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Class Information
Number: 348/813
Name: Television > Video display > Cathode-ray tube > Color tv > One electron beam supplying more than one color > Beam position indicating > Photoelectric sensor
Description: Subject matter including a photoelectric device positioned to detect the light output produced by the beam.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6958785 |
Method and apparatus for determining and correcting for illumination variations in a digital projector |
Oct. 25, 2005 |
| 6707509 |
Method for adjusting convergence in a projection television receiver |
Mar. 16, 2004 |
| 6568812 |
System for mounting infrared receiver behind mirror in rear projection television applications |
May. 27, 2003 |
| 6538705 |
Image projecting system |
Mar. 25, 2003 |
| 6222593 |
Image projecting system |
Apr. 24, 2001 |
| 6108612 |
Coded objects and methods for detecting such coded objects |
Aug. 22, 2000 |
| 5883476 |
Convergence correction system with recovery function and display apparatus using the same |
Mar. 16, 1999 |
| 5694003 |
Plural gun color CRT with inclined index phosphor layers |
Dec. 2, 1997 |
| 5432404 |
Apparatus for detecting a geometric distortion of an image on a display device |
Jul. 11, 1995 |
| 5428269 |
Methods and apparatus for improving cathode ray tube image quality |
Jun. 27, 1995 |
| 5343119 |
Index type CRT having a photosensor with a function of amplifier |
Aug. 30, 1994 |
| 5291102 |
Dynamic color separation display |
Mar. 1, 1994 |
| 5111110 |
Method of determining a display parameter in a picture display tube and method of improving a picture display in a picture display tube |
May. 5, 1992 |
| 4920410 |
Drive method for synchronizing scanning and modulation of flat-configuration color CRT |
Apr. 24, 1990 |
| 4896082 |
Raster distortion correction circuit |
Jan. 23, 1990 |
| 4814669 |
Method of determining the position of an electron beam in a shadow mask display tube |
Mar. 21, 1989 |
| 4812713 |
Automatic closed loop scaling and drift correcting system and method |
Mar. 14, 1989 |
| 4749907 |
Method and apparatus for automatically calibrating a graticuled cathode ray tube |
Jun. 7, 1988 |
| 4703231 |
Flat type image display tube and display device using the same |
Oct. 27, 1987 |
| 4694221 |
Device for the restitution and/or analyzing of color images using line-type fiber optics cathode ray tube |
Sep. 15, 1987 |
| 4677340 |
Method and apparatus for calibrating deflection in an oscilloscope |
Jun. 30, 1987 |
| 4658288 |
Beam index system with switchable memories |
Apr. 14, 1987 |
| 4651197 |
Beam index system having two distinct levels of index video signal |
Mar. 17, 1987 |
| 4642529 |
Apparatus and method for measuring linewidth and convergence in a color cathode ray tube display system |
Feb. 10, 1987 |
| 4636843 |
Deflection control apparatus for a beam index color television receiver |
Jan. 13, 1987 |
| 4625153 |
Sensor system for television picture tubes |
Nov. 25, 1986 |
| 4617495 |
Autoconvergence of a cathode ray tube using a semiconductor detector |
Oct. 14, 1986 |
| 4459512 |
Cathode-ray display tube for color printers |
Jul. 10, 1984 |
| 4364083 |
Beam index type color television receiver |
Dec. 14, 1982 |
| 4352047 |
Side pincushion correcting circuit for color television receivers |
Sep. 28, 1982 |
| 4316216 |
Beam index color television receiver |
Feb. 16, 1982 |
| 4314179 |
Horizontal scanning rate correction apparatus |
Feb. 2, 1982 |
| 4287531 |
Deflection control apparatus for a beam index color cathode ray tube |
Sep. 1, 1981 |
| 4263614 |
Phase tracking loop circuit |
Apr. 21, 1981 |
| 4261010 |
Beam index color television receiver apparatus |
Apr. 7, 1981 |
| 4259687 |
Beam index color cathode ray tube |
Mar. 31, 1981 |
| 4251832 |
Index signal amplifier for use in a beam index television receiver |
Feb. 17, 1981 |
| 4232332 |
Color television receiver |
Nov. 4, 1980 |
| 4231060 |
Color-pulling compensation in a beam-index display tube |
Oct. 28, 1980 |
| 4223344 |
Beam index color cathode ray tube |
Sep. 16, 1980 |
| 4212030 |
Beam index color cathode ray tube |
Jul. 8, 1980 |
| 4194140 |
Beam-indexing color image-presentation cathode ray tube |
Mar. 18, 1980 |
| 4003082 |
Color television system employing index signal generating means |
Jan. 11, 1977 |
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