An illuminated keyswitch structure includes a base plate, a drive circuit board under the base plate, a spacer between the drive circuit board and the base plate, and a light-emitting part on the circuit board. The spacer has a through hole communicating with an opening of the base plate in a vertical direction. The sidewall of the through hole is opaque. The light-emitting part is located in the through hole, and falls within a projection of the opening in the vertical direction. The light-emitting part has a top surface that is lower than or equal to a bottom surface of the base plate in the vertical direction. The structure of the illuminated keyswitch structure around the light-emitting part can keep flat by the spacer. The spacer can prevent the light-emitting part from structurally entering the opening, avoiding structural interference between the light-emitting part and other components above the base plate.

A backlight module is configured to illuminate at least one keycap. The backlight module includes a shielding sheet, a lighting board and a protrusion structure. The lighting board includes an illuminant unit and a pair of footprints respectively connecting the illuminant unit. Each of the footprints includes at least one hollow area, and the at least one hollow area overlaps at least a portion of the illuminant unit. The protrusion structure is formed at the shielding sheet. The protrusion structure protrudes towards the light board and at least partially overlaps the pair of footprints, so that the backlight module diffuses light of the illuminant between the protrusion structure and the footprints.

A backlight module of an illuminated keyboard device includes a circuit board and a plurality of light-emitting elements. The circuit board has a top surface and a bottom surface opposite to the top surface. The top surface has a plurality of key assembling regions. Each of the key assembling regions has a stress release hole defined through the top surface and the bottom surface. The light-emitting elements are respectively disposed on the key assembling regions. Each of the light-emitting elements includes a main body and a conductive portion connected to the main body. The conductive portion is electrically connected to the circuit board, and the stress release hole is adjacent to the conductive portion of each of the light-emitting elements.

A lighting keyboard includes a backlight module and a keyswitch. The backlight module includes two lighting units, a light guide panel, a lighting board and a micro-structure layer. The light guide panel includes two panel holes to accommodate the two lighting units. The light guide panel further includes at least one slot located between the two lighting units. The lighting board is disposed in parallel to the light guide panel, and the lighting board includes at least one pair of non-parallel main traces in electrical connection with the two lighting units. The micro-structure layer is disposed in parallel to the light guide panel, and the micro-structure layer includes at least one micro-structure region. The at least one micro-structure region is disposed between the two lighting units, and meanwhile the at least one slot of the light guide panel is at least partially located within the at least one micro-structure region.

A compact switch mechanism operating a contactor array and having a lighted display.

An illuminated keyswitch structure includes a base plate, a drive circuit board under the base plate, a spacer between the drive circuit board and the base plate, and a light-emitting part on the circuit board. The spacer has a through hole communicating with an opening of the base plate in a vertical direction. The sidewall of the through hole is opaque. The light-emitting part is located in the through hole, and falls within a projection of the opening in the vertical direction. The light-emitting part has a top surface that is lower than or equal to a bottom surface of the base plate in the vertical direction. The structure of the illuminated keyswitch structure around the light-emitting part can keep flat by the spacer. The spacer can prevent the light-emitting part from structurally entering the opening, avoiding structural interference between the light-emitting part and other components above the base plate.

A compact switch mechanism operating a contactor array and having a lighted display.

An illuminated keyboard includes a light-emitting diode light string, a controller, a feedback line and a plurality of keys. The light-emitting diode light string includes a plurality of light-emitting diode modules which are connected in series through a serial connection wire. Each light-emitting diode module includes a light-emitting diode chip and a drive circuit. The controller is electrically connected with the light-emitting diode light string. The feedback line is electrically connected between the light-emitting diode modules and the controller. The keys correspond to the light-emitting diode modules and are electrically connected with the feedback line. Each light-emitting diode module emits light according to a received light-emitting signal and outputs a feedback signal. When at least one of the keys is switched to a pressing state, the feedback signal is pulled from a first level to a second level for the controller to differentiate the key in the pressing state.

A multi-functional control device includes a casing unit, and press button modules disposed on a main circuit board in the casing unit. Each press button module includes a sub-circuit board connected to the main circuit board, a micro-contact switch mounted on the sub-circuit board, an auxiliary case removably mounted on the micro-contact switch, a driving circuit board removably disposed in the auxiliary case to connect the sub-circuit board, a display module removably disposed on the auxiliary case. A transparent cap covers the display module and the auxiliary case, and is detachably connected to the auxiliary case.

A multi-functional control device includes a casing unit, and press button modules disposed on a main circuit board in the casing unit. Each press button module includes a sub-circuit board connected to the main circuit board, a micro-contact switch mounted on the sub-circuit board, an auxiliary case removably mounted on the micro-contact switch, a driving circuit board removably disposed in the auxiliary case to connect the sub-circuit board, a display module removably disposed on the auxiliary case. A transparent cap covers the display module and the auxiliary case, and is detachably connected to the auxiliary case.