Driving method for in-cell type touch display panel
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorJianhong Lin
Life of this patent
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Abstract
The invention provides a driving method for in-cell type touch display panel, by setting the touch scan signal (TP SCAN) turns on when n-th stage GOA unit finishing outputting a scan driver signal (G(n)) during displaying m-th frame, and during displaying (m+1)-th frame, setting the touch scan signal (TP SCAN) turns on when any stage GOA unit other than the n-th stage finishing outputting a scan driver signal (G(n)). The driving method makes the TFTs in GOA unit of each stage withstanding the voltage stress time and the ageing extent uniform to avoid any single stage ageing faster than the remaining to cause abnormal display in the known technologies.
Claims16
A driving method for in-cell type touch display panel, which comprises:
- Step 1:
- providing an in-cell type touch display panel, the in-cell type touch display panel using a GOA circuit for gate scan driving, the GOA circuit comprising a plurality of cascade GOA units, the GOA unit of each stage inputting a clock signal, an inverted clock signal, and a constant voltage, and outputting a scan driver signal to the GOA unit of corresponding stage;
- the first stage GOA unit inputting a scan activation signal;
- Step 2:
- for natural numbers m and n, during displaying an m-th frame, setting a touch scan signal to turn on when an n-th stage GOA unit finishing outputting the scan driver signal, the in-cell type touch display panel transiting from a display duration into a touch signal sensing duration;
- and
- Step 3:
- during displaying an (m+t)-th frame, setting a touch scan signal to turn on when a GOA unit of any stage other than the n-th stage finishing outputting the scan driver signal, the in-cell type touch display panel transiting from a display duration into a touch signal sensing duration.
A driving method for in-cell type touch display panel, which comprises:
- Step 1:
- providing an in-cell type touch display panel, the in-cell type touch display panel using a GOA circuit for gate scan driving, the GOA circuit comprising a plurality of cascade GOA units, the GOA unit of each stage inputting a clock signal, an inverted clock signal, and a constant voltage, and outputting a scan driver signal to the GOA unit of corresponding stage;
- the first stage GOA unit inputting a scan activation signal;
- Step 2:
- for natural numbers m and n, during displaying an m-th frame, setting a touch scan signal to turn on when an n-th stage GOA unit finishing outputting the scan driver signal, the in-cell type touch display panel transiting from a display duration into a touch signal sensing duration;
- and
- Step 3:
- during displaying an (m+t)-th frame, setting a touch scan signal to turn on when a GOA unit of any stage other than the n-th stage finishing outputting the scan driver signal, the in-cell type touch display panel transiting from a display duration into a touch signal sensing duration;
- wherein the GOA Unit of each stage comprises a plurality of N-type TFTs;
- wherein in Step 3, the touch scan signal is set to turn on when a GOA unit of any stage before the n-th stage finishing outputting the scan driver signal;
- wherein in Step 3, the touch scan signal is set to turn on when a GOA unit of the previous stage ((n−1)-th stage) before the n-th stage finishing outputting the scan driver signal.
Dependencies are inferred from the claim text.