Patent ID: 6909238
Filing Date: 2005-06-21
Classification: G09G

Abstract:
1. A back-lighted control and protection device for LCD (Liquid Crystal Display) which comprises a light source and a drive circuitry generating a high-voltage supply to said light source for illuminating a backplate of the LCD, wherein said back-lighted control and protection device comprises: a light source detection unit for detecting a light intensity of said light source, wherein said light source detection unit sends out a cut off signal when said light source detection unit detects said light intensity of said light source below a predetermined light level; and a protection circuit electrically communicating with said light source detection unit and arranged in such a manner that when said protection circuit receives said cut off signal from said light source detection unit, said protection circuit is arranged for simultaneously deactivating said drive circuitry to cut off said high-voltage supply to said light source.