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Distance sensor, control method thereof and mobile terminal

A distance sensor and induced voltage technology, applied in the terminal field, can solve problems affecting user experience and light spots on the screen 3, and achieve the effects of improving detection capabilities, avoiding light spots, and reducing power density

Pending Publication Date: 2021-10-12
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the transmitting part 1 and the receiving part 2 of the distance sensor are both located under the screen 3, so that the infrared light emitted by the distance sensor needs to pass through the screen 3 to propagate to the obstacle 4, and the thermal effect will cause light spots to appear on the screen 3 , which affects the user experience

Method used

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  • Distance sensor, control method thereof and mobile terminal
  • Distance sensor, control method thereof and mobile terminal
  • Distance sensor, control method thereof and mobile terminal

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Embodiment Construction

[0024] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0025] "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. Words like "comprising" or "comprising" mean that the elements preceding the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements. "Up", "Down" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] In the p...

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Abstract

The invention discloses a distance sensor, a control method thereof and a mobile terminal. The distance sensor comprises a receiving part, wherein the receiving part comprises a photodiode, and the photodiode generates an induced voltage when receiving an optical signal; and a voltage-multiplying module connected with the photodiode to realize voltage-multiplying boosting of the induced voltage generated by the photodiode. According to the distance sensor provided by the invention, the voltage-multiplying module is additionally arranged on the receiving part, so that voltage-multiplying boosting of the induced voltage generated by the photodiode is realized, the receiving part can detect weak optical signals, and the detection capability of the receiving part of the distance sensor is improved. In other words, weak infrared light emitted by an emitting part can be detected by the receiving part, so that the power density of the infrared light at an emitting window is reduced by properly reducing the power of the infrared light emitted by the emitting part, the brightness of the infrared light irradiated on a screen is reduced, and the light spot problem is avoided.

Description

technical field [0001] The present application relates to the technical field of terminals, in particular to a distance sensor, a control method thereof, and a mobile terminal. Background technique [0002] Distance sensors are widely used in mobile terminals such as mobile phones and tablet computers, which measure the distance between the mobile terminal and obstacles through infrared rays. Specifically, the distance sensor includes two components, a transmitting component and a receiving component. When the distance sensor is in working condition, the transmitting part emits infrared light, and the infrared light is reflected when encountering an obstacle outside the screen and then received by the receiving part. Since infrared light has loss during propagation, and its loss increases with the increase of propagation distance, the receiving part can judge the propagation distance of infrared light according to the received light intensity, and then calculate the distanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/02H04M1/72454H04W52/02H04W52/14
CPCH04M1/026H04W52/0254H04W52/146Y02D30/70
Inventor 李垒
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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