【作者】 李红茹；

【导师】 雷志春；

【作者基本信息】 天津大学 ， 电路与系统， 2020， 硕士

【摘要】 节能减排一直都是世界各国普遍关注的一个重要问题。随着显示屏尺寸的不断增大、亮度的逐步提升和应用场合的日趋广泛,在保持或提升现有显示质量的同时,降低显示屏的能耗变得越来越迫切。由于现阶段的多原色节能显示技术大多都未能考虑到人眼的视觉特性,因此本文在综合考虑人眼明视觉光谱光视效率函数和LED的电光转换效率函数的情况下,研究出一种面向节能显示的四原色混色方案。在通常情况下,人们通过将红绿蓝(RGB)三原色混色可形成其他复合色光。通过分析红原色的明视觉光谱光视效率函数值和红色LED的电光转换效率值可知:使用红原色进行显示会产生较大能耗。因此可以考虑在原本红绿蓝三原色的基础上,加入第四原色来尽可能减少在混色中红原色的使用频率。首先,本文通过理论分析和建模仿真等方式确定了第四原色的波长和位置,确保该方案能够在不缩减当前色域的同时产生尽可能小的显示能耗。结果表明当第四原色的波长位于580-590 nm橙色O的范围内时其节能效果最好。基于此,色度图中的?RGB被分为?RBO和?GBO两个三角形,属于?RBO色域范围内的颜色将依旧由传统的红绿蓝三原色进行混色,而属于?GBO色域范围内的颜色将由新的橙绿蓝三原色进行混合得到。其次,通过对比红绿蓝和橙绿蓝三原色混色方案下形成相同亮度的待测颜色点时的能耗情况可知:针对色域中?GBO边缘和内部中的所有颜色点,四原色显示方案能够在不影响人眼色彩感知的前提下产生显著节能效果,平均节能效率约为18.8%,最大节能效率高达32.8%。最后,确定了针对图像像素点的具体混色方案,并对多幅国际标准测试图片进行了测试,统计了图片中能够产生节能效果的像素点数目在总像素点数目中所占的比例。测试结果证明该四原色节能显示方案无论是在标准动态范围显示系统还是高动态范围显示系统中都同样适用,并且具有复杂度低、节能效果显著等诸多优点。更多还原

【Abstract】 Energy saving and emission reduction has always been an important issue of universal concern in the world.With the continuous increase of the display size,the gradual improvement of the display brightness and the increasingly wide application of the display,it is more and more urgent to reduce the energy consumption of the display screen while maintaining or improving the existing display quality.At present,most of the multi-primary-color energy-saving display technologies do not take the visual characteristics of the human eyes into account,so this thesis studies a four-primarycolor mixing scheme for energy-saving display under the comprehensive consideration of the photopic luminosity efficiency function of the human eye and the wall-plug efficiency function of the LED.It is common that one applies the red,green and blue(RGB)three primary colors to render composite colors.Through the analysis of the photopic luminosity efficiency value and the wall-plug efficiency value of the red LED,it can be seen that the use of red primary color for display will produce a large energy consumption.Therefore,one can use an additional primary color to diminish the usage of red primary color as much as possible in the course of color mixing.First,both theoretical analysis and a model simulation are used to determine the wavelength of the fourth color so that the display panel power consumption can be reduced and simultaneously the color gamut at least does not shrink.Results show that the energy-saving effect is best when the wavelength of the fourth primary color ranges between 580 nm-590 nm orange(O)light.Based on this,?RGB triangle on the chromaticity diagram is divided into ?RBO and ?GBO two triangles.Colors that fall within the ?RBO will be further mixed by the traditional red,green and blue,whereas colors that fall within the ?GBO will be mixed by the new orange,green and blue primaries.Secondly,by comparing the energy consumption of the colors to be measured under the RGB and OGB three-primary-color mixing schemes,the conclusion is that for all the colors in the edge and inside of the ?GBO color gamut,the four-primarycolor display scheme can produce significant energy-saving effect without affecting the human eye color perception.The average energy-saving efficiency is about 18.8% and the maximum energy-saving efficiency is even as high as 32.8%.Finally,the specific color mixing scheme for image pixels is determined and a number of international standard pictures are tested,and the proportion of the number of pixels that can produce energy-saving effect in the total number of pixels is counted.The test results show that the four-primary-color energy-saving display scheme is applicable to both standard dynamic range display system and high dynamic range display system.And it has many advantages such as low complexity and significant energy-saving effect.更多还原