18958336. DETECTION DEVICE (Japan Display Inc.)
DETECTION DEVICE
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Inventor(s)
DETECTION DEVICE
This abstract first appeared for US patent application 18958336 titled 'DETECTION DEVICE
Original Abstract Submitted
According to an aspect, a detection device includes: an optical sensor; a light source configured to emit light to the optical sensor; a detection signal amplifying circuit configured to convert a variation of current supplied from the optical sensor into a variation of voltage; and an analog-to-digital (A/D) conversion circuit configured to convert an output voltage signal after being converted into the voltage variation into a digital detection value. The A/D conversion circuit is configured to limit the detection value to a maximum digital gradation value or a minimum digital gradation value when the light source is off.