A back light module is applied to a lighting keyboard with a plurality of keyswitches and includes a lighting unit, a light guide plate, a light penetrating membrane, a light calibration layer and an adhering component. The light guide plate has an opening used to accommodate the lighting unit. The light penetrating membrane is disposed on the light guide plate. The light calibration layer is disposed on the light penetrating membrane and has a second contour. The adhering component is disposed between the light guide plate and the light penetrating membrane, and has a first contour greater than the second contour. The adhering component includes a front region, a rear region and a hollow region. The front region is covered by the light calibration layer. The rear region is partly covered or not covered by the light calibration layer. The hollow region corresponds to and is larger than the opening.

A backlight module adapted to an illuminated keyboard is provided. The backlight module includes a light source assembly, a light guide film, and a reflective sheet. The light guide film has a top surface, a bottom surface, a through hole and a light-exit pattern. The light source assembly includes a light-emitting component configured to emit light toward the through hole. A size of the through hole is smaller than a size of the light-emitting component. The light-exit pattern is on the bottom surface and encloses the through hole. The reflective sheet is located above the through hole. A size of the reflective sheet is larger than or equal to the size of the through hole. A distance from the through hole to an outer edge of the light-exit pattern is greater than a distance from to the through hole to an outer edge of the reflective sheet.

An illuminant keyboard and a method thereof are provided. A plurality of protruding walls substantially parallel to each other are disposed on one of an upper surface of the transparent plate, a lower surface of the transparent plate and an upper surface of the planar light source. The protruding walls may be either I-shaped, L-shaped, U-shaped or square-shaped. When the protruding walls are made of an opaque material, the protruding walls can effectively reduce the intensity of the halo light surrounding a transparent keycap. When the protruding walls are made of a transparent material with a designated color, the halo light surrounding the keycap will be modulated with the designated color.

A backlight keyboard includes a first keyswitch, a first backlight source, a light guide plate and a first board having first and second holes. The light guide plate is applied to the backlight keyboard and a second backlight keyboard including a second keyswitch, a second backlight source and a second board having third and fourth holes. The second keyswitch on the second backlight keyboard is shifted transversely relative to the first keyswitch on the backlight keyboard to make the first and fourth holes have a first overlapping area. The light guide plate has a first dot structure corresponding to the first and third holes and a second dot structure corresponding to the second and fourth holes except the first overlapping area for guiding light to symbols on the first and second keyswitches. The first dot structure is less than the second dot structure in dot intensity.

Keycaps for keyboards that have transparent top portions have a set of layered components to define a top surface that provides key definition by curvature, texture, ridges, or other external structural features. Other portions of the keycaps define a glyph or support structure for the top layer. Features such as angle filters and partially reflective materials are implemented to improve the visibility, contrast, and reflectivity of the keycaps. Multiple methods are used to bend or otherwise modify rigid transparent materials such as glass in order to add surface features and to improve aesthetics of the keycaps of a keyboard.

Keycaps for keyboards that have transparent top portions have a set of layered components to define a top surface that provides key definition by curvature, texture, ridges, or other external structural features. Other portions of the keycaps define a glyph or support structure for the top layer. Features such as angle filters and partially reflective materials are implemented to improve the visibility, contrast, and reflectivity of the keycaps. Multiple methods are used to bend or otherwise modify rigid transparent materials such as glass in order to add surface features and to improve aesthetics of the keycaps of a keyboard.

A backlight module is adapted to an illuminated keyboard. The backlight module includes a light source assembly and a light guide film. The light guide film has a top surface, a bottom surface, a through hole, a light-incident pattern and a light-exit pattern. The light source assembly includes a light-emitting component configured to emit light toward the through hole. A size of the through hole is smaller than a size of the light-emitting component. The light-incident pattern is located on at least one of the top surface and the bottom surface. The light-exit pattern is located on the bottom surface. A distance from the through hole to the light-exit pattern is greater than a distance from the through hole to the light-incident pattern.

A backlight module adapted to an illuminated keyboard is provided. The backlight module includes a light source assembly, a light guide film, and a reflective sheet. The light guide film has a top surface, a bottom surface, a through hole and a light-exit pattern. The light source assembly includes a light-emitting component configured to emit light toward the through hole. A size of the through hole is smaller than a size of the light-emitting component. The light-exit pattern is on the bottom surface and encloses the through hole. The reflective sheet is located above the through hole. A size of the reflective sheet is larger than or equal to the size of the through hole. A distance from the through hole to an outer edge of the light-exit pattern is greater than a distance from to the through hole to an outer edge of the reflective sheet.

A luminous key comprises a key cap, a bottom plate, a first circuit component and a second circuit component. The key cap comprises a body, an extension part and a light exiting part. The extension part is disposed at the periphery of the body. The light exiting part is disposed on the body. The bottom plate has a through hole. The first circuit component has a first layer, a second layer and a light emitting unit. The first layer is disposed on the second layer. The light emitting unit is disposed between the first layer and the second layer, and the light emitting unit is corresponding to the through hole. The second circuit component is disposed between the key cap and the bottom plate. A lifting structure is disposed between the key cap and the bottom plate. Light adjusting structures define a light adjusting region. An orthographic projection of the light adjusting region towards the second layer covers at least a portion of the light emitting unit.

A backlight module is adapted to an illuminated keyboard. The backlight module includes a light source assembly and a light guide film. The light guide film has a top surface, a bottom surface, a through hole, a light-incident pattern and a light-exit pattern. The light source assembly includes a light-emitting component configured to emit light toward the through hole. A size of the through hole is smaller than a size of the light-emitting component. The light-incident pattern is located on at least one of the top surface and the bottom surface. The light-exit pattern is located on the bottom surface. A distance from the through hole to the light-exit pattern is greater than a distance from the through hole to the light-incident pattern.