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WO2012029360A1 - Dispositif d'éclairage et dispositif d'affichage - Google Patents

Dispositif d'éclairage et dispositif d'affichage Download PDF

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Publication number
WO2012029360A1
WO2012029360A1 PCT/JP2011/061391 JP2011061391W WO2012029360A1 WO 2012029360 A1 WO2012029360 A1 WO 2012029360A1 JP 2011061391 W JP2011061391 W JP 2011061391W WO 2012029360 A1 WO2012029360 A1 WO 2012029360A1
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WO
WIPO (PCT)
Prior art keywords
led
light
leds
light source
backlight unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/061391
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English (en)
Japanese (ja)
Inventor
満 細木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2012029360A1 publication Critical patent/WO2012029360A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

Definitions

  • the present invention relates to a lighting device and a display device, and more particularly to a lighting device in which light sources are two-dimensionally arranged and a display device including the lighting device.
  • a backlight unit for supplying light is usually mounted on the liquid crystal display panel.
  • the backlight unit is preferably configured to generate planar light that spreads over the entire area of the planar liquid crystal display panel.
  • a direct backlight unit is known as a backlight unit for supplying light to a liquid crystal display panel.
  • the direct type backlight unit has a configuration in which a plurality of LEDs (Light Emitting Diodes) serving as a light source are arranged below the diffusion plate. And it is comprised so that the light from several LED may be spread
  • LEDs Light Emitting Diodes
  • the conventional direct type backlight unit has a disadvantage that the luminance is lowered at the edge of the screen. Therefore, there is a problem that it is difficult to improve luminance uniformity.
  • the present invention has been made to solve the above-described problems, and one object of the present invention is to improve luminance uniformity by suppressing luminance reduction at the end.
  • An illumination device and a display device equipped with the illumination device are provided.
  • an illumination apparatus includes a plurality of light sources and a base on which the plurality of light sources are two-dimensionally arranged.
  • the substrate is formed in a substantially rectangular shape having a pair of long sides and a pair of short sides when seen in a plan view, and at least each of the end portions on the long side has the light source, More than the central part of the substrate are arranged.
  • the luminance at the end portion on the long side is increased by disposing more light sources than the central portion of the base at each end portion on the long side. Can be increased. Thereby, since the fall of the brightness
  • the end portion on the long side is longer than the end portion on the short side, it is possible to effectively improve the luminance uniformity by increasing the luminance of at least the end portions on the long side.
  • the number of light sources arranged at the end on the long side is preferably about several to 10% larger than the number of light sources arranged at the center of the base.
  • each of the plurality of light sources includes a light emitting diode, and the forward current of the light emitting diode is set to be substantially the same in each of the plurality of light sources. preferable.
  • the light emitting diode is preferably a white light emitting diode.
  • the plurality of light sources are preferably connected in series in the long side direction. If comprised in this way, since the structure of an illuminating device can be simplified, the illuminating device which can improve a brightness
  • luminance uniformity can be obtained at low cost.
  • the lighting device preferably further includes a light source control unit that controls driving of a plurality of light sources.
  • the light source control unit may include a first light source control unit and a second light source control unit different from the first light source control unit.
  • the first light source control unit controls the driving of the light source arranged at the end on the long side
  • the second light source control unit controls the driving of the light source arranged at the center of the base. Can be configured.
  • more light sources are arranged at each of the end portions on the short side than at the central portion of the base. If comprised in this way, a brightness
  • the light source disposed at the end portion on the short side may be configured to have higher luminance than the light source disposed at the center portion of the base. If comprised in this way, since a brightness
  • a display device includes the illumination device according to the first aspect and a display panel that receives light from the illumination device. If comprised in this way, the display apparatus with the high brightness uniformity which the brightness fall at the edge part was suppressed can be obtained easily.
  • an illuminating device capable of improving luminance uniformity and a display device equipped with the illuminating device by suppressing a decrease in luminance at the end. it can.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device according to a first embodiment of the present invention. It is the top view (figure which showed the arrangement state of LED used for a backlight unit) which showed a part of backlight unit by a 1st embodiment of the present invention. It is the top view which showed a part of backlight unit by 1st Embodiment of this invention.
  • FIG. 3 is a cross-sectional view of the backlight unit (liquid crystal display device) according to the first embodiment of the present invention (a view corresponding to a cross section taken along the line AA in FIG. 2). It is the schematic diagram which showed the connection state of LED of the backlight unit by 1st Embodiment of this invention.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device according to a first embodiment of the present invention.
  • 2 and 3 are plan views showing a part of the backlight unit according to the first embodiment of the present invention.
  • 4 to 8 are diagrams for explaining the backlight unit according to the first embodiment of the present invention.
  • FIG. 2 the arrangement
  • the liquid crystal display device 100 includes a liquid crystal display panel 10, a backlight unit 50 that supplies light to the liquid crystal display panel 10, and a pair facing each other with these interposed therebetween.
  • Housing 70 front housing 71, back housing 72.
  • the liquid crystal display device 100 is an example of the “display device” in the present invention
  • the liquid crystal display panel 10 is an example of the “display panel” in the present invention
  • the backlight unit 50 is an example of the “lighting device” in the present invention.
  • an active matrix substrate 11 including a switching element such as a TFT (Thin Film Transistor) and an opposite substrate 12 facing the active matrix substrate 11 are bonded to each other with a sealing material (not shown). It is constituted by.
  • a liquid crystal (not shown) is injected into the gap between the substrates 11 and 12.
  • a polarizing film 13 is attached to each of the light receiving surface side of the active matrix substrate 11 and the light emitting surface side of the counter substrate 12.
  • the liquid crystal display panel 10 configured in this manner displays an image by using a change in transmittance caused by the tilt of liquid crystal molecules.
  • the backlight unit 50 is a direct-type backlight unit, and includes the LED module 20, the backlight chassis 30, the reflection sheet 40, the diffusion plate 45, the prism sheet 46, and the lens sheet 47. is doing.
  • the backlight unit 50 is disposed directly below the liquid crystal display panel 10.
  • the backlight chassis 30 is a substantially box-shaped member opened on the liquid crystal display panel 10 side, and has a bottom portion 30a and a side portion 30b provided on the outer periphery of the bottom portion 30a.
  • the backlight chassis 30 is formed, for example, by processing a metal plate-like member, and accommodates them by spreading the LED module 20 and the reflection sheet 40 on the bottom surface 30c.
  • region enclosed by the side part 30b of the backlight chassis 30 becomes substantially rectangular shape (substantially rectangular shape), and the area
  • the backlight chassis 30 is formed in a substantially rectangular shape, and therefore has a pair of long sides 31 and a pair of short sides 32 in plan view. Yes.
  • the backlight chassis 30 is an example of the “base” in the present invention.
  • the LED module 20 constituting the backlight unit 50 is a module that emits light, and includes a mounting substrate 21 and an LED 22 as a light source mounted on the mounting surface 21a of the mounting substrate 21.
  • the mounting substrate 21 is a plate-like and rectangular substrate, and a plurality of electrodes (not shown) are arranged on the mounting surface 21a. And said LED22 is attached on these electrodes.
  • the LED 22 is mounted on an electrode (not shown) formed on the mounting surface 21a of the mounting substrate 21 so as to receive light and emit light.
  • a plurality of LEDs 22 as light sources are mounted in the accommodation area of the backlight chassis 30.
  • Each of the plurality of LEDs 22 is composed of a white LED (white light emitting diode), and is two-dimensionally arranged in the accommodation region of the backlight chassis 30 (on the bottom surface 30c of the backlight chassis 30).
  • the same type of white LED is used for the plurality of LEDs 22. That is, the backlight unit 50 according to the first embodiment includes a plurality of white LEDs of the same type.
  • the LED module 20 is formed in an elongated shape so as to extend in the long side direction (X direction) of the backlight chassis 30, and intersects the X direction. A plurality are arranged in the direction (Y direction). In the LED module 20, a plurality of LEDs 22 are arranged at predetermined intervals in the extending direction (X direction) of the LED module 20.
  • the plurality of LEDs 22 are straight along the row direction (X direction). Are arranged in a shape. That is, a plurality of LEDs 22 are located on the two-dot chain line R indicating each row.
  • the interval between the LEDs 22 in each row is equal.
  • interval b (arrangement space
  • the luminance is lower than that at the central portion.
  • the center part center part of a short side direction (Y direction)
  • the number of LEDs 22 arranged in the long side direction is increased. That is, more LEDs 22 are arranged at the end (upper and lower ends) on the long side 31 side than at other locations.
  • the LED module 20 (20a) disposed at the end (upper and lower ends) of the backlight chassis 30 on the long side 31 side includes the LED module 20 (20b) disposed at the center of the backlight chassis 30. More LEDs 22 are mounted than in FIG. For this reason, the interval a1 of the LEDs 22 at the end (upper and lower ends) of the backlight chassis 30 on the long side 31 side is denser (smaller) than the interval a2 of the LEDs 22 at the center of the backlight chassis 30. .
  • the luminance is reduced by several to 10% at the edge of the screen.
  • the number of LEDs 22 arranged in the long side direction at the end portion (upper and lower ends) on the long side 31 side is larger than the central portion (the center portion in the short side direction (Y direction)) of the backlight chassis 30. It is preferable to increase it by several% to 10% (for example, about 5% to 10%).
  • each of the LEDs 22 arranged on the shortest side 32 side is arranged so that the distance from the side portion 30b is substantially the same. It is preferable.
  • the plurality of LEDs 22 are connected in series in the long side direction (X direction). Specifically, the LEDs 22 mounted on the LED module 20 (see FIG. 3) are connected in series for each LED module 20. Moreover, as above-mentioned, several LED22 consists of the same type white LED, and the forward current of each LED22 is set so that it may become substantially the same. More specifically, the plurality of LEDs 22 mounted on the backlight unit 50 have substantially the same drive current between the LEDs 22 arranged at the upper and lower ends and the LEDs 22 arranged at other than the upper and lower ends. Is set to
  • the backlight unit 50 includes an LED driver 60 for driving the LEDs 22.
  • a plurality of LEDs 22 connected in series for each row are connected to the LED driver 60. Yes.
  • the LED driver 60 is an example of the “light source control unit” in the present invention.
  • an LED package 122 in which a blue light emitting LED chip 122a is sealed with a sealing resin 122b containing a phosphor (not shown) is used. be able to.
  • the LED chips 122a are preferably connected in series as shown in FIG.
  • the reflection sheet 40 (see FIG. 1) included in the backlight unit 50 is formed by, for example, processing a resin sheet member, and includes a plurality of hole portions 41a whose opening shape in a plan view is substantially circular. And a side portion 42 provided on the outer periphery of the bottom portion 41. Moreover, the hole 41a of the reflection sheet 40 is formed so as to correspond to the LEDs 22 arranged two-dimensionally.
  • the reflection sheet 40 is housed in the housing area of the backlight chassis 30 together with the LED module 20 such that a part of the LED 22 protrudes from the hole 41 a.
  • the bottom surface 30 c of the backlight chassis 30 and the mounting surface 21 a of the mounting substrate 21 are covered by the bottom 41 of the reflection sheet 40, and the inner side surface of the backlight chassis 30 is covered by the side 42 of the reflection sheet 40.
  • the diffusion plate 45 is an optical sheet that overlaps the LED module 20 and diffuses light emitted from the LED module 20 (LED 22). That is, the diffusion plate 45 diffuses the light from the LEDs 22 and spreads the light over the entire area of the liquid crystal display panel 10.
  • the prism sheet 46 is an optical sheet that overlaps the diffusion plate 45.
  • this prism sheet 46 for example, triangular prisms extending in one direction (linearly) are arranged in a direction intersecting with one direction in the sheet surface, and the radiation characteristic of light from the diffusion plate 45 is deflected.
  • the lens sheet 47 is an optical sheet that overlaps the prism sheet 46.
  • fine particles that refract and scatter light are dispersed in the lens sheet 47, and the light from the prism sheet 46 is not collected locally, and the difference in brightness (light intensity unevenness) is suppressed.
  • the light distribution distribution (Light distribution characteristic: Refer to the dashed-dotted line of FIG. 4) of each LED22 is also substantially the same. . Therefore, in the backlight unit 50 of the first embodiment, the distance from the LED 22 to the diffusion plate 45 is also constant.
  • the backlight unit 50 forms planar light by superimposing light from the plurality of LEDs 22 (LED modules 20), and the planar light is converted into a plurality of optical members 45. To 47 and supplied to the liquid crystal display panel 10. Thereby, the non-light-emitting liquid crystal display panel 10 receives the light (backlight light) from the backlight unit 50 and improves the display function.
  • the long side 31 side is arranged.
  • the brightness at the end can be increased. Thereby, since the fall of the brightness
  • the end portion on the long side 31 side is longer than the end portion on the short side 32 side, at least the luminance of each end portion on the long side 31 side is increased, thereby effectively improving the luminance uniformity. be able to.
  • the same LED driver 60 power supply
  • the LED 22 can be driven. That is, since the brightness is increased by increasing the number of LEDs 22 at the upper and lower ends of the backlight chassis 30, the same LED driver 60 is used by setting each LED 22 to have substantially the same forward current. Can do. For this reason, while being able to simplify the structure of the backlight unit 50, since it is not necessary to use several types of LED drivers, it can manufacture at low cost.
  • the configuration of the backlight unit 50 can be simplified by connecting a plurality of LEDs 22 in series in the long side direction (X direction: horizontal direction of the screen). Moreover, the number of LED drivers 60 can be reduced by connecting a plurality of LEDs 22 in series. Furthermore, the current variation of the LEDs 22 connected in series can be reduced. In addition, the forward voltage variation (total voltage variation) of the LED 22 can be reduced. As a result, a high-quality backlight unit capable of improving luminance uniformity can be obtained at low cost.
  • the liquid crystal display device 100 including the upper and lower ends of the screen and having uniform luminance can be obtained.
  • FIG. 9 is a diagram for explaining a backlight unit according to a modification of the first embodiment.
  • a backlight unit according to a modification of the first embodiment will be described with reference to FIG.
  • corresponding components are denoted by the same reference numerals, and redundant description is omitted as appropriate.
  • positioned at the upper and lower ends of the backlight chassis 30 becomes a voltage different from the LED group (LED module 20 arrange
  • the LED module 20 including the first LED driver 161 and the second LED driver 162 and disposed at the upper and lower ends of the backlight chassis 30 is the first LED driver 161.
  • the LED module 20 arranged at a position other than the upper and lower ends is configured to control the drive by the second LED driver 162.
  • the first LED driver 161 is an example of the “first light source control unit” in the present invention
  • the second LED driver 162 is an example of the “second light source control unit” in the present invention.
  • FIG. 10 is a plan view illustrating a part of the backlight unit according to the second embodiment of the present invention.
  • FIG. 11 and FIG. 12 are diagrams showing an example of a high-intensity LED mounted on the backlight unit according to the second embodiment of the present invention.
  • a backlight unit according to a second embodiment of the present invention will be described with reference to FIG. 7 and FIGS.
  • symbol is attached
  • each LED module 20 on the shortest side 32 side (long side direction (X direction): left and right ends)
  • LEDs 122 having higher luminance than other LEDs 22 (for example, LEDs 22 arranged in the center) are arranged.
  • An LED package (white LED) on which a larger number of LED chips are mounted than the other LEDs 22 is used for the LEDs 222 (high-brightness LEDs) arranged at the end (left and right ends) on the short side 32 side of the backlight chassis 30. be able to.
  • the LED 222 (high-brightness LED) is sealed with a larger number of LED chips 122a similar to the LED chip 122a shown in FIG. 7 and a phosphor (not shown).
  • An LED package 222a (222) sealed with a resin 122b can be used.
  • Each LED chip 122a is preferably connected in series as shown in FIG.
  • luminance is used for LED arrange
  • the luminance can be increased not only at the end (upper and lower ends) on the long side 31 side but also at the end (left and right ends) on the short side 32 side.
  • luminance uniformity can be improved more.
  • the brightness of the end portion (left and right ends) on the short side 32 side of the backlight chassis 30 is set to be higher by about several to 10% (for example, about 5% to 10%) than the central portion. Preferably it is done.
  • FIG. 13 is a plan view illustrating a part of the backlight unit according to the third embodiment of the present invention.
  • FIG. 14 is a schematic diagram illustrating a connection state of LEDs of the backlight unit according to the third embodiment of the present invention.
  • a backlight unit according to a third embodiment of the present invention will be described with reference to FIGS.
  • symbol is attached
  • the central portion (long side direction (X direction)) of the backlight chassis 30 at the end portion (left and right ends) on the short side 32 side of the backlight chassis 30, the central portion (long side direction (X direction)) of the backlight chassis 30.
  • the number of LEDs 22 arranged in the short side direction is larger than that in the central portion of FIG.
  • an LED module 20 (20c) extending in the short side direction (Y direction) is further arranged at the end (left and right ends) of the backlight chassis 30 on the short side 32 side.
  • a larger number of LEDs 22 than the number of LEDs 22 arranged in the short side direction (Y direction) in the central portion are arranged at a predetermined interval (for example, at equal intervals).
  • the number of LED22 arranged in a short side direction is several. It is preferable to increase by about 10% to 10% (for example, about 5% to 10%).
  • LED22 mounted in the said LED module 20 (LED module 20c arrange
  • a plurality of LEDs 22 are connected in series in the short side direction (Y direction) at the end (left and right ends) on the short side 32 side. That is, in the LED module 20 (20c) arranged at the end (left and right ends) on the short side 32 side, a plurality of LEDs 22 mounted on the LED module 20 (20c) are connected in series.
  • the end portion (upper and lower sides) on the long side 31 side is arranged.
  • the luminance can be increased not only at the end) but also at the end (left and right ends) on the short side 32 side.
  • each LED may be individually controlled.
  • the number of LED modules mounted and the number of LEDs mounted on the LED modules are not limited to the configuration shown in the above embodiment, and can be changed as appropriate.
  • a plurality of LEDs 22 can be connected in series for each row by electrically connecting the LED modules 20 adjacent in the long side direction (X direction) with a connector (not shown).
  • a plurality of LEDs are configured from white LEDs of the same type.
  • the present invention is not limited to this, and, for example, is different for some of the plurality of LEDs.
  • a type of LED may be used.
  • the present invention is not limited to this example. You may comprise so that the number of LED may increase in steps as it goes to the edge part side from the center part of a light chassis.
  • the backlight chassis is shown as an example of a substrate on which a plurality of LEDs are arranged.
  • the present invention is not limited to this, and a plurality of LEDs are mounted on a substrate other than the backlight chassis. You may arrange.
  • a plurality of LEDs may be two-dimensionally arranged on the surface of the plate member. In this case, the LED can be accommodated in the backlight chassis in a state of being arranged on the plate-like member.
  • the type of LED is not particularly limited.
  • the LED may include a blue light emitting LED chip (light emitting chip) and a phosphor that receives light from the LED chip and fluoresces yellow light.
  • a blue light emitting LED chip light emitting chip
  • a phosphor that receives light from the LED chip and fluoresces yellow light.
  • Such an LED generates white light using light from a blue light emitting LED chip and light emitted from a fluorescent light.
  • the number of LED chips included in the LED is not particularly limited.
  • the phosphor incorporated in the LED is not limited to a phosphor that emits yellow light.
  • an LED includes a blue light emitting LED chip and a phosphor that emits green light and red light in response to light from the LED chip, and emits blue light and fluorescent light (green light) from the LED chip. , Red light) and white light can be used.
  • the LED chip built in the LED is not limited to the one emitting blue light.
  • the LED may include a red LED chip that emits red light, a blue LED chip that emits blue light, and a phosphor that emits green light by receiving light from the blue LED chip. With such an LED, white light can be generated by red light from the red LED chip, blue light from the blue LED chip, and green light that fluoresces.
  • the LED may be an LED that does not contain any phosphor.
  • a red LED chip that emits red light, a green LED chip that emits green light, and a blue LED chip that emits blue light are configured to generate white light by mixing light from all LED chips. Also good.
  • an LED package in which a plurality of LED chips are connected in series is shown as an example of an LED.
  • an LED package in which a plurality of LED chips are connected in parallel can also be used. is there.
  • the backlight unit includes the diffuser plate, the prism sheet, and the lens sheet as the optical member (optical sheet).
  • the optical member optical sheet
  • the optical member optical sheet
  • the optical member can be appropriately changed (added or deleted) as necessary.
  • the present invention is not limited to this, and is for supplying light to the display panel.
  • the present invention can be applied to all non-light emitting display devices including a backlight unit.
  • Liquid crystal display panel (display panel) DESCRIPTION OF SYMBOLS 11 Active matrix board

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage, lequel dispositif est apte à améliorer l'uniformité de luminosité par suppression d'une diminution de luminosité dans des sections d'extrémité. Cette unité de rétro-éclairage (dispositif d'éclairage) (50) comporte une pluralité de diodes électroluminescentes (22) et un châssis de rétro-éclairage (30) sur lequel les diodes électroluminescentes (22) sont disposées dans deux dimensions. Le châssis de rétro-éclairage (30), vu en vue en plan, est formé sous une forme sensiblement rectangulaire ayant une paire de longueurs (31) et une paire de largeurs (32), et davantage des diodes électroluminescentes (22) sont disposées au moins dans les sections d'extrémité (extrémités supérieure et inférieure) au niveau des longueurs (31) que dans la section centrale du châssis de rétro-éclairage (30).
PCT/JP2011/061391 2010-08-30 2011-05-18 Dispositif d'éclairage et dispositif d'affichage Ceased WO2012029360A1 (fr)

Applications Claiming Priority (2)

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JP2010-192109 2010-08-30
JP2010192109 2010-08-30

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WO2012029360A1 true WO2012029360A1 (fr) 2012-03-08

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WO2014010161A1 (fr) * 2012-07-12 2014-01-16 パナソニック株式会社 Module émetteur de lumière
JP2014505994A (ja) * 2010-11-22 2014-03-06 クリー インコーポレイテッド 発光デバイスおよび方法
US9194567B2 (en) 2011-02-16 2015-11-24 Cree, Inc. High voltage array light emitting diode (LED) devices and fixtures
US9203004B2 (en) 2010-11-22 2015-12-01 Cree, Inc. Light emitting devices for light emitting diodes (LEDs)
US9490235B2 (en) 2010-11-22 2016-11-08 Cree, Inc. Light emitting devices, systems, and methods
USD823492S1 (en) 2016-10-04 2018-07-17 Cree, Inc. Light emitting device
US10134961B2 (en) 2012-03-30 2018-11-20 Cree, Inc. Submount based surface mount device (SMD) light emitter components and methods
US11004890B2 (en) 2012-03-30 2021-05-11 Creeled, Inc. Substrate based light emitter devices, components, and related methods

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WO2008026508A1 (fr) * 2006-08-31 2008-03-06 Kyocera Corporation Circuit de commande de source de lumière, composant de source de lumière dotée du circuit de commande de source de lumière et appareil d'affichage
JP2009016094A (ja) * 2007-07-02 2009-01-22 Sharp Corp 照明装置及び照明装置の製造方法

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US9203004B2 (en) 2010-11-22 2015-12-01 Cree, Inc. Light emitting devices for light emitting diodes (LEDs)
US9209354B2 (en) 2010-11-22 2015-12-08 Cree, Inc. Light emitting devices for light emitting diodes (LEDs)
US9490235B2 (en) 2010-11-22 2016-11-08 Cree, Inc. Light emitting devices, systems, and methods
US9194567B2 (en) 2011-02-16 2015-11-24 Cree, Inc. High voltage array light emitting diode (LED) devices and fixtures
US10134961B2 (en) 2012-03-30 2018-11-20 Cree, Inc. Submount based surface mount device (SMD) light emitter components and methods
US11004890B2 (en) 2012-03-30 2021-05-11 Creeled, Inc. Substrate based light emitter devices, components, and related methods
WO2014010161A1 (fr) * 2012-07-12 2014-01-16 パナソニック株式会社 Module émetteur de lumière
JP5453580B1 (ja) * 2012-07-12 2014-03-26 パナソニック株式会社 発光モジュール
USD823492S1 (en) 2016-10-04 2018-07-17 Cree, Inc. Light emitting device

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