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Backlight brightness adjustment method and device

A technology of backlight brightness and adjustment method, applied to instruments, static indicators, etc., can solve problems such as inability to guarantee accuracy, long adjustment time, heavy workload, etc., achieve flexible disassembly, convenient and accurate brightness measurement, and enhance narrow viewing angle display effect of effect

Inactive Publication Date: 2018-04-20
KUSN INFOVISION OPTOELECTRONICS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The above adjustment process needs to be repeatedly manually adjusted, the adjustment time is long, the workload is heavy, and the accuracy cannot be guaranteed.

Method used

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  • Backlight brightness adjustment method and device
  • Backlight brightness adjustment method and device

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Embodiment Construction

[0026] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0027] It should be understood that in the description of the present invention, "known", "fixed", "given" and "predetermined" generally refer to a value, quantity, parameter, constraint, condition, state, process, The process, method, implementation, or various combinations are variable in theory, but if set in advance, they will remain unchanged in subsequent use. The terms "first", "second", etc. are used for descriptive purposes only and should not be construed...

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Abstract

The application discloses a backlight brightness adjustment method including that a microprocessor calculates a PWM duty cycle initial value and outputs the PWM duty cycle initial value to a backlightdriving module; respective PWM duty cycle values are stored in a flash memory; a brightness measurement device measures the actual brightness of a liquid crystal display panel; the PWM duty cycle values are automatically increased step by step based on the initial value; the microprocessor reconfigures the backlight driving module; and the best brightness is displayed on the liquid crystal display panel. A backlight brightness adjustment device disclosed in the application includes a keyboard, a microprocessor that automatically increase the values of the duty cycles step by step based on theinitial value; a backlight driving module; a flash memory; a liquid crystal display panel; a brightness measurement device, and a brightness sensor. The backlight brightness adjustment method and device can automatically measure and adjust the brightness, select the optimal value of the PWM duty cycle, gradually form a brightness gradient from the middle to both sides of the liquid crystal display panel, and enhance a narrow viewing angle display effect.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to an automatic adjustment method and an adjustment device for the brightness of multi-channel backlights. Background technique [0002] For liquid crystal displays with wide and narrow viewing angles, in order to increase the display effect, the current method is to divide the entire backlight panel into multiple areas vertically, and adjust the brightness of different areas. , which can increase the display effect of the narrow viewing angle. [0003] figure 1 It shows the working principle diagram of the method for adjusting the brightness of multiple backlights in the prior art to enhance the display effect. First, input the pulse width modulation duty cycle of each backlight drive through the keyboard, and the controller will output the corresponding pulse width modulation signal. The pulse width modulation signal is input to the corresponding backlight driver. Because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/3406G09G2320/0626
Inventor 杨在野季昕驰刘胜利乔向洋赵琦张春宇
Owner KUSN INFOVISION OPTOELECTRONICS
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