Luminous keyboard device

摘要

A luminous keyboard device includes plural keys, a light-emitting element, and a light guide plate. By the light guide plate, a light beam emitted by the light-emitting element is guided to the plural keys. The light guide plate includes plural elongated slots and a light-absorbing part. The plural elongated slots are located near a lateral edge of the light guide plate. After the light beam transferred within the light guide plate is transmitted through the elongated slots and departed from the light guide plate, the fraction of the light beam introduced into the lateral edge of the light guide plate is reduced. The light-absorbing part is located at the lateral edge of the light guide plate for absorbing the portion of the light beam which is introduced into the lateral edge of the light guide plate. Consequently, the lateral light leakage of the light guide plate can be avoided.

主权项

1. A luminous keyboard device, comprising:
a base; plural keys disposed over said base, and exposed outside a top surface of said luminous keyboard device, wherein each of said keys comprises a light-outputting zone; at least one light-emitting element arranged between said base and said plural keys for emitting at least one light beam; and a light guide plate disposed on said base and located at a side of said at least one light-emitting element for guiding said at least one light beam to said plural light-outputting zones of said plural keys, wherein said light guide plate comprises:
plural holes;plural elongated slots located near a lateral edge of said light guide plate, wherein after said light beam is transferred within said light guide plate and transferred to said elongated slots, a portion of said light beam is transmitted through said elongated slots and departed from said light guide plate; andat least one light-absorbing part located at said lateral edge of said light guide plate, wherein when said light beam is incident into said lateral edge of said light guide plate, said light beam is absorbed by said light-absorbing part.