JPS6455584A - Display controller - Google Patents
Display controllerInfo
- Publication number
- JPS6455584A JPS6455584A JP62211925A JP21192587A JPS6455584A JP S6455584 A JPS6455584 A JP S6455584A JP 62211925 A JP62211925 A JP 62211925A JP 21192587 A JP21192587 A JP 21192587A JP S6455584 A JPS6455584 A JP S6455584A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- hsd
- controlling
- msl
- width
- 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
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
PURPOSE: To prevent the edge disappearance of a display screen by providing the display controller with a control means for controlling the signal width of a synchronizing signal generated by a synchronizing signal generating circuit by an external signal. CONSTITUTION: An N output QHD corresponding to a reference signal. and an output DPD from a NOT gate 13 are inputted to a shift register 10 and the signals are sent from the QH and QF of the register 10 to a selector 11. The selector 11 receives an external signal MSL and sends a logic reset signal HRS. The signal HRS is converted into a control signal CHD for controlling the signal width of a horizontal synchronizing signal through a 2nd flip flop(FF) 7, a 3rd FF 8 and a NAND gate 9 and the signal CHD is converted into a horizontal synchronizing signal HSD through an AND gate 12. Thus time from the fall of the signal HSD up to the rise of a display signal KDP can be controlled by changing the width of the signal HSD by the signal MSL. Consequently the edge disappearance of a CRT screen can be corrected by controlling the signal MSL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211925A JPS6455584A (en) | 1987-08-26 | 1987-08-26 | Display controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211925A JPS6455584A (en) | 1987-08-26 | 1987-08-26 | Display controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455584A true JPS6455584A (en) | 1989-03-02 |
Family
ID=16613942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62211925A Pending JPS6455584A (en) | 1987-08-26 | 1987-08-26 | Display controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455584A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110830742A (en) * | 2019-12-02 | 2020-02-21 | 锐捷网络股份有限公司 | Method and device for eliminating VGA signal jitter |
-
1987
- 1987-08-26 JP JP62211925A patent/JPS6455584A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110830742A (en) * | 2019-12-02 | 2020-02-21 | 锐捷网络股份有限公司 | Method and device for eliminating VGA signal jitter |
CN110830742B (en) * | 2019-12-02 | 2021-12-17 | 锐捷网络股份有限公司 | Method and device for eliminating VGA signal jitter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1198657A (en) | An Arrangement for Application of Text in Television Transmission. | |
JPS6455584A (en) | Display controller | |
GB1243594A (en) | Improvements in or relating to automatic frequency controlled oscillators | |
JPS5359185A (en) | Remote control signal system | |
GB1380965A (en) | System for asynchronous automatic control | |
JPS6453682A (en) | Phase locked signal generator | |
JPS5741734A (en) | Crt controlling system | |
JPS56144689A (en) | Digital convergence device | |
JPS5620388A (en) | Picture display unit | |
JPS6441391A (en) | Noise reduction circuit for color television signal | |
JPS57123543A (en) | Mode display device | |
JPS6467080A (en) | Superimposing circuit | |
JPS6428682A (en) | Display device for instrumentation | |
JPS6441380A (en) | Picture signal processor | |
JPS57164344A (en) | Retrial control system for electronic computer | |
JPS57155635A (en) | Semiconductor circuit | |
JPS544524A (en) | Acc circuit | |
JPS5428667A (en) | Calendar correcting mechanism | |
JPS5746192A (en) | Electronic watch with accelerating incremental correction switch | |
JPS54144123A (en) | Pattern generator | |
JPS6429190A (en) | Image adjustment pattern production device | |
JPS5783170A (en) | Inverter controller | |
JPS5622981A (en) | Electronic watch | |
JPS5499556A (en) | Malfunction preventing circuit for up-down counter | |
JPS5599858A (en) | Signal processing circuit |