LED driver circuit having temperature compensation

Details LED driver circuit having temperature compensation LED driver circuit having temperature compensation

2007-10-23

2007-10-23

Vo, Tuyet (Department: 2821)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S212000, C345S214000, C345S082000, C345S084000, C315S309000, C315S307000, C315S291000, C315S312000

Reexamination Certificate

active

11302734

ABSTRACT:
A LED driver circuit is provided for controlling the brightness of a LED. A control circuit is used for generating a LED current in accordance with a resistor. The control circuit is further coupled to detect a LED voltage for adjusting the LED current in reference to the LED voltage. The value of the LED voltage is correlated to the LED temperature. Therefore, the LED current is then programmed in accordance with the LED temperature.

REFERENCES:
patent: 6239716 (2001-05-01), Pross et al.
patent: 6841947 (2005-01-01), Berg-johansen
patent: 2006/0022916 (2006-02-01), Aiello
patent: 2006/0043911 (2006-03-01), Shao et al.

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