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Class Information
Number: 348/377
Name: Television > Cathode-ray tube display excessive voltage control
Description: Subject matter including a device to prevent the occurrence of high electrical potential which may damage the cathode-ray tube.

Sub-classes under this class:

Class Number Class Name Patents
348/378 With disabling 48

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
7950029 Method for interactive television using foveal properties of the eyes of individual and grouped users and for protecting video information against the unauthorized access, dissemination and us May. 24, 2011
7663663 Burn-in control Feb. 16, 2010
7468663 Building security system Dec. 23, 2008
7187414 Circuit for stabilizing high tension voltage of CRT, and method thereof Mar. 6, 2007
7030908 Method and circuit for spot-killer control in cathode-ray tube Apr. 18, 2006
6937288 Beam current limiting circuit for use in a video projector Aug. 30, 2005
6897900 Display apparatus comprising a cathode ray tube (CRT) May. 24, 2005
6888575 Digital cut-off control loop for TV using speeding and blanking circuits May. 3, 2005
6744429 Abnormal operation prevention circuit for display device and method for operating the same Jun. 1, 2004
6636265 Focus flutter prevention in TV receivers and monitors Oct. 21, 2003
6563496 Cut-off adjusting apparatus May. 13, 2003
6563495 Automatic screen saver May. 13, 2003
6549246 Method for driving projection cathode ray tube Apr. 15, 2003
6545717 Display system having selectable automatic CRT cutoff stabilization or AKB with CRT feedback current simulation Apr. 8, 2003
6473078 Method and device for power consumption management of an integrated display unit Oct. 29, 2002
6433827 Measurement-free G2 calibration of color picture tubes Aug. 13, 2002
6392695 Image display device May. 21, 2002
6323915 Method and apparatus to enhance a border area of a display Nov. 27, 2001
6313878 Method and structure for providing an automatic hardware-implemented screen-saver function to a display product Nov. 6, 2001
6285401 Apparatus for suppressing overshoots in kinescope beam current measurement pulses Sep. 4, 2001
6211908 Television apparatus with supplementary kinescope blanking and spot burn protection circuitry Apr. 3, 2001
6188435 Circuit for controlling beam current in a picture tube Feb. 13, 2001
6091454 Method and apparatus for displaying images having adjacent horizontal blocks with sharp contrast on a display unit of a television system Jul. 18, 2000
6064581 High voltage transformer May. 16, 2000
6057883 Circuit for controlling the picture tube in a television receiver May. 2, 2000
6034729 Monitor protection system Mar. 7, 2000
5889558 Variable black level bias image display Mar. 30, 1999
5883669 Display device using electron beam and method of erasing display screen Mar. 16, 1999
5682083 Spot removing circuit for a CRT with grid control means Oct. 28, 1997
5677730 Spot elimination circuit for a cathode ray tube Oct. 14, 1997
5671016 High voltage discharge circuit for CRT Sep. 23, 1997
5430596 CRT protector circuit Jul. 4, 1995
5394188 High voltage stabilizing circuit for use in color television receivers Feb. 28, 1995
5353187 Safety circuits for a television receiver Oct. 4, 1994
5313294 Beam current limiting arrangement having a peak amplitude, responsive threshold May. 17, 1994
5304898 High voltage generating circuit Apr. 19, 1994
5270823 Run/standby control with switched mode power supply Dec. 14, 1993
4939429 High voltage regulator circuit for picture tube Jul. 3, 1990
4905116 X-radiation protection circuit Feb. 27, 1990
4885509 High voltage generating apparatus for supplying high voltage to cathode ray tube Dec. 5, 1989
4845410 Low cost, high speed, high voltage flyback regulator circuit Jul. 4, 1989
4841406 X-radiation protection circuit Jun. 20, 1989
4831311 High voltage stabilizing circuit for prevention of overheating May. 16, 1989
4814672 Circuitry for limiting an operating voltage obtained by way of a rectifier from a secondary winding of a transformer Mar. 21, 1989
4812719 High voltage regulator in a television apparatus Mar. 14, 1989
4812720 High voltage stabilization circuit for video display apparatus Mar. 14, 1989
4788618 High voltage protecting circuit Nov. 29, 1988
4769714 Noise and arc suppression filter for a display driver stage Sep. 6, 1988
4767694 Method of preparing a blanket with reserved spaces utilizing photocopying procedure Aug. 30, 1988
4737851 On/off control circuitry for television Apr. 12, 1988

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