PIXEL CIRCUIT OUTPUTTING PULSE WIDTH SIGNAL AND OPTICAL SENSOR USING THE SAME

There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second inter...

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Bibliographische Detailangaben
Hauptverfasser: LIU, HANI, KO, YI-HSIEN, LIU, RENIEH, WU, CHIH-HUAN
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.