JP3366589B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP3366589B2 JP3366589B2 JP02081599A JP2081599A JP3366589B2 JP 3366589 B2 JP3366589 B2 JP 3366589B2 JP 02081599 A JP02081599 A JP 02081599A JP 2081599 A JP2081599 A JP 2081599A JP 3366589 B2 JP3366589 B2 JP 3366589B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- crystal display
- display device
- light guide
- 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.)
- Expired - Fee Related
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明はエッジライト方式の
照明装置（バックライト）を備えた液晶表示装置に関す
るものである。
【０００２】
【従来の技術】今日、バックライトを備えた液晶表示装
置が使用されているが、近年の低消費電力化という市場
要求に応えるために、従来の冷陰極管に代えて、消費電
力が大幅に削減される発光ダイオードを使用する技術が
提案されている。
【０００３】図８〜図１０は発光ダイオード（以下、発
光ダイオードをＬＥＤと記す）を用いたバックライト型
液晶表示装置である（特開平１０−２６０４０４および
特開平１０−３０１５１４参照）。
【０００４】図８は液晶表示装置１の一部破断した平面
図、図９は図７のＸ−Ｘ線の断面図、図１０はバックラ
イト２の概略平面図である。
【０００５】液晶表示装置１は画像表示をおこなう液晶
表示体３とバックライト２とかなり、双方をベゼル４に
より囲んでいる。液晶表示体３には実質上画像表示がお
こなわれる有効表示領域５が定められ、バックライト２
には有効表示領域５と対面して、ほぼ同形状かつ同面積
でもって有効発光領域６が設定されている。
【０００６】バックライト２は矩形状の導光板７と、導
光板７の裏面および側面に設けた反射シート８と、他面
に配した光拡散シート９とレンズシート１０とからな
り、さらに導光板７の二つの角部にＰＣＢなどからなる
三角形状板のリフレクタ１４を配設し、リフレクタ１４
の側面にパッドを設け、その上にＬＥＤ１１、１２を半
田付けにより実装する。また、導光板７の角部には各Ｌ
ＥＤ１１、１２の光出射方向に対し弧状の切欠部１３を
形成し、切欠部１３より導光板７の内部に光が進入する
構成である。
【０００７】上記構成の液晶表示装置１によれば、ＬＥ
Ｄ１１、１２の出射光の一部がリフレクタ１４により反
射されながらも、図１０に示されるように切欠部１３よ
り導光板７の内部に入射され、その内部にて反射シート
８でもって反射されながら、光拡散シート９とレンズシ
ート１０を通して液晶表示体３に入射される。
【０００８】
【発明が解決しようとする課題】しかしながら、液晶表
示装置１においては、指向性をもつＬＥＤ１１、１２を
導光板７の角部に配設していることで、有効発光領域６
の全面にわたって均一な輝度が得られず、図１０に示す
ようにＬＥＤ１１、１２によりはさまれるほぼ中央付近
では光の到達度合いが小さくなり（このような中央付近
を図１０中斜線部分のデッドスペース１５でもって示
す）、そのために他の領域に比べて輝度が低いなり、輝
度ムラが発生していた。
【０００９】したがって本発明の目的は導光板の有効発
光領域における輝度を均一化した液晶表示装置を提供す
ることにある。
【００１０】
【課題を解決するための手段】本発明の液晶表示装置
は、少なくとも２つの角部に点状光源を配設した矩形状
の導光体の一方主面および側面に光反射部材を、他方主
面に光散乱部材を設けたバックライトの光散乱部材上に
液晶表示体を載設した液晶表示装置であって、前記導光
体における２つの角部の間に切り込み部を導光板の有効
発光領域外に設け、該切り込み部の側面に光反射部材を
設け、さらに上記切り込み部は導光板の側面のほぼ中央
部に大きな切り込みを成し、この大きな切り込みの両側
に対称的に小さな切り込みを成したことを特徴とする。
【００１１】
【発明の実施の形態】本発明の液晶表示装置を図１〜図
７により説明する。図１は液晶表示装置１６の一部破断
した平面図、図２は図１のＹ−Ｙ線の断面図、図３はバ
ックライト１７の要部拡大平面図である。図４は他のバ
ックライト１７ａの要部拡大平面図、図５は他のバック
ライト１７ｂの概略平面図、図６は他のバックライト１
７ｃの要部拡大平面図、図７は他のバックライト１７ｄ
の要部拡大平面図である。なお、従来の液晶表示装置１
と同一箇所には同一符号を付す。ただし、図４に示すバ
ックライト１７ａと図５に示すバックライト１７ｂは参
考例として示す。
【００１２】液晶表示装置１６は液晶表示体３とバック
ライト１７とをベゼル４により囲んだ構造であって、液
晶表示体３に定めた有効表示領域５と、バックライト１
７に定めた有効発光領域６は対面して、ほぼ同形状かつ
同面積である。
【００１３】バックライト１７は透明なアクリル樹脂か
らなる矩形状もしくはクサビ状の導光板１８と、導光板
１８の裏面および端面（側面）に設けた反射シート１９
（たとえば、ＰＥＴ等の白色シートの表面に反射層が設
けたもの）と、他面に配した光拡散シート９（ＰＣ、Ｐ
ＥＴ等の白色シートのいずれか一方の面に微細な凹凸
（たとえばエンボス加工等）が施されたもの）とレンズ
シート１０とからなり、さらに導光板１８の２つの角部
には前記点状光源であるＬＥＤ１１、１２を配設し、各
ＬＥＤ１１、１２の光出射方向に対し弧状の切欠部１３
を形成し、ＬＥＤ１１、１２の裏側にリフレクタ１４を
配設し、リフレクタ１４にＬＥＤ１１、１２が固定され
る。そして、切欠部１３より導光板１８の内部に光が進
入する。
【００１４】そして、ＬＥＤ１１、１２にてはさまれる
導光板１８の一側面のほぼ中央部に大きな三角形状の切
り込みを有効発光領域６外にておこない（三角大切り込
み部２０）、三角大切り込み部２０の両側に対称的に小
さな三角形状の切り込みをおこなっている（三角小切り
込み部２１、２２）。さらに各三角大切り込み部２０、
三角小切り込み部２１、２２の切り込み角θがほぼ９０
度の二等辺三角形にしている。
【００１５】このような三角大切り込み部２０、三角小
切り込み部２１、２２を形成することで、図３に示すよ
うに、たとえばＬＥＤ１２の出射光の一部が三角小切り
込み部２２に設けた反射シート１９でもって反射され、
その反射光が図１０に示すような光の到達度合いが小さ
いデッドスペース１５に達することで、輝度の補完がお
こなわれる。同様にＬＥＤ１１の出射光の一部は三角小
切り込み部２１に設けた反射シート１９でもって反射さ
れ、その反射光が領域１５に達する。さらに三角大切り
込み部２０については、ＬＥＤ１１、１２の出射光の一
部が到達することで、同様にその反射光が領域１５に達
する。
【００１６】かくして上記構成の液晶表示装置１６にお
いては、三角大切り込み部２０、三角小切り込み部２
１、２２を設けることで、導光板１８の有効発光領域６
の全面にわたって出射光の均斉度が上がり、均等な輝度
が得られる。しかも、ＬＥＤ１１、１２の出射光のうち
導光板１８の有効発光領域６外に向かう光が有効に有効
発光領域６に導入されることで、輝度が高くなった。
【００１７】上記液晶表示装置１６においては、切り込
み部として切り込み角θがほぼ９０度の二等辺三角形に
したが、これに代えて図４に示すバックライト１７ａの
ように直角三角形の大切り込み部２３、中切り込み部２
４、小切り込み部２５を順次形成してもよい。そして、
このような順序でもって切り込み深さを小さくすること
で、いずれに対してもＬＥＤ１２から直に光投射され
る。
【００１８】また、ＬＥＤ１１もしくはＬＥＤ１２に対
し、それぞれ複数の切り込み部を形成した場合には、異
なる切り込み角θを設定してもよい。たとえば、大切り
込み部２３の切り込み角θ１、中切り込み部２４の切り
込み角θ２、小切り込み部２５の切り込み角θ３につい
ては、θ１＜θ２＜θ３にすることで、反射光の誘導先
をピンポイントに設定してもよく、これにより、輝度の
低いデッドスペース１５に対し光を集中させることがで
き、その結果、もっとも優位に輝度ムラが解消される。
【００１９】さらに図５に示すバックライト１７ｂのよ
うに導光板１８ａのすべての角部にＬＥＤ２６、２７、
２８、２９を配設し、そして、いずれの側面に対しても
長手方向にわたって切り込み部３０を形成してもよい。
【００２０】ちなみに、このように矩形状の導光板の各
角部すべてにＬＥＤを配設し、さらにすべての側面に切
り込み部を設ける構造であれば、２個のＬＥＤを配設し
たバックライト１７に比べ、さらに輝度ムラが解消さ
れ、もっとも優位に本発明の目的が達成される。
【００２１】また、上述した各実施形態例では、いずれ
も切り込み部の先を鋭角、直角または鈍角にしている
が、これらに代えて頂点部分をＲ加工してもよい。ある
いは図６に示すバックライト１７ｃのように導光板１８
ｂに弧状もしくは半円状にした切り込み部３１にした
り、図７に示すバックライト１７ｄのように導光板１８
ｃに多角形状にした切り込み部３２にしてもよく、この
形状の切り込み部を一側面に１個もしくは複数個設け
る。
【００２２】なお、本発明は上記実施形態例に限定され
るものではなく、本発明の要旨を逸脱しない範囲内で種
々の変更や改良等はなんら差し支えない。たとえば前記
バックライト１７では導光板１８の２つの角部にはＬＥ
Ｄ１１、１２を配設し、さらに三角大切り込み部２０、
三角小切り込み部２１、２２を形成しているが、これに
代えて四隅の角部にＬＥＤを配設し、各側面のいずれに
も同様な切り込み部を形成してもよい。また、側面に形
成する切り込み部数も１個、２個もしくは４個、５個、
６個以上にしてよい。
【００２３】
【発明の効果】以上のとおり、本発明の液晶表示装置に
よれば、バックライトの導光板の有効発光領域外におけ
る側面に切り込み部を設けたことで、点状光源の出射光
のうち切り込み部に至った光が、有効発光領域における
輝度が低いデッドスペースに入り、これにより、導光板
の有効発光領域の全面にわたって出射光の均斉度が上が
り、均等な輝度が得られ、しかも、導光板の有効発光領
域外に向かう光が有効に有効発光領域に導入され、その
結果、高い輝度でもって有効表示領域に均等に光入射さ
れた高性能な液晶表示装置が提供できた。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device provided with an edge light type illumination device (backlight). 2. Description of the Related Art Today, a liquid crystal display device having a backlight is used. However, in order to meet the recent market demand for low power consumption, a conventional cold cathode tube is used instead of a conventional cold cathode tube. A technique using a light emitting diode in which the light emission is greatly reduced has been proposed. FIGS. 8 to 10 show a backlight type liquid crystal display device using a light emitting diode (hereinafter, the light emitting diode is referred to as an LED) (see JP-A-10-260404 and JP-A-10-301514). FIG. 8 is a partially cutaway plan view of the liquid crystal display device 1, FIG. 9 is a sectional view taken along line XX of FIG. 7, and FIG. 10 is a schematic plan view of the backlight 2. The liquid crystal display device 1 includes a liquid crystal display 3 for displaying images and a backlight 2, both of which are substantially surrounded by a bezel 4. The liquid crystal display 3 has an effective display area 5 in which an image is displayed substantially.
, An effective light emitting region 6 having substantially the same shape and the same area is set facing the effective display region 5. The backlight 2 comprises a rectangular light guide plate 7, a reflection sheet 8 provided on the back and side surfaces of the light guide plate 7, a light diffusion sheet 9 and a lens sheet 10 provided on the other surface, and further comprises a light guide plate. 7, a reflector 14 of a triangular plate made of PCB or the like is disposed at the two corners.
Are provided on the side surfaces of the LED, and the LEDs 11 and 12 are mounted thereon by soldering. Each L is provided at a corner of the light guide plate 7.
An arc-shaped notch 13 is formed in the light emission direction of the EDs 11 and 12, and light enters the light guide plate 7 from the notch 13. According to the liquid crystal display device 1 having the above configuration, the LE
While a part of the outgoing light of D11 and D12 is reflected by the reflector 14, the light enters the light guide plate 7 from the notch 13 as shown in FIG. 10 and is reflected by the reflection sheet 8 therein. The light enters the liquid crystal display 3 through the light diffusion sheet 9 and the lens sheet 10. However, in the liquid crystal display device 1, the LEDs 11 and 12 having directivity are arranged at the corners of the light guide plate 7, so that the effective light emitting region 6 is formed.
10, uniform light intensity cannot be obtained over the entire surface, and as shown in FIG. 10, the degree of arrival of light is reduced near the center between the LEDs 11 and 12 (the vicinity of the center is a dead space indicated by a hatched portion in FIG. 10). 15), the luminance was lower than in other areas, and luminance unevenness occurred. Accordingly, it is an object of the present invention to provide a liquid crystal display device in which the luminance in the effective light emitting area of the light guide plate is made uniform. According to the liquid crystal display device of the present invention, a light reflecting member is provided on one main surface and a side surface of a rectangular light guide having a point light source disposed at at least two corners. A liquid crystal display device having a liquid crystal display mounted on a light scattering member of a backlight having a light scattering member provided on the other main surface, wherein a notch portion is provided between two corners of the light guide. And a light reflecting member is provided on the side surface of the cut portion, and the cut portion forms a large cut substantially in the center of the side surface of the light guide plate, and small cuts are formed symmetrically on both sides of the large cut. It is characterized by notching. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to the present invention will be described with reference to FIGS. 1 is a partially cutaway plan view of the liquid crystal display device 16, FIG. 2 is a cross-sectional view taken along line YY of FIG. 1, and FIG. 4 is an enlarged plan view of a main part of another backlight 17a, FIG. 5 is a schematic plan view of another backlight 17b, and FIG.
7c is an enlarged plan view of a main part of FIG. 7c, and FIG.
3 is an enlarged plan view of a main part of FIG. The conventional liquid crystal display device 1
The same reference numerals are used for the same parts. However, the backlight 17a shown in FIG. 4 and the backlight 17b shown in FIG. 5 are shown as reference examples. The liquid crystal display device 16 has a structure in which the liquid crystal display 3 and the backlight 17 are surrounded by the bezel 4, and the effective display area 5 defined in the liquid crystal display 3 and the backlight 1 are provided.
The effective light emitting areas 6 defined in 7 have substantially the same shape and the same area. The backlight 17 includes a rectangular or wedge-shaped light guide plate 18 made of a transparent acrylic resin, and a reflection sheet 19 provided on the back surface and the end surface (side surface) of the light guide plate 18.
(For example, a reflective sheet is provided on the surface of a white sheet such as PET) and a light diffusion sheet 9 (PC, P
A white sheet such as ET is made up of fine irregularities (for example, embossed or the like) on one surface and a lens sheet 10. Further, the point light source is provided at two corners of the light guide plate 18. LEDs 11 and 12 are provided, and arc-shaped notches 13 are formed in the light emitting directions of the LEDs 11 and 12.
Is formed, and the reflector 14 is disposed on the back side of the LEDs 11 and 12, and the LEDs 11 and 12 are fixed to the reflector 14. Then, light enters the inside of the light guide plate 18 through the cutout portion 13. A large triangular cut is made outside the effective light emitting area 6 at a substantially central portion of one side of the light guide plate 18 sandwiched between the LEDs 11 and 12 (a large triangular cut 20). A small triangular incision is made symmetrically on both sides of 20 (triangular small incisions 21, 22). Furthermore, each triangular large cut section 20,
The cut angle θ of the small triangular cut portions 21 and 22 is approximately 90
The degree is an isosceles triangle. By forming such large triangular cuts 20 and small triangular cuts 21 and 22, for example, as shown in FIG. Reflected by sheet 19,
When the reflected light reaches the dead space 15 where the degree of light arrival as shown in FIG. 10 is small, the luminance is complemented. Similarly, a part of the light emitted from the LED 11 is reflected by the reflection sheet 19 provided in the small triangular cut portion 21, and the reflected light reaches the region 15. Further, with respect to the large triangular cut portion 20, when a part of the light emitted from the LEDs 11 and 12 reaches, the reflected light similarly reaches the region 15. Thus, in the liquid crystal display device 16 having the above configuration, the large triangular cut portion 20, the small triangular cut portion 2
1 and 22, the effective light emitting area 6 of the light guide plate 18 is provided.
The uniformity of the emitted light is increased over the entire surface, and uniform brightness is obtained. Moreover, of the light emitted from the LEDs 11 and 12, light traveling outside the effective light emitting region 6 of the light guide plate 18 is effectively introduced into the effective light emitting region 6, thereby increasing the luminance. In the liquid crystal display device 16 described above, the cut portion is formed as an isosceles triangle having a cut angle θ of approximately 90 degrees. Instead of this, a large cut portion 23 of a right triangular shape like a backlight 17a shown in FIG. , Middle notch 2
4. The small cut portions 25 may be sequentially formed. And
By reducing the cutting depth in such an order, the light is directly projected from the LED 12 to any of them. When a plurality of cut portions are formed in each of the LED 11 and the LED 12, a different cut angle θ may be set. For example, regarding the cut angle θ1 of the large cut portion 23, the cut angle θ2 of the middle cut portion 24, and the cut angle θ3 of the small cut portion 25, by setting θ1 <θ2 <θ3, the reflected light can be guided to the pinpoint. The setting may be made, whereby the light can be concentrated on the dead space 15 having a low luminance. As a result, the luminance unevenness is most advantageously eliminated. Further, as shown in a backlight 17b shown in FIG. 5, LEDs 26, 27,
28 and 29 may be provided, and the cuts 30 may be formed in any of the side surfaces in the longitudinal direction. By the way, if the LED is provided at all the corners of the rectangular light guide plate and the cutouts are provided on all the side surfaces, the backlight 17 provided with two LEDs is provided. As compared with the above, the uneven brightness is further eliminated, and the object of the present invention is most advantageously achieved. Further, in each of the above-described embodiments, the tip of the cut portion is formed at an acute angle, a right angle, or an obtuse angle. Alternatively, as shown in a backlight 17c shown in FIG.
b, a cutout portion 31 formed in an arc shape or a semicircle shape, or a light guide plate 18 like a backlight 17d shown in FIG.
The cut-out portion 32 may have a polygonal shape in c. One or more cut-out portions having this shape are provided on one side surface. It should be noted that the present invention is not limited to the above embodiment, and various changes and improvements may be made without departing from the scope of the present invention. For example, in the backlight 17, the two corners of the light guide plate 18 are LE
D11 and 12 are provided, and the large triangular cut portion 20
Although the triangular small cut portions 21 and 22 are formed, LEDs may be disposed at the four corners instead, and similar cut portions may be formed on any of the side surfaces. In addition, the number of cut portions formed on the side surface is also one, two or four, five,
The number may be six or more. As described above, according to the liquid crystal display device of the present invention, the cutout portion is provided on the side of the light guide plate of the backlight outside the effective light emitting region, so that the light emitted from the point light source can be reduced. The light that reaches the cutout enters the low dead space where the luminance in the effective light emitting region is low, whereby the uniformity of the emitted light is increased over the entire effective light emitting region of the light guide plate, and a uniform luminance is obtained. Light directed toward the outside of the effective light emitting region of the light guide plate is effectively introduced into the effective light emitting region, and as a result, a high-performance liquid crystal display device in which light is evenly incident on the effective display region with high luminance can be provided.
【図面の簡単な説明】
【図１】本発明の液晶表示装置の一部破断平面図であ
る。
【図２】図１のＹ−Ｙ線の断面図である。
【図３】本発明の液晶表示装置に係るバックライトの要
部拡大平面図である。
【図４】本発明の液晶表示装置に係る他のバックライト
の要部拡大平面図である。
【図５】本発明の液晶表示装置に係る他のバックライト
の要部拡大平面図である。
【図６】本発明の液晶表示装置に係る他のバックライト
の要部拡大平面図である。
【図７】本発明の液晶表示装置に係る他のバックライト
の要部拡大平面図である。
【図８】従来の液晶表示装置の一部破断平面図である。
【図９】図８のＸ−Ｘ線の断面図である。
【図１０】従来の液晶表示装置に係るバックライトの平
面図である。
【符号の説明】
１、１６ 液晶表示装置
３ 液晶表示体
２、１７、１７ａ、１７ｂ、１７ｃ、１７ｄバックライ
ト
４ ベゼル
５ 有効表示領域
６ 有効発光領域
７、１８、１８ａ、１８ｂ導光板
８、１９ 反射シート
９ 光拡散シート
１０ レンズシート
１１、１２、２６、２７、２８、２９ＬＥＤ
２０ 三角大切り込み部２０
２１、２２ 三角小切り込み部
２３ 大切り込み部
２４ 中切り込み部
２５ 小切り込み部
３０、３１、３２切り込み部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially broken plan view of a liquid crystal display device of the present invention. FIG. 2 is a cross-sectional view taken along line YY of FIG. FIG. 3 is an enlarged plan view of a main part of a backlight according to the liquid crystal display device of the present invention. FIG. 4 is an enlarged plan view of a main part of another backlight according to the liquid crystal display device of the present invention. FIG. 5 is an enlarged plan view of a main part of another backlight according to the liquid crystal display device of the present invention. FIG. 6 is an enlarged plan view of a main part of another backlight according to the liquid crystal display device of the present invention. FIG. 7 is an enlarged plan view of a main part of another backlight according to the liquid crystal display device of the present invention. FIG. 8 is a partially broken plan view of a conventional liquid crystal display device. FIG. 9 is a sectional view taken along line XX of FIG. 8; FIG. 10 is a plan view of a backlight according to a conventional liquid crystal display device. DESCRIPTION OF SYMBOLS 1, 16 Liquid crystal display 3 Liquid crystal display 2, 17, 17a, 17b, 17c, 17d Backlight 4 Bezel 5 Effective display area 6 Effective light emitting area 7, 18, 18a, 18b Light guide plate 8, 19 Reflection sheet 9 Light diffusion sheet 10 Lens sheet 11, 12, 26, 27, 28, 29 LED 20 Large triangular cut section 20 21, 22 Triangular small cut section 23 Large cut section 24 Medium cut section 25 Small cut section 30, 31, 32 Notch
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13357 F21V 8/00 601 G02B 6/00 301 G09F 9/00 336 G09F 13/18 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G02F 1/13357 F21V 8/00 601 G02B 6/00 301 G09F 9/00 336 G09F 13/18
Claims (1)
た矩形状の導光体の一方主面および側面に光反射部材
を、他方主面に光散乱部材を設けたバックライトの光散
乱部材上に液晶表示体を載設した液晶表示装置であっ
て、前記導光体における２つの角部の間に切り込み部を
導光板の有効発光領域外に設け、該切り込み部の側面に
光反射部材を設け、さらに上記切り込み部は導光板の側
面のほぼ中央部に大きな切り込みを成し、この大きな切
り込みの両側に対称的に小さな切り込みを成したことを
特徴とする液晶表示装置。(57) Claims 1. A light reflecting member is provided on one main surface and a side surface of a rectangular light guide having a point light source disposed on at least two corners, and light is provided on the other main surface. A liquid crystal display device in which a liquid crystal display is mounted on a light scattering member of a backlight provided with a scattering member, wherein a notch is provided between two corners of the light guide.
It is provided outside the effective light emitting area of the light guide plate , and a light reflecting member is provided on the side surface of the cut portion, and the cut portion is located on the side of the light guide plate.
Make a large cut in the approximate center of the surface,
A liquid crystal display device characterized in that small cuts are formed symmetrically on both sides of the cut .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02081599A JP3366589B2 (en) | 1999-01-28 | 1999-01-28 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02081599A JP3366589B2 (en) | 1999-01-28 | 1999-01-28 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000221500A JP2000221500A (en) | 2000-08-11 |
| JP3366589B2 true JP3366589B2 (en) | 2003-01-14 |
Family
ID=12037542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02081599A Expired - Fee Related JP3366589B2 (en) | 1999-01-28 | 1999-01-28 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3366589B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361890A (en) * | 2018-04-11 | 2019-10-22 | 夏普株式会社 | Lighting device and display device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4671562B2 (en) * | 2001-08-31 | 2011-04-20 | 富士通株式会社 | Illumination device and liquid crystal display device |
| JP4442766B2 (en) * | 2005-02-18 | 2010-03-31 | 株式会社エンプラス | Light guide plate, surface light source device and display device |
| US7686494B2 (en) * | 2005-08-04 | 2010-03-30 | Hydis Technologies Co., Ltd. | Backlight assembly of liquid crystal display |
| CN101438097A (en) | 2006-07-11 | 2009-05-20 | 夏普株式会社 | Light unit, backlight, front light, and display |
| US20130021820A1 (en) * | 2010-04-21 | 2013-01-24 | Satoshi Ueda | Backlight device and display device |
| KR102139576B1 (en) * | 2013-08-09 | 2020-07-31 | 삼성디스플레이 주식회사 | Display device |
-
1999
- 1999-01-28 JP JP02081599A patent/JP3366589B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361890A (en) * | 2018-04-11 | 2019-10-22 | 夏普株式会社 | Lighting device and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000221500A (en) | 2000-08-11 |
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