| CPC G02B 6/0055 (2013.01) | 13 Claims |
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1. An illuminated keyboard, comprising:
a membrane circuit board;
a base plate, disposed beneath the membrane circuit board, and the base plate having a first through hole and a plurality of second through holes adjacent to the first through hole;
a key structure, disposed over the membrane circuit board, and including an elastic member and a keycap disposed over the elastic member;
a backlight module, disposed beneath the base plate, and the backlight module comprising:
a direct-type light-emitting element, substantially aligned with the first through hole of the base plate and misaligned with a trigger portion of the elastic member, wherein the direct-type light-emitting element is configured to project a light beam directly upward; and
a light guide plate, laterally adjacent to the direct-type light-emitting element; and
a first reflective layer, disposed over the direct-type light-emitting element, and disposed over, beneath, or over and beneath the membrane circuit board, and substantially aligned with and disposed on the first through hole of the base plate, wherein the first reflective layer fully covers the first through hole of the base plate and a top surface of the direct-type light-emitting element to reduce brightness in a central region of the keycap and to reflect the light beam to the light guide plate.
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