Devices and methods to compensate for image color variance due to display temperatures

• US 9,618,807 B2
• Filed: 09/04/2012
• Issued: 04/11/2017
• Est. Priority Date: 09/04/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Chu, Chia-Ching
• Primary Examiner(s): Arendt, Paisley L
• Assistant Examiner(s): DAVISON, ANGELA K
• Application Number:
  US13/603,134
• Publication Number:
  US 20140063422A1
• Time in Patent Office: 1,680 Days
• Field of Search: 349 20, 349 72, 349 85, 349106, 349114, 349145, 349111, 349108-110, 349115, 345 63, 345 72, 345 83, 345101, 345690, 345695, 345 88- 90, 348761, 348791
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

Methods and devices to compensate for image color variance due to display temperatures are provided. In one example, a display of an electronic device may include a first pixel section that has multiple pixels. The pixels may include a red subpixel, green subpixel, and blue subpixel that each has a respective aperture ratio. The display may also include a second pixel section that has multiple pixels. Again, the pixels may include a red subpixel, green subpixel, and blue subpixel that each has a respective aperture ratio. One or more of the subpixel aperture ratios of the first pixel section may be greater than a respective one or more of the subpixel aperture ratios of the second section to overcome image color variance that may exist due to temperature variations of the display.

Claims

1. A display of an electronic device comprising:

a first pixel section having a first plurality of pixels, wherein each pixel of the first plurality of pixels consists essentially of a first red subpixel having a first aperture ratio, a first green subpixel having a second aperture ratio, and a first blue subpixel having a third aperture ratio; and

a second pixel section having a second plurality of pixels, wherein each pixel of the second plurality of pixels consists essentially of a second red subpixel having a fourth aperture ratio, a second green subpixel having a fifth aperture ratio, and a second blue subpixel having a sixth aperture ratio, wherein the second pixel section is disposed nearer to a heat producing component of the electronic device than the first pixel section, and the heat producing component causes the second pixel section to operate at a greater temperature than the first pixel section;

wherein the first aperture ratio is greater than the fourth aperture ratio, the second aperture ratio is greater than the fifth aperture ratio, and the third aperture ratio is greater than the sixth aperture ratio.

2. The display of claim 1, wherein a first sum comprises the first aperture ratio, the second aperture ratio, and the third aperture ratio and a second sum comprises the fourth aperture ratio, the fifth aperture ratio, and the sixth aperture ratio, and wherein the first sum is greater than the second sum.

3. The display of claim 1, wherein the heat producing component comprises a processor, a power supply, or a battery, or any combination thereof.

4. The display of claim 1, wherein the first pixel section comprises a central portion of the display and the second pixel section comprises a border portion of the display.

5. The display of claim 1, comprising a third pixel section having a third plurality of pixels, wherein each of the third plurality of pixels consists essentially of a third red subpixel having a seventh aperture ratio, a third green subpixel having a eighth aperture ratio, and a third blue subpixel having a ninth aperture ratio, and wherein the first aperture ratio is greater than the seventh aperture ratio, the second aperture ratio is greater than the eighth aperture ratio, and the third aperture ratio is greater than the ninth aperture ratio, wherein the third pixel section is disposed nearer to the heat producing component of the electronic device than the first pixel section and the second pixel section and the heat producing component causes the third pixel section to operate at a greater temperature than the first pixel section and the second pixel section.

6. The display of claim 1, comprising a black mask configured to form apertures corresponding to the first aperture ratio, the second aperture ratio, the third aperture ratio, the fourth aperture ratio, the fifth aperture ratio, and the sixth aperture ratio.

7. The display of claim 1, comprising a thin-film transistor layer configured to form apertures corresponding to the first aperture ratio, the second aperture ratio, the third aperture ratio, the fourth aperture ratio, the fifth aperture ratio, and the sixth aperture ratio.

8. The display of claim 1, wherein each pixel of the first plurality of pixels comprises a first white subpixel having a seventh aperture ratio and each pixel of the second plurality of pixels comprises a second white subpixel having an eighth aperture ratio, and wherein the seventh aperture ratio is greater than the eighth aperture ratio.

9. The display of claim 1, wherein the intensity of light produced by the first pixel section is greater than the intensity of light produced by the second pixel section.

10. The display of claim 1, wherein each ratio of the first aperture ratio, the second aperture ratio, the third aperture ratio, the fourth aperture ratio, the fifth aperture ratio, and the sixth aperture ratio is greater than 0 and less than 1.

11. A method of manufacturing a consumer electronic device, comprising:

providing a display device, wherein the display device comprises;

a plurality of subpixels disposed across the display device in a first portion and a second portion, wherein the second portion is nearer to a heat generating component than the first portion, each subpixel comprises an aperture ratio, and the plurality of subpixels comprises first color subpixels having a first color, second color subpixels having a second color, and third color subpixels having a third color,

wherein the aperture ratios of the first color subpixels in the second portion are less than the aperture ratios of the first color subpixels in the first portion, and the aperture ratios of the second color subpixels in the second portion are equal to the aperture ratios of the second color subpixels in the first portion; and

coupling a processing device to the display device.

12. The method of claim 11, comprising disposing the display device and the processing device in a housing.

13. A display device comprising:

a plurality of subpixels disposed across the display device in a first portion and a second portion, wherein the second portion is nearer to a heat generating component than the first portion, each subpixel comprises an aperture ratio, and the plurality of subpixels comprises first color subpixels having a first color, second color subpixels having a second color, and third color subpixels having a third color,

wherein the aperture ratios of the first color subpixels in the second portion are less than the aperture ratios of the first color subpixels in the first portion, and the aperture ratios of the second color subpixels in the second portion are equal to the aperture ratios of the second color subpixels in the first portion.

14. The display device of claim 13, wherein the second portion comprises a border portion of the display device.

15. An electronic device comprising:

a display device comprising;

a plurality of subpixels disposed across the display device in a first portion and a second portion, wherein the second portion is nearer to a heat generating component than the first portion, each subpixel comprises an aperture ratio, and the plurality of subpixels comprises first color subpixels having a first color, second color subpixels having a second color, and third color subpixels having a third color,

wherein the aperture ratios of the first color subpixels in the second portion are less than the aperture ratios of the first color subpixels in the first portion, and the aperture ratios of the second color subpixels in the second portion are equal to the aperture ratios of the second color subpixels in the first portion; and

a liquid crystal display (LCD) panel comprising the plurality of subpixels arranged in rows and columns, wherein the first portion comprises a first section of the LCD panel, the second portion comprises a second section of the LCD panel, wherein the second section of the LCD panel operates at greater temperatures than the first section of the LCD panel; and

wherein the aperture ratios of the first color subpixels in the second portion are sized based at least in part on proximity to the heat generating component.

16. The electronic device of claim 15, wherein the plurality of subpixels includes a red subpixel, a green subpixel, a blue subpixel, and a white subpixel.