JPH04276792A - Assembled type display device - Google Patents

Assembled type display device

Info

Publication number
JPH04276792A
JPH04276792A JP3038222A JP3822291A JPH04276792A JP H04276792 A JPH04276792 A JP H04276792A JP 3038222 A JP3038222 A JP 3038222A JP 3822291 A JP3822291 A JP 3822291A JP H04276792 A JPH04276792 A JP H04276792A
Authority
JP
Japan
Prior art keywords
display
circuit
individual
display device
level
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
JP3038222A
Other languages
Japanese (ja)
Inventor
Masatoshi Shimizu
正敏 清水
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 JP3038222A priority Critical patent/JPH04276792A/en
Publication of JPH04276792A publication Critical patent/JPH04276792A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To automatically request maintenance to a maintenance department, etc., by transmitting the output of a protection circuit representing the operating state of an individual display to a central control part by connecting in series or in parallel. CONSTITUTION:The display 3 provided with a display element 4 and driving circuits 5, 6 for display element and a control circuit 7 are connected in multiple stages, and the protection circuit 8 which monitors the operating state of the individual control circuit 7 and detects normalcy/abnormality is provided at the individual display 3. The protection circuit 8, when detecting the abnormality of the individual control circuit 7, stops a signal to be sent to a row electrode driving circuit 5 and a column electrode driving circuit 6. and stops a function as the display. Furthermore, the output of the protection circuit 8 is set so as to go to an 'H' level in a normal operation and to an 'L' level in an abnormal operation, and it is added from a transmission circuit 9 to a signal line group 2, and is connected in series sequentially in a direction from a terminal display to the central control part 1. Therefore, it is possible to detect that abnormality occurs in either directly connected individual display 3 when the level is the 'L' level by monitoring the level of the signal line group 2 by the central control part 1.

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、小容量の表示器を多段
接続して1つの大容量表示装置を構成する集合型表示装
置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective display device in which small-capacity displays are connected in multiple stages to form one large-capacity display device.

【0002】0002

【従来の技術】従来の小容量の表示器を多段接続して、
大容量の表示器とした集合型表示装置は、図5に示すよ
うに全体の表示情報を司る中央制御部1から、表示情報
や制御信号を各部分を構成する個別の表示器3に送り、
所望の表示をするようになっている。個別の表示器は、
プラズマ・ディスプレイパネル等の表示素子4とその電
極を駆動する行駆動回路5と列駆動回路6に必要な信号
を作り出す制御信号回路7とその制御信号回路7が正常
に動作しているかどうかを監視していて異常時に行駆動
回路5や列駆動回路6への信号を停止し表示器としての
動作を停止する保護回路8を有している。
[Prior art] Conventional small-capacity displays are connected in multiple stages,
As shown in FIG. 5, a collective display device with a large capacity display unit sends display information and control signals from a central control unit 1 that controls overall display information to individual display units 3 that constitute each part.
The desired display is made. Individual indicators are
Monitors whether the control signal circuit 7 that generates signals necessary for the row drive circuit 5 and column drive circuit 6 that drive display elements 4 such as plasma display panels and their electrodes, and the control signal circuit 7 are operating normally. It has a protection circuit 8 which stops signals to the row drive circuit 5 and column drive circuit 6 and stops the operation as a display device in the event of an abnormality.

【0003】0003

【発明が解決しようとする課題】この従来の集合型表示
装置では、個々の小容量の表示器には異常時に動作を停
止するような保護回路8を有しているが、その情報を外
部に引出す手段を持っていないため、このような表示器
を多段接続した場合、一部の表示器が異常で停止してい
ても、中央制御部1では異常の有無を検出できないとい
う問題点があった。
[Problems to be Solved by the Invention] In this conventional collective display device, each small-capacity display device has a protection circuit 8 that stops operation in the event of an abnormality. Since it does not have a means for pulling out, there is a problem that when such indicators are connected in multiple stages, even if some of the indicators are stopped due to an abnormality, the central control unit 1 cannot detect the presence or absence of an abnormality. .

【0004】0004

【課題を解決するための手段】本発明の小容量表示器を
多段接続して大容量の表示を可能にした集合型表示装置
は、個々の表示器の動作状態を示す信号を直列又は並列
に接続して、個々の表示器から中央制御部に伝達するこ
とにより、中央制御部で全体の表示装置が正常に機能し
ているか、異常があるかどうか検出可能な手段を有して
いる。
[Means for Solving the Problems] The collective display device of the present invention, which enables large capacity display by connecting small capacity displays in multiple stages, transmits signals indicating the operating status of individual indicators in series or in parallel. By connecting and transmitting information from each display device to the central control section, the central control section has a means for detecting whether the entire display device is functioning normally or whether there is an abnormality.

【0005】[0005]

【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の実施例を示すブロック図であ
る。中央制御部1は各々個別表示器に必要な表示情報や
制御信号を作り、それを伝達する信号線群2により各々
個別表示器3に送り出している。個別表示器3は自局に
必要な制御信号を含む情報のみを取り込み、その表示情
報に従い、プラズマ・ディスプレイパネル等の表示素子
4の行電極駆動回路5や列電極駆動回路6に信号を送り
、駆動信号に変え、所望の表示を得るようになっている
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention. The central control unit 1 creates display information and control signals necessary for each individual display, and sends them to each individual display 3 via a signal line group 2 for transmitting them. The individual display device 3 takes in only information including control signals necessary for its own station, and according to the display information, sends signals to the row electrode drive circuit 5 and column electrode drive circuit 6 of the display element 4 such as a plasma display panel. The desired display is obtained by changing the drive signal to a drive signal.

【0006】この個別表示器3は行電極駆動回路5や列
電極駆動回路6の他に個別制御回路7の動作状態を監視
し正常・異常を検出する保護回路8を有している。保護
回路8は個別制御回路7の異常を検出すると、行電極駆
動回路5や列電極駆動回路6に送る信号を停止し表示器
としての機能を停止する働きをする。この保護回路8の
出力を正常時“H”レベル,異常時“L”レベルになる
ようにし、伝達回路9から信号線群2へ追加し、末端表
示器から中央制御部1方向に順次直列に接続する。これ
により中央制御部1は信号線群2のレベルを監視して“
L”レベルになっていれば直接接続された個々の表示器
のいずれかに異常があることを検出できる。
In addition to the row electrode drive circuit 5 and the column electrode drive circuit 6, the individual display 3 has a protection circuit 8 that monitors the operating state of the individual control circuit 7 and detects whether it is normal or abnormal. When the protection circuit 8 detects an abnormality in the individual control circuit 7, it stops the signals sent to the row electrode drive circuit 5 and the column electrode drive circuit 6, thereby stopping the function as a display device. The output of this protection circuit 8 is made to be at the "H" level when normal and "L" level when abnormal, and is added from the transmission circuit 9 to the signal line group 2, and serially connected from the terminal display to the central control unit 1 direction. Connecting. As a result, the central control unit 1 monitors the level of the signal line group 2 and
If the level is "L", it can be detected that there is an abnormality in any of the directly connected display devices.

【0007】図2は第1の実施例の保護回路8の出力の
伝達回路9である。アンドゲート14は後段からの正常
/異常信号と自局表示器内の保護回路8の正常/異常信
号13の論理積を取り次のインバータ15に送る。アン
ドゲート14の入力線11は抵抗12でVcc(電源)
に接続してあるのは、この表示器が最終段になった時後
段から信号が無くても正常と判断するためであり、抵抗
12の値は数kΩから数10kΩの値が選ばれる。イン
バータ15はアンドゲート14からの信号を反転し、そ
の出力に接続された発光ダイオード16を点灯させる。 抵抗17は発光ダイオード16の電流制限用に入れられ
る。発光ダイオード16は後段及び自局の表示器が正常
なら点灯し異常なら消灯することになる。インバータ1
8はインバータ15で反転された信号を元にもどし次段
に送出するものである。
FIG. 2 shows a transmission circuit 9 for the output of the protection circuit 8 of the first embodiment. The AND gate 14 ANDs the normal/abnormal signal from the subsequent stage and the normal/abnormal signal 13 of the protection circuit 8 in the local display and sends it to the next inverter 15 . The input line 11 of the AND gate 14 is Vcc (power supply) with a resistor 12.
The reason for this is that when this indicator reaches the final stage, it is determined to be normal even if there is no signal from the subsequent stage, and the value of the resistor 12 is selected from several kΩ to several tens of kΩ. Inverter 15 inverts the signal from AND gate 14 and lights up light emitting diode 16 connected to its output. A resistor 17 is inserted to limit the current of the light emitting diode 16. The light emitting diode 16 will be turned on if the display devices of the subsequent stage and the own station are normal, and will be turned off if they are abnormal. Inverter 1
Reference numeral 8 returns the signal inverted by the inverter 15 and sends it to the next stage.

【0008】図3は本発明の第2の実施例である。中央
制御部1や個別表示器3は第1の実施例と同じであるが
信号線群2の構成が異なる。信号線群2は個別表示器3
の制御回路7を通らず、各々の個別表示器3に並列に接
続される。この方式では個別表示器3の保護回路8の出
力も並列に接続される。
FIG. 3 shows a second embodiment of the invention. The central control unit 1 and the individual displays 3 are the same as those in the first embodiment, but the configuration of the signal line group 2 is different. Signal line group 2 is individual display 3
are connected in parallel to each individual display 3 without passing through the control circuit 7. In this method, the output of the protection circuit 8 of the individual display 3 is also connected in parallel.

【0009】図4は並列接続時の保護回路8の出力の伝
達回路9である。この回路においては、保護回路8の出
力13をインバータ15で反転し、発光ダイオード16
を点灯し、インバータ18で元にもどし、並列接続ライ
ンへ出力する。ここでインバータ18はその出力がオー
プンコレクタ又はオープンドレインタイプのものを使う
必要がある。発光ダイオード16は自局個別表示器3が
正常なら点灯し、異常なら消灯することになる。抵抗1
9は並列接続される個別表示器3の段数によりインバー
タ18の駆動能力を越えない値にする。
FIG. 4 shows a transmission circuit 9 for the output of the protection circuit 8 when connected in parallel. In this circuit, the output 13 of the protection circuit 8 is inverted by the inverter 15, and the output 13 of the protection circuit 8 is inverted by the inverter 15.
is turned on, returned to its original state by the inverter 18, and outputted to the parallel connection line. Here, the inverter 18 must have an open collector or open drain type output. The light emitting diode 16 will be turned on if the own station's individual display 3 is normal, and will be turned off if it is abnormal. resistance 1
9 is set to a value that does not exceed the driving capacity of the inverter 18 depending on the number of stages of individual display devices 3 connected in parallel.

【0010】0010

【発明の効果】以上説明したように本発明は、個別の表
示器の動作状態を示す保護回路の出力を直列又は並列に
接続して、中央制御部に伝達するようにしたので、中央
制御部で表示装置の全体が正常に動作しているか、一部
に異常の表示器があるかどうか検出可能となり、保守部
門等に自動的に保守を依頼できるという効果を有する。
Effects of the Invention As explained above, the present invention connects the outputs of the protection circuits indicating the operating status of individual indicators in series or parallel and transmits them to the central control unit. This has the effect that it is possible to detect whether the entire display device is operating normally or whether there is an abnormality in a part of the display device, and it is possible to automatically request maintenance to a maintenance department or the like.

【図面の簡単な説明】[Brief explanation of the drawing]

【図1】本発明の第1の実施例を示す集合型表示装置の
ブロック図である。
FIG. 1 is a block diagram of a collective display device showing a first embodiment of the present invention.

【図2】第1の実施例の出力伝達回路である。FIG. 2 is an output transfer circuit of the first embodiment.

【図3】本発明の第2の実施例を示す集合型表示装置の
ブロック図である。
FIG. 3 is a block diagram of a collective display device showing a second embodiment of the present invention.

【図4】第2の実施例の出力伝達回路である。FIG. 4 is an output transfer circuit of a second embodiment.

【図5】従来の集合型表示装置のブロック図である。FIG. 5 is a block diagram of a conventional collective display device.

【符号の説明】[Explanation of symbols]

1    中央制御部 2    信号線群 3    個別表示器 4    表示素子 5    行電極駆動回路 6    列電極駆動回路 7    個別制御回路 8    保護回路 9    伝達回路 11    入力線 12,17,19    抵抗 13    保護回路8の出力 14    アンドゲート 15,18    インバータ 16    発光ダイオード 1 Central control section 2 Signal line group 3 Individual display 4 Display element 5 Row electrode drive circuit 6 Column electrode drive circuit 7 Individual control circuit 8 Protection circuit 9 Transmission circuit 11 Input line 12, 17, 19 Resistance 13 Output of protection circuit 8 14 And Gate 15, 18 Inverter 16 Light emitting diode

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  表示素子とその駆動回路及び制御回路
を有する小容量の表示器を多段接続して、大容量の表示
を可能とした集合型表示装置において、各々の表示器の
動作状態を示す信号を個々の表示器から中央制御部に伝
達することにより、中央制御部で全体の表示装置が正常
に動作しているか、一部異常があるか検出可能な手段を
有することを特徴とする集合型表示装置。
Claim 1: In a collective display device in which small-capacity displays each having a display element and its drive circuit and control circuit are connected in multiple stages to enable a large-capacity display, the operating status of each display device is indicated. A set characterized by having a means for transmitting signals from each display device to the central control section so that the central control section can detect whether the entire display device is operating normally or whether there is an abnormality in some part. Type display device.
JP3038222A 1991-03-05 1991-03-05 Assembled type display device Pending JPH04276792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3038222A JPH04276792A (en) 1991-03-05 1991-03-05 Assembled type display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3038222A JPH04276792A (en) 1991-03-05 1991-03-05 Assembled type display device

Publications (1)

Publication Number Publication Date
JPH04276792A true JPH04276792A (en) 1992-10-01

Family

ID=12519278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3038222A Pending JPH04276792A (en) 1991-03-05 1991-03-05 Assembled type display device

Country Status (1)

Country Link
JP (1) JPH04276792A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004361690A (en) * 2003-06-05 2004-12-24 Matsushita Electric Ind Co Ltd Plasma display device
US7129936B2 (en) 1999-08-12 2006-10-31 Seiko Epson Corporation Display unit and electronic device including the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55126294A (en) * 1979-03-23 1980-09-29 Toshiba Electric Equip Information display unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55126294A (en) * 1979-03-23 1980-09-29 Toshiba Electric Equip Information display unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7129936B2 (en) 1999-08-12 2006-10-31 Seiko Epson Corporation Display unit and electronic device including the same
USRE42569E1 (en) 1999-08-12 2011-07-26 Seiko Epson Corporation Display unit, electronic device using the same, and method of inspecting the display unit
JP2004361690A (en) * 2003-06-05 2004-12-24 Matsushita Electric Ind Co Ltd Plasma display device

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Effective date: 19971104