A light-transmissible keycap and the manufacturing method thereof are provided. The light-transmissible keycap has multiple light-transmissible symbol areas, and each light-transmissible symbol area has at least one character assigned with a color. Each light-transmissible symbol area is covered with only one light-transmissible color layer. Thus, when an external light is emitted from a light source beneath the keycap, the external light will only pass through one light-transmissible color layer covering that light-transmissible symbol area, and not pass through the light-transmissible color layer covering the other light-transmissible symbol area. Therefore, a bleeding problem due to multiple light-transmissible color layers overlapped and covering the same light-transmissible symbol area is avoided.

A method for inputting a character is provided. The method includes: receiving a first character input by a user; determining a character set associated with the first character, the character set including a second character; obtaining a key identifier corresponding to the second character based on a corresponding relationship between the second character and the key identifier; and causing a key light corresponding to a key identified by the key identifier to emit light with a preset color.

A multicolor illumination keyboard includes a light-emitting element, a color filter and plural keys. The plural keys are located above the light-emitting element. The color filter is arranged between the plural keys and the light-emitting element. After a source light emitted by the light-emitting element passes through the color filter, plural color lights are generated. The plural color lights are outputted from the plural keys. Consequently, the plural keys are illuminated in a multicolor manner.

A keyboard key structure includes a plurality of keycaps. Each keycap has a keycap body and an outward layer. The keycap body has an appearance with a first color. The outward layer has an appearance with a second color different from the first color. The outward layer is formed above the keycap body. The outward layer is formed with an engraving portion. The first color is exposed in the engraving portion. The present invention also provides a method of manufacturing a keycap of a keyboard key.

Systems and apparatus for controlling light emitted from light sources that backlight multicharacter keycaps, resulting in different characters being displayed on the keycaps. A system may include: a processor, and a keyboard having one or more backlit keyboard keys, where at least one of the one or more backlit keyboard keys includes: a socket comprising a light source, and a keycap coupled to the socket. The keycap may include: a first color filter corresponding to a first character, where the first character is displayed on the keycap when a color of light emitted from the light source matches the first color filter, and a second color filter corresponding to a second character, where the second character is displayed on the keycap when the color of the light emitted from the light source matches the second color filter.