Effects of Light-Emitting Diode (LED) Configuration on Luminance and Color of an Edge-Lit Backlight Unit

Moon, Joonho; Oh, Kyunghwan

doi:10.1109/jdt.2015.2443374

Cited by 12 publications

(2 citation statements)

References 32 publications

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“…The edge-lit structure has thinner profiles and is cheaper due to lesser requirement of an LED chip, while the direct-lit structure provides higher brightness, better luminescence efficiency, and potential local dimming abilities. In general, edge-lit BLUs are preferred options for mobile devices, laptop screens, and cell phones due to thickness, weight, and cost (Moon and Oh, 2015).…”

Section: Liquid Crystal Displaymentioning

confidence: 99%

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Singh

Chen

Singh

et al. 2022

Front. Nanotechnol.

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The technology behind the display is becoming ever more prevalent in our daily lives. It has many applications, including smartphones, tablets, desktop monitors, TVs, and augmented reality/virtual reality devices. The display technology has progressed drastically over the past decade, from the bulky cathode ray tube to the flat panel displays. In the flat panel displays, the liquid crystal display (LCD) and organic light-emitting diodes (OLEDs) are the two dominant technologies. Nevertheless, due to low stability and color tunability, OLEDs remain behind the LCDs. The LCD screen has a backlight, usually a white LED, which comprises a blue LED covered with a red and green enhanced layer (color-converting layers). Although InP/CdSe QDs attracted more attention due to their solution processability and better color gamut than the previous technologies, the complexity of their synthesis was still an obstacle to their commercialization. Later, the emergence of perovskite with highly intense and tunable PL emission, high color purity, and low-cost synthesis route attracted the attention of display researchers. Owing to the relatively higher performance of perovskite quantum dots (PQDs) than that of bulk (3D) perovskite in backlit display devices, these PQDs are being used for high color contrast and bright display devices. Furthermore, the color gamut for PQDs was observed as 140% of the NTSC standard, that is, close to that of the commercial OLED devices. In this review, we have discussed the progress of display technologies with a clear classification of the pros and cons of each technology. Also, the application of perovskite QD/nanomaterials in LCD backlit devices has been discussed, and the future direction of further improvement in their stability and performance has been listed.

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Section: Liquid Crystal Displaymentioning

confidence: 99%

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Singh

Chen

Singh

et al. 2022

Front. Nanotechnol.

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“…Despite this, it was shown that the extended IAD method estimates volume scattering parameters which predict the scattered intensity distributions of experimental samples with better accuracy. For lighting luminaires and display backlights, luminance is the fundamental quantity to investigate and optimize [15,16]. In addition to the angular information of the scattered light distribution, the luminance also encompasses the spatial information.…”

Section: Introductionmentioning

confidence: 99%

Determination of volume scattering parameters that reproduce the luminance characteristics of diffusers

et al. 2016

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The extension of a well-known inverse technique, inverse adding-doubling (IAD), is investigated for determining the volume scattering properties of diffusers for display and lighting applications. The luminance characteristics of volume scattering diffusers are vital for these applications. Through a simulation study, it is shown that fitting solely to the scattered (angular) intensity information with the extended IAD method, results in a volume scattering characterization that also reproduces the correct (spatial and angular) luminance characteristics for a wide range of samples. The gap between the simulation work and the experimental application of the investigated fitting procedure is bridged by considering the effect of experimental error in the scattered intensity distributions. This does not significantly alter the presented conclusions.

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Development of a miniaturized photometer with paired emitter-detector light-emitting diodes for investigating thiocyanate levels in the saliva of smokers and non-smokers

Seetasang

Kaneta

2019

Talanta

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Effects of Light-Emitting Diode (LED) Configuration on Luminance and Color of an Edge-Lit Backlight Unit

Cited by 12 publications

References 32 publications

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Progress of Backlight Devices: Emergence of Halide Perovskite Quantum Dots/Nanomaterials

Determination of volume scattering parameters that reproduce the luminance characteristics of diffusers

Development of a miniaturized photometer with paired emitter-detector light-emitting diodes for investigating thiocyanate levels in the saliva of smokers and non-smokers

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