A keyboard key device includes a keycap and a substrate unit. The substrate unit includes a light-emitting component, a light guide plate, and a light transmission plate. The light guide plate has first and second end surfaces, and at least one light-condensing hole. The first end surface is formed with an uneven microstructure for diffuse reflection of light rays. The light transmission plate has first and second side surfaces, and an outer reflective layer coated on the second side surface. A portion of light rays emitted from the light-emitting component and into the light transmission plate pass through the outer reflective layer, and the remainder of the light rays are reflected by the outer reflective layer.

An illuminated keyswitch structure is provided. A base plate includes plural openings and plural rib portions separating the openings. A drive circuit board is disposed under the base plate. A spacer having a through hole is disposed underneath the base plate and above the drive circuit board. A light-emitting part with low illuminance is disposed on the drive circuit board and in the through hole, and the light-emitting part vertically corresponding to one of the openings of the base plate. A light-permeable covering structure includes a first covering layer and a second covering layer. The second covering layer vertically corresponds to the light-emitting part and said corresponding opening of the base plate. The second covering layer blocks at least partial light of the light-emitting part toward said corresponding opening to reduce illuminating intensity provided there through.

A control device is provided. A membrane switch of the control device is specially designed. A cured ink member is formed on a surface the upper film layer facing the lower film layer or a surface of the lower film layer facing the upper film layer by using a UV printing process. Due to the ink member, a specified gap or distance between the upper film layer and the lower film layer can be maintained when they are not contacted with each other or when the membrane switch is not triggered.

A computer keyboard is provide which includes key members providing upward and downward movement; substantially translucent elastomeric domes underlying the key members, and a seat underlies the elastomeric domes for supporting the elastomeric domes and key members. A substantially translucent circuit board is positioned under the seat for the creation and transmission of signals indicating depression of the key members. A planar luminescent light source is positioned under the circuit board. Preferably, the luminescent light source is a translucent light pipe connected to LEDs which provide light. Also preferably, the light pipe has a flat bottom surface which is covered by one or more reflective members and a reflective sheet. The reflective members may comprise paint applied to the bottom surface of the light pipe.

A keyboard having a total recycled and renewable content of equal to or greater than 35 wt. %, based on the total weight of the keyboard is described. The keyboard contains a key cap containing a mechanically recycled polycarbonate polymer or a chemically recycled cellulose based polymer, a pair of cross arms forming a scissor-shaped structure containing a polymeric composition containing 60 wt. % to 100 wt. % of a polyoxymethylene polymer, and 0 wt. % to 40 wt. % of a filler containing glass, and a back light module containing a renewably source polycarbonate polymer or a chemically recycled polyester polymer.

A wall-mounted keypad may include a light detector circuit located inside the keypad that is configured to measure an ambient light level in a space. The light detector circuit may receive ambient light through an aperture that is hidden from view by the keypad. The keypad may include a reflector for directing ambient light onto the light detector circuit. The keypad may include an enclosure that houses the light detector circuit. The enclosure may define a recess that exposes at least a portion of the light detector circuit. The enclosure may include a reflector that may focus ambient light received through the aperture onto the light detector circuit. The keypad may include a control circuit that may be configured to illuminate the indicia of respective buttons of the control device in response to actuations of the one or more buttons, in accordance with the measured ambient light level.

A system is provided for streaming media content in a vehicle. The system includes a personal media streaming appliance system configured to connect to a media delivery system and receive media content from the media delivery system at least via a cellular network. The personal media streaming appliance system operates to transmit a media signal representative to the received media content to a vehicle media playback system so that the vehicle media playback system operates to play the media content in the vehicle.

A keycap is provided, including a base element, a cap and a character element. The base element includes a board main portion. The cap has a top portion, and a skirt portion. The skirt portion surrounds the top portion. The character element, located between the board main portion and the top portion. An area of the top portion corresponding to the character element is a top area. The thickness of the top area is substantially greater than or equal to 0.01 cm and substantially less than or equal to 0.3 cm.

A key structure, including a keycap, a scissor component, an elastomer, an optical switch, a shading portion, and a circuit board, is provided. The scissor component is formed of a first and a second supporter. The circuit board has two first and two second limiting units. The keycap has two third and two fourth limiting units. The first supporter is rotatably or slidably connected to the first and the third limiting units. The second supporter is rotatably or slidably connected to the second and the fourth limiting units. The keycap is disposed on the circuit board through the scissor component. The elastomer is interposed between the circuit board and the keycap. The optical switch includes an emitter and a receiver. The shading portion is disposed on the first or the second supporter to block a light signal transmitted between the emitter and the receiver.

A keyboard includes a backlight module, a base plate, a membrane circuit disposed on the base plate, and a plurality of key structures disposed on the membrane circuit. The backlight module includes a light source, a reflective layer, a light guide layer, and a shielding layer. The light source is disposed corresponding to the light guide layer. The light guide layer is located between the shielding layer and the reflective layer. The light guide layer has a through-hole. The shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer. The base plate is disposed on the shielding layer. The base plate has a positioning portion disposed corresponding to the through-hole of the light guide layer, which protrudes toward the reflective layer or the membrane circuit.