JPH0384893U - - Google Patents
Info
- Publication number
- JPH0384893U JPH0384893U JP14409689U JP14409689U JPH0384893U JP H0384893 U JPH0384893 U JP H0384893U JP 14409689 U JP14409689 U JP 14409689U JP 14409689 U JP14409689 U JP 14409689U JP H0384893 U JPH0384893 U JP H0384893U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- test
- circuit
- generation circuit
- signal generation
- 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
Links
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 230000003213 activating effect Effects 0.000 claims 1
- 230000004913 activation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
第１図は本考案に係る画像表示装置のセルフテ
スト回路の一実施例を示すブロツク回路図、第２
図は一般的なパソコンの構成を示す概略図である
。
１……パソコン本体、３……画像表示装置（Ｃ
ＲＴデイスプレイ装置）、７……映像信号ライン
、９……切換え回路、１１……同期信号ライン、
１５……同期信号検出回路、１７……テスト信号
発生回路、１９……プリアンプ、２１……同期信
号処理回路、Ｐ１，Ｐ２，Ｔ１，Ｔ２……固定端
子、Ｐ３，Ｔ３……可動端子、Ｔｒ……トランジ
スタ。
FIG. 1 is a block circuit diagram showing one embodiment of a self-test circuit for an image display device according to the present invention, and FIG.
The figure is a schematic diagram showing the configuration of a general personal computer. 1...PC body, 3...Image display device (C
RT display device), 7...Video signal line, 9...Switching circuit, 11...Synchronization signal line,
15...Synchronization signal detection circuit, 17...Test signal generation circuit, 19...Preamplifier, 21...Synchronization signal processing circuit, P1 , P2 , T1 , T2 ...Fixed terminal, P3 , T3 ...Movable terminal, Tr...Transistor.
Claims (1)
ラインと、 テスト用の映像信号および同期信号を作成出力
するテスト信号発生回路と、 前記信号ラインに挿入され前記信号ラインを伝
送した信号と前記テスト用信号発生回路からの出
力信号を切換え出力する信号切換え回路と、 前記信号ラインを伝送する同期信号の無信号状
態を検出して前記テスト信号発生回路を起動させ
るとともに、前記テスト用信号発生回路からの出
力信号を選択するよう前記信号切換え回路を動作
させる無信号判別回路と、 を具備してなることを特徴とする画像表示装置の
セルフテスト回路。 (2) 前記無信号判別回路は前記テスト信号発生
回路への電源レベルを制御してこれを起動制御す
るとともに、前記信号切換え回路は前記テスト信
号発生回路への電源レベル状態によつて切換え制
御される請求項１記載の画像表示装置のセルフテ
スト回路。[Claims for Utility Model Registration] (1) A signal line through which a video signal and a synchronization signal are transmitted; a test signal generation circuit that generates and outputs a test video signal and a synchronization signal; and a test signal generation circuit inserted into the signal line to transmit the signal. a signal switching circuit that switches and outputs the signal transmitted through the line and the output signal from the test signal generation circuit; detecting a no-signal state of the synchronization signal transmitted through the signal line and activating the test signal generation circuit; A self-test circuit for an image display device, comprising: a no-signal discrimination circuit that operates the signal switching circuit to select an output signal from the test signal generation circuit. (2) The no-signal discrimination circuit controls the power level to the test signal generation circuit to control its activation, and the signal switching circuit is switched and controlled depending on the state of the power level to the test signal generation circuit. A self-test circuit for an image display device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14409689U JPH0384893U (en) | 1989-12-15 | 1989-12-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14409689U JPH0384893U (en) | 1989-12-15 | 1989-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0384893U true JPH0384893U (en) | 1991-08-28 |
Family
ID=31690832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14409689U Pending JPH0384893U (en) | 1989-12-15 | 1989-12-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0384893U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008118453A (en) * | 2006-11-06 | 2008-05-22 | Sanyo Electric Co Ltd | Video display |
| JP2022051164A (en) * | 2020-09-18 | 2022-03-31 | カシオ計算機株式会社 | Projection device, light emission control method, and program |
-
1989
- 1989-12-15 JP JP14409689U patent/JPH0384893U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008118453A (en) * | 2006-11-06 | 2008-05-22 | Sanyo Electric Co Ltd | Video display |
| JP2022051164A (en) * | 2020-09-18 | 2022-03-31 | カシオ計算機株式会社 | Projection device, light emission control method, and program |
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