Touch controller for touch-sensing display apparatus and driving method thereof
AssigneeNovatek Microelectronics Corp.
InventorChih-Chang Lai
Life of this patent
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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 mth driving signal is synchronized with the ith 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.
Claims5
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 mth driving signal with an ith scan signal, wherein 1≦i≦I and 1≦m≦M;
- and the sensing period of the mth driving signal overlaps with the synchronizd ith 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 mth driving signal with the ith scan signal, a rising edge of the mth driving signal is synchronized with a rising edge of the ith scan signal,
- wherein in the step of synchronizing the mth driving signal with the ith scan signal, m=1 and i=I.
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 mth driving signal with an ith 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 mth driving signal overlaps with the synchronizd ith 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 mth driving signal with a rising edge of the ith scan signal,
- wherein m=1, i=I and M<I.
Dependencies are inferred from the claim text.