Abstract: Provided is a display device (100). The display device (100) includes a display panel (10), a driving chip (20), a first signal transmission line (12), and a compensation line (14). In a display stage, a first terminal (a) of the driving chip (20) outputs an initial power reference voltage (ELVSS) and transmits it to a cathode (B) of a light-emitting device (D) through the first signal transmission line (12), a second terminal (b) outputs an initial anode reset voltage (V0) to an anode (A) of the light-emitting device (D), and the compensation line (14) transmits an anode reset voltage (VI) that changes synchronously with the initial power reference voltage (ELVSS) to any position of the first signal transmission line (12).

Abstract: A laser diode control method and control system, and a laser device. The control method comprises: using a first driving voltage and a first duty cycle to drive a laser diode to start working; acquiring the working time of the laser diode; and when the working time of the laser diode exceeds a first time threshold, using a second driving voltage and a second duty cycle to drive the laser diode to work, wherein the second driving voltage is lower than the first driving voltage, and/or the second duty cycle is smaller than the first duty cycle, such that the power consumption in the working process of the laser diode can be effectively reduced, and an excessive high temperature of the laser diode during normal operation can be prevented.

Abstract: A laser diode control method and control system, and a laser device. The control method comprises: using a first driving voltage and a first duty cycle to drive a laser diode to start working; acquiring the working time of the laser diode; and when the working time of the laser diode exceeds a first time threshold, using a second driving voltage and a second duty cycle to drive the laser diode to work, wherein the second driving voltage is lower than the first driving voltage, and/or the second duty cycle is smaller than the first duty cycle, such that the power consumption in the working process of the laser diode can be effectively reduced, and an excessive high temperature of the laser diode during normal operation can be prevented.

Abstract: Provided is a conversion circuit, including a switch signal input terminal; first and second input terminals; and first and second output terminals. The switch signal input terminal receives a switch control signal. The first and second input terminals receive first and second input signals, and polarities of first and second input signals are different and alternately switch. Depending on the switch control signal, the first input terminal is in communication with the first output terminal and the second input terminal is in communication with the second output terminal, or the second input terminal is in communication with the first output terminal and the first input terminal is in communication with the second output terminal, so that a first output signal outputted from first output terminal has a consistent polarity at any time and a second output signal outputted from the second output terminal has a consistent polarity at any time.

Abstract: A laser control circuit, comprising at least two laser tubes and a control unit controlling the at least two laser tubes respectively; the control unit sends control signals to the at least two laser tubes to control startup/shutdown thereof. The control unit comprises: a main pulse signal generator and a logic control unit; the main pulse signal generator, the logic control unit and the at least two laser tubes are connected successively; and the logic control unit classifies the control signals into different types of control signals and sends to the at least two laser tubes, causing the at least two laser tubes to present different working conditions. The laser control circuit has more flexible control over the laser tubes, reduces working current of the laser tubes and allows the working current to be steadier, thus avoiding peak interference.

Abstract: A multi-function power tool includes a motor, a control circuit, a variable speed gear box, a transmission unit, a bow member, and a module. The control circuit is connected to an input end of the motor. A rotating end of the motor is connected to an input end of the variable speed gear box. An output end of the variable speed gear box is connected to the transmission unit. One end of the bow member is mounted on the transmission unit. The module is sandwiched between another end of the bow member and the transmission unit. The transmission unit is a ball screw structure. The power tool has a simple structure and a low cost. The ball screw structure can greatly improve mechanical efficiency and save energy consumption. The module for machining a workpiece may be changed to realize punching, shearing, and pressure jointing functions accordingly.