Touch controller for touch-sensing display apparatus and driving method thereof

• US 8,941,598 B2
• Filed: 01/07/2011
• Issued: 01/27/2015
• 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
• Primary Examiner(s): XAVIER, ANTONIO J
• Application Number:
  US12/986,185
• Publication Number:
  US 20120113045A1
• Time in Patent Office: 1,481 Days
• Field of Search: None
• US Class Current: 345/173
• 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, wherein the display panel comprises a plurality of display scan lines and a plurality of data lines, and the touch panel comprises a plurality of touch scan lines and a plurality of sensing lines, and the driving method comprising:

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

sequentially sending M driving signals to the touch scan lines to drive the sensing lines of 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

the sensing period of the m^th driving signal overlaps with the synchronizd 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 the sensing signals,

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,

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,

wherein in the step of synchronizing the m^th driving signal with the i^th scan signal, m=1 and i=I.

2. A touch controller, adapted to a touch display apparatus, the touch display apparatus comprising a display panel, a display controller and a touch panel, wherein the display panel comprises a plurality of display scan lines and a plurality of data lines, and the touch panel comprises a plurality of touch scan lines and a plurality of sensing lines, the display controller sequentially sends I scan signals to the display scan lines to drive the data lines of the display panel to receive a plurality of data signals, and the touch controller comprising:

a driving unit coupled to the display panel and the touch panel, sequentially sending M driving signals to the touch scan lines to drive the sensing lines of 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, and delaying the touch panel by a predetermined time period within each pulse width of the M driving signals for generating the sensing signals, wherein 1≦

i≦

I and 1≦

m≦

M,

wherein the sensing period of the m^th driving signal overlaps with the synchronizd i^th scan signal,

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,

wherein the touch controller synchronizes a rising edge of the m^th driving signal with a rising edge of the i^th scan signal,

wherein m=1, i=I and M<

I.

3. The touch controller as claimed in claim 2, wherein the display scan lines and the touch scan lines are arranged along a first direction.

4. The touch controller as claimed in claim 2, wherein the display scan lines are arranged along a first direction, and the touch scan lines are arranged along a second direction.

5. The touch controller as claimed in claim 2, wherein the touch panel is a capacitive touch panel.