Obtaining backlight brightness and its data processing method, device, and liquid crystal display device
A data processing device, a technology of backlight brightness, applied in static indicators, instruments, etc., can solve the problems of brightness data difference, large difference, inaccurate brightness data, etc., to improve stability, time stability, and backlight brightness data. stable effect
Active Publication Date: 2019-12-31
HISENSE VISUAL TECH CO LTD
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Although the sampling integration time T of the luminance data of the light sensing device 105 S0 and T S1 are equal, but the on and off times of the backlight module 102 corresponding to each sampling integration time are different, resulting in the sampling integration time T S0 and T S1 Within, there are differences in the brightness data read by the light sensing device 105
In this way, the brightness data obtained by the brightness data processor 106 for a certain number of times has a large difference, resulting in inaccurate current brightness data of the backlight module 102 calculated. If the current brightness data is different from the target brightness data, the brightness data The adjustment of the duty cycle of the PWM dimming signal provided by the PWM controller 104 by the processor 106 is also inaccurate, which causes the brightness of the backlight source of the backlight module 102 to become more unstable.
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[0024] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0025] image 3 It is a flow chart of a method for acquiring backlight brightness according to an exemplary embodiment. The method is applied to liquid crystal display devices with built-in light sensing devices. Such as image 3 As shown, the method includes:
[0026] Step 201, receiving a PWM dimming signal sent by a PWM controller.
[0027] Specifically, a PWM (Pulse Width Modulation, pu...
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The present invention relates to the technical field of display, and discloses a method for obtaining and processing backlight brightness data, and a liquid crystal display device. The method comprises: receiving a PWM dimming signal sent by a PWM controller (201); determining whether the received PWM dimming signal comprises preset hopping or not (202); if the PWM dimming signal comprises the preset hopping, sending a reading instruction to an optical sensor unit within the set time after the preset hopping (203); and receiving backlight brightness data obtained by the optical sensor unit according to the reading instruction (204). The solution achieves the purpose of improving the stability of the backlight brightness data.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a method and device for acquiring backlight brightness and data processing thereof, and a liquid crystal display device. Background technique [0002] Existing display devices are required to display image content more and more accurately, and to achieve accurate display of image content on a display device, it is necessary to ensure that the brightness of the display device is stable. [0003] Such as figure 1 As shown, the existing display device includes: a display component 101 , a backlight module 102 , a backlight driving device 103 , a PWM (Pulse Width Modulation, pulse width modulation) controller 104 , a light sensing device 105 and a brightness data processor 106 . Wherein, the display component 101 is used for receiving and displaying images. The backlight module 102 is used to provide a backlight for the display component 101 so that the display component 101 can d...
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IPC IPC(8): G09G3/36
CPCG09G3/36G09G2320/062G09G3/3406
Inventor 骆俊谕洪胜峰刘明涛
Owner HISENSE VISUAL TECH CO LTD