JPS6088998A - Driving of thin film acel display panel - Google Patents
Driving of thin film acel display panelInfo
- Publication number
- JPS6088998A JPS6088998A JP19622183A JP19622183A JPS6088998A JP S6088998 A JPS6088998 A JP S6088998A JP 19622183 A JP19622183 A JP 19622183A JP 19622183 A JP19622183 A JP 19622183A JP S6088998 A JPS6088998 A JP S6088998A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- display panel
- driving
- acel
- scanning
- 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
Links
- 239000010409 thin film Substances 0.000 title claims description 6
- 238000000034 method Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 4
- 230000010287 polarization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（技部１公野）
本発明は薄膜ＡＣＥＬパネルの発光輝度の均一性を向上
させる駆動方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Department 1 Kono) The present invention relates to a driving method for improving the uniformity of light emission brightness of a thin film ACEL panel.
（背景技術） 第１図に２重絶縁薄膜ＥＬ素子の構造図を示す。(Background technology) FIG. 1 shows a structural diagram of a double insulating thin film EL device.
本素子はガラス基板ｌ上に透明電極２（ＩＴＯ）を横方
向に設けてＹ２Ｏ３，５ｉ０２等の誘電体層３゜５でＺ
ｎＳの発光層４をサンドイッチし、誘電体層５の」二に
ＡＩ金金属背面電極６を縦方向に配設した構造になって
いる。このようなＥＬ素子の発光メカニズムは一般にＥ
Ｌ素子の両電極２，６間に発光量値以上の外部電圧を印
加すると発光層４が電子なだれ現象を起こして発光しそ
の結果発光層４内に外部電圧を相殺する方向に分極′電
圧が発生する。この分極電圧のために次の発光のための
外部電圧は、１ｔ■曲の方向とは反対に印加する。この
結果分極゛電圧と外部電圧との重畳効果により発光力１
１度は上る。この特性を利用してＥＬ末子の両電極間に
交番電圧を印加する駆動方法の従来の実施例を説明する
。第２図に従来の駆動力法のタイムチャートを示す。Ｔ
は駆動周期、Ｔ４）ｉ （ｉ ＝ Ｉ〜ｎ）は交番周期
内のＰＷｉ （ｉ ＝ ｌ 〜ｎ ）とＰＲＩ （７）
位相時間、 ＰＷｉ とＰＲの駆動パルス幅は任意とす
る。In this device, a transparent electrode 2 (ITO) is provided horizontally on a glass substrate l, and a dielectric layer such as Y2O3, 5i02, etc.
It has a structure in which an nS light emitting layer 4 is sandwiched, and an AI gold metal back electrode 6 is vertically disposed on the second side of the dielectric layer 5. The light emitting mechanism of such EL devices is generally E
When an external voltage greater than the luminescence amount value is applied between the electrodes 2 and 6 of the L element, the luminescent layer 4 causes an electron avalanche phenomenon and emits light, resulting in a polarization voltage within the luminescent layer 4 in a direction that cancels out the external voltage. Occur. Due to this polarization voltage, the external voltage for the next light emission is applied in the opposite direction to the direction of the 1t curve. As a result, the luminous power is 1 due to the superimposed effect of the polarization voltage and the external voltage.
It goes up at least once. A conventional example of a driving method that utilizes this characteristic to apply an alternating voltage between both electrodes of the EL terminal will be described. FIG. 2 shows a time chart of the conventional driving force method. T
is the driving period, T4) i (i = I ~ n) is the PWi (i = l ~ n) and PRI (7) within the alternating period
The phase time, PWi and PR drive pulse width are arbitrary.
ＰＷｉを書き込み駆動電圧、ＰＲをイフレッシュ駆動電
圧とする。今、表示パネルのマトリクス構成をデータラ
イン側Ｍ行、走査ライン側Ｎ列とする各走査ラインの駆
動周期Ｔは同一とする走査は線順次走査とし、各走査ラ
イン５ｃａｎ １．５ｃａｎ２、５ｃａｎ ｎの順で表
示データの有無により書き込み駆動電圧ＰＷｉを変調さ
せて動作させ、最後の走査ラインの書き込み駆動電圧Ｐ
Ｗｎを印加後１表示パネルの全ＥＬ素子に対し同時に書
き込み駆動電圧ＰＷｉ とは逆極性のリフレッシュ駆動
電圧ＰＲを印加して発光させていた。ここで書き込み駆
動型／ｌＩ’ＥＰＷｉ とリフレッシュ駆動電圧ＰＲの
間隙Ｔ七１ と発光輝度との関係を調べてみる。Let PWi be a write drive voltage and PR be a refresh drive voltage. Now, the matrix configuration of the display panel is M rows on the data line side and N columns on the scan line side.The drive period T of each scan line is the same.Scanning is line sequential scanning, and each scan line is 5can 1.5can2, 5can n. The operation is performed by modulating the write drive voltage PWi depending on the presence or absence of display data, and the write drive voltage P of the last scan line is
After applying Wn, a refresh drive voltage PR having a polarity opposite to the write drive voltage PWi was simultaneously applied to all EL elements of one display panel to cause them to emit light. Let us now examine the relationship between the write drive type /lI'EPWi and the refresh drive voltage PR, T71, and the luminance.
第３１２（ａ）に１走査ラインの駆動タイムチャートを
ノＪ（す。The driving time chart for one scanning line is shown in 312(a).
ＴＷＩ ＝ ＴＷ２は両電極への電圧印加時間、Ｖａは
印加電圧の振幅。第３図（ｂ）に駆動周期Ｔ内における
Ｅｌ、末子の各駆動条件をＳＴＩ、 Ｓｉ２． Ｓｒ１
の３状態で示す。TWI = TW2 is the voltage application time to both electrodes, Va is the amplitude of the applied voltage. FIG. 3(b) shows the driving conditions of El and the youngest child within the driving period T for STI, Si2. Sr1
It is shown in three states.
ＳＴＩは背面電極（＾ｌ）側により電圧Ｖａを印加して
いる時間。Ｓｉ２は両電極を放電させる時間。STI is the time during which voltage Va is applied from the back electrode (^l) side. Si2 is the time to discharge both electrodes.
Ｓｒ１は透明電極（ＩＴｏ ）側より電圧Ｖａを印加し
ている時間。今駆動条件をＴ ＝ ２０ｍ５． ＴＷＩ
−ＴＷ２＝５０終ｓ、Ｖａ・３００Ｖと設定し書き込
み駆動電圧四とリフレッシュ駆動電圧ＰＲとの間隙部を
駆動周期Ｔ内でＵ（変させたときの間隙Ｔｏと発光輝度
との関係を第５図（ａ）、 （ｂ）に示す、第５図（ａ
）。Sr1 is the time during which voltage Va is applied from the transparent electrode (ITo) side. Now the driving conditions are T = 20m5. TWI
- TW2 = 50 end s, Va 300 V is set, and the relationship between the gap To and the luminance when the gap between the write drive voltage 4 and the refresh drive voltage PR is changed by U (within the drive cycle T) is Figure 5 (a) shown in Figures (a) and (b).
).
（ｂ）共に実測値である。第４図にＴＥ） ＝ ５０川
Ｓ。(b) Both are actually measured values. TE in Figure 4) = 50 river S.
Ｔ（） ＝ １０ｍ５時の発光波形を示す０発光波形Ｂ
ｌは、１；き込み駆動電圧Ｐｗ印加時の発光輝度、Ｂ２
はリフレ・〉シュ駆動゛毛圧ＰＲ印加時の発光輝度であ
る。T() = 0 emission waveform B showing the emission waveform at 10m5
l is 1; luminescence brightness when applying drive voltage Pw, B2
is the light emission brightness when the reflex drive drive (hair pressure PR) is applied.
第４図（ａ）はＴ（） ｍ １０ ｓｒｓ時の駆動タイ
ムチャート、
第４図（ｂ）はＴ（＋・１０ ＋ｍｓ時の発光波形、第
４図（ｃ）はＴ９１＝５０ＪＬＳ時の１動タイムチヤー
ト。Fig. 4(a) is a drive time chart at T() m 10 srs, Fig. 4(b) is a light emission waveform at T(+・10 +ms), and Fig. 4(c) is a driving time chart at T() m 10 srs. Dynamic time chart.
第４図（ｄ）はＴつ一５Ｑ＃Ｌｓ時の発光波形である。FIG. 4(d) shows the light emission waveform when T is 5Q#Ls.
第５図（ａ）の相対輝度値Ｂは交番位相時間Ｔ［Ｆ］内
の発光量としＢ ＝ Ｂｌ ＋ ８２で表わしている。The relative brightness value B in FIG. 5(a) is the amount of light emitted within the alternating phase time T[F] and is expressed as B=Bl+82.
Ｂ＝１の交番位相時間はＴＥ） −５０ｐｓである。第
５図（ｂ）は各交番位相時間Ｔ９における書き込み駆動
電圧ｐｗとリフレッシュ駆動電圧ＰＲ印加時の各々の発
光輝度を示しである。第５図（ａ）の実測（ｔｒｉより
書き込み駆動電圧ｐｗとリフレッシュ駆動電圧ＰＲの位
相関係がＴＱ ＝：Ｔ／２周辺で発光輝度が低下し逆に
両駆動電圧Ｐ１１とＰＲの位相関係が近つくに従い発光
輝度が増加する。第５図（Ｃ）は交番印加電圧Ｖａを２
６０ｖ〜３２０Ｖまで可変したときのＴｐ ＝ ５０ｐ
、ｓ、 ＴＥ） １＝１０ ｍｓ時の相対輝度値を示す
。この実測値からマトリクス構成の表示パネルを駆動す
る際、書き込み駆動電圧ＰＷｉ とリフレッシュ駆動電
圧ＰＲとの間隙ＴＢｉが変化すると発光輝度が変化する
ため表示パネルにおける発光輝度の均−性劣る欠点があ
った。The alternating phase time for B=1 is TE) -50 ps. FIG. 5(b) shows the respective light emission brightnesses when the write drive voltage pw and the refresh drive voltage PR are applied at each alternating phase time T9. The actual measurement in FIG. 5(a) (tri) shows that the phase relationship between the write drive voltage pw and the refresh drive voltage PR is TQ=:T/2, and the luminance decreases around TQ. The luminance increases as the voltage increases.Figure 5 (C) shows that when the alternating applied voltage Va is
Tp = 50p when variable from 60v to 320V
, s, TE) indicates the relative brightness value at 1=10 ms. When driving a display panel with a matrix configuration based on this actual measurement value, the emission brightness changes when the gap TBi between the write drive voltage PWi and the refresh drive voltage PR changes, so there was a drawback that the uniformity of the emission brightness in the display panel was poor. .
（発明の課題）
本発明はＡＣＥＬ表示パネルを線順次駆動する際各走査
ライン毎に交番電圧を印加することにより発光輝度の均
一性を向上させうる駆動方法について以下に詳細に説明
する。(Problem of the Invention) The present invention will explain in detail below a driving method that can improve the uniformity of luminance by applying an alternating voltage to each scanning line when driving an ACEL display panel line-sequentially.
（発明の構成および作用）
第６図に本発明の新規駆動方法のタイムチャートを示す
。(Structure and operation of the invention) FIG. 6 shows a time chart of the novel driving method of the invention.
Ｔは駆動周期、Ｔ＠１（ｉ−１〜ｎ）は交番周期内のＰ
Ｗｉ（ｉｇｌ 〜ｎ）とＰＲｉ （ｉ ＝ Ｉ〜ｎ ）
の位相時間、ＰＷｉ 、：ＰＲｉの駆動パルス幅は任意
である。ＰＷｉを書き込み駆動電圧、ＰＲｉをリフレ・
ンシュ駆動電圧とする。T is the driving period, T@1 (i-1 to n) is P within the alternating period
Wi (igl~n) and PRi (i = I~n)
The phase time of PWi and the drive pulse width of :PRi are arbitrary. PWi is the write drive voltage, PRi is the reflex voltage.
drive voltage.
台表示パネルのマトリクス構成をデータライン側Ｍ行、
走査ライン側Ｎ列とする。各走査ラインの駆動周期Ｔは
同一とする。走査は線順次走査とし、最初の走査ライン
５ｃａｎ Ｉの表示データのイ１無により古き込み駆動
電圧ＰＷＩを変調させて表示パネルに印加後、速やかに
書き込み駆動電圧ＰＷＩとは、逆極性のリフレッシュ駆
動°ｉ［圧ＰＲＩを間隙Ｔ、１後当該走査ラインに印加
して発光させる。同様の走査をＮライン動作させｌフレ
ームの動作が終了する。ｌフレーム動作中の各走査ライ
ンの書き込み駆動電圧ＰＷｉ と、リフレッシュ駆動電
圧ＰＲｉの間隙ＴＢｉを同時間にすることにより第５図
（ａ、）から明らかのように発光輝度の均一性が向」−
する。又間隙Ｔ１の時間が早ければ発光輝度も増加する
利点かある。第７図に１実施例として駆動回路のブロッ
ク図を示す。The matrix configuration of the display panel is M rows on the data line side.
There are N columns on the scanning line side. The driving period T of each scanning line is the same. Scanning is line-sequential scanning, and after modulating the old drive voltage PWI depending on the display data of the first scan line 5can I and applying it to the display panel, a refresh drive with a polarity opposite to that of the write drive voltage PWI is immediately applied. °i[Pressure PRI is applied to the scanning line after a gap T and 1 to emit light. Similar scanning is performed for N lines, and the operation for one frame is completed. By making the gap TBi between the write drive voltage PWi and the refresh drive voltage PRi of each scanning line during one frame operation equal to each other, the uniformity of the light emission brightness is improved as is clear from FIG. 5(a).
do. Furthermore, if the time of the gap T1 is short, there is an advantage that the luminance of light emission increases. FIG. 7 shows a block diagram of a driving circuit as one embodiment.
ＥＬパネル７はデータ側Ｍ行、走査側Ｎ列のマトリクス
配列されたＥＬ素子群で構成され、各素子群はデータ側
駆動回路８、走査側駆動回路９のスイッチング素ｆ−と
結線されている。データ側駆動回路８はｌラインメモリ
としてのシフトレジスタｌＯと結線されている。制御回
路１１は水平、垂直周期信号１表示データ、転送りロッ
ク、走査ライン選択信号等を発生させている。本構成で
第６図でノ」＼した本発明の駆動方法を制御している。The EL panel 7 is composed of a group of EL elements arranged in a matrix of M rows on the data side and N columns on the scanning side, and each element group is connected to the switching element f- of the data side drive circuit 8 and the scanning side drive circuit 9. . The data side drive circuit 8 is connected to a shift register IO serving as an 1-line memory. The control circuit 11 generates horizontal and vertical periodic signals, one display data, a transfer lock, a scanning line selection signal, and the like. With this configuration, the driving method of the present invention shown in FIG. 6 is controlled.
（発明の効果 ）
本発明はＡＣＥＬ表示パネルを線順次走査し、各走査ラ
イン毎に交番電圧を印加する際、交番電圧の４：を相時
間を可変することにより発光輝度を変調できる利点かあ
る。(Effects of the Invention) The present invention has the advantage that when the ACEL display panel is scanned line-sequentially and an alternating voltage is applied to each scanning line, the luminance can be modulated by varying the phase time of the alternating voltage. .
第１図は２重絶縁薄膜ＥＬ素子の構成図、第２図は従来
のＡＣＥＬ素子の駆動タイムチャートを示す図、第３図
（ａ）は交番電圧タイムチャートをンバす図、第３図（
ｂ）はＡＣ：ＥＬ素子の各駆動過程における状ｆｍ Ｉ
Δ、第４図（ａ）〜（ｄ）は各駆動条件下の発光波形を
示す図、第５図（ａ）及び（ｂ）は交番位相時間と相対
＃度値を示す図、第５図（ｉ）は印加電圧と相対輝度値
を示す図、第６図は本発明のＡＣＥＬ素子の駆動タイム
チャー１・を示す図、第７図は本発明による駆動回路の
ブロック図である。
ｌ、カラス基板、２；背面電極、３，５； 誘電体層、
４；発光層、６；透明電極。
牛５．：１出願人
沖電気工業株式会社
特工１出願代理人
３を理十 山木恵−
第７図
０
］１ ９
手続補正書（方式）
％式％
１、事件の表示
昭和５８年特許 願第１９６２２１号
２、発明の名称
薄膜Ａ ＣＥ Ｔ、表示パネルの駆動方法３、補正をす
る者
事件との関係 特許出願人
名 称 （０２９）沖電気工業株式会社６補正の対象
明細書の図面の簡単な説明の欄
７、補正の内容Figure 1 is a block diagram of a double insulated thin film EL element, Figure 2 is a diagram showing a drive time chart of a conventional ACEL element, Figure 3 (a) is a diagram showing an alternating voltage time chart, and Figure 3 (a) is a diagram showing a drive time chart of a conventional ACEL element.
b) is the state fm I in each driving process of the AC:EL element
Δ, Figures 4 (a) to (d) are diagrams showing the emission waveform under each driving condition, Figures 5 (a) and (b) are diagrams showing the alternating phase time and relative # degree value, Figure 5 (i) is a diagram showing applied voltage and relative luminance value, FIG. 6 is a diagram showing a driving time chart 1 of the ACEL element of the present invention, and FIG. 7 is a block diagram of a driving circuit according to the present invention. l, glass substrate, 2; back electrode, 3, 5; dielectric layer,
4; light emitting layer; 6; transparent electrode. Cow 5. : 1 Applicant: Oki Electric Industry Co., Ltd. Tokuko 1 Application agent: 3 Megumi Yamaki - Figure 7 0 ] 1 9 Procedural amendment (method) % formula % 1. Indication of the case 1988 Patent Application No. 196221 2. Name of the invention Thin film ACE T, display panel driving method 3. Relationship with the amended case Patent applicant name (029) Oki Electric Industry Co., Ltd. 6. Brief description of the drawings of the specification subject to the amendment Column 7, Contents of amendment
Claims (1)
示パネルの前記２つの誘電体層の各々の表面にあって！
Ｌいに交叉する多数の電極群の交点を表示素子とし前記
誘電体層の１つの゛電極群をデータ電極とし、他の電極
群を走査電極とし各駆動周期（Ｔ）の始めにデータ電極
側から発光しきい値以上の電圧（ＰＷｉ ）を素子に印
加し、次に走査電極側から発光しきい値以上の逆極性の
電圧（ＰＲｉ ）を素子に印加しｌ走査毎に素子へ交番
電圧を印加することを繰り返して表示パネル全体を走査
することを特徴とする薄膜ＡＣＥＬ表示パネルの駆動力
法。On each surface of the two dielectric layers of an EL display panel having a three-layer structure in which both sides of the light-emitting layer are covered with dielectric layers!
The intersection point of a large number of electrode groups intersecting in a L direction is used as a display element, one electrode group of the dielectric layer is used as a data electrode, the other electrode group is used as a scanning electrode, and at the beginning of each drive period (T), the data electrode side is A voltage (PWi) above the emission threshold is applied to the element from the scanning electrode side, and then a voltage (PRi) of opposite polarity above the emission threshold is applied to the element from the scanning electrode side, and an alternating voltage is applied to the element every l scan. A driving force method for a thin-film ACEL display panel, which is characterized in that application is repeated to scan the entire display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19622183A JPS6088998A (en) | 1983-10-21 | 1983-10-21 | Driving of thin film acel display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19622183A JPS6088998A (en) | 1983-10-21 | 1983-10-21 | Driving of thin film acel display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088998A true JPS6088998A (en) | 1985-05-18 |
| JPH0426116B2 JPH0426116B2 (en) | 1992-05-06 |
Family
ID=16354211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19622183A Granted JPS6088998A (en) | 1983-10-21 | 1983-10-21 | Driving of thin film acel display panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088998A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188589A (en) * | 1985-02-18 | 1986-08-22 | 松下電器産業株式会社 | Driver for el display panel |
| JPS6431197A (en) * | 1987-07-27 | 1989-02-01 | Sharp Kk | Driving system for display device |
| JPH047592A (en) * | 1990-04-25 | 1992-01-10 | Sharp Corp | Driving method of display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101916041B1 (en) * | 2012-12-12 | 2018-11-07 | 현대자동차 주식회사 | Rotor of wound rotor synchronous motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146587A (en) * | 1976-05-31 | 1977-12-06 | Sharp Corp | Driving system of thin film el display device |
-
1983
- 1983-10-21 JP JP19622183A patent/JPS6088998A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146587A (en) * | 1976-05-31 | 1977-12-06 | Sharp Corp | Driving system of thin film el display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188589A (en) * | 1985-02-18 | 1986-08-22 | 松下電器産業株式会社 | Driver for el display panel |
| JPS6431197A (en) * | 1987-07-27 | 1989-02-01 | Sharp Kk | Driving system for display device |
| JPH047592A (en) * | 1990-04-25 | 1992-01-10 | Sharp Corp | Driving method of display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0426116B2 (en) | 1992-05-06 |
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