Dynamic Backlight Gamma on High Dynamic Range LCD TVs

Lin, Fang-Cheng; Huang, Yi‐Pai; Liao, Lin-Yao; Liao, Cheng-Yu; Shieh, Han Ping D.; Wang, Te-Mei; Yeh, Szu-Che

doi:10.1109/jdt.2008.920175

Cited by 98 publications

(8 citation statements)

References 9 publications

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“…The backlight luminance level l i at the ith pixel is determined by the backlight blocks behind and around pixel i. It can be calculated by [11,22]:…”

Section: The Previous Model Of the Local Dimming Problemmentioning

confidence: 99%

“…To achieve higher image quality or lower power consumption, it is necessary to design suitable local dimming algorithms which can effectively set the backlight luminance. In recent years, some local dimming algorithms [7][8][9][10][11] have been proposed. Most of these algorithms calculate backlight luminance based on the pixel values of the image (algorithms based on image pixel values are called parameter-based algorithms in this paper).…”

Section: Introductionmentioning

confidence: 99%

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Using the Guided Fireworks Algorithm for Local Backlight Dimming

et al. 2019

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Local backlight dimming is a promising display technology, with good performance in improving the visual quality and reducing the power consumption of device displays. To set optimal backlight luminance, it is important to design high performance local dimming algorithms. In this paper, we focused on improving the quality of the displayed image, and take local backlight dimming as an optimization problem. In order to better evaluate the image quality, we used the structural similarity (SSIM) index as the image quality evaluation method, and built the model for the local dimming problem. To solve this optimization problem, we designed the local dimming algorithm based on the Fireworks Algorithm (FWA), which is a new evolutionary computation (EC) algorithm. To further improve the solution quality, we introduced a guiding strategy into the FWA and proposed an improved algorithm named the Guided Fireworks Algorithm (GFWA). Experimental results showed that the GFWA had a higher performance in local backlight dimming compared with the Look-Up Table (LUT) algorithm, the Improved Shuffled Frog Leaping Algorithm (ISFLA), and the FWA.

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“…The backlight luminance level l i at the ith pixel is determined by the backlight blocks behind and around pixel i. It can be calculated by [11,22]:…”

Section: The Previous Model Of the Local Dimming Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using the Guided Fireworks Algorithm for Local Backlight Dimming

et al. 2019

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“…The Spectral radiance of the commercially available LED lights is shown in figure 2. The light sources are widely used in LCDs with LED backlights [48] and in organic LED (OLED) and future quantum dot LED (QD-LED) displays [49]. As an additional virtue, the narrow colour spectra of these light sources enable them to selectively stimulate long (L), medium (M) and short (S) wavelength cone photoreceptors.…”

Section: Pragmatic Design Of Composite Stimulimentioning

confidence: 99%

Polychromatic SSVEP stimuli with subtle flickering adapted to brain-display interactions

et al. 2017

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“…Until now, LCD still acts as the dominant display technology in high-reliability applications, such as digital signage displays, TV, and cockpit displays, among others. In order to improve the HDR and uniformity of brightness at low grayscale of LCD [8], dimmable backlight has been proposed, including global dimming [9], [10], [11] and local dimming [12], [13], [14], [15], [16], [17], [18], [19].…”

Section: Introductionmentioning

confidence: 99%

“…The discontinuity in BL between the adjacent region may lead to a distortion of the displayed image. Therefore, various local dimming algorithms have been employed to determine the BL values and pixel compensation [1], [13], [14], [28], [29], [30]. Due to the uneven distribution of BL and light leakage from the liquid crystal panel [3], [4], [31], the halo effect seriously affects the performances of LCD employing local dimming mini-LED backlight.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Local Dimming Algorithms on the Halo Effect in LCD With Local Dimming Mini-LED Backlight

Zhou,

Gao,

Ruan

et al. 2024

IEEE Photonics J.

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The local dimming mini-LED backlight has become one of the most important technologies for liquid crystal display (LCD), facilitating the improvement on high dynamic range (HDR) and power saving. The halo effect still limits the performance of LCDs employing mini-LED backlight. The impact of the number of local dimming zones on the contrast ratio has been investigated. The halo effect has also been investigated under four typical local dimming algorithms and different local dimming zones. It has been experimentally demonstrated that the halo area gradually shrinks with increasing the number of local dimming zones, contributing to the improvement on the HDR of LCD.

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Dynamic Backlight Gamma on High Dynamic Range LCD TVs

Cited by 98 publications

References 9 publications

Using the Guided Fireworks Algorithm for Local Backlight Dimming

Using the Guided Fireworks Algorithm for Local Backlight Dimming

Polychromatic SSVEP stimuli with subtle flickering adapted to brain-display interactions

Impacts of Local Dimming Algorithms on the Halo Effect in LCD With Local Dimming Mini-LED Backlight

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