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US 11,432,381 B1Granted
Photosensor device
AssigneeLuxsentek Microelectronics Corp.
InventorsSheng-Cheng Lee, Wen-Sheng Lin, Chih-Wei Lin, Chen-Hua Hsi
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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.
Claims10
A photosensor device, comprising:
- a control module;
- a one-cycle-clock ADC connected to the control module;
- a light emitting module, comprising a light emitting element and a driver, the driver is coupled between the light-emitting element and the control module, wherein the driver receives a light control signal from the control module to drive the light emitting element to emit a detection light;
- a thermal tracking table unit connected with control module, and the thermal tracking table unit is configured to store a temperature/power table of the light-emitting element;
- a temperature sensing unit connected to the one-cycle-clock ADC through a first switch unit, and the temperature sensing unit is configured to sense and convert an ambient temperature to a temperature sensing signal;
- a light receiving module configured to receive a reflection light of the detection light from the object and to generate a light sensing signal;
- and
- an analog front-end module coupled between the light receiving module and the one-cycle-clock ADC, and the analog front-end module is configured to receive and convert the light sensing signal to a light analog signal;
- wherein
- the one-cycle-clock ADC is configured to receive and convert the light analog signal and the temperature sensing signal to a light digital signal and a temperature digital signal, and output the light digital signal and the temperature digital signal to the control module;
- and
- the control module connects to the first switch unit for switching the first switch unit to close or open.
9 more elements
Dependencies are inferred from the claim text.