Processor-Based Backlight Dimming Using Computation Reduction Technique

Kang, Suk‐Ju

doi:10.1109/jdt.2013.2261280

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…The target PSNR was set to 30 dB in all test sequences. This is because the images with PSNR higher than 30 dB are acceptable [14,15]. The pixel resolution of all image sets was 1024 pixel × 768 pixel.…”

Section: Simulation Environmentsmentioning

confidence: 99%

Power Control Technique Using Error Distribution Analysis for Ultrasound Imaging Displays

Cho

Kang

2019

Electronics

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In this paper, a new power control technique based on clipped error distribution is proposed for portable ultrasound imaging displays. To reduce the display power consumption, the backlight dimming is used to select the optimal point between the power reduction of a backlight and the high image quality. In this case, the clipped error, i.e., the saturation error for pixels exceeding the maximum expressible gray level, should be considered. Conventional algorithms do not consider the clipped error distribution, which is the spatial distribution of pixels with the clipped error in a frame image when the power consumption is reduced. Therefore, it degrades the image quality in the medical display. On the other hand, the proposed algorithm calculates statistical values for clipped error distribution by analyzing the image characteristics. Hence, it can avoid degradation of the image quality by concentrating the pixels with clipped errors in a small region. In addition, the proposed algorithm uses a sampling technique, which only uses selected pixels based on the pre-defined sampling pattern, to reduce the computation time. Experimental results show that the proposed algorithm can improve the image quality in terms of peak signal-to-noise ratio by up to 7.063 dB (23.49%) while reducing the computation time by up to 0.451 μs (17.18%) using a sampling technique.

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Section: Simulation Environmentsmentioning

confidence: 99%

Power Control Technique Using Error Distribution Analysis for Ultrasound Imaging Displays

Cho

Kang

2019

Electronics

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“…Recently, display panels have become larger and higher resolution, and the liquid crystal display (LCD) is widely used in various devices such as notebook PCs (NBPCs), automotive, and virtual reality (VR) [1]. Since the LCD backlight consumes most of the energy in portable device, many display systems apply backlight dimming techniques to reduce the power consumption [2,3]. However, these devices conventionally utilize a global backlight unit for the LCD panel, and it leads to high power consumption and low local contrast ratio according to image contents [4].…”

Section: Introductionmentioning

confidence: 99%

79‐1: Invited Paper: Adaptive Local Backlight Dimming Control with Local Boosting

Cho,

Yoo,

Park

et al. 2024

Symp Digest of Tech Papers

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The local backlight dimming (LBD) technology has attracted significant interest for liquid crystal displays. In automotive, notebook PC, and virtual reality applications, LBD should treat the trade‐off between power saving and visual quality enhancement. However, it requires the cost of the high logic complexity to consider the optimal solution at a higher resolution of the image. This paper proposes the adaptive local backlight dimming control, which can reduce the power consumption of backlight and improve the quality of the display. The proposed method analyzes an image contents with a low complexity algorithm, and it applies a local boosting to achieve a target intensity in backlight control. In performance evaluation using FPGA test system, the designed local dimming processor achieved 7.54% higher power‐saving rate with visual quality enhancement in high‐contrast region.

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“…Power consumption in liquid crystal displays (LCDs) is currently the subject of intensive research. [1][2][3][4][5][6][7] To achieve lower power consumption with higher image quality in LCDs, various techniques have been studied, including backlight dimming technologies, [8][9][10][11][12][13][14][15] inversion methods, [16][17][18] and charge sharing (CS) methods. [19][20][21][22][23][24][25] Column inversion provides very low power consumption because only one polarity change occurs per frame.…”

Section: Introductionmentioning

confidence: 99%

Adaptive charge sharing method for liquid crystal displays with lower power consumption

Kim

2015

Opt. Eng

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This paper proposes an adaptive charge sharing (ACS) method for reducing power consumption in liquid crystal displays (LCDs). Our ACS method involves calculating the power consumption of all data lines assuming the charge is shared and analyzing the analog characteristics of the data transitions. With conventional CS, charge is shared between data lines only when the polarities of data signals change. Our ACS method selectively shares charge even when no polarity change occurs, but only if CS provides an overall reduction in power consumption. To compare the performance of ACS and conventional CS, we applied the ACS method to common inversion methods, namely, column, two-dot, and Z inversion. Our simulation results demonstrate that the ACS method can effectively reduce power consumption, especially with the column and Z inversion methods. The average power consumption of the ACS method with column and Z inversion was 87.7% and 84.7%, respectively, of the conventional CS power consumption.

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Processor-Based Backlight Dimming Using Computation Reduction Technique

Cited by 11 publications

References 11 publications

Power Control Technique Using Error Distribution Analysis for Ultrasound Imaging Displays

Power Control Technique Using Error Distribution Analysis for Ultrasound Imaging Displays

79‐1: Invited Paper: Adaptive Local Backlight Dimming Control with Local Boosting

Adaptive charge sharing method for liquid crystal displays with lower power consumption

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