JPS5446431A - Display unit with dark bright function - Google Patents
Display unit with dark bright functionInfo
- Publication number
- JPS5446431A JPS5446431A JP11365177A JP11365177A JPS5446431A JP S5446431 A JPS5446431 A JP S5446431A JP 11365177 A JP11365177 A JP 11365177A JP 11365177 A JP11365177 A JP 11365177A JP S5446431 A JPS5446431 A JP S5446431A
- Authority
- JP
- Japan
- Prior art keywords
- display
- screen
- dark
- picture
- dark bright
- 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
Abstract
PURPOSE: To realize dark bright display easily, by varying a refresh frequency according to the assignment of the dark bright bit of display information.
CONSTITUTION: Screen memory 16 refreshes the screen, video signal generating circuit 100 extracts a picture from screen memory 16 to generate a video signal for the display screen, and picture display 300 is achieved according to the output of the circuit 100. Here, the number of times of refreshing at the position on the screen assigned by the indication of dark register 18 assigning the position dark light is decreased at a preset rate by the frequency obtained by increasing or decreasing the original oscillation frequency from main clock 12 by horizontal scanning frequency counter 13, vertical scanning counter 14, and divider circuit 17. Conwequently, the dark bright display can be realized eaily by varying the brightness of the display at the assigned position of a picture
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11365177A JPS5446431A (en) | 1977-09-20 | 1977-09-20 | Display unit with dark bright function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11365177A JPS5446431A (en) | 1977-09-20 | 1977-09-20 | Display unit with dark bright function |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5446431A true JPS5446431A (en) | 1979-04-12 |
Family
ID=14617661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11365177A Pending JPS5446431A (en) | 1977-09-20 | 1977-09-20 | Display unit with dark bright function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5446431A (en) |
-
1977
- 1977-09-20 JP JP11365177A patent/JPS5446431A/en active Pending
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