Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-11-12
2000-10-03
Mengistu, Amare
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 89, G09G 328
Patent
active
061279919
ABSTRACT:
There is proposed is a method of controlling a flat panel display apparatus for multi-gradation display in which a data determination portion and a subfield control portion are provided. Based on a most significant bit or an upper bit of original image data, it is determined in which one of two or more divided gradation groups the original image data is included, to select a combination of subfields in accordance with a gradation-brightness characteristic of the belonging gradation group. Using a complementary relationship with human visibility, a difference in brightness between the gradations in a low-order brightness region is reduced, and a difference in brightness between the gradations in a high-order brightness region is enlarged. Therefore, a density of brightness is uniformly recognized visually over all the brightness regions, and a good quality of display can be obtained.
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patent: 5394194 (1995-02-01), Izawa et al.
patent: 5757343 (1998-05-01), Nagakubo
Kitagawa Makoto
Kobayashi Mitsugu
Tsutsui Yusuke
Uehara Hisao
Frenel Vanel
Mengistu Amare
Sanyo Electric Co,. Ltd.
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