JP3094092B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP3094092B2 JP3094092B2 JP08042972A JP4297296A JP3094092B2 JP 3094092 B2 JP3094092 B2 JP 3094092B2 JP 08042972 A JP08042972 A JP 08042972A JP 4297296 A JP4297296 A JP 4297296A JP 3094092 B2 JP3094092 B2 JP 3094092B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- thickness
- light guide
- crystal display
- circuit board
- 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)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は液晶表示装置の薄
型化に関する。TECHNICAL FIELD The present invention relates to a thin <br/>-type liquid crystal display equipment.
【０００２】[0002]
【従来の技術】従来の液晶表示装置１及び面状光源（バ
ックライトとも言う）４の構造を図３の断面図を参照し
て説明する。前カバー２ａと後カバー２ｂとでケース２
が構成され、前カバー２ａの前面には周辺を除いた内部
に透孔２ａ１が形成される。ケース２の前面側に液晶表
示板３が、液晶表示板３の裏面側にバックライト４が、
バックライト４の裏面側に液晶駆動回路基板５がそれぞ
れ対向してケース２内に収容される。2. Description of the Related Art The structure of a conventional liquid crystal display device 1 and a planar light source (also referred to as a backlight) 4 will be described with reference to a sectional view of FIG. The case 2 includes the front cover 2a and the rear cover 2b.
And a through hole 2a1 is formed inside the front cover 2a except for the periphery. A liquid crystal display panel 3 is provided on the front side of the case 2 and a backlight 4 is provided on the rear side of the liquid crystal display panel 3.
The liquid crystal driving circuit boards 5 are accommodated in the case 2 so as to face the back side of the backlight 4 respectively.
【０００３】液晶表示板３は透明基板３ａ，３ｂが一体
に貼り合わされ、両基板の内面に各種の電極等が形成さ
れ、両基板の間に液晶が封入されている。バックライト
４はランプ（冷陰極管など）４ａ及びその反射板４ｂが
導光部４ｃの端面に取付けられて板状に構成される。導
光部４ｃはアクリル製の比較的厚い導光板４ｇと、その
前面と裏面に薄い拡散シート４ｆと反射シート４ｈとが
それぞれ積層されて一体に構成され、ランプ４ａの光を
照度の均一な面状の光に変換する。The liquid crystal display panel 3 has transparent substrates 3a and 3b bonded together, various electrodes and the like are formed on the inner surfaces of both substrates, and liquid crystal is sealed between the two substrates. The backlight 4 is formed in a plate shape by attaching a lamp (a cold cathode tube or the like) 4a and a reflection plate 4b thereof to an end face of the light guide 4c. The light guide portion 4c is formed by laminating a relatively thick light guide plate 4g made of acrylic resin, a thin diffusion sheet 4f and a reflection sheet 4h on the front and back surfaces thereof, and integrally forms the light from the lamp 4a with a uniform illuminance. Is converted into light.
【０００４】ランプの光は導光板４ｇの端面に入射し、
アクリルと空気の屈折率の違いを利用して、アクリル板
内で反射を繰り返して進行させ、予め導光板４ｇに印刷
された特殊なインクと反射シート４ｈにより反射させ、
導光板４ｇの表面から放射させ、更に拡散シート４ｆで
光を拡散させる。液晶駆動回路基板５には、液晶ドライ
ブ用ＩＣ４ａをポリイミド製のＦＰＣ（可撓性配線板）
４ｂに実装したＴＣＰ（Tape Carrier Package）４ｃ
や、多種電子部品類４ｄが実装される。液晶駆動回路基
板５より導出されたＦＰＣ４ｂはコ字状に折り曲げられ
て透明基板３ｂの周辺の電極に接続される。The light of the lamp is incident on the end face of the light guide plate 4g,
Utilizing the difference in the refractive index between acrylic and air, the light is repeatedly reflected in the acrylic plate and advanced, and is reflected by the special ink and the reflective sheet 4h printed on the light guide plate 4g in advance,
The light is emitted from the surface of the light guide plate 4g and further diffused by the diffusion sheet 4f. On the liquid crystal drive circuit board 5, a liquid crystal drive IC 4a is formed by a polyimide FPC (flexible wiring board).
TCP (Tape Carrier Package) 4c mounted on 4b
Also, various electronic components 4d are mounted. The FPC 4b led out from the liquid crystal drive circuit board 5 is bent in a U-shape and connected to the electrodes around the transparent substrate 3b.
【０００５】液晶表示板３及びバックライト４はそれぞ
れ共通の枠部６の前面及び裏面にそれぞれ取付けられて
いる。[0005] The liquid crystal display panel 3 and the backlight 4 are respectively mounted on the front and back surfaces of a common frame portion 6.
【０００６】[0006]
【発明が解決しようとする課題】液晶表示装置は薄型で
軽量であることからパソコンやワープロ或いは各種装置
の表示部として用途が急速に拡大されている。ところが
最近、ユーザ側よりその更なる薄型化について強い要望
がだされ、その可否がシェアに大きな影響を与えるよう
になってきた。この発明はこのような事情に鑑みてなさ
れたものである。Since a liquid crystal display device is thin and lightweight, its use is rapidly expanding as a display portion of a personal computer, a word processor or various devices. However, recently, there has been a strong demand from users for further reduction in thickness, and whether or not the thinning has had a great influence on the market share. The present invention has been made in view of such circumstances.
【０００７】[0007]
【課題を解決するための手段】請求項１の液晶表示装置
の構造では、導光部が、光の入射端面側が最も厚く、そ
の入射端面より離れるにつれて薄くなるテーパ部と、そ
のテーパ部に隣接して、テーパ部の最小の厚さに等しい
厚さをもつ薄板部とより構成される。それらのテーパ部
と薄板部の各前面は同一面とされ、薄板部の裏面側に液
晶駆動回路基板が配されている。The structure of the liquid crystal display device of 請 Motomeko 1 SUMMARY OF THE INVENTION The light guide portion is incident end face side of the light thickest, and thinning taper portion increasing distance from the incident end face, in that the tapered portion And a thin plate portion having a thickness equal to the minimum thickness of the tapered portion. The front surfaces of the tapered portion and the thin plate portion are made the same, and a liquid crystal drive circuit board is disposed on the back surface side of the thin plate portion.
【０００８】テーパ部の厚さの最大値をＷａ，最小値を
Ｗｂとするとき、液晶駆動回路基板の部品実装高を含む
厚さＷｃが、Ｗｃ≒Ｗａ−Ｗｂに設定される。 [0008] When the maximum value of the thickness of the tape over path portion Wa, the minimum value Wb, thickness Wc containing component mounting height of the liquid crystal drive circuit board is set to Wc ≒ Wa-Wb.
【０００９】液晶表示板及びバックライトが共通の枠部
に取付けられている。 The liquid crystal display panel and the backlight have a common frame portion.
Mounted on
【００１０】[0010]
【発明の実施の形態】図１及び図２に実施例を参照して
発明の実施の形態を説明する。しかし、これらの図では
図３と対応する部分に同じ符号を付し、重複説明を省略
する。この発明では、装置の薄型化を図るために、導光
部４ｃを光の入射端面側が従来と同様に厚いが（その厚
さをＷａとする）、しかし入射端面より離れるにつれて
薄くなるテーパ部４ｃ１と、そのテーパ部に隣接して、
テーパ部の最小の厚さＷｂに等しい厚さをもつ薄板部４
ｃ２とで構成する。テーパ部４ｃ１と薄板部４ｃ２の各
前面（液晶表示板３と対向する面）は面一とされる。つ
まり同一平面上にある。そして、薄板部４ｃ２の裏面側
に液晶駆動回路基板５が配される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. However, in these figures, parts corresponding to those in FIG. 3 are denoted by the same reference numerals, and redundant description is omitted. In the present invention, in order to reduce the thickness of the device, the light guide portion 4c is thicker on the light incident end face side as in the prior art (the thickness is defined as Wa), but the tapered portion 4c1 becomes thinner as the distance from the light incident end face increases. And, adjacent to the tapered part,
Thin plate portion 4 having a thickness equal to the minimum thickness Wb of the tapered portion
c2. The front surfaces (the surface facing the liquid crystal display panel 3) of the tapered portion 4c1 and the thin plate portion 4c2 are flush with each other. That is, they are on the same plane. The liquid crystal drive circuit board 5 is disposed on the back side of the thin plate portion 4c2.
【００１１】導光部４ｃでは、薄い前面の拡散シート４
ｆ及び裏面の反射シート４ｈの厚さは一定であるが、厚
さの大部分を占める導光板４ｇの厚さが変化する。導光
部４ｃでは、光源からの距離及び導光板の厚さの変化に
対応して変化する光の減衰率に応じて、導光板４ｇに印
刷するインクの印刷密度を変化させることにより、面状
光源として従来と同等の照度の均一性を得ている。The light guide 4c has a thin front diffusion sheet 4
Although the thickness of f and the reflection sheet 4h on the back surface are constant, the thickness of the light guide plate 4g that occupies most of the thickness changes. The light guide section 4c changes the printing density of the ink printed on the light guide plate 4g according to the distance from the light source and the attenuation rate of the light that changes in accordance with the change in the thickness of the light guide plate. Illuminance uniformity equivalent to that of the conventional light source is obtained.
【００１２】なお、液晶駆動回路基板５の部品実装高を
含む厚さＷｃは図１から分かるように、テーパ部４ｃ１
の厚さの最大値Ｗａと最小値Ｗｂ（薄板部４ｃ２の厚さ
に等しい）との差にほぼ等しいようにそれぞれの厚さが
設定される。液晶表示板３及びバックライト４は従来と
同様に共通の枠部６の前面及び裏面にそれぞれ取付けら
れ、装置１は全体として薄型でコンパクトにまとめられ
ている。As can be seen from FIG. 1, the thickness Wc of the liquid crystal drive circuit board 5 including the component mounting height is the tapered portion 4c1.
Are set substantially equal to the difference between the maximum value Wa and the minimum value Wb (equal to the thickness of the thin plate portion 4c2). The liquid crystal display panel 3 and the backlight 4 are respectively mounted on the front and back surfaces of the common frame 6 as in the prior art, and the device 1 is thin and compact as a whole.
【００１３】[0013]
【発明の効果】以上述べたように、この発明ではバック
ライトの導光部４ｃをランプ側より離れるにつれて厚さ
がＷａからＷｂに薄くなるテーパ部４ｃ１と、そのテー
パ部の最小の厚さＷｂに等しい厚さをもつ薄板部４ｃ２
とで構成し、その薄板部４ｃ２の裏面側に液晶駆動回路
基板５を配したので、薄板部４ｃ２が従来より薄くなっ
た寸法Ｗａ−Ｗｂだけ液晶表示装置１の厚さを薄くする
ことができる。As described above, according to the present invention, thickness of the ruthenate over path portion 4c1 of thin Wb from Wa as the light guide portion 4c of the backlight away from the lamp side in the present invention, the minimum of the tapered portion Thin plate portion 4c2 having a thickness equal to thickness Wb
Since the liquid crystal drive circuit board 5 is disposed on the back side of the thin plate portion 4c2, the thickness of the liquid crystal display device 1 can be reduced by the dimension Wa-Wb in which the thin plate portion 4c2 is thinner than before. .
【図１】この発明の実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】図１の導光部４ｃの断面図。FIG. 2 is a sectional view of a light guide section 4c of FIG.
【図３】従来の液晶表示装置の断面図。FIG. 3 is a cross-sectional view of a conventional liquid crystal display device.
Claims (1)
体と、 上記枠体の前面にその裏面が取付けられた液晶表示体
と、 上記枠体の裏面にその前面が取付けられ、板状の導光部
とその導光部の端面に光を入射するランプとを有するバ
ックライトと、 上記導光部の裏面側に配された液晶駆動回路基板と、 上記液晶駆動回路基板に取付けられた電子部品類とから
成り、 上記導光部は光の入射面側が最も厚く、その入射面側よ
り離れるにつれて薄くなるテーパ部と、そのテーパ部に
隣接して、テーパ部の最小の厚さに等しい厚さを持つ薄
板部とより成り、 上記液晶駆動回路基板は上記薄板部の裏面側に配され、 上記テーパ部の最大の厚さＷａ、最小の厚さＷｂ、上記
液晶駆動回路基板の部品実装高さを含む厚さの和Ｗｃと
は、Ｗｃ≒Ｗａ−Ｗｂに設定 されていることを特徴とす
る液晶表示装置。 1. A frame-like frame attached to a front surface of a rear cover.
Body and a liquid crystal display body having a back surface attached to the front surface of the frame body
And the front surface is attached to the back surface of the frame, and a plate-shaped light guide
And a lamp having light incident on an end face of the light guide.
Backlight, a liquid crystal drive circuit board disposed on the back side of the light guide section , and electronic components mounted on the liquid crystal drive circuit board.
The light guide section is thickest on the light incident surface side, and is closer to the light incident surface side.
Taper portion that becomes thinner as
Adjacent, thin with a thickness equal to the minimum thickness of the taper
Become more a plate portion, the liquid crystal drive circuit board is disposed on the back side of the thin plate portion, the maximum thickness Wa of the tapered portion, the minimum thickness Wb, the
The sum of the thickness Wc including the component mounting height of the liquid crystal drive circuit board, and
The liquid crystal display equipment, characterized in that it is set to Wc ≒ Wa-Wb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08042972A JP3094092B2 (en) | 1996-02-29 | 1996-02-29 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08042972A JP3094092B2 (en) | 1996-02-29 | 1996-02-29 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09236800A JPH09236800A (en) | 1997-09-09 |
| JP3094092B2 true JP3094092B2 (en) | 2000-10-03 |
Family
ID=12650963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08042972A Expired - Fee Related JP3094092B2 (en) | 1996-02-29 | 1996-02-29 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3094092B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500886B1 (en) | 1999-11-10 | 2002-12-31 | Nihon Hyomen Kagaku Kabushiki Kaisha | Surface treating agent |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000045981A (en) * | 1998-12-31 | 2000-07-25 | 윤종용 | Back light assembly |
| JP5754196B2 (en) * | 2011-03-23 | 2015-07-29 | ソニー株式会社 | Illumination device and display device |
-
1996
- 1996-02-29 JP JP08042972A patent/JP3094092B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500886B1 (en) | 1999-11-10 | 2002-12-31 | Nihon Hyomen Kagaku Kabushiki Kaisha | Surface treating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09236800A (en) | 1997-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000606 |
|
| LAPS | Cancellation because of no payment of annual fees |