Evaluation of LCD local‐dimming‐backlight system

Chen, Hanfeng; Ha, Tae Hyeun; Sung, Jang Hyun; Kim, Hyung Rae; Han, Baik Hee

doi:10.1889/jsid18.1.57

Cited by 64 publications

(48 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A liquid crystal (LC) panel with high resolution then creates the detailed image components and color while compensating for the low‐resolution gradients of the backlight. This permits the display to have excellent global contrast, in which different parts of the image can have very different local average brightness and a local contrast level that enables texture visibility within that region …”

Section: Introductionmentioning

confidence: 99%

“…The main underpinning of the local dimming solution is that the high contrast image features are spatially separated in an image; a low‐resolution backlight is adequate to represent these large global variations, and a high‐resolution LC panel can produce all local details . However, in scenes where there is a sharp boundary between a bright area and a dark area, light will leak through the LC near the boundary; this leakage is known as haloing or leakage, and is illustrated in Fig. .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The importance of native panel contrast and local dimming density on perceived image quality of high dynamic range displays

Hoffman

Stepien

Xiong

2016

Jnl Soc Info Display

View full text Add to dashboard Cite

-We evaluated the perceived image quality of High Dynamic Range (HDR) content rendered using different types of local dimming and organic light-emitting diode (OLED) displays. Using an OLED display that is capable of achieving high contrast at a pixel level, we emulated local dimming displays to evaluate their image quality. In a set of subjective experiments, observers compared HDR images and videos rendered with different local dimming densities and native panel contrast. There was a strong effect of panel contrast on perceived quality and also a strong trend toward preference for a larger number of dimming zones. We also evaluated the panel contrast and number of local dimming zones necessary to achieve image quality comparable with OLED. The findings of these experiments demonstrated that the use of a high-contrast panel remains of critical importance. Also, the preference for panel rendering mode remains robust to normal levels of indoor ambient light.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The importance of native panel contrast and local dimming density on perceived image quality of high dynamic range displays

Hoffman

Stepien

Xiong

2016

Jnl Soc Info Display

View full text Add to dashboard Cite

show abstract

“…Thus, the luminance of the image block area is considered to be uniform. [25][26][27][28][29] However, the luminance gradually varies across the image block depending on the distance from each LED unit. Thus, the luminance of an image block may not be uniform throughout the block when some LED units are on and others are off.…”

Section: Introductionmentioning

confidence: 99%

Adaptive one-dimensional dimming technique for liquid crystal displays with low power consumption and high image quality

Kim

2015

Opt. Eng

View full text Add to dashboard Cite

Abstract. An adaptive one-dimensional (1-D) dimming technique for liquid crystal displays that compensates for nonuniform backlight distribution is proposed. Dimming techniques that do not consider luminance distribution may cause severe visual artifacts, such as a block artifact. However, an adaptive 1-D dimming technique that considers luminance distribution can reduce power consumption without causing any visual artifacts. Hardware implementation results verified that our method achieved lower power consumption compared to nondimming techniques and removed block artifacts from International Electrotechnical Commission 62087 standard images. The power consumption using the proposed method ranged from 85.5% to 94.7% compared to nondimming techniques. Furthermore, the contrast ratio increased by up to 231% and 165% on average compared to nondimming techniques. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

“…As a result, the power saving we can get is poor. To overcome this drawback, adaptive methods [2], [3], [4] have been developed to balance the trade-off between the image quality and the power consumption.…”

Section: Introductionmentioning

confidence: 99%

Local Dimming of Liquid Crystal Display Using Visual Attention Prediction Model

Lee

Shaw

Liao

et al. 2011

2011 Proceedings of 20th International Conference on Computer Communications and Networks (ICCCN)

View full text Add to dashboard Cite

Local dimming of the LED backlight is a popular technique for saving the power of a liquid crystal display. This paper presents a novel approach that improves the performance of conventional local dimming algorithms by incorporating a visual attention prediction model in the backlight dimming process. The approach saves the energy of the liquid crystal display and, in the mean time, maintains the perceptual image quality. This is achieved by preserving the backlight luminance of the image areas that attract human attention while reducing that of the other image areas. Experimental results are provided to show the effectiveness of the proposed approach.

show abstract

Evaluation of LCD local‐dimming‐backlight system

Cited by 64 publications

References 11 publications

The importance of native panel contrast and local dimming density on perceived image quality of high dynamic range displays

The importance of native panel contrast and local dimming density on perceived image quality of high dynamic range displays

Adaptive one-dimensional dimming technique for liquid crystal displays with low power consumption and high image quality

Local Dimming of Liquid Crystal Display Using Visual Attention Prediction Model

Contact Info

Product

Resources

About