Edge-lit LCD backlight unit for 2D local dimming

Yoon, Gun‐Wook; Bae, Seok-Won; Lee, Yong-Bok; Yoon, Jun‐Bo

doi:10.1364/oe.26.020802

Cited by 26 publications

(13 citation statements)

References 12 publications

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“…However, in this configuration, the image quality improvement by adapting 2D local dimming technology is limited due to inadequate zone number and blurred zone boundary. 14,15 Recently, with the rapid development of mini-LED technology, direct-lit backlights with local dimming functions can also be made quite thin. [16][17][18] As a result, both HDR and thin profile can be achieved simultaneously.…”

Section: Liquid Crystal Displaysmentioning

confidence: 99%

Prospects and challenges of mini‐LED, OLED, and micro‐LED displays

et al. 2021

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Recently, "liquid crystal display (LCD), organic light-emitting diode (OLED), or micro-light-emitting diode (LED): who wins?" is a heated debatable question. In this review article, we provide a comprehensive overview of these three promising display technologies through nine display performance indicators, including ambient contrast ratio, motion picture response time, viewing angle and angular color shift, color gamut, resolution density, power consumption, cost, lifetime, and thin profile and panel flexibility. The advantages and disadvantages of each technology are analyzed, and their future perspectives are discussed.

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Section: Liquid Crystal Displaysmentioning

confidence: 99%

Prospects and challenges of mini‐LED, OLED, and micro‐LED displays

et al. 2021

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“…However, due to the position of the light source, the edge-lit BLU is mostly limited to one-dimensional dimming [22]. Although recent studies have achieved two-dimensional dimming of the edge-lit backlight [23], its application is far less extensive than the direct-lit type. The direct-lit Mini-LED BLU can take advantage of the small size of Mini-LED to divide the backlight area into more dimming blocks, providing higher dimming quality.…”

Section: Mini-led Backlight Lcd Systemmentioning

confidence: 99%

Mini-LED Backlight Technology Progress for Liquid Crystal Display

et al. 2022

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As consumers pursue higher display quality, Mini-LED backlight technology has become the focus of research in the current display field. With its size advantage (100–200 μm), it can achieve one-thousand-level divisional dimming, and it can also be combined with quantum dot technology to greatly improve the contrast, color gamut, dark state and other element of the display performance of LCD displays. Mini-LED backlight technology is undoubtedly the most ideal solution to realize a highly dynamic range display of LCD displays, and has been widely commercialized in many fields such as TVs, tablet computers, notebook computers, and car monitors. This review mainly introduces the efforts made by researchers to eliminate the halo effect, thinning of the backlight module and reducing the backlight power consumption. The application of quantum dot technology in backlight is also presented. We predict that the number of Mini-LED backlight partitions is expected to reach a level of more than 3000 in the future, further utilizing the advantages of the small size in local dimming, but it will also inevitably be challenged by some issues such as power consumption and heat dissipation.

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“…A significant fraction of the world current energy consumption goes into illumination sources or devices that incorporate an illumination source in them. [1,2] To enable a reduction in the use of fossil fuels, an optimization of the efficiency in such illumination devices may become as relevant as the use of renewable energies to power them up. Note that, in some of the electronic devices incorporating a liquid crystal display (LCD) more than 90% of the light emitted by the illumination source may end up being lost.…”

Section: Introductionmentioning

confidence: 99%

Light Recycling Using Perovskite Solar Cells in a Half‐Cylinder Photonic Plate for an Energy Efficient Broadband Polarized Light Emission

Ferreira

Martínez‐Denegri

Kramarenko

et al. 2021

Advanced Photonics Research

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Energy efficiency in many illumination devices is far from optimal. For instance, in liquid crystal displays, a large fraction of the emitted light is lost provided absorbing polarizers are used for the image formation. Herein, a light‐guiding structure to achieve diffuse polarized light emission from the top of the guide, combined with light harvesting and conversion back into electricity of the light with the unwanted polarization is proposed. Key in achieving such a double goal is the use of a half‐cylinder photonic plate for an ergodic light‐guided propagation incorporating a nonabsorbing reflective multilayer light polarizer and perovskite (PVK) solar cells. In the complex combination of micro‐ and nanometric dimensions of the proposed structure, light propagation was resolved using ray optics tracing interlaced with a full wave vector inverse integration approach. A broadband polarization extinction ratio of 0.1 for the light diffused from the top surface is demonstrated, while close to 90% of the s‐polarized light remains trapped and can be recycled back to electricity by the PVK solar cells placed on the front and back ends of the guide. PVK cells are shown to be optimal in such conversion with an overall efficiency ranging from 38 to 52%.

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Edge-lit LCD backlight unit for 2D local dimming

Cited by 26 publications

References 12 publications

Prospects and challenges of mini‐LED, OLED, and micro‐LED displays

Prospects and challenges of mini‐LED, OLED, and micro‐LED displays

Mini-LED Backlight Technology Progress for Liquid Crystal Display

Light Recycling Using Perovskite Solar Cells in a Half‐Cylinder Photonic Plate for an Energy Efficient Broadband Polarized Light Emission

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