Two-step optimization for a pattern array to improve light extraction efficiency and uniformity in light guide plates

Guo, Quansheng; Ye, Yun; Chen, Enguo; Xu, Sheng

doi:10.1364/ao.58.009178

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…𝐸 𝑐𝑒𝑙𝑙 (𝑖) (4) which results in the optimisation of the uniformity obtained at the output. In addition, the scatterers are distributed within each cell according to an r-cut molecular dynamics algorithm [6,7], which avoids the presence of the Moire effect on the output illuminance map.…”

Section: Simulation Modelmentioning

confidence: 99%

“…These simulators calculate the interaction of the rays with all the surfaces of the scatterers and the LPG, allowing the evaluation of the illuminance map at the output of the system with high accuracy [2]. By combining these simulation tools with iterative optimisation algorithms based on the density of points in different regions of the LGP [3,4], it is possible to obtain patterns that maximise the uniformity and output efficiency. However, the use of these ray-tracing simulators results in high computation times and memory consumption, as they require the simulation of all the ray interactions within the LGP at every iteration of the optimisation process.…”

Section: Introductionmentioning

confidence: 99%

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Optimized pattern design of a light guide using 2D ray-tracing simulation

Medrano,

Jimenez,

Tainta

et al. 2023

Digital Optical Technologies 2023

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We propose the use of a simplified model for the analysis of the scattering elements used in edge-lit systems. By modelling their behaviour as lambertian light sources whose properties depend on the size and geometry of the scatterer and LGP, it is possible to simulate the illuminance map of the edge-lit structure using only 2D ray-traced simulation. This reduces the computational complexity in the optimisation process used to calculate the scatterers distribution to achieve maximum uniformity in light extraction. The results obtained by comparison between the proposed algorithm and a commercial software demonstrate the validity of the proposal.

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Section: Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized pattern design of a light guide using 2D ray-tracing simulation

Medrano,

Jimenez,

Tainta

et al. 2023

Digital Optical Technologies 2023

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show abstract

“…The edge-lit Mini-LED backlight unit (BLU) installs the light sources on the side of the light guide plate (LGP). The incident light is exported through a scattering dots array on LGP and then spread to the LC layer to provide uniform light output [19,20]. The light sources of the direct-lit Mini-LED BLUs are regularly arranged on the backplane to form a Mini-LED array to regulate the brightness of the dimming unit [21].…”

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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Design of flexible optical waveguide with high uniformity and efficiency for light therapies

Wang

Dong

2022

Optics and Lasers in Engineering

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Two-step optimization for a pattern array to improve light extraction efficiency and uniformity in light guide plates

Cited by 6 publications

References 22 publications

Optimized pattern design of a light guide using 2D ray-tracing simulation

Optimized pattern design of a light guide using 2D ray-tracing simulation

Mini-LED Backlight Technology Progress for Liquid Crystal Display

Design of flexible optical waveguide with high uniformity and efficiency for light therapies

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