TOUCH CONTROLLER FOR TOUCH-SENSING DISPLAY APPARATUS AND DRIVING METHOD THEREOF

• US 20120113045A1
• Filed: 01/07/2011
• Published: 05/10/2012
• Est. Priority Date: 11/05/2010
• Status: Active Grant

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Lai, Chih-Chang
• Granted Patent: US 8,941,598 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A driving method adapted to a touch-sensing display apparatus is provided. The touch-sensing display apparatus includes a display panel and a touch panel. The driving method includes following steps. I scan signals are sequentially sent to drive the display panel to receive a plurality of data signals. M driving signals are sequentially sent to drive the touch panel to generate a plurality of sensing signals during a sensing period. The m^th driving signal is synchronized with the i^th scan signal, wherein 1≦i≦I and 1≦m≦M. The touch panel is delayed by a predetermined time period within each pulse width of the M driving signals for generating the sensing signals. Furthermore, a touch controller is also provided.

Claims

1. A driving method, adapted to a touch-sensing display apparatus, the touch-sensing display apparatus comprising a display panel and a touch panel, and the driving method comprising:

sequentially sending I scan signals to drive the display panel to receive a plurality of data signals;

sequentially sending M driving signals to drive the touch panel to generate a plurality of sensing signals during a sensing period;

synchronizing an m^th driving signal with an i^th scan signal, wherein 1≦

i≦

I and 1≦

m≦

M; and

delaying the touch panel by a predetermined time period within each pulse width of the M driving signals for generating the sensing signals.

2. The driving method as claimed in claim 1, wherein the predetermined time period is less than a pulse width of the scan signals and is greater than a toggle time of the data signals.

3. The driving method as claimed in claim 2, wherein in the step of synchronizing the m^th driving signal with the i^th scan signal, a rising edge of the m^th driving signal is synchronized with a rising edge of the i^th scan signal.

4. The driving method as claimed in claim 3, wherein in the step of synchronizing the m^th driving signal with the i^th scan signal, m=1 and i=I.

5. The driving method as claimed in claim 1, wherein the predetermined time period is greater than a sum of a pulse width of the scan signals and a toggle time of the data signals and is less than the pulse width of the driving signals.

6. The driving method as claimed in claim 5, wherein in the step of synchronizing the m^th driving signal with the i^th scan signal, a rising edge of the m^th driving signal is synchronized with a rising edge of the i^th scan signal.

7. The driving method as claimed in claim 6, wherein the sensing period is between a rising edge and a falling edge of an (i+1)^th scan signal, wherein M<

I.

8. A touch controller, adapted to a touch display apparatus, the touch display apparatus comprising a display panel and a touch panel, and the touch controller comprising:

a driving unit coupled to the display panel and the touch panel, sequentially receiving I scan signals and sequentially sending M driving signals, synchronizing an m^th driving signal with an i^th scan signal, and delaying the touch panel by a predetermined time period within each pulse width of the M driving signals for generating a plurality of sensing signals during a sensing period, wherein 1≦

i≦

I and 1≦

m≦

M.

9. The touch controller as claimed in claim 8, wherein the I scan signals drive the display panel to receive a plurality of data signals, and the predetermined time period is less than a pulse width of the scan signals and is greater than a toggle time of the data signals.

10. The touch controller as claimed in claim 9, wherein the touch controller synchronizes a rising edge of the m^th driving signal with a rising edge of the i^th scan signal.

11. The touch controller as claimed in claim 10, wherein m=1, i=I and M<

I.

12. The touch controller as claimed in claim 9, wherein the display panel comprises a plurality of display scan lines, the touch panel comprises a plurality of touch scan lines, and the display scan lines and the touch scan lines are arranged along a first direction.

13. The touch controller as claimed in claim 8, wherein the predetermined time period is greater than a sum of a pulse width of the scan signals and a toggle time of the data signals and is less than the pulse width of the driving signals.

14. The touch controller as claimed in claim 13, wherein the driving unit synchronizes a rising edge of the m^th driving signal with a rising edge of the i^th scan signal.

15. The touch controller as claimed in claim 14, wherein the sensing period is between a rising edge and a falling edge of an (i+1)^th scan signal, wherein M<

I.

16. The touch controller as claimed in claim 8, wherein the display panel comprises a plurality of display scan lines, the touch panel comprises a plurality of touch scan lines, the display scan lines are arranged along a first direction, and the touch scan lines are arranged along a second direction.

17. The touch controller as claimed in claim 8, wherein the touch panel is a capacitive touch panel.