An illuminated glass keycap having a glyph diffuser layer that may diffuse light through a glyph window opened in a background layer. The background layer may be opaque and the glyph window may be transparent. The keycap is adhered to a scissor mechanism positioned above electrical switch circuitry. Included within, below, or adjacent to the scissor mechanism may be one or more light sources positioned to emit light through the keycap, around the perimeter of the keycap, and/or through the background layer.

An illuminated glass keycap having a glyph diffuser layer that may diffuse light through a glyph window opened in a background layer. The background layer may be opaque and the glyph window may be transparent. The keycap is adhered to a scissor mechanism positioned above electrical switch circuitry. Included within, below, or adjacent to the scissor mechanism may be one or more light sources positioned to emit light through the keycap, around the perimeter of the keycap, and/or through the background layer.

An illuminated keyboard with an optical switch is provided. The illuminated keyboard includes a circuit board and plural keys. The circuit board includes plural light-emitting elements. Each light-emitting element is aligned with the corresponding key. The key includes a keycap, a housing, a triggering post, a light guide element and a light guide frame. The keycap is located over the housing. The triggering post, the light guide element and the light guide frame are disposed within the housing. Moreover, the light guide frame is arranged around the triggering post. After a light beam emitted by the light-emitting element is introduced into the housing, the light beam is guided to the light guide frame by the light guide element, and the light beam is scattered to a region around the triggering post and outputted from the keycap.

A fusible link unit includes: a fuse element including a plurality of fusible portions arrayed in a predetermined array direction; a housing having a window portion penetrating the housing in an intersecting direction to intersect the array direction; and fusible portion covers attached to the housing. The housing holds the fuse element to locate the fusible portions inside the window portion. The fusible portion covers includes a first cover that is transparent and has a plate shape extending in the array direction and covering one opening of the window portion and a second cover that is non-transparent and having a plate shape extending in the array direction and covering the other opening of the window portion. A length of the first cover in the array direction is different from a length of the second cover in the array direction.

A character concealable keycap module includes a first cap structure, a light covering layer, and a second cap structure. The first cap structure is made of a transparent material and located above a backlight module. The light covering layer covers the first cap structure and has a patterned hollow area that defines a transparent character area on the first cap structure. The second cap structure has a transmittance lower than that of the first cap structure, and is disposed above the first cap structure to cover the light covering layer. When the backlight module is not switched on, the transparent character area is not visible through the second cap structure. When the backlight module is switched on, light emitted from the backlight module passes through the second cap structure, and the transparent character area is visible through the second cap structure.

A method of manufacturing a translucent keycap is firstly to form a translucent base layer to overlay a top surface and a skirt side surface of a translucent main body. Next, a light-shielding layer is formed to overlay the translucent base layer. Subsequently, a removable intermediate layer is formed to at least overlay the light-shielding layer located on the top surface. Afterward, on the removable intermediate layer over the top surface, a hollowed region is formed through the removable intermediate layer and the light-shielding layer such that the translucent base layer is exposed within the hollowed region. Then, a colored translucent layer is partially formed to cover the hollowed region and the removable intermediate layer located on a peripheral of the hollowed region. Finally, the removable intermediate layer and the colored translucent layer covering the removable intermediate layer located on the peripheral of the hollowed region are removed together.