Abstract: The present invention provides an optical sensor package assembly. The light shield is arranged in the groove of a package housing above the photosensitive chip. The connection wires between the substrate, the light emitting unit and the photosensitive chip can be printed or disposed on the surface of the substrate. Further, a distance between the photosensitive element and the chip edge is designed to reduce or avoid side leakage interference.

Abstract: The present invention proposes a chip reliability test assembly, which comprises a motherboard and a daughter board. The motherboard is used to support the chips during an aging acceleration process at high temperature. The daughter board is used to measure the electricity of chip after the aging acceleration process. Each chip holder is removable off the motherboard. The daughter board does not go through the aging acceleration process and can be reusable.

Abstract: 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.

Abstract: The present invention provides an adaptive proximity sensing device, which can adjust the lighting power of a light-emitting element according to the sensed intensity to extends the sensing range. Further, the device can normalize the final sensed intensity to return the normal sensed intensity. Moreover, the uses a linear model of the normal sensed intensity and the distance, so the device can quickly determine the distance of the object.

Abstract: 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.

Abstract: 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.

Abstract: The heart rate and blood oxygen monitoring device of the present invention utilizes two ambient light calibration DACs, which can quickly calibrate noise signals generated by ambient light. The heart rate and blood oxygen monitoring device can provide more accurate heart rate and blood oxygen values for optical measurement methods.

Abstract: The present invention provides a proximity sensing device with linear electrical offset calibration, which can record electrical offsets caused by different dark currents under different settings of the pulse count or the pulse time, and the proximity sensing device uses these electrical offsets to obtain the linear electrical offset ratio. Then calculate and infer the electrical offset generated in actual use through the linear electrical offset ratio to calibrate sensing signal.

Abstract: The present invention proposes a packaging structure that integrates distance sensing device and temperature sensing device, and it is applied to small wearable devices such as earphones or watches. The combination of distance and temperature sensing allows the wearable device to accurately determine whether it is on the user's body, and then start temperature monitoring. It can collect ear temperature information more effectively and energy-saving.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A device for verifying frequency of a clock signal generated from a clock signal generator includes a reference signal generator, a frequency divider and a comparative detector. A reference clock signal and a reset signal are provided by the reference signal generator. The frequency divider in communication with the reference signal generator and the clock signal generator receives and frequency-divides the clock signal into a bi-level divided clock signal in response to the reset signal. Then the comparative detector in communication with the frequency divider and the reference signal generator detects a level of the bi-level divided clock signal in response to the reset signal and the reference clock signal, and verifies frequency of the clock signal according to a period deviation range Te when the bi-level divided clock signal is detected to be a first level from the first to the (p?q)th detected points but a second level at the (p+1)th detected point.

Abstract: A device for verifying frequency of a clock signal generated from a clock signal generator includes a reference signal generator, a frequency divider and a comparative detector. A reference clock signal and a reset signal are provided by the reference signal generator. The frequency divider in communication with the reference signal generator and the clock signal generator receives and frequency-divides the clock signal into a bi-level divided clock signal in response to the reset signal. Then the comparative detector in communication with the frequency divider and the reference signal generator detects a level of the bi-level divided clock signal in response to the reset signal and the reference clock signal, and verifies frequency of the clock signal according to a period deviation range Te when the bi-level divided clock signal is detected to be a first level from the first to the (p−q)th detected points but a second level at the (p+1)th detected point.

Abstract: A circuit and a method for generating a variable delay clock without glitches are provided. A DLL clock output circuit comprises a selection circuit. A plurality of select signals selectively switch the corresponding clock delay lines to be the output signal by the selection circuit. Each of the select signals traverses through a delay switching circuit to adaptively delay the time points at which the select signals switch the clock delay lines to the output signal, so as to produce a glitchless variable delay clock signal.

Abstract: A circuit and a method for generating a variable delay clock without glitches are provided. A DLL clock output circuit comprises a selection circuit. A plurality of select signals selectively switch the corresponding clock delay lines to be the output signal by the selection circuit. Each of the select signals traverses through a delay switching circuit to adaptively delay the time points at which the select signals switch the clock delay lines to the output signal, so as to produce a glitchless variable delay clock signal.