Viewing direction-aware backlight scaling

Wu, Chih-Nan; Cheng, Wei‐Chung

doi:10.1145/1228784.1228854

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…The work, however, did not employ or provide a power model for the OLED display. There is also a large body of work on energy optimization of conventional LCD systems [2,4,[12][13][14][15][16][17][18][19][20][21][22][23]. While many of the proposed techniques may be applied to OLED displays, they are orthogonal to the power modeling techniques presented in this work.…”

Section: Second Given the Complete Bitmap Of The Display Content Homentioning

confidence: 99%

Power modeling of graphical user interfaces on OLED displays

Dong

Choi

Lin

2009

Proceedings of the 46th Annual Design Automation Conference

105

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Emerging organic light-emitting diode (OLED)-based displays obviate external lighting; and consume drastically different power when displaying different colors, due to their emissive nature. This creates a pressing need for OLED display power models for system energy management, optimization as well as energyefficient GUI design, given the display content or even the graphical user interface (GUI) code. In this work, we present a comprehensive treatment of power modeling of OLED displays, providing models that estimate power consumption based on pixel, image, and code, respectively. These models feature various tradeoffs between computation efficiency and accuracy so that they can be employed in different layers of a mobile system. We validate the proposed models using a commercial QVGA OLED module. For example, our statistical learning-based image-level model reduces computation by 1600 times while keeping the error below 10%, compared to the more accurate pixel-level model.

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Section: Second Given the Complete Bitmap Of The Display Content Homentioning

confidence: 99%

Power modeling of graphical user interfaces on OLED displays

Dong

Choi

Lin

2009

Proceedings of the 46th Annual Design Automation Conference

105

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show abstract

“…The LCD panel also can introduce an angular dependence of luminance but as a function of pixel gray levels. 11 However, the luminance must be matched to the particular specifications, which consider the peak screen luminance L peak = L(0,0) TV for a white color point. A regular desktop color display device has a peak luminance of approximately 100 nits, while a high-luminance TV can have a peak luminance up to 300-600 nits.…”

Section: Power Managementmentioning

confidence: 99%

Brightness management in a direct LED backlight for LCD TVs

Sun¹,

Moreno²,

Chung³

et al. 2008

J Soc Info Display

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Abstract— A method of calculating the luminance and luminance uniformity of a bottom LED backlight is proposed and demonstrated. Both the power consumption and brightness uniformity as a function of screen brightness, screen size, backlight thickness, transmittance of the LCD panel, reflective cavity efficiency, gain, cone angle of the enhancement films, LED array configuration, and the average luminous flux, radiation pattern, and input power of individual LEDs. Moreover, a 42‐in. LCD TV using this backlight design approach was fabricated. The bottom backlight incorporates an array of RGGB 4‐in‐1 multi‐chip LEDs within a highly reflective box behind a diffuser and a dual brightness‐enhancement film. The brightness uniformity can be predicted within an accuracy of 94% and the luminance level within an accuracy of 96%.

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“…The LCD panel also can introduce an angular dependence of luminance but in function of pixel grey levels. 11 However, the luminance must be matched to international standards, which consider the peak screen luminance L peak =L(0,0) TV for a white color point. The backlight luminance can be written in terms of a normalized angular distribution f :…”

Section: A Power Managementmentioning

confidence: 99%

Direct LED backlight for large area LCD TVs: brightness analysis

Sun

Moreno²,

Chung

et al. 2007

SPIE Proceedings

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A direct or bottom LED backlight is a key concept in large area LCD displays because it does not use a light guide, is flat, and is easy to assemble. In this paper, a method of luminance management for a bottom LED backlight is proposed and demonstrated. We analytically calculate both the power consumption and brightness uniformity in function of: screen brightness, screen size, backlight thickness, transmittance of the LCD panel, reflective cavity efficiency, gain and cone angle of enhancement films, LED array configuration, and the average luminous flux and radiation pattern of a single LED. Moreover, a 42-inch LCD television with this backlight design approach is made and demonstrated. The bottom backlight incorporates an array of RGGB 4-in-1 multi-chip LEDs within a highly reflective box behind a diffuser and a dual brightness enhancement film. We predict with an accuracy of 94% the brightness uniformity and with 96% the luminance level.

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Viewing direction-aware backlight scaling

Cited by 4 publications

References 3 publications

Power modeling of graphical user interfaces on OLED displays

Power modeling of graphical user interfaces on OLED displays

Brightness management in a direct LED backlight for LCD TVs

Direct LED backlight for large area LCD TVs: brightness analysis

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