JPS6472668A - Signal generator - Google Patents
Signal generatorInfo
- Publication number
- JPS6472668A JPS6472668A JP62227571A JP22757187A JPS6472668A JP S6472668 A JPS6472668 A JP S6472668A JP 62227571 A JP62227571 A JP 62227571A JP 22757187 A JP22757187 A JP 22757187A JP S6472668 A JPS6472668 A JP S6472668A
- Authority
- JP
- Japan
- Prior art keywords
- analogue
- value information
- line drawing
- signal
- high speed
- 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)
- Studio Circuits (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To display a clear line drawing even if a video signal having acute rise and fall is generated and very high speed drawing is executed by making surface drawing value information and line drawing value information into analogue and generating a synthesized signal in a switching circuit which executes a high speed switching action. CONSTITUTION:A first digital-analogue converter 13 which makes surface drawing value information into analogue, a second digitalanalogue converter 14 which makes line drawing value information into analogue, and the switching circuit 15 switching a surface drawing signal and a line drawing signal both of which have respectively been made into analogue in the first and second digital-analogue converters 13 and 14 at high speed based on line drawing timing information overlapping a screen drawing with a line drawing. Next, the video signal having acute rise and fall is generated. Thus, screen drawing value information and line drawing value information are respectively made into analogue, and the synthesized signal where the surface drawing is overlapped with the line drawing by the switching action of the switching circuit which operates at high speed, whereby a signal which can examine the display of high definition and the like can be generated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227571A JPS6472668A (en) | 1987-09-12 | 1987-09-12 | Signal generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227571A JPS6472668A (en) | 1987-09-12 | 1987-09-12 | Signal generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6472668A true JPS6472668A (en) | 1989-03-17 |
Family
ID=16863000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62227571A Pending JPS6472668A (en) | 1987-09-12 | 1987-09-12 | Signal generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6472668A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5972872A (en) * | 1982-10-20 | 1984-04-24 | Toshiba Corp | Signal switching device |
JPS61283283A (en) * | 1985-06-10 | 1986-12-13 | Matsushita Electric Ind Co Ltd | On-screen display device |
JPS63114472A (en) * | 1986-10-31 | 1988-05-19 | Victor Co Of Japan Ltd | Picture processor |
-
1987
- 1987-09-12 JP JP62227571A patent/JPS6472668A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5972872A (en) * | 1982-10-20 | 1984-04-24 | Toshiba Corp | Signal switching device |
JPS61283283A (en) * | 1985-06-10 | 1986-12-13 | Matsushita Electric Ind Co Ltd | On-screen display device |
JPS63114472A (en) * | 1986-10-31 | 1988-05-19 | Victor Co Of Japan Ltd | Picture processor |
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