JP2000267594A - Display device - Google Patents

Display device

Info

Publication number
JP2000267594A
JP2000267594A JP7392999A JP7392999A JP2000267594A JP 2000267594 A JP2000267594 A JP 2000267594A JP 7392999 A JP7392999 A JP 7392999A JP 7392999 A JP7392999 A JP 7392999A JP 2000267594 A JP2000267594 A JP 2000267594A
Authority
JP
Japan
Prior art keywords
insulating film
electrode
film
display
drain signal
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.)
Pending
Application number
JP7392999A
Other languages
Japanese (ja)
Inventor
Keiichi Sano
景一 佐野
Norio Nakatani
紀夫 中谷
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP7392999A priority Critical patent/JP2000267594A/en
Priority to KR10-2000-0013558A priority patent/KR100400627B1/en
Priority to US09/527,925 priority patent/US6724443B1/en
Priority to TW089104872A priority patent/TW452669B/en
Publication of JP2000267594A publication Critical patent/JP2000267594A/en
Pending legal-status Critical Current

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

Abstract

PROBLEM TO BE SOLVED: To make it possible to suppress fluctuation in auxiliary capacitances and to obtain a good display by forming shielding films so as to cover auxiliary capacitor electrode projecting parts and capacitor electrodes constituting the capacitors. SOLUTION: The auxiliary capacitor electrode projecting parts 53 perpendicularly projecting from auxiliary capacitor electrode lines 60 are arranged in superposition on drain lines 52. Drains 13d disposed at a TFT active layer 1 consisting of a p-Si film are connected to the drain signal lines 52 and sources 13s to display electrodes 20. The sources 13s are arranged to extend so as to be superposed on the entire part of the auxiliary capacitor electrode projecting parts 53 to constitute the capacitor electrodes 54, thereby constituting the capacitors via gate insulating films between the capacitor electrodes 54 and the auxiliary capacitor electrode projecting parts 53. A second interlayer insulating film is disposed on the shielding film 18 formed via a first interlayer insulating film formed on the capacitor electrodes 54 and the drain signal lines 52 consisting of conductive material, such as A1, are formed thereon, on which a planarization insulating film consisting of an organic resin is disposed. Display electrodes 20 consisting of ITO are formed thereon.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、補助容量電極線と
半導体膜とで容量を成す表示装置に関する。
[0001] 1. Field of the Invention [0002] The present invention relates to a display device in which a capacitance is formed by an auxiliary capacitance electrode line and a semiconductor film.

【0002】[0002]

【従来の技術】近年、表示装置として、表示領域に表示
電極を駆動させるスイッチング素子として薄膜トランジ
スタ(Thin Film Transistor:以下、「TFT」と称す
る。)を備えた液晶表示装置(Liquid Crystal Displa
y:以下、「LCD」と称する。)やエレクトロルミネ
ッセンス(Electro Luminescence:以下、「EL」と称
する。)表示装置の研究開発も進められている。
2. Description of the Related Art In recent years, as a display device, a liquid crystal display device (Thin Film Transistor: hereinafter referred to as "TFT") as a switching element for driving a display electrode in a display area.
y: Hereinafter, referred to as “LCD”. ) And electroluminescence (hereinafter, referred to as “EL”) display devices are also being researched and developed.

【0003】図3にLCDの1表示画素の平面図を示
し、図4(a)に図3中のA−A線に沿った断面図を示
し、図4(b)に図3中のB−B線に沿った断面図を示
す。
FIG. 3 is a plan view of one display pixel of the LCD, FIG. 4A is a sectional view taken along the line AA in FIG. 3, and FIG. FIG. 4 shows a cross-sectional view along line -B.

【0004】図3に示すように、ゲート電極11を一部
に備えたゲート信号線51と、ドレイン電極16を一部
に備えたドレイン信号線52とに囲まれた領域に表示画
素が形成されている。両信号線の交点付近には表示電極
20を駆動するためのスイッチング素子であるTFTが
備えられている。
As shown in FIG. 3, a display pixel is formed in a region surrounded by a gate signal line 51 partially provided with a gate electrode 11 and a drain signal line 52 partially provided with a drain electrode 16. ing. Near the intersection of both signal lines, a TFT which is a switching element for driving the display electrode 20 is provided.

【0005】補助容量電極線60(図中左上から右下に
向かう斜線を付している。)はその一部が突出した補助
容量電極突出部53を備えており、その補助容量電極突
出部53はドレイン信号線52の延在方向(図中上下方
向)にそのドレイン信号線52と重畳して形成されてい
る。
[0005] The auxiliary capacitance electrode line 60 (hatched from upper left to lower right in the figure) is provided with an auxiliary capacitance electrode projection 53 partly protruding therefrom. Is formed so as to overlap with the drain signal line 52 in the direction in which the drain signal line 52 extends (vertical direction in the drawing).

【0006】図4に従ってTFT及びLCDの構造につ
いて説明する。
Referring to FIG. 4, the structure of the TFT and the LCD will be described.

【0007】図4(b)に示すように、石英ガラス、無
アルカリガラス等からなる絶縁性基板10上に、クロム
(Cr)、モリブデン(Mo)などの高融点金属からな
るゲート信号線51の一部を成すゲート電極11を備え
ている。そのゲート電極11上には、ゲート絶縁膜1
2、及び多結晶シリコン(以下、「p−Si」と称す
る。)膜からなる能動層13を順に形成し、その能動層
13には、ゲート電極11上方に真性又は実質的に真性
であるチャネル13cと、このチャネル13cの両側
に、ストッパ絶縁膜14をマスクにしてイオン注入して
形成された低濃度領域いわゆるLDD(Lightly Doped
Drain)領域を備えた構造であって、更にイオン注入を
して高濃度領域としたソース13s及びドレイン13d
が設けられている。なお、図4(a)に示すように、補
助容量電極線60から突出した補助容量電極突出部53
と能動層13のソース13sが延在されて形成された容
量電極54との間で電荷を蓄積して容量を成している。
この補助容量は、液晶22に印加される電圧を保持する
ために設けられており、表示画素の開口部の面積を大き
くするためにドレイン信号線と重畳する構造となってい
る。
As shown in FIG. 4B, a gate signal line 51 made of a refractory metal such as chromium (Cr) or molybdenum (Mo) is formed on an insulating substrate 10 made of quartz glass, alkali-free glass or the like. A gate electrode 11 forming a part is provided. The gate insulating film 1 is formed on the gate electrode 11.
2, and an active layer 13 made of a polycrystalline silicon (hereinafter referred to as “p-Si”) film is formed in order, and the active layer 13 has an intrinsic or substantially intrinsic channel above the gate electrode 11. A lightly doped region (LDD) formed by ion implantation using the stopper insulating film 14 as a mask on both sides of the channel 13c and the channel 13c.
Drain) region, and the source 13s and the drain 13d are made into a high concentration region by further ion implantation.
Is provided. As shown in FIG. 4A, the auxiliary capacitance electrode projecting portion 53 projecting from the auxiliary capacitance electrode line 60 is provided.
A charge is accumulated between the capacitor and a capacitor electrode 54 formed by extending the source 13s of the active layer 13 to form a capacitor.
The auxiliary capacitance is provided to hold a voltage applied to the liquid crystal 22, and has a structure overlapping with the drain signal line in order to increase the area of the opening of the display pixel.

【0008】そして、図4(b)に示すように、ゲート
絶縁膜12、能動層13及びストッパ絶縁膜14上の全
面には、SiO2膜、SiN膜及びSiO2膜の順に積層
された層間絶縁膜15を設け、ドレイン13dに対応し
て設けたコンタクトホールにAl等の金属を充填してド
レイン電極16を設ける。このとき図4(a)に示すよ
うに、ドレイン電極16と同時に形成されるドレイン信
号線52を補助容量電極突出部53の上方に配置する。
更に全面にSiO2膜、SiN膜及びSiO2膜の順に積
層された層間絶縁膜17を設ける。その上には、表示電
極20からの透過光以外、例えば表示電極20の周辺か
らの透過光を遮光するように遮蔽膜18が設けられてい
る。更にその上には例えば有機樹脂から成り表面を平坦
にする平坦化絶縁膜19を設ける。
As shown in FIG. 4B, an SiO 2 film, a SiN film and an SiO 2 film are stacked in this order on the entire surface of the gate insulating film 12, the active layer 13 and the stopper insulating film 14. An insulating film 15 is provided, and a contact hole provided corresponding to the drain 13d is filled with a metal such as Al to form a drain electrode 16. At this time, as shown in FIG. 4A, the drain signal line 52 formed simultaneously with the drain electrode 16 is arranged above the auxiliary capacitance electrode projection 53.
Further, an interlayer insulating film 17 is provided on the entire surface in the order of a SiO 2 film, a SiN film and a SiO 2 film. On top of that, a shielding film 18 is provided so as to block the transmitted light from around the display electrode 20 other than the transmitted light from the display electrode 20. Further, a flattening insulating film 19 made of, for example, an organic resin and flattening the surface is provided thereon.

【0009】そして、その平坦化絶縁膜19、層間絶縁
膜17及び層間絶縁膜15のソース13sに対応した位
置にコンタクトホールを形成し、このコンタクトホール
を介してソース13sとコンタクトしたITO(Indium
Tin Oxide)から成る表示電極20を平坦化絶縁膜19
上に設ける。
A contact hole is formed at a position corresponding to the source 13s of the planarizing insulating film 19, the interlayer insulating film 17, and the interlayer insulating film 15, and an ITO (Indium) contacting the source 13s through the contact hole.
The display electrode 20 made of Tin Oxide) is flattened by the insulating film 19.
Provided above.

【0010】その表示電極20及び平坦化絶縁膜19上
に、液晶22を配向する配向膜21を形成する。
On the display electrode 20 and the flattening insulating film 19, an alignment film 21 for aligning the liquid crystal 22 is formed.

【0011】こうして、TFTを備えたTFT基板10
が完成する。
Thus, the TFT substrate 10 provided with the TFT
Is completed.

【0012】このTFT基板10に対向して設けられる
対向電極基板30には、基板30側から順に透明材料か
ら成る対向電極31、及び有機樹脂等から成る配向膜3
2が形成されている。
A counter electrode substrate 30 provided to face the TFT substrate 10 includes a counter electrode 31 made of a transparent material and an alignment film 3 made of an organic resin or the like in order from the substrate 30 side.
2 are formed.

【0013】これらの両基板10,30を互いに対向さ
せてそれらの周囲をシール接着材にて接着して両基板の
間隙に液晶22を充填し、両基板の外側に偏光板33を
貼ってLCDが完成する。
The substrates 10 and 30 are opposed to each other, the periphery thereof is adhered with a sealing adhesive, the gap between the substrates is filled with the liquid crystal 22, and the polarizing plate 33 is adhered to the outside of the substrates to form an LCD. Is completed.

【0014】[0014]

【発明が解決しようとする課題】上述のように、補助容
量は補助容量電極線60と容量電極54との間の容量だ
けでは十分でないため、開口率を低下させないドレイン
信号線52と重畳した領域において、補助容量電極突出
部53と容量電極54との間でも補助容量を成してい
る。
As described above, since the auxiliary capacitance is not sufficient just by the capacitance between the auxiliary capacitance electrode line 60 and the capacitance electrode 54, the area overlapping with the drain signal line 52 which does not decrease the aperture ratio. , The auxiliary capacitance is also formed between the auxiliary capacitance electrode projection 53 and the capacitance electrode 54.

【0015】ところが、補助容量電極突出部53と容量
電極54との間の補助容量については、p−Si膜から
成っている容量電極54の上方にドレイン信号線52が
形成された構造である。そのため、ドレイン信号線52
と容量電極54との間で容量カップリングを起こしてし
まい、1水平同期期間ごとに変化するドレイン信号線5
2に印加された電圧に追従して容量電極54に印加され
る電圧が、本来保持されるべき電圧に対して変化してし
まうことになる。それによって表示電極20に印加され
る電圧も変化するため、保持電圧、即ち液晶22に印加
される実効電圧が小さくなってしまい表示が白くなり、
コントラストの低下を引き起こすという欠点があった。
However, the auxiliary capacitance between the auxiliary capacitance electrode projection 53 and the capacitance electrode 54 has a structure in which the drain signal line 52 is formed above the capacitance electrode 54 made of a p-Si film. Therefore, the drain signal line 52
Capacitance coupling occurs between the drain signal line 5 and the drain electrode 5 which changes every horizontal synchronization period.
The voltage applied to the capacitor electrode 54 following the voltage applied to 2 changes with respect to the voltage that should be originally held. As a result, the voltage applied to the display electrode 20 also changes, so that the holding voltage, that is, the effective voltage applied to the liquid crystal 22 decreases, and the display becomes white,
There is a disadvantage that the contrast is reduced.

【0016】そこで本発明は、上記の従来の欠点に鑑み
て為されたものであり、補助容量の変動を抑制して良好
な表示を得ることが可能な表示装置を提供することを目
的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional disadvantages, and has as its object to provide a display device capable of suppressing fluctuations in the auxiliary capacitance and obtaining a good display. .

【0017】[0017]

【課題を解決するための手段】本発明の表示装置は、絶
縁性基板上に複数のゲート信号線及び複数のドレイン信
号線に囲まれた各領域に表示画素が配列されており、該
各表示画素に対応して容量を成す補助容量電極線を備え
た表示装置であって、前記補助容量電極線の一部を前記
ドレイン信号線の延在方向に突出させて配置した補助容
量電極突出部と、該補助容量電極突出部と第1の絶縁膜
を介して容量を成す半導体膜と、第2の絶縁膜を介して
前記半導体膜を覆うように設けられた遮蔽膜と、該遮蔽
膜と第3の絶縁膜を介して前記遮蔽膜上に設けられた前
記ドレイン信号線と、該ドレイン信号線上の第4の絶縁
膜を介して設けられた表示電極とを備えたものである。
According to the display device of the present invention, display pixels are arranged in each region surrounded by a plurality of gate signal lines and a plurality of drain signal lines on an insulating substrate. A display device including an auxiliary capacitance electrode line forming a capacitance corresponding to a pixel, wherein an auxiliary capacitance electrode projection portion is provided in which a part of the auxiliary capacitance electrode line is arranged to protrude in an extending direction of the drain signal line. A semiconductor film forming a capacitance via the auxiliary capacitance electrode projection and the first insulating film; a shielding film provided to cover the semiconductor film via a second insulating film; 3. The drain signal line provided on the shielding film via the insulating film of No. 3, and the display electrode provided on the drain signal line via a fourth insulating film.

【0018】また、本発明の表示装置は、前記遮蔽膜が
不透明材料から成る表示装置である。
Further, the display device of the present invention is a display device in which the shielding film is made of an opaque material.

【0019】[0019]

【発明の実施の形態】本発明の表示装置をLCDに適用
した場合について説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where the display device of the present invention is applied to an LCD will be described.

【0020】図1にLCDの1表示画素を表す平面図を
示し、図2(a)に図1中のA−A線に沿った断面図を
示し、図2(b)に図1中のB−B線に沿った断面図を
示す。
FIG. 1 is a plan view showing one display pixel of the LCD, FIG. 2A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG. 3 shows a cross-sectional view along the line BB.

【0021】図1に示すように、一部にゲート電極11
を備えた複数のゲート信号線51(図中右上から左下に
向かう斜線を付している。)と複数のドレイン信号線5
2とに囲まれた各領域には表示画素を成す表示電極20
がそれぞれ形成されており、その表示電極20はTFT
に接続されている。
As shown in FIG. 1, a gate electrode 11 is partially formed.
And a plurality of drain signal lines 5 (hatched from upper right to lower left in the figure).
The display electrodes 20 forming display pixels are provided in each region surrounded by
Are formed, and the display electrode 20 is formed by a TFT.
It is connected to the.

【0022】このとき、補助容量電極線60から垂直に
突出した補助容量電極突出部53は、ドレイン信号線5
2の延在方向(図中上下方向)に延在しており、ドレイ
ン信号線52と重畳して配置されている。
At this time, the auxiliary capacitance electrode projection 53 projecting vertically from the auxiliary capacitance electrode line 60 is connected to the drain signal line 5.
2 extend in the extending direction (vertical direction in the figure), and are arranged so as to overlap with the drain signal line 52.

【0023】図2(b)に示すように、TFTの能動層
13はp−Si膜から成っており、能動層13に設けら
れたドレイン13dはドレイン信号線52に接続されて
おり、ソース13sは表示電極20に接続されている。
As shown in FIG. 2B, the active layer 13 of the TFT is formed of a p-Si film, the drain 13d provided on the active layer 13 is connected to the drain signal line 52, and the source 13s Are connected to the display electrode 20.

【0024】また、ゲート電極11とゲート絶縁膜12
を介して重畳した能動層13にはチャネル13cを形成
している。本実施の形態においてはダブルゲート構造を
成しているのでチャネル13cは2つある。
The gate electrode 11 and the gate insulating film 12
A channel 13c is formed in the active layer 13 superimposed through the channel 13c. In the present embodiment, there are two channels 13c because of the double gate structure.

【0025】更にソース13sは、補助容量電極突出部
53の全体と重畳するように延在して配置されて容量電
極54を成している。そうしてこの容量電極と補助容量
電極突出部53との間のゲート絶縁膜12を介して容量
を成している。容量電極54は能動層13の形成と同時
にp−Si膜で形成されている。
Further, the source 13 s is disposed so as to extend so as to overlap the entire auxiliary capacitance electrode projection 53, thereby forming a capacitance electrode 54. Thus, a capacitance is formed between the capacitance electrode and the auxiliary capacitance electrode protrusion 53 via the gate insulating film 12. The capacitance electrode 54 is formed of a p-Si film simultaneously with the formation of the active layer 13.

【0026】この容量電極54上に形成された第1の層
間絶縁膜15を介して遮蔽膜18が形成されている。こ
の遮蔽膜18の上には第2の層間絶縁膜17を設け、そ
の上にAl等の導電材料から成るドレイン信号線52を
形成している。そして、ドレイン信号線52の上には有
機樹脂から成り表面を平坦にする平坦化絶縁膜19を設
け、その上にITOから成る表示電極20を形成してい
る。
A shielding film 18 is formed via a first interlayer insulating film 15 formed on the capacitance electrode 54. A second interlayer insulating film 17 is provided on the shielding film 18, and a drain signal line 52 made of a conductive material such as Al is formed thereon. A flattening insulating film 19 made of an organic resin and flattening the surface is provided on the drain signal line 52, and a display electrode 20 made of ITO is formed thereon.

【0027】図2に従ってLCDの構造を説明する。The structure of the LCD will be described with reference to FIG.

【0028】図2(b)に示すように、石英ガラス、無
アルカリガラス等からなる絶縁性基板10上に、Cr、
Moなどの高融点金属からなるゲート信号線51及びそ
の一部を成すゲート電極11を設ける。そのゲート電極
11上には、第1の絶縁膜であるゲート絶縁膜12、及
びp−Si膜からなる能動層13を順に形成し、その能
動層13には、ゲート電極11上方に真性又は実質的に
真性であるチャネル13cと、このチャネル13cの両
側に、ストッパ絶縁膜14をマスクにしてイオン注入し
て形成された低濃度領域いわゆるLDD領域を備えてお
り、更にイオン注入をして高濃度領域としたソース13
s及びドレイン13dが設けられている。なお、図2
(a)に示すように、補助容量電極線51から突出した
補助容量電極突出部53と能動層13のソース13sが
延在されて形成された容量電極54との間で電荷を蓄積
して容量を成している。この容量は液晶22に印加され
る電圧を保持するために設けられている補助容量であ
る。補助容量電極突出部53はゲート電極11及びゲー
ト信号線51と同時に形成する。
As shown in FIG. 2B, on an insulating substrate 10 made of quartz glass, non-alkali glass or the like, Cr,
A gate signal line 51 made of a refractory metal such as Mo and a gate electrode 11 forming a part thereof are provided. On the gate electrode 11, a gate insulating film 12, which is a first insulating film, and an active layer 13 made of a p-Si film are formed in this order. A channel 13c which is intrinsically intrinsic and a low-concentration region so-called LDD region formed by ion implantation using the stopper insulating film 14 as a mask on both sides of the channel 13c are provided. Source 13 as an area
s and a drain 13d are provided. Note that FIG.
As shown in (a), the capacitance is accumulated between the auxiliary capacitance electrode projection 53 protruding from the auxiliary capacitance electrode line 51 and the capacitance electrode 54 formed by extending the source 13 s of the active layer 13, and the capacitance is accumulated. Has formed. This capacitance is an auxiliary capacitance provided for holding a voltage applied to the liquid crystal 22. The auxiliary capacitance electrode projection 53 is formed simultaneously with the gate electrode 11 and the gate signal line 51.

【0029】そして、ゲート絶縁膜12、能動層13及
びストッパ絶縁膜14上の全面には、例えばSiO
2膜、SiN膜及びSiO2膜の順に積層された第2の絶
縁膜である層間絶縁膜15を設ける。
The entire surface of the gate insulating film 12, the active layer 13, and the stopper insulating film 14 is formed of, for example, SiO 2
There is provided an interlayer insulating film 15 which is a second insulating film laminated in order of two films, a SiN film and a SiO 2 film.

【0030】その上に光を遮光する不透明材料である金
属、例えばCr、Mo、チタン(Ti)などから成る遮
蔽膜18を形成する。更に全面に例えばSiO2膜、S
iN膜及びSiO2膜の順に積層されて成る第3の絶縁
膜である層間絶縁膜17を設ける。そして、層間絶縁膜
15及び層間絶縁膜17に、ドレイン13dに対応して
設けたコンタクトホールにAl等の金属を充填してドレ
イン電極16を設ける。このとき図2(a)に示すよう
に、ドレイン電極16と同時に形成されるドレイン信号
線52をゲート電極11の突出部53の上方に配置す
る。
A shielding film 18 made of a metal which is an opaque material for shielding light, for example, Cr, Mo, titanium (Ti) or the like is formed thereon. Further, for example, an SiO 2 film, S
An interlayer insulating film 17, which is a third insulating film formed by laminating an iN film and a SiO 2 film in this order, is provided. Then, a drain electrode 16 is provided by filling a metal such as Al into a contact hole provided in the interlayer insulating film 15 and the interlayer insulating film 17 corresponding to the drain 13d. At this time, as shown in FIG. 2A, the drain signal line 52 formed simultaneously with the drain electrode 16 is disposed above the protrusion 53 of the gate electrode 11.

【0031】更にその上には例えば有機樹脂から成り表
面を平坦にする第4の絶縁膜である平坦化絶縁膜19を
設ける。
Further, a flattening insulating film 19, which is made of, for example, an organic resin and is a fourth insulating film for flattening the surface, is provided thereon.

【0032】そして、その平坦化絶縁膜19、層間絶縁
膜17及び層間絶縁膜15のソース13sに対応した位
置にコンタクトホールを形成し、このコンタクトホール
を介してソース13sとコンタクトした透明導電材料で
あるITOから成る表示電極20を平坦化絶縁膜19上
に設ける。
Then, a contact hole is formed at a position corresponding to the source 13s of the planarizing insulating film 19, the interlayer insulating film 17, and the interlayer insulating film 15, and a transparent conductive material which is in contact with the source 13s through the contact hole. A display electrode 20 made of a certain ITO is provided on the planarization insulating film 19.

【0033】その表示電極20及び平坦化絶縁膜19上
に、液晶22を配向する配向膜21を形成する。
On the display electrode 20 and the flattening insulating film 19, an alignment film 21 for aligning the liquid crystal 22 is formed.

【0034】こうして、TFTを備えたTFT基板10
が完成する。
Thus, the TFT substrate 10 having the TFT
Is completed.

【0035】このTFT基板10に対向して設けられる
対向電極基板30には、基板30側から順に透明導電材
料から成る対向電極31、及び有機樹脂等から成る配向
膜32が形成されている。
On a counter electrode substrate 30 provided to face the TFT substrate 10, a counter electrode 31 made of a transparent conductive material and an alignment film 32 made of an organic resin or the like are formed in this order from the substrate 30 side.

【0036】これらの両基板10,30を互いに対向さ
せてそれらの周囲をシール接着材にて接着して両基板の
間隙に液晶22を充填し、両基板の外側に偏光板33を
貼ってLCDが完成する。
The substrates 10, 30 are opposed to each other, the periphery thereof is adhered with a sealing adhesive, the gap between the substrates is filled with the liquid crystal 22, and the polarizing plate 33 is attached to the outside of the substrates to form an LCD. Is completed.

【0037】ここで、この遮蔽膜18はTFT領域にお
いてはTFTのチャネル13cを覆うように形成され、
補助容量を形成する領域においては補助容量電極突出部
53と容量を成す容量電極54を覆うように形成されて
いる。
Here, this shielding film 18 is formed so as to cover the channel 13c of the TFT in the TFT region.
In the region where the storage capacitor is formed, the storage capacitor electrode is formed so as to cover the storage capacitor electrode projecting portion 53 and the capacitor electrode 54 forming a capacitor.

【0038】そうすることにより、表示電極20の周囲
の漏れ光を遮蔽することができるとともに、p−Siか
ら成る容量電極54とドレイン信号線52との容量カッ
プリングを防止することができ、ドレイン信号線52に
印加された電圧による容量電極54への影響を抑制で
き、保持電圧が小さくなることを抑制することができ
る。
By doing so, the leakage light around the display electrode 20 can be shielded, and the capacitance coupling between the capacitance electrode 54 made of p-Si and the drain signal line 52 can be prevented. The effect on the capacitor electrode 54 due to the voltage applied to the signal line 52 can be suppressed, and the holding voltage can be suppressed from decreasing.

【0039】そのため、従来のようにドレイン信号線に
印加され1水平期間ごとに変化する電圧に応じて、表示
電極に印加される電圧が変動して表示として白くなるこ
とを防止することができ、コントラストの低下を防止す
ることができる。
Therefore, it is possible to prevent the voltage applied to the display electrode from fluctuating in accordance with the voltage applied to the drain signal line and changing every horizontal period as in the related art, and to prevent the display from becoming white. It is possible to prevent a decrease in contrast.

【0040】なお、上述の各実施の形態においては、能
動層の半導体膜としてp−Si膜を用いたが、微結晶シ
リコン膜又は非晶質シリコン膜を用いても良い。
In each of the above embodiments, the p-Si film is used as the semiconductor film of the active layer. However, a microcrystalline silicon film or an amorphous silicon film may be used.

【0041】また、本実施の形態においては、LCDに
適用した場合を示したが、本発明はそれに限定されるも
のではなく、有機EL表示装置に適用しても本発明と同
様の効果を得ることができる。
In this embodiment, the case where the present invention is applied to an LCD is shown. However, the present invention is not limited to this. Even when applied to an organic EL display device, the same effects as those of the present invention can be obtained. be able to.

【0042】[0042]

【発明の効果】本発明によれば、1水平同期期間ごとに
変化するドレイン信号線に印加される電圧に関係なく一
定の保持電圧を得ることができるので、明るさがふらつ
いた表示を得ることなく良好な表示を得られる表示装置
を得ることができる。
According to the present invention, a constant holding voltage can be obtained irrespective of the voltage applied to the drain signal line which changes every one horizontal synchronization period, so that a display with uneven brightness can be obtained. And a display device capable of obtaining good display can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明をLCDに適用した場合の実施の形態を
示す平面図である。
FIG. 1 is a plan view showing an embodiment when the present invention is applied to an LCD.

【図2】本発明をLCDに適用した場合の実施の形態を
示す断面図である。
FIG. 2 is a cross-sectional view showing an embodiment when the present invention is applied to an LCD.

【図3】従来のLCDの平面図である。FIG. 3 is a plan view of a conventional LCD.

【図4】従来のLCDの断面図である。FIG. 4 is a cross-sectional view of a conventional LCD.

【符号の説明】[Explanation of symbols]

10 TFT基板 11 ゲート電極 13s ソース 13d ドレイン 13c チャネル 16 ドレイン電極 18 遮蔽膜 20 表示電極 30 対向電極基板 51 ゲート信号線 52 ドレイン信号線 53 補助容量電極突出部 54 容量電極 DESCRIPTION OF SYMBOLS 10 TFT substrate 11 Gate electrode 13s Source 13d Drain 13c Channel 16 Drain electrode 18 Shielding film 20 Display electrode 30 Counter electrode substrate 51 Gate signal line 52 Drain signal line 53 Auxiliary capacity electrode projection 54 Capacity electrode

フロントページの続き Fターム(参考) 2H092 GA29 HA28 JA24 JA41 JA46 JB51 JB58 JB69 KB15 KB22 KB25 NA01 NA22 PA01 PA11 5C094 AA06 AA07 AA54 BA03 BA29 BA43 CA19 DA13 DA15 DB04 EA04 EA10 ED15 FA01 FA02Continued on the front page F-term (reference) 2H092 GA29 HA28 JA24 JA41 JA46 JB51 JB58 JB69 KB15 KB22 KB25 NA01 NA22 PA01 PA11 5C094 AA06 AA07 AA54 BA03 BA29 BA43 CA19 DA13 DA15 DB04 EA04 EA10 ED15 FA01 FA02

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 絶縁性基板上に複数のゲート信号線及び
複数のドレイン信号線に囲まれた各領域に表示画素が配
列されており、該各表示画素に対応して容量を成す補助
容量電極線を備えた表示装置であって、 前記補助容量電極線の一部を前記ドレイン信号線の延在
方向に突出させて配置した補助容量電極突出部と、該補
助容量電極突出部と第1の絶縁膜を介して容量を成す半
導体膜と、第2の絶縁膜を介して前記半導体膜を覆うよ
うに設けられた遮蔽膜と、該遮蔽膜と第3の絶縁膜を介
して前記遮蔽膜上に設けられた前記ドレイン信号線と、
該ドレイン信号線上の第4の絶縁膜を介して設けられた
表示電極とを備えたことを特徴とする表示装置。
A display pixel is arranged in each region surrounded by a plurality of gate signal lines and a plurality of drain signal lines on an insulating substrate, and an auxiliary capacitance electrode forming a capacitance corresponding to each display pixel. A display device comprising: a storage capacitor electrode protruding portion in which a part of the storage capacitor electrode line is protruded in a direction in which the drain signal line extends; A semiconductor film forming a capacitor with an insulating film interposed therebetween, a shielding film provided to cover the semiconductor film with a second insulating film interposed therebetween, and a shielding film provided on the shielding film with the shielding film and a third insulating film interposed therebetween. The drain signal line provided in
A display electrode provided on the drain signal line with a fourth insulating film interposed therebetween.
【請求項2】 前記遮蔽膜が不透明材料から成ることを
特徴とする請求項1に記載の表示装置。
2. The display device according to claim 1, wherein the shielding film is made of an opaque material.
JP7392999A 1999-03-18 1999-03-18 Display device Pending JP2000267594A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7392999A JP2000267594A (en) 1999-03-18 1999-03-18 Display device
KR10-2000-0013558A KR100400627B1 (en) 1999-03-18 2000-03-17 Active matrix type display apparatus
US09/527,925 US6724443B1 (en) 1999-03-18 2000-03-17 Active matrix type display device
TW089104872A TW452669B (en) 1999-03-18 2000-03-17 Active matrix type display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7392999A JP2000267594A (en) 1999-03-18 1999-03-18 Display device

Publications (1)

Publication Number Publication Date
JP2000267594A true JP2000267594A (en) 2000-09-29

Family

ID=13532326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7392999A Pending JP2000267594A (en) 1999-03-18 1999-03-18 Display device

Country Status (1)

Country Link
JP (1) JP2000267594A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352955A (en) * 2001-03-19 2002-12-06 Seiko Epson Corp Manufacturing method of display device, the display device, and electronic device
KR100453634B1 (en) * 2001-12-29 2004-10-20 엘지.필립스 엘시디 주식회사 an active matrix organic electroluminescence display
KR100493435B1 (en) * 2001-12-20 2005-06-07 엘지.필립스 엘시디 주식회사 Liquid Crystal Display Device And Fabricating Method Thereof
KR100627333B1 (en) 2004-04-29 2006-09-25 삼성에스디아이 주식회사 An organic electro-luminescence light emitting cell, and a manufacturing method therof
JP2007333835A (en) * 2006-06-13 2007-12-27 Casio Comput Co Ltd Thin film transistor panel and liquid crystal display
JP2008209732A (en) * 2007-02-27 2008-09-11 Sharp Corp Thin film transistor array substrate, manufacturing method thereof and liquid crystal display device
JP2014010435A (en) * 2012-07-03 2014-01-20 Dainippon Printing Co Ltd Display panel and display device including display panel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352955A (en) * 2001-03-19 2002-12-06 Seiko Epson Corp Manufacturing method of display device, the display device, and electronic device
KR100493435B1 (en) * 2001-12-20 2005-06-07 엘지.필립스 엘시디 주식회사 Liquid Crystal Display Device And Fabricating Method Thereof
KR100453634B1 (en) * 2001-12-29 2004-10-20 엘지.필립스 엘시디 주식회사 an active matrix organic electroluminescence display
KR100627333B1 (en) 2004-04-29 2006-09-25 삼성에스디아이 주식회사 An organic electro-luminescence light emitting cell, and a manufacturing method therof
JP2007333835A (en) * 2006-06-13 2007-12-27 Casio Comput Co Ltd Thin film transistor panel and liquid crystal display
JP2008209732A (en) * 2007-02-27 2008-09-11 Sharp Corp Thin film transistor array substrate, manufacturing method thereof and liquid crystal display device
JP2014010435A (en) * 2012-07-03 2014-01-20 Dainippon Printing Co Ltd Display panel and display device including display panel

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