Light emission display drive method and drive apparatus

Details Light emission display drive method and drive apparatus Light emission display drive method and drive apparatus

2005-01-04

2005-01-04

Tran, Henry N. (Department: 2674)

Computer graphics processing and selective visual display system

Display driving control circuitry

Intensity or color driving control

C345S039000, C345S041000, C345S077000, C345S078000, C315S169300

Reexamination Certificate

active

06839069

ABSTRACT:
A light emission display drive apparatus used as a light emission display drive circuit includes an at least second-order ΔΣ modulator3for turning on/off a constant drive current or a constant drive voltage, thereby performing gradation control of each light emitting element. A pixel read section2reads the brightness value of each light emitting element in a predetermined period, the ΔΣ modulator3performs ΔΣ modulation in a predetermined period in response to the read brightness value, and an output change section36of the ΔΣ modulator performs operations of detecting unevenness of a list of output pulses of the ΔΣ modulation and dispersing the output pulses in the same light emitting element among light emitting elements, thereby performing multiple-step gradation control of the light emitting element.

REFERENCES:
patent: 5714968 (1998-02-01), Ikeda
patent: 5953002 (1999-09-01), Hirai et al.
patent: 6091398 (2000-07-01), Shigeta
patent: 6388678 (2002-05-01), Kasahara et al.
patent: 6465966 (2002-10-01), Konuma
patent: 20030095085 (2003-05-01), Abe

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