Mini-LED低分区背光源分级权重赋值设计

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关键词：Mini-LED；低分区；分区背光；分级权重赋值；FPGA

中图分类号：TP391；TN27文献标识码：A doi：10.37188/CJLCD.2025-0079 CSTR：32172.14.CJLCD.2025-0079

Abstract：Traditional backlight acquisition designs in Mini-LEDs sufer from several drawbacks，including excessive halo efects，overly bright backlighting that undermines energy-saving performance，and suboptimal display quality.To address these issues，we propose a low-partition backlight hierarchical weight asignment design.Based on the traditional average dimming method，this design introduces a hierarchical weight optimization for backlight brightness control in each partition. It involves comparing the image pixels within each partition against a predetermined threshold and applying binary labeling to the original image pixels.

Subsequently，the proportion of pixels within the partition exceeding the preset grayscale threshold is calculated and categorized into multiple levels，and the grading weight values are asigned according to the reverse compensation strategy.By utilizing the assigned level weights ofeach partition，the backlight brightness value of the partition is updated on the basis of the average brightness value，thereby achieving brightness adjustment for image display.The efectiveness of this design has been verified through Matlab simulation. Furthermore，the design has been implemented on a Gowin FPGA. Results from 1O sets of practical tests indicate that the average structural similarity（SSIM） of the images in this design is O.96719，which is closer to 1 than the O.93l 26 obtained by the average method and the O.938 96 obtained by the maximum method. Compared with the average method and the maximum method，the average peak signal-to-noise ratio（PSNR）of the images in this design is increased by 6.00069dB and 13.842 22 dB respectively，and the average energy consumption is reduced by O.63 W and 2.71 W respectively. This design not only reduces energy consumption but also significantly enhances the display quality.

Key words： Mini-LED；low partition zones; local dimming;hierarchical weight assignment; FPGA

1引言

随着数字化时代对视觉体验要求的提升，显示技术领域正迎来变革。（剩余13705字）