Abstract: A keyswitch structure includes a base, an upper casing, and a keycap. The base includes a lower casing and an elastic dome with a hole disposed above the lower casing. The upper casing is fixedly disposed above the base and has an opening. The keycap is detachably connected to the upper casing and has a keycap body and an impact post. The keycap body slidably passes through the opening. The impact post protrudes from the keycap body toward the base and extends into the hole. When the keycap is pressed toward to the upper casing, the key cap squeezes the elastic dome, and the impact post impacts the base to generate a sound. A keyboard includes a plurality of the keyswitch structures. The upper covers of the key structures are formed as a single component, and the lower covers of the key structures are formed as a single component.

Abstract: A backlight module includes a lighting board, a light guide panel, a shielding sheet, and a protrusion structure. The lighting board includes two non-intersected traces, a plurality of microstructure regions and at least one illuminant unit. The illuminant unit is connected between the microstructure regions. The microstructure regions do not overlap with the two non-intersected traces. The light guide panel is disposed above the lighting board, and the shielding sheet is disposed above the light guide panel. The protrusion structure is formed on the shielding sheet, protrudes towards the lighting board, and is between the microstructure regions. The protrusion structure diffuses light of the illuminant unit at an early section of its light path to enter into the light guide panel for lateral transmission. The plural microstructure regions reflect and recycle the light at a following section of the light path to jointly enhance the uniformity of illuminating a keycap.

Abstract: A power conversion system (PCS) is provided. A micro-control unit of the PCS obtains a current charged ratio of a rechargeable battery according to a state-of-charge (SOC) signal received from the rechargeable battery, and obtains an output power of the PCS according to the voltage and current detected by a voltmeter-and-current meter of the PCS. When the micro-control unit detects that the mains off-grid occurs, the following steps are performed: judging whether a current charged ratio of the rechargeable battery is greater than the first ratio; when it is determined that the current charged ratio is greater than the first ratio, judging whether the output power is less than a first power; and when it is judged that the output power is less than the first power, increasing a frequency of an alternating current output from an alternating current (AC) power port of the PCS, so that a photovoltaic (PV) inverter coupled to the AC power port stops outputting power.

Abstract: A backlight module for a lighting keyboard comprises a lighting board including light emitting units, a light guide panel disposed on the lighting board and including light guide holes, and a shielding sheet disposed on the light guide panel. Each light emitting unit is located in each light guide hole. The backlight module is divided into regions including a middle region and two first side regions located outside the middle region. The light guide holes include at least one middle light guide hole in the middle region and at least one first light guide hole in the first side region. A distance between a light emitting unit located in the middle light guide hole and a wall of the middle light guide hole is lesser than a distance between a light emitting unit located in the first light guide hole and a wall of the first light guide hole.

Abstract: A keycap lifting mechanism includes a first support and a second support. Each of the first support and the second support includes a long arm and a plurality of support arms protruding from the long arm. The first support and the second support are pivotally connected with each other around a pivot axis through the support arms of the first support and the second support that are staggered along the pivot axis, and jointly form two support structures and an intermediate support structure between them. Two of the support arms on two opposite sides of the intermediate support structure are not pivotally connected to the adjacent support arms outside the intermediate support structure. A long rectangular keyswitch structure includes a base plate, a keycap, and the above keycap lifting mechanism. In a keycap lifting mechanism, its keycap vertically covers part of an electrical connection structure of its switch circuit board.

Abstract: A keyswitch is provided. The keyswitch comprises a keycap. The keycap has a key top and a key skirt. The key skirt surrounds the key top and extends downward and outward. The key skirt includes a plurality of skirt corners and a plurality of skirt sides. The skirt corners and the skirt sides allow light to pass through. The key skirt has an annular skirt undersurface formed by a plurality of side undersurfaces and a plurality of corner undersurfaces. A ratio of a width of the corner undersurface to a width of the side undersurface is between 1 and 3.

Abstract: A backlight module is configured to illuminate at least one key cap. The backlight module includes a light emitting unit, a light guide plate and a lighting board. The light guide plate has a light guide hole for accommodating the light emitting unit. The lighting board has a pair of pads connected to the light emitting unit respectively. The lighting board includes a first reflective layer surrounding the light emitting unit and at least partially overlapping with the pair of pads. One of the pair of pads has a first branch and a first hollow area behind the first branch, the other one of the pair of pads has a second branch and a second hollow area behind the second branch, and the light emitting unit is disposed between the first hollow area and the second hollow area.

Abstract: A backlight module for a lighting keyboard having a specific function key comprises a lighting board, a light guide panel and a shielding sheet. The shielding sheet, the light guide panel and the lighting board are stacked from top to bottom. The lighting board has first and second light emitting units. The light guide panel has first and second light guide holes. The first light emitting unit is in the first light guide hole. The second light emitting unit is in the second light guide hole. The shielding sheet has a blocking portion. The blocking portion overlaps in projection with the first light emitting unit and the second light emitting unit. The light guide panel has a light guide panel slot. The light guide panel slot overlaps in projection with the blocking portion and a boundary of a keycap projection area of the specific function key.

Abstract: A keycap lifting mechanism includes first and second supports pivotally connected around a pivot axis through their staggered support arms. The structural design of the first and second supports enhances the stability of the keycap lifting mechanism in supporting a keycap. For example, a long arm of the first support has a protruding block extending into a corresponding notch formed on an end of the support arm of the second support. A minimum width of the long arm of the first support is 0.4 to 0.67 times a distance from an outer edge of the long arm to the pivot axis. A ratio value of the minimum width to the distance is 0.8 to 1.2 times a ratio value of a minimum width of a long arm of the second support to a distance from an outer edge of the long arm of the second support to the pivot axis.

Abstract: A backlight module applicable to a key module is provided, the key module includes a plurality of key units and a baseplate, and the plurality of key units are disposed on the baseplate. The backlight module includes a lower substrate, a plurality of periphery light sources disposed along the peripheral of the baseplate, and a shielding structure. The lower substrate is disposed below the baseplate, and there is an outer edge gap between an outer edge of the baseplate and the lower substrate. The periphery light sources are disposed between the baseplate and the lower substrate. The shielding structure is disposed outside those periphery light sources distributed, to prevent light provided by the plurality of light sources from being emitted out of the outer edge gap.

Abstract: An illuminated keyswitch structure and an illuminating module thereof are provided. The illuminating module includes a drive circuit board having a reflector layer disposed thereon, a light-emitting part disposed on the drive circuit board and proximate to the reflector layer, a covering structure having an island-shaped covering portion, and a spacer adhered between the covering structure and the drive circuit board and having a through hole and an adhesive-less clearance fringe at least partially surrounding the through hole, wherein the island-shaped covering portion covers above the light-emitting part and the through hole.

Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.

Abstract: A lighting keyboard comprises a first key and a second key, with a gap region between them. A backlight module for the lighting keyboard comprises a lighting board having a light emitting unit, a light guide panel, and a shielding sheet having a light-reducing pattern corresponding to the first key, which are stacked from top to bottom. The backlight module has a colored material layer on the shielding sheet or the light guide panel and vertically overlapping with the gap region. A light of the light emitting unit is guided by the light guide panel to pass through the light-reducing pattern and form a first color light upward from an inner outlet of the first key, and further to pass through the colored material layer and form a second color light different from the first color light upward from an inner outlet and a boundary of the second key.

Abstract: A method of fabricating an inductor device includes preparing a conductive coil, connecting two terminals to one of two ends of the conductive coil, molding a pillar from a plurality of first composite material powders by a pressing process where each first composite material powder is composed of a first magnetic material powder coated with a first thermosetting resin, placing the pillar in a surrounding space formed by the conductive coil, molding a cladding body from a plurality of second composite powders where the second composite material powders is composed of a second magnetic material powder coated with a second thermosetting resin, heating the cladding body, the conductive coil and the pillar cladded by the cladding body such that the plurality of first magnetic material powders are bonded by the cured first thermosetting resin and the plurality of second magnetic material powders are bonded by the cured second thermosetting resin.

Abstract: A charging system includes a first device; a second device; and a power adjustment device including a DC-to-DC conversion unit; and a micro-control unit for receiving a charging instruction, a first power information of the first device and a second power information of the second device and performing the following steps: controlling the DC-to-DC conversion unit to convert a first supply current received by the first device into a first charging current according to the first power information and the second power information when the charging instruction instructs the first device to charge the second device; and controlling the DC-to-DC conversion unit to convert a second supply current received by the second device into a second charging current according to the first power information and the second power information when the charging instruction instructs the second device to charge the first device.

Abstract: A keyswitch structure includes a baseplate, a keycap disposed over the baseplate and configured to be movable relative to the baseplate, a membrane switch disposed between the keycap and the baseplate and configured to have one or more buffer portions with two open edges opposite to each other, and a first linking bar connected to the keycap and disposed between the keycap and the membrane switch. The first linking bar has a first long side and a first short side connected to each other. When the keycap moves relative to the baseplate, the one or more buffer portions provide buffer to the first short side and/or an end section of the first long side.

Abstract: A keyswitch includes a board, a cap located above the board, a membrane circuit board disposed on the board to make first and second engaging structures of the board protrude from first and second holes of the membrane circuit board respectively, and a lifting device. The lifting device is connected to the cap and the board and includes first and second support members. The first support member is movably connected to the cap and has a pivot end portion. The pivot end portion is movably connected to the first and second engaging structures and has a first abutting portion extending toward edges of the first and second holes along a pivot axis of the first engaging structure. The first abutting portion abuts on the membrane circuit board. The second support member rotatably intersects with the first support member and is movably connected to the cap and the board.

Abstract: An illuminated touch key uses a chamfer structure of a light guide panel disposed on a sensing module or a light guide panel adjacent to a sensing module to guide light emitted by a light source to a hollow area of a keycap to emit light, thereby forming an illuminated pattern corresponding to the hollow area. Accordingly, a user can accurately find the location of the illuminated touch key according to the illuminated pattern. Since there is no need to add a light guide structure above the sensing module, the height of the illuminated touch key will not be increased, such that it is conducive to make the illuminated touch key thinner.

Abstract: A keyswitch includes a keycap, a lifting mechanism and a bottom board. The lifting mechanism is movably connected under the keycap and has a connection shaft. The bottom board has a hole structure and is located under the lifting mechanism. A hook structure is bent from a side wall of the hole structure toward the connection shaft. The connection shaft is movably connected to the hook structure to make the keycap movable upward and downward relative to the bottom board via the lifting mechanism. A first reinforcement area extends in a tapered manner outward from a bent side of the hook structure along the side wall.

Abstract: A keyswitch structure includes a casing, a first support, a second support, and a pressing stem. The casing forms an accommodating space and an opening communicating with the accommodating space. The first and second supports are disposed in the accommodating space and are directly and rotatably connected with the casing; the supports are also pivotally connected with each other. The pressing stem extends into the accommodating space to be rotatably connected with the first and second supports and protrudes from the casing through the opening. The pressing stem is movable parallel to a vertical direction relative to the casing through the first and second supports. A motion of the pressing stem in the vertical direction has a top dead center and a bottom dead center. When the pressing stem is at the top dead center and the bottom dead center, it does not touch the casing in the vertical direction.