LED driver

Details LED driver LED driver

2006-09-29

2010-02-09

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S291000

Reexamination Certificate

active

07659672

ABSTRACT:
The present invention provides a flexible light emitter driver circuit which adjusts the luminance of the light emitter diodes (LED) by a manual input signal. The light emitter driver circuit comprises a Duty Ratio Change Logic, a PWM Generate and Control Logic, an oscillator, and a gate driver. The Duty Ratio Change Logic adjusts the duty cycle of the output signal according to the manual input signal. The PWM Generate and Control Logic generates a PWM signal according to the output signal to control the current of the LED, thus adjusts the luminance of the LED. The present invention further provides a highly flexible display system that comprises a light emitter driver circuit which can adjust the LED luminance by manual input signal.

REFERENCES:
patent: 7049752 (2006-05-01), Tani
patent: 7071630 (2006-07-01), York
patent: 7138786 (2006-11-01), Ishigaki et al.
patent: 7262588 (2007-08-01), Matsuo et al.
patent: 2007/0115662 (2007-05-01), Roberts et al.
patent: 2007/0229001 (2007-10-01), McIntosh et al.
patent: 2452246 (2001-10-01), None

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