Simultaneous touch sensor scanning and display refreshing for display-embedded touch sensors

• US 9,727,168 B2
• Filed: 07/29/2016
• Issued: 08/08/2017
• Est. Priority Date: 03/14/2013
• Status: Expired due to Fees

• Current Assignee: Neodrón Limited (Atlantic IP Services Limited)
• Original Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Inventors: Fuller, Andrew, Brunet, Samuel, Pant, Vivek, Hill, Christopher, Reynolds, Grahame
• Primary Examiner(s): Haley, Joseph
• Assistant Examiner(s): KIYABU, KARIN A
• Application Number:
  US15/224,132
• Publication Number:
  US 20160334928A1
• Time in Patent Office: 375 Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 5/12 Synchronisation between the display unit and other units, e.g. other display units, video-disc players

Abstract

In one embodiment, a method includes receiving a request to refresh a display for a refresh period, wherein the display is coupled to a touch sensor operable to detect touch input at the display. During a first phase of the refresh period, a first portion of the display is refreshed while the touch sensor a second portion and a third portion of the display is activated. The second portion and the third portion are a half screen distance apart. During a second phase of the refresh period, the second portion of the display is refreshed while the touch sensor at a fourth portion and a fifth portion of the display is activated. The fourth portion and the fifth portion are a half screen distance apart.

Claims

1. A method comprising:

receiving a request to refresh a display for a refresh period, wherein the display is coupled to a touch sensor operable to detect touch input at the display;

during a first phase of the refresh period;

refreshing a first portion of the display; and

while refreshing the first portion of the display, activating the touch sensor at a second portion and a third portion of the display, the second portion and the third portion being a half screen distance apart; and

during a second phase of the refresh period;

refreshing the second portion of the display; and

while refreshing the second portion of the display, activating the touch sensor at a fourth portion and a fifth portion of the display, the fourth portion and the fifth portion being a half screen distance apart.

2. The method of claim 1, wherein the second portion of the display adjoins the first portion of the display.

3. The method of claim 1, wherein the refresh period of the display is approximately 0.0167 seconds.

4. The method of claim 1, wherein:

an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one fourth of the display; and

the fifth portion of the display is the same as the first portion of the display.

5. The method of claim 1, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one sixth of the display.

6. The method of claim 1, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one eighth of the display.

7. The method of claim 1, further comprising:

during a third phase of the refresh period;

refreshing the fourth portion of the display; and

while refreshing the fourth portion of the display, activating the touch sensor at a sixth portion and a seventh portion of the display, the sixth portion and the seventh portion being a half screen distance apart.

8. A system, comprising:

a display;

a touch sensor coupled to the display and operable to detect touch input at the display; and

a controller coupled to the display and the touch sensor, the controller comprising logic that is configured, when executed, to refresh the display in a refresh period and activate the touch sensor in the refresh period;

wherein during a first phase of the refresh period;

the controller is configured to refresh a first portion of the display; and

while refreshing the first portion of the display, the controller is configured to activate the touch sensor at a second portion and a third portion of the display, the second portion and the third portion being a half screen distance apart; and

wherein during a second phase of the refresh period;

the controller is configured to refresh the second portion of the display; and

while refreshing the second portion of the display, the controller is configured to activate the touch sensor at a fourth portion and a fifth portion of the display, the fourth and fifth portion being a half screen distance apart.

9. The system of claim 8, wherein the second portion of the display adjoins the first portion of the display.

10. The system of claim 8, wherein the refresh period of the display is approximately 0.0167 seconds.

11. The system of claim 8, wherein:

an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one fourth of the display; and

the fifth portion of the display is the same as the first portion of the display.

12. The system of claim 8, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one sixth of the display.

13. The system of claim 8, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one eighth of the display.

14. The system of claim 8, further comprising:

during a third phase of the refresh period;

the controller is configured to refresh the fourth portion of the display; and

while refreshing the fourth portion of the display, the controller is configured to activate the touch sensor at a sixth portion and a seventh portion of the display, the sixth portion and the seventh portion being a half screen distance apart.

15. A non-transitory computer readable medium comprising logic operable, when executed by a processor, to:

receive a request to refresh a display for a refresh period, wherein the display is coupled to a touch sensor operable to detect touch input at the display;

during a first phase of the refresh period;

refresh a first portion of the display; and

while refreshing the first portion of the display, activate the touch sensor at a second portion and a third portion of the display, the second portion and the third portion being a half screen distance apart; and

during a second phase of the refresh period;

refresh the second portion of the display; and

while refreshing the second portion of the display, activate the touch sensor at a fourth portion and a fifth portion of the display, the fourth portion and the fifth portion being a half screen distance apart.

16. The non-transitory computer readable medium of claim 15, wherein the second portion of the display adjoins the first portion of the display.

17. The non-transitory computer readable medium of claim 15, wherein the refresh period of the display is approximately 0.0167 seconds.

18. The non-transitory computer readable medium of claim 15, wherein:

an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one fourth of the display; and

the fifth portion of the display is the same as the first portion of the display.

19. The non-transitory computer readable medium of claim 15, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one sixth of the display.

20. The non-transitory computer readable medium of claim 15, wherein an area of each of the first portion, the second portion, the third portion, the fourth portion, and the fifth portion is approximately one eighth of the display.

21. The non-transitory computer readable medium of claim 15, wherein the logic is further operable, when executed by the processor or another processor, to:

during a third phase of the refresh period;

refresh the fourth portion of the display; and

while refreshing the fourth portion of the display, activate the touch sensor at a sixth portion and a seventh portion of the display, the sixth portion and the seventh portion being a half screen distance apart.