John Z Zhong

US Patent:

6865525, Mar 8, 2005

Filed:

Jan 30, 2001

Appl. No.:

09/774989

Inventors:

John Xiaoxiong Zhong - Fremont CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F017/50

US Classification:

703 14

Abstract:

A method and apparatus for simulating a circuit is described. In one embodiment, the method comprises representing a plurality of identical components in a reduced form as a circuit having a single instance of the identical component with encoding for each input of the single instance to represent corresponding inputs to all of the plurality of identical components and decoding for each output port of the single instance to create output ports for the outputs associated with all of the plurality of identical components and symbolically simulating the reduced form of the circuit with simulation results being the same as results of symbolically simulating the plurality of identical components.

US Patent:

6938228, Aug 30, 2005

Filed:

Jul 19, 2002

Appl. No.:

10/199539

Inventors:

John Xiaoxiong Zhong - Fremont CA, US

Assignee:

Synopsys, Inc. - Mountain View CA

International Classification:

G06F017/50

US Classification:

716 4, 716 5, 703 14, 703 19

Abstract:

A method and apparatus for simulating multiple stimuli using symbolic encoding. In one embodiment, the method comprises encoding a plurality of sets of stimulus to create a symbolic stimulus, symbolically simulating a device under test, including applying the symbolic stimulus to the device under test, and outputting a symbolic result from the device under test in response to the symbolic stimulus.

US Patent:

7522236, Apr 21, 2009

Filed:

Sep 23, 2005

Appl. No.:

11/234789

Inventors:

Shawn R. Gettemy - San Jose CA, US
John Z. Zhong - Cupertino CA, US
Sherridythe Anne Fraser - Saratoga CA, US
Wei Chen - Palo Alto CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G02F 1/1335
G02F 1/1333
G02F 1/1339

US Classification:

349114, 349110, 349153

Abstract:

One embodiment of the present invention provides a transflective display in which a border area adjacent to an active area has a reflectivity that is substantially the same as the active area when the display is turned off. This display includes a polarizer layer, a color filter glass (CFG) layer, a liquid crystal layer, and a reflector layer. The CFG layer contains color filters in the active area, while the border area of the CFG layer is designed to have a reflectivity that is substantially the same as the active area when the display is turned off.

US Patent:

7683983, Mar 23, 2010

Filed:

Aug 8, 2006

Appl. No.:

11/500677

Inventors:

John Z. Zhong - Cupertino CA, US
Wei Chen - Palo Alto CA, US
Cheng Chen - Kent OH, US
Victor H. E. Yin - Cupertino CA, US
Shawn R. Gettemy - San Jose CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G02F 1/1335

US Classification:

349 98, 349 96

Abstract:

One embodiment of the present invention provides a display that emits circularly-polarized light. This display includes a display mechanism that emits linearly-polarized light and a layer placed in the path of the linearly-polarized light. The layer receives the linearly-polarized light on one surface, converts the linearly-polarized light to circularly-polarized light, and then emits the circularly-polarized light from another surface. By emitting circularly-polarized light, the display reduces the perceived distortion found at some angles when the display is viewed through a linearly-polarizing filter.

US Patent:

7810355, Oct 12, 2010

Filed:

Jun 30, 2008

Appl. No.:

12/165336

Inventors:

Casey J. Feinstein - San Jose CA, US
John Z. Zhong - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

C03C 25/00
C03C 21/00

US Classification:

65 301, 65 3014, 65 31, 65105, 216 20, 216 83, 216 97

Abstract:

Methods and apparatus for protecting the thin films during chemical and/or thermal edge strengthening treatment. In one embodiment, a portion of each individual sheet is laminated. Pairs of sheets are then sealed together such that the thin film sides face inward to form a thin film sandwich. In some embodiments, the sandwich in then immersed in a chemical strengthener. In other embodiments, a localized treatment is applied to the unstrengthened edges.

US Patent:

7841759, Nov 30, 2010

Filed:

Oct 10, 2007

Appl. No.:

11/870360

Inventors:

Wei Chen - Palo Alto CA, US
Jun Qi - Corona CA, US
Victor Yin - Cupertino CA, US
John Zhong - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

F21V 33/00

US Classification:

362612, 362800

Abstract:

An LED backlight method and apparatus for display systems provides a plurality of light emitting diodes having different white point colors. At least two of the light emitting diodes having different white point colors are selected to produce a light of a predetermined white point color when the light outputs of the selected light emitting diodes are mixed. The selected light emitting diodes are mounted on a display panel in a predetermined order at spatially distributed positions for mixing their light outputs to produce the light of the predetermined white point color to illuminate the display panel with the light of the predetermined white point color.

US Patent:

7859521, Dec 28, 2010

Filed:

Apr 8, 2010

Appl. No.:

12/756834

Inventors:

Steven Porter Hotelling - San Jose CA, US
Marduke Yousefpor - San Jose CA, US
Shih Chang Chang - Cupertino CA, US
John Z. Zhong - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G09G 5/00

US Classification:

345173, 178 1803

Abstract:

Displays with touch sensing circuitry integrated into the display pixel stackup are provided. Circuit elements, such as touch signal lines, such as drive lines and sense lines, grounding regions, in the display pixel stackups can be grouped together to form touch sensing circuitry that senses a touch on or near the display. An integrated touch screen can include multi-function circuit elements that can operate as circuitry of the display system to generate an image on the display, and can also form part of a touch sensing system that senses one or more touches on or near the display. The multi-function circuit elements can be, for example, capacitors in display pixels that can be configured to operate as storage capacitors/electrodes, common electrodes, conductive wires/pathways, etc. , of the display circuitry in the display system, and that may also be configured to operate as circuit elements of the touch sensing circuitry.

US Patent:

7911565, Mar 22, 2011

Filed:

Jan 19, 2010

Appl. No.:

12/689762

Inventors:

John Z. Zhong - Cupertino CA, US
Wei Chen - Palo Alto CA, US
Cheng Chen - Kent OH, US
Victor H. E. Yin - Cupertino CA, US
Shawn R. Gettemy - San Jose CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G02F 1/1335

US Classification:

349 98, 349 96

Abstract:

One embodiment of the present invention provides a display that emits circularly-polarized light. This display includes a display mechanism that emits linearly-polarized light and a layer placed in the path of the linearly-polarized light. The layer receives the linearly-polarized light on one surface, converts the linearly-polarized light to circularly-polarized light, and then emits the circularly-polarized light from another surface. By emitting circularly-polarized light, the display reduces the perceived distortion found at some angles when the display is viewed through a linearly-polarizing filter.