JPS6430376A - Channel selection display circuit for television - Google Patents
Channel selection display circuit for televisionInfo
- Publication number
- JPS6430376A JPS6430376A JP62186942A JP18694287A JPS6430376A JP S6430376 A JPS6430376 A JP S6430376A JP 62186942 A JP62186942 A JP 62186942A JP 18694287 A JP18694287 A JP 18694287A JP S6430376 A JPS6430376 A JP S6430376A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- signal
- channel selection
- circuit
- display
- 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 generate always one piece of channel display bar image even if the number of the horizontal picture elements of an image display is modified by detecting the coincidence between an output from an updown counter that counts clock signals from a channel selection control circuit and an output from the clock signal counter of a timing generation circuit. CONSTITUTION:The following are provided; the channel selection control circuit 10 to generate a clock signal at the time of channel selection, the updown counter 11 to count clock signals, a D/A converter 12 to convert a digital output signal from the counter 11 to a DC voltage, an electronic tuner 1, and a synchronizing separator circuit 5 to take out a synchronizing signal 15 from a video signal 14. Also the following are provided; the timing generation circuit 6, a counter 8 which counts clock signal 17 from the circuit 6 and is reset by a reset signal 18, and a channel selection display and superimposing circuit 3 that superimposes an output from a coincidence detection circuit 9 that detects the coincidence between an output from the counter 11 and that from the counter 8 as a selected channel display signal 19 on said video signal 14. As a result, even when the number of the horizontal picture elements of an image display is modified, the frequency division ratio of a clock signal inputted to a counter for selected channel display does not need to be changed, and always one piece of channel selection display bar picture element is generated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62186942A JPS6430376A (en) | 1987-07-27 | 1987-07-27 | Channel selection display circuit for television |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62186942A JPS6430376A (en) | 1987-07-27 | 1987-07-27 | Channel selection display circuit for television |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6430376A true JPS6430376A (en) | 1989-02-01 |
Family
ID=16197420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62186942A Pending JPS6430376A (en) | 1987-07-27 | 1987-07-27 | Channel selection display circuit for television |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6430376A (en) |
-
1987
- 1987-07-27 JP JP62186942A patent/JPS6430376A/en active Pending
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