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US 10,175,098 B2Granted
Optical sensing circuit having plural sensing components with current paths selectively established according to received colored light and display panel utilizing the same
AssigneeAu Optronics Corporation
InventorsChih-Lung Lin, Chia-En Wu, Po-Syun Chen, Fu-Hsing Chen, Ming-Xun Wang, Ching-En Lee, Po-Cheng Lai, Jian-Shen Yu
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Abstract
An optical sensing circuit has a plurality of optical sensing units arranged so that the optical sensing circuit is ambient light insensitive or sensitive to light within certain spectrum. The sensitive spectra corresponding to the plurality of optical sensing units are different from one another.
Claims18
An optical sensing circuit, comprising:
- a first sensing component, having a first end and a second end, wherein a first current path between the first end of the first sensing component and the second end of the first sensing component is selectively established according to whether the first sensing component receives first colored light;
- a capacitor, separately electrically connected to the first end of the first sensing component and a first voltage end;
- a sampling circuit, electrically connected to the first end of the first sensing component;
- a first ambient light sensing circuit, comprising:
- a second sensing component, having a first end and a second end, wherein the first end of the second sensing component is electrically connected to the second end of the first sensing component, and a second current path between the first end of the second sensing component and the second end of the second sensing component is selectively established according to whether the second sensing component receives the first colored light;
- and
- a third sensing component, having a first end and a second end, wherein the first end of the third sensing component is electrically connected to the second end of the first sensing component, the second end of the third sensing component is electrically connected to a voltage source, and a third current path between the first end of the third sensing component and the second end of the third sensing component is selectively established according to whether the third sensing component receives second colored light;
- and
- a second ambient light sensing circuit, separately electrically connected to the second end of the second sensing component, a first signal end, and the voltage source, and configured to electrically connect, in a sensing time interval, the first signal end to the second end of the second sensing component when the first colored light is sensed, and electrically connect the voltage source to the second end of the second sensing component when the second colored light is sensed, wherein
- in the sensing time interval, a voltage of the first signal end is different from a voltage of the voltage source.
7 more elements
An optical sensing circuit, comprising:
- a first sensing component, having a first end and a second end, wherein a first current path between the first end of the first sensing component and the second end of the first sensing component is selectively established according to whether the first sensing component receives first colored light;
- a capacitor, separately electrically connected to the first end of the first sensing component and a first voltage end;
- a sampling circuit, electrically connected to the first end of the first sensing component;
- a second sensing component, having a first end and a second end, wherein the first end of the second sensing component is electrically connected to the second end of the first sensing component, the second end of the second sensing component is electrically connected to a first signal end, and a second current path between the first end of the second sensing component and the second end of the second sensing component is selectively established according to whether the second sensing component receives second colored light;
- and
- a third sensing component, having a first end and a second end, wherein the first end of the third sensing component is electrically connected to the second end of the first sensing component, the second end of the third sensing component is electrically connected to a voltage source, and a third current path between the first end of the third sensing component and the second end of the third sensing component is selectively established according to whether the third sensing component receives third colored light.
3 more elements
Dependencies are inferred from the claim text.