Title: Driver system of memory type gray-scale display panel

Abstract: A driver system of a display panel including a matrix of luminescent elements with a bi-stable operation condition comprises a circuit arrangement for combining a plurality of divided lighting periods to provide a gray-scale display and a circuit arrangement for increasing or decreasing the respective widths of the divided lighting periods in correlation with each other, whereby a control of luminance with gray-scale is provided.

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Other info:

Inventors: Mizushima, Masashi (Hachioji, JP)

Application Number: 875798
Filing Date: 1978-02-07
Publication_date: 1980-03-11
Assignee: Hitachi, Ltd. (JP)
Primary Class(es): 348/800 345/77, 345/78, 365/111
Other Classes:
US Patent Ref:

3627924	Dec, 1971	Fleming et al.	358/241.
3740570	Jun, 1973	Kaelin et al.	358/241.
3761617	Sep, 1973	Tsuchiya et al.	358/241.

Other Refs:
Primary Examiner: Richardson, Robert L.
Assistant Examiner:
Attorney: Craig and Antonelli