED group 3
  • the light emission amounts per unit time in the multiple light emission amount LED group are made substantially equal to each other, and the value is smaller than the light emission amount related to the first multiple light emission amount LED group and larger than the light emission amount related to the low light emission amount connector group. Is also possible.
  • the light emission amounts per unit time in the first multi-light-emission LED group and the second multi-light-emission LED group are substantially equal to each other and maximized, and the unit time in the third multi-light-emission LED group It is also possible to make the amount of emitted light per unit smaller than the amount of light emitted from the first multi-light-emitting LED group and the second multi-light-emitting LED group and larger than the amount of light emitted from the low-light-emitting connector group.
  • the light emission amounts per unit time in the first multi-emission LED group, the second multi-emission LED group, and the third multi-emission LED group are substantially equal to each other, and the value is reduced. It is also possible to make it larger than the light emission amount related to the light emission amount connector group.
  • the short-side end LEDs are grouped into a plurality of multiple light-emitting amount LED groups, and the amount of light emission per unit time thereof approaches the short-side rising reflective portion.
  • the long side end side LEDs are grouped into a plurality of multiple light emission amount LED groups, and the light emission amount per unit time in them increases as it approaches the long side rising reflection portion. It is also possible to control by LED control. In such a configuration, the inclination angle of the long-side rising reflecting portion with respect to the bottom-side reflecting portion is made smaller than the inclination angle related to the short-side rising reflecting portion, and the long-side rising reflecting portion is viewed in a plane. It is suitable when the distance from the rising tip portion to the rising base end portion, that is, the bottom-side reflecting portion is larger than the distance related to the short-side rising reflecting portion.
  • the short side end LEDs are grouped into a plurality of multiple light emission amount LED groups so that the light emission amount per unit time thereof increases as it approaches the short side rising reflection portion. It is also possible to control by LED control. Similarly, it is also possible to group the long side end side LEDs into a plurality of multiple light emission amount LED groups and control them by LED control so that the light emission amount per unit time thereof increases as it approaches the long side rising reflection portion. .
  • the number of groups of the multi-emission LED group in the short side end LED and the number of groups of the multi-emission LED group in the long side end LED can be set differently. .
  • the end-side LEDs are grouped into a plurality of multiple light emission amount LED groups, and the light emission amount per unit time in them is controlled by LED control so as to increase as it approaches the reflecting portion. It is also possible.
  • the stacking order of the wavelength conversion sheet, the prism sheet, and the reflective polarizing sheet constituting the optical sheet can be appropriately changed. Further, the number and type of optical sheets can be changed as appropriate. It is also possible to change the number of diffusion plates included in the optical member or remove the diffusion plates.
  • the wavelength conversion sheet is configured to include the green phosphor and the red phosphor has been described.
  • the wavelength conversion sheet may be configured to include only the yellow phosphor or yellow.
  • a red phosphor or a green phosphor may be included.
  • the quantum dot phosphor used as the phosphor included in the wavelength conversion sheet is a core-shell type composed of CdSe and ZnS is exemplified. It is also possible to use the core type quantum dot phosphor.
  • a material CdSe, CdS, ZnS
  • a material that is a combination of Zn, Cd, Hg, Pb or the like that becomes a divalent cation and O, S, Se, Te, or the like that becomes a divalent anion is used alone. Is possible.
  • a material InP (indium phosphide), GaAs (gallium arsenide), etc.) that combines trivalent cations such as Ga and In and trivalent anions such as P, As, and Sb, It is also possible to use a chalcopyrite type compound (such as CuInSe 2 ) alone.
  • alloy type quantum dot phosphors can also be used. It is also possible to use a quantum dot phosphor that does not contain cadmium.
  • the quantum dot phosphor used as the phosphor included in the wavelength conversion sheet is exemplified as a CdSe and ZnS core-shell type, but other materials are combined. It is also possible to use a core / shell type quantum dot phosphor.
  • the wavelength conversion sheet includes a quantum dot phosphor.
  • a sulfide phosphor can be used as the phosphor to be contained in the wavelength conversion sheet, specifically, SrGa 2 S 4 : Eu 2+ as the green phosphor and (Ca, Sr, Ba) as the red phosphor.
  • S: Eu 2+ can be used respectively.
  • green phosphors contained in the wavelength conversion sheet may be (Ca, Sr, Ba) 3 SiO 4 : Eu 2+ , ⁇ -SiAlON: Eu 2+ , Ca 3 Sc. 2 Si 3 O 12 : Ce 3+ or the like.
  • the phosphor for red contained in the wavelength conversion sheet may be (Ca, Sr, Ba) 2 SiO 5 N 8 : Eu 2+ , CaAlSiN 3 : Eu 2+, or the like.
  • the phosphor for yellow to be contained in the wavelength conversion sheet includes (Y, Gd) 3 (Al, Ga) 5 O 12 : Ce 3+ (common name YAG: Ce 3+ ), ⁇ -SiAlON: Eu 2+ , (Ca, Sr, Ba) 3 SiO 4 : Eu 2+ or the like.
  • a double fluoride phosphor such as manganese-activated potassium silicofluoride (K 2 TiF 6 )
  • K 2 TiF 6 manganese-activated potassium silicofluoride
  • an organic phosphor can be used as the phosphor contained in the wavelength conversion sheet.
  • the organic phosphor for example, a low molecular organic phosphor having a basic skeleton of triazole or oxadiazole can be used.
  • a phosphor that performs wavelength conversion by energy transfer via dressed photons (near-field light) is used as the phosphor to be contained in the wavelength conversion sheet. It is also possible. Specifically, a phosphor having a structure in which a DCM dye is dispersed and mixed in zinc oxide quantum dots (ZnO-QD) having a diameter of 3 nm to 5 nm (preferably about 4 nm) is used as this type of phosphor. preferable.
  • ZnO-QD zinc oxide quantum dots
  • the emission spectrum of LEDs (the numerical value of peak wavelength, the numerical value of peak half-value width, etc.) and the emission spectrum of the phosphor contained in the phosphor layer (the numerical value of peak wavelength, the peak The numerical value of the half width can be appropriately changed.
  • chassis is made of metal
  • chassis can be made of synthetic resin
  • the LED is used as the light source, but other light sources such as an organic EL can be used.
  • the liquid crystal panel and the chassis are vertically placed with the short side direction aligned with the vertical direction.
  • the liquid crystal panel and the chassis have the long side direction in the vertical direction. Those that are in a vertically placed state matched with are also included in the present invention.
  • the TFT is used as the switching element of the liquid crystal display device.
  • the present invention can also be applied to a liquid crystal display device using a switching element other than the TFT (for example, a thin film diode (TFD)).
  • a switching element other than the TFT for example, a thin film diode (TFD)
  • the present invention can also be applied to a liquid crystal display device for monochrome display.
  • the transmissive liquid crystal display device has been exemplified.
  • the present invention can also be applied to a reflective liquid crystal display device and a transflective liquid crystal display device.
  • the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified.
  • the present invention is applicable to display devices using other types of display panels.
  • the television receiver provided with the tuner is exemplified, but the present invention can also be applied to a display device not provided with the tuner. Specifically, the present invention can also be applied to a liquid crystal display device used as an electronic signboard (digital signage) or an electronic blackboard.
  • Liquid crystal display device (display device), 10 TV ... TV receiver, 11 ... Liquid crystal panel (display panel), 12, 112, 212 ... Backlight device (illumination device), 14. Chassis, 14a ... bottom plate (bottom), 17, 117, 217, 417 ... LED (light source), 17a ... light emitting surface, 19 ... reflection sheet (reflection member), 19a, 119a, 219a, 419a ... bottom-side reflecting portion, 19b, 119b, 219b, 419b ... rising reflecting portion, 19bL, 219bL, 419bL ... long side rising reflecting portion (second rising reflecting portion), 19bS, 119bS , 219bS, 419bS ...
  • short side rising reflection part (first rising reflection part), 20 ... wavelength conversion sheet (wavelength conversion member), 24, 124, 224 ... LED control part (light source control part) 24A, 124A, 2 4A, 424A ... Multiple emission LED control unit (light source control unit), 24B, 124B, 224B, 424B ... Low emission LED control unit (light source control unit), LP ... Lighting period, NLP ... Off period

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Un dispositif de rétroéclairage 12 est pourvu : d'un châssis 14; d'une pluralité de Diodes Électroluminescentes (DEL) 17 disposées côte à côte le long de la surface inférieure du châssis 14; d'une feuille de conversion de longueur d'onde 20 pour convertir la longueur d'onde de la lumière provenant des DEL 17; d'une feuille de réflexion 19, ayant au moins une partie de réflexion du côté du fond 19a conçue sous une forme qui s'adapte à une partie de plaque inférieure 14a, et une pièce de réflexion montante 19b qui remonte depuis la partie de réflexion du côté du fond 19a vers la feuille de conversion de longueur d'onde 20; et d'une unité de commande de DEL 24 pour effectuer une commande de telle sorte que la quantité de luminescence se rapportant à celles de la pluralité de DEL 17 qui sont disposées sur les côtés d'extrémité dans le plan de la partie de réflexion du côté du fond 19a soit supérieure à la quantité de luminescence se rapportant aux DEL 17 disposées au centre.
PCT/JP2016/056187 2015-03-02 2016-03-01 Dispositif d'éclairage, dispositif d'affichage, et récepteur de télévision WO2016140209A1 (fr)

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JP2015-040376 2015-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113892027A (zh) * 2019-03-14 2022-01-04 株式会社艾泰克系统 光照射系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005115372A (ja) * 2003-10-03 2005-04-28 Lumileds Lighting Us Llc Ｌｅｄの二次元アレイを用いるｌｃｄバックライト
JP2007219234A (ja) * 2006-02-17 2007-08-30 Matsushita Electric Ind Co Ltd 液晶表示装置のバックライト装置
WO2009072429A1 (fr) * 2007-12-07 2009-06-11 Sony Corporation Appareil source de lumière et appareil d'affichage
JP2009164026A (ja) * 2008-01-09 2009-07-23 Epson Imaging Devices Corp 照明ユニット、液晶装置及び電子機器
WO2011077863A1 (fr) * 2009-12-25 2011-06-30 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision
JP2013152862A (ja) * 2012-01-25 2013-08-08 Sharp Corp 照明装置およびそれを備えた表示装置
JP2013544018A (ja) * 2010-11-10 2013-12-09 ナノシス・インク． 量子ドットフィルム、照明装置、および照明方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005115372A (ja) * 2003-10-03 2005-04-28 Lumileds Lighting Us Llc Ｌｅｄの二次元アレイを用いるｌｃｄバックライト
JP2007219234A (ja) * 2006-02-17 2007-08-30 Matsushita Electric Ind Co Ltd 液晶表示装置のバックライト装置
WO2009072429A1 (fr) * 2007-12-07 2009-06-11 Sony Corporation Appareil source de lumière et appareil d'affichage
JP2009164026A (ja) * 2008-01-09 2009-07-23 Epson Imaging Devices Corp 照明ユニット、液晶装置及び電子機器
WO2011077863A1 (fr) * 2009-12-25 2011-06-30 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision
JP2013544018A (ja) * 2010-11-10 2013-12-09 ナノシス・インク． 量子ドットフィルム、照明装置、および照明方法
JP2013152862A (ja) * 2012-01-25 2013-08-08 Sharp Corp 照明装置およびそれを備えた表示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113892027A (zh) * 2019-03-14 2022-01-04 株式会社艾泰克系统 光照射系统

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