Patent ID: 9239261
Filing Date: 2016-01-19
CPC Classification: G01J

Claim Text:
1. An ambient light sensing device, comprising: at least one pixel, receiving a plurality of exposures having different exposure time durations to sense different dynamic ranges, the exposures including an exposure of a first dynamic range (Rx) and an exposure of a second dynamic range (Ry), wherein Ry is larger than Rx; a read out circuit, reading the exposures and generating corresponding digital codes; and a combination unit, combining the digital codes to generate a code combination indicating the result of ambient light detection, wherein the code combination has a higher resolution than each of the digital codes, wherein the code combination includes a first digital code corresponding to the exposure of a first dynamic range and a second digital code corresponding to the exposure in the difference range, and in a two-dimensional coordinate system in which the horizontal axis is the dynamic ranges and the vertical axis is the digital codes, the first digital code connects the second digital code, wherein both the first digital code and the second digital code are not multiplied by any weighting, or the first digital code is not multiplied by any weighting whereas the second digital code is multiplied by a weighting.