Optics and Precision Engineering, Volume. 32, Issue 9, 1408(2024)
Regional gradient dimming strategy for low-power silicon-based OLED microdisplays
Figures & Tables(17)
Fig. 7. Regional， global throttling factors， and regional， global power limits processed images
Fig. 10. FPGA-based hardware system architecture framework and test platform
Table 1. Data of fovea-brightness masking characteristic experiment
View tableView in ArticleTable 1. Data of fovea-brightness masking characteristic experiment
属 性 背景亮度 视 角 亮度掩蔽 20，60，100，140，180，220，240 1，2，3，5，10，15，20，25，30，35，40，45，50
Table 2. Comparison of average brightness of 24 test images
View tableView in ArticleTable 2. Comparison of average brightness of 24 test images
方法 亮度均值 原图 111.92 直方图均衡化 129 本算法 117.33
Table 3. Some image evaluation indexes after processing by regional dimming algorithm
View tableView in ArticleTable 3. Some image evaluation indexes after processing by regional dimming algorithm
图 像 EME MS-SSIM 0°~10° 10°~40° 40°以上 0°~10° 10°~40° 40°以上 kodim01 63.231 5 63.031 1 60.690 8 0.951 5 0.958 7 0.963 4 kodim05 68.520 4 62.035 2 58.345 2 0.953 9 0.956 1 0.960 1 kodim06 32.011 3 32.014 2 31.236 3 0.973 1 0.974 1 0.975 3 kodim09 16.204 8 17.037 1 15.104 5 0.962 9 0.965 3 0.967 4 Kodim13 51.461 4 50.452 9 49.175 4 0.953 9 0.955 3 0.956 3 Kodim17 37.735 2 34.676 6 32.382 2 0.960 6 0.965 9 0.968 4 Kodim20 18.460 0 15.815 1 15.611 3 0.966 0 0.967 8 0.965 1 Kodim24 27.452 8 27.439 4 26.967 3 0.931 8 0.939 7 0.946 2
Table 4. Image evaluation indexes after processing by different algorithms
View tableView in ArticleTable 4. Image evaluation indexes after processing by different algorithms
算 法 MOS EME MS-SSIM 原图像 4.0 21.590 2 1 线性调光 3.5 21.587 6 0.977 0 周边调光 3.9 21.583 4 0.965 3 区域梯度调光 4.2 33.753 1 0.947 1
Table 5. Parameters of silicon-based OLED microdisplays
View tableView in ArticleTable 5. Parameters of silicon-based OLED microdisplays
参 数 值 驱动方式 全数字PWM 像素分辨率 2 048×（3）×2 048 屏幕尺寸 1.3 inch 像素面积 3.8（×3） μm×11.4 μm 数据带宽 28.69 Gbit 像素时钟 112 MHz
Table 6. Power consumption of each part of system at gaze point of （250， 250）
View tableView in ArticleTable 6. Power consumption of each part of system at gaze point of （250， 250）
测试图像 Po Pc P η/% kodim01 46.62 4.98 31.50 21.75 kodim02 29.35 4.56 18.42 21.70 kodim03 38.12 5.67 26.73 15.01 kodim04 35.45 5.21 23.06 20.25 kodim05 30.51 5.32 19.34 19.17 kodim06 60.44 4.89 44.82 17.75 kodim07 45.86 5.28 31.07 20.74 kodim08 54.45 4.84 37.68 21.91 kodim09 65.45 5.30 47.31 19.62 Kodim10 59.68 5.32 43.74 17.79 Kodim11 37.43 5.12 24.96 19.64 Kodim12 88.53 4.34 66.44 20.05 Kodim13 48.35 4.23 33.72 21.51 Kodim14 41.23 4.89 28.23 19.67 Kodim15 27.75 5.45 17.13 18.63 Kodim16 42.92 4.84 29.25 20.57 Kodim17 34.91 4.67 23.38 19.65 Kodim18 25.55 4.56 15.94 19.77 Kodim19 57.49 4.95 40.31 21.27 Kodim20 91.58 5.04 68.42 19.79 Kodim21 50.14 5.12 36.30 17.39 Kodim22 51.73 4.34 34.96 24.03 Kodim23 53.31 4.85 38.88 17.97 Kodim24 44.15 4.77 31.53 17.78 平均值 48.38 4.94 33.88 19.26
Table 7. Energy saving rates at different gaze points
View tableView in ArticleTable 7. Energy saving rates at different gaze points
凝视点位置 平均节能率/% （50，50）（边缘点） 23.05 （150，150）（中间点） 22.23 （250，250）（中心点） 19.26
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Yuan JI, Xinde MA, Yanrui SUN, Baoliang CHEN, Yin ZHANG. Regional gradient dimming strategy for low-power silicon-based OLED microdisplays[J]. Optics and Precision Engineering, 2024, 32(9): 1408
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Received: Jan. 3, 2024
Accepted: --
Published Online: Jun. 2, 2024
The Author Email: Yuan JI (jiyuan@shu.edu.cn)
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