Progress of LED backlights for LCDs

被引：94

作者：

Anandan, Munisamy ^{[1
]}

机构：

[1] Organ Lighting Technol LLC, Del Valle, TX 78617 USA

来源：

JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY | 2008年 / 16卷 / 02期

关键词：

LED; LCD; backlight; CCFL; dimming; PWM; image quality; backlight response; light guide; edge lit; directly lit; color gamut;

D O I：

10.1889/1.2841864

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Cold-cathode fluorescent lamps (CCFLs) are being used for LCD backlighting and is currently the dominant technology for LCD backlighting. However, recent attention has been given to LEDs as light sources for LCD backlighting because of their (i) long life, (ii) low-voltage operation, (iii) fast response time, and (iv) wide color gamut. This review article commences with the basics of LEDs as light sources and their limitations, followed by various backlight structures employing LEDs in cell phones, notebook computers, and LCD TVs. The description of the improvement in image quality on an LCD screen, stemming from the characteristics of LEDs, is also given. In conclusion, the possible rapid growth of LED backlights is outlined, thus gradually ending the domination of CCFL backlights.

引用

页码：287 / 310

页数：24