A LEDs light system based on color coordinates feedback for the projector

Author

Xiangjun, Zhang ; Yijie, Wang ; Zhiwei, Lv ; Dianguo, Xu

Author_Institution

Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China

fYear

2010

fDate

10-13 Oct. 2010

Firstpage

68

Lastpage

72

Abstract

A novel solution for projector light source was proposed. With this solution, the light splitting sets was cancelled, the excessive light loss can be avoided. In the proposal method, three kinds of LEDs placed in front of the different incident face of the X prism were driven by different current with the purpose of obtaining the mixed white light for liquid crystal board (LCD). Three buck converters were used to adjust the drive current for each channel of LEDs according to the control signal from the coordinate´s feedback. The designed LEDs driving system for projector has been verified by the experiment.

Keywords

LED lamps; liquid crystal devices; optical projectors; power convertors; LCD; LED light system; buck converter; color coordinate; light splitting; liquid crystal board; projector light source; Circuit faults; Color; Converters; Image color analysis; Integrated circuits; Light emitting diodes; Pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2010 International Conference on

Conference_Location

Incheon

Print_ISBN

978-1-4244-7720-3

Type

conf

Filename

5663925