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US 2023/0102603 A1Published application
Adaptive proximity sensing device
AssigneeLuxsentek Microelectronics Corp.
InventorsCHEN-HUA HSI, CHAO-YANG HSIAO, SHENG-CHENG LEE, WEN-SHENG LIN, CHIH-WEI LIN, YUEH-HUNG HOU
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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.
Claims11
An adaptive proximity sensing device, comprising:
- a light-emitting element configured to emit a detection light with a lighting power, wherein the light-emitting element is driven by a driver, and the driver uses a pulse width or a pulse intensity to set the lighting power;
- a photosensitive element configured to convert a reflected light of an object into a light-sensing analog signal;
- an analog-to-digital converter (ADC) configured to convert the light-sensing analog signal to a light-sensing digital signal;
- and
- a digital processor configured to control the driver to adjust the lighting power according to a sensed intensity calculated by the light-sensing digital signal, wherein the digital processor decreases the lighting power if the sensed intensity is higher than a high threshold or increases the lighting power if the sensed intensity is lower than a low threshold till the lighting power falls in between the low threshold and the high threshold to get a modulated intensity.
2 more elements
An adaptive proximity sensing device, comprising:
- a light-emitting element configured to emit a detection light with a lighting power, wherein the light-emitting element is driven by a driver, and the driver uses a pulse width or a pulse intensity to set the lighting power;
- a photosensitive element configured to convert a reflected light of an object into a light-sensing analog signal;
- an analog-to-digital converter (ADC) configured to convert the light-sensing analog signal to a light-sensing digital signal;
- and
- a digital processor configured to control the driver to adjust the lighting power according to a sensed intensity calculated by the light-sensing digital signal, wherein the digital processor adjusts the lighting power by an adjustment ratio to get a modulated intensity if the sensed intensity is higher than a high threshold or lower than a low threshold, and the adjustment ratio is a ratio of a default modulated intensity to the sensed intensity, and the default modulated intensity is between the high threshold and the low threshold.
2 more elements
A distance sensor, comprising
- a light-emitting element configured to emit a detection light with a lighting power, wherein the light-emitting element is driven by a driver, and the driver uses a pulse width or a pulse intensity to set the lighting power;
- a photosensitive element configured to convert a reflected light of an object into a light-sensing analog signal;
- an analog-to-digital converter (ADC) configured to convert the light-sensing analog signal to a light-sensing digital signal;
- and
- a digital processor configured to control the driver to adjust the lighting power according to a sensed intensity calculated by the light-sensing digital signal, wherein the digital processor
- adjusts the lighting power by an adjustment ratio to get a modulated intensity if the sensed intensity is higher than a high threshold or lower than a low threshold, wherein the adjustment ratio is a ratio of a default modulated intensity to the sensed intensity, and the default modulated intensity is between the high threshold and the low threshold,
- calculates a normal intensity according to the adjustment ratio and the modulated intensity, and
- determines a distance of the object according the normal intensity.
5 more elements
Dependencies are inferred from the claim text.