Anti-overexposure circuit structure and electronic device using the same
AssigneesLite-On Electronics (Guangzhou) Limited, Lite-On Technology Corporation
InventorsShou-Te Wei, Wei-Chih Chen
Life of this patent
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Abstract
An anti-overexposure circuit structure and an electronic device using the same are provided. An anti-overexposure circuit structure includes a first capacitor, a second capacitor, a photo diode, a first switch and a control circuit. The photo diode is coupled to the first capacitor and the second capacitor. The first switch is serially connected to the photo diode. The control circuit is coupled to the first switch and configured to: control the first switch to be turned off when SOC of the first capacitor or SOC of the second capacitor the SOC is lower than a predetermined level. As a result, it can prevent pixel unit of the electronic device from being overexposed.
Claims14
An anti-overexposure circuit structure, comprising:
- a first capacitor;
- a second capacitor;
- a photo diode coupled to the first capacitor and the second capacitor;
- a first switch serially connected to the photo diode;
- and
- a control circuit coupled to the first switch and configured to:
- control the first switch to be at an open circuit state when state of charge (SOC) of the first capacitor or SOC of the second capacitor is lower than a predetermined level.
Dependencies are inferred from the claim text.