Abstract: A key structure includes a keycap, a base plate and a supporting element. The supporting element includes a first frame and a second frame. The supporting element is connected with the keycap and the base plate. Consequently, the keycap is movable upwardly or downwardly relative to the base plate. When the first frame and a second frame are combined together, a first span and a second span are formed sequentially. The second span is smaller than the first frame.

Abstract: A wireless input system includes a first computer, a second computer, a first-mode wireless connection device, a first input device and a second input device. When the first-mode wireless connection between the first input device and the first-mode wireless connection device is established and the first-mode wireless connection between the second input device and the first-mode wireless connection device is established, the first input device and the second input device can be operated to control the first computer. When the second-mode wireless connection between the first input device and the second computer is established, the second input device can follow the first input device to perform a connection switching operation. Consequently, the second-mode wireless connection between the second input device and the second computer is established.

Abstract: A smart door lock device is installed on a door panel. The smart door lock device includes a base, a handle and a projection module. The base is combined with the door panel. The handle is installed on the base. The projection module is installed on the base. A safe door opening range image corresponding to a rotation range of the door panel can be projected on a ground by the projection module.

Abstract: A dome switch button is installed on a circuit board. The dome switch button includes an elastic piece, a conductive piece and a buffering element. The elastic piece is located over the conductive piece. The buffering element is located under the conductive piece and electrically connected with the circuit board. When the elastic piece is subjected to elastic deformation to trigger the conductive piece, an electric signal is generated. The buffering element is electrically connected with the circuit board. Moreover, a first electric pad and a second electric pad of the circuit board are covered by the buffering element. The electricity from the first electric pad and the second electric pad of the circuit board can be transferred to the conductive piece through the buffering element. Consequently, the conductive piece can be electrically connected with the circuit board without the need of using additional conductor lines.

Abstract: A size determination method for a document processing device is provided. The document processing device includes an automatic document feeding module. The automatic document feeding module includes a support tray, an entrance and a detecting module. The detecting module includes a front-row detector and plural rear-row detectors. The size determination method includes following steps. Firstly, a document with plural originals is placed on the support tray and inserted into the entrance. Then, a selected original of the document is transported. When the selected original is detected by the front-row detector, the plural rear-row detectors are powered on. The selected original is continuously transported, and the plural rear-row detectors are operated in a detection mode. Then, a size of the selected original is determined according to detection results of the plural rear-row detectors and a transfer time of the selected original.

Abstract: A USB interface detection module includes a detection unit and an adapting device. The adapting device is electrically connected between a first electronic device and a second electronic device. According to the interface specification of the first electronic device, the voltage value of a configuration channel pin is changeable through the use of the GND_DRAIN pin and the switching action of a field-effect transistor switch. Consequently, the interface specification of the first electronic device is acquired by the second electronic device.

Abstract: A doorbell system includes a power supply circuit, a smart module, a chime, a chime switch and a control module. The smart module provides a smart function. The chime switch is electrically connected between the control module, the smart module, and the power supply circuit. When the chime switch is turned on, the current flows through the chime under control of the control module. When the chime switch is turned off, the current cannot flow through the chime under control of the control module; consequently, the buzzing sound cannot be generated.

Abstract: A method for aligning a camera lens with a light source is provided. The method is used in an aligning system. The aligning system includes an alignment element, a reference camera and a fixture. Firstly, the reference camera shoots a reference chart on the alignment element. Then, the light source is placed on the fixture. The light source illuminates the alignment element to generate an illumination result. The reference camera shoots the illumination result. If the illumination result does not comply with a preset specification represented by the reference chart, the fixture adjusts the light source. Then, the camera lens is placed on the fixture. Then, the camera lens shoots the reference chart on the alignment element to acquire a shooting result. If the shooting result does not comply with the preset specification, the fixture adjusts the camera lens.

Abstract: A keyboard device includes a casing, a circuit board, plural keys and an electrostatic conduction module. The circuit board is disposed within the casing. The circuit board includes a ground terminal. The plural keys installed in the corresponding key slots of the casing. The electrostatic conduction module includes a first conductive element, an elastic conductive element and a second conductive element. The first conductive element is installed on a keycap of the key. The elastic conductive element is disposed within the casing and contacted with the circuit board. The second conductive element is connected between the first conductive element and the elastic conductive element. Moreover, electrostatic charges on the keycap are transferred to the circuit board through the first conductive element, the second conductive element and the elastic conductive element and discharged from the ground terminal of the circuit board.

Abstract: A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.

Abstract: A function parameter switching memory circuit for a peripheral device is provided. The peripheral device includes a function parameter switching memory circuit, a power management device and an optical sensor. The function parameter switching memory circuit includes a function parameter switching key and a simulation control circuit. The function parameter switching key generates and outputs a physical switch signal in response to a switching trigger action of a user. The simulation control circuit generates a virtual switch signal to the optical sensor. The simulation control circuit analyzes the physical switch signal to memorize a switched-and-set function parameter storage value. The simulation control circuit generates the virtual switch signal according to one of the physical switch signal and the switched-and-set function parameter storage value. The optical sensor performs a function parameter switching process according to the virtual switch signal.

Abstract: A keyboard device includes a keyboard module and a palm rest module. The palm rest module is arranged beside a lateral side of the keyboard module, and supports a wrist of a user. The palm rest module includes a pedestal, a casing and an adjusting element. The casing is disposed on the pedestal. The adjusting element is arranged between the pedestal and the casing. A position of the casing relative to the pedestal is adjustable through the adjusting element. In a first usage state, the casing is moved toward the keyboard module or moved away from the keyboard module through the adjusting element. In a second usage state, the casing is rotated about the adjusting element and relative to the keyboard module, so that an included angle is formed between the casing and the lateral side of the keyboard module.

Abstract: A key structure includes a base plate, a supporting element, a resilience arm and a keycap. The keycap includes a bulge. The supporting element is installed on the base plate. The resilience arm is connected with the supporting element and aligned with the bulge of the keycap. The keycap is connected with the supporting element. When the keycap is moved toward the base plate, the bulge is moved downwardly to push the resilience arm. After the resilience arm is pushed by the bulge, the resilience arm is subjected to elastic deformation and separated from the bulge. After the resilience arm is separated from the bulge, the resilience arm knocks on the keycap, so that a sound is generated.

Abstract: A key structure includes a protective cover and a keycap. The keycap includes flow-guiding bevel surface. When the protective cover and the keycap are adhered on each other through a glue material, an excess portion of the glue material is retained on the flow-guiding bevel surface. Consequently, the excess portion of the glue material will not spread to other regions.

Abstract: A wireless input device includes an information receiving terminal and an information outputting terminal. The information receiving terminal generates a first-portion key. The information outputting terminal receives the first-portion key and generating a second-portion key. An original information is converted into an encrypted information by the information outputting terminal according to the first-portion key, the second-portion key and an encryption algorithm. The encrypted information and the second-portion key are transmitted from the information outputting terminal to the information receiving terminal. The encrypted information is restored to the original information by the information receiving terminal according to the first-portion key, the second-portion key and an encryption algorithm.

Abstract: A light emitting structure includes a light guide ring and a plurality of light emitting elements. The light guide ring has a plurality of light guide portions connected in sequence, and each of the light guide portions includes a light source receiving end and a connecting portion opposite to each other, in which one of the light guide portions is connected to another of the light guide portions, and an inner side or an outer side of the one of the light guide portions is connected to the connecting portion of the other of the light guide portions. The light emitting elements are laterally adjacent to the light source receiving ends of the light guide portions, respectively.

Abstract: A calibration device includes a main control unit, an interface conversion unit and an electronic load generation unit. The electronic load generation unit provides an electronic load, so that a USB control chip generates a constant load current. The USB control chip uses at least one preset conversion parameter to generate an analog-to-digital conversion value according to the constant load current. The main control unit generates a to-be-calibrated output current according to the analog-to-digital conversion value. The main control unit generates at least one calibrated conversion parameter according to the constant load current and the to-be-calibrated output current. The USB control chip uses the at least one calibrated conversion parameter to generate a calibrated analog-to-digital conversion value, so that an over current protection mechanism is accurately enabled.

Abstract: The product detection system includes a computing device, at least one power detection instrument and a product detection device. The product detection device includes a processing unit, plural USB-C transmission ports and plural detection connection ports. A product detection method includes following steps. Firstly, at least one USB-C under-test product is connected with the plural USB-C transmission ports, and the at least one power detection instrument is connected with the plural detection connection ports. Then, the USB-C transmission port is set as a first role or a second role. Then, the USB-C transmission port corresponding to the first role is cyclically operated at plural designated voltages under control of the processing unit, and the processing unit issues an output voltage to the USB-C transmission port corresponding to the second role. Then, an operation status of the USB-C under-test product is detected.

Abstract: A key structure includes a switch circuit layer, a pedestal and a keycap. The pedestal includes a protrusion part and a hollow part. The keycap includes a buffering hook and a locking hook. The pedestal is disposed on the switch circuit layer. The keycap is disposed within the hollow part of the pedestal. The buffering hook and the locking hook of the keycap are aligned with the protrusion part of the pedestal. While the keycap is moved in a direction away from the switch circuit layer, the buffering hook is contacted with the protrusion part and then the locking hook is contacted with the protrusion part.

Abstract: An image display device a light source, an image display layer and a refractive structure layer. The light source emits a light beam. The image display layer is located over the light source. The image display layer includes plural pattern sections. The refractive structure layer has a reference plane. When the light beam is irradiated on the refractive structure layer and there is a first angle between the light beam and the reference plane, the light beam is guided to a first pattern section, so that a first image is displayed on the image display layer. When the light beam is irradiated on the refractive structure layer and there is a second angle between the light beam and the reference plane, the light beam is guided to a second pattern section, so that a second image is displayed on the image display layer.