Company Filing History:
2 out of 15,475 
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Years Active: 2022-2023
Title: Rujun Ma: Innovator in Electrostatic Devices
Introduction
Rujun Ma is a prominent inventor based in Los Angeles, CA. He has made significant contributions to the field of electrostatic devices, holding 2 patents that showcase his innovative approach to technology.
Latest Patents
One of Rujun Ma's latest patents is for an electrostatically actuated device. This device features a bottom electrode on a substrate and a top electrode separated by a fixed distance. Semi-insulator layers with appropriate electrical conductivity are attached to both electrodes. A flexible S-shaped polymer stack is disposed between the substrates, with one end attached to the top substrate and the other in contact with the bottom substrate. When a voltage is applied, the stack deflects in a rolling wave-like motion due to electrostatic force. Once the voltage is turned off, the static charges on the semi-insulator layer can quickly dissipate because of its proper electrical conductivity.
Another notable patent is for electrocaloric cooling with electrostatic actuation. This solid-state heat transporting device includes a heat transporting element that can control its uniformity of contact with one or multiple surfaces. The device utilizes the electrocaloric effect to absorb and release heat, with the uniformity of contact being modifiable through an electrostatic effect. In one embodiment, the heat transporting element is an electrostatically actuated P(VDF-TrFE-CFE) polymer stack, achieving a high specific cooling power of 2.8 W/g and a coefficient of performance (COP) of 13, which is the highest reported to date for such devices.
Career Highlights
Rujun Ma has worked with esteemed institutions such as the University of California and SRI International. His work in these organizations has allowed him to develop and refine his innovative ideas in electrostatic technology.
Collaborations
Throughout his career, Rujun Ma has collaborated with notable individuals, including Qibing Pei and Ziyang Zhang. These collaborations have contributed to the advancement of his research and inventions.
Conclusion
Rujun Ma is a distinguished inventor whose work in electrostatic devices has led to significant advancements in technology. His innovative patents reflect his expertise and commitment to pushing the boundaries of engineering.