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US 8,786,213 B2Granted
Compensating LED current by LED characteristics for LED dimming control
AssigneeRichtek Technology Corporation
InventorsShei-Chie Yang, Shui-Mu Lin, Jun-Sheng Cheng, Ming-Yu Lin, Chun-I Lin
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Abstract
LED dimming control circuit and method compensate LED current or LED average current by LED characteristics to improve dimming efficiency and performance. LED characteristic related look-up tables are stored to provide compensation values, and input LED current setting information is compensated by the compensation values to generate corrected LED current setting information for determining LED brightness.
Claims21
A LED dimming control circuit comprising:
- a register configured to receive and store a first LED current setting information;
- a storage unit connected to the register, configured to store a LED characteristic related look-up table and provide compensation values according to the first LED current setting information and the look-up table;
- and
- a compensator connected to the register and the storage unit, configured to compensate the first LED current setting information according to the compensation values to generate a second LED current setting information for determining LED brightness.
1 more element
A LED dimming control method comprising:
- receiving and storing a first LED current setting information;
- providing compensation values according to the first LED current setting information and a LED characteristic related look-up table;
- and
- compensating the first LED current setting information according to the compensation values to generate a second LED current setting information for determining LED brightness.
1 more element
Dependencies are inferred from the claim text.