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US08382303B2 Keypad module for portable electronic device 失效
便携式电子设备的键盘模块

Keypad module for portable electronic device
Abstract:
A keypad module includes a light source, a light guide plate and a keypad. The light guide plate includes a plurality of coarse surfaces. The keypad forms a plurality of ribs corresponding to the coarse surfaces. The light source is positioned in the light guide plate, the coarse surfaces and the ribs guiding light of the light source to uniform on the light guide plate.
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