JPS6392923A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS6392923A
JPS6392923A JP61237829A JP23782986A JPS6392923A JP S6392923 A JPS6392923 A JP S6392923A JP 61237829 A JP61237829 A JP 61237829A JP 23782986 A JP23782986 A JP 23782986A JP S6392923 A JPS6392923 A JP S6392923A
Authority
JP
Japan
Prior art keywords
electrode
potential
common electrode
voltage
liquid crystal
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.)
Granted
Application number
JP61237829A
Other languages
Japanese (ja)
Other versions
JPH0677119B2 (en
Inventor
Takao Kon
昆 隆夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP61237829A priority Critical patent/JPH0677119B2/en
Publication of JPS6392923A publication Critical patent/JPS6392923A/en
Publication of JPH0677119B2 publication Critical patent/JPH0677119B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE:To obtain a good image by impressing a voltage to a transparent common electrode via a voltage impressing electrode. CONSTITUTION:The voltage of the transparent common electrode 37 is kept maintained at a specified potential at all times and the potential of transparent picture element electrodes 31 is set at the potential which is either of the display potential or non-display potential. A liquid crystal layer 43 is oriented in the direction where light is passed in the part of the electrodes 31 when said electrodes are set at the display potential. The light of a prescribed component is thereby radiated through corresponding color filters 35 to the other main plane side of the 2nd substrate 41 and the image is displayed. The potential of the electrodes 31 is set by a holding circuit 47 via a gate line Xi and TFT32.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) この発明はカラーフィルターを用いた液晶表示装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to a liquid crystal display device using a color filter.

(従来の技術) 近年、テレビジョン受像機やグラフィックディスプレイ
装置においては、液晶による画像表示が試みられている
。これに伴ない、大容量で高密度のアクティブマトリッ
クス型の液晶表示装置が開発されている。
(Prior Art) In recent years, attempts have been made to display images using liquid crystals in television receivers and graphic display devices. In line with this trend, large-capacity, high-density active matrix liquid crystal display devices have been developed.

このようなアクティブマトリックス型の液晶表示装置の
一例としては、特開昭60−260020号公報に記載
されている第2図に示すような構造のものがある。同図
において、ガラス基板(10)上にはゲートi’dir
IM(11)、ゲート絶縁膜(12)、半導体層(13
)、ソース電極(14)及びドレイン電極(15)から
構成される4護トランジスタ(以下、TPTと称す)と
一端がソース電極(14)に接続されている表示電極(
16)が形成され、更にこれらを覆うように保ff1l
u(17)が形成されている。一方、ガラス基板(18
)上には、共通型w (10)と所定のパターンを有す
る光遮蔽[(20)が順次形成されている。そしてガラ
ス基板(10)、 (18)間には液晶層(21)が挟
持されている。なお図には示されていないが、ガラス基
板(18)と共通ff1pI4(19)の間には絶縁膜
を介してカラ−フィルターが存在することがある。この
場合、光速ti膜(20)はカラーフィルターのブラッ
クマトリックスとしての役割も果たすことになる。
An example of such an active matrix type liquid crystal display device is one having a structure as shown in FIG. 2 described in Japanese Patent Application Laid-Open No. 60-260020. In the figure, there is a gate i'dir on the glass substrate (10).
IM (11), gate insulating film (12), semiconductor layer (13)
), a four-protection transistor (hereinafter referred to as TPT) consisting of a source electrode (14) and a drain electrode (15), and a display electrode (14) whose one end is connected to the source electrode (14).
16) is formed, and further cover it with ff1l.
u(17) is formed. On the other hand, a glass substrate (18
), a common type w (10) and a light shield [(20) having a predetermined pattern are sequentially formed. A liquid crystal layer (21) is sandwiched between the glass substrates (10) and (18). Although not shown in the figure, a color filter may exist between the glass substrate (18) and the common ff1pI4 (19) with an insulating film interposed therebetween. In this case, the light-speed Ti film (20) will also serve as a black matrix of the color filter.

第3図はガラス基板(18)を共通電極(19)側から
みたときの平面図である。同図かられかるように、光遮
蔽膜(20)はガラス基板(18)上で格子状に形成さ
れており、ガラス基板(18)の一対角線上の両端位置
に、共通電極(19)に電圧を印加するためのパッド(
22)が存在している。
FIG. 3 is a plan view of the glass substrate (18) viewed from the common electrode (19) side. As can be seen from the figure, the light shielding film (20) is formed in a grid pattern on the glass substrate (18), and the common electrodes (19) are placed at both ends of one diagonal of the glass substrate (18). Pad for applying voltage (
22) exists.

(発明が解決しようとする問題点) しかし、このようにパッド(22)を部分的に配置する
構成では、共通電極(19)に均一な電圧を印加するこ
とは難しく、所望の表示が充分に行えないことがあった
。また、例えば有機導電材料で共通電極(19)がガラ
ス基板(1o)側にトランスファする場合に、パッド(
22)との接続は電気的に不安定であり、信頼性に難点
があった。
(Problems to be Solved by the Invention) However, in this configuration in which the pads (22) are partially arranged, it is difficult to apply a uniform voltage to the common electrode (19), and the desired display is not sufficiently achieved. There were things I couldn't do. For example, when the common electrode (19) is transferred to the glass substrate (1o) using an organic conductive material, the pad (
The connection with 22) was electrically unstable and had problems with reliability.

この発明は透明共通電極に均一で安定した電圧が印加で
きる液晶表示装置を提供することを目的とする。
An object of the present invention is to provide a liquid crystal display device in which a uniform and stable voltage can be applied to a transparent common electrode.

〔発明の構成〕[Structure of the invention]

(問題点を解決するための手段) この発明は、従来は通常、カラーフィルターに接触して
いたブラックマトリックスを透明共通電極に接触するよ
うに設け、このブラックマトリックスを介して透明共通
電極に電圧を印加するようにしたものである。
(Means for Solving the Problems) In this invention, a black matrix, which was conventionally in contact with a color filter, is provided in contact with a transparent common electrode, and a voltage is applied to the transparent common electrode through this black matrix. It is designed so that the voltage is applied.

(作  用) ブラックマトリックスでもある電圧印加用電極は、透明
共通電極例えばITO(Indlum Tin 0x4
de)より抵抗の低い金属材料からなり、しかもマトリ
ックス状に形成されているため、従来に比べ透明共′i
!i1電極に均一な電圧を印加することができる。
(Function) The voltage application electrode which is also a black matrix is a transparent common electrode such as ITO (Indlum Tin 0x4
e) It is made of a metal material with lower resistance and is formed in a matrix shape, making it more transparent than before.
! A uniform voltage can be applied to the i1 electrode.

(実 施 例) 以下、この発明の詳細を図面を参照して説明する。(Example) The details of this invention will be explained below with reference to the drawings.

第1図(a)はこの発明の一実施例の構成を示す断面図
である0図においてガラス基板(30)の−主面上には
、複数の透明@素電極(31)やこれに電圧を供給する
ための複数のT P T (32)がマトリックス状に
配設され、更にこれには保護fi (33)で覆われて
いる。またガラス基板(34)の−主面上には、透明共
通電極(31)やT P T (32)の位置に合わせ
てマトリックス状に複数のカラーフィルター(35)が
配設されるとともに、このカラーフィルター(35)を
覆うように、保護膜(36)を介して透明共通電極(3
7)及び所定のパターンを有する電圧印加用電極(38
)が形成され、更にこれらは保護[(39)で覆われて
いる。そして透明共通電極(31)等が形成された第1
の基板(40)と透明共通電極(37)等が形成された
第2の基板(41)とは、周囲のシール材(42)によ
り対向配置され、その間隙には液晶層(43)が挟持さ
れている。またガラス基板(30)、 (34)の他主
面上には、それぞれ偏光板(44)、 (45)が被着
されており、偏光板(45)の方から光が照射されるよ
うになっている。
FIG. 1(a) is a cross-sectional view showing the configuration of an embodiment of the present invention. In FIG. A plurality of T P T (32) for supplying the same are arranged in a matrix and are further covered with a protective fi (33). Further, on the -main surface of the glass substrate (34), a plurality of color filters (35) are arranged in a matrix pattern according to the positions of the transparent common electrode (31) and TPT (32), and this A transparent common electrode (3) is placed through a protective film (36) so as to cover the color filter (35).
7) and a voltage applying electrode (38) having a predetermined pattern.
) are formed, and these are further covered with a protection [(39). And a first electrode on which a transparent common electrode (31) etc. are formed.
The substrate (40) and the second substrate (41) on which the transparent common electrode (37) etc. are formed are placed opposite each other with a surrounding sealing material (42), and a liquid crystal layer (43) is sandwiched between them. has been done. Polarizing plates (44) and (45) are attached to the other main surfaces of the glass substrates (30) and (34), respectively, so that light is irradiated from the polarizing plate (45). It has become.

第1図(b)はこの実施例の等価回路を示している0図
において、マトリックス状に配設された透明共通電極(
31)は、それぞれ対応するT P T (32)のソ
ース!!極に接続されている。また各TPT(32)の
ゲート電極は対応するゲート線Yj(j= 1 t2.
3.・・・)、ドレイン電極は対応するデータ線Xi 
(i=1.2,3.・・・)に接続されている。そして
走査線に対応するゲート線Yjは走査回路(46)に接
続され、データ線x1は一水平ライン単位で表示データ
を発生するホールド回路(47)に接続されている。
FIG. 1(b) shows the equivalent circuit of this example. In FIG. 1(b), transparent common electrodes (
31) are the sources of the corresponding T P T (32)! ! connected to the pole. Further, the gate electrode of each TPT (32) is connected to the corresponding gate line Yj (j=1 t2.
3. ), the drain electrode is connected to the corresponding data line Xi
(i=1.2, 3...). The gate line Yj corresponding to the scanning line is connected to a scanning circuit (46), and the data line x1 is connected to a hold circuit (47) that generates display data in units of one horizontal line.

この構成においては、透明共通電極(37)の電位は常
時一定電位に保たれ、透明共通電極(31)の電位は表
示電位と非表示電位のどちらか一方の電位に設定される
。透明共通電極(31)が表示電位に設定されると、そ
の部分で液晶# (43)が光を通す方向に配向される
。これにより、対応するカラーフィルター(35)を通
った所定成分の光が第2の基板(41)の他主面側に放
射され、画像が表示されることになる。なお透明共通電
極(31)の電位は、ゲート線Xi及びT I? T 
(32)を介してホールド回路(47)によって設定さ
れる。
In this configuration, the potential of the transparent common electrode (37) is always kept at a constant potential, and the potential of the transparent common electrode (31) is set to either a display potential or a non-display potential. When the transparent common electrode (31) is set to a display potential, the liquid crystal # (43) is oriented at that portion in a direction that allows light to pass through. Thereby, light of a predetermined component that has passed through the corresponding color filter (35) is radiated to the other main surface side of the second substrate (41), and an image is displayed. Note that the potential of the transparent common electrode (31) is the same as that of the gate line Xi and T I? T
(32) is set by the hold circuit (47).

第1図(c)は第2の基板(41)を透明共通電極(3
7)側からみたときの概略平面図である。図において、
電圧印加用電極(38)は例えばAl、 Crといった
金属からなり、透明共通電極(37)に接触するように
設けられている。そしてその位置は、従来、カラーフィ
ルターに設けられていたブラックマトリックスの位置に
対応している。また電圧印加用電極(38)は透明共通
電極(37)の外周に沿って且つその全周にわたって形
成されており、第1図(a)に示した有機導電材料(4
8)とバッド(49)を介して、図示しない直流電源に
接続されている。
FIG. 1(c) shows the second substrate (41) connected to the transparent common electrode (3).
7) A schematic plan view when viewed from the side. In the figure,
The voltage applying electrode (38) is made of metal such as Al or Cr, and is provided so as to be in contact with the transparent common electrode (37). The position corresponds to the position of a black matrix conventionally provided in a color filter. Further, the voltage application electrode (38) is formed along the outer periphery of the transparent common electrode (37) and over its entire circumference, and is formed using the organic conductive material (4) shown in FIG. 1(a).
8) and a pad (49), it is connected to a DC power supply (not shown).

この実施例では、直流ilt源に接続された電圧印加用
電極(38)によって、透明共通電極(37)に直流電
圧が印加されるが、電圧印加用電極(38)は透明共通
%! 極(37)上でマトリックス状に形成されている
ので、透明共通電極(37)の全体にわたって均一な電
圧を印加することができる。また有機導電材料(48)
は、電圧印加用電極(38)との接触が透明共通電極(
37)の場合と異なって電気的に安定であり、直流電源
と透明共通電極(37)との間で良好な接続状態を確保
することができる。更に、従来の光遮蔽のためのブラッ
クマトリックスに相当する電圧印加用電極(38)が、
よりT P T (32)に近い位置にあるため、斜め
方向から入射する光に対する遮蔽効果も向上する。
In this embodiment, a voltage applying electrode (38) connected to a DC illt source applies a DC voltage to the transparent common electrode (37), and the voltage applying electrode (38) is connected to the transparent common %! Since they are formed in a matrix on the poles (37), a uniform voltage can be applied over the entire transparent common electrode (37). Also organic conductive materials (48)
, the contact with the voltage application electrode (38) is a transparent common electrode (
Unlike the case of 37), it is electrically stable and can ensure a good connection between the DC power source and the transparent common electrode (37). Further, a voltage applying electrode (38) corresponding to a conventional black matrix for light shielding is provided.
Since it is located closer to T P T (32), the shielding effect against light incident from an oblique direction is also improved.

〔発明の効果〕〔Effect of the invention〕

この発明は、透明共通電極に電圧印加用電極を通じて電
圧を印加するため、透明共通電極に均一で安定した電圧
が印加でき、良好な画像が得られる。
In this invention, since a voltage is applied to the transparent common electrode through the voltage applying electrode, a uniform and stable voltage can be applied to the transparent common electrode, and a good image can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図(a)はこの発明の一実施例を示す断面図、第1
図(b)はこの実施例の等価回路を示す図、第1図(c
)はこの実施例の電圧印加用電極を示す概略平面図、第
2図は従来の液晶表示装置の一例を示す断面図、第3図
は第2図の従来例の要部を示す概略平面図である。 (31)・・・透明画素電Vi(35)・・・カラーフ
ィルター(37)・・・透明共通電極 (38)・・・
電圧印加用電極(40)・・・第1の基板  (41)
・・・第2の基板(43)・・・液晶層 (a) (b) 第1図 第1図
FIG. 1(a) is a sectional view showing one embodiment of the present invention.
Figure (b) is a diagram showing the equivalent circuit of this embodiment, and Figure 1 (c) is a diagram showing the equivalent circuit of this embodiment.
) is a schematic plan view showing the voltage applying electrode of this embodiment, FIG. 2 is a cross-sectional view showing an example of a conventional liquid crystal display device, and FIG. 3 is a schematic plan view showing main parts of the conventional example shown in FIG. It is. (31)...Transparent pixel electrode Vi (35)...Color filter (37)...Transparent common electrode (38)...
Voltage application electrode (40)...first substrate (41)
...Second substrate (43)...Liquid crystal layer (a) (b) Fig. 1 Fig. 1

Claims (1)

【特許請求の範囲】[Claims] 複数の透明画素電極がマトリックス状に形成された第1
の基板と、前記透明画素電極に対応する位置にあるカラ
ーフィルター及び前記複数の透明画素電極の共通の対向
電極である透明共通電極が形成された第2の基板と、前
記第1及び第2基板間に挟持された液晶層と、前記カラ
ーフィルターを囲み且つ前記透明共通電極に接触するよ
うに設けられた電圧印加用電極とを備え、前記電圧印加
用電極を介して前記透明共通電極に電圧を印加するよう
にした液晶表示装置。
A first electrode in which a plurality of transparent pixel electrodes are formed in a matrix shape.
a second substrate on which a color filter located at a position corresponding to the transparent pixel electrode and a transparent common electrode that is a common opposing electrode of the plurality of transparent pixel electrodes are formed; and the first and second substrates. A liquid crystal layer sandwiched between the liquid crystal layer and a voltage application electrode provided to surround the color filter and contact the transparent common electrode, and to apply a voltage to the transparent common electrode via the voltage application electrode. A liquid crystal display device in which an electric current is applied.
JP61237829A 1986-10-08 1986-10-08 Liquid crystal display Expired - Lifetime JPH0677119B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61237829A JPH0677119B2 (en) 1986-10-08 1986-10-08 Liquid crystal display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61237829A JPH0677119B2 (en) 1986-10-08 1986-10-08 Liquid crystal display

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP7180543A Division JP2547976B2 (en) 1995-06-26 1995-06-26 Liquid crystal display

Publications (2)

Publication Number Publication Date
JPS6392923A true JPS6392923A (en) 1988-04-23
JPH0677119B2 JPH0677119B2 (en) 1994-09-28

Family

ID=17021020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61237829A Expired - Lifetime JPH0677119B2 (en) 1986-10-08 1986-10-08 Liquid crystal display

Country Status (1)

Country Link
JP (1) JPH0677119B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168074A (en) * 1989-09-20 1992-12-01 Honeywell Inc. Active matrix liquid crystal display fabrication for grayscale
JP2005148083A (en) * 2003-11-11 2005-06-09 Sharp Corp Display device having liquid crystal panel
JP2019144589A (en) * 2019-04-29 2019-08-29 株式会社半導体エネルギー研究所 Liquid crystal display device
US10698277B2 (en) 2006-10-31 2020-06-30 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168074A (en) * 1989-09-20 1992-12-01 Honeywell Inc. Active matrix liquid crystal display fabrication for grayscale
JP2005148083A (en) * 2003-11-11 2005-06-09 Sharp Corp Display device having liquid crystal panel
US10698277B2 (en) 2006-10-31 2020-06-30 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
US11016354B2 (en) 2006-10-31 2021-05-25 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
US11372298B2 (en) 2006-10-31 2022-06-28 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
US11592717B2 (en) 2006-10-31 2023-02-28 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
US11860495B2 (en) 2006-10-31 2024-01-02 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device
JP2019144589A (en) * 2019-04-29 2019-08-29 株式会社半導体エネルギー研究所 Liquid crystal display device

Also Published As

Publication number Publication date
JPH0677119B2 (en) 1994-09-28

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