JPH0426116B2 - - Google Patents
Info
- Publication number
- JPH0426116B2 JPH0426116B2 JP58196221A JP19622183A JPH0426116B2 JP H0426116 B2 JPH0426116 B2 JP H0426116B2 JP 58196221 A JP58196221 A JP 58196221A JP 19622183 A JP19622183 A JP 19622183A JP H0426116 B2 JPH0426116 B2 JP H0426116B2
- Authority
- JP
- Japan
- Prior art keywords
- drive voltage
- voltage
- scanning
- line
- electrode
- 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
- 238000000034 method Methods 0.000 claims description 11
- 239000010409 thin film Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 208000032005 Spinocerebellar ataxia with axonal neuropathy type 2 Diseases 0.000 description 2
- 208000033361 autosomal recessive with axonal neuropathy 2 spinocerebellar ataxia Diseases 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229930192419 itoside Natural products 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は交流駆動型薄膜ELパネル（以下、薄
膜ACELパネルと称す）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 Field) The present invention relates to a driving method for improving the uniformity of luminance of an AC driven thin film EL panel (hereinafter referred to as 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) Figure 1 shows a structural diagram of a double-insulated thin film EL device.
本素子はガラス基板１上に透明電極２ITOを横
方向に設けてY2O3，SiO2等の誘電体層３，５で
ZnSの発光層４をサンドイツチし、誘電体層５の
上にAl金属の背面電極６を縦方向に配設した構
造になつている。このようなEL素子の発光メカ
ニズムは一般にEL素子の両電極２，６間に発光
閾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、直前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輝
度は上る。この特性を利用してEL素子の両電極
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図に従来の駆動方法のタイムチ
ヤートを示す。Ｔは駆動周期、TDｉ（ｉ＝１〜
ｎ）は交番周期内のPWi（ｉ＝１〜ｎ）とPRの位
相時間、PWiとPRの駆動パルス幅は任意とする。 In this device, transparent electrodes 2ITO are provided horizontally on a glass substrate 1, and dielectric layers 3 and 5 made of Y 2 O 3 , SiO 2, etc.
It has a structure in which a light emitting layer 4 of ZnS is sandwiched, and a back electrode 6 of Al metal is vertically arranged on a dielectric layer 5. Generally, the light emitting mechanism of such an EL element is that when an external voltage higher than the emission threshold is applied between the electrodes 2 and 6 of the EL element, the light emitting layer 4 causes an electron avalanche phenomenon to emit light, and as a result, the external voltage is applied inside the light emitting layer 4. A polarization voltage is generated in the direction that cancels out the . Due to this polarization voltage, the external voltage for the next light emission is applied in the opposite direction to the previous one. As a result, the luminance increases due to the superimposed effect of the polarization voltage and the external voltage. A conventional example of a driving method that utilizes this characteristic to apply an alternating voltage between both electrodes of an EL element will be described. FIG. 2 shows a time chart of the conventional driving method. T is the drive period, T D i (i=1~
n) is the phase time of PWi (i=1 to n) and PR within the alternating cycle, and the drive pulse widths of PWi and PR are arbitrary.
PWiを書き込み駆動電圧、PRをリフリツシユ
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Scan１，
Scan２，Scan ｎの順で表示データの有無により
書き込み駆動電圧PWiを変調させて印加し、最後
の走査ラインの書き込み駆動電圧PWnを印加後、
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ツシユ駆動電圧
PRを印加して発光させていた。ここで書き込み
駆動電圧PWiとリフレツシユ駆動電圧PRの交番
位相時間TDiと発光輝度との関係を調べてみる。 Let PWi be the write drive voltage and PR be the reflash drive voltage. Now, assume that the matrix configuration of the display panel is M rows on the data line side and N columns on the scanning line side. The driving period T of each scanning line is the same. Scanning is line sequential scanning, and each scanning line Scan1,
The write drive voltage PWi is modulated and applied depending on the presence or absence of display data in the order of Scan 2 and Scan n, and after applying the write drive voltage PWn of the last scan line,
A refresh drive voltage with the opposite polarity to the write drive voltage PWi simultaneously applies to all EL elements of the display panel.
PR was applied to emit light. Let us now examine the relationship between the alternating phase time T Di of the write drive voltage PWi and the refresh drive voltage PR and the luminance.
第３図ａに１走査ラインの駆動タイムチヤート
を示す。 FIG. 3a shows a driving time chart for one scanning line.
TW１＝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素子の各駆動条件をST１，ST２，
ST３の３状態で示す。 TW1=TW2 is the voltage application time to both electrodes,
Va is the amplitude of the applied voltage. Figure 3b shows the driving conditions of the EL element within the driving period T: ST1, ST2,
It is shown in three states of ST3.
ST１は透明電極ITO側を正極性として透明電
極ITOと背面電極Ａ１との間に電圧Vaを印加し
ている状態、ST２は両電極間を短絡し放電させ
ている状態、ST３は背面電極Ａ１を正極性とし
て両電極間に電圧Vaを印加している状態をそれ
ぞれ示している。今駆動条件をＴ＝20ms，TW
１＝TW２＝50μs，Va＝300Vと設定し書き込み
駆動電圧PWとリフレツシユ駆動電圧PRとの交
番位相時間TDを駆動周期Ｔ内で可変させたとき
の交番位相時間TDと発光輝度との関係を第５図
ａ，ｂに示す。第５図ａ，ｂ共に実測値である。
第４図にTD＝50μs，TD＝10ms時の発光波形を示
す。発光波形Ｂ１は書き込み駆動電圧PW印加時
の発光輝度、Ｂ２はリフレツシユ駆動電圧PR印
加時の発光輝度である。 ST1 is a state in which the transparent electrode ITO side is set as positive polarity and a voltage Va is applied between the transparent electrode ITO and the back electrode A1, ST2 is a state in which both electrodes are short-circuited and discharged, and ST3 is a state in which the back electrode A1 is A state in which a voltage Va is applied between both electrodes as positive polarity is shown in each case. Now the driving conditions are T=20ms, TW
Relationship between alternating phase time T D and luminance when alternating phase time T D between write drive voltage PW and refresh drive voltage PR is set as 1=TW2=50μs, Va=300V and is varied within drive period T. are shown in Figures 5a and b. Both figures a and b are actually measured values.
Figure 4 shows the emission waveform when T D =50 μs and T D =10 ms. The light emission waveform B1 is the light emission brightness when the write drive voltage PW is applied, and the light emission waveform B2 is the light emission brightness when the refresh drive voltage PR is applied.
第４図ａはTD＝10ms時の駆動タイムチヤー
ト、
第４図ｂはTD＝10ms時の発光波形、
第４図ｃはTD＝50μs時の駆動タイムチヤート、
第４図ｄはTD＝50μs時の発光波形である。 Figure 4a is the driving time chart when T D = 10ms, Figure 4b is the emission waveform when T D = 10ms, Figure 4c is the driving time chart when T D = 50μs, and Figure 4d is T This is the emission waveform when D = 50 μs.
第５図ａの相対輝度値Ｂは交番位相時間TD内
の発光量としＢ＝Ｂ１＋Ｂ２で表わしている。Ｂ
＝１の交番位相時間TD＝50μsである。第５図ｂ
は各交番位相時間TDにおける書き込み駆動電圧
PWとリフレツシユ駆動電圧PR印加時の各々の
発光輝度を示してある。第５図ａの実測値より書
き込み駆動電圧PWとリフレツシユ駆動電圧PR
の位相関係からTD≒Ｔ／２周辺で発光輝度が低
下し逆に両駆動電圧PWとPRの位相関係が近づ
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260V〜320Vまで可変したときのTD
＝50μs，TD＝10ms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とリフレツシユ駆動
電圧PRとの交番位相時間TDｉ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
の均一性が劣る欠点があつた。 The relative brightness value B in FIG. 5a is the amount of light emitted within the alternating phase time T D and is expressed as B=B1+B2. B
=1 alternating phase time T D =50 μs. Figure 5b
is the write drive voltage at each alternating phase time T D
The light emission brightness when PW and refresh drive voltage PR are applied are shown. From the measured values in Figure 5a, write drive voltage PW and refresh drive voltage PR
Due to the phase relationship, the emission brightness decreases around T D ≈T/2, and conversely, as the phase relationship between both drive voltages PW and PR approaches, the emission brightness increases. Figure 5c shows T D when the alternating applied voltage Va is varied from 260V to 320V.
Relative brightness values are shown when = 50 μs and T D = 10 ms. Based on this actual measurement value, when driving a display panel with a matrix configuration, if the alternating phase time T D i between the write drive voltage PWi and the refresh drive voltage PR changes, the luminance will change, so the uniformity of the luminance in the display panel will be poor. There were flaws.
（発明の概要）
この発明の交流駆動型薄膜EL表示パネルの駆
動方法は、
発光層の両主面を誘電体層で被覆したEL表示
パネルの前記２つの誘電体層の各々の表面にあつ
て互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、前記走査電極に
沿つた各走査ラインを線順次走査で駆動を行うも
のであつて、
各走査ラインの駆動周期の始めに表示データの
有無に応じて変調させた駆動電圧PWiを当該走査
ラインの各表示素子に印加し、当該書き込み駆動
電圧の印加終了後所定の時間TDｉ経過した後、
前記書き込み駆動電圧とは逆極性を有するリフレ
ツシユ駆動電圧PRiを前記各表示素子に印加する
ことにより前記各表示素子への交番電圧の印加動
作を行い、且つ各走査ラインにおける前記書き込
み駆動電圧の印加開始から前記リフレツシユ駆動
電圧の印加終了までの前記交番電圧印加時間が各
走査ライン間で時間的に重ならないようにして、
各走査ライン毎に前記交番電圧印加動作を順次繰
り返し、表示パネル全体を走査駆動することを特
徴とするものである。(Summary of the Invention) A method for driving an AC-driven thin-film EL display panel of the present invention provides a method for driving an AC-driven thin-film EL display panel, in which both principal surfaces of a light-emitting layer are coated with dielectric layers on each surface of the two dielectric layers. The intersection of a large number of mutually intersecting electrode groups 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 scan electrode, and each scan line along the scan electrode is scanned line-sequentially. At the beginning of the drive cycle of each scan line, a drive voltage PWi modulated depending on the presence or absence of display data is applied to each display element of the scan line, and after the application of the write drive voltage is finished. After the predetermined time T D i has elapsed,
Applying a refresh drive voltage PRi having a polarity opposite to that of the write drive voltage to each display element to apply an alternating voltage to each display element, and start applying the write drive voltage in each scan line. so that the alternating voltage application time from to the end of application of the refresh drive voltage does not overlap in time between each scanning line,
The present invention is characterized in that the alternating voltage application operation is sequentially repeated for each scanning line to scan and drive the entire display panel.
この発明は、前記のように構成されているの
で、前記駆動電圧と、リフレツシユ駆動電圧との
間の前記時間TDｉを各走査ラインについて同一
のものにすることができ、このような条件では画
面全体にわたつて均一な輝度の表示効果が達成さ
れる。前記輝度は前記時間TDｉを適当に設定す
ることにより、選択することができる。 Since the present invention is configured as described above, the time T D i between the drive voltage and the refresh drive voltage can be made the same for each scanning line, and under such conditions, A uniform brightness display effect is achieved over the entire screen. The brightness can be selected by appropriately setting the time T D i.
（実施例）
第６図に本発明の新規駆動方法のタイムチヤー
トを示す。(Example) FIG. 6 shows a time chart of the novel driving method of the present invention.
Ｔは駆動周期、TDｉ（ｉ＝１〜ｎ）は交番周期
内のPWi（ｉ＝１〜ｎ）とPRi（ｉ＝１〜ｎ）の位
相時間、PWiと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をリフレツシ
ユ駆動電圧とする。 T is the driving period, T D i (i = 1 to n) is the phase time of PWi (i = 1 to n) and PRi (i = 1 to n) within the alternating period, and the driving pulse width of PWi and PRi is arbitrary. It is. Let PWi be the write drive voltage and PRi be the refresh drive voltage.
表示パネルは、その電極をデータライン側Ｍ
行、走査ライン側Ｎ列のマトリツクス構成とし、
各データラインと各走査ラインとの交叉する位置
にEL表示素子を備えている。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Scan１の表示データの有無に
より書き込み駆動電圧PW１を変調させて当該走
査ラインの各表示素子に印加後、速やかに書き込
み駆動電圧PW１とは、逆極性のリフレツシユ駆
動電圧PR１を交番位相時間TD１後当該走査ライ
ンの各表示素子に印加して発光させる。最初の走
査ラインScan１に対するリフレツシユ駆動電圧
PR１の印加終了後、直ちに次の走査ラインScan
２に対する走査駆動を前述の走査ラインScan１
に対する走査駆動と同様にして行う。以後、同様
の走査駆動を線順次に各走査ラインに対して行
い、最終の走査ラインScan Ｎに対する走査駆動
が終了することにより１フレームの走査駆動が終
了する。１フレーム走査駆動中の各走査ラインの
書き込み駆動電圧PWiと、リフレツシユ駆動電圧
PRiの交番位相時間TDｉ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
が向上する。交番位相時間TDｉを短くすれば発
光輝度も増加する利点がある。第７図に１実施例
として駆動回路のブロツク図を示す。 The display panel has its electrodes on the data line side M
It has a matrix configuration of rows and N columns on the scanning line side,
An EL display element is provided at the intersection of each data line and each scan line. The driving period T of each scanning line is the same. The scanning is line sequential scanning,
After modulating the write drive voltage PW1 depending on the presence or absence of display data of the first scan line Scan1 and applying it to each display element of the scan line, the refresh drive voltage PR1 with the opposite polarity to the write drive voltage PW1 is immediately applied for an alternating phase time. After T D 1, a voltage is applied to each display element of the scanning line to cause it to emit light. Refresh drive voltage for first scan line Scan1
Immediately scan the next scan line after applying PR1.
The scan drive for Scan 2 is performed using the above-mentioned scan line Scan1.
This is done in the same way as the scanning drive for. Thereafter, similar scanning driving is performed line-sequentially for each scanning line, and when the scanning driving for the final scanning line Scan N is completed, the scanning driving for one frame is completed. Write drive voltage PWi and refresh drive voltage of each scan line during one frame scan drive
By setting the alternating phase times T D i of PRi to be the same time, the uniformity of the light emission brightness is improved as is clear from FIG. 5a. Shortening the alternating phase time T D i has the advantage of increasing luminance. 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及び走査側駆動回路９
のスイツチング素子と結線されている。データ側
駆動回路８は１ラインメモリとしてのシフトレジ
スタ１０と結線されている。制御回路１１は水
平、垂直周期信号、表示データ、転送クロツク、
走査ライン選択信号等を発生させている。本構成
で第６図で示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 a data side drive circuit 8 and a scanning side drive circuit 9.
is connected to the switching element. The data side drive circuit 8 is connected to a shift register 10 serving as a one-line memory. The control circuit 11 receives horizontal and vertical periodic signals, display data, transfer clocks,
It generates scanning line selection signals and the like. This configuration controls the driving method of the present invention shown in FIG.
（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、各走査ラ
インに印加される交番電圧の交番位相時間TDｉ
を同一の一定時間とすることにより発光輝度の均
一化を図ることができると共に、またこの交番位
相時間TDｉの時間長を変更することにより発光
輝度を制御することができる。(Effects of the Invention) The present invention scans an ACEL display panel line-sequentially and applies an alternating voltage to each scanning line, and the alternating phase time T D i of the alternating voltage applied to each scanning line.
By setting these to the same fixed time, it is possible to make the light emission brightness uniform, and by changing the time length of this alternating phase time T D i , it is possible to control the light emission brightness.
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ヤートを示
す図、第３図ａは交番電圧タイムチヤートを示す
図、第３図ｂはACEL素子の各駆動過程における
状態図、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
輝度値を示す図、第５図ｃ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
タイムチヤートを示す図、第７図は本発明による
駆動回路のブロツク図である。
１……ガラス基板、２……透明電極、３，５…
…誘電体層、４……発光層、６……背面電極。
Figure 1 is a configuration diagram of a double-insulated thin film EL element, Figure 2
The figure shows a driving time chart of a conventional ACEL element, Fig. 3a shows an alternating voltage time chart, Fig. 3b shows a state diagram of each drive process of the ACEL element, and Figs. 4a to d show each driving process. Figures 5a and 5b are diagrams showing the emission waveform under driving conditions, Figures 5a and 5b are diagrams showing alternating phase times and relative brightness values, Figure 5c is a diagram showing applied voltages and relative brightness values, and Figure 6 is a diagram showing the applied voltage and relative brightness values. FIG. 7, which shows a drive time chart of the ACEL element, is a block diagram of the drive circuit according to the present invention. 1... Glass substrate, 2... Transparent electrode, 3, 5...
...Dielectric layer, 4...Light emitting layer, 6...Back electrode.
Claims (1)
示パネルの前記２つの誘電体層の各々の表面にあ
つて互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、前記走査電極
に沿つた各走査ラインを線順次走査で駆動を行う
交流駆動型薄膜EL表示パネルの駆動方法におい
て、 各走査ラインの駆動周期Ｔの始めに表示データ
の有無に応じて変調させた駆動電圧PWを当該走
査ラインの各表示素子に印加し、当該書き込み駆
動電圧PWiの印加終了後所定の時間TDｉ経過し
た後、前記書き込み駆動電圧PWiとは逆極性を有
するリフレツシユ駆動電圧PRiを前記各表示素子
に印加することにより前記各表示素子への交番電
圧の印加動作を行い、且つ各走査ラインにおける
前記書き込み駆動電圧の印加開始から前記リフレ
ツシユ駆動電圧の印加終了までの前記交番電圧印
加時間が各走査ライン間で時間的に重ならないよ
うにして、各走査ライン毎に前記交番電圧印加動
作を順次繰り返し、表示パネル全体を走査駆動す
ることを特徴とする交流駆動型薄膜EL表示パネ
ルの駆動方法。[Scope of Claims] 1. An EL display panel in which both main surfaces of a light-emitting layer are covered with dielectric layers, in which the intersections of a large number of electrode groups that intersect with each other on the surfaces of the two dielectric layers are used as display elements. A method for driving an AC-driven thin film EL display panel in which one electrode group of the dielectric layer is used as a data electrode, the other electrode group is used as a scanning electrode, and each scanning line along the scanning electrode is driven by line-sequential scanning. At the beginning of the drive period T of each scan line, a drive voltage PW modulated depending on the presence or absence of display data is applied to each display element of the scan line, and after the end of application of the write drive voltage PWi, a predetermined time T is applied. After D i has passed, a refresh drive voltage PRi having a polarity opposite to that of the write drive voltage PWi is applied to each of the display elements to apply an alternating voltage to each of the display elements. The alternating voltage application operation is sequentially repeated for each scanning line so that the alternating voltage application time from the start of application of the write drive voltage to the end of application of the refresh drive voltage does not overlap in time between each scanning line. , a method for driving an AC-driven thin-film EL display panel, characterized in that the entire display panel is scan-driven.
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 JPS6088998A (en) | 1985-05-18 |
| JPH0426116B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140077260A (en) * | 2012-12-12 | 2014-06-24 | 현대자동차주식회사 | Rotor of wound rotor synchronous motor |
Families Citing this family (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 |
| JPH0748138B2 (en) * | 1987-07-27 | 1995-05-24 | シャープ株式会社 | Driving method of electroluminescence display device |
| JP2682886B2 (en) * | 1990-04-25 | 1997-11-26 | シャープ株式会社 | Driving method of display device |
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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140077260A (en) * | 2012-12-12 | 2014-06-24 | 현대자동차주식회사 | Rotor of wound rotor synchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6088998A (en) | 1985-05-18 |
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