G - Physics – 09 – G
Patent
G - Physics
09
G
G09G 3/36 (2006.01)
Patent
CA 2176367
A method of addressing a liquid crystal pixel which has a varying switching threshold (1, 3) over its area comprises blanking the pixel by means of a blanking pulse (6), switching on part (10) of the area of the pixel by means of a second pulse (8) and then switching off a part (14) of the area (10) which was switched on by the second pulse (8) by means of a third pulse (12). The amount (14) of the pixel switched off by the third pulse has the same temperature dependence as the amount (10) switched on by the second, thus compensating for any change in brightness or grey level which would otherwise occur.
L'invention se rapporte à un procédé d'adressage d'un pixel de cristal liquide présentant sur sa surface un seuil de commutation variant (1, 3), ce procédé consistant à supprimer le pixel au moyen d'une impulsion (6) de suppression, à rendre passante une partie (10) de la surface du pixel au moyen d'une seconde impulsion (8), puis au moyen d'une troisième impulsion (12), à rendre non passante une partie (14) de la surface (10) rendue passante par la seconde impulsion (8). La quantité (14) de surface du pixel rendue non passante par la troisième impulsion présente la même dépendance de température que la quantité (10) de surface rendue passante par la seconde impulsion, compensant ainsi tout changement de brillance ou d'échelle de gris qui pourrait alors survenir.
Central Research Laboratories Limited
Ridout & Maybee Llp
LandOfFree
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