JP2005276716A - Backlight device - Google Patents

Backlight device Download PDF

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JP2005276716A
JP2005276716A JP2004090757A JP2004090757A JP2005276716A JP 2005276716 A JP2005276716 A JP 2005276716A JP 2004090757 A JP2004090757 A JP 2004090757A JP 2004090757 A JP2004090757 A JP 2004090757A JP 2005276716 A JP2005276716 A JP 2005276716A
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optical sheet
backlight device
holding
diffusion plate
fitting
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JP4084766B2 (en
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Masaya Katsuki
正也 香月
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Sharp Corp
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Sharp Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To stabilize brightness of a backlight device by improving dimensional precision of cross-sectional shape of a fixing metal in which edges of a diffusion plate and respective optical sheets are pressed, without causing wrinkles at the optical sheets. <P>SOLUTION: In the backlight device in which a light source is arranged in a box-shaped cabinet, in which the diffusion plate 2 and the optical sheets 3 are arranged in the frontward of the light source, in which edge parts of the diffusion plate 2 and the optical sheets 3 are retained at the cabinet part by the fixing metal 4 of the cross-sectional crank shape without pressurizing, and in which the remaining one piece except the retaining part of the fixing metal 4 is fixed by a screw 6, the fixing metal 4 is made by using a metal material and by means of extrusion molding. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、液晶テレビ等の液晶表示装置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および光学シートの縁部分を押さえる押さえ金具の寸法精度を向上することにより、拡散板および光学シートを押さえ金具が押さえ過ぎて加圧することなく最適な状態で支持するようにして、光学シートのしわの発生を防止し、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 of a liquid crystal display device such as a liquid crystal television, and more specifically, by improving the dimensional accuracy of a holding plate that holds an edge portion of a diffusion plate and an optical sheet constituting the backlight device, The present invention relates to a backlight device capable of preventing wrinkling of an optical sheet and obtaining uniform brightness by supporting a diffusion plate and an optical sheet in an optimal state without pressing the diffusion plate and the optical sheet too much.

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１に示されるように、箱状の筐体であるところのシャーシ１内に光源である蛍光ランプ（図示せず）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２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３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熱膨張率が異なる。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。   2. Description of the Related Art Conventionally, a backlight device used in a liquid crystal display device such as a liquid crystal television has a fluorescent lamp (not shown) as a light source in a chassis 1 which is a box-shaped housing as shown in FIG. Arranged at intervals, a diffusion plate 2 made of an acrylic plate or the like is arranged in front thereof, and an optical sheet 3 such as an ITO sheet, a diffusion film, a prism sheet, or a reflective polarizing film is arranged on the front surface thereof. Since these diffusion plates and optical sheets are made of different materials, their respective thermal expansion coefficients 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しわの陰が映り、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２、各光学シート３をそのピンに係止し、さらに、光学シート３の最上部を断面クランク形状の押さえ金具４でピンから抜け出ないように押さえていた。この状態で、拡散板２、各光学シート３はその自重で吊り下げられて支持され、同時に各光学シート３は押さえ金具４により厚み方向に加圧されずに適度な隙間を有して支持されており、各光学シートは温度が上昇した場合に、互いに自由に伸縮することができる。なお、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, the shadow of the wrinkles is reflected on the liquid crystal panel in front of the wrinkles, resulting in uneven brightness. Conventionally, as a countermeasure, when the irradiation surface of the backlight device is supported vertically, a plurality of pins are projected 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 2 and each optical sheet 3 were locked to the pins, and the uppermost portion of the optical sheet 3 was pressed by a press fitting 4 having a cross-sectional crank shape so as not to come out of the pins. In this state, the diffusing plate 2 and each optical sheet 3 are suspended and supported by their own weights, and at the same time, each optical sheet 3 is supported by the holding metal fitting 4 with a suitable gap without being pressed in the thickness direction. Each optical sheet can expand and contract freely when the temperature rises. Note that 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


このように、従来のバックライト装置は、ピンに係止された拡散板２、各光学シート３を、その縁部分で押さえ金具４により押圧することなく適度な隙間を介して保持していた。ところで、ここで用いられている断面クランク形状をした押さえ金具４は、従来、所定幅の鋼板を折り曲げて形成していた。そのため、図２に示されるように押さえ金具４の押さえ厚みの寸法ｓにバラツキが発生し、ｓ寸法が正規の寸法よりも短い場合は、拡散板２、各光学シート３を厚み方向に加圧することになり、温度が上昇した場合に、拡散板２、各光学シート３が互いに自由に伸縮することができなくなり、しわが発生して表示面に陰が映ることがあった。また、ｓ寸法が正規の寸法よりも長い場合は、隙間が大きくなり輸送中に拡散板２と各光学シート３がガタつくという問題が発生した。そこで本発明は、拡散板および各光学シートを押さえる断面クランク形状をした押さえ金具の断面形状の寸法精度を向上して、光学シートにしわを発生しないようにしてバックライト装置の輝度を安定させることを目的とした。
As described above, the conventional backlight device holds the diffusion plate 2 and the optical sheets 3 that are locked to the pins through an appropriate gap without being pressed by the pressing metal fitting 4 at the edge portion. Incidentally, the presser fitting 4 having a crank shape in cross section used here has been conventionally formed by bending a steel plate having a predetermined width. For this reason, as shown in FIG. 2, variation occurs in the holding thickness dimension s of the presser fitting 4, and when the s dimension is shorter than the normal dimension, the diffusion plate 2 and each optical sheet 3 are pressed in the thickness direction. In other words, when the temperature rises, the diffusion plate 2 and the optical sheets 3 cannot freely expand and contract each other, and wrinkles are generated and the display surface is shaded. In addition, when the s dimension is longer than the regular dimension, there is a problem that the gap becomes large and the diffusion plate 2 and each optical sheet 3 become loose during transportation. Accordingly, the present invention improves the dimensional accuracy of the cross-sectional shape of the diffuser plate and the holding bracket having a cross-sectional crank shape that holds each optical sheet, and stabilizes the brightness of the backlight device without causing wrinkles in the optical sheet. Aimed.

上記課題を解決するために、本発明は、光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を断面クランク形状の押さえ金具により加圧することなく保持したバックライト装置において、前記押さえ金具を押出成形により作成したことを特徴とする。   In order to solve the above-described problems, the present invention provides a diffusion plate and an optical sheet disposed in front of a light source, and the upper ends of the diffusion plate and the optical sheet are engaged with pins to be suspended. In the backlight device in which the edge portion is held without being pressed by a press fitting having a crank shape in cross section, the press fitting is produced by extrusion molding.

また、本発明は、箱状の筐体内に光源を配置し、該光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を断面クランク形状の押さえ金具により加圧することなく前記筐体部に保持し、前記押さえ金具の保持部でない他の一片を前記筐体部にビス止めしたバックライト装置において、前記押さえ金具を押出成形により作成したことを特徴とする。   In the present invention, the light source is disposed in a box-shaped housing, the diffusion plate and the optical sheet are disposed in front of the light source, and the upper ends of the diffusion plate and the optical sheet are engaged with the pins and suspended. A backlight in which an edge portion of the diffusion plate and the optical sheet is held by the casing portion without being pressed by a holding metal fitting having a crank shape in cross section, and another piece other than the holding portion of the holding fitting is screwed to the housing portion In the apparatus, the holding metal fitting is produced by extrusion molding.

さらに、本発明は、光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を押さえ金具により加圧することなく保持したバックライト装置において、前記押さえ金具の断面形状を片側が直線となる逆Ｙ字形にして押出成形により作成するとともに、下部二股部分の内側に拡散板および光学シートを保持したことを特徴とする。   Further, according to the present invention, a diffusion plate and an optical sheet are arranged in front of the light source, and the upper end portions of the diffusion plate and the optical sheet are engaged with the pins and suspended, and the edge portions of the diffusion plate and the optical sheet are pressed. In the backlight device held without pressurizing, the cross-sectional shape of the presser fitting is formed by extrusion forming an inverted Y shape in which one side is a straight line, and the diffusion plate and the optical sheet are held inside the lower bifurcated portion It is characterized by that.

またさらに、本発明は、箱状の筐体内に光源を配置し、該光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を押さえ金具により加圧することなく前記筐体部に保持し、前記押さえ金具の保持部でない他の一片を前記筐体部にビス止めしたバックライト装置において、前記押さえ金具の断面形状を片側が直線となる逆Ｙ字形にして押出成形により作成するとともに、下部二股部分の内側に拡散板および光学シートを保持したことを特徴とする。なお、前記拡散板および光学シートの上端部が係合されるピンを、前記押さえ金具の二股部分を横方向に貫通して支持することも可能である。   Still further, according to the present invention, a light source is disposed in a box-shaped housing, a diffusion plate and an optical sheet are disposed in front of the light source, and the upper end portion of the diffusion plate and the optical sheet is engaged with a pin and suspended. In the backlight device in which the edge portion of the diffuser plate and the optical sheet is held by the casing part without being pressed by a pressing metal, and the other piece that is not the holding part of the pressing metal is screwed to the casing. A cross-sectional shape of the presser fitting is formed in an inverted Y shape in which one side is a straight line by extrusion molding, and a diffusion plate and an optical sheet are held inside a lower bifurcated portion. In addition, it is also possible to support the pin with which the upper end part of the said diffusing plate and an optical sheet is engaged by penetrating the bifurcated part of the said press metal fitting in the horizontal direction.

以上述べたように本発明によれば、バックライト装置の拡散板および光学シートの縁部分を保持する断面クランク形状の押さえ金具を金属材にするとともに押出成形により作成したことで断面形状の寸法精度が向上してバラツキが少なくなり、拡散板および光学シートの縁部分を加圧することなく適度な隙間を介して保持することが可能になる。その結果、光学シートのしわの発生がなくなりバックライト装置の輝度が均一となる。   As described above, according to the present invention, the dimensional accuracy of the cross-sectional shape is obtained by using the metal plate for the cross-sectional crank-shaped holding metal fitting that holds the diffusion plate of the backlight device and the edge portion of the optical sheet, and by extrusion molding. As a result, the variation is reduced, and the diffusion plate and the edge portion of the optical sheet can be held through an appropriate gap without applying pressure. As a result, wrinkles of the optical sheet are eliminated and the brightness of the backlight device becomes uniform.

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第１の実施形態の上部の縦断面図であり、図２は図１中の押さえ金具の横断面図である。図１に示されるように、箱状の筐体であるところのシャーシ１内に光源である蛍光ランプ（図示せず）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２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３を配置している。光学シート３の前方には、液晶表示装置の場合は、液晶パネル５が配置される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of an upper portion of a first embodiment of a backlight device according to the present invention, and FIG. 2 is a cross-sectional view of a pressing metal fitting in FIG. As shown in FIG. 1, fluorescent lamps (not shown) as light sources are arranged at equal intervals in a chassis 1 which is a box-shaped housing, and a diffusion plate 2 made of an acrylic plate or the like is disposed in front of the fluorescent lamps. An optical sheet 3 such as an ITO sheet, a diffusion film, a prism sheet, or a reflective polarizing film is disposed on the front surface. In the case of a liquid crystal display device, a liquid crystal panel 5 is disposed in front of the optical sheet 3.


拡散板２および光学シート３の外周縁は、上下左右とも断面クランク形状をした押さえ金具４により、わずかな隙間を介して前方に移動しないように保持されている。押さえ金具４は外側の片部分がビス６によりシャーシ１に固定されている。この押さえ金具４は、従来、所定幅の鋼板を２回の折り曲げ工程により断面クランク形状に形成していたが、図２に示す押さえ厚みの寸法ｓにバラツキが発生し、寸法ｓが正規の寸法よりも短い場合は拡散板２および光学シート３を加圧して光学シート３にしわを発生させることがあった。そこで、本発明では、この押さえ金具４の寸法精度を向上させるため、アルミ材を用いた押出成形により作成することにした。その結果、押さえ厚みの寸法ｓの精度が向上してバラツキを無視できる程度に小さくすることができた。
The outer peripheral edges of the diffusing plate 2 and the optical sheet 3 are held so as not to move forward through a slight gap by a pressing metal 4 having a crank shape in cross section in the upper, lower, left and right directions. The holding metal fitting 4 is fixed to the chassis 1 with a screw 6 on the outer side. Conventionally, the presser fitting 4 has been formed in a cross-sectional crank shape by performing a two-fold bending process on a steel plate having a predetermined width. However, the presser thickness dimension s shown in FIG. 2 varies, and the dimension s is a normal dimension. If shorter, the diffusing plate 2 and the optical sheet 3 may be pressed to generate wrinkles in the optical sheet 3. Therefore, in the present invention, in order to improve the dimensional accuracy of the presser fitting 4, it is decided to perform the extrusion molding using an aluminum material. As a result, the accuracy of the pressing thickness dimension s was improved, and the variation could be reduced to such an extent that variations could be ignored.


このようにして、押さえ金具４の押さえ厚みの寸法ｓのバラツキが無視できる程度に小さくなると、拡散板２および光学シート３と押さえ金具４との間の隙間は、シャーシ１のビス６の取り付け面のレベルと拡散板２の厚さ寸法により一義的に決定されることになる。シャーシ１の取り付け面の仕上げは、通常機械加工により仕上げられるため百分の１ミリ程度の精度が得られるので、押さえ金具４により保持される部分の隙間も、百分の１ミリ程度の精度で隙間が管理可能となり、従来発生していた、隙間なく拡散板２および光学シート３が押さえ金具４により加圧されるという事態が解消されるようになった。その結果、光学シート３に発生するしわが解消され、輝度の安定したバックライト装置が得られるようになる。
In this way, when the variation of the holding thickness dimension s of the holding metal fitting 4 becomes small enough to be negligible, the gap between the diffusion plate 2 and the optical sheet 3 and the holding metal fitting 4 becomes the mounting surface of the screw 6 of the chassis 1. And the thickness of the diffusion plate 2 are uniquely determined. Since the finishing of the mounting surface of the chassis 1 is usually finished by machining, an accuracy of about 1/100 mm can be obtained. The gap can be managed, and the situation that the diffusion plate 2 and the optical sheet 3 are pressed by the holding metal fitting 4 without a gap, which has occurred in the past, has been solved. As a result, wrinkles generated in the optical sheet 3 are eliminated, and a backlight device with stable luminance can be obtained.


図３は本発明に係るバックライト装置の第２の実施形態における上部の押さえ金具の部分を示す縦断面図である。図に示される押さえ金具１１は、断面形状が片側を直線にした逆Ｙ字形に形成され、上述した第１の実施形態と同様に、アルミ材を用いた押出成形により作成される。押さえ金具１１は、上部の取付孔１２にビス１３を挿通して、図示しないシャーシに固定される。押さえ金具１１の下部の二股に別れた部分に、拡散板２および光学シート３が下方から挿入されるとともに、拡散板２および光学シート３の上端に形成された係止孔１４に、押しピン１５が挿入されて、拡散板２および光学シート３がバックライト装置前面に吊り下げ支持される。
FIG. 3 is a longitudinal sectional view showing a portion of the upper pressing metal fitting in the second embodiment of the backlight device according to the present invention. The holding metal fitting 11 shown in the figure is formed in an inverted Y shape with a cross-sectional shape that is straight on one side, and is produced by extrusion using an aluminum material, as in the first embodiment described above. The presser fitting 11 is fixed to a chassis (not shown) by inserting a screw 13 through the upper mounting hole 12. The diffusion plate 2 and the optical sheet 3 are inserted from below into the lower part of the presser metal 11 and the push pin 15 is inserted into the locking hole 14 formed at the upper ends of the diffusion plate 2 and the optical sheet 3. Is inserted, and the diffusion plate 2 and the optical sheet 3 are suspended and supported on the front surface of the backlight device.


押しピン１５の首下根元部分に雄ねじ部１６が形成されており、この雄ねじ部１６が、押さえ金具１１の下部手前側に形成された雌ねじ部１７に螺着される。押しピン１５の先端丸棒部分が、拡散板２および光学シート３の係止孔１４を挿通して、押さえ金具１１の下部奥側に形成された大径孔１８の内側に保持される。この実施形態では、拡散板２および光学シート３の上端係止部分が、押さえ金具１１の下部の二股部分の内側で吊り下げ支持されるため、拡散板２および光学シート３の厚さ方向の隙間は、押さえ金具１１の下部の二股部分の間隔により決定されることになる。この二股部分の間隔の精度は、押さえ金具１１が押出成形により作成されるため、バラツキが少なく極めて高精度である。
A male screw portion 16 is formed at the base of the neck of the push pin 15, and this male screw portion 16 is screwed to a female screw portion 17 formed on the lower front side of the presser fitting 11. The tip round bar portion of the push pin 15 is inserted through the locking hole 14 of the diffusion plate 2 and the optical sheet 3 and is held inside the large diameter hole 18 formed on the lower back side of the presser fitting 11. In this embodiment, since the upper end locking portions of the diffusion plate 2 and the optical sheet 3 are supported by being suspended inside the lower bifurcated portion of the presser fitting 11, a gap in the thickness direction between the diffusion plate 2 and the optical sheet 3 is supported. Is determined by the distance between the lower forked portion of the presser fitting 11. The accuracy of the distance between the forked portions is extremely high with little variation because the presser fitting 11 is formed by extrusion molding.


それにより、押さえ金具１１の下部の二股部分内での、拡散板２および光学シート３の厚さ方向の隙間は、所定の値に保持され、バラツキにより隙間が大きくなったり、反対に小さくなって拡散板２および光学シート３を密着させることが解消される。その結果、光学シート３に発生するしわが解消され、輝度の安定したバックライト装置が得られるようになる。また、この実施形態では、拡散板２および光学シート３を押さえ金具１１の二股部分で挟んで支持しているため、それらの間の隙間に関しては、押さえ金具１１とシャーシとの当接面における凹凸等の当接状態と無関係となる。その結果、押さえ金具１１が当接されるシャーシの面を過度に精密に機械仕上げをする必要がなくなり、その分コストダウンにもなる。
Thereby, the gap in the thickness direction of the diffusion plate 2 and the optical sheet 3 in the bifurcated portion of the lower portion of the presser fitting 11 is maintained at a predetermined value, and the gap becomes larger or becomes smaller due to variation. Adhering the diffusion plate 2 and the optical sheet 3 is eliminated. As a result, wrinkles generated in the optical sheet 3 are eliminated, and a backlight device with stable luminance can be obtained. Further, in this embodiment, since the diffusion plate 2 and the optical sheet 3 are sandwiched and supported by the bifurcated portion of the presser metal 11, the gap between them is uneven on the contact surface between the presser metal 11 and the chassis. It becomes irrelevant to the contact state. As a result, it is not necessary to machine finish the surface of the chassis with which the presser fitting 11 comes into contact with excessive precision, and the cost is reduced accordingly.

本発明は、バックライト装置の拡散板および光学シートを保持する押さえ金具以外に、パネル等を押圧保持する金具にも利用することが可能である。   The present invention can be used for a metal fitting for holding a panel or the like in addition to a metal fitting for holding a diffusion plate and an optical sheet of a backlight device.

本発明に係るバックライト装置の第１の実施形態における上部の縦断面図である。It is a longitudinal cross-sectional view of the upper part in 1st Embodiment of the backlight apparatus which concerns on this invention. 図１中の押さえ金具の横断面である。It is a cross section of the pressing metal fitting in FIG. 本発明に係るバックライト装置の第２の実施形態における上部の押さえ金具の部分を示す縦断面図である。It is a longitudinal cross-sectional view which shows the part of the upper pressing metal fitting in 2nd Embodiment of the backlight apparatus which concerns on this invention.

符号の説明Explanation of symbols


１ シャーシ

２ 拡散板

３ 光学シート

４ 押さえ金具

５ 液晶パネル

６ ビス

１１ 押さえ金具

１２ 取付孔

１３ ビス

１４ 係止孔

１５ 押しピン

１６ 雄ねじ部

１７ 雌ねじ部

１８ 大径孔
1 Chassis

2 Diffuser

3 Optical sheet

4 Presser bracket

5 LCD panel

6 screws

11 Presser bracket

12 Mounting hole

13 screws

14 Locking hole

15 Push pin

16 Male thread

17 Female thread

18 Large diameter hole

Claims (5)

光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を断面クランク形状の押さえ金具により加圧することなく保持したバックライト装置において、

前記押さえ金具を押出成形により作成したことを特徴とするバックライト装置。 A diffusing plate and an optical sheet are arranged in front of the light source, and the upper end portions of the diffusing plate and the optical sheet are suspended by being engaged with pins, and the edge portions of the diffusing plate and the optical sheet are added by holding parts having a crank shape in cross section. In the backlight device held without pressure,

A backlight device, wherein the presser fitting is produced by extrusion molding. 箱状の筐体内に光源を配置し、該光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を断面クランク形状の押さえ金具により加圧することなく前記筐体部に保持し、前記押さえ金具の保持部でない他の一片を前記筐体部にビス止めしたバックライト装置において、

前記押さえ金具を押出成形により作成したことを特徴とするバックライト装置。 A light source is disposed in a box-shaped housing, a diffuser plate and an optical sheet are disposed in front of the light source, and the upper ends of the diffuser plate and the optical sheet are engaged with pins and suspended, and the diffuser plate and the optical sheet In the backlight device in which the edge portion of the holding portion is held by the casing portion without being pressed by a holding metal fitting having a crank-shaped cross section, and the other piece that is not the holding portion of the holding fitting is screwed to the housing portion.

A backlight device, wherein the presser fitting is produced by extrusion molding. 光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を押さえ金具により加圧することなく保持したバックライト装置において、

前記押さえ金具の断面形状を片側が直線となる逆Ｙ字形にして押出成形により作成するとともに、下部二股部分の内側に拡散板および光学シートを保持したことを特徴とするバックライト装置。 A diffuser plate and an optical sheet are arranged in front of the light source, and the upper end portions of the diffuser plate and the optical sheet are suspended by being engaged with pins, and the edge portions of the diffuser plate and the optical sheet are held without being pressed by a pressing metal fitting. In the backlight device,

A backlight device characterized in that a cross-sectional shape of the presser fitting is formed into an inverted Y shape in which one side is a straight line by extrusion molding, and a diffusion plate and an optical sheet are held inside a lower bifurcated portion. 箱状の筐体内に光源を配置し、該光源の前方に拡散板および光学シートを配置し、該拡散板および光学シートの上端部をピンに係合して吊り下げ、前記拡散板および光学シートの縁部分を押さえ金具により加圧することなく前記筐体部に保持し、前記押さえ金具の保持部でない他の一片を前記筐体部にビス止めしたバックライト装置において、

前記押さえ金具の断面形状を片側が直線となる逆Ｙ字形にして押出成形により作成するとともに、下部二股部分の内側に拡散板および光学シートを保持したことを特徴とするバックライト装置。 A light source is disposed in a box-shaped housing, a diffuser plate and an optical sheet are disposed in front of the light source, and the upper ends of the diffuser plate and the optical sheet are engaged with pins and suspended, and the diffuser plate and the optical sheet In the backlight device in which the edge portion of the holding portion is held by the casing portion without being pressed by the holding fitting, and the other piece that is not the holding portion of the holding fitting is screwed to the casing portion,

A backlight device characterized in that a cross-sectional shape of the presser fitting is formed into an inverted Y shape in which one side is a straight line by extrusion molding, and a diffusion plate and an optical sheet are held inside a lower bifurcated portion. 請求項３または４に記載のバックライト装置において、

前記拡散板および光学シートの上端部が係合されるピンを、前記押さえ金具の二股部分を横方向に貫通して支持したことを特徴とするバックライト装置。 The backlight device according to claim 3 or 4,

A backlight device characterized in that a pin with which the upper end portion of the diffusion plate and the optical sheet is engaged is supported by penetrating the bifurcated portion of the presser fitting in the lateral direction.
JP2004090757A 2004-03-26 2004-03-26 Backlight device Expired - Fee Related JP4084766B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007114590A (en) * 2005-10-21 2007-05-10 Sharp Corp Liquid crystal display device and method for attaching optical sheet
WO2008146498A1 (en) 2007-05-31 2008-12-04 Sharp Kabushiki Kaisha Display device and tv receiver
US9684123B2 (en) 2013-06-27 2017-06-20 Sakai Display Products Corporation Display device and television receiver
US9939679B2 (en) 2013-07-19 2018-04-10 Sakai Display Products Corporation Display device
US9977176B2 (en) 2013-05-15 2018-05-22 Sakai Display Products Corporation Backlight device and display apparatus
CN109375423A (en) * 2018-12-26 2019-02-22 上海创功通讯技术有限公司 The production method of backlight, display screen, electronic product and backlight

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11259027A (en) * 1998-03-06 1999-09-24 Sun Mall Denshi Kk Led display board and its installation mechanism
JP2001013888A (en) * 1999-07-01 2001-01-19 Toshiba Corp Plane display device
JP2002072353A (en) * 2000-09-05 2002-03-12 Seiko Epson Corp Projector
JP2002196312A (en) * 2000-12-25 2002-07-12 Hitachi Ltd Liquid crystal display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11259027A (en) * 1998-03-06 1999-09-24 Sun Mall Denshi Kk Led display board and its installation mechanism
JP2001013888A (en) * 1999-07-01 2001-01-19 Toshiba Corp Plane display device
JP2002072353A (en) * 2000-09-05 2002-03-12 Seiko Epson Corp Projector
JP2002196312A (en) * 2000-12-25 2002-07-12 Hitachi Ltd Liquid crystal display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007114590A (en) * 2005-10-21 2007-05-10 Sharp Corp Liquid crystal display device and method for attaching optical sheet
WO2008146498A1 (en) 2007-05-31 2008-12-04 Sharp Kabushiki Kaisha Display device and tv receiver
US8079725B2 (en) 2007-05-31 2011-12-20 Sharp Kabushiki Kaisha Display device and TV receiver
US9977176B2 (en) 2013-05-15 2018-05-22 Sakai Display Products Corporation Backlight device and display apparatus
US9684123B2 (en) 2013-06-27 2017-06-20 Sakai Display Products Corporation Display device and television receiver
US9939679B2 (en) 2013-07-19 2018-04-10 Sakai Display Products Corporation Display device
CN109375423A (en) * 2018-12-26 2019-02-22 上海创功通讯技术有限公司 The production method of backlight, display screen, electronic product and backlight
CN109375423B (en) * 2018-12-26 2022-02-22 上海创功通讯技术有限公司 Backlight plate, display screen, electronic product and manufacturing method of backlight plate

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