JPH049313B2 - - Google Patents
Info
- Publication number
- JPH049313B2 JPH049313B2 JP57190256A JP19025682A JPH049313B2 JP H049313 B2 JPH049313 B2 JP H049313B2 JP 57190256 A JP57190256 A JP 57190256A JP 19025682 A JP19025682 A JP 19025682A JP H049313 B2 JPH049313 B2 JP H049313B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrodes
- display panel
- transparent electrode
- display
- 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
- 239000007769 metal material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- GSDLWVWZLHUANO-UHFFFAOYSA-N zinc;manganese(2+);disulfide Chemical compound [S-2].[S-2].[Mn+2].[Zn+2] GSDLWVWZLHUANO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】
(a) 発明の技術分野
本発明は表示パネルに係り、特にＸ−Ｙマトリ
ツクス形の電極配置の表示パネルの高抵抗の透明
電極の構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a display panel, and more particularly to an improvement in the structure of a high-resistance transparent electrode in a display panel having an X-Y matrix electrode arrangement.
(b) 従来技術と問題点
近年平板形のドツトマトリツクス形表示装置と
してEL表示パネルや液晶表示パネルが盛んに開
発実用化されている。周知の如く、これらの表示
パネルはその基板上に形成された表示媒体を挟ん
で、その両面に互いに直交する方向に配設された
多数の平行線状の前面電極群と背面電極群とを有
し、該電極群の対向交叉点で表示セルを画定して
いる。(b) Prior Art and Problems In recent years, EL display panels and liquid crystal display panels have been actively developed and put into practical use as flat dot matrix display devices. As is well known, these display panels have a large number of parallel line-shaped front electrode groups and back electrode groups arranged on both sides of the substrate in directions orthogonal to each other, sandwiching a display medium formed on the substrate. A display cell is defined by the opposing intersection points of the electrode group.
上記表示パネルの表示側に配設される前面電極
は当然透明な電極でなければならず、それには例
えばインジユウム錫酸化物（ITO）などの透明電
導膜が用いられている。これらの物質の電気抵抗
値は高い（ITOの抵抗率は約５×10-4Ωcm）の
で、透明電極の抵抗と表示セルの容量から決まる
時定数は該表示パネルを駆動するのに無視できな
い値となり、、輝度の不均一の原因となつている。 The front electrode disposed on the display side of the display panel must naturally be a transparent electrode, and a transparent conductive film such as indium tin oxide (ITO) is used for it. These materials have high electrical resistance values (the resistivity of ITO is approximately 5 × 10 -4 Ωcm), so the time constant determined by the resistance of the transparent electrode and the capacity of the display cell has a value that cannot be ignored to drive the display panel. This causes uneven brightness.
透明電極１本当りｎ個のセルを有する表示パネ
ルの１本の透明電極の電気的等価回路を第１図に
示す。ｒは１セル当りの透明電極の等価電気抵
抗、C0は１セル当りの等価電気容量である。 FIG. 1 shows an electrical equivalent circuit of one transparent electrode of a display panel having n cells per transparent electrode. r is the equivalent electrical resistance of the transparent electrode per cell, and C 0 is the equivalent electrical capacitance per cell.
駆動点よりみた最近点Ｐのセル立ち上がり時間
は近似的に1/2rCoであるのに対し最遠点Ｑでの
立ち上がり時間t1は
t1≒1.1n2rCo0 (1)
となるため、最近点Ｐと最遠点Ｑとでセル電圧波
形の立ち上がり時間が大きく遠い、これが輝度の
不均一となつて現れる。 The cell rise time at the nearest point P as seen from the driving point is approximately 1/2rCo, while the rise time t 1 at the farthest point Q is t 1 ≒ 1.1n 2 rCo0 (1). The rise time of the cell voltage waveform between P and the farthest point Q is very different, and this appears as non-uniform brightness.
上記の問題を解決するために、透明電極を抵抗
化する等、様々の手段がとられている。 In order to solve the above problems, various measures have been taken, such as making the transparent electrode resistive.
普通には透明電極に低抵抗金属の低抵抗電極を
附設する方法がとられている。即ち、第２図の斜
視図に示すように、例えばガラス基板１上に線状
の透明電極２を形成し、その透明電極２の上面の
両側（あるいは片側）に低抵抗金属の線巾の細い
低抵抗電極２ａを配設した構成がとられている。 Usually, a method is used in which a low resistance electrode made of a low resistance metal is attached to a transparent electrode. That is, as shown in the perspective view of FIG. 2, for example, a linear transparent electrode 2 is formed on a glass substrate 1, and a thin line of low-resistance metal is formed on both sides (or one side) of the upper surface of the transparent electrode 2. A configuration is adopted in which a low resistance electrode 2a is provided.
この構成を採用する場合は、前記低抵抗電極２
ａの製作が容易でないことや、前記透明電極２の
全抵抗分Ｒ＝nrが極く小さくなるのでセルの全容
量Ｃ＝nC0に対する充放電電流は総て駆動トラン
ジスタの出力インピーダンスR1で熱に変換され
るために、トランジスタは発熱し、その為に駆動
出来るセルの数が制限されるというい問題等が発
生し、その解決が望まれていた。 When adopting this configuration, the low resistance electrode 2
A is not easy to manufacture, and since the total resistance R=nr of the transparent electrode 2 is extremely small, the charging/discharging current for the total cell capacity C=nC0 is entirely converted into heat by the output impedance R1 of the drive transistor. Due to the conversion, the transistor generates heat, which limits the number of cells that can be driven.Therefore, a solution has been desired.
(c) 発明の目的
本発明は前述の点に鑑みなされたもので、透明
電極の低抵抗化をしないで、補助電極により透明
電極の両端を短絡して最遠点セルの立ち上がり時
間を短縮することで前述の各セルの輝度ムラの問
題を解決しようとするものである。(c) Purpose of the Invention The present invention has been made in view of the above-mentioned points, and it shortens the rise time of the farthest point cell by short-circuiting both ends of the transparent electrode with an auxiliary electrode without reducing the resistance of the transparent electrode. This is an attempt to solve the aforementioned problem of uneven brightness in each cell.
(d) 発明の構成
上記の本発明の目的は、表示媒体の両側に互い
に対向配置した複数の前面電極と背面電極とを有
し、該前面電極を構成する透明電極との各対向領
域で表示セルを確定してなる表示パネルにおい
て、前記各背面電極の表示媒体側とは反対側の電
極表面に絶縁層を形成し、該絶縁層上に金属材料
の配線層より成る複数の補助電極を配設するとと
もに、該補助電極の両端を対応する前記複数の前
面電極の両端に接続したことを特徴とする表示パ
ネルより達成される。(d) Structure of the Invention It is an object of the present invention to provide display media with a plurality of front electrodes and back electrodes arranged opposite to each other on both sides of a display medium, and display in each region facing the transparent electrodes constituting the front electrodes. In a display panel formed by determining cells, an insulating layer is formed on the surface of the electrode on the side opposite to the display medium side of each of the back electrodes, and a plurality of auxiliary electrodes made of a wiring layer of a metal material are arranged on the insulating layer. This is achieved by a display panel characterized in that both ends of the auxiliary electrodes are connected to both ends of the plurality of corresponding front electrodes.
(e) 発明の実施例
上記の問題を解決するために、透明電極２の両
端を低抵抗の補助電極４でその両端を短絡する
と、その電気的等価回路は第３図に示すようにな
り、駆動側より見た最遠点Ｑ、即ち中央のセルの
立ち上がり時間t2は駆動点よりＱ点までのセル数
が1/2ｎであるので、(1)式のｎの代わりに1/2ｎを
代入して
t2≒1.1（1/2ｎ）2rC0≒1/4t1 (2)
となる。即ち最遠点Ｑの立ち上がり時間は従来の
１／４に短縮されてセル間の輝度ラムは大幅に改良
される結果となる。以下、具体的な実施例を第４
図に従つて説明しよう。(e) Embodiments of the Invention In order to solve the above problem, both ends of the transparent electrode 2 are short-circuited with a low-resistance auxiliary electrode 4, and the electrical equivalent circuit becomes as shown in FIG. For the farthest point Q seen from the driving side, that is, the rise time t2 of the center cell, the number of cells from the driving point to the Q point is 1/2n, so 1/2n is substituted for n in equation (1). By substituting, t 2 ≒1.1 (1/2n) 2 rC0≒1/4t 1 (2). That is, the rise time at the farthest point Q is shortened to 1/4 of the conventional value, resulting in a significant improvement in the luminance ram between cells. Below, we will discuss specific examples in the fourth section.
Let's explain according to the diagram.
第４図ａは本発明に基づく新しい電極構造を有
する表示パネルの一実施例を示す概念的な平面
図、第４図ｂは同じく断面図である。ガラス基板
１の上に透明電極２により構成された前面電極を
蒸着法で形成し、その上に表示媒体５、前記透明
電極に直交するアルミニウム蒸着層よりなる背面
電極３を配設する。ここまでは従来の表示パネル
の構造と変わりないが、本発明によれば、さらに
アルミナ等の絶縁層６を形成し、その上に前記の
透明電極２と全く一のパターンでアルミニウム等
の金属蒸着層よりなる補助電極４を形成し、該補
助電極４で前記透明電極２の両端を連結して短絡
する。第４図ｂのＸ−Ｘ線に沿つた拡大断面図を
第５図に示す。表示媒体５は図に見るように、酸
化イツトリウム等の誘電体層７に挟まれた硫化亜
鉛−マンガン等のEL発光層より構成されている
ことが判る。 FIG. 4a is a conceptual plan view showing an embodiment of a display panel having a new electrode structure based on the present invention, and FIG. 4b is a sectional view of the same. A front electrode made of a transparent electrode 2 is formed on a glass substrate 1 by a vapor deposition method, and a display medium 5 and a back electrode 3 made of an aluminum vapor deposited layer orthogonal to the transparent electrode are arranged thereon. The structure up to this point is the same as the conventional display panel, but according to the present invention, an insulating layer 6 such as alumina is further formed, and a metal such as aluminum is deposited on it in exactly the same pattern as the transparent electrode 2. An auxiliary electrode 4 made of a layer is formed, and both ends of the transparent electrode 2 are connected and short-circuited by the auxiliary electrode 4. FIG. 5 shows an enlarged sectional view taken along line X--X in FIG. 4b. As shown in the figure, the display medium 5 is composed of an EL light emitting layer made of zinc sulfide-manganese or the like sandwiched between dielectric layers 7 made of yttrium oxide or the like.
なお、上述のような工程で形成された補助電極
４を利用すると前記透明電極２と背面電極３を駆
動する能動回路素子９，１０を表示パネル上に直
接配設することが出来る。第６図はこの構造を概
念的に示す平面図である。 Note that by using the auxiliary electrode 4 formed in the above-described process, the active circuit elements 9 and 10 for driving the transparent electrode 2 and the back electrode 3 can be directly disposed on the display panel. FIG. 6 is a plan view conceptually showing this structure.
元来前記表示パネルの多数の各電極は一本宛外
部の駆動回路に接続するを要し、一々フラツトケ
ーブルをコネクタを介して接続するため、その目
合わせ作業等に多くの工数を費やしている。今、
上記の補助電極に透明電極２の駆動用能動素子９
を半田付け法等で付設してデータ信号を送り、一
方ガラス基体１の上に図に示していない背面電極
３の電極端末に接続する配線を蒸着法で予め形成
しておき、その上に半田付け法等で駆動用能動素
子１０を配設してスキヤニング信号を前記背面電
極３に送る。そうすると、外部回路と当該表示パ
ネルとの結線は駆動用能動素子９，１０に対する
電源、接地、クロツク、データ信号のための配線
に限られるのづその配線本数は従来より一桁少な
くなり、表示パネルと外部回路との接続工数は減
少し、そのため製品の原価は低下し信頼性も高く
なる。 Originally, each of the large number of electrodes on the display panel had to be connected to an external drive circuit one by one, and each flat cable was connected through a connector, which required a lot of man-hours to align the electrodes. There is. now,
The active element 9 for driving the transparent electrode 2 is attached to the above auxiliary electrode.
is attached using a soldering method or the like to send data signals, and on the other hand, on the glass substrate 1, a wiring that connects to the electrode terminal of the back electrode 3 (not shown in the figure) is formed in advance by a vapor deposition method, and then soldered on top of that. A driving active element 10 is arranged by a mounting method or the like, and a scanning signal is sent to the back electrode 3. In this case, the wiring between the external circuit and the display panel is limited to wiring for power, ground, clock, and data signals for the driving active elements 9 and 10, and the number of wiring is reduced by an order of magnitude compared to the conventional method, and the display panel The number of man-hours required to connect the device to external circuits is reduced, resulting in lower product costs and higher reliability.
(f) 発明の効果
以上の説明から明らかなように、本発明にる透
明電極の両端を短絡する低抵抗の補助電極を表示
パネルの背面に付設すると、接続する表示パネル
の各発光セルの印加パルス信号に対する電圧の立
ち上がり時間を従来の表示パネルの1/4に減少さ
せて信号電圧に対する立ち上がり時間遅れに基づ
く発光セルの輝度のラムの問題を実際上解消する
ことが出来るとともに、表示パネルの背面に接続
する補助電極４を利用して透明電極の駆動用能動
回路素子を配設することで、該表示パネルと外部
駆動回路との接続用配線の本数を大幅に削減して
その接続作業の工数を低減し接続の信頼性を向上
出来るという効果がある。(f) Effect of the invention As is clear from the above explanation, when a low-resistance auxiliary electrode that short-circuits both ends of the transparent electrode according to the present invention is attached to the back of the display panel, the voltage applied to each light-emitting cell of the connected display panel is reduced. By reducing the voltage rise time in response to a pulse signal to 1/4 of that of conventional display panels, it is possible to practically eliminate the problem of luminance ram in light emitting cells due to the delay in the rise time in response to the signal voltage, and also By arranging an active circuit element for driving the transparent electrode using the auxiliary electrode 4 connected to the auxiliary electrode 4, the number of wirings for connecting the display panel to the external driving circuit can be significantly reduced, and the number of man-hours for the connection work can be reduced. This has the effect of reducing the noise and improving the reliability of the connection.
第１図は従来の表示パネルの１個の透明電極の
電気的等価回路、第２図は低抵抗電極を附設した
透明電極の構造を概念的に示す部分斜視図、第３
図は本発明に基づく補助電極を附設した表示パネ
ルの１個の透明電極の電気的等価回路、第４図は
本発明による補助電極を有する表示パネルの構造
を概念的に示す平面図および断面図、第５図は前
記表示パネルの構造を示すさらに詳細な断面図、
第６図は前記補助電極を活用して表示パネル電極
の駆動用能動素子を付設した構造を示す平面図で
ある。
図において、１はガラス基板、２は透明電極、
３は背面電極、４は補助電極、５は表示媒体、
９，１０は表示パネル駆動用能動素子をそれぞれ
示す。
Fig. 1 shows an electrical equivalent circuit of one transparent electrode of a conventional display panel, Fig. 2 is a partial perspective view conceptually showing the structure of a transparent electrode with a low resistance electrode attached, and Fig. 3
The figure shows an electrical equivalent circuit of one transparent electrode of a display panel provided with an auxiliary electrode according to the present invention, and FIG. 4 is a plan view and a cross-sectional view conceptually showing the structure of a display panel having an auxiliary electrode according to the present invention. , FIG. 5 is a more detailed sectional view showing the structure of the display panel,
FIG. 6 is a plan view showing a structure in which active elements for driving display panel electrodes are attached by utilizing the auxiliary electrodes. In the figure, 1 is a glass substrate, 2 is a transparent electrode,
3 is a back electrode, 4 is an auxiliary electrode, 5 is a display medium,
Reference numerals 9 and 10 indicate display panel driving active elements, respectively.
Claims (1)
前面電極と背面電極とを有し、該前面電極を構成
する透明電極と該背面電極との各対向領域で表示
セルを画定してなる表示パネルにおいて、前記各
背面電極の表示媒体側とは反対側の電極表面に絶
縁層を形成し、該絶縁層上に金属材料の配線層よ
り成る複数の補助電極を配設するとともに、該補
助電極の両端を対応する前記複数の前面電極の両
端に接続したことを特徴とする表示パネル。1. In a display panel comprising a plurality of front electrodes and back electrodes arranged opposite to each other on both sides of a display medium, and display cells are defined by respective opposing regions of transparent electrodes constituting the front electrodes and the back electrodes. , an insulating layer is formed on the surface of the electrode on the side opposite to the display medium side of each of the back electrodes, a plurality of auxiliary electrodes made of wiring layers of a metal material are provided on the insulating layer, and both ends of the auxiliary electrodes are provided. are connected to both ends of the plurality of corresponding front electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57190256A JPS5978384A (en) | 1982-10-28 | 1982-10-28 | Display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57190256A JPS5978384A (en) | 1982-10-28 | 1982-10-28 | Display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978384A JPS5978384A (en) | 1984-05-07 |
| JPH049313B2 true JPH049313B2 (en) | 1992-02-19 |
Family
ID=16255106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57190256A Granted JPS5978384A (en) | 1982-10-28 | 1982-10-28 | Display panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978384A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033587A (en) * | 1983-08-04 | 1985-02-20 | 松下電器産業株式会社 | Solid video display panel and manufacture thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5387250A (en) * | 1977-01-11 | 1978-08-01 | Toshiba Corp | Matrix type liquid crystal display panel |
-
1982
- 1982-10-28 JP JP57190256A patent/JPS5978384A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5387250A (en) * | 1977-01-11 | 1978-08-01 | Toshiba Corp | Matrix type liquid crystal display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5978384A (en) | 1984-05-07 |
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