基于两段直线模型的低功耗高画质显示驱动算法研究及其FPGA实现

Low-Power and High-Quality Display Driving Algorithm Based on Two-Line Model and Related FPGA Realization

由于手机电池电量有限,显示面板功耗过大引起的频繁充电问题严重地影响了智能手机的用户体验.本文提出了一种基于两段直线模型的低功耗高画质显示驱动算法.首先,将输入图像从RGB空间转换到YUV空间.随后,计算亮度平均值和最大值.在此基础上构建两段直线模型,并根据该模型产生新亮度分量.最后,将YUV空间转换到RGB空间,得到处理后的图像.实验结果表明,相比于NPC和ACSC算法,提出算法处理所得图像的MSE分别降低了30.9%和29.9%.此外,本算法产生的显示功耗最低.该算法研究已通过FPGA验证,结果表明,处理后的图像显示效果优越.

The short life of battery becomes the bottleneck that greatly undermines user’s experience of smart phones due to the high power loss on display panel.To overcome the challenge,a low-power and high-quality display driving algorithm based on two-line model is proposed in this study.Firstly,the original image is converted from the RGB space to the YUV space.Subsequently,the average and maximum luminance values are calculated to enable the two-line model to be established based on the corresponding average and maximal luminance values.Finally,the YUV space is converted back to the RGB space and the renewed image is obtained after generating the renewed luminance under the assistance of the two-line model.The experimental results show that the MSE of image processed by the proposed algorithm is 30.9%and 29.9% lower than that processed by the NPC and the ACSC,respectively,with the lowest power consumption.Moreover,the proposed algorithm has been successfully verified on an FPGA board without causing a significant degradation of visual effect.