Power minimization in a backlit TFT-LCD display by concurrent brightness and contrast scaling
Power minimization in a backlit TFT-LCD display by concurrent brightness and contrast scaling
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DOI：
10.1109/date.2004.1268857
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发表时间：
2004-02
期刊：
影响因子：
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通讯作者：
W. Cheng;Yu Hou;M. Pedram
中科院分区：
文献类型：
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作者：
W. Cheng;Yu Hou;M. Pedram
本文提出了一种用于冷阴极荧光灯（CCFL）背光TFT-LCD显示器的亮度和对比度同步缩放（CBCS）技术。所提出的技术旨在通过减少背光照明来节省功率，同时通过保持图像对比度来保持图像保真度。首先，我们解释CCFL的工作原理，并展示如何对其背光照明和功耗之间的非线性进行建模。接下来，我们提出了对比度失真度量来量化背光缩放后的图像质量损失。最后，我们制定和优化解决CBCS优化问题的目标是最小化的保真度和功率指标。实验结果表明，在对比度失真仅为10%的情况下，平均可节省3.7倍的功耗。
This paper presents a concurrent brightness and contrast scaling (CBCS) technique for a cold cathode fluorescent lamp (CCFL) backlit TFT-LCD display. The proposed technique aims at conserving power by reducing the backlight illumination while retaining the image fidelity through preservation of the image contrast. First, we explain how CCFL works and show how to model the non-linearity between its backlight illumination and power consumption. Next, we propose the contrast distortion metric to quantify the image quality loss after backlight scaling. Finally, we formulate and optimally solve the CBCS optimization problem with the objective of minimizing the fidelity and power metrics. Experimental results show that an average of 3.7X power saving can be achieved with only 10% of contrast distortion.