Method for and device controlling screen backlight unit switch of portable electronic device

Abstract

The invention provides a method for controlling the switching of a screen backlight unit for a portable electronic device, and a device thereof. When a system starts in the electronic device, if a microprocessing unit judges that no arbitrary key is touched, the system enters the power-saving mode, and the screen backlight unit is cut off; if the microprocessing unit judges that the arbitrary key is touched, the system enters the operation mode, and the screen backlight unit is continued to be lit up; then the microprocessing unit judges whether the stand-by time of the device exceeds the threshold value or not, and if the stand-by time of the device does not exceed the threshold value, the screen backlight unit is continued to be lit up; if the stand-by time of the device exceeds the threshold value, an image acquisition unit is started to acquire an image positioned in front of the image acquisition unit, and if the face characteristics exist in the image by the algorithm, the screen backlight unit of the screen is continued to be lit up; and if no face characteristic exists in the image by judgement, the system enters the power-saving mode, the screen backlight unit of the screen is close to reduce the power consumption.

Description

technical field [0001] The invention relates to a portable electronic device, in particular to a method and device for controlling the switch of a screen backlight unit of the portable electronic device. Background technique [0002] The backlight module is one of the indispensable components of the liquid crystal display panel (LCD panel). Since the liquid crystal itself does not emit light, the function of the backlight module is to supply sufficient brightness and evenly distributed light source, so that it can display normally. image. At present, the common backlight modules can be divided into two types: front light and back light. The backlight can be classified according to the size of the lamp and the position of the light tube. The developed structures include: side Edge lighting structure, bottom lighting structure and hollow structure. Among them, the edge lighting structure is the most widely used, because the light source is a single light source placed on the...

AI Technical Summary

Problems solved by technology

However, when the user concentrates on reading the information on the device and does not take any action beyond the time for turning off the screen backlight bulb, the backlight bulb will automatically turn off. At this time, the user must press any key or touch the screen to turn on the backlight bulb , which will interfere with the user's reading behavior; and continuously turning on the camera module to detect the brightness of the external enviro

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