Touch panel controller and semiconductor device

1. A touch panel controller which controls a touch panel having a detection plane superposed on a display plane of a display device arranged so that a display action is performed in synchronization with scan-driving of display-scan electrodes, and which scan-drives an array of detection-scan electrodes of the touch panel to perform a touch detection, comprising

a control part,

wherein the control part sets a detection frame cycle of the detection plane to 1/n of a display frame cycle for the display plane (n is a positive integer), and

the control part decides an order of driving the detection-scan electrodes in each detection frame cycle according to a predetermined phase-delay position and a predetermined phase-advance position with respect to a display-scan electrode drive position of the display device so as to correspond to an order of the detection-scan electrode array of the touch panel.

2. The touch panel controller according to claim 1 , wherein the control part decides the order of driving the detection-scan electrodes in:

a first drive form for driving the detection-scan electrodes having predetermined phase differences in a phase-advance direction with respect to a display-scan electrode drive position of the display device;

a second drive form for driving the detection-scan electrodes having predetermined phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device, and the detection-scan electrodes having predetermined phase differences in a phase-delay direction with respect to a display-scan electrode drive position of the display device; and

a third drive form for driving the detection-scan electrodes having predetermined phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

3. The touch panel controller according to claim 2 , wherein the control part sets the detection frame cycle to one half of the display frame cycle,

in the first drive form, the control part drives the detection-scan electrodes having the first and second phase differences, in the phase-advance direction with respect to a display-scan electrode drive position of the display device,

in the second drive form, the control part drives the detection-scan electrode having the first phase difference in the phase-advance direction with respect to a display-scan electrode drive position of the display device, and the detection-scan electrode having the first phase difference in the phase-delay direction with respect to a display-scan electrode drive position of the display device, and

in the third drive form, the control part drives the detection-scan electrodes having the first and second phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

4. The touch panel controller according to claim 3 , wherein the first phase difference is one-fourth cycle, and the second phase difference is three-fourths cycle.

5. The touch panel controller according to claim 4 , wherein the control part drives the detection-scan electrodes in the first drive form and subsequently, in the second drive form in a first half detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in the latter half detection frame cycle of the display frame cycle,

assuming that 4m detection-scan electrodes numbered 1 to 4m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 4m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+1)/2 when k=1, 3, 5, . . . , 4m−1; and

(3m+k/2)mod(4m) when k=2, 4, 6, . . . , 4m.

6. The touch panel controller according to claim 2 , wherein the control part sets the detection frame cycle to one half of the display frame cycle,

in the first drive form, the control part drives the detection-scan electrodes having the first and second phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device,

in the second drive form, the control part drives: the detection-scan electrode having the first phase difference in the phase-advance direction with respect to a display-scan electrode drive position of the display device; and the detection-scan electrode having the third phase difference in the phase-delay direction with respect to a display-scan electrode drive position of the display device, and

in the third drive form, the control part drives the detection-scan electrodes having the third and fourth phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

7. The touch panel controller according to claim 6 , wherein the first phase difference is three-eighths cycle,

the second phase difference is a seven-eighths cycle,

the third phase difference is one-eighth cycle, and

the fourth phase difference is five-eighths cycle.

8. The touch panel controller according to claim 7 , wherein the control part drives the detection-scan electrodes in the first drive form and subsequently, in the second drive form in a first half detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in the latter half detection frame cycle of the display frame cycle,

assuming that 8m detection-scan electrodes numbered 1 to 8m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 8m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

3m+(k+1)/2 when k=1, 3, 5, . . . , 8m−1; and

(7m+k/2)mod(8m) when k=2, 4, 6, . . . , 8m.

9. The touch panel controller according to claim 6 , wherein the first phase difference is one-eighth cycle,

the second phase difference is five-eighths cycle,

the third phase difference is three-eighths cycle, and

the fourth phase difference is seven-eighths cycle.

10. The touch panel controller according to claim 9 , wherein the control part drives the detection-scan electrodes in the first drive form and subsequently, in the second drive form in a first half detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in the latter half detection frame cycle of the display frame cycle,

assuming that 8m detection-scan electrodes numbered 1 to 8m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 8m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+1)/2 when k=1, 3, 5, . . . , 8m−1; and

(5m+k/2)mod(8m) when k=2, 4, 6, . . . , 8m.

11. The touch panel controller according to claim 2 , wherein the control part sets the detection frame cycle to one-third of the display frame cycle,

in the first drive form, the control part drives the detection-scan electrodes having the first to third phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device,

in the second drive form, the control part drives: the detection-scan electrodes having the first and second phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device; and the detection-scan electrodes having the first and second phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device,

in the third drive form, the control part drives the detection-scan electrodes having the first to third phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

12. The touch panel controller according to claim 11 , wherein the first phase difference is one-sixth cycle,

the second phase difference is three-sixths cycle, and

the third phase difference is five-sixths cycle.

13. The touch panel controller according to claim 12 , wherein the control part drives the detection-scan electrodes in first drive form and subsequently, in the second drive form in a first detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form in a second detection frame cycle of the display frame cycle subsequent thereto, and

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in a third detection frame cycle of the display frame cycle,

assuming that 6m detection-scan electrodes numbered 1 to 6m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 6m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+2)/3 when k=1, 4, 7, . . . , 6m−2;

3m+(k+1)/3 when k=2, 5, 8, . . . , 6m−1; and

(5m+k/3)mod(6m) when k=3, 6, 9, . . . , 6m.

14. The touch panel controller according to claim 2 , wherein the control part sets the detection frame cycle to one-fourth of the display frame cycle,

in the first drive form, the control part drives the detection-scan electrodes having the first to fourth phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device,

in the second drive form, the control part drives the detection-scan electrodes having the first to third phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device, and the detection-scan electrodes having the first to third phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device, and

in the third drive form, the control part drives the detection-scan electrodes having the first to fourth phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

15. The touch panel controller according to claim 14 , wherein the first phase difference is one-eighth cycle,

the second phase difference is three-eighths cycle,

the third phase difference is five-eighths cycle, and

the fourth phase difference is seven-eighths cycle.

16. The touch panel controller according to claim 15 , wherein the control part drives the detection-scan electrodes in first drive form and subsequently, in the second drive form in a first detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form in second to third detection frame cycles of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in a fourth detection frame cycle of the display frame cycle,

assuming that 8m detection-scan electrodes numbered 1 to 8m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 8m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+3)/4 when k=1, 5, 9, . . . , 8m−3;

3m+(k+2)/4 when k=2, 6, 10, . . . , 8m−2;

5m+(k+1)/4 when k=3, 7, 11, . . . , 8m−1; and

(7m+k/4)mod(8m) when k=4, 8, 12, . . . , 8m.

17. The touch panel controller according to claim 2 , wherein the control part sets the detection frame cycle to one half of the display frame cycle,

in the first drive form, the control part drives the detection-scan electrodes having the first phase difference and a phase difference in the vicinity thereof, and the second phase difference and a phase difference in the vicinity thereof in the phase-advance direction with respect to a display-scan electrode drive position of the display device,

in the second drive form, the control part drives: the detection-scan electrodes having the first phase difference and a phase difference in the vicinity thereof in the phase-advance direction with respect to a display-scan electrode drive position of the display device; and the detection-scan electrodes having the first phase difference and a phase difference in the vicinity thereof in the phase-delay direction with respect to a display-scan electrode drive position of the display device, and

in the third drive form, the control part drives the detection-scan electrodes having the first phase difference and a phase difference in the vicinity thereof, and the second phase difference and a phase difference in the vicinity thereof in the phase-delay direction with respect to a display-scan electrode drive position of the display device.

18. The touch panel controller according to claim 17 , wherein the first phase difference is one-fourth cycle, and the second phase difference is three-fourths cycle.

19. The touch panel controller according to claim 18 , wherein the control part drives the detection-scan electrodes in the first drive form and subsequently, in the second drive form in a first half detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in the latter half detection frame cycle of the display frame cycle,

assuming that 4m detection-scan electrodes numbered 1 to 4m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 4m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+1)/2 when k=1, 5, 9, . . . , 4m−3;

(3m+k/2)mod(4m) when k=2, 6, 10, . . . , 4m−2;

{3m+(k+1)/2} mod(4m) when k=3, 7, 11, . . . , 4m−1; and

m+k/2 when k=4, 8, 12, . . . , 4m.

20. The touch panel controller according to claim 18 , wherein the control part drives the detection-scan electrodes in the first drive form and subsequently, in the second drive form in a first half detection frame cycle of the display frame cycle,

the control part drives the detection-scan electrodes in the second drive form and subsequently, in the third drive form in the latter half detection frame cycle of the display frame cycle,

assuming that 4m detection-scan electrodes numbered 1 to 4m (m is a positive integer) are driven in each detection frame cycle, the k-th detection-scan electrode to be driven (k is a natural number up to 4m) in the order of driving the detection-scan electrodes in each detection frame cycle, corresponding to the order of the detection-scan electrode array, has an array number given by:

m+(k+1)/2 when k=1, 7, 13, . . . , 4m−5;

(3m+k/2)mod(4m) when k=2, 8, 14, . . . , 4m−4;

{3m+(k+1)/2} mod(4m) when k=3, 9, 15, . . . , 4m−3;

{3m+(k+3)/2} mod(4m) when k=4, 10, 16, . . . , 4m−2;

m+(k−1)/2 when k=5, 11, 17, . . . , 4m−1; and

m+k/2 when k=6, 12, 18, . . . , 4m.

21. A semiconductor device comprising:

a display controller which scan-drives display-scan electrodes of a display device every cycle of a frame synchronizing signal to perform display control of the display device; and

a touch panel controller which scan-drives detection-scan electrodes of a touch panel having a detection plane superposed on a display plane of the display device to perform a touch detection,

wherein the touch panel controller sets a detection frame cycle of the detection plane to 1/n (n is a positive integer) of a display frame cycle according to the frame synchronizing signal to the display plane, and

the touch panel controller decides an order of driving the detection-scan electrodes in each detection frame cycle according to a predetermined phase-delay position and a predetermined phase-advance position with respect to a display-scan electrode drive position of the display device so as to correspond to an order of the detection-scan electrode array of the touch panel.

22. The semiconductor device according to claim 21 , wherein the touch panel controller decides the order of driving the detection-scan electrodes in:

a first drive form for driving the detection-scan electrodes having predetermined phase differences in a phase-advance direction with respect to a display-scan electrode drive position of the display device;

a second drive form for driving the detection-scan electrodes having predetermined phase differences in the phase-advance direction with respect to a display-scan electrode drive position of the display device, and the detection-scan electrodes having predetermined phase differences in a phase-delay direction with respect to a display-scan electrode drive position of the display device; and

a third drive form for driving the detection-scan electrodes having predetermined phase differences in the phase-delay direction with respect to a display-scan electrode drive position of the display device.