JPS6461189A - Raster position measuring device - Google Patents
Raster position measuring deviceInfo
- Publication number
- JPS6461189A JPS6461189A JP62217546A JP21754687A JPS6461189A JP S6461189 A JPS6461189 A JP S6461189A JP 62217546 A JP62217546 A JP 62217546A JP 21754687 A JP21754687 A JP 21754687A JP S6461189 A JPS6461189 A JP S6461189A
- Authority
- JP
- Japan
- Prior art keywords
- measured pattern
- difference
- brightness difference
- fed
- test signal
- 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
- Transforming Electric Information Into Light Information (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To eliminate variance in measurement due to individual difference by arranging plural circular light sensors on a television display screen and obtaining a raster position from an output signal of the light sensor by calculation thereby measuring highly accurate measurement in comparison with visual observation. CONSTITUTION:For example, 15 sets of light sensors 1 are arranged to a transmission type screen 2 of a projection type color television receiver. A test signal from a test signal generating circuit 9 is fed to a receiver and, a measured pattern including a border formed by a brightness difference in a detection area of the sensor 1, the measured pattern inverted with P1, P3 in the relation of brightness difference and the measured pattern without border formed by the brightness difference are generated. The deviation of the center of the light sensor 1 and the center line of the measured pattern is calculated from the difference from black and white level areas in the detection area and the area of the white level only, the calculated registration adjusting component is fed to a motor controller 12 to drive an adjusting variable resistor 15 via a drive circuit 13 and a pulse motor 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217546A JP2615659B2 (en) | 1987-08-31 | 1987-08-31 | Raster position measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217546A JP2615659B2 (en) | 1987-08-31 | 1987-08-31 | Raster position measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6461189A true JPS6461189A (en) | 1989-03-08 |
| JP2615659B2 JP2615659B2 (en) | 1997-06-04 |
Family
ID=16705950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62217546A Expired - Fee Related JP2615659B2 (en) | 1987-08-31 | 1987-08-31 | Raster position measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2615659B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997024883A1 (en) * | 1995-12-27 | 1997-07-10 | Tci Corporation | Crt inspection device |
| CN104360567A (en) * | 2014-10-11 | 2015-02-18 | 苏州合欣美电子科技有限公司 | Projection brightness adjustment method of adaptive projection system |
-
1987
- 1987-08-31 JP JP62217546A patent/JP2615659B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997024883A1 (en) * | 1995-12-27 | 1997-07-10 | Tci Corporation | Crt inspection device |
| CN104360567A (en) * | 2014-10-11 | 2015-02-18 | 苏州合欣美电子科技有限公司 | Projection brightness adjustment method of adaptive projection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2615659B2 (en) | 1997-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |