JP2005243377A - Backlight device - Google Patents

Backlight device Download PDF

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JP2005243377A
JP2005243377A JP2004050685A JP2004050685A JP2005243377A JP 2005243377 A JP2005243377 A JP 2005243377A JP 2004050685 A JP2004050685 A JP 2004050685A JP 2004050685 A JP2004050685 A JP 2004050685A JP 2005243377 A JP2005243377 A JP 2005243377A
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backlight
diffusion plate
plate
locked
light source
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JP4009259B2 (en
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Norihiko Kamishina
典彦 神志那
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Sharp Corp
シャープ株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent warping of a diffusing plate generated when lighting a backlight device. <P>SOLUTION: In the backlight device with a light source 2 arranged inside a case 1 of a shallow box shape and with a square diffusing plate 3 made of resin arranged in front of the light source 2, nearly a middle position of each of opposing long sides of the diffusing plate 3 is locked to the case 1, and at the same time, opposing short sides of the diffusing plate 3 are curved forward and locked to positions protruded by a suitable distance forward from the middle position. Further, it is also possible to have a middle part of each of the four sides of the diffusing plate 3 locked to the case 1, and at the same time, to have each corner part of the diffusing plate 3 curved forward and locked to a position protruded by a suitable distance forward from the middle position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、液晶テレビ等の光源として用いられるバックライト装置に関し、詳しくはバックライト装置を構成する拡散板が温度上昇や湿気吸収により端部に反りが発生しようとしても、それを強制的に規制することにより、光学シートにしわが発生しないように支持して均一な輝度が得られるバックライト装置に関する。   The present invention relates to a backlight device used as a light source for a liquid crystal television or the like. Specifically, even if a diffuser plate constituting the backlight device tries to warp an end portion due to temperature rise or moisture absorption, it is forcibly regulated. Thus, the present invention relates to a backlight device that can support the optical sheet so that wrinkles do not occur and obtain uniform brightness.
従来、液晶テレビ等の液晶表示装置に用いられるバックライト装置は、図6に示されるように、浅底箱状の反射板ベースプレート1内に光源である蛍光ランプ2を等間隔で配置し、その前方にアクリル板等からなる拡散板3を配置しその前面にITOシート、拡散フィルム、プリズムシート、反射偏光フィルム等の光学シート4を配置している。これら拡散板、各光学シートは互いに異なる材質からなるためそれぞれの膨張率が異なる。そのため、バックライト装置が点灯される度に、温度上昇して互いに異なる伸び量で膨張する。このとき各光学シートが互いに密着した状態にあると、バイメタルのように一方に反り返る現象が起こり、しわが発生してしまう。   Conventionally, a backlight device used in a liquid crystal display device such as a liquid crystal television has fluorescent lamps 2 as light sources arranged at equal intervals in a shallow box-like reflector base plate 1 as shown in FIG. A diffusion plate 3 made of an acrylic plate or the like is disposed in front, and an optical sheet 4 such as an ITO sheet, a diffusion film, a prism sheet, or a reflective polarizing film is disposed on the front surface thereof. Since these diffusing plates and optical sheets are made of different materials, their respective expansion rates are different. Therefore, each time the backlight device is turned on, the temperature rises and expands with different elongation amounts. If the optical sheets are in close contact with each other at this time, a phenomenon of bending to one side like bimetal occurs and wrinkles occur.

しわが発生すると、その前面の液晶パネルに陰が映り、輝度が不均一になるという問題が発生した。その対策として従来は、バックライト装置の照射面が垂直に支持される場合は、拡散板の上端部が当接する反射板ベースプレートの当接面に複数のピンを突設して、上端に孔を形成した拡散板、各光学シートをそのピンに係止し、拡散板、各光学シートをその自重で吊り下げた状態で保持していた。この状態では、各光学シートに厚み方向に外力が加わらずに、各光学シートは互いに自由に伸縮できるように保持されている。また、これら光学シートの端部をしわを発生することなく保持する技術として特許文献1に記載の液晶表示装置がある。
特開平11−281966号公報

When wrinkles occur, shadows appear on the front LCD panel, resulting in uneven brightness. Conventionally, as a countermeasure, when the irradiation surface of the backlight device is supported vertically, a plurality of pins are provided on the abutting surface of the reflector base plate with which the upper end of the diffusing plate abuts, and a hole is formed at the upper end. The formed diffusion plate and each optical sheet were locked to the pins, and the diffusion plate and each optical sheet were held in a state suspended by their own weight. In this state, the optical sheets are held so as to freely expand and contract with each other without applying an external force in the thickness direction to the optical sheets. Moreover, there is a liquid crystal display device described in Patent Document 1 as a technique for holding the end portions of these optical sheets without generating wrinkles.
JP-A-11-281966
ところで、液晶表示装置のバックライト装置では、光学シートのしわの発生原因として、上述した以外に、光学シートの背面に支持されている拡散板の湿気による影響がある。詳しくは、バックライト装置が置かれている雰囲気は完全な乾燥空気ではなく、その日の天候により増減する量の水分すなわち湿気が含まれており、その水分が比較的吸水性の大きい拡散板に吸収されている。その拡散板に吸収されている水分の量は、その日の雰囲気の湿度や、拡散板自体の温度により変化する。特に、バックライト装置の点灯開始時は、拡散板の表面側と背面側の間に温度勾配を生じて、表面側と背面側の間には吸収している水分量が大きく異なる時がある。   By the way, in the backlight device of a liquid crystal display device, the cause of wrinkling of the optical sheet is influenced by the moisture of the diffusion plate supported on the back surface of the optical sheet, as described above. Specifically, the atmosphere in which the backlight device is placed is not completely dry air, but contains an amount of moisture or moisture that increases or decreases depending on the weather of the day, and the moisture is absorbed by a diffusion plate with relatively high water absorption. Has been. The amount of moisture absorbed by the diffusion plate varies depending on the humidity of the atmosphere of the day and the temperature of the diffusion plate itself. In particular, when the backlight device is turned on, a temperature gradient is generated between the front surface side and the back surface side of the diffusion plate, and the amount of moisture absorbed is greatly different between the front surface side and the back surface side.

その結果、拡散板の表面側と背面側とでは、吸水して膨張する膨潤量の差が大きくなり片側に反るという現象が発生する。この現象は拡散板の表面側と背面側の温度勾配による熱膨張の影響も加わるため、複雑な挙動となることもあるが、通常の使用環境では拡散板の中央部分が前方に膨らみ、その反動として拡散板の周囲部分が後方に反るという傾向にある。このように、拡散板に反りが発生すると、拡散板の前面に自然吊り下げにより支持されている光学シートがその前面に配置されている液晶パネルとの間に挟まれてしまい、自由に伸びることができなくなる。また、拡散板の周囲も反りのため一部は前方に一部は後方に変形して、拡散板と一緒に押さえ金具に支持されている光学シートが拡散板に押圧されて、自由に移動できなくなる。

As a result, a phenomenon occurs in which the difference in the amount of swelling that expands by absorbing water between the front surface side and the back surface side of the diffusion plate increases and warps to one side. This phenomenon is also affected by the thermal expansion due to the temperature gradient on the front and back sides of the diffuser, which can lead to complex behavior, but in the normal operating environment, the central part of the diffuser swells forward and reacts. As a result, the peripheral portion of the diffusion plate tends to warp backward. As described above, when the diffusion plate is warped, the optical sheet supported by natural suspension on the front surface of the diffusion plate is sandwiched between the liquid crystal panel disposed on the front surface and freely extends. Can not be. Also, because the periphery of the diffusion plate is warped, part of it is deformed forward and part of it is rearwardly deformed, and the optical sheet supported by the holding metal fitting together with the diffusion plate is pressed against the diffusion plate and can move freely. Disappear.

その結果、光学シートの熱膨張した分がしわとなり、その前面の液晶パネルに陰が映り、輝度が不均一になるという問題が発生した。このように、拡散板に反りが発生する一つの要因として、拡散板が雰囲気の相対湿度の変化により水分の吸収と放出をする際に、拡散板中の厚み方向にいわば含水率の大小の勾配を生じて、その含水率の差に応じた膨張量に違いにより拡散板が反るということが推定できる。その対策として、反りの発生する以前に、発生する反りと反対方向に、予め拡散板を機械的に湾曲させておくことが考えられる。そこで、本発明は、平常時に平面であって矩形をした拡散板に、発生する反りの方向と反対方向に加圧して、バックライト装置の点灯開始時に発生する反りを打ち消すことにより輝度を安定させることを目的とした。

As a result, the thermal expansion of the optical sheet wrinkled, and a shadow was reflected on the liquid crystal panel on the front surface of the optical sheet, resulting in non-uniform brightness. As described above, one factor that causes the warpage of the diffusion plate is that when the diffusion plate absorbs and releases moisture due to a change in the relative humidity of the atmosphere, the gradient of the moisture content in the thickness direction in the diffusion plate. It can be estimated that the diffusion plate warps due to the difference in the expansion amount according to the difference in the moisture content. As a countermeasure, it is conceivable that the diffusion plate is mechanically curved in advance in the direction opposite to the warping before the warping occurs. Therefore, the present invention stabilizes the luminance by applying pressure to the flat and rectangular diffuser plate in the normal direction in the direction opposite to the direction of the generated warp to cancel the warp that occurs when the backlight device starts lighting. Aimed at that.
上記課題を解決するために、本発明は、光源の前方に樹脂からなる拡散板を配置したバックライト装置において、バックライト点灯時に前記拡散板に発生する反りの方向の反対方向に、予め前記拡散板を湾曲させたことを特徴とする。詳しくは、浅底箱状の筐体内に光源を配置し該光源の前方に樹脂からなる矩形の拡散板を配置したバックライト装置において、前記拡散板の相対する長辺のそれぞれの略中間位置を前記筐体側に係止するとともに、前記拡散板の相対する短辺部をそれぞれ前方に湾曲させて前記略中間位置よりも前方に適距離突出した位置に係止する。また、浅底箱状の筐体内に光源を配置し該光源の前方に樹脂からなる矩形の拡散板を配置したバックライト装置において、前記拡散板の4辺のそれぞれの略中間位置を前記筐体側に係止するとともに、前記拡散板の各角部をそれぞれ前方に湾曲させて前記略中間位置よりも前方に適距離突出した位置に係止する。   In order to solve the above-described problems, the present invention provides a backlight device in which a diffusion plate made of resin is disposed in front of a light source, and the diffusion is previously performed in a direction opposite to the direction of warpage generated in the diffusion plate when the backlight is turned on. The plate is curved. Specifically, in a backlight device in which a light source is arranged in a shallow box-shaped housing and a rectangular diffusion plate made of resin is arranged in front of the light source, the approximate middle positions of the opposing long sides of the diffusion plate are set. While locking to the housing side, the opposing short sides of the diffusion plate are bent forward and locked to a position protruding forward by an appropriate distance from the substantially intermediate position. Further, in a backlight device in which a light source is disposed in a shallow box-shaped housing and a rectangular diffusion plate made of resin is disposed in front of the light source, approximately intermediate positions of the four sides of the diffusion plate are set on the housing side. And the respective corners of the diffusion plate are bent forward and locked at positions protruding forward by an appropriate distance from the substantially intermediate position.

ここで、前記拡散板の略中間位置に対向する前記筐体の縁部を突出させて折り返すとともに該折り返し部により前記拡散板を係止することが可能である。また、前記拡散板の略中間位置に透孔を形成し該透孔にビスを挿入して前記筐体の縁部に螺着することにより前記拡散板を係止することが可能である。また、前記拡散板の略中間位置であって拡散板と前記筐体の縁部との外側に断面コ字形の留め具を嵌着して前記拡散板を係止することが可能である。

Here, it is possible to project and fold the edge of the housing facing the substantially intermediate position of the diffusion plate and to lock the diffusion plate by the folded portion. Further, it is possible to lock the diffusion plate by forming a through hole at a substantially intermediate position of the diffusion plate, inserting a screw into the through hole, and screwing the screw to the edge of the casing. In addition, it is possible to lock the diffusion plate by fitting a fastener having a U-shaped cross section on the outer side of the diffusion plate and the edge of the housing at a substantially intermediate position of the diffusion plate.
以上述べたように本発明によれば、光源の前方に樹脂からなる拡散板を配置したバックライト装置において、バックライト点灯時に前記拡散板に発生する反りの方向の反対方向に予め前記拡散板を湾曲させたことで、バックライトが点灯されて拡散板が反ろうとしても、規制されているため反ることが不可能となる。その結果、光学シートが拡散板の反りによって押圧されてしわを発生することがなくなり、バックライトの輝度が安定する。   As described above, according to the present invention, in the backlight device in which the diffusion plate made of resin is arranged in front of the light source, the diffusion plate is previously set in the direction opposite to the direction of the warp generated in the diffusion plate when the backlight is turned on. By curving, even if the backlight is turned on and the diffusion plate is warped, it is impossible to warp because it is regulated. As a result, the optical sheet is not pressed by the warp of the diffuser plate to generate wrinkles, and the backlight brightness is stabilized.
以下、図に基づいて本発明の実施形態を説明する。

図1は本発明に係るバックライト装置の正面図であり、図2は図1のA−A線断面図であり、図3は図1のB−B線断面図である。これらの図において、1はバックライト装置の筐体であるところの浅底箱状をした反射板ベースプレートであり、その内側に光源である蛍光ランプ2を等間隔で配置し、その前方にアクリル板等からなる矩形の拡散板3を配置し、その前面に図示しないがITOシート、拡散フィルム、プリズムシート、反射偏光フィルム等の光学シートが配置される。なお、図中の4は、拡散板3の中央部分が内側の蛍光ランプ2側に反ろうとしたときにそれを阻止するピンである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a front view of a backlight device according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. In these figures, reference numeral 1 is a reflector base plate having a shallow box shape which is a casing of a backlight device, fluorescent lamps 2 as light sources are arranged at equal intervals on the inside thereof, and an acrylic plate in front thereof A rectangular diffusion plate 3 made of, for example, is disposed, and an optical sheet such as an ITO sheet, a diffusion film, a prism sheet, or a reflective polarizing film is disposed on the front surface, although not shown. In addition, 4 in a figure is a pin which blocks | prevents it, when the center part of the diffusion plate 3 tries to warp to the inner side fluorescent lamp 2 side.

ここで、拡散板3の上下の長辺の中央部分で、反射板ベースプレート1の縁を突出させて内側に折り返し、その折り返し部1a,1bにより、拡散板3を内側に湾曲させた状態で係止する。拡散板3の左右の垂直方向の短辺部分は、拡散板3の中央部分が後方に押圧されたことで、同様に、後方に向かおうとする力が発生するが、短辺部分は反射板ベースプレート1の縁部分に当接して支持される。このとき、短辺部分に当接する反射板ベースプレート1の縁部分は、折り返し部1a,1bよりも前方に適距離突出されている。その結果、拡散板3は、図3の断面図の矢印に示されるように、中央部分が後方に押圧され、両端部分が前方に押圧されることにより、前方向に凹型に湾曲される。これは、バックライト装置の点灯時に発生する拡散板3の前方向に凸型の湾曲形状と反対の形状であり、このように予め、発生する湾曲形状と反対方向に拡散板3を湾曲させたことで、バックライト装置の点灯時に拡散板3が湾曲することを阻止することが可能となる。その結果、拡散板3の前面に配置される光学シートが、拡散板3の湾曲のために押圧されることがなくなってしわも発生せずに、バックライト装置の輝度が安定することになる。

Here, at the center part of the upper and lower long sides of the diffuser plate 3, the edge of the reflector base plate 1 is projected and folded inward, and the diffuser plate 1 is bent inward by the folded portions 1a and 1b. Stop. The short side portion in the left and right vertical direction of the diffuser plate 3 is similarly generated by a force toward the rear side when the central portion of the diffuser plate 3 is pressed backward, but the short side portion is a reflector. It is supported in contact with the edge portion of the base plate 1. At this time, the edge portion of the reflector base plate 1 that is in contact with the short side portion is projected forward by an appropriate distance from the folded portions 1a and 1b. As a result, as shown by the arrow in the cross-sectional view of FIG. 3, the diffusion plate 3 is curved in a concave shape in the forward direction by pressing the center portion backward and pressing both end portions forward. This is a shape opposite to the convex curved shape in the forward direction of the diffusion plate 3 generated when the backlight device is turned on, and thus the diffusion plate 3 is previously curved in the direction opposite to the generated curved shape. Thus, it is possible to prevent the diffusion plate 3 from being bent when the backlight device is turned on. As a result, the optical sheet disposed on the front surface of the diffusing plate 3 is not pressed due to the curvature of the diffusing plate 3 and wrinkles are not generated, and the brightness of the backlight device is stabilized.

図4は拡散板3の中央部分における係止部の他の形態を示す断面図である。図示例は、拡散板3の上下の長辺のそれぞれの中央部分に透孔を形成し、そこへビス5を挿入して、反射板ベースプレート1の縁に螺着したものである。この場合は、図2に例に比べ反射板ベースプレート1の縁を突出させることが不要となるとともに、拡散板3を確実に反射板ベースプレート1に固定することができる。

FIG. 4 is a cross-sectional view showing another form of the locking portion at the central portion of the diffusion plate 3. In the illustrated example, a through-hole is formed in the central part of each of the upper and lower long sides of the diffusing plate 3, and a screw 5 is inserted therein and screwed to the edge of the reflecting plate base plate 1. In this case, it is not necessary to project the edge of the reflector base plate 1 as compared with the example in FIG. 2, and the diffusing plate 3 can be securely fixed to the reflector base plate 1.

図5は拡散板3の中央部分における係止部の他の形態を示す断面図である。図示例は、拡散板3の上下の長辺のそれぞれの中央部分と、反射板ベースプレート1の縁との外側に、断面断面コ字形の留め具6を嵌着して、拡散板3を係止したものである。この場合は、図4に例に比べ、拡散板3に透孔を形成することが不要となる。

FIG. 5 is a cross-sectional view showing another form of the locking portion at the central portion of the diffusion plate 3. In the illustrated example, a fastener 6 having a U-shaped cross-sectional cross section is fitted to the outside of the center part of each of the upper and lower long sides of the diffuser plate 3 and the edge of the reflector plate base plate 1 to lock the diffuser plate 3. It is a thing. In this case, it is not necessary to form a through hole in the diffusion plate 3 as compared with the example shown in FIG.

なお、上述の実施形態は、いずれも拡散板3の長辺の中央部分を反射板ベースプレート1の縁に係止したものであるが、それに加えて、拡散板3の短辺の中央部分を反射板ベースプレート1の縁に係止し、拡散板3の4箇所の角部を前方に突出させて支持することも可能である。

In each of the above-described embodiments, the central part of the long side of the diffusion plate 3 is locked to the edge of the reflector base plate 1, but in addition, the central part of the short side of the diffusion plate 3 is reflected. It is also possible to engage with the edge of the plate base plate 1 and support the four corners of the diffusion plate 3 by protruding forward.
本発明は、液晶表示装置用のバックライト装置以外の他の表示形式のバックライト装置にも利用可能である。   The present invention is also applicable to backlight devices of other display formats other than the backlight device for liquid crystal display devices.
本発明に係るバックライト装置の正面図である。It is a front view of the backlight device according to the present invention. 図1のA−A線断面図である。It is the sectional view on the AA line of FIG. 図1のB−B線断面図である。It is the BB sectional view taken on the line of FIG. 拡散板の中央部分における係止部の他の形態を示す断面図である。It is sectional drawing which shows the other form of the latching | locking part in the center part of a diffusion plate. 拡散板の中央部分における係止部の他の形態を示す断面図である。It is sectional drawing which shows the other form of the latching | locking part in the center part of a diffusion plate. 従来例を示す断面図である。It is sectional drawing which shows a prior art example.
符号の説明Explanation of symbols

1 反射板ベースプレート

1a,1b 折り返し部

2 蛍光ランプ

3 拡散板

4 ピン

5 ビス

6 留め具

1 Reflector base plate

1a, 1b Folding part

2 Fluorescent lamp

3 Diffusion plate

4 pin

5 screws

6 Fastener

Claims (6)

  1. 光源の前方に樹脂からなる拡散板を配置したバックライト装置において、

    バックライト点灯時に前記拡散板に発生する反りの方向の反対方向に、予め前記拡散板を湾曲させたことを特徴とするバックライト装置。
    In the backlight device in which a diffusion plate made of resin is arranged in front of the light source,

    A backlight device, wherein the diffuser plate is curved in advance in a direction opposite to a direction of warp generated in the diffuser plate when the backlight is turned on.
  2. 浅底箱状の筐体内に光源を配置し該光源の前方に樹脂からなる矩形の拡散板を配置したバックライト装置において、

    前記拡散板の相対する長辺のそれぞれの略中間位置を前記筐体側に係止するとともに、前記拡散板の相対する短辺部をそれぞれ前方に湾曲させて前記略中間位置よりも前方に適距離突出した位置に係止したことを特徴とするバックライト装置。
    In a backlight device in which a light source is arranged in a shallow box-shaped housing and a rectangular diffusion plate made of resin is arranged in front of the light source,

    The substantially intermediate positions of the opposing long sides of the diffuser plate are locked to the housing side, and the opposing short sides of the diffuser plate are curved forward to each other at an appropriate distance forward of the substantially intermediate position. A backlight device that is locked at a protruding position.
  3. 浅底箱状の筐体内に光源を配置し該光源の前方に樹脂からなる矩形の拡散板を配置したバックライト装置において、

    前記拡散板の4辺のそれぞれの略中間位置を前記筐体側に係止するとともに、前記拡散板の各角部をそれぞれ前方に湾曲させて前記略中間位置よりも前方に適距離突出した位置に係止したことを特徴とするバックライト装置。
    In a backlight device in which a light source is arranged in a shallow box-shaped housing and a rectangular diffusion plate made of resin is arranged in front of the light source,

    The substantially intermediate position of each of the four sides of the diffusion plate is locked to the housing side, and each corner portion of the diffusion plate is bent forward to a position protruding forward by an appropriate distance from the substantially intermediate position. A backlight device characterized by being locked.
  4. 請求項2または3に記載のバックライト装置において、

    前記拡散板の略中間位置に対向する前記筐体の縁部を突出させて折り返すとともに該折り返し部により前記拡散板を係止したことを特徴とするバックライト装置。
    The backlight device according to claim 2 or 3,

    A backlight device characterized in that an edge of the housing facing the substantially intermediate position of the diffusion plate is projected and folded, and the diffusion plate is locked by the folded portion.
  5. 請求項2または3に記載のバックライト装置において、

    前記拡散板の略中間位置に透孔を形成し該透孔にビスを挿入して前記筐体の縁部に螺着することにより前記拡散板を係止したことを特徴とするバックライト装置。
    The backlight device according to claim 2 or 3,

    A backlight device characterized in that a through-hole is formed at a substantially intermediate position of the diffusion plate, a screw is inserted into the through-hole, and the diffusion plate is locked by being screwed to an edge of the casing.
  6. 請求項2または3に記載のバックライト装置において、

    前記拡散板の略中間位置であって拡散板と前記筐体の縁部との外側に断面コ字形の留め具を嵌着して前記拡散板を係止したことを特徴とするバックライト装置。
    The backlight device according to claim 2 or 3,

    A backlight device characterized in that a fastener having a U-shaped cross section is fitted on the outer side of the diffuser plate and the edge of the housing at approximately the middle position of the diffuser plate, thereby locking the diffuser plate.
JP2004050685A 2004-02-26 2004-02-26 Backlight device Expired - Fee Related JP4009259B2 (en)

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Cited By (5)

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JP2007086648A (en) * 2005-09-26 2007-04-05 Sharp Corp Liquid crystal display device
JP2009211933A (en) * 2008-03-04 2009-09-17 Sharp Corp Display device
WO2009157226A1 (en) * 2008-06-27 2009-12-30 シャープ株式会社 Backlight device, display device, and television receiver
JP2010113239A (en) * 2008-11-07 2010-05-20 Sharp Corp Display device
US9551894B2 (en) 2015-01-05 2017-01-24 Young Lighting Technology Inc. Display

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CN101862877B (en) * 2010-06-02 2011-11-30 何学才 Flame cutting system with insulation device for flame cutting zone of billet

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007086648A (en) * 2005-09-26 2007-04-05 Sharp Corp Liquid crystal display device
JP4707517B2 (en) * 2005-09-26 2011-06-22 シャープ株式会社 Liquid crystal display device
JP2009211933A (en) * 2008-03-04 2009-09-17 Sharp Corp Display device
WO2009157226A1 (en) * 2008-06-27 2009-12-30 シャープ株式会社 Backlight device, display device, and television receiver
US8388160B2 (en) 2008-06-27 2013-03-05 Sharp Kabushiki Kaisha Backlight device, display device, and television receiver
JP2010113239A (en) * 2008-11-07 2010-05-20 Sharp Corp Display device
US9551894B2 (en) 2015-01-05 2017-01-24 Young Lighting Technology Inc. Display

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