A direct-light-type backlight module uses optical feedback to control point light sources for obtaining a default luminance. Each point light source drives a section in a cyclic time domain to emit a light. A photo detector detects a brightness and the brightness is thus controlled by the optical feedback from the photo detector.

 
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< Optical member, backlight unit and display apparatus

> Light guiding apparatus

> Discharge lamp device including an airtight container filled with a noble gas

~ 00560