JPS5460826A - Definition improving circuit - Google Patents
Definition improving circuitInfo
- Publication number
- JPS5460826A JPS5460826A JP12777577A JP12777577A JPS5460826A JP S5460826 A JPS5460826 A JP S5460826A JP 12777577 A JP12777577 A JP 12777577A JP 12777577 A JP12777577 A JP 12777577A JP S5460826 A JPS5460826 A JP S5460826A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- supplied
- output
- video signal
- luminance level
- 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 secure the assured improvement of the definition for the TV picture regardless of the luminance level and the scale of the variation of the luminance level, by controlling the preshoot and the overshoot in accordance with the scale of the luminance level and its variation of the video signal.
CONSTITUTION: The video signal supplied through input terminal 1 is supplied to secondary differentiating circuit 3, and the output of circuit 3 is supplied to variable gain inverse amplifier circuit 4. Then the output of circuit 4 is supplied to rectifier circuit 6, and the negative part of the output is drawn out to be supplied to compounder 7. At the same time, the video signal from terminal 1 is applied to compounder 7 via non-inverse amplifier circuit 10 and the series circuit of phase shift circuit 11 for phase compensation, and the output of 7 is applied to primary differential waveform converter circuit 14 to control electron beam scanning velocity modulation means G4 provided to CRT. In this constitution, the higher the luminance level of the video signal, the higher the absolute value level of the preshoot and the overshoot is supplied to waveform converter circuit 2. Thus, modulation means G4 is controlled via circuit 14 and according to the output of compounder 7
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12777577A JPS5460826A (en) | 1977-10-25 | 1977-10-25 | Definition improving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12777577A JPS5460826A (en) | 1977-10-25 | 1977-10-25 | Definition improving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5460826A true JPS5460826A (en) | 1979-05-16 |
Family
ID=14968375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12777577A Pending JPS5460826A (en) | 1977-10-25 | 1977-10-25 | Definition improving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5460826A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61154070U (en) * | 1985-03-14 | 1986-09-24 |
-
1977
- 1977-10-25 JP JP12777577A patent/JPS5460826A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61154070U (en) * | 1985-03-14 | 1986-09-24 |
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