SENSED EHT LEVEL CONTROLS BRIGHTNESS, CONTRAST AND THEREFORE BEAM CURRENT

The invention provides an automatic brightness limiter having an amplification means to amplify the video signal and applying the image signal at the next stage and a contrast adjustment means to adjust the contrast of a screen through active components, the device comprising; control means which co...

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Bibliographic Details
Main Author KWANG-SEOK KIM
Format Patent
LanguageEnglish
Published 23.01.1991
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:The invention provides an automatic brightness limiter having an amplification means to amplify the video signal and applying the image signal at the next stage and a contrast adjustment means to adjust the contrast of a screen through active components, the device comprising; control means which controls automatically the image signal level and the contrast of the CRT by controlling the outputs of the amplification means and the contrast adjustment means using a high voltage applied to an anode through control components, and lied between the amplification means and the contrast adjustment means. Improving the capacity of the brightness adjustment for the screen of the automatic brightness limiter may be attained according to the present invention.
Bibliography:Application Number: GB19890015560