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 backlight control system includes a keyboard device and a computing device. The keyboard device includes a fixed light sheet, at least one movable light sheet, a light guide module and a key module. The computing device includes a processing unit. The movable light sheet is detachably and electrically connected with the fixed circuit board. The fixed light sheet projects a first light beam to plural keys of the key module through the light guide module. In a special scenario mode, the processing unit drives the movable light sheet to project a second light beam to at least one special key of the key module.

A backlight module includes a cover plate, a light guide plate, a circuit board, a reflective layer, and a light source. The light guide plate is disposed under the cover plate and has a first hole corresponding to a light-shielding region of the cover plate. The circuit board is disposed under the light guide plate and includes a first substrate and a conductive layer having a through hole. The reflective layer is disposed between the light guide plate and the circuit board and has a second hole. The first substrate is in contact with the reflective layer. The conductive layer is disposed between the first substrate and the reflective layer having a recess recessed into the through hole. The light source is disposed on the circuit board, accommodated in the first hole and the second hole corresponding thereto, and in contact with the conductive layer.

A leakage current protection device with an illumination function, including a shell, a movement assembly in the shell, power input and output assemblies coupled to the movement assembly, and an illumination assembly disposed inside the shell, which includes: an illumination control board electrically coupled to the power input or output assembly; a sensing unit coupled to the illumination control board and configured to sense an ambient condition outside the shell to generate a sensing output signal; a light emitting unit coupled to the control board, and controlled by the control board to turn on or off in response to the sensing output signal; and a light guide unit, formed by an operating element partially protruding out of the shell and disposed adjacent the light emitting unit, configured to guide the illumination light emitted by the light emitting unit out of the shell. The device is convenient to use and compact.

Keyboards and other electronic input devices have a key or keys with glyphs that are invisible to an unaided human eye in a first condition, such as when an underlying display attached to the key is not emitting light. The glyphs are visible through the key or keys when the display emits light. A one-way visibility layer or structure obscures the visibility of the display when viewed from above, but when the display emits light, the light penetrates through the one-way visibility layer, such as by passing through an array of microperforations in the key, and is visible to an onlooker.

A wall-mountable load control device may include an illuminated rotary knob for providing a nightlight feature. The load control device may be configured to control an intensity of a lighting load. The load control device may include a yoke adapted to be mounted to an electrical wall box, an enclosure attached to the yoke, a faceplate attached to the yoke and having an opening, a mounting member attached to the yoke, and/or a potentiometer located within the enclosure and having a shaft extending through an opening in the yoke and the opening of the faceplate. The load control device may include a collar attached to the boss of the mounting member and surrounding the shaft of the potentiometer. The mounting member may be configured to conduct light from at least one light source housed within the enclosure to illuminate the faceplate.

A light-emitting keyboard includes a bracket, a keycap, a circuit layer, a composite light-emitting layer and a spacing layer. The bracket has an opening. The keycap is disposed on the bracket and connected to the bracket via a support assembly. The circuit layer is disposed between the keycap and the bracket. The composite light-emitting layer is disposed under the bracket, and includes a substrate, a circuit disposed on the substrate and a light source located under the keycap and electrically connected to the circuit, wherein light emitted from the light source is transmitted upwardly to the keycap. The spacing layer is disposed between the composite light-emitting layer and the bracket, wherein the spacing layer includes a hole corresponding to the opening of the bracket, and the light source is located in the hole of the spacing layer.

A keyboard includes a base plate and a backlight module. The base plate has a short axis direction and a long axis direction, and the base plate includes at least one long slit. The long slit is disposed on the base plate along the short axis direction. The backlight module is disposed on the base plate. The backlight module includes a shielding sheet, a light guide plate and a reflecting sheet. An upper surface of the shielding sheet faces toward the base plate. The light guide plate is disposed on a lower surface of the shielding sheet. The reflecting sheet is disposed below the light guide plate. The reflecting sheet includes a plurality of first slits. When the length of the base plate is adjusted along the long axis direction, the reflective sheet is adjusted and moved along with the base plate by expansion of the first slits.

A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short axis direction and a long axis direction. The keys are disposed on the base plate. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of light guide structures corresponding to the keys respectively. Each of the light guide structures includes a ring portion and at least one bend line portion. The bend line portion connects to the ring portion, and the ring portion is formed by a plurality of bending portions. The reflecting sheet is disposed below the light guide plate.

A keyboard includes a base plate, a plurality of keys and a backlight module. The base plate has a short axis direction and a long axis direction. The keys are disposed on the base plate along the long axis direction, and the keys are arranged to form a plurality of rows. The backlight module is disposed on the base plate and includes a shielding sheet, a light guide plate and a reflecting sheet. The light guide plate is disposed on a lower surface of the shielding sheet. The light guide plate includes a plurality of long openings, and each of the long openings has at least one long side. The long side is parallel to the long axis direction, and each of the long openings has a central axis. The central axis is located between two adjacent rows on which the keys are disposed.