Physiological detection device and method of operation thereof

Abstract

A physiological detection device includes a light source, an image sensor and a processing unit. The light source illuminates the skin surface in a burst pattern. The image sensor receives light emitted by skin tissue below the skin surface at a sampling frequency to sequentially generate image frames. The processing unit is used to control the light source and the image sensor, and calculate physiological characteristics according to the captured image frames when the light source is turned on. The physiological detection device saves overall energy consumption by adopting the burst mode.

Description

technical field [0001] The invention relates to a physiological detection, in particular to a physiological detection device and an operation method thereof which adopt a burst mode to reduce energy consumption. Background technique [0002] Since the wireless optical mouse does not have a signal line to connect to the host, its operation convenience is greatly improved, especially when it is used as an input device for a mobile computer, it gradually replaces the traditional wired mouse. However, a wireless optical mouse generally includes active components such as a light source, a digital signal processor (DSP), an image sensor, and a wireless transmission unit. The overall power consumption of the mouse is large, so the service life of the battery is insufficient. [0003] In order to solve this problem, it is known that the power consumption of the wireless optical mouse can be reduced by changing the image acquisition frequency and exposure time of the image sensor; ho...

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Problems solved by technology

However, a wireless optical mouse generally includes active components such as a light source, a digital signal processor (DSP), an image sensor, and a wireless transmission unit, and its overall power consumption is large, so it has the problem of insufficient battery life.

[0003] In order to solve this problem, it is known that the power consumption of the wireless optical mouse can be reduced by changing the image acquisition frequency and exposure time of the image sensor; however, in actual use, this method has at least the following problems: due to the exposure time of the image sensor It will change with the moving speed of the optical mouse, resulting in a large change in the overall brightness of the acquired image, and has poor stability

However, in this mode of operation, each light-emitting frequency still consumes different currents, for example, the current consumed by the high-speed mode can be three times that of the low-speed mode

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