Abstract: The present invention relates to a cholesteric liquid crystal display device, and a control method. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display module, a solar battery unit, and a control unit. The control unit further includes an ambient energy management module and an energy storage module. The solar battery unit provides electrical energy to the management module. And the ambient energy management module stores electrical energy in the energy storage module. When it is necessary to refresh the images of the cholesteric liquid crystal display module, and the potential difference of the energy storage module reaches the charging cut-off voltage. The energy storage module can discharge the stored electrical energy to provide the electrical energy required by the cholesteric liquid crystal display module to refresh the image.

Abstract: A self-powered cholesteric liquid crystal display (ChLCD) device and a method for tracking maximum power are disclosed. The ChLCD device includes a solar cell module, electrical energy for charging, an energy storage device, a charging unit, and a ChLCD module. The method of tracking the maximum power is: supply electrical energy for charging to the charging unit, sense the ambient temperature, and capture the sensed ambient temperature, correspond its value to the voltage value in the comparison data, and adjust the reference driving voltage with a resistor divider, and then electrically charging to the charging unit by the reference driving voltage, so that the charging unit can capture the maximum power of the electrical energy from the solar cell module, and then store the electrical energy in the energy storage device, to refresh the display screen of the ChLCD module and the ChLCD device can effectively utilize electricity.

Abstract: A quick release hotend is disclosed. The hotend includes a base having an input portion and an engaging recess, an engaging member having a first engaging portion and a second engaging portion, and a body having a protruding ring and a feeding inlet. The base has a through-hole penetrating the input portion and communicating with the engaging recess, and the base has a chamber in which an elastic element is disposed. The first engaging portion is separably coupled to the base and abut against the elastic element. The protruding ring is engaged with the engaging recess to communicate the feeding inlet with the through-hole. The body has a concave portion to which the second engaging portion is separably coupled. The body has a nozzle to which the raw material imported from the feeding inlet is guided.

Abstract: A quick release hotend is disclosed. The hotend includes a base having an input portion and an engaging recess, an engaging member having a first engaging portion and a second engaging portion, and a body having a protruding ring and a feeding inlet. The base has a through-hole penetrating the input portion and communicating with the engaging recess, and the base has a chamber in which an elastic element is disposed. The first engaging portion is separably coupled to the base and abut against the elastic element. The protruding ring is engaged with the engaging recess to communicate the feeding inlet with the through-hole. The body has a concave portion to which the second engaging portion is separably coupled. The body has a nozzle to which the raw material imported from the feeding inlet is guided.

Abstract: A 3D printer and a dual nozzle guiding module thereof are disclosed. The dual nozzle guiding module includes a guiding rail, a guiding block slidably coupled to the guiding rail and having a positioning part, and two nozzles slidably coupled to the guiding rail and located on both sides of the guiding block respectively. Each of the two nozzles is separably connected to the positioning part of the guiding block through an adsorption part. The 3D printer includes a bracket, a printing platform coupled to a lifting module of the bracket, and a sliding frame coupled to the bracket and located above the printing platform. The sliding frame has at least one slide rail. The dual nozzle guiding module is slidably coupled to the at least one slide rail.

Abstract: An electric motorized scooter includes a base having a front wheel and a rear wheel on two ends thereof, and a steering tube is rotatably connected to the base and a handle is connected to a top end of the steering tube. Two side wheels are connected to two sides of the base and driven by two motors. An electric differential includes a motor controlling unit which is electrically connected to the two motors so as to respectively control the speeds of the two motors. A steering control device includes an operation device and a steering unit which is electrically connected to the motor controlling unit. When turning the scooter, the two side wheels moves at different speeds so that the scooter can be turned at small angle.