Yu Chen

US Patent:

6825068, Nov 30, 2004

Filed:

Apr 17, 2001

Appl. No.:

09/836884

Inventors:

Kevin L. Denis - Beverly Farms MA
Yu Chen - Cambridge MA
Paul S. Drzaic - Lexington MA
Joseph M. Jacobson - Newton Centre MA
Peter T. Kazlas - Sudbury MA

Assignee:

E Ink Corporation - Cambridge MA

International Classification:

H01L 2100

US Classification:

438149, 438155

Abstract:

Transistors are formed by depositing at least one layer of semiconductor material on a substrate comprising a polyphenylene polyimide. The substrate permits the use of processing temperatures in excess of 300Â C. during the processes used to form the transistors, thus allowing the formation of high quality silicon semiconductor layers. The substrate also has a low coefficient of thermal expansion, which closely matches that of silicon, thus reducing any tendency for a silicon layer to crack or delaminate.

US Patent:

6945062, Sep 20, 2005

Filed:

Dec 4, 2003

Appl. No.:

10/728354

Inventors:

Yu Chen - East Hartford CT, US
Lili Zhang - East Hartford CT, US

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F25B049/00

US Classification:

622285, 417274

Abstract:

A heat pump water heater system includes a compressor that has a variable clearance volume that can be selectively controlled to control the mass flow rate of refrigerant from the compressor. Under higher ambient air temperature conditions, the variable volume is increased to keep refrigerant in a variable clearance volume chamber and to decrease the mass flow rate of the refrigerant from the compressor. Under lower ambient air temperature conditions the variable volume is decreased to increase the mass flow rate. The variable clearance volume allows for maintaining optimum system performance under a variety of ambient air temperature conditions.

US Patent:

6968708, Nov 29, 2005

Filed:

Jun 23, 2003

Appl. No.:

10/602114

Inventors:

Sivakumar Gopalnarayanan - Simsbury CT, US
Yu Chen - East Hartford CT, US
Tobias Sienel - Manchester CT, US
Lili Zhang - East Hartford CT, US

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F25D017/02

US Classification:

62186, 62408

Abstract:

A transcritical refrigeration system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated though the closed circuit system. Preferably, carbon dioxide is used as the refrigerant. A fan moves outdoor air that exchanges heat with the refrigerant across the evaporator. The speed of the fan is regulated to regulate the evaporator pressure and to adapt the evaporator to different environmental conditions to achieve the optimal coefficient of performance. During high ambient conditions, the fan speed is decreased, decreasing the refrigerant mass flowrate in the system. The energy exchange per unit mass of the refrigerant in the gas cooler increases and the work of the fan decreases, increasing the coefficient of performance of the system. During low ambient conditions, the mass flowrate of the system is low and there is more heat transfer thermal resistance on the refrigerant side at the evaporator. The speed of the fan is lowered to decrease the work of the fan.

US Patent:

7000413, Feb 21, 2006

Filed:

Jun 26, 2003

Appl. No.:

10/607283

Inventors:

Yu Chen - East Hartford CT, US
Lili Zhang - East Hartford CT, US

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F25B 41/04

US Classification:

62225, 62190, 62222, 62224

Abstract:

A refrigeration system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated though the closed circuit system. Preferably, carbon dioxide is used as the refrigerant. As carbon dioxide has a low critical point, systems utilizing carbon dioxide as a refrigerant usually require the refrigeration system to run transcritical. When the system is operating inefficiently, the system is modified so the system operates efficiently. First, a parameter of the system is monitored by a sensor and the then compared to a stored value to determine if the system is operating inefficiently. If the system is operating inefficiently, the system is modified to an efficient system.

US Patent:

7028494, Apr 18, 2006

Filed:

Aug 22, 2003

Appl. No.:

10/646253

Inventors:

Nicolas Pondicq-Cassou - Lyons, FR
Jean-Philippe Goux - Toussieu, FR
Yu Chen - East Hartford CT, US
Julio Concha - Rocky Hill CT, US
Tobias Sienel - Manchester CT, US
Sylvain Douzet - Beynost, FR

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F25D 21/06
F25B 41/00
F25B 49/00

US Classification:

621964, 62151, 62156

Abstract:

Refrigerant is circulated through a vapor compression system including a compressor, a gas cooler, an expansion device, and an evaporator. When a sensor detects that frozen water droplets form on the evaporator, a valve positioned between the discharge of the compression and inlet of expansion device is opened. Refrigerant from the discharge of the compressor bypasses the gas cooler and enters the inlet of the expansion device. The high temperature refrigerant melts the frost on the evaporator. As the frost melts, the passage of the evaporator is opened to allow air to flow through the evaporator.

US Patent:

7030412, Apr 18, 2006

Filed:

May 5, 2000

Appl. No.:

09/565413

Inventors:

Paul S. Drzaic - Lexington MA, US
Karl R. Amundson - Cambridge MA, US
Gregg M. Duthaler - Brookline MA, US
Peter T. Kazlas - Sudbury MA, US
Yu Chen - Cambridge MA, US

Assignee:

E Ink Corporation - Cambridge MA

International Classification:

H01L 29/04

US Classification:

257 59, 257 72

Abstract:

A thin-film transistor array comprises at least first and second transistors. Each transistor comprises a source electrode, a drain electrode a semiconductor electrode, a gate electrode, and a semiconductor layer. The semiconductor layer is continuous between the first and second transistors. The semiconductor layer is preferably unpatterned. In various display applications, the geometry of the transistors is selected to provide acceptable leakage currents. In a preferred embodiment, the transistor array is employed in an encapsulated electrophoretic display.

US Patent:

7051542, May 30, 2006

Filed:

Dec 17, 2003

Appl. No.:

10/738657

Inventors:

Yu Chen - East Hartford CT, US
Tobias H. Sienel - Easthampton MA, US
Lili Zhang - East Hartford CT, US

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F25B 13/00
F25B 41/04
F25D 17/00

US Classification:

62160, 62180, 62223, 62224

Abstract:

A vapor compression system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated through the system. The high side pressure of the vapor compression system is selected to optimize the heating capacity. In one example, the optimal high side pressure is obtained by determining the high side pressure that correlates to the maximum current required to operate to the water pump. In another example, the actual temperature of the water entering the gas cooler, the water exiting the gas cooler, and the ambient air temperature are measured and compared to a predetermined value to determine the optimal high side pressure.

US Patent:

7116318, Oct 3, 2006

Filed:

Apr 24, 2003

Appl. No.:

10/249618

Inventors:

Karl R. Amundson - Cambridge MA, US
Yu Chen - Allston MA, US
Kevin L. Denis - Beverly Farms MA, US
Paul S. Drzaic - Morgan Hill CA, US
Peter T. Kazlas - Sudbury MA, US
Andrew P. Ritenour - Medford MA, US

Assignee:

E Ink Corporation - Cambridge MA

International Classification:

G09G 5/00

US Classification:

345204, 345205, 345210, 345214

Abstract:

A display pixel unit provides reduced capacitative coupling between a pixel electrode and a source line. The unit includes a transistor, the pixel electrode, and the source line. The source line includes an extension that provides a source for the transistor. A patterned conductive portion is disposed adjacent to the source line.