JPH06214518A - Display device constituted of flat display plate - Google Patents

Display device constituted of flat display plate

Info

Publication number
JPH06214518A
JPH06214518A JP1724891A JP1724891A JPH06214518A JP H06214518 A JPH06214518 A JP H06214518A JP 1724891 A JP1724891 A JP 1724891A JP 1724891 A JP1724891 A JP 1724891A JP H06214518 A JPH06214518 A JP H06214518A
Authority
JP
Japan
Prior art keywords
display
liquid crystal
display tube
fluorescent display
crystal shutter
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
JP1724891A
Other languages
Japanese (ja)
Inventor
Ryoichi Arai
良一 新井
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP1724891A priority Critical patent/JPH06214518A/en
Publication of JPH06214518A publication Critical patent/JPH06214518A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE:To enable display in both directions by using one sheet of fluorescent display tube and its driving circuit and power source by having a flat display plate which can make display on both planes, front and rear, and displaying numerical values and messages on the front surface and the rear surface by switching a liquid crystal shutter. CONSTITUTION:The fluorescent display tube 1 has 20 digits and two lines of fonts constituted of segments of 35 dots of 5X7, commas and decimal points with transparent electrodes consisting of ITO and can make display on the front surface and the rear surface. The liquid crystal shutter 2 holding a liquid crystal 5 is superposed by using transparent glass 4 between two sheets of polarizing plates 3 rotated by 90 deg. with each other respectively on the front surface and the rear surface of the fluorescent display tube 1. Circuits for controlling switch on and off of the liquid crystal shutter 2 as well as a driver IC for driving the fluorescent display tube 1, a character generator, a controller, a counter, a power source, an MPU for outputting data and a memory are packaged on the printed circuit board 6. Then, the cost increase of a double- sided display is halved or under and the size and thickness of the device are reduced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は蛍光表示管、プラズマ・
ディスプレイパネル等の平面表示板を用いた表示装置に
関し、特にECR,POS装置等のオペレータとカスタ
マー表示のように表面と裏面に数値メッセージを表示す
る平面表示板を用いた表示装置に関する。
BACKGROUND OF THE INVENTION The present invention relates to a fluorescent display tube, plasma
The present invention relates to a display device using a flat display plate such as a display panel, and more particularly to a display device using a flat display plate for displaying numerical messages on the front and back surfaces such as an operator and customer display such as an ECR or POS device.

【0002】[0002]

【従来の技術】従来、平面表示板を用いて表面と裏面に
内容を表示することが可能な表示装置を構成するには、
図5に示すように平面表示板を2枚使用し表示面が互い
に反対向きになるように構成するか、あるいは図6に示
すように1枚の平面表示板の裏面の表示像を鏡で反射し
て構成する方法があった。
2. Description of the Related Art Conventionally, in order to construct a display device capable of displaying contents on a front surface and a back surface using a flat display panel,
As shown in FIG. 5, two flat display panels are used so that the display surfaces are opposite to each other, or, as shown in FIG. 6, the display image on the back surface of one flat display panel is reflected by a mirror. Then there was a way to configure.

【0003】図5は平面表示板に蛍光表示管を使用して
構成した例で、同一の表示セグメントを有する蛍光表示
管1を駆動用ICと共にプリント基板6に実装し、蛍光
表示管の表示面が互いに反対向きになるようにプリント
基板の半田面をスペーサ15によりスペースをとり重ね
合わせて構成されている。蛍光表示管1は5×7の35
ドットのセグメントとカンマ、小数点から構成するフォ
ントを20桁2行分陽極基板の上にアルミ電極をスパッ
タし陽極14とし、その上に蛍光体を塗布してある。2
0桁ある上、下行の各フォントには一定の距離を保ちグ
リッド13を重ね合わせてあり、更にグリッドと一定の
距離を保ちフィラメント12が張ってある。フィラメン
ト12を加熱し発生した熱電子は、時分割的に印加され
るグリッド電圧により加速され選択された陽極に衝突す
ることにより陽極上の蛍光体を発光し所定のデータによ
り所定の表示をすることができる。
FIG. 5 shows an example in which a fluorescent display tube is used as a flat display panel. A fluorescent display tube 1 having the same display segment is mounted on a printed circuit board 6 together with a driving IC, and the display surface of the fluorescent display tube is mounted. Are arranged in such a manner that the solder surfaces of the printed circuit boards are overlapped with each other with a space provided therebetween by spacers 15. The fluorescent display tube 1 is 5 × 7 35
A font consisting of dot segments, commas, and decimal points corresponds to 20 columns and 2 lines, and an aluminum electrode is sputtered on an anode substrate to form an anode 14, and a phosphor is applied on the anode 14. Two
There are 0 digits, and a grid 13 is superposed on each of the upper and lower fonts with a constant distance, and a filament 12 is stretched with a constant distance from the grid. The thermoelectrons generated by heating the filament 12 are accelerated by the grid voltage applied in a time-division manner and collide with the selected anode, so that the phosphor on the anode is caused to emit light and a predetermined display is made with predetermined data. You can

【0004】すなわち20桁2行の本例の蛍光表示管を
時分割駆動で表示するには、陽極数と同じ74回路の陽
極駆動用ドライバーICと20回路のグリッド駆動用ド
ライバーIC、そしてこれらを制御するコントローラと
フィラメント電圧、陽極電圧、グリッド電圧を発生する
電源が必要となる。従って、表面と裏面に数値やメッセ
ージを表示するには本例の様に蛍光表示管、駆動用ドラ
イバーIC、コントローラ、電源部を実装した2組のプ
リント基板を互いに反対向きに重ね合わせるか、又は駆
動用ドライバーICと電源部の電流容量のみ2倍にし
て、この部分を共用して使用する必要がありコストアッ
プの要因となった。
That is, in order to display the 20-digit 2-row fluorescent display tube of this example by time-division driving, 74 circuits of anode driving driver ICs, 20 circuits of grid driving driver ICs, and the same number of anodes are used. A controller for controlling and a power source for generating filament voltage, anode voltage and grid voltage are required. Therefore, in order to display numerical values and messages on the front surface and the back surface, two sets of printed circuit boards on which a fluorescent display tube, a driving driver IC, a controller, and a power supply unit are mounted are stacked in opposite directions as in this example, or Only the current capacity of the driver IC for driving and the power supply section needs to be doubled, and this section must be shared for use, which is a factor of cost increase.

【0005】図6の例は図5の例と異なった蛍光表示管
1と反射鏡16を用いて構成している。すなわち、蛍光
表示管のフォント、桁と行の数、そして陽極、グリッ
ド、フィラメントの構造はそれぞれ図5の例と同じだが
陽極電極はITOの透明電極で形成している。従って表
面下の方向から見た正常な表示に対して裏面R方向から
も図6の点字で示すITOで透過した発光表示を見るこ
とができる。この像を反射鏡16を通して見ることによ
り、F方向から見たものと同じ正常な表示をすることが
できる。
The example of FIG. 6 is constructed by using a fluorescent display tube 1 and a reflecting mirror 16 different from the example of FIG. That is, the font of the fluorescent display tube, the number of columns and rows, and the structure of the anode, grid, and filament are the same as in the example of FIG. 5, but the anode electrode is formed of a transparent electrode of ITO. Therefore, in contrast to the normal display viewed from the direction below the front surface, the light-emitting display transmitted through the ITO shown in braille in FIG. 6 can be seen from the direction R on the back surface. By viewing this image through the reflecting mirror 16, the same normal display as that seen from the F direction can be displayed.

【0006】この例では蛍光表示管、駆動用ドライバー
IC、コントローラ、そして電源は1組用意するだけで
表面と裏面に数値、メッセージを表示することができる
が、反射鏡は図6で示す様に蛍光表示管の陽極基板面す
なわち、蛍光表示管の裏面より前に出す必要があり、か
つ陽極基板面より角度をつける必要があって表示装置が
厚くなり更に大型化するといった欠点があった。
In this example, a fluorescent display tube, a driver IC for driving, a controller, and a power supply can be used to display numerical values and messages on the front and back surfaces, but the reflector is as shown in FIG. There is a drawback that the display device becomes thicker and larger in size because it needs to be placed in front of the anode substrate surface of the fluorescent display tube, that is, the back surface of the fluorescent display tube, and needs to be angled from the anode substrate surface.

【0007】[0007]

【発明が解決しようとする課題】上述した2つの従来の
表示装置は、蛍光表示管並びに駆動用ドライバーICや
電源を2重に持つことによるコストアップや反射鏡を用
いることによる装置の大形化をさけられないという問題
点があった。
The above-mentioned two conventional display devices have the cost increase due to the dual possession of the fluorescent display tube, the driver IC for driving and the power source, and the enlargement of the device by using the reflecting mirror. There was a problem that I could not avoid it.

【0008】[0008]

【課題を解決するための手段】本発明はF方向およびR
方向の両方向へも表示可能な平面表示板、すなわち少な
くとも一方の電極が透明電極で形成されている平面表示
板と平面表示板の両面に液晶シャッタを備え、F方向お
よびR方向へ像を透過する液晶シャッタの切り換え手段
を有し、更にF方向およびR方向の表示データを切り換
え表示する手段とを備えている。
The present invention is directed to the F direction and the R direction.
A flat display plate capable of displaying in both directions, that is, a flat display plate in which at least one electrode is formed of a transparent electrode and liquid crystal shutters provided on both surfaces of the flat display plate to transmit an image in the F and R directions. The liquid crystal shutter has switching means, and means for switching and displaying display data in the F direction and the R direction.

【0009】すなわち、一定の間隔で対向する電極を備
え、対向する電極が選択された時に発光し、所定のデー
タにより所定の表示をする平面表示板を用いた表示装置
において、平面表示板の対向電極の少なくとも一方の電
極は光を透過する手段を有する電極を有し表裏2つの平
面の両方に表示することが可能な平面表示板を備え、2
つの平面上に液晶シャッタを備え、平面表示板の2つの
平面に切り換えて表示すべく表示データを切り換える手
段を備え、切り換えて表示された像に同期して2つの平
面上に備えた液晶シャッタを交互に開き所定のデータを
所定の平面に表示する手段を有することを特徴とする。
That is, in a display device using a flat display plate, which has electrodes facing each other at a constant interval, emits light when the facing electrodes are selected, and performs a predetermined display according to predetermined data, the flat display plates face each other. At least one of the electrodes has an electrode having a means for transmitting light and includes a flat display plate capable of displaying on both front and back two planes.
Liquid crystal shutters provided on two planes, means for switching display data to be displayed by switching to two planes of a flat display plate, and liquid crystal shutters provided on two planes in synchronism with images displayed by switching. It is characterized by having means for alternately opening and displaying predetermined data on a predetermined plane.

【0010】[0010]

【実施例】次に本発明について図面を参照して説明す
る。図1は本発明の第1の実施例の蛍光表示管を用いた
表示装置である。蛍光表示管1は図6で説明したものと
同じでITOの透明電極で5×7の35ドットのセグメ
ントとカンマ、小数点から構成するフォントを20桁2
行分有し、表面と裏面に表示可能である。蛍光表示管1
の表面と裏面には、それぞれ互いに90°回転させた2
枚の偏光板3の間に透明ガラス4を用い液晶5をはさみ
込んだ液晶シャッタ2を重ね合わせてある。プリント基
板6には、この液晶シャッタ2のスイッチオン・オフを
制御する回路、並びに蛍光表示管を駆動する駆動用ドラ
イバーIC7,キャラクタ・ジェネレイタ(CG)8,
コントローラ9,カウンタ10,電源11,そしてD0
〜D6のデータを出力するMPU,メモリーが実装して
ある(図2参照)。
The present invention will be described below with reference to the drawings. FIG. 1 shows a display device using a fluorescent display tube according to a first embodiment of the present invention. The fluorescent display tube 1 is the same as that described with reference to FIG. 6, and is a transparent electrode of ITO, and a font composed of a 5 × 7 35 dot segment, a comma, and a decimal point is 20 digits 2
It has lines and can be displayed on the front and back sides. Fluorescent display tube 1
The front and back of the
A liquid crystal shutter 2 having a transparent glass 4 and a liquid crystal 5 sandwiched between the polarizing plates 3 is superposed. The printed circuit board 6 has a circuit for controlling the switching on and off of the liquid crystal shutter 2, a driver IC 7 for driving the fluorescent display tube, a character generator (CG) 8,
Controller 9, counter 10, power supply 11, and D0
An MPU and a memory for outputting data D6 to D6 are mounted (see FIG. 2).

【0011】図2は図1の実施例の電気的接続を示すブ
ロック図、図3は、このブロック図の動作を説明するタ
イミングチャートを示す。メモリー内のプログラムによ
りMPUから出力された蛍光表示管1を制御する信号
は、MPU内部のカウンタ機能部10とコントローラ部
9を通してCG8のアドレス信号a,b,cとシフトレ
ジスタ,ラッチを含むドライバーIC7の制御信号,そ
して液晶シャッタ2の制御信号を出力する。
FIG. 2 is a block diagram showing the electrical connection of the embodiment of FIG. 1, and FIG. 3 is a timing chart for explaining the operation of this block diagram. The signal for controlling the fluorescent display tube 1 output from the MPU by the program in the memory is sent through the counter function unit 10 and the controller unit 9 in the MPU to the address signal a, b, c of the CG 8 and the driver IC 7 including the shift register and the latch. And a control signal for the liquid crystal shutter 2 are output.

【0012】図3のG1〜G20は蛍光表示管1のグリ
ッドG1〜G20を順次走査するグリッド印加電圧波形
を示した図で、ほぼEc(約60V)のピーク電圧が一
画面150Hz周期で印加される。走査方向は図3で示
すようにG1から順次G20まで走査した後はG20か
ら順次G1まで走査し以下これを繰り返す。この時5×
7の35ドットの陽極に数値、メッセージ用の文字デー
タをキャラクタ・ジェネレイタ8からグリッド走査時の
ブランキング時間tbに同期して出力する。CGのデー
タの書き方は図4の左半分に示すようにアドレスa,
b,cが0から4まで変化するにつれ順次キャラクタの
左端から出力するようになっている。従ってグリッドの
走査がG1から順次G20まで走査している間、すなわ
ち表面Fに正常な表示がされる期間はアドレスa,b,
cは0から4まで変化する。一方、グリッドの走査がG
20から順次G1まで走査している間、すなわち裏面R
に正常な表示がされる期間はアドレスa,b,cは4か
ら0まで変化するようコントロールされる。
Reference numerals G1 to G20 in FIG. 3 show grid applied voltage waveforms for sequentially scanning the grids G1 to G20 of the fluorescent display tube 1. A peak voltage of about Ec (about 60 V) is applied at a cycle of 150 Hz per screen. It As for the scanning direction, as shown in FIG. 3, after scanning from G1 to G20 sequentially, after scanning from G20 to G1 sequentially, this is repeated. 5x at this time
Numerical values and message character data are output from the character generator 8 to the 35-dot positive electrode 7 in synchronization with the blanking time tb during grid scanning. How to write CG data is as shown in the left half of FIG.
As b and c change from 0 to 4, the characters are sequentially output from the left end. Therefore, while the grid is being scanned from G1 to G20 sequentially, that is, during the period in which the surface F is normally displayed, the addresses a, b,
c varies from 0 to 4. On the other hand, the scanning of the grid is G
While scanning sequentially from 20 to G1, that is, the back surface R
The addresses a, b, and c are controlled so as to change from 4 to 0 during the normal display period.

【0013】液晶シャッタ2は、液晶部に電界印加すな
わちSがオンの時は光を透過せず電界印加しない時すな
わちSがオフの時は光を透過する特性を持つから、S信
号を表面の液晶シャッタ(F)にSの否定信号を裏面の
液晶シャッタ(R)に伝えることにより表面Fに正常の
表示をしている期間は裏面Rには表示を透過せず、逆に
裏面Rに正常の表示をしている期間は裏面Fには表示を
透過させないことができ、この間のCGの入力データを
変えなければ表面、裏面に同一の表示内容を表示するこ
とができる。
The liquid crystal shutter 2 has a characteristic of not transmitting light when an electric field is applied to the liquid crystal portion, that is, when S is on, and transmitting light when no electric field is applied, that is, when S is off, so that the S signal is transmitted to the surface. By transmitting a negative signal of S to the liquid crystal shutter (F) to the liquid crystal shutter (R) on the back surface, the display is not transmitted to the back surface R while the normal display is made on the front surface F, and conversely the normal state is displayed on the back surface R. The display can be prevented from being transmitted through the back surface F during the display of, and the same display contents can be displayed on the front surface and the back surface unless the input data of the CG is changed during this period.

【0014】図4は本発明の第2の実施例の要点を示す
CGのデータ書き方を表した図である。図4はデータD
7の論理でキャラクタの書き方を左右対称に書き込んだ
図でD7=Lの時は第1の実施例で示したものと同じ書
き方、D7=Hの時はそれと左右対称に書き込んだもの
である。従って、図1の表示装置を構成する図2のブロ
ック図においてコントローラ9はグリッド走査G1〜G
20,G20〜G1毎にCG8のアドレスa,b,cの
カウント方法を変える必要が無く、その代わりにデータ
D7をL,Hに切り換える信号、すなわち液晶シャッタ
2をスイッチングする信号と同じタイミング信号を印加
するだけでよく回路又はプログラムを簡素化することが
できる。なお電源11は5VDCから蛍光表示管駆動に
必要なフィラメント電圧Ef,グリッドEc,陽極電圧
Ebを出力するDC−DC/ACコンバータである。
FIG. 4 is a diagram showing how to write CG data showing the essential points of the second embodiment of the present invention. Figure 4 shows data D
In the figure in which the writing method of the character is written symmetrically by the logic of 7, when D7 = L, the writing method is the same as that shown in the first embodiment, and when D7 = H, the writing method is symmetrical. Therefore, in the block diagram of FIG. 2 which constitutes the display device of FIG. 1, the controller 9 controls the grid scans G1 to G1.
It is not necessary to change the counting method of the addresses a, b, c of the CG8 for each of 20, G20 to G1, and instead, a signal for switching the data D7 to L, H, that is, the same timing signal as the signal for switching the liquid crystal shutter 2 is used. The circuit or program can be simplified simply by applying the voltage. The power supply 11 is a DC-DC / AC converter that outputs a filament voltage Ef, a grid Ec, and an anode voltage Eb necessary for driving the fluorescent display tube from 5 VDC.

【0015】[0015]

【発明の効果】以上説明したように本発明は一枚の蛍光
表示管およびその駆動回路、電源を用い蛍光表示管のグ
リッド走査の方向を画面毎に変え、この走査に同期して
表示データの入力の方法も反対にし、かつ液晶シャッタ
をスイッチングして表面と裏面に数値、メッセージを表
示したので、従来問題となった駆動用ドライバーICと
電源を2重に持ったりすることによるコストアップを1
/2以下にする効果があり、さらに反射鏡を用いること
による表示装置の大形化を防ぐことができ小形化、薄形
化ができるという効果を有する。
As described above, according to the present invention, the direction of grid scanning of a fluorescent display tube is changed for each screen by using a single fluorescent display tube, its drive circuit, and a power source, and the display data is synchronized with this scanning. Since the input method was reversed and the liquid crystal shutter was switched to display numerical values and messages on the front and back sides, the cost increase due to having a double driver IC and power supply, which was a problem in the past, is 1
It has an effect of not more than / 2, and further has an effect that it is possible to prevent the display device from becoming large in size due to the use of the reflecting mirror, and to make it small and thin.

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

【図1】本発明の第1の実施例の表示装置の外観図であ
る。
FIG. 1 is an external view of a display device according to a first embodiment of the present invention.

【図2】図1に示した表示装置のブロック図である。FIG. 2 is a block diagram of the display device shown in FIG.

【図3】図2のブロック図の動作を説明する信号波形図
である。
FIG. 3 is a signal waveform diagram for explaining the operation of the block diagram of FIG.

【図4】本発明の第2の実施例のキャラクタ・ジェネレ
イタのデータ書き方を表した図である。
FIG. 4 is a diagram showing how to write data in a character generator according to a second embodiment of the present invention.

【図5】従来の表示装置を示す外観図である。FIG. 5 is an external view showing a conventional display device.

【図6】従来の表示装置の他の例を示す外観図である。FIG. 6 is an external view showing another example of a conventional display device.

【符号の説明】[Explanation of symbols]

1 蛍光表示管 2 液晶シャッタ 3 偏光板 4 透明ガラス 5 液晶 6 プリント基板 7 ドライバーIC 8 キャラクタ・ジェネレイタ 9 コントローラ 10 カウンタ 11 電源 12 フィラメント 13 グリッド 14 陽極 15 スペーサ 16 反射鏡 1 Fluorescent Display Tube 2 Liquid Crystal Shutter 3 Polarizing Plate 4 Transparent Glass 5 Liquid Crystal 6 Printed Circuit Board 7 Driver IC 8 Character Generator 9 Controller 10 Counter 11 Power Supply 12 Filament 13 Grid 14 Anode 15 Spacer 16 Reflector

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 一定の間隔で対向する電極を備え、相対
向する電極が選択された時に発光し所定のデータにより
所定の表示をする平面表示板を用いた表示装置におい
て、表裏2つの平面に表示することが可能な平面表示板
と、前記2つの平面上に設けられた液晶シャッタと、前
記平面表示板の2つの平面に切り換えて表示すべく表示
データを切り換える手段と、前記切り換えて表示された
像に同期して前記2つの平面上に備えた液晶シャッタを
交互に開き所定のデータを所定の平面に表示する手段と
を有することを特徴とする平面表示板を用いた表示装
置。
1. A display device using a flat display plate, which comprises electrodes facing each other at regular intervals and emits light when the electrodes facing each other are selected to display a predetermined display according to predetermined data. A flat display panel capable of displaying, a liquid crystal shutter provided on the two flat surfaces, a means for switching display data to switch between the two flat surfaces of the flat display board, and the switching display. And a means for displaying predetermined data on a predetermined plane by alternately opening liquid crystal shutters provided on the two planes in synchronization with the image.
JP1724891A 1991-02-08 1991-02-08 Display device constituted of flat display plate Pending JPH06214518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1724891A JPH06214518A (en) 1991-02-08 1991-02-08 Display device constituted of flat display plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1724891A JPH06214518A (en) 1991-02-08 1991-02-08 Display device constituted of flat display plate

Publications (1)

Publication Number Publication Date
JPH06214518A true JPH06214518A (en) 1994-08-05

Family

ID=11938651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1724891A Pending JPH06214518A (en) 1991-02-08 1991-02-08 Display device constituted of flat display plate

Country Status (1)

Country Link
JP (1) JPH06214518A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004199033A (en) * 2002-12-06 2004-07-15 Semiconductor Energy Lab Co Ltd Display device and its driving method, and electronic equipment
KR100750448B1 (en) * 2004-06-08 2007-08-22 가부시키가이샤 히타치 디스프레이즈 Display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04238386A (en) * 1990-08-02 1992-08-26 Internatl Business Mach Corp <Ibm> Electronic display system and method of displaying data

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04238386A (en) * 1990-08-02 1992-08-26 Internatl Business Mach Corp <Ibm> Electronic display system and method of displaying data

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004199033A (en) * 2002-12-06 2004-07-15 Semiconductor Energy Lab Co Ltd Display device and its driving method, and electronic equipment
KR100750448B1 (en) * 2004-06-08 2007-08-22 가부시키가이샤 히타치 디스프레이즈 Display device

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