JPH0135462B2 - - Google Patents
Info
- Publication number
- JPH0135462B2 JPH0135462B2 JP20780482A JP20780482A JPH0135462B2 JP H0135462 B2 JPH0135462 B2 JP H0135462B2 JP 20780482 A JP20780482 A JP 20780482A JP 20780482 A JP20780482 A JP 20780482A JP H0135462 B2 JPH0135462 B2 JP H0135462B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electron
- deflection
- electron gun
- picture tube
- 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
Links
- 238000010894 electron beam technology Methods 0.000 claims description 18
- 230000005684 electric field Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/123—Flat display tubes
- H01J31/124—Flat display tubes using electron beam scanning
Description
【発明の詳細な説明】
産業上の利用分野
本発明はテレビジヨン受像機、電子計算機の端
末デイスプレイ等の映像表示装置に使用される映
像管に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a picture tube used in picture display devices such as television receivers and computer terminal displays.
従来例の構成とその問題点
通常のテレビジヨン受像用映像管は、電子銃か
ら発射する電子ビームが偏向されない時には、螢
光面にほゞ垂直に入射するように構成されてお
り、このため映像管の奥行きが大となる。この奥
行きを小さくするため、電子銃を螢光面の面方向
に沿う水平あるいは垂直方向に沿う方向に配置し
て扁平化をはかつた、いわゆる扁平受像管が提案
されてきた。Conventional configuration and its problems A typical television picture tube is configured so that when the electron beam emitted from the electron gun is not deflected, the electron beam is incident almost perpendicularly to the phosphor surface. The depth of the tube increases. In order to reduce this depth, a so-called flat picture tube has been proposed in which the electron gun is arranged horizontally or vertically along the surface direction of the fluorescent surface.
この扁平受像管の一例を第１図に示す。第１図
Ａは正面図、Ｂは側面断面図である。電子銃１１
から電子ビーム１２が発射され、それを偏向コイ
ル１３で水平、垂直に偏向する。電子ビームの螢
光面１５上での垂直走査は偏向コイル１３の垂直
微少偏向と、背面電極１４と螢光面１５上に形成
されているアルミ等によるメタルバツク電極１６
間の電界によつて行なわれる。すなわちメタルバ
ツク電極１６の電圧を背面電極１４に印加する電
圧より高くする。一方水平偏向は偏向コイル１３
でのみ行なうが、常に同じ強さの偏向磁界にて
は、第１図Ｃに示すように電子ビームの飛距離の
大きい、すなわち垂直方向の上方では水平振幅が
大で、垂直方向の下方では小となる、いわゆる扇
形偏向歪を生じる。このため偏向コイル１３に流
す電流に補正電流を流して偏向歪のない画像を得
るようにしている。 An example of this flat picture tube is shown in FIG. FIG. 1A is a front view, and FIG. 1B is a side sectional view. electron gun 11
An electron beam 12 is emitted from the electron beam 12, and is deflected horizontally and vertically by a deflection coil 13. Vertical scanning of the electron beam on the fluorescent surface 15 is performed by vertical slight deflection of the deflection coil 13 and a metal back electrode 16 made of aluminum or the like formed on the back electrode 14 and the fluorescent surface 15.
This is done by an electric field between That is, the voltage of the metal back electrode 16 is made higher than the voltage applied to the back electrode 14. On the other hand, for horizontal deflection, the deflection coil 13
However, when the deflection magnetic field is always the same strength, as shown in Figure 1C, the electron beam travels a long distance, that is, the horizontal amplitude is large in the vertically upward direction, and small in the vertically downward direction. This results in so-called fan-shaped deflection distortion. For this reason, a correction current is passed through the deflection coil 13 to obtain an image free of deflection distortion.
以上に説明した従来の扁平受像管の問題点は偏
向歪の補正を垂直、水平の両方共行なわなければ
ならず、補正波形も複雑となり、このため消費電
力も大となる。また補正量を少なくしようとする
と、画像表示面の大きさのわりに、第１図でいえ
ば垂直方向に長い映像管となり、空間利用効率が
悪い。 The problem with the conventional flat picture tube described above is that the deflection distortion must be corrected both vertically and horizontally, the correction waveform becomes complex, and the power consumption is also large. Furthermore, if an attempt is made to reduce the amount of correction, the picture tube becomes long in the vertical direction in FIG. 1, compared to the size of the image display surface, resulting in poor space utilization efficiency.
発明の目的
本発明はこのような欠点を解消したもので、偏
向歪の小さい、かつ空間利用効率のよい映像管を
提供するものである。OBJECTS OF THE INVENTION The present invention eliminates these drawbacks and provides a picture tube with low deflection distortion and good space utilization efficiency.
発明の構成
本発明は螢光面に平行な面内に複数の電子銃を
水平走査方向に一列に並べ、各電子銃毎に水平偏
向電極を設け、垂直偏向は各電子銃に共通の一対
の垂直予備偏向電極と、螢光面に対向配置した背
面電極により行なわせるようにした映像管であ
る。Structure of the Invention The present invention arranges a plurality of electron guns in a line in the horizontal scanning direction in a plane parallel to the fluorescent surface, provides a horizontal deflection electrode for each electron gun, and uses a pair of common electron guns for vertical deflection. This is a picture tube that uses a vertical pre-deflection electrode and a back electrode placed opposite the fluorescent surface.
実施例の説明
以下本発明の実施例を図面を用いて詳細に説明
する。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第２図に本発明の実施例を示す。電子銃２１を
水平方向に一列に多数配置し、各電子銃２１−
１，２１−２，……２１−ｎから発射された電子
ビームは各水平偏向電極２２により微少偏向され
る。電子銃の本数をｎ本とし、水平方向の全有効
走査幅をｌとすると、各電子銃２１−１，２１−
２，……２１−ｎからの電子ビームが水平偏向さ
れる領域はｌ／ｎとなる。水平偏向電極２２を通
過した電子ビームは、水平方向に一体となつた一
対の垂直予備偏向電極２３に入り、さらに背面電
極２４とメタルバツク電極２６間の電界によつて
螢光面２５上を垂直走査する。 FIG. 2 shows an embodiment of the present invention. A large number of electron guns 21 are arranged in a row in the horizontal direction, and each electron gun 21-
The electron beams emitted from 1, 21-2, . . . 21-n are slightly deflected by each horizontal deflection electrode 22. When the number of electron guns is n and the total effective scanning width in the horizontal direction is l, each electron gun 21-1, 21-
The area where the electron beam from 2, . . . 21-n is horizontally deflected is l/n. The electron beam that has passed through the horizontal deflection electrode 22 enters a pair of vertical preliminary deflection electrodes 23 integrated in the horizontal direction, and is further vertically scanned on the fluorescent surface 25 by the electric field between the back electrode 24 and the metal back electrode 26. do.
電子銃の基本構成は従来のテレビ用受像管に使
用されているものと同じでよく、第３図にその中
心軸断面を示す。３１はカソード、３２は制御電
極（G1）、３３はビーム引出し用第２電極（G2）、
３４は主レンズ系へ入るビームのひろがりを小さ
くするためのプリフオーカス電極（G3）、３５は
フオーカス電極（G4）、３６はビーム加速電極
（G5）、３７は水平偏向電極、３８は垂直予備偏
向電極である。本発明にこの構成の電子銃を適用
する時の第１の実施例は第４図Ａに示すようにカ
ソード４１は板状あるいは線状とし、G1電極４
２を分割し、G2電極４３、G3電極４４、G4電極
４５、G5電極４６を水平方向に一体化したもの、
第２の実施例として、水平軸断面でみた同図Ｂに
示すようにG1電極４２、G2電極４３をそれぞれ
分割し、他の電極４３〜４６を水平方向に一体化
したもの、第３の実施例として同図Ｃに示すよう
にカソード４１を個々に独立させ、他の電極４２
〜４６を水平方向に一体化したもの、第３の実施
例におけるG2電極４３をカソード４１に対応し
て分割し、他の電極４２，４４〜４６を水平方向
に１体化した同図Ｄに示すような第４の実施例と
することができる。 The basic structure of the electron gun may be the same as that used in conventional television picture tubes, and FIG. 3 shows a cross section along its central axis. 31 is a cathode, 32 is a control electrode (G 1 ), 33 is a second electrode for beam extraction (G 2 ),
34 is a prefocus electrode (G 3 ) for reducing the spread of the beam entering the main lens system, 35 is a focus electrode (G 4 ), 36 is a beam acceleration electrode (G 5 ), 37 is a horizontal deflection electrode, and 38 is a vertical electrode. This is a preliminary deflection electrode. In the first embodiment when applying the electron gun with this configuration to the present invention, as shown in FIG. 4A, the cathode 41 is plate-shaped or linear, and the G1 electrode 4
2 is divided, and a G 2 electrode 43, a G 3 electrode 44, a G 4 electrode 45, and a G 5 electrode 46 are integrated in the horizontal direction,
As a second embodiment, the G1 electrode 42 and the G2 electrode 43 are each divided as shown in FIG. As an example of this, the cathodes 41 are made independent as shown in FIG.
46 in the horizontal direction, and the same figure D in which the G2 electrode 43 in the third embodiment is divided corresponding to the cathode 41 and the other electrodes 42, 44 to 46 are integrated in the horizontal direction. A fourth embodiment as shown in FIG.
次に前記実施例の具体的な動作を説明する。映
像信号の処理系統図を第５図に説明する。 Next, the concrete operation of the above embodiment will be explained. A processing system diagram of a video signal is explained in FIG.
テレビジヨン同期信号５２によつてタイミング
パルス発生器５４で後述する回路ブロツクを駆動
させるタイミングパルスを発生させる。まずその
中の１つのタイミングパルスで、復調された映像
信号５１をＡ／Ｄコンバータ５３にてデイジタル
信号に変換し、１水平走査期間（以下1H）の信
号を第１のラインメモリ回路５５に入力する。
1Hの信号が全て入力されると、その信号は同時
に第２のラインメモリ回路５６に転送され、次の
1Hの信号がまた第１のラインメモリ回路５５に
入力される。第２のラインメモリ回路５６に転送
された信号は1H間記憶保持されるとともに、
Ｄ／Ａコンパータ５７に信号を送り、ここでもと
の信号に変換され、これを増幅して映像管の電子
銃の電子ビーム制御電極に印加する。かかるライ
ンメモリー回路は時間軸の変換回路として用いて
いる。すなわち第６図に示すように1Hの信号６
１の映像信号時間Ｔを、用いる電子銃の本数をｎ
本とするとＴ／ｎに分割し、個々の期間の映像信
号の時間軸をｎ倍してＴとし、かつ水平走査周期
に同期して同時に並行して取り出される。そして
信号６２は第２図の電子銃２１−２の電極に信号
６３，６４はそれぞれ電子銃２１−２，２１−３
の電極に入力される。このようにして1Hの画像
は形成される。したがつて第１図に示した従来例
のように１本の電子銃を用いた時に得られる画面
の明るさと同じ明るさの画像を得ようとすると、
個々の電子銃からの電子ビーム量は１／ｎです
み、非常に細いビームスポツトが得られ鮮鋭な画
像を表示することができる。さらに個々の電子銃
からの電子ビームの水平偏向領域はｌ／ｎでよい
ため、前記扇形の偏向歪量は非常に小さくなり、
補正量も少なく、ｎの選び方によつては補正なし
で済むことも可能である。 The television synchronization signal 52 causes a timing pulse generator 54 to generate timing pulses for driving circuit blocks to be described later. First, using one of the timing pulses, the demodulated video signal 51 is converted into a digital signal by the A/D converter 53, and the signal for one horizontal scanning period (hereinafter referred to as 1H) is input to the first line memory circuit 55. do.
When all 1H signals are input, the signals are simultaneously transferred to the second line memory circuit 56 and the next
The 1H signal is also input to the first line memory circuit 55. The signal transferred to the second line memory circuit 56 is stored and held for 1H, and
The signal is sent to the D/A converter 57, where it is converted to the original signal, amplified, and applied to the electron beam control electrode of the electron gun of the picture tube. This line memory circuit is used as a time axis conversion circuit. In other words, as shown in Fig. 6, the 1H signal 6
1 video signal time T, the number of electron guns used is n
In the case of a book, it is divided into T/n, the time axis of the video signal of each period is multiplied by n to T, and is simultaneously taken out in parallel in synchronization with the horizontal scanning period. The signal 62 is applied to the electrode of the electron gun 21-2 in FIG.
is input to the electrode. In this way, a 1H image is formed. Therefore, if you try to obtain an image with the same brightness as the screen brightness obtained when using one electron gun as in the conventional example shown in Fig. 1,
The amount of electron beam from each electron gun can be reduced to 1/n, and a very narrow beam spot can be obtained to display a sharp image. Furthermore, since the horizontal deflection area of the electron beam from each electron gun only needs to be l/n, the amount of deflection distortion in the fan shape becomes very small.
The amount of correction is also small, and depending on how n is selected, it may be possible to do without correction.
第３図に示した基本構成の電子銃を適用した本
発明の電子銃構成の実施例１、２すなわち第４図
Ａ，Ｂの構成においては、映像信号はG1電極４
２に印加される。第４図Ｂは全てのG1電極４２
に同じ電圧が印加された時、各電子銃からの電子
ビーム量が異なるようなことが生じた場合、分割
されたG2電極４３の電圧を個々に調整すること
で、各電子ビーム電流が同一になるようにする。 In Embodiments 1 and 2 of the electron gun configuration of the present invention to which the electron gun with the basic configuration shown in FIG. 3 is applied, that is, the configurations shown in FIGS .
2. Figure 4B shows all G 1 electrodes 42.
If the amount of electron beam from each electron gun differs when the same voltage is applied to the electron beams, by individually adjusting the voltage of the divided G2 electrode 43, each electron beam current can be made the same. so that it becomes
第３、４の実施例、すなわち第４図Ｃ，Ｄの構
成は映像信号をカソード４１に供給されるように
構成されており、この場合も各電子銃からの電子
ビーム電流の放出特性が異なるような場合は第４
図Ｄのように、G2電極４３を分割し、それぞれ
のG2電極電圧を調整して特性を揃えることがで
きる。 The third and fourth embodiments, that is, the configurations shown in FIGS. 4C and 4D, are configured so that the video signal is supplied to the cathode 41, and in this case also, the emission characteristics of the electron beam current from each electron gun are different. In such cases, the fourth
As shown in Figure D, the characteristics can be made uniform by dividing the G 2 electrode 43 and adjusting the voltage of each G 2 electrode.
また電子銃の組み立て時の精度によつては、
個々の電子銃からの螢光面上のビームスポツト位
置間隔が一定でない場合も生じる。このため水平
方向のビームスポツト位置調整を個々に行なう必
要がある。第７図はこのための水平偏向回路の一
実施例である。 Also, depending on the accuracy when assembling the electron gun,
In some cases, the distance between the beam spots on the fluorescent surface from each electron gun is not constant. Therefore, it is necessary to individually adjust the beam spot position in the horizontal direction. FIG. 7 shows an embodiment of a horizontal deflection circuit for this purpose.
入力端子７１に入力したテレビ水平同期信号を
水平偏向波形発生回路７２に供給して、極性の互
いに異なる鋸歯状波を発生させ、これをそれぞれ
コンデンサＣを通してｎ組の抵抗マトリツクス回
路に送る。ここでは水平偏向電極に供給する直流
電圧７４が抵抗R1を介して入力され、コンデン
サＣの出力部を結合している。このコンデンサー
出力端間を抵抗R2、可変抵抗器Rvで結合すると、
可変抵抗器Rvによつて、コンデンサ出力端の電
位を変えることができ、ビームの水平位置調整を
行なうことが可能である。 A television horizontal synchronizing signal inputted to an input terminal 71 is supplied to a horizontal deflection waveform generation circuit 72 to generate sawtooth waves having mutually different polarities, and these are sent to n sets of resistance matrix circuits through capacitors C, respectively. Here, the DC voltage 74 supplied to the horizontal deflection electrode is inputted via a resistor R1 , which is coupled to the output of the capacitor C. If you connect the output terminals of this capacitor with a resistor R 2 and a variable resistor Rv, you get
The variable resistor Rv allows the potential at the output end of the capacitor to be changed, making it possible to adjust the horizontal position of the beam.
発明の効果
以上のように、本発明は螢光面に平行な面内に
複数の電子銃を水平走査方向に一列に並べて配
し、各電子銃毎に水平偏向電極を設け、各電子銃
に共通の一対の垂直予備偏向電極を設けるととも
に螢光面に対向して背面電極を設けた扁平形の映
像管であり、多数の電子銃（ｎ本）を用いること
により、個々の電子ビーム量を減少せしめて非常
に鮮鋭なかつ、より明るい画像が得られ、かつま
た偏向歪量を減少せしめることができる。またこ
れにともない電子銃と螢光面間の距離が小さくで
き、映像管の空間利用効率を高めることが可能と
なる。Effects of the Invention As described above, the present invention arranges a plurality of electron guns in a line in the horizontal scanning direction in a plane parallel to the fluorescent surface, and provides a horizontal deflection electrode for each electron gun. It is a flat video tube equipped with a common pair of vertical preliminary deflection electrodes and a back electrode facing the fluorescent surface.By using a large number of electron guns (n), it is possible to control the amount of individual electron beams. By reducing this, a very sharp and brighter image can be obtained, and the amount of deflection distortion can also be reduced. Additionally, the distance between the electron gun and the fluorescent surface can be reduced, making it possible to improve the space utilization efficiency of the picture tube.
第１図Ａ，Ｂ，Ｃはそれぞれ従来の扁平受像管
の一例を示す正面図、側面断面図および偏向状態
説明図、第２図Ａ，Ｂは本発明による映像管の実
施例を示す正面図および側面図、第３図は本発明
に使用される電子銃の概念図、第４図Ａ〜Ｄは
各々本発明による映像管の電子銃構成を示す斜視
図および断面図、第５図は本発明による映像管の
映像処理回路の一例を示すブロツク図、第６図は
第５図の回路構成の動作を説明するための波形
図、第７図は本発明の映像管に使用される水平偏
向回路の一例を示す結線図である。
２１，２１−１，２１−２，…２１−ｎ……電
子銃、２２……水平偏向電極、２３……垂直予備
偏向電極、２４……背面電極、２５……螢光面、
２６……メタルバツク電極、３１，４１……カソ
ード、３２，４２……G1電極、３３，４３……
G2電極、３４，４４……G3電極、３５，４５…
…G4電極、３６，４６……G5電極、３７……水
平偏向電極、３８……垂直偏向電極、５３……
Ａ／Ｄコンバータ、５４……タイミングパルス発
生器、５５，５６……ラインメモリ回路、５７…
…Ｄ／Ａコンバータ、７２……水平偏向波形発生
回路。
FIGS. 1A, B, and C are a front view, a side sectional view, and a diagram illustrating the deflection state, respectively, showing an example of a conventional flat picture tube, and FIGS. 2A, B are front views showing an embodiment of the picture tube according to the present invention. and a side view, FIG. 3 is a conceptual diagram of an electron gun used in the present invention, FIGS. A block diagram showing an example of the video processing circuit of the picture tube according to the invention, FIG. 6 is a waveform diagram for explaining the operation of the circuit configuration of FIG. 5, and FIG. 7 is a horizontal deflection diagram used in the picture tube of the invention. FIG. 2 is a wiring diagram showing an example of a circuit. 21, 21-1, 21-2,...21-n...electron gun, 22...horizontal deflection electrode, 23...vertical preliminary deflection electrode, 24...back electrode, 25...fluorescent surface,
26...Metal back electrode, 31,41...Cathode, 32,42... G1 electrode, 33,43...
G 2 electrodes, 34, 44...G 3 electrodes, 35, 45...
...G 4 electrode, 36, 46...G 5 electrode, 37...horizontal deflection electrode, 38...vertical deflection electrode, 53...
A/D converter, 54... timing pulse generator, 55, 56... line memory circuit, 57...
...D/A converter, 72...Horizontal deflection waveform generation circuit.
Claims (1)
査方向に一列に並べると共に、各電子銃には独立
した個々の水平偏向電極を配置し、垂直方向への
偏向は一対の垂直予備偏向電極、および蛍光面と
背面電極間の電界によつて行わせることを特徴と
する映像管。 ２ 電子銃の陰極として１本の線状陰極または板
状陰極を使用し、制御電極のみを分割独立させ、
個々の電子銃に相当する部分のその他の電極は、
水平方向に一体化してなる特許請求の範囲第１項
記載の映像管。 ３ 電子銃のビーム引出し電極を個々に分割独立
させた特許請求の範囲第１項記載の映像管。 ４ 電子銃の陰極として個々に独立したものを使
用し、個々の電子銃に相当する部分の他の電極は
水平方向に一体化してなる特許請求の範囲第１項
記載の映像管。 ５ 電子銃の陰極およびビーム引出し電極を分割
独立させた特許請求の範囲第１項記載の映像管。[Claims] 1. A plurality of electron guns are arranged in a line in the horizontal scanning direction in a plane parallel to the phosphor screen, and each electron gun is provided with an independent horizontal deflection electrode to deflect the electron beam in the vertical direction. An image tube characterized in that the pre-deflection is performed by a pair of vertical pre-deflection electrodes and an electric field between a fluorescent screen and a back electrode. 2. Use one linear cathode or plate cathode as the cathode of the electron gun, and separate only the control electrode,
Other electrodes corresponding to individual electron guns are
The picture tube according to claim 1, which is integrated in the horizontal direction. 3. The picture tube according to claim 1, wherein the beam extraction electrodes of the electron gun are individually divided and made independent. 4. The picture tube according to claim 1, in which individual cathodes for the electron guns are used, and other electrodes corresponding to the individual electron guns are integrated in the horizontal direction. 5. The picture tube according to claim 1, wherein the cathode and beam extraction electrode of the electron gun are separated and independent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20780482A JPS5998443A (en) | 1982-11-26 | 1982-11-26 | Image tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20780482A JPS5998443A (en) | 1982-11-26 | 1982-11-26 | Image tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5998443A JPS5998443A (en) | 1984-06-06 |
| JPH0135462B2 true JPH0135462B2 (en) | 1989-07-25 |
Family
ID=16545766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20780482A Granted JPS5998443A (en) | 1982-11-26 | 1982-11-26 | Image tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5998443A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8700486A (en) * | 1987-02-27 | 1988-09-16 | Philips Nv | DISPLAY DEVICE. |
| NL8702829A (en) * | 1987-11-26 | 1989-06-16 | Philips Nv | DISPLAY DEVICE. |
-
1982
- 1982-11-26 JP JP20780482A patent/JPS5998443A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5998443A (en) | 1984-06-06 |
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