YUANNENGJI 傳統 CCFL 是一種管狀光源, 需要相當複雜的輔助元件來將其發出的光均勻分布到 ??面板的每個區域. 螢幕厚度也難以控制, 隨著面板尺寸增加, 必須使用多個光源, 這進一步增加了設計的複雜性和成本. 大屏幕液晶電視對此更為敏感.
LED 背光光源的使用壽命可達 100,000 小時, 即使每天連續使用 10 小時, 也能長時間持續使用 27 年. 普通 CCFL 背光光源的使用壽命約為 25,000 小時, 而最新頂級 CCFL 背光的光源壽命僅為 60,000 小時. 在壽命末期, 液晶螢幕的亮度會顯著下降, and the CCFL backlight module of the LCD screen must be replaced to achieve a wider color gamut.
Displays using LED backlight sources are easier to improve the color gamut, and the color gamut improvement is more energy-saving. The energy-saving effect of LED backlight sources can generally save 40% of electricity compared to civilian-grade products of the same specifications. According to Rich’s evaluation data, some high-quality LED backlight displays save more than 60% energy than mainstream CCFL, which is very energy-saving.
LED backlight is composed of many grid-shaped semiconductors, each “grid” has an LED semiconductor, so that the light source can be successfully flattened. Its flattened light source not only has excellent brightness uniformity, but also does not require complex optical path design, so that the thickness of the liquid crystal can be made thinner and lighter, while also having higher reliability and stability.
LED backlight has the characteristics of more uniform light emission, far exceeding CCFL backlight in color expression, which can well make up for the problem of insufficient display color in LCD technology, easily achieve NTSC118% or even higher wide color gamut, and let LCD display truly restore the colorful colors in nature. The service life of LED backlight can reach 100,000 小時, even if it is used continuously for 10 小時, 也能長時間持續使用 27 年.
因此, after long-term use, the backlight brightness attenuation of LCD monitors or LCD TVs using LED backlight is better than CCFL backlight. The service life of ordinary CCFL backlight is about 25,000 小時, 而最新頂級 CCFL 背光的光源壽命僅為 60,000 小時. At the end of its service life, LCD 的亮度會顯著下降, LCD 的 CCFL 背光模組必須更換.
LED 背光完全沒有這個問題. 目前, 白光 LED 背光的實際使用壽命為 50,000 至 100,000 小時, 這基本上與 LCD 顯示屏的使用壽命相同, 而且仍有進一步提升的潛力. LED 發光二極體是固態半導體器件，可以直接將電能轉換為光.
LED 的核心是一個半導體晶片, 其一端安裝在支架上, 一端為負極, 另一端連接電源正極, 使整個晶片被環氧樹脂封裝. 半導體晶片由兩部分組成, 一端為 P 型半導體, in which holes dominate, and the other end is an N-type semiconductor, in which electrons are mainly. But when these two semiconductors are connected together, a “P-N junction” is formed between them. When current flows through the wires and acts on the chip, electrons are pushed to the P region, where electrons and holes recombine.