Patent ID: 9313853
Filing Date: 2016-04-12
CPC Classification: G09G,H05B

Claim Text:
1. A method comprising: providing an input signal identifying a desired brightness for one or more light emitting diodes (LEDs) to first and second control paths, which generate respectively, a digital modulation control signal and a current control signal; for a range of lower LED brightness values, generating the digital modulation control signal using the first control path, including adjusting the digital modulation control signal while maintaining the current control signal at a substantially constant value; for a range of higher LED brightness values, generating the current control signal using the second control path, including adjusting the current control signal while maintaining the digital modulation control signal within a range of maximum values; and driving the one or more LEDs according to the desired brightness, including transitioning between the digital modulation and current control signals based on LED brightness values.