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

0541469 Massoud PedramU，南加州TFT LCD中动态背光缩放的硬件/软件支持和算法显示组件已成为广泛的便携式、配备显示器的微电子系统和产品中最大化电池寿命的关键焦点。在降低所有类型的显示器的功耗方面的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，使得在低得多的功耗水平下在人眼中产生相同的视觉感知。因此，本研究的目的是开发时空和/或颜色感知背光缩放技术的像素变换显示的静态图像或视频流，以便最大限度地节省能源的目标平台。新技术利用人类视觉系统的特性，最大限度地减少原始和背光缩放图像/视频之间的失真，将在Apollo Testbed II硬件平台上实现和演示。该研究的更广泛影响是显着降低典型手持设备的功耗，增加其放电循环寿命，从而使此类设备的使用更加广泛和方便。背光调光技术也可以应用于交流供电系统，其中主要关注的是个人用户以及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源账单减少30%左右（当系统正在使用时）。这项研究如果成功，将加快先进显示技术（如LCD的LED背光或有机LED显示器）的引入，因为它将在不牺牲质量的情况下降低其电力成本。

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.