TW377540B - Polarity changing apparatus of video signal and method of changing the same - Google Patents
Polarity changing apparatus of video signal and method of changing the sameInfo
- Publication number
- TW377540B TW377540B TW087111817A TW87111817A TW377540B TW 377540 B TW377540 B TW 377540B TW 087111817 A TW087111817 A TW 087111817A TW 87111817 A TW87111817 A TW 87111817A TW 377540 B TW377540 B TW 377540B
- Authority
- TW
- Taiwan
- Prior art keywords
- polarity
- changing
- video signal
- same
- circuit
- Prior art date
Links
Landscapes
- Transforming Electric Information Into Light Information (AREA)
Abstract
This invention is about a polarity changing apparatus of video signals and the method of changing the same, which includes synchronous division circuit and frequency counter circuit. The polarity changing circuit receives the first video signal and changes the polarity according to the control signal for receiving the second video signal. The synchronous division circuit intercepts and separates the second synchronous video signal, and the frequency counter circuit determines the polarity of said video signal and sends out control signals to change the polarity when it detects that the quality of existing polarity is not as expected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW087111817A TW377540B (en) | 1998-07-20 | 1998-07-20 | Polarity changing apparatus of video signal and method of changing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW087111817A TW377540B (en) | 1998-07-20 | 1998-07-20 | Polarity changing apparatus of video signal and method of changing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
TW377540B true TW377540B (en) | 1999-12-21 |
Family
ID=57942098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW087111817A TW377540B (en) | 1998-07-20 | 1998-07-20 | Polarity changing apparatus of video signal and method of changing the same |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW377540B (en) |
-
1998
- 1998-07-20 TW TW087111817A patent/TW377540B/en not_active IP Right Cessation
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Legal Events
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MK4A | Expiration of patent term of an invention patent |