| 摘要 |
An illuminated keyboard includes a light source, a key structure, and a backlight membrane switch module. The backlight membrane switch module is disposed under the key structure for generating a key signal and transferring a light beam from the light source to the key structure. The backlight membrane switch module includes a light guide plate and a membrane switch circuit board. The membrane switch circuit board is disposed over the light guide plate. Moreover, the membrane switch circuit board includes a wiring plate, a partition plate, and a light-shading part. The light-shading part is located at a side of the wiring plate or the partition plate, and bent downwardly to a position under the light guide plate in order to enclose a lateral surface of the light guide plate. Consequently, the problem of causing light leakage will be eliminated. |
| 主权项 |
1. An illuminated keyboard, comprising:
a light source for emitting a light beam; a key structure, wherein when said key structure is depressed, a key signal is correspondingly triggered; and a backlight membrane switch module disposed under said key structure for generating said key signal and transferring said light beam to said key structure, wherein said backlight membrane switch module comprises:
a light guide plate located at a side of said light source for guiding said light beam, and comprising a first circuit layer; anda membrane switch circuit board disposed over said light guide plate, and comprising a light-shading part and a second circuit layer, wherein said light-shading part is extended downwardly to a position under said light guide plate so as to prevent said light beam from being leaked out through a lateral surface of said light guide plate, wherein when said key structure is depressed, said second circuit layer of said membrane switch circuit board and said first circuit layer of said light guide plate are contacted with each other, thereby generating said key signal.
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