Cheng Chen

US Patent:

20210305488, Sep 30, 2021

Filed:

Jul 31, 2019

Appl. No.:

17/264686

Inventors:

- Oakland CA, US
Cheng Chen - Irvine CA, US
Amir Sharafi - Merced CA, US
Atousa Yazdani - Davis CA, US

International Classification:

H01L 41/113
H02N 2/18
H01L 41/04

Abstract:

Various embodiments include a mechanical amplification mechanism in a compact power unit of an electricity generator containing at least one piezoelectric element. The power units can be used singly but are also designed to be stacked, serially and/or in parallel with each other, and to be mounted within or under a substrate (e.g., a roadway or aircraft runway) such that the system achieves ultra-high-density of electricity production per unit area. Embodiments of the disclosed subject matter are therefore directed to a mechanical-to-electrical power generator, an accompanying power electronic-circuit, and power transmission and/or power saving into an energy-storage device. Therefore, the generated electrical power can be conditioned for, for example, transmitting to an electrical grid or for charging batteries of electrical vehicles. Other methods of formation of the power units and related systems are disclosed.

US Patent:

20190237008, Aug 1, 2019

Filed:

Oct 30, 2018

Appl. No.:

16/175546

Inventors:

- Cupertino CA, US
Haojiang ZHOU - Pasadena CA, US
Cheng CHEN - San Jose CA, US
Rui LIU - San Jose CA, US

International Classification:

G09G 3/3208

Abstract:

Aspects of the subject technology relate to electronic devices with displays. The display includes an array of display pixels and one or more display-light sensors that monitor the display light generated by the display pixels. Using the display-light sensors, corrections to control signals for the display pixels can be provided to correct for array non-uniformities and/or pixel degradation over time. The display-light sensors may be provided in an array of display-light sensors mounted parallel to the array of display pixels. The array of display-light sensors can be in-plane with the display pixels or vertically displaced from the display pixels. The display-light sensors may be prevented from receiving non-display light such as ambient light.

US Patent:

20150135453, May 21, 2015

Filed:

Jan 26, 2015

Appl. No.:

14/605036

Inventors:

Cheng Kai Chen - Pomona CA, US

International Classification:

A47L 13/142
A47L 13/44
A47L 13/20

US Classification:

151202

Abstract:

A spin mop includes a grip body casing. The grip body casing is an elongated member and hollow with an inside surface. The inside surface has a threaded panel assembly. The threaded panel assembly is formed in an elongated shape and has threaded panel threads alternating with threaded panel fillets. A clutch shaft extends into the grip body casing. The clutch shaft is telescopically mounted to the grip body casing. A clutch assembly is formed on the clutch shaft. The clutch assembly extends into the grip body casing. The clutch assembly further includes a first clutch member and a second clutch member. The first clutch member is rotably mounted to the clutch shaft. The second clutch member is fixed to the clutch shaft. A helical tooth is formed on an external surface of the first clutch member.

US Patent:

20150033484, Feb 5, 2015

Filed:

Jul 31, 2013

Appl. No.:

13/955202

Inventors:

Cheng Kai Chen - Pomona CA, US

International Classification:

A47L 13/14
A47L 13/42

US Classification:

151191

Abstract:

A spin mop includes a grip body casing. The grip body casing is an elongated member and hollow with an inside surface. The inside surface has a threaded panel assembly. The threaded panel assembly is formed in elongated shape and has threaded panel threads alternating with threaded panel fillets. A clutch shaft extends into the grip body casing. The clutch shaft is telescopically mounted to the grip body casing. A clutch assembly is formed on the clutch shaft. The clutch assembly extends into the grip body casing. The clutch assembly further includes a first clutch member and a second clutch member. The first clutch member is rotably mounted to the clutch shaft. The second clutch member is fixed to the clutch shaft. A helical tooth is formed on an external surface of the first clutch member.