Innolux Corporation

Chia-Wei Hu

Chi-Liang Chang

Yen-Liang Chen

Chia-Feng Chen

A backlight module includes a plurality of first light emitting elements and a light guiding plate including a first side, a second side and a light output side having microstructures at least disposed in a near-light region of the light guiding plate. The near-light region is defined as from a first line to a predetermined second line at the light output side. The microstructure has a width P and height H, the light-guiding plate has a thickness T, a pitch between the adjacent first light-emitting elements is defined as P, a projection distance from a luminance measuring line of the backlight module to the first light-emitting elements is defined as A. Under the conditions 0&#x3c;A&#x2266;120 mm, 0&#x3c;[(H/P)/T]*P&#x2266;15 and 0&#x3c;luminance variation&#x2266;100%, the structure characteristic of the backlight module is bounded by a first equation: A=0.2{[(H/P)/T]*P}&#x2212;2{[(H/P)/T]*P}+105 mm and a second equation: A=0.2{[(H/P)/T]*P}&#x2212;2{[(H/P)/T]*P}+0.1 mm.

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Jhu-Nan, Taiwan

Chia-Wei Hu