Mobile terminal and calibration method of distance sensor thereof

Abstract

The invention discloses a mobile terminal and a calibration method of a distance sensor thereof. The calibration method comprises the following steps of: judging whether the mobile terminal is in a handheld conversation attitude; if so, acquiring an effective value of a distance between the mobile terminal and the human face, which is detected by the distance sensor currently; and judging whether the effective value is greater than a set distance value, if not, storing the effective value and taking the effective value as a control threshold for controlling backlight of the mobile terminal to be turned on or off. According to the mobile terminal and the calibration method of the distance sensor thereof, the calibration precision of the distance sensor can be improved and the probability of turning on or off the backlight of the mobile terminal by mistake is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of mobile terminals, in particular to a calibration method for a mobile terminal and a distance sensor thereof. Background technique [0002] With the development of science and technology, the requirements for power loss of mobile terminals such as mobile phones are getting higher and higher. Reducing power loss as much as possible has become one of the development directions of mobile terminals, and the screen power loss of mobile terminals is the most important factor affecting mobile terminals. An important factor in power loss, especially when the screen is displayed for a long time, it consumes more power and even affects the life of the battery. Therefore, the power of the mobile terminal can be reduced by turning off the screen when the screen display is not required. [0003] In the mobile terminal, the distance sensor has become a standard built-in device of the mobile terminal. During a call on ...

AI Technical Summary

Problems solved by technology

However, in actual mobile terminal products, the intensity of the reflected infrared light obtained by the receiving device of the distance sensor cannot accurately obtain the distance of the reaction obstacle. The possible reasons are:

[0005] a. There is a consistency problem in the incoming material of the distance sensor, resulting in an error in the intensity of the received or emitted infrared light;

[0006] b. There is a problem of consistency in the light-transmitting sheet, and the difference in light transmittance will affect the intensity of the final received and emitted light;

[0007] c. In the production and assembly process of the lens and light-transmitting cover, it is easy to produce deviations and gaps, which affect the concentration of infrared light, and finally lead to errors in the readings of the receiving device

[0008] Therefore, based on the above-mentioned differences in mobile terminals and differences in gestures of different users, it is obviously inappropriate to use a fixed backlight threshold to control the display and shutdown of the screen of the mobile terminal. If there is a large error in the consistency between them, it may even cause the backlight to be turned off by mistake, thus affecting the user experience

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