Shih Kuao Chang

US Patent:

8482686, Jul 9, 2013

Filed:

Feb 7, 2013

Appl. No.:

13/762276

Inventors:

Ming Xu - Sunnyvale CA, US
Young Bae Park - San Jose CA, US
Zhibing Ge - Sunnyvale CA, US
Daisuke Nozu - Kita, JP
Cheng Chen - San Jose CA, US
Abbas Jamshidi Roudbari - Sunnyvale CA, US
Shih Chang Chang - Cupertino CA, US
Shawn R. Gettemy - San Jose CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G02F 1/141
G02F 1/133
G09G 5/00

US Classification:

349 37, 349 33, 349 34, 345206, 345214

Abstract:

Display ground plane structures may contain slits. Image pixel electrodes in the display may be arranged in rows and columns. Image pixels in the display may be controlled using gate lines that are associated with the rows and data lines that are associated with the columns. An electric field may be produced by each image pixel electrode that extends through a liquid crystal layer to an associated portion of the ground plane. The slits in the ground plane may have a slit width. Data lines may be located sufficiently below the ground plane and sufficiently out of alignment with the slits to minimize crosstalk from parasitic electric fields. A three-column inversion scheme may be used when driving data line signals into the display, so that pairs of pixels that straddle the slits are each driven with a common polarity. Gate line scanning patterns may be used that enhance display uniformity.

US Patent:

20120113154, May 10, 2012

Filed:

Nov 8, 2010

Appl. No.:

12/941751

Inventors:

Zhibing Ge - Sunnyvale CA, US
Yongman Lee - Pleasanton CA, US
Shih Chang Chang - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Hopil Bae - Sunnyvale CA, US
Ming Xu - Cupertino CA, US
Shawn Robert Gettemy - San Jose CA, US
Wei H. Yao - Palo Alto CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 3/36
G09G 5/10
G09G 5/00

US Classification:

345690, 345209, 345 88

Abstract:

Present techniques involve methods and systems of inversion patterns for pixels in a display. Inversion techniques involve driving image signals having a first polarity to data lines of a pixel matrix during a first time period and driving image signals having an opposite polarity to the data lines during a second time period. In some embodiments, the pixels may be configured to have electrodes having only two finger electrodes, thus widening the distance between electrodes and decreasing the susceptibility for crosstalk between pixels. In some embodiments, horizontal cross-talk of electromagnetic fields between pixels may be further reduced by configuring the data line driving scheme such that voltage polarity is flipped for the pixels along every two, three, or more data line columns. Furthermore, a Z inversion pattern may be employed to reduce the occurrence of undesirable display artifacts.

US Patent:

20120313881, Dec 13, 2012

Filed:

Mar 3, 2011

Appl. No.:

13/126416

Inventors:

Zhibing Ge - Sunnyvale CA, US
Cheng Ho Yu - Cupertino CA, US
Young-Bae Park - San Jose CA, US
Abbas Jamshidi Roudbari - Sunnvale CA, US
Shih Chang Chang - San Jose CA, US
Cheng Chen - Cupertino CA, US
Marduke yousefpor - San Jose CA, US
John Zhong - Cupertino CA, US

International Classification:

G06F 3/044

US Classification:

345174

Abstract:

Electrical shield line systems are provided for openings in common electrodes near data lines of display and touch screens. Some displays, including touch screens, can include multiple common electrodes (Vcom) that can have openings between individual Vcoms. Some display screens can have an open slit between two adjacent edges of Vcom. Openings in Vcom can allow an electric field to extend from a data line through the Vcom layer. A shield can be disposed over the Vcom opening to help reduce or eliminate an electric field from affecting a pixel material, such as liquid crystal. The shield can be connected to a potential such that electric field is generated substantially between the shield and the data line to reduce or eliminate electric fields reaching the liquid crystal.

US Patent:

20130044120, Feb 21, 2013

Filed:

Aug 19, 2011

Appl. No.:

13/213805

Inventors:

Zhibing Ge - Sunnyvale CA, US
Meizi Jiao - Cupertino CA, US
Jun Qi - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Young Bae Park - San Jose CA, US
Shih Chang Chang - Cupertino CA, US
Victor Hao-En Yin - Cupertino CA, US
John Z. Zhong - Cupertino CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 5/02
H01L 33/08
G02F 1/1335

US Classification:

345589, 349110, 438 30

Abstract:

Systems, methods, and devices are provided for an electronic display with thermally compensated pixels. Such an electronic display may have an array of pixels, at least some of which may be thermally compensated pixels that exhibit reduced color shift over a 20 C. change in temperature. These thermally compensated pixels may have numbers of pixel electrode fingers, pixel electrode widths and spacings, cell gap depths, and/or pixel edge distances that cause the array of pixels to exhibit a reduced color shift than otherwise (e.g., a color shift of less than delta u′v′ of about 0.0092 from a starting white point) when the temperature of the electronic display changes from about 30 C. to about 50 C.

US Patent:

20130241900, Sep 19, 2013

Filed:

Mar 14, 2012

Appl. No.:

13/420197

Inventors:

Zhibing Ge - Sunnyvale CA, US
Shih Chang Chang - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Hopil Bae - Sunnyvale CA, US
Ming Xu - Sunnyvale CA, US
Shawn Robert Gettemy - San Jose CA, US
Wei H. Yao - Palo Alto CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 3/36
G01J 3/46
G06F 3/038

US Classification:

345204, 345 87, 29593

Abstract:

Systems, methods, and devices for adjusting a white point of a liquid crystal display (LCD) using column inversion are provided. In one example, a method includes measuring white points of an electronic display that occur when the display employs different column inversion schemes. The display may be programmed to perform the column inversion scheme that produces a white point closest to a desired white point.

US Patent:

20130241901, Sep 19, 2013

Filed:

Mar 14, 2012

Appl. No.:

13/420270

Inventors:

Hopil Bae - Sunnyvale CA, US
Zhibing Ge - Sunnyvale CA, US
Shih Chang Chang - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Ming Xu - Sunnyvale CA, US
Shawn Robert Gettemy - San Jose CA, US
Wei H. Yao - Palo Alto CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 3/36
G06F 3/038

US Classification:

345204, 345 87

Abstract:

Systems, methods, and devices for performing column inversion using 2-column demultiplexers are provided. In one example, an electronic display may include a display panel with columns of pixels configured to be programmed with frames of image data and display driver circuitry. The display driver circuitry may include three demultiplexers, each respectively coupled to one pixel column of a first superpixel and one pixel column of a second superpixel. Each of the three demultiplexers may receive amplified image data of a single polarity per frame.

US Patent:

20130241958, Sep 19, 2013

Filed:

Mar 14, 2012

Appl. No.:

13/420155

Inventors:

Hopil Bae - Sunnyvale CA, US
Zhibing Ge - Sunnyvale CA, US
Shih Chang Chang - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Ming Xu - Sunnyvale CA, US
Shawn Robert Gettemy - San Jose CA, US
Wei H. Yao - Palo Alto CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 3/36
G09G 5/10
G06F 3/038

US Classification:

345690, 345204, 345 88

Abstract:

Systems, methods, and devices for column inversion are provided. In one example, an electronic display may include a display panel having columns of pixels and display driver circuitry. The display driver circuitry may include source amplifiers and demultiplexers. Each demultiplexer may channel data output by at least one source amplifier to one of three columns of pixels. The display driver circuitry may drive the display panel according to a 3-column inversion scheme using one source amplifier per demultiplexer per frame of image data.

US Patent:

20130241959, Sep 19, 2013

Filed:

Mar 14, 2012

Appl. No.:

13/420234

Inventors:

Zhibing Ge - Sunnyvale CA, US
Shih Chang Chang - Cupertino CA, US
Cheng Chen - Cupertino CA, US
Hopil Bae - Sunnyvale CA, US
Ming Xu - Sunnyvale CA, US
Shawn Robert Gettemy - San Jose CA, US
Wei H. Yao - Palo Alto CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

G09G 5/10
G06F 3/038

US Classification:

345690, 345204

Abstract:

Systems, methods, and devices for reducing the loss of transmittance caused by column inversion. To provide one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. Adjacent columns that are driven at like polarity are spaced more closely than adjacent columns driven at opposite polarities.