Title :
A novel adaptive dimming technique with X-Y channels for LED backlight system of LCD TVs
Author :
Won-Sik Oh ; Kyu-Min Cho ; Daeyoun Cho ; Gun-Woo Moon ; Byungchoon Yang ; Taeseok Jang
Author_Institution :
Display Res. Center, Daejeon
Abstract :
A novel adaptive dimming technique with X-Y channels for light emitting diode (LED) backlight system of LCD TVs is proposed. It has matrix structured LED modules with row and column switches to control the brightness of individual division block. It shows local dimming effects such as reduced power consumption and high dynamic contrast ratio with even using much fewer number of LED drivers of proposed method than that of conventional local dimming method. Therefore, low cost and compact design of LED drivers can be achieved. This paper also contains a new adaptive dimming algorithm and image compensation technique for proposed system.
Keywords :
brightness; driver circuits; image processing; light emitting diodes; liquid crystal displays; television displays; LCD TV; LED backlight system; LED drivers; X-Y channels; adaptive dimming technique; brightness control; image compensation technique; light emitting diode; Brightness; Costs; Energy consumption; Fluorescent lamps; Light emitting diodes; Liquid crystal displays; Modems; Multimedia systems; Power electronics; Switches;
Conference_Titel :
Power Electronics, 2007. ICPE '07. 7th Internatonal Conference on
Conference_Location :
Daegu
Print_ISBN :
978-1-4244-1871-8
Electronic_ISBN :
978-1-4244-1872-5
DOI :
10.1109/ICPE.2007.4692480