Hardware/Software Support and Algorithms for Dynamic Backlight Scaling in TFT LCDs

0541469南加州的Massoud PedramU TFT LCD显示组件中用于动态背光缩放的硬件/软件支持和算法已成为各种便携式、配备显示器的微电子系统和产品中最大化电池寿命的主要重点。降低所有类型显示器的功耗的一种特别有效的技术是动态背光缩放技术，其中背光灯的强度和LCD透射率函数同时且成比例地改变，从而以低得多的功耗水平在人眼中产生相同的视觉感觉。因此，本研究旨在开发时空和/或颜色感知的背光缩放技术，用于显示的静止图像或视频流的像素变换，从而在目标平台上最大化节能。这些新技术利用人类视觉系统的特性，将原始图像/视频和背光比例的图像/视频之间的失真降至最低，将在阿波罗试验台II硬件平台上实现和演示。这项研究的更广泛影响是显著降低典型手持设备的功耗，延长其放电循环寿命，从而使此类设备能够更广泛和方便地使用。背光调光技术也可以应用于交流供电系统，因为交流系统的关键问题是个人用户和整个社会的能源成本。这项技术有可能将台式计算机的典型能耗降低30%左右(当使用该系统时)。如果这项研究成功，将加快先进显示技术的引入(例如基于LED的LCD背光，或基于有机LED的显示器)，因为它将在不牺牲质量的情况下降低它们的电力成本。

0541469Massoud PedramU of Southern CaliforniaHardware/Software Support and Algorithms for Dynamic Backlight Scaling in TFT LCDs Display components have become a key focus of efforts for maximization of the battery lifetime in a wide range of portable, display-equipped, microelectronic systems and products. A particularly effective technique in reducing the power consumption of all kinds of displays is the dynamic backlight scaling technique, where the intensity of the backlight lamp and the LCD transmittance function are changed concurrently and in proportion so that the same visual perception is created in the human eyes at much lower levels of power consumption. This research therefore aims to develop spatiotemporal and/or color-aware backlight scaling techniques for pixel transformation of the displayed still images or video streams so as to maximize the energy saving in a target platform. The new techniques , which take advantage of the human visual system characteristics to minimize distortion between the original and backlight-scaled images/videos, will be implemented and demonstrated on the Apollo Testbed II hardware platform. The broader impact of the research is to significantly reduce the power consumption of typical handheld devices, increasing their discharge-cycle lifetime, thereby, enabling more widespread and convenient use of such devices. The backlight dimming technology can also be applied in AC-powered systems where the key concern is the energy cost to the individual user as well as the society at large. This technology has the potential to reduce the typical energy bill of a desktop computer by 30% or so (when the system is being used). This research, if successful, will expedite introduction of advanced display technologies (such as LED-based backlighting for LCDs, or organic LED-based displays) since it will reduce their power cost without sacrificing quality.