Backlight module and driving method of backlight module
A technology of a backlight module and a driving method, which is applied to instruments, static indicators, etc., can solve the problem of low gray-scale brightness and large brightness, and achieve the effect of alleviating that the low gray-scale brightness is greater than the high gray-scale brightness and maintaining stability
Inactive Publication Date: 2020-12-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the a...
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The invention provides a backlight module and a driving method of the backlight module. The backlight module comprises a plurality of backlight units arranged in an array. The driving method comprisesthe following steps: acquiring backlight data corresponding to each backlight unit in a current frame, the backlight data comprising data of N bits, and N being a positive integer; carrying out segmentation processing on each backlight unit at the time required by the current frame to obtain N sub-fields with different durations, and correspondingly displaying data of one bit in each sub-field; outputting the N sub-fields of each backlight unit according to a preset sequence, a scanning line corresponding to each backlight unit is controlled to carry out scanning once in each sub-field; wherein the plurality of sub-fields corresponding to the at least one backlight unit comprise a first sub-field of which the duration is greater than a first threshold, the scanning line corresponding to the backlight unit is controlled to carry out scanning for at least two times in the first sub-field, and the time interval of adjacent times of scanning is smaller than a second threshold. The technical problem that the low-gray-scale brightness is larger than the high-gray-scale brightness is solved.
Description
technical field [0001] The present application relates to the field of display technology, in particular to a backlight module and a driving method of the backlight module. Background technique [0002] Mini-LED backlight is widely used as the backlight source of liquid crystal display panel due to its small size, ultra-thin and multi-zone driving characteristics. The existing Mini-LED backlight module uses PWM dimming to improve the display effect. Specifically, the scanning time of a frame display screen is divided into n subfields of different sizes, and the n-bit data provided by the front-end timing controller TCON or FPGA Use n subfields to display, where each bit of n-bit data is displayed in a subfield, and high-bit data is displayed in a subfield with a longer duration, and low-bit data is displayed in a subfield with a longer duration. The display is performed in a subfield with a shorter duration. Therefore, when a high gray scale needs to be displayed, it is dis...
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IPC IPC(8): G09G3/34
CPCG09G3/3426G09G3/32G09G3/2022G09G2310/024G09G2300/0842G09G2310/08G09G2320/0247G09G3/2037G09G3/2007G09G3/3611G09G2330/021
Inventor 肖光星
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD