共查询到15条相似文献，搜索用时 65 毫秒
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在国内照明领域,尤其是汽车照明领域,雪莱特是一块响当当的金字招牌。近日,本刊在走访位于佛山的广东雪莱特光电,与电汽车照明事业部总经理刘火根及其团队就国内汽车照明市场的发展进行互动时,他们认为,渠道的扁平化与LED等新技术的发展,将对未来国内汽车照明市场产生深远的影响。 相似文献
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目前,多路照明LED正在被广 泛的应用,但每个LED都是配有一个单独的驱动源,为了能够控制多路LED的配合工作,所以进行了实验研究.实验采用的方 法是:计算机给单片机发出 调光信号,调光电路中通过C D4067来进行多路选择,单片机产生PWM调节电流值,其中调光电路又采用了调解工作电流方式和脉宽调制方式两种 方法.通... 相似文献
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Joseph Notaro 《传感器世界》2021,27(2):34-35
汽车技术是当前变化最快的市场领域之一,几乎汽车中的所有应用都在再创,以提高经济性,减少排放,提高安全性和增强联接性.汽车照明技术也日益智能化,尤其是LED技术的发展,使汽车照明进入新里程.因此汽车照明是汽车行业重要的大趋势之一,也是半导体制造商投资的领域,将在便利性、安全性以及个性化方面为现代车辆提供更加精密、智能的照... 相似文献
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分析将高亮度LED应用于汽车照明系统的关键问题,提出基于PIC16F873A和LT3476实现汽车照明系统的电路设计方案。该方案具有节能、高效、低成本等特点,有效抑制了高亮度LED阵列应用中的热辐射和开关噪声问题,为设计更为高效的汽车照明系统提供了新的解决方案,具有一定的应用价值。 相似文献
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Yoshihiko Muramoto Masahiro Kimura Akihiko Dempo Suguru Nouda Yuuya Fukawa Shiro Sakai 《Journal of the Society for Information Display》2011,19(12):907-912
Abstract— Progress in the development of blue light‐emitting diodes and yellow phosphor has led to the realization of solid‐state lighting. The development was followed by improvement in the luminous efficacy of ultraviolet light‐emitting diodes (UV‐LEDs). By using near‐UV‐LEDs (n‐UV‐LEDs) excited light for red, green, and blue (RGB) phosphors, a new type of solid‐state lighting was realized. An innovative method for increasing the efficiency of LEDs by using a silicon nitride layer as the active layer and piling them up to a nano‐sized level with nano‐sized holes has been developed. 相似文献
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林晔琳 《数码设计:surface》2010,(12):225-227
随着LED照明产品日渐普及的今天,设计此类产品所要关注的不仅是技术和外观方面等因素,更需要情感化的设计去实现人们内心的丰富需求。本文从LED照明产品中所涉及的外形、色彩、材质及功能的情感化设计进行探讨,藉此分析并且展望当今和未来的LED照明产品将如何构建出人、光、物(产品)之间的和谐关系。 相似文献
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Ruibo Lu Xiangyi Nie Shin‐Tson Wu 《Journal of the Society for Information Display》2008,16(11):1139-1145
Abstract— The color performance, including color gamut, color shift, and gamma curve, of a multi‐domain vertical‐alignment (MVA) liquid‐crystal display (LCD) using an LED backlight are calculated quantitatively. Simulation results indicate that an LED backlight exhibits better angular color uniformity and smaller color shifts than a CCFL backlight. Color gamut can be further widened and color shift reduced when using a color‐sequential RGB‐LED backlight without color filters, while the angular‐dependent gamma curves are less influenced using different backlights. The obtained quantitative results are useful for optimizing the color performance and color management of high‐end LCD monitors and LCD TVs. 相似文献
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Abstract— Backlight dimming is a dominant method for power reduction in LCDs. Image processing with a simple boost and clip can compensate for such dimming‐restoring image brightness. We propose a low complexity approach which replaces hard clipping with smooth roll‐off to reduce clipping artifacts. An additional high‐quality approach uses a two‐channel spatial‐frequency decomposition to preserve highlight detail attenuated by the roll‐off. Image quality is improved and power savings can be increased by more‐aggressive backlight dimming. 相似文献
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Hüseyin Murat An Gielen Herbert De Smet 《Journal of the Society for Information Display》2007,15(7):519-526
Abstract— LEDs are totally different from classical light sources: they have a different shape, radiation pattern, driving requirements, etc. Therefore, the illumination engine, which determines the brightness and uniformity of the system, has to be redesigned for LED‐based projectors. A compact illumination system based on gradually tapered light pipes (GTLP) will be presented. The GTLP collects, reshapes, and uniformizes the light flux from the LED to illuminate the light‐valve uniformly. The design and the simulations have been completed. The result is a uniformly illuminated rectangular beam at the end of the pipe with an efficiency of 81.1%. Afterwards, the light pipe was fabricated, and the experimentally measured efficiency is 76.9%, which demonstrates a successful manufacturing process. Finally, two recycling techniques to enhance the brightness have been applied and these enhancements were experimentally observed. 相似文献
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Matthias Bues Achim Pross Oliver Stefani Silvia Frey Doreen Anders Jakub Späti Anna Wirz‐Justice Ralph Mager Christian Cajochen 《Journal of the Society for Information Display》2012,20(5):266-272
Abstract— In commodity LC flat‐panel displays, the traditional CCFL backlight is being replaced more and more by LEDs. The typical spectrum of LED‐lit displays shows a significantly higher amount of blue light in the range around 464 nm. Blue light in this wavelength area suppresses the melatonin level in humans and thus effects the biological clock. Our hypothesis was that the amount of blue light reaching the human eye from a LED‐backlit display is sufficient to have a significant effect on the biological clock. The results of clinical user studies comparing the effects of LED‐ vs. CCFL‐backlit displays on humans, resulting from the emitted amount of 464‐nm light, will be presented. It was found that the LED‐backlit display causes significant suppression of melatonin, which effects the biological clock of the test persons, indicating the necessity for displays with a controllable 464‐nm emission. A technical concept for a display with such functionality will be presented. 相似文献
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Wonbok Lee Kimish Patel Massoud Pedram 《Journal of the Society for Information Display》2009,17(1):37-45
Abstract— A 1‐D LED‐backlight‐scanning technique and a 2‐D local‐dimming technique for large LCD TVs are presented. These techniques not only reduce the motion‐blur artifacts by means of impulse representation of images in video, but also increase the static contrast ratio by means of local dimming in the image(s). Both techniques exploit a unique feature of an LED backlight in large LCD TVs in which the whole panel is divided into a pre‐defined number of regions such that the luminance in each region is independently controllable. The proposed techniques are implemented in a Xilinx FPGA and demonstrated on a Samsung 40‐in. LCD TV. Measurement results show that the proposed techniques significantly reduce the motion‐blur artifacts, enhance the static contrast ratio by about 3×, and reduce the power consumption by 10% on average. 相似文献
