Ambient Light Sensor
AssigneeSensortek Technology Corp.
InventorYu-Min Lin
Life of this patent
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Abstract
An ambient light sensor comprising at least three main channel sensing units and at least one cooperative channel sensing unit. Each main channel sensing unit includes a filter and a photosensitive element, with the filter positioned on the light receiving path of the photosensitive element, wherein the filter of at least one main channel sensing unit is an absorptive filter. Each cooperative channel sensing unit includes a filter and a photosensitive element, with the filter positioned on the light receiving path of the photosensitive element, wherein the filter of at least one cooperative channel sensing unit is an interference filter. This configuration effectively controls the error range of spectral reproduction results in ambient light sensor products affected by process variations, thereby improving product yield.
Claims12
An ambient light sensor, comprising:
- at least three main channel sensing units, each of the at least three main channel sensing units comprising a first filter and a first photosensitive element, the first filter disposed on a light-receiving path of the first photosensitive element, wherein the first filter of at least one of the at least three main channel sensing units is an absorptive filter;
- and
- at least one cooperative channel sensing unit, the at least one cooperative channel sensing unit comprising a second filter and a second photosensitive element, the second filter disposed on a light-receiving path of the second photosensitive element, wherein the second filter of at least one of the at least one cooperative channel sensing unit is an interference filter.
Dependencies are inferred from the claim text.