JPS6473882A - Convergence adjusting circuit - Google Patents
Convergence adjusting circuitInfo
- Publication number
- JPS6473882A JPS6473882A JP62230194A JP23019487A JPS6473882A JP S6473882 A JPS6473882 A JP S6473882A JP 62230194 A JP62230194 A JP 62230194A JP 23019487 A JP23019487 A JP 23019487A JP S6473882 A JPS6473882 A JP S6473882A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- function waveform
- distortion correction
- cubic function
- distortion
- 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
- 238000012888 cubic function Methods 0.000 abstract 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 2
- 238000012886 linear function Methods 0.000 abstract 1
- 238000012887 quadratic function Methods 0.000 abstract 1
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
PURPOSE:To sufficiently correct vertical bobbin winder distortion, by including a cubic function waveform signal in a distortion correction signal in a convergence correction circuit which corrects the distortion of a projecting image by supplying the distortion correction signal to a vertical or a horizontal deflection means in the picture tube of a projection type color display. CONSTITUTION:A cubic function waveform generation circuit 78 integrates the horizontal parabolic signal C of a quadratic function waveform. Thereby, the cubic function waveform signal of cubic function waveform is obtained by removing a linear function waveform component by a horizontal sawtooth wave signal (b), and it is supplied to a vertical bobbin winder distortion correction signal generation circuit 79. And at the vertical bobbin winder distortion correction signal generation circuit 79, the distortion correction signal can be obtained by multiplying the cubic function waveform signal by a vertical sawtooth wave signal (a) by a multiplier 99. In such a way, the curvature of the cubic function waveform signal can be changed corresponding to the position of a scanning beam in a vertical direction. Therefore, by superposing the cubic function waveform signal on an on-going distortion correction signal, it is possible to perform the distortion correction of the sensible change of the vertical bobbin winder distortion on a projection tube with accuracy higher than ever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62230194A JPS6473882A (en) | 1987-09-14 | 1987-09-14 | Convergence adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62230194A JPS6473882A (en) | 1987-09-14 | 1987-09-14 | Convergence adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473882A true JPS6473882A (en) | 1989-03-20 |
Family
ID=16904060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62230194A Pending JPS6473882A (en) | 1987-09-14 | 1987-09-14 | Convergence adjusting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473882A (en) |
-
1987
- 1987-09-14 JP JP62230194A patent/JPS6473882A/en active Pending
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