Display method for intermediate gray scale and display apparatus

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345 89, 345148, 348792, 348793, G09G 320

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058984143

ABSTRACT:
A display apparatus permitting high resolution and a large number of gray-scale levels and causing indiscernible flicker has been disclosed. One frame is divided into or composed of j subframes, and light is produced according to a luminance level predetermined subframe by subframe in order to express intermediate gray-scale of a picture. Emphasis is put on the fact that display to be performed during each subframe within one frame can be controlled independently. An interlaced-scanning display is carried out during k subframes associated with low-order weighted bits out of j subframes, and a noninterlaced-scanning display is carried out during the other j-k subframes associated with high-order weighted bits. The ratio of an addressing scan time to a subframe associated with a small weight is large, and the ratio of an addressing scan time to a whole frame is very large. If the addressing scan time can be reduced as mentioned above, a great effect would be exerted. Moreover, the luminance levels to be determined in relation to the subframes during which interlaced-scanning display is carried out are so low that the influence of the reduction on a whole picture is limited.

REFERENCES:
patent: 5436634 (1995-07-01), Kanazawa
patent: 5475448 (1995-12-01), Saegusa
patent: 5583527 (1996-12-01), Fujisaki et al.
patent: 5701135 (1997-12-01), Aratani et al.

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