Abstract: Disclosed are an LED dimming circuit, a dimming device and a dimming method. The LED dimming circuit comprises a reference voltage source, a line voltage compensation module, a dimming module, and a constant current source module. The line voltage compensation module outputs a compensation information to the reference voltage source according to a current line voltage, the reference voltage source modulates a reference voltage according to the compensation information, and then outputs a voltage reference having the compensation information to the dimming module, the dimming module outputs, according to the voltage reference having the compensation information and an externally input dimming signal, a dimming voltage to the constant current source module, the constant current source module controls a working current of an LED lamp string according to the dimming voltage.

Abstract: The present invention embodiment provides a terminal cover body and a terminal, said terminal cover body being used for covering the device body of the terminal and encapsulating electronic components on the device body. The terminal cover body comprises: a casing body, wherein a slide-groove is provided in the casing body and a slide-block is provided in the slide groove; a lock engagement component which comes into contact with the slide-block; pushing the slide-block causes the lock engagement component to move between a first state and a second state, wherein, in the first state the lock engagement component is engaged with the device body and the casing body is tightly connected to the device body; in the second state, the lock engagement component is detached from the device body and the casing body can be separated from the device body.

Abstract: The present invention embodiment provides a terminal cover body and a terminal, said terminal cover body being used for covering the device body of the terminal and encapsulating electronic components on the device body. The terminal cover body comprises: a casing body, wherein a slide-groove is provided in the casing body and a slide-block is provided in the slide groove; a lock engagement component which comes into contact with the slide-block; pushing the slide-block causes the lock engagement component to move between a first state and a second state, wherein, in the first state the lock engagement component is engaged with the device body and the casing body is tightly connected to the device body; in the second state, the lock engagement component is detached from the device body and the casing body can be separated from the device body.