Driving method and apparatus for light emitting device

Details Driving method and apparatus for light emitting device Driving method and apparatus for light emitting device

1996-10-02

2000-02-01

Chow, Dennis-Doon

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345147, G09G 332

Patent

active

060208651

ABSTRACT:
Driving method and apparatus for a light emitting device have a simple configuration and are able to change the luminance even when a light emitting device which operates at a low speed is employed. The apparatus includes power supplies numbering n each generating different output, switches numbering n to turn the outputs of the power supplies on/off and an adder to add the outputs from the switches and drive the light emitting device. The control information to control the n switches for each divided section obtained by dividing a lighting period by k is stored in the control information storing part and the control information for each divided section is read out to turn on/off the n switches.

REFERENCES:
patent: 3742483 (1973-06-01), Ogle
patent: 5619228 (1997-04-01), Doherty

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