Ronald W Hansen

US Patent:

6369784, Apr 9, 2002

Filed:

Sep 23, 1999

Appl. No.:

09/405281

Inventors:

Igor L. Maslennikov - Sunnyvale CA
Dennis M. Urbon - San Jose CA
Christopher J. Spindt - Menlo Park CA
Ronald L. Hansen - San Jose CA
Christopher J. Curtin - Los Altos Hills CA

Assignee:

Candescent Intellectual Property Services, Inc. - San Jose CA

International Classification:

G09G 300

US Classification:

345 752, 345 741, 345204, 345208, 313339, 713321

Abstract:

A field emission display having an improved operational life. In one embodiment of the present invention, the field emission display comprises a plurality of row lines, a plurality of column lines, and a plurality of electron emissive elements disposed at intersections of the plurality of row lines and column lines, a column driver circuit, and a row driver circuit. The column driver circuit is coupled to drive column voltage signals over the plurality of column lines; and, the row driver circuit is coupled to activate and deactivate the plurality of row lines with row voltage signals. Significantly, according to the present invention, operational life of the field emission display is substantially extended when the electron emissive elements are intermittently reverse-biased by the column voltage signals and the row voltage signals. In another embodiment, the row driver circuit is responsive to a SLEEP signal. The row driver circuit, upon receiving the SLEEP signal, drives a sleep-mode voltage over the row lines to reverse-bias the electron emissive elements.

US Patent:

6448949, Sep 10, 2002

Filed:

Jun 5, 2000

Appl. No.:

09/588267

Inventors:

Igor L. Maslennikov - Sunnyvale CA
Dennis M. Urbon - San Jose CA
Christopher J. Spindt - Menlo Park CA
Ronald L. Hansen - San Jose CA
Christopher J. Curtin - Los Altos Hills CA

Assignee:

Candescent Technologies Corporation - San Jose CA

International Classification:

G09G 300

US Classification:

345 74, 345 75, 345208, 3151691

Abstract:

A field emission display having an improved operational life. In one embodiment of the present invention, the field emission display comprises a plurality of row lines, a plurality of column lines, and a plurality of electron emissive elements disposed at intersections of the plurality of row lines and column lines, a column driver circuit, and a row driver circuit. The column driver circuit is coupled to drive column voltage signals over the plurality of column lines; and, the row driver circuit is coupled to activate and deactivate the plurality of row lines with row voltage signals. Significantly, according to the present invention, operational life of the field emission display is substantially extended when the electron emissive elements are intermittently reverse-biased by the column voltage signals and the row voltage signals. In another embodiment, the row driver circuit is responsive to a SLEEP signal. The row driver circuit, upon receiving the SLEEP signal, drives a sleep-mode voltage over the row lines to reverse-bias the electron emissive elements.

US Patent:

6541912, Apr 1, 2003

Filed:

Jul 26, 1999

Appl. No.:

09/361334

Inventors:

William C. Fritz - Menlo Park CA
Igor L. Maslennikov - Sunnyvale CA
Theodore S. Fahlen - San Jose CA
George B. Hopple - Palo Alto CA
Christopher J. Curtin - San Jose CA
Colin D. Stanners - San Jose CA
Petre H. Vatahov - San Jose CA
Christopher J. Spindt - Menlo Park CA
Ronald L. Hansen - San Jose CA

Assignee:

Candescent Technologies Corporation - San Jose CA

International Classification:

H01J 1724

US Classification:

313553, 313495, 313422, 417 48, 417 51

Abstract:

An apparatus for removing contaminants from a display device is disclosed. In one embodiment, an auxiliary chamber is adapted to be coupled to a surface of a display device such that contaminants within the display device can travel from the display device into the auxiliary chamber. A getter is disposed in the auxiliary chamber. The getter is adapted to capture the contaminants once the contaminants travel from the display device into the auxiliary chamber. In other embodiments, the getter is disposed in the border region surrounding the active area of the display.

US Patent:

6853135, Feb 8, 2005

Filed:

May 20, 2002

Appl. No.:

10/152589

Inventors:

William C. Fritz - Menlo Park CA, US
Igor L. Maslennikov - Sunnyvale CA, US
Theodore S. Fahlen - San Jose CA, US
George B. Hopple - Palo Alto CA, US
Christopher J. Curtin - San Jose CA, US
Colin D. Stanners - San Jose CA, US
Petre H. Vatahov - San Jose CA, US
Christopher J. Spindt - Menlo Park CA, US
Ronald L. Hansen - San Jose CA, US

Assignee:

Candescent Technologies Corporation - Los Gatos CA
Candescent Intellectual Property Services, Inc. - Los Gatos CA

International Classification:

H01J017/24

US Classification:

313553, 313495, 313422, 417 48, 417 51

Abstract:

An apparatus for removing contaminants from a display device is disclosed. In one embodiment, an auxiliary chamber is adapted to be coupled to a surface of a display device such that contaminants within the display device can travel from the display device into the auxiliary chamber. A getter is disposed in the auxiliary chamber. The getter is adapted to capture the contaminants once the contaminants travel from the display device into the auxiliary chamber. In other embodiments, the getter is disposed in the border region surrounding the active area of the display.

US Patent:

48599956, Aug 22, 1989

Filed:

Jun 30, 1987

Appl. No.:

7/068604

Inventors:

Ronald D. Hansen - Fremont CA
Clayton W. Mock - Mountain View CA
Abdo G. Kadifa - Palo Alto CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G09G 302

US Classification:

340710

Abstract:

Mouse emulation includes two modes, a host mode in which the pointer behaves as the pointer of the host system and an emulating mode in which the pointer behaves as the pointer of the target system being emulated. The display of the target system appears in an emulation window within the host system display. The user can switch from host mode to emulating mode by clicking a mouse key when the pointer is located in the emulation window which also serves to make the emulation window the input focus for receiving user input signals from the keyboard. The user can switch from emulating mode to host mode by depressing a STOP key, a keystroke which need not be provided to the emulator because it would not be provided to the target system's CPU. Mouse related data is transferred to the emulator through a data structure in a reserved memory space which a mouse application does not access, such as the BIOS area if an IBM PC is being emulated. A mouse driver which provides standard responses to service requests from the application retrieves this data from the data structure, making hardware ports or software emulating or bypassing such ports unnecessary.

US Patent:

61338931, Oct 17, 2000

Filed:

Aug 31, 1998

Appl. No.:

9/144213

Inventors:

Igor L. Maslennikov - Sunnyvale CA
Dennis M. Urbon - San Jose CA
Christopher J. Spindt - Menlo Park CA
Ronald L. Hansen - San Jose CA
Christopher J. Curtin - Los Altos Hills CA

Assignee:

Candescent Technologies, Inc. - San Jose CA

International Classification:

G09G 300

US Classification:

345 74

Abstract:

A field emission display having an improved operational life. In one embodiment of the present invention, the field emission display comprises a plurality of row lines, a plurality of column lines, and a plurality of electron emissive elements disposed at intersections of the plurality of row lines and column lines, a column driver circuit, and a row driver circuit. The column driver circuit is coupled to drive column voltage signals over the plurality of column lines; and, the row driver circuit is coupled to activate and deactivate the plurality of row lines with row voltage signals. Significantly, according to the present invention, operational life of the field emission display is substantially extended when the electron emissive elements are intermittently reverse-biased by the column voltage signals and the row voltage signals. In another embodiment, the row driver circuit is responsive to a SLEEP signal. The row driver circuit, upon receiving the SLEEP signal, drives a sleep-mode voltage over the row lines to reverse-bias the electron emissive elements.