Luxsentek Microelectronics Corp.

Chen-Hua Hsi

Chih-Wei Lin

Sheng-Cheng Lee

Wen-Sheng Lin

Yueh-Hung Ho

The present invention provides a light sensor with dark current elimination. A dark current from a covered photodiode and a sensed current from a photodiode are respectively transformed to a dark voltage and a sensed voltage by a controlled integration circuit. A reverse capacitor receives the dark voltage and the sensed voltage to cancel out for each other, and outputs a corrected sensing voltage.

Light sensor with dark current elimination having duo switch-capacitor circuits and a reverse capacitor

This invention provides an earphone with a low light transmittance and a non-porous sensor cover. Covering the sensing cover on the proximity sensing device can reduce the interference of most of the ambient light and improve measurement accuracy.

Earphone with proximity sensing function

The present invention provides a proximity sensing device, which comprises an ambient light calibration digital-to-analog converter and at least one crosstalk calibration digital-to-analog converters. The proximity sensing device is able to quickly generate calibration parameters for the interference caused by the ambient list and crosstalk caused by different reflection, to calibrate the sensed signals to avoid wrong judgments.

Proximity sensing device

The present invention provides a photosensor device with temperature compensation, which can adjust or calibrate the number, time and power of luminescence of light emitting elements under different ambient temperatures, so that the light signal values received by the photosensor device can be kept consistent or within the error range, there are multiple applications.

Photosensor device

The present invention provides a photosensor device, which can cancel a dark current in 1-2 milliseconds. This photosensor device utilizes a small capacitor to quickly accumulate and transform the dark current to a dark-current voltage. Based on the dark-current voltage and an environment temperature, a calibration voltage can be obtained. By cancelling the calibration voltage from the sensed voltage to get a light voltage, which can be amplified to a lux signal. The process is very quick and sensitive, so the photosensor device can be used in an environment under a low luminance.

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Taipei, Taiwan

Chen-Hua Hsi