Luminous Intensity Field Optimization for Antiglare LED Desk Lamp without Second Optical Element

Ye, Zhi Ting; Chang, Chi-Hsuan; Juan, Mao-Chieh; Chen, Kuei-Jung

doi:10.3390/app10072607

Cited by 6 publications

(7 citation statements)

References 7 publications

(7 reference statements)

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“…The LED desk lamp has an LED (Light Emitting Diode) as the light source, which has the advantages of energy saving, environmental protection, and long life (Ye et al, 2020). It has become one of the most commonly used lighting equipment in households, offices, and other indoor environments.…”

Section: Introductionmentioning

confidence: 99%

User Experience Enhancement Strategy of LED Desk Lamp Using IPA Model

Zhu,

Mohd Nazar,

Rusman

et al. 2023

E-BPJ

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LED desk lamps are widely used in modern life as one of the lighting products. However, only a few studies focus on the user experience (UX) of LED desk lamps. Therefore, this study adopts the importance-performance analysis (IPA) model, with the aim of exploring strategies to enhance the UX of LED desk lamps. We evaluated the key factors of UX based on the importance and actual performance of LED desk lamps for users. By analyzing the results, we proposed strategies to improve LED desk lamps, thereby potentially improving the consumer experience and market competitiveness of LED desk lamps.

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Section: Introductionmentioning

confidence: 99%

User Experience Enhancement Strategy of LED Desk Lamp Using IPA Model

Zhu,

Mohd Nazar,

Rusman

et al. 2023

E-BPJ

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“…The advantage of mini LEDs is their small size. Ye et al proposed a modified package structure for optimizing the light field type of mini LEDs, which can be used as a backlight source for display and lighting [ 26 , 27 ]. The Scholars have recently conducted extensive research on extremely small RGB micro-LEDs, which all use inorganic semiconductor materials.…”

Section: Introductionmentioning

confidence: 99%

Use of Recycling-Reflection Color-Purity Enhancement Film to Improve Color Purity of Full-Color Micro-LEDs

2022

Nanoscale Res Lett

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A common full-color method involves combining micro-light-emitting diodes (LEDs) chips with color conversion materials such as quantum dots (QDs) to achieve full color. However, during color conversion between micro-LEDs and QDs, QDs cannot completely absorb incident wavelengths cause the emission wavelengths that including incident wavelengths and converted wavelength through QDs, which compromises color purity. The present paper proposes the use of a recycling-reflection color-purity-enhancement film (RCPEF) to reflect the incident wavelength multiple times and, consequently, prevent wavelength mixing after QDs conversion. This RCPEF only allows the light of a specific wavelength to pass through it, exciting blue light is reflected back to the red and green QDs layer. The prototype experiment indicated that with an excitation light source wavelength of 445.5 nm, the use of green QDs and RCPEFs increased color purity from 77.2% to 97.49% and light conversion efficiency by 1.97 times and the use of red QDs and RCPEFs increased color purity to 94.68% and light conversion efficiency by 1.46 times. Thus, high efficiency and color purity were achieved for micro-LEDs displays. Graphical Abstract

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“…These advanced qualities in QDs could allow for smaller pixel sizes in micro-LED displays [4][5][6][7][8]. White-light-emitting materials are widely used in lighting and planar illuminator applications [9][10][11], and typically utilize inorganic phosphors containing rare earth elements (REEs) as their color conversion material. The current solution is not sustainable, as mining and utilization of REEs cause environmental and economic problems [12,13].…”

Section: Introductionmentioning

confidence: 99%

Wide-Angle Mini-Light-Emitting Diodes without Optical Lens for an Ultrathin Flexible Light Source

Chen

Chin²,

Tsai³

et al. 2022

Micromachines

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This report outlines a proposed method of packaging wide-angle (WA) mini-light-emitting diode (mini-LED) devices without optical lenses to create a highly efficient, ultrathin, flexible planar backlight for portable quantum dot light-emitting diode (QLED) displays. Since the luminous intensity curve for mini-LEDs generally recommends a beam angle of 120°, numerous LEDs are necessary to achieve a uniform surface light source for a QLED backlight. The light-guide layer and diffusion layer were packaged together on a chip surface to create WA mini-LEDs with a viewing angle of 180°. These chips were then combined with a quantum dot (QD) film and an optical film to create a high-efficiency, ultrathin, flexible planar light source with excellent color purity that can be used as a QLED display backlight. A 6 in (14.4 cm) light source was used as an experimental sample. When 1.44 W was supplied to the sample, the 3200-piece WA mini-LED with a flexible planar QLED display had a beam angle of 180° on the luminous intensity curve, a planar backlight thickness of 0.98 mm, a luminance of 10,322 nits, and a luminance uniformity of 92%.

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Luminous Intensity Field Optimization for Antiglare LED Desk Lamp without Second Optical Element

Cited by 6 publications

References 7 publications

User Experience Enhancement Strategy of LED Desk Lamp Using IPA Model

User Experience Enhancement Strategy of LED Desk Lamp Using IPA Model

Use of Recycling-Reflection Color-Purity Enhancement Film to Improve Color Purity of Full-Color Micro-LEDs

Wide-Angle Mini-Light-Emitting Diodes without Optical Lens for an Ultrathin Flexible Light Source

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