KR980004274A - Vertical Synchronization Signal Generation Circuit - Google Patents
Vertical Synchronization Signal Generation Circuit Download PDFInfo
- Publication number
- KR980004274A KR980004274A KR1019960023495A KR19960023495A KR980004274A KR 980004274 A KR980004274 A KR 980004274A KR 1019960023495 A KR1019960023495 A KR 1019960023495A KR 19960023495 A KR19960023495 A KR 19960023495A KR 980004274 A KR980004274 A KR 980004274A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- display enable
- pixel clock
- enable signal
- delayed
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
- G09G1/08—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
본 발명은 커서기능이 추가된 RAMDAC에 관한 것으로서, 특히 CRT 콘트롤러로부터 인가되는 벨도의 포트를 통해 수직동기신호를 입력하지 않고, RAMDAC 내부에서 디스플레이 인에이블신호와 하소클럭을 이용하여 자체적으로 수직동기신호를 발생할 수 있는 수직동기신호 발생회로에 관한 것이다.The present invention relates to a RAMDAC to which a cursor function is added. In particular, the vertical synchronization signal is automatically inputted using a display enable signal and a calcined clock in the RAMDAC without inputting a vertical synchronization signal through a port of Beldo applied from a CRT controller. A vertical synchronous signal generating circuit capable of generating a signal.
본 발명의 수직동기신호 발생회로는 외부로부터 화소클럭신호에 의해 외부로부터 인가되는 디스플레이 인에이블신호를 일정시간동안 순차적으로 딜레이시켜 제1딜레이된 디스플레이 인에이블신호 내지 제3딜레이된 디스플레이이 인에이블신호를 딜레이부로부터 제1내지 제3딜레이된 디스플레이 인에이블신호를 입력하여 리세트신호를 발생하는 리세트신호 발생부와, 외부로부터 인가되는 화소클럭신호를 카운트하여 소정의 출력신호를 출력하고 상기 리세트신호 발생부의 리세트신호에 의해 리세트되는 화소클럭 카운팅부와, 화소클럭 카운팅부의 출력과, 디스플레이 인에이블신호 딜레이부로부터 제1 및 제3딜레이된 디스플레이 인에이블신호 그리고 화소클럭신호를 입력하고, 화소클럭 카운팅부가 화소클럭을 카운팅하여 소정값이 되면 그 다음 화소클럭신호가 인가될 때 수직동기신호를 발생하는 수직동기신호 발생부를 포함한다.The vertical synchronous signal generating circuit of the present invention sequentially delays the display enable signal applied from the outside by a pixel clock signal from the outside for a predetermined time, so that the first delayed display enable signal to the third delayed display receive the enable signal. A reset signal generator for inputting the first to third delayed display enable signals from the delay unit to generate a reset signal, and counting pixel clock signals applied from the outside to output a predetermined output signal, and reset the reset signal generator; A pixel clock counting unit reset by the reset signal of the signal generating unit, an output of the pixel clock counting unit, a display enable signal and a pixel clock signal that are first and third delayed from the display enable signal delay unit; If the pixel clock counting unit counts the pixel clock and reaches a predetermined value, When the pixel clock signal is applied and including a vertical synchronizing signal generator for generating a vertical synchronization signal.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제2도는 본 발명의 실시예에 따른 수직동기신호 발생회로의 블록도.2 is a block diagram of a vertical synchronization signal generating circuit according to an embodiment of the present invention.
제3도는 제2도에 도시된 본 발명의 수직동기신호 발생회로에 있어서, 디스플레이 인에이블부의 상세도.3 is a detailed view of a display enable unit in the vertical synchronous signal generating circuit of the present invention shown in FIG.
제4도는 제2도에 도시된 본 발명의 수직동기신호 발생회로에 있어서, 리세트신호 발생부의 상세도.4 is a detailed view of a reset signal generator in the vertical synchronous signal generator of the present invention shown in FIG.
제5도는 제2도에 도시된 본 발명의 수직동기신호 발생회로에 있어서, 화소클럭 카운팅부의 상세도.5 is a detailed view of a pixel clock counting unit in the vertical synchronization signal generating circuit of the present invention shown in FIG.
제6도는 제2도에 도시된 본 발명의 수직동기신호 발생회로에 있어서, 수직동기신호 발생부의 상세도.6 is a detailed view of a vertical synchronous signal generator in the vertical synchronous signal generator of the present invention shown in FIG.
제7a-f는 제2도의 수직동기신호 발생회로의 동작 타이밍도.7A-F are operation timing diagrams of the vertical synchronous signal generation circuit of FIG.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960023495A KR100203057B1 (en) | 1996-06-25 | 1996-06-25 | Vertical synchronous signal generation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960023495A KR100203057B1 (en) | 1996-06-25 | 1996-06-25 | Vertical synchronous signal generation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
KR980004274A true KR980004274A (en) | 1998-03-30 |
KR100203057B1 KR100203057B1 (en) | 1999-06-15 |
Family
ID=19463243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960023495A KR100203057B1 (en) | 1996-06-25 | 1996-06-25 | Vertical synchronous signal generation circuit |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100203057B1 (en) |
-
1996
- 1996-06-25 KR KR1019960023495A patent/KR100203057B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR100203057B1 (en) | 1999-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR970049573A (en) | Clock generation circuit for data output buffer of synchronous DRAM device | |
KR850003479A (en) | Semiconductor integrated circuit | |
KR980004274A (en) | Vertical Synchronization Signal Generation Circuit | |
KR970056906A (en) | Pseudo-synchronous signal generation circuit of digital image processing device | |
KR960030069A (en) | Apparatus and method for effective display center display of liquid crystal display device | |
KR0158645B1 (en) | A priority detection circuit in the data enable mode of liquid crystal display device | |
KR100201291B1 (en) | Horizontal line clock and horizontal starting signal generation circuit for liquid crystal display driving | |
KR900005789A (en) | Clock signal generator and its method | |
KR940010507A (en) | Burst Gate Pulse Generator Circuit | |
KR930005643B1 (en) | One short circuit having constant pulse width | |
KR910008966A (en) | Horizontal synchronous pulse measuring circuit | |
KR100200345B1 (en) | Vertical synchronous signal detector and positive polarity signal generator | |
KR970029302A (en) | Mode automatic detection circuit of liquid crystal display | |
KR0186058B1 (en) | Synchronous clock generating circuit | |
JP2545010B2 (en) | Gate device | |
KR980006918A (en) | 50% Duty Cycle Data Generator (50% Duty Cycle Data Generator) | |
KR940017870A (en) | Window signal generator | |
KR960010187B1 (en) | Clamp signal delaying circuit | |
KR970022649A (en) | Clamp Pulse Generation Circuit | |
KR100429861B1 (en) | Device of generating precharge signal for static memory of on screen display system, especially in relation to guaranteeing an operation of a synchronous static memory even though an asynchronous-type horizontal synchronous signal is inputted to a clock generator of an on screen display system | |
JPS63316569A (en) | Synchronizing device | |
JP2000092034A (en) | Counter interface | |
KR960020350A (en) | Horizontal Synchronous Pulse Separation Circuit | |
JPH0271638A (en) | Timing signal generator | |
KR19980049739U (en) | Clamp Signal Processing Circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20070228 Year of fee payment: 9 |
|
LAPS | Lapse due to unpaid annual fee |