| 摘要 |
An edge-type backlight module includes a light source and a light guide plate having a lateral side. The light source is installed on the lateral side of the light guide plate. The light guide plate includes a first and a second prism structure for scattering the light emitting out of the light guide plate. The first prism structure includes a first light exit plane and a second light exit plane. A first angle is formed between the first light exit plane and the second light exit plane. The second prism structure includes a third light exit plane and a fourth light exit plane. A second angle is formed between the third light exit plane and the fourth light exit plane. The first angle is different from the second angle.
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