【摘要】 为实现高动态范围（HDR）显示，显示器的背光LED需增大驱动电流来提高发光亮度。然而增加电流会导致LED效率下降，为缓解效率下降引入第四种原色（橙色）。通过四原色混合，将亮度分配给不同组的三原色LED来降低驱动电流，从而实现节能。结果表明在1000 cd/m~2的HDR亮度下，最大可降低23.7%的功耗，平均功耗降低10.97%。除亮度分配方法，还研究了改善LED“绿色间隙”对减缓效率下降的效果。与该方案的功耗相比，本文方法在白色情况下低5百分点，在其他情况下低3百分点以上，再次验证了本文方法在现有方法中的优越性。更多还原

【Abstract】 In order to achieve high dynamic range(HDR) displays, the backlight LEDs of monitors need to increase the drive current to improve the luminous intensity. However, LED efficiency will be decreased with the increasing of current, and a fourth primary colour(orange) was introduced to mitigate the decrease of efficiency. Energy saving was achieved by mixing four primary colours and the brightness was allocated to different groups of three primary colour LEDs to reduce the drive current. Results show that the maximum power consumption can be reduced by 23. 7% at HDR brightness of 1000 cd/m~2,and the average power consumption reduced by 10. 97%. In addition to the brightness allocation method, this paper also investigated the effect of improving the LED “green gap” on mitigating the efficiency decline. Compared with the power consumption of this scheme, the proposed method is 5 percentage points lower in white conditions and more than 3percentage points lower in other situations, once again verifying the superiority of the proposed method in existing methods.更多还原