Experiment name:

High voltage and wireless drive of LEDs in capacitors inspired by friction nano generators

research direction: AC LED driver, friction nano generator

Experiment content:

The tribo nanogenerator (TENG) can drive hundreds of LEDs at the same time. The mechanism is to generate a fixed amount of carriers to periodically recombine light. Inspired by TENG, we propose a kind of LED device in a capacitor, which uses signal The generator is tested by the signal provided by the power amplifier and compared with the output of the tribo nanogenerator. Finally, a high-voltage and wireless drive of the LED in the capacitor is proposed.

Testing purposes:

In order to explain the working mechanism of TENG driving LED in detail, and propose an LED structure in a capacitor to promote the development of TENG and AC LE

Test Equipment:

"LED in Capacitor" device, signal generator, power amplifier, electrometer, oscilloscope, photodiode

experiment procedure:

1. Device structure:

(1) For high-voltage driven LEDs, there is a capacitor at both ends of the LED in series with the LED, and the capacitor-LED capacitor is connected to the main power supply.

(2) For wirelessly driven LEDs, there are two parallel indium tin oxide (ITO) external electrodes (7 cm) * 7 cm), spaced 3.5 cm apart.

(3) Between the external electrodes is the sensing electrode-LED-sensing electrode module, which includes two parallel sensing electrodes connected by LEDs.

 2. Experimental steps:

(1) Apply an AC voltage to the external electrode, which is generated by a signal generator combined with an ATA-122D power amplifier;

(2) Use an oscilloscope to collect and output the output of the "LED in the capacitor", and use a photodiode to collect the brightness;

(3）An electrometer is used to collect the output of the vertical separation structure TENG.

Experimental results:

1. Comparing the output of the vertical separation structure TENG driving LED and the "LED in the capacitor" output, it can be found that the output of the two is basically the same.

2. Realize the high voltage drive of "LED in capacitor".

3. Realize the wireless drive of "LED in capacitor".

Result one:

Result two:

Result three: