Other

Naval University of Engineering

Jie Xu

Jingxin Yuan

Yi Han

Junjie Zhu

Weiwei Ye

Xingfa Sun

Ziling Nie

Tinghao Wu

Wenkai Xu

A multi-frequency uniformization carrier wave slope random distribution pulse width modulation method, includes: (1) selecting a required random carrier wave sequence and a modulating wave, and after the two are compared, generating a switch device drive signal for pulse width modulation; (2) determining a multiple n of an equivalent carrier frequency f of the random carrier wave sequence, and selecting a main circuit topology; and (3) inputting the switch device drive signal generated in (1) into the main circuit topology of (2) to perform multi-frequency uniformization carrier wave slope random distribution pulse width modulation. The disclosure can improve a frequency domain distribution bandwidth of a harmonic wave without changing the mean and variance of a random carrier wave sequence, and realizes uniform distribution of carrier waves and multiple harmonic peaks near a doubled frequency of the carrier waves in a wider frequency domain.

Multi-frequency uniformization carrier wave slope random distribution pulse width modulation method

A method of manufacturing a support film and a flexible organic light emitting diode (OLED) display device are provided. The support film includes a compound material having a chemical formula of ATiO, where A is a positive trivalent element. The method includes pressing a dried compound material to obtain a sheet product, sintering the sheet product to obtain a sheet sample, and depositing the sheet sample using laser pulse deposition on a first protective film to obtain the support film. Material of the support film can be waterproof.

Method of manufacturing a support film and flexible organic light emitting diode display device

Growing community of inventors

Wuhan, China

Jie Xu