Method for adjusting screen brightness and processor
A screen brightness and processor technology, applied in the electronic field, can solve the problems of increasing the cost of mobile terminals and increasing the internal space of mobile terminals, and achieve the effects of saving internal space, increasing speed, and reducing costs
Inactive Publication Date: 2015-12-23
深圳电器公司
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Problems solved by technology
However, if the embedded controller is used to realize the function of adjusting the brightness of the LCD screen, the motherboard of the mobile terminal needs to be able to support the embedded controller and meet the relevant standards for power management of the embedded controller, which limits the type of motherboard of the mobile terminal; If a single-chip microcomputer is used to realize the function of adjusting the brightness of the LCD screen, an additional single-chip microcomputer that supports the function of adjusting the brightness of the LCD screen needs to be added on the main board of the mobile terminal, which increases the internal space of the mobile terminal and increases the cost of the mobile terminal
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[0047] 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.
[0048] By adopting the embodiment of the present invention, the brightness of the screen can be adjusted only when the main board is connected with the key module.
[0049] The terms "first", "second", "third", "fourth", "A", "B" and "C" in the description and claims of the present invention and the above-mentioned drawings are used for Distinguishing between different objects, not used to describe a specific order. Furthermore, the terms "include" an...
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The invention provides a method for adjusting screen brightness. The method comprises the steps that a processor obtains an on-off state of a preset pin, the on-off state of the preset pin is triggered by a key module according to detected pressing signals, the pressing signals are used for adjusting the screen brightness, and a mainboard where the processor is located is connected with the key module through the preset pin; the processor determines duty cycle of pulse width modulation (PWM) signals output by a brightness adjusting module according to the on-off state of the preset pin, and the brightness adjusting module is connected with the mainboard where the processor is located; and the processor controls the brightness adjusting module to adjust the screen brightness according to the determined duty cycle of the PWM signals. The embodiment of the invention further discloses the processor. By adopting the method, the screen brightness can be adjusted under the conditions that only the mainboard is connected with the key module.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a method and a processor for adjusting screen brightness. Background technique [0002] In order to meet the user's demand for the brightness displayed on the liquid crystal screen, the mobile terminal usually has a function of adjusting the brightness of the liquid crystal screen, and adjusts the liquid crystal screen to the brightness required by the user according to the user's selection. In the prior art, an embedded controller or a single-chip microcomputer is usually used to realize the function of adjusting the brightness of the liquid crystal screen, and the brightness of the liquid crystal screen is adjusted correspondingly by triggering the brightness control button. However, if the embedded controller is used to realize the function of adjusting the brightness of the LCD screen, the motherboard of the mobile terminal needs to be able to support the embedded control...
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Inventor 张建民吴旭付长洲郑耀辉侯元全汤智
Owner 深圳电器公司