JP3187785B2 - Reflective liquid crystal display - Google Patents
Reflective liquid crystal displayInfo
- Publication number
- JP3187785B2 JP3187785B2 JP04393099A JP4393099A JP3187785B2 JP 3187785 B2 JP3187785 B2 JP 3187785B2 JP 04393099 A JP04393099 A JP 04393099A JP 4393099 A JP4393099 A JP 4393099A JP 3187785 B2 JP3187785 B2 JP 3187785B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- light
- display device
- substrates
- 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 - Lifetime
Links
Landscapes
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は反射型アクティブマ
トリックス液晶表示装置の遮光層の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a light shielding layer of a reflection type active matrix liquid crystal display device.
【０００２】[0002]
【従来の技術】従来の遮光層は、透過型アクティブマト
リックス液晶表示装置の場合ではアクティブ素子全体を
も覆う必要があり、反射型単純マトリックス液晶表示装
置ではアクティブ素子を内蔵していないために信号線と
走査線のみを覆えばよかった。2. Description of the Related Art In the case of a transmission type active matrix liquid crystal display device, a conventional light-shielding layer needs to cover the entire active element. And only scan lines should have been covered.
【０００３】また反射型アクティブマトリックス型液晶
表示装置では１９８９年電子情報通信学会秋季全国大会
講演論文集分冊５、３０項に記載されているものがあ
る。これは第５図に示すように遮光層で信号線と走査線
の部分を覆っている。[0003] A reflection type active matrix type liquid crystal display device is described in Vol. 5, No. 30, Proceedings of the 1989 Autumn Meeting of the Institute of Electronics, Information and Communication Engineers. This covers the signal lines and the scanning lines with a light shielding layer as shown in FIG.
【０００４】[0004]
【発明が解決しようとする課題】液晶表示装置におい
て、信号線、走査線、及びアクティブ素子等の液晶駆動
電極が設置できない部分は液晶を駆動するてとができな
いためその周囲ではコントラストが低下する。このため
遮光層を設けて液晶を駆動できない部分は見えないよう
にし、コントラストを上げている。In a liquid crystal display device, a portion where a liquid crystal drive electrode such as a signal line, a scanning line, and an active element cannot be provided cannot drive the liquid crystal, so that the contrast is reduced around the portion. For this reason, a light-shielding layer is provided so that a portion where the liquid crystal cannot be driven is made invisible to increase contrast.
【０００５】しかし反射型アクティブマトリックス液晶
表示装置において、通常の方法では液晶駆動電極のスル
ーホールは凹型となり平坦にならないので、乱反射によ
りコントラストが低下する。スルーホール部を埋める方
法は複雑なため、簡単にコントラストを向上させること
ができないという課題を有する。However, in a reflection type active matrix liquid crystal display device, the through-hole of the liquid crystal drive electrode is concave and not flat in a usual method, so that the contrast is reduced due to irregular reflection. Since the method of filling the through hole is complicated, there is a problem that the contrast cannot be easily improved.
【０００６】本発明はこの課題を解決するもので、その
目的とするところは、簡単にコントラストが向上する構
造の提供にある。The present invention solves this problem, and an object of the present invention is to provide a structure in which the contrast is easily improved.
【０００７】[0007]
【課題を解決するための手段】本発明の反射型液晶表示
装置は、一対の基板間に液晶層が封入されてなり、前記
一対の基板の一方の基板にはマトリックス状に形成され
た複数の駆動電極と前記駆動電極に接続された複数のス
イッチング素子が配置されてなる反射型液晶表示装置に
おいて、前記スイッチング素子と前記駆動電極とは前記
スイッチング素子上の絶縁膜に形成されたスルーホール
を介して接続されてなり、前記一対の基板の他方の基板
上には前記スルーホールにより生じた前記駆動電極の凹
部に対向する位置に遮光膜が形成されてなり、前記遮光
膜の上には共通電極が形成されてなることを特徴とす
る。本発明の反射型液晶表示装置は、前記遮光膜は前記
スイッチング素子に接続される配線に対向配置されてな
ることを特徴とする。The reflection type liquid crystal display device of the present invention comprises a liquid crystal layer sealed between a pair of substrates, and one of the pair of substrates has a plurality of substrates formed in a matrix. In a reflective liquid crystal display device including a driving electrode and a plurality of switching elements connected to the driving electrode, the switching element and the driving electrode are connected via a through hole formed in an insulating film on the switching element. A light-shielding film is formed on the other substrate of the pair of substrates at a position facing a recess of the drive electrode caused by the through-hole, and a common electrode is formed on the light-shielding film. Is formed. The reflection type liquid crystal display device according to the present invention is characterized in that the light-shielding film is disposed to face a wiring connected to the switching element.
【０００８】[0008]
【発明の実施の形態】図１は本発明の液晶表示装置の断
面図である。図１の下から順に駆動電極側ガラス基板１
０１、アクティブ素子を構成する１０２〜１０９、信号
線１１１ａまたは走査線１１１ｂ、液晶駆動電極１１
０、液晶１１２、共通電極１１３、遮光層１１４、共通
電極側ガラス基板１１５、である。FIG. 1 is a sectional view of a liquid crystal display device according to the present invention. Drive electrode side glass substrate 1 in order from the bottom of FIG.
01, 102 to 109 constituting an active element, signal line 111a or scanning line 111b, liquid crystal drive electrode 11
0, a liquid crystal 112, a common electrode 113, a light shielding layer 114, and a common electrode side glass substrate 115.
【０００９】これを共通基板側からみたのが図２、及び
図３である．遮光層１１４は信号線１１１ａと走査線１
１１ｂを覆うと同時に液晶駆動電極１１０の一部を覆っ
ている。本発明の構成要素である光反射面を兼ねた液晶
駆動電極には、アクティブ素子との接点であるスルーホ
ール部に生じた凹部が存在する。この凹部によって入射
光は乱反射され、その結果コントラストが低下する。こ
の凹部を遮光層で覆うと常に黒く表示されるものの、重
要部のみ表示することでコントラストの低下を防止でき
る。FIG. 2 and FIG. 3 show this when viewed from the common substrate side. The light shielding layer 114 includes the signal line 111a and the scanning line 1
11b and a part of the liquid crystal drive electrode 110 at the same time. The liquid crystal drive electrode which also serves as a light reflecting surface, which is a component of the present invention, has a concave portion formed in a through hole portion which is a contact point with an active element. The incident light is irregularly reflected by the concave portion, and as a result, the contrast is reduced. When the concave portion is covered with the light-shielding layer, it is always displayed in black, but by displaying only the important portion, a decrease in contrast can be prevented.
【００１０】この遮光層は図１のように単独の層として
もよいし、カラーフィルターを設けている場合は図４の
ようにそれと一体化させてもよい。また、遮光層を共通
電極の液晶側に形成することも可能である。さらに図で
は液晶駆動電極の凹部を覆う遮光部は独立した領域とは
なっていないがこれを走査線や信号線の遮光部と独立さ
せることも可能である。The light-shielding layer may be a single layer as shown in FIG. 1 or, if a color filter is provided, it may be integrated with the layer as shown in FIG. Further, the light-shielding layer can be formed on the liquid crystal side of the common electrode. Further, in the figure, the light-shielding portion covering the concave portion of the liquid crystal drive electrode is not an independent region, but it can be made independent of the light-shielding portion of the scanning line or the signal line.
【００１１】図１、図２、図３、図４、図５ともにアク
ティブ素子としてＦＥＴを図示しているがこれをＣＭＯ
ＳＦＥＴにしたり、冗長性を持たすためゲート電極を二
つ持ったデュアルゲート型にする、あるいは逆スタガー
型構造の素子にするなど、素子構造を変えたときでも光
反射面を兼ねた液晶駆動電極が素子形成過程で発生した
凹部を持つならば本発明の遮光部は有効である。In FIGS. 1, 2, 3, 4, and 5, an FET is shown as an active element.
Even when the element structure is changed, such as an SFET, a dual gate type with two gate electrodes for redundancy, or an inverted stagger type element, the liquid crystal drive electrode that also serves as a light reflection surface is The light-shielding portion of the present invention is effective if it has a concave portion generated during the element formation process.
【００１２】また、液晶駆動素子の材料として多結晶シ
リコンを挙げたが、これはアモルファスシリコンや単結
晶シリコン、あるいは他の物質でもよい。Although polycrystalline silicon has been described as a material of the liquid crystal driving element, it may be amorphous silicon, single crystal silicon, or another substance.
【００１３】[0013]
【発明の効果】以上説明した本発明の液晶表示装置は、
反射型アクティブマトリックス液晶表示装置において、
２枚の対向する基板のうち、一方の基板の液晶駆動電極
のスルーホール部に対向して、他方の基板に遮光膜を設
けているため、スルーホール部における乱反射を他方の
基板の遮光膜で覆うことが可能となり、コントラストを
向上させることができる。The liquid crystal display device of the present invention described above has the following advantages.
In a reflection type active matrix liquid crystal display device,
Of the two opposing substrates, a light-shielding film is provided on the other substrate facing the through-hole portion of the liquid crystal drive electrode of one of the substrates, so that diffuse reflection at the through-hole portion is prevented by the light-shielding film of the other substrate. It becomes possible to cover, and the contrast can be improved.
【図１】本発明の液晶表示装置の断面図。FIG. 1 is a cross-sectional view of a liquid crystal display device of the present invention.
【図２】本発明の液晶表示装置を共通電極側からみた平
面図。FIG. 2 is a plan view of the liquid crystal display device of the present invention as viewed from a common electrode side.
【図３】本発明の液晶表示装置を共通電極側から１画素
分だけ拡大した平面図。FIG. 3 is a plan view in which the liquid crystal display device of the present invention is enlarged by one pixel from the common electrode side.
【図４】カラーフィルターと遮光層とを一体化させた本
発明の液晶表示装置の図。FIG. 4 is a diagram of a liquid crystal display device of the present invention in which a color filter and a light shielding layer are integrated.
【図５】従来の反射型アクティブマトリックス液晶表示
装置の断面図。FIG. 5 is a sectional view of a conventional reflective active matrix liquid crystal display device.
１０１ …駆動電極側ガラス基板 １０２ …ソース １０３ …多結晶シリコン １０４ …ドレイン １０５ …層間絶縁膜 １０６ …ゲート絶縁膜 １０７ …ゲート １０８ …ソース電極 １０９ …ドレイン電極 １１０ …液晶駆動電極 １１１ａ…信号線 １１１ｂ…走査線 １１２ …液晶 １１３ …共通電極 １１４ …遮光層 １１５ …共通電極側ガラス基板 DESCRIPTION OF SYMBOLS 101 ... Driving electrode side glass substrate 102 ... Source 103 ... Polycrystalline silicon 104 ... Drain 105 ... Interlayer insulating film 106 ... Gate insulating film 107 ... Gate 108 ... Source electrode 109 ... Drain electrode 110 ... Liquid crystal driving electrode 111a ... Signal line 111b ... Scanning line 112 ... Liquid crystal 113 ... Common electrode 114 ... Light shielding layer 115 ... Common electrode side glass substrate
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭64−63729（ＪＰ，Ａ) 特開 昭64−63728（ＪＰ，Ａ) 特開 平１−156724（ＪＰ，Ａ) 実開 平１−104051（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-63729 (JP, A) JP-A-64-63728 (JP, A) JP-A-1-156724 (JP, A) 104051 (JP, U)
Claims (2)
り、前記一対の基板の一方の基板にはマトリックス状に
形成された複数の駆動電極と前記駆動電極に接続された
複数のスイッチング素子が配置されてなる反射型液晶表
示装置において、 前記スイッチング素子と前記駆動電極とは前記スイッチ
ング素子上の絶縁膜に形成されたスルーホールを介して
接続されてなり、前記一対の基板の他方の基板上には前
記スルーホールにより生じた前記駆動電極の凹部に対向
する位置に遮光膜が形成されてなり、前記遮光膜の上に
は共通電極が形成されてなることを特徴とする反射型液
晶表示装置。A liquid crystal layer is sealed between a pair of substrates, and one of the pair of substrates has a plurality of drive electrodes formed in a matrix and a plurality of switching elements connected to the drive electrodes. Wherein the switching element and the drive electrode are connected via a through hole formed in an insulating film on the switching element, and the other of the pair of substrates A reflection type liquid crystal display, wherein a light shielding film is formed on a position facing a concave portion of the drive electrode generated by the through hole, and a common electrode is formed on the light shielding film. apparatus.
接続される配線に対向配置されてなることを特徴とする
請求項１に記載の反射型液晶表示装置。2. The reflection type liquid crystal display device according to claim 1, wherein the light shielding film is arranged to face a wiring connected to the switching element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04393099A JP3187785B2 (en) | 1999-02-22 | 1999-02-22 | Reflective liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04393099A JP3187785B2 (en) | 1999-02-22 | 1999-02-22 | Reflective liquid crystal display |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29051589A Division JP3078554B2 (en) | 1989-11-08 | 1989-11-08 | Reflective liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11316390A JPH11316390A (en) | 1999-11-16 |
| JP3187785B2 true JP3187785B2 (en) | 2001-07-11 |
Family
ID=12677419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04393099A Expired - Lifetime JP3187785B2 (en) | 1999-02-22 | 1999-02-22 | Reflective liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3187785B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5258277B2 (en) * | 2006-12-26 | 2013-08-07 | 株式会社半導体エネルギー研究所 | Liquid crystal display |
| JP5019617B2 (en) | 2008-03-11 | 2012-09-05 | 株式会社ジャパンディスプレイセントラル | Liquid crystal display |
| JP4889711B2 (en) * | 2008-11-25 | 2012-03-07 | 株式会社 日立ディスプレイズ | Liquid crystal display |
-
1999
- 1999-02-22 JP JP04393099A patent/JP3187785B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11316390A (en) | 1999-11-16 |
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