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LED dimming circuit, chip, wearable device and LED dimming method

A dimming circuit and dimming technology, used in electrical components, medical science, sensors, etc., can solve the problems of low LED dimming efficiency, and achieve the effect of self-adaptive adjustment and improvement of LED dimming efficiency.

Pending Publication Date: 2022-02-18
CHIPSEA TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an LED dimming circuit, a chip wearable device and a dimming method to solve the technical problem of low LED dimming efficiency in the prior art

Method used

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  • LED dimming circuit, chip, wearable device and LED dimming method
  • LED dimming circuit, chip, wearable device and LED dimming method
  • LED dimming circuit, chip, wearable device and LED dimming method

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] The LED dimming circuit 100 provided by the present invention can be applied in such as figure 1 In the shown wearable device 200, the wearable device 200 includes a transmitting circuit 21 and a receiving circuit 22, wherein the transmitting circuit 21 includes an LED and an LED driving circuit 211 that drives the LED to emit light according to a preset dimming control signal The LED light shoots to the skin, and is reflected through the skin t...

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Abstract

The invention provides an LED dimming circuit, a chip, wearable equipment and an LED dimming method, and aims to solve the technical problem of low LED dimming efficiency in the prior art. According to the LED dimming circuit, the chip, the wearable equipment and the LED dimming method, a first optical digital code value is received, the first optical digital code value is compared with a preset target threshold range, whether the dimming control signal of the LED driving circuit needs to be adjusted and the dimming information when adjustment is needed or not is determined according to the comparison result, the current dimming control signal is adjusted according to the dimming information, and the adjusted dimming control signal is sent to the LED driving circuit; and through the above mode, the intensity of the light signal formed by superposing the light emitted by the LED and the ambient light is controlled within the detection range corresponding to the target threshold range, so that adaptive adjustment of the dimming control signal is realized, and the LED dimming efficiency is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of electronic equipment, in particular to an LED dimming circuit, a chip, a wearable device and a dimming method. Background technique [0002] At present, the main way for wearable devices to measure heart rate and blood oxygen saturation is to extract heart rate characteristics and blood oxygen saturation characteristics from PPG (PhotoPlethysmoGraphy, photoplethysmography) signals, and then according to the extracted heart rate characteristics and blood oxygen saturation The degree feature is further calculated to obtain heart rate and blood oxygen saturation. The main principle of measuring heart rate and blood oxygen saturation by PPG signal is that monochromatic LED (Light-emitting diode, light-emitting diode) light shoots to the skin, and the LED reflected light reflected back through the skin tissue is received by the photosensitive sensor and converted into an electrical signal and then It is con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/10H05B45/30A61B5/00A61B5/024A61B5/1455
CPCH05B45/10H05B45/30A61B5/14551A61B5/02416A61B5/6802Y02B20/40
Inventor 何晨光庞盼刘欢周百柯秦晨钟
Owner CHIPSEA TECH SHENZHEN CO LTD
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