DISABLING DISPLAY LINES DURING INPUT SENSING PERIODS

• US 20130342481A1
• Filed: 03/14/2013
• Published: 12/26/2013
• Est. Priority Date: 06/20/2012
• Status: Active Grant

• Current Assignee: Synaptics Incorporated
• Original Assignee: Synaptics Incorporated
• Inventors: MOREIN, Stephen, SMALL, Jeffrey A., SHEPELEV, Petr, LUDDEN, Christopher, MACKIN, Thomas
• Granted Patent: US 9,280,231 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

Embodiments of the present invention generally provide a processing system for a display device having an integrated sensing device. The processing system includes a driver module coupled to a plurality of transmitter electrodes. Each transmitter electrode includes one or more common electrodes configured for display updating and input sensing. The driver module is configured for selecting a first display line set for display updating during a first display update period and driving the first display line set for display updating during the first display update period. The driver module is further configured for driving one or more transmitter electrodes of the plurality of transmitter electrodes for input sensing during a non-display update period and selecting a second display line set for display updating during a restart period.

Claims

1. A processing system for a display device having an integrated sensing device, the processing system comprising:

a driver module comprising driver circuitry, the driver module coupled to a plurality of transmitter electrodes, each transmitter electrode comprising one or more common electrodes of a plurality of common electrodes configured for display updating and input sensing, the driver module configured for;

selecting a first display line set for display updating during a first display update period of a first display frame;

driving the first display line set for display updating during the first display update period;

driving one or more transmitter electrodes of the plurality of transmitter electrodes for input sensing during a non-display update period, wherein the non-display update period occurs after the first display update period and before a second display update period of the first display frame; and

selecting a second display line set for display updating during a restart period; and

a receiver module coupled to a plurality of receiver electrodes and configured for receiving resulting signals with the plurality of receiver electrodes when the one or more transmitter electrodes are driven for input sensing.

2. The processing system of claim 1, wherein the driver module is further coupled to a second set of registers configured for:

receiving a token from a first set of registers;

holding the token during the non-display update period; and

passing the token to a third set of registers.

3. The processing system of claim 2, wherein the driver module is further coupled to the first set of registers and the third set of registers, wherein:

the first set of registers is coupled to the first display line set and configured for;

receiving the token;

in response to receiving the token, selecting the first display line set for display updating during the first display update period; and

passing the token to the second set of registers; and

the third set of registers is coupled to the second display line set and configured for;

receiving the token from the second set of registers; and

in response to receiving the token, selecting the second display line set for display updating during the restart period.

4. The processing system of claim 1, wherein the driver module is further coupled to a delay logic unit configured for:

receiving a token; and

holding the token during the non-display update period.

5. The processing system of claim 4, where the delay logic unit is further configured for:

during the non-display update period, receiving a recirculate signal; and

in response to receiving the recirculate signal, holding the token.

6. The processing system of claim 4, wherein the driver module is further coupled to:

a first set of registers coupled to the first display line set and configured for;

receiving the token;

in response to receiving the token, selecting the first display line set for display updating during the first display update period; and

passing the token to the delay logic unit; and

a second set of registers coupled to the second display line set and configured for;

receiving the token from the delay logic unit; and

in response to receiving the token, selecting the second display line set for display updating during the restart period.

7. The processing system of claim 1, wherein the driver module is further configured for driving a plurality of source drivers to a reference voltage during the restart period.

8. The processing system of claim 1, wherein the non-display update period is at least as long as the first display update period.

9. An input device comprising a display device having an integrated sensing device, the input device comprising:

a plurality of transmitter electrodes, each transmitter electrode comprising one or more common electrodes of a plurality of common electrodes configured for display updating and input sensing;

a plurality of receiver electrodes;

a processing system coupled to the plurality of common electrodes and the plurality of receiver electrodes, the processing system configured to;

select a first display line set for display updating during a first display update period of a first display frame;

drive the first display line set for display updating during the first display update period;

drive one or more transmitter electrodes of the plurality of transmitter electrodes for input sensing during a non-display update period, wherein the non-display update period occurs after the first display update period and before a second display update period of the first display frame;

receive resulting signals with the plurality of receiver electrodes when the one or more transmitter electrodes are driven for input sensing; and

select a second display line set for display updating during a restart period.

10. The input device of claim 9, wherein the input device further comprises a second set of registers configured to:

receive a token from a first set of registers;

hold the token during the non-display update period; and

pass the token to a third set of registers.

11. The input device of claim 10, wherein the input device further comprises:

the first set of registers, wherein the first set of registers is coupled to the first display line set and configured to;

receive the token;

in response to receiving the token, select the first display line set for display updating during the first display update period; and

pass the token to the second set of registers; and

the third set of registers, wherein the third set of registers is coupled to the second display line set and configured to;

receive the token from the second set of registers; and

in response to receiving the token, select the second display line set for display updating during the restart period.

12. The input device of claim 10, wherein the input device further comprises a delay logic unit configured to:

receive a token; and

hold the token during the non-display update period.

13. The input device of claim 12, where the delay logic unit is further configured to:

during the non-display update period, receive a recirculate signal; and

in response to receiving the recirculate signal, hold the token.

14. The input device of claim 12, wherein the delay logic unit comprises a multiplexer, a logic gate, and a storage element.

15. The input device of claim 12, wherein the input device further comprises:

a first set of registers coupled to the first display line set and configured to;

receive the token;

in response to receiving the token, select the first display line set for display updating during the first display update period; and

pass the token to the delay logic unit; and

a second set of registers coupled to the second display line set and configured to;

receive the token from the delay logic unit; and

in response to receiving the token, select the second display line set for display updating during the restart period.

16. The input device of claim 11, wherein the first set of registers, the second set of registers, and the third set of registers are disposed on a thin-film transistor layer of the input device.

17. A method of input sensing with a display device integrated with a sensing device having a plurality of receiver electrodes and a plurality of transmitter electrodes, each transmitter electrode comprising one or more common electrodes of a plurality of common electrodes, the method comprising:

selecting a first display line set for display updating during a first display update period of a first display frame;

driving the first display line set for display updating during the first display update period;

driving one or more transmitter electrodes of the plurality of transmitter electrodes for input sensing during a non-display update period, wherein the non-display update period occurs after the first display update period and before a second display update period of the first display frame;

receiving resulting signals with the plurality of receiver electrodes when the one or more transmitter electrodes are driven for input sensing; and

selecting a second display line set for display updating during a restart period.

18. The method of claim 17, further comprising:

receiving a token with a first set of registers;

in response to receiving the token with the first set of registers, selecting the first display line set for display updating during the first display update period;

passing the token from the first set of registers to a second set of registers;

holding the token with the second set of registers during the non-display update period;

following the non-display update period, passing the token to a third set of registers;

receiving the token with the third set of registers; and

in response to receiving the token with the third set of registers, selecting the second display line set for display updating during the restart period.

19. The method of claim 17, further comprising:

receiving a token with a delay logic unit;

receiving a recirculate signal with the delay logic unit;

in response to receiving the recirculate signal, holding the token with the delay logic unit during the non-display update period; and

following the non-display update period, passing the token.

20. The method of claim 19, further comprising:

receiving the token with a first set of registers;

in response to receiving the token with the first set of registers, selecting the first display line set for display updating during the first display update period;

passing the token from the first set of registers to the delay logic unit;

receiving the token from the delay logic unit with a second set of registers; and

in response to receiving the token with the second set of registers, selecting the second display line set for display updating during the restart period.