Master cathode ray tube jig with LEDs simulating stray emissions for calibration of a stray emissions detection system and methods of making and using same
AssigneesSony Corporation, Sony Electronics Inc.
InventorsDavid Allen Murtishaw, Harry Savage
Life of this patent
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Abstract
A jig is used in place of a master Cathode Ray Tube (“CRT”) for calibrating a Stray Emissions Detection System (“SEDS”). Light Emitting Diodes (“LEDs”) are placed in the neck portion of a CRT, where the electron gun would normally be disposed, to form the test jig. These LEDs are activated during the calibration process to simulate the stray emissions that would be released through defects in a CRT. Because the number, pattern and light output of the LEDs can be controlled, and are not changed by the calibration procedure itself, the jig can be used to more reliably and effectively calibrate the SEDS for CRT manufacture.
Claims20
A jig for calibrating a stray emissions detection system, said jig comprising:
- a housing shaped as a cathode ray tube tested by said stray emissions detection system, said housing having a neck portion corresponding to a neck portion of said cathode ray tube;
- and
- at least one light source in said neck portion of said housing, said light source emitting light that simulates a stray emission from a cathode ray tube for detection by said stray emissions detection system.
A method of calibrating a stray emissions detection system using a jig, said method comprising:
- placing said jig in said stray emissions detection system;
- with said jig, emitting light which simulates stray emissions that said stray emissions detection system detects;
- and
- calibrating said stray emission detection system based on said system's response to said light emitted by said jig.
A jig for calibrating a stray emissions detection system, said jig comprising:
- a housing means;
- and
- light-emitting means with said housing means for emitting light that simulates stray emissions from a cathode ray tube for detection by said stray emissions detection system.
Dependencies are inferred from the claim text.