Type of table lamp
Touch
The principle of the touch desk lamp is to install an electronic touch IC inside and form a control circuit with the electrode at the touch of the desk lamp.
When the human body touches the sensing electrode, the touch signal is transmitted to the touch sensing end by the pulse signal generated by the pulsed DC current, and then the touch sensing end will send a trigger pulse signal to control the light on; Touch again, and the touch signal will be transmitted to the touch sensing end by a pulse signal generated by the pulsed DC power. At this time, the touch sensing end will stop sending the trigger pulse signal. When the AC power is zero, the light will go out naturally.
However, sometimes when the power is off or the voltage is unstable, it will light up automatically. It can also be controlled if you touch the paper or cloth with excellent signal sensitivity
Brightness adjustable
The working principle of the adjustable table lamp is that the resistance and capacitance phase-shifting circuit is composed of resistance R2, potentiometer RP1 and capacitor C. Adjusting RP1 can change the conduction angle of the bidirectional thyristor V, thus changing the brightness of the bulb EL. The resistance R1 is the current limiting resistance. The charging speed of C is also related to the parallel circuit.
When R1 and RP2 are fixed, the shunt size is determined by the resistance of photosensitive resistor RL. When the grid voltage rises, the light brightness increases, the RL resistance decreases, the shunt increases, the voltage at both ends of capacitor C increases slowly, the thyristor V conduction angle decreases, the output voltage decreases, and the light brightness decreases; On the contrary, when the grid voltage decreases, the RL resistance increases, the shunt decreases, the thyristor conduction angle increases, the output voltage increases, and the light brightness increases. The light brightness is automatically stabilized at the set value.
Remote control
The analog dimming table lamp and the analog variable control center have the functions of remote control on and off, various lights can be adjusted at will, and the lights can be automatically memorized and stored.
The above functions are realized by using a key on the remote control. Press and release the key set on the remote control to turn it on or off, and press and hold the key to turn it on and off, which is a continuous cycle from the off state to the brightest state, from the brightest state to the off state. When you need some light, just release the handle, and when you turn off the light, the light state at that time will be automatically saved, When the light is turned on next time, the brightness state of automatic memory will appear, thus saving electricity and protecting eyes.
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