Patent ID: 7575357

Claim:
A backlight system, comprising: a light guide plate having an incidence surface; a first light source disposed adjacent to said incidence surface; a second light source disposed adjacent to said incidence surface, said second light source differing from said first light source, wherein said first light source and said second light source have two different operation temperature ranges; and a light-source driving module, wherein said light-source driving module comprises: a temperature sensor for detecting the environmental temperature and providing a temperature parameter; and a driving device for selectively driving said first light source and said second light source according to the temperature parameter and the operation temperature ranges, wherein the backlight system further comprises a third light source disposed adjacent to said incidence surface, wherein said first light source, said second light source, and said third light source are driven selectively by said light-source driving module according to the environmental temperature, wherein said first light source comprises an LED array, and said second light source and said third light source comprise CCFLs, and wherein said light-source driving module is configured to drive said first light source in response to the environmental temperature substantially lower than 50° C., said light-source driving module is configured to drive said second light source in response to the environmental temperature substantially between 50° C. and 80° C., and said light-source driving module is configured to drive said third light source in response to the environmental temperature substantially higher than 80° C.