White‐LED backlight control for motion‐blur reduction and power minimization in large LCD TVs

Lee, Wonbok; Patel, Kimish; Pedram, Massoud

doi:10.1889/jsid17.1.37

Cited by 16 publications

(14 citation statements)

References 31 publications

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“…After the linear superposition of these two voltages, we can get the reference voltage with zero temperature coefficients [4]. …”

Section: ) the Achievement Of The Reference Voltage With Zero Tempermentioning

confidence: 99%

Design of Pmoled Display System Based on Pam

2017

IJOMAM

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-As the next generation of flat panel displays, OLED displays have a variety of outstanding features and advantages. At present, OLED display technology is a hotspot in the display technology research in the world. In addition, there are a large number of small and medium size OLED displays used in portable devices, and the manufacturing technology of large-size OLED display is maturing. An image display control system is designed for the PMOLED display. The system uses dedicated PMOLED display driver chip packaged by TAB and have advantages of easy driving and high reliability. Oxide TFT has advantages of better mobility, stability and uniformity, which is one of the most powerful competitors of active substrate technology. In this paper, a video display control system based on AMOLED display driver circuit of metal oxide TFT substrate is designed. The system uses TFT-LCD driver chip of COG package in place of AMOLED display dedicated driver chip, which has advantages of easy achievement and cheap and meets the needs of initial research and development of AMOLED display. The system takes DVI interface as the video signal transmission interface, and takes FPGA as a scan and data driver chip timing controller with reusable and flexible features. Video display control system has achieved a 7-inch 320x3x240 pixel AMOLED display real-time dynamic video display with 64 grayscale and 60Hz frame rate, and the display is good.

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“…After the linear superposition of these two voltages, we can get the reference voltage with zero temperature coefficients [4]. …”

Section: ) the Achievement Of The Reference Voltage With Zero Tempermentioning

confidence: 99%

Design of Pmoled Display System Based on Pam

2017

IJOMAM

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“…Techniques in the last category reduce the backlight luminance and adjust colors to enhance the brightness and/or contrast of the image to compensate the image quality degrada- tion [2], [3], [13], [14], and [15]. These backlight scaling techniques do not incur noticeable image degradation, nor does it result in a large color change.…”

Section: Related Workmentioning

confidence: 99%

Dynamic Driver Supply Voltage Scaling for Organic Light Emitting Diode Displays

Shin

Kim

Chang

et al. 2013

IEEE Trans. Comput.-Aided Des. Integr. Circuits Syst.

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Abstract-Organic light emitting diode (OLED) display is a self-illuminating device that is supposed to be power efficient than liquid crystal display (LCD). However, OLED display panels consume as much power as LCD panels due to total internal refection. As the power consumption of the OLED panel depends on the pixel colors, most previous power saving methods alter the pixel colors. In practice, such OLED power saving techniques can hardly accommodate photo viewers and movie players. This paper introduces the first OLED power saving technique that dynamically changes the supply voltage of the panel. Reduced supply voltage results in both power saving and decreased pixel luminance, but model-based color correction restores the decreased luminance with minimum color distortion. This technique is similar to dynamic backlight scaling of LCDs but is based on the unique characteristics of the OLED drivers. We provide an online color compensation algorithm using the luminance histogram. Luminance quantization in the histogram also achieves resource minimization. We develop a prototype and demonstrate the proposed OLED dynamic voltage scaling (DVS). Experimental result shows that the proposed OLED DVS saves up to 74.7% of the display power for the still images and up to 35.9% for movie clips.

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“…Features Applications Applicable displays Usage-based control [4,5] Not functional during low-power mode Interactive applications CRT, LCD and OLED Partial display turn off [6,7] Disable objects no in interest Mixed active/idle objects Some LCDs and OLED Color remapping [8,9,10] Altered look and feel GUI LCD and OLED Backlight scaling [1,2,12,13,14] Minor 10% power consumption difference due to change in the colors being displayed [11]. In addition, pixel color remapping provides more headroom for backlight dimming and, in turn, higher power saving [8].…”

Section: Techniquesmentioning

confidence: 99%

“…It is applicable only to the graphics user interface (GUI) and applications not dealing with natural images, photos, or video. Techniques in the last category reduce the backlight luminance and adjust colors to enhance the brightness and/or contrast of the image to compensate the image quality degradation [1,2,12,13,14]. These backlight scaling technique does not incur noticeable image degradation, nor does it result in a large color change.…”

Section: Techniquesmentioning

confidence: 99%

Dynamic voltage scaling of OLED displays

Shin

Kim

Chang

et al. 2011

Proceedings of the 48th Design Automation Conference

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Unlike liquid crystal display (LCD) panels that require highintensity backlight, organic LED (OLED) display panels naturally consume low power and provide high image quality thanks to their self-illuminating characteristic. In spite of this fact, the OLED display panel is still the dominant power consumer in battery-operated devices. As a result, there have been many attempts to reduce the OLED power consumption. Since power consumption of any pixel of the OLED display depends on the color that it displays, previous power saving methods change the pixel color subject to a tolerance level on the color distortion specified by the users. In practice, the OLED power saving techniques cannot be used on common user applications such as photo viewers and movie players.This paper introduces the first OLED power saving technique that does not result in a significant degradation in the color and luminance values of the displayed image. The proposed technique is based on dynamic (driving) voltage scaling (DVS) of the OLED panel. Although the proposed DVS technique may degrade luminance of the panel, the panel luminance can be restored with appropriate image compensation. Consequently, power is saved on the OLED display panel with only minor changes in the color and luminance of the image. This technique is similar to dynamic backlight scaling of LCDs, but is based on the unique characteristics of the OLED drivers. The proposed method saves wasted power in the driver transistor and the internal resistance with an amplitude modulation driver, and in the internal resistance with a pulse width modulation driver, respectively. Experimental results show that the proposed OLED DVS with image compensation technique saves up to 52.5% of the OLED power while keeping the same human-perceived image quality for the Lena image.

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White‐LED backlight control for motion‐blur reduction and power minimization in large LCD TVs

Cited by 16 publications

References 31 publications

Design of Pmoled Display System Based on Pam

Design of Pmoled Display System Based on Pam

Dynamic Driver Supply Voltage Scaling for Organic Light Emitting Diode Displays

Dynamic voltage scaling of OLED displays

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