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Backlight driving method and backlight module as well as television
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A technology of backlight module and backlight drive, which is applied in optics, nonlinear optics, instruments, etc., and can solve problems such as backlight flickering
Inactive Publication Date: 2013-04-17
HISENSE VISUAL TECH CO LTD
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[0009] The application provides a backlight driving method, a backlight module, and a TV set, which solve the problem of regional backlight flickering in the prior art by adopting the gray value weighted smoothingprocessing technology of adjacent partition display images
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Embodiment 1
[0028] This embodiment provides a backlight driving method, which is applied to a display device including a backlight source, and the backlight source includes N backlight units, wherein the backlight units independently control the brightness of the backlight, where N is a natural number of 2 or greater. In practice, the display device may be a liquid crystal television, or a liquid crystal module, computer equipment, and the like.
[0029] Such as figure 1 A block diagram of the display device 10 in the first embodiment. figure 2 As shown, the display device 10 includes a liquid crystal panel 11 , a liquid crystal panel drive circuit 12 , a backlight source 13 , and a backlight drive circuit 14 .
[0030] The liquid crystal panel 11 includes a plurality of display areas 20, wherein each display area is successively display areas 20a and 20b, etc., figure 2 Other display regions are omitted. Wherein, each display area is composed of a plurality of display pixels, and e...
Embodiment 2
[0057] The second embodiment provides a backlight module, including a backlight and a display panel, the backlight includes N backlight units, wherein the backlight units independently control the brightness of the backlight, where N is 2 or greater than 2 Natural number.
[0058] recombine figure 1 As shown, the structure of the backlight module is the same as that of the display device 10, which will not be repeated here.
[0059] Such as Figure 6 A structural frame diagram of a backlight module, the above-mentioned backlight module further includes a storage unit 102 , a calculation unit 103 , and a control unit 104 .
[0060] The display panel 11 is connected to the backlight source 13, and the backlight source 13 provides light for it, and the N backlight source units respectively correspond to N display areas.
[0061] Further, each display area of the display panel specifically includes a plurality of pixels.
[0071] This embodiment provides a TV set, which includes the backlight module described in the second embodiment. The TV set also includes a power supply circuit, a signal processing circuit, a signal receiving circuit and a casing.
[0072] Wherein, the included backlight module is the same as that of the second embodiment, and will not be repeated here.
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Abstract
The invention provides a backlight driving method and a backlight module as well as a television. On regional backlight controlled display equipment, a plurality of backlight source units are respectively corresponded to multiple areas of a display panel, and each regional backlight can be independently controlled. The gray level values of the first many frames of image signals of a displayed image in each area are stored in a buffer, then the gray levels of the first many frames of image signals and the gray level of the current frame of an image signal in the area are subjected to weighted mean processing, and a first gray level value of the display area is obtained. The first gray level value is provided with a plurality of image signals subjected to the weighted mean processing, thus the gray level value change of the image signal of the current frame has less effect on the first gray level value with the weighted mean. Since the first gray level value is used for controlling the backlight brightness of the area, the effect on the backlight brightness of the area is less, and the problem that the blinking sensibility of backlight caused by that the backlight brightness changes greatly along with the great change of the gray level value on the images of the front frame and the rear frame is prevented.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a backlight driving method, a backlight module, and a television set. Background technique [0002] At present, liquid crystal modules have adopted a dynamic dimming technology, which adjusts the brightness of the backlight of the module according to the change of the grayscalesignal of the displayed image, so as to reduce energy consumption. Dynamic dimming technology includes regional dynamic dimming technology and non-regional dynamic dimming technology. Among them, regional dynamic dimming technology is to adjust the area independently by dividing the module backlight into multiple areas, and each area displays the gray level of the image. Module backlight brightness. [0003] Among them, the regional dynamic dimming technology mainly extracts the gray value of the image from the image signal, and controls the backlight brightness of the corresponding backlight partition t...
Claims
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