Patent ID: 9496104
Filing Date: 2016-11-15
CPC Classification: G02B,H01H

Claim Text:
1. A luminous keyboard, comprising: a keypad module exposed to a top surface of the luminous keyboard; at least one light-emitting element disposed under the keypad module, and emitting at least one light beam; an illumination circuit board disposed under the keypad module, and supporting the at least one light-emitting element, wherein the illumination circuit board comprises a circuit board main body and a protective layer, wherein the circuit board main body is electrically connected with the at least one light-emitting element, the at least one light-emitting element is supported on the circuit board main body, and the protective layer is disposed on a top surface of the circuit board main body to protect the circuit board main body; and a light guide plate disposed under the keypad module, wherein the at least one light beam is subjected to total internal reflection within the light guide plate and guided to the keypad module by the light guide plate, wherein the protective layer has a light amount control structure, and the light amount control structure is disposed on a top surface of the protective layer, wherein when the at least one light beam is projected on the illumination circuit board, a reflected fraction of the at least one light beam is reduced by the light amount control structure, wherein the light amount control structure is arranged between the circuit board main body and the light guide plate, and exposed to a region between the at least one light-emitting element and the light guide plate, wherein the light amount control structure increases a number of times of reflecting the at least one light beam so as to reduce the reflected fraction of the at least one light beam, wherein the light amount control structure is a texturing structure that is integrally formed with the protective layer.