Challenges in the design of a RGB LED display for indoor applications

Nguyen, Francis

doi:10.1016/s0379-6779(00)01341-2

Cited by 22 publications

(8 citation statements)

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“…Recently, there has been much progress in the fabrication and performance of optical devices based on Group III-Nitride technology [1,2]. Blue/ green LEDs grown by Organometallic Vapor Phase Epitaxy (OMVPE) using InGaN/GaN Multiple Quantum Well (MQW) structures are already commercially available.…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of InxGa1−xN MQW using a novel method of temperature gradient OMVPE

Johnson

Jorgenson²,

et al. 2004

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

Growth and characterization of InxGa1−xN MQW using a novel method of temperature gradient OMVPE

Johnson

Jorgenson²,

et al. 2004

Journal of Crystal Growth

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“…Compared with conventional light bulbs, LEDs conserve more energy, have a lower damage rate and have a longer service life [5,6]. LED traffic signals and information displays provide clear messages to the public [7][8][9]. No general rules have been established for the design of LED destination indicators mounted on the front of public buses in Taiwan.…”

Section: Introductionmentioning

confidence: 99%

Legibility of Light-Emitting Diode Destination Indicators Mounted on the Front of Public Buses

Cho

Lin

et al. 2019

Symmetry

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Light-emitting diode (LED) destination indicators mounted on the front of buses enable pedestrians to quickly identify bus numbers. In this study, the factors affecting their legibility were investigated. We aimed to deduce the process of enhancing the legibility of LED destination indicators. Combinations of different text colors, text fonts and information display locations were investigated in this study. Significant differences were observed at the longest visual range when these combinations were used. The optimal information display was obtained using the New Johnston Medium typeface with yellow font color on a black background. For the glare distance, significant differences were observed when different information display locations were used. Superior results were obtained when information was centered. This study is of practical importance to people who depend on public transport, especially those in an emergency. In the future, these results can be used as a guide for designing LED destination indicators that are mounted on the front of public buses.

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“…So LED display can be classified by many methods. If it was sorted by color, there are monochrome screen monochrome screen, double color screen and full color screen; if it was sorted by the application place, there are outdoor screen and indoor screen; and if it was sorted by the control mode ,it can be divided into synchronous control panel and asynchronous control panel [3,4] . The structure of a full-color LED display system which can play video is shown in figure 1, mainly includes a computer, a DVI graphics, a data sending card, a synchronous data receiving card, a HUB board, some cables, LED display, etc [5] .…”

Section: Introductionmentioning

confidence: 99%

Full-color LED display research based on chip on board(COB) package

2014

2014 15th International Conference on Electronic Packaging Technology

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LED display industry has entered an integrated period with the characteristics of more mature technology of every aspect and higher demand for the quality of LED display. LED display are developing in the direction of the high resolution, high density, small pixel pitch, intelligent. So the demand for the LED display screen manufacturing technology, especially the LED display module package is higher and higher, the pixel pitch of current LED display are below 2.5 mm(P2.5), some can reach P2, P1.5, P1.0 and even less. However, the current LED display with high definition and small pixel pitch used reflow soldering to mount surface mounted device three-in-one onto the printed circuit board. It's mature and widely used to manufacture LED display by this way, but there are many problems by using these discrete LED components to manufacture the LED display of high density, such as the poor reliability, the bad yield and the heat dissipation problem. Described in this paper, a new integrated packaging method called COB package--mounting the LED chips directly to the module substrate, and then doing the whole molding, will reduce the process and manufacturing cost greatly, improve the reliability and show better picture quality. COB packaging method will be a trend of LED display package in the future.

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Challenges in the design of a RGB LED display for indoor applications

Cited by 22 publications

References 0 publications

Growth and characterization of InxGa1−xN MQW using a novel method of temperature gradient OMVPE

Growth and characterization of InxGa1−xN MQW using a novel method of temperature gradient OMVPE

Legibility of Light-Emitting Diode Destination Indicators Mounted on the Front of Public Buses

Full-color LED display research based on chip on board(COB) package

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