JPS6461174A - Correction circuit for uneven picture quality of cathode-ray tube - Google Patents
Correction circuit for uneven picture quality of cathode-ray tubeInfo
- Publication number
- JPS6461174A JPS6461174A JP4979588A JP4979588A JPS6461174A JP S6461174 A JPS6461174 A JP S6461174A JP 4979588 A JP4979588 A JP 4979588A JP 4979588 A JP4979588 A JP 4979588A JP S6461174 A JPS6461174 A JP S6461174A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- output
- picture quality
- cathode
- 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.)
- Granted
Links
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To obtain uniform picture quality on the entire screen by providing the 1st and 2nd voltage generating circuits generating respectively a voltage of a parabolic waveform synchronously with horizontal deflection and vertical deflection, an adder circuit adding the output voltage and a drive circuit dividing the added output to supply the result to the 2nd grid. CONSTITUTION:Voltage generating circuits 1, 2 generate a parabolic waveform voltage whose voltage is increased toward the circumference of the screen synchronously with horizontal deflection and vertical deflection. An adder circuit 3 adds voltages outputted from the circuits 1, 2. The added output is fed to a drive circuit 6 via an amplifier circuit 4. The circuit 6 divides the output of the circuit 4 to give the resulting voltage to the 2nd grid G2 controlling the spot diameter and brightness. Thus, the spot diameter is reduced as the beam goes to the circumference part and the brightness is increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63049795A JP2591778B2 (en) | 1988-03-04 | 1988-03-04 | Image quality correction circuit for CRT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63049795A JP2591778B2 (en) | 1988-03-04 | 1988-03-04 | Image quality correction circuit for CRT |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6461174A true JPS6461174A (en) | 1989-03-08 |
JP2591778B2 JP2591778B2 (en) | 1997-03-19 |
Family
ID=12841085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63049795A Expired - Lifetime JP2591778B2 (en) | 1988-03-04 | 1988-03-04 | Image quality correction circuit for CRT |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2591778B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0651564A1 (en) * | 1993-10-28 | 1995-05-03 | Matsushita Electric Industrial Co., Ltd. | Amplifying circuit for dynamic focus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63133436A (en) * | 1986-11-23 | 1988-06-06 | Sony Corp | Cathode-ray tube |
JPS63159968U (en) * | 1987-04-07 | 1988-10-19 |
-
1988
- 1988-03-04 JP JP63049795A patent/JP2591778B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63133436A (en) * | 1986-11-23 | 1988-06-06 | Sony Corp | Cathode-ray tube |
JPS63159968U (en) * | 1987-04-07 | 1988-10-19 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0651564A1 (en) * | 1993-10-28 | 1995-05-03 | Matsushita Electric Industrial Co., Ltd. | Amplifying circuit for dynamic focus |
US5534757A (en) * | 1993-10-28 | 1996-07-09 | Matsushita Electric Industrial Co., Ltd. | Amplifying circuit for dynamic focus |
Also Published As
Publication number | Publication date |
---|---|
JP2591778B2 (en) | 1997-03-19 |
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