Display device, touch display panel, and driving method therefor

Patent metadata

Field	Value
Publication number	US-12554366-B2
Application number	US-202218289991-A
Country	US
Kind code	B2
Filing date	Apr 26, 2022
Priority date	Apr 26, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The touch display panel includes a display area and a peripheral area located outside the display area. Part of the peripheral area protrudes in a direction away from the display area to form a lead-out area. The lead-out area has a bonding part. The touch display panel includes a display substrate, a touch layer, and switching circuits. The touch layer is provided on a side of the display substrate, and includes at least two touch islands arranged in an array. There is a gap between two adjacent touch islands. Each touch island includes at least two touch electrodes. The touch electrodes include at least two sensing electrodes for outputting sensing signals. The switching circuits are at least partially provided in the peripheral area. A touch island is connected to the bonding part through a switching circuit.

First claim

The invention claimed is:

1 . A touch display panel, comprising a display area and a peripheral area located outside the display area, wherein part of the peripheral area protrudes in a direction away from the display area to form at least one lead-out area, and the lead-out area has a bonding part,
the touch display panel comprises: a display substrate; a touch layer, provided on a side of the display substrate and comprising at least two touch islands arranged in an array, wherein there is a gap between two adjacent touch islands, each touch island comprises at least two touch electrodes, and the touch electrodes comprise at least two sensing electrodes for outputting sensing signals; and switching circuits, at least partially provided in the peripheral area, wherein one of the touch islands is connected to the bonding part through one of the switching circuits, and the switching circuits are at least used for switching on or off the sensing electrodes and the bonding part, wherein in one of the touch islands, the touch electrodes comprise at least two first touch electrodes, wherein the first touch electrodes extend in a column direction and are arranged at intervals along a row direction; one of the first touch electrodes comprises at least two first electrode blocks arranged at intervals along the column direction and transfer bridges connecting two adjacent first electrode blocks; and the gap cuts off part of a first electrode block and extends along a curved or polyline trajectory, wherein in the one of the touch islands; the touch electrodes further comprise at least two second touch electrodes, the second touch electrodes extend along the row direction and are arranged at intervals along the column direction, and any of the first touch electrodes intersects with, but is insulated from, each of the second touch electrodes; and each of the first touch electrodes is a driving electrode for receiving a driving signal, and each of the second touch electrodes is one of the sensing electrodes, wherein one of the second touch electrodes comprises at least two second electrode blocks connected in series along the row direction; one of the transfer bridges intersects with one of the second touch electrodes; and the touch layer comprises: a transfer layer, provided on a side of the display substrate and comprising the transfer bridges; an isolation layer covering the transfer layer; and an electrode layer, provided on a surface of the isolation layer away from the display substrate, and comprising the first electrode block and a second electrode block.

2 . The touch display panel according to claim 1 , wherein
each of the switching circuits comprises at least two touch leads and a switching element, any of the touch electrodes being bonded to the bonding part through one of the touch leads; and one of the touch leads connected to one of the sensing electrodes is provided with the switching element, the switching element being used for switching on or off one of the touch leads connected to the switching element in response to a control signal.

3 . The touch display panel according to claim 2 , wherein
the switching element is a switching transistor, a first terminal and a second terminal of the switching transistor being connected to one of the touch leads, and a gate of the switching transistor being used for receiving the control signal.

4 . The touch display panel according to claim 3 , wherein
each of the switching circuits further comprises a switching scan line; and in each of the switching circuits, the switching scan line is connected in series with the gate of the switching transistor, and is further connected with the bonding part, for transmitting the control signal.

5 . The touch display panel according to claim 4 , wherein the touch display panel comprises:
a switching active layer, provided in the display substrate, and comprising a channel region and the first terminal and the second terminal on both sides of the channel region; a first insulation layer covering the active layer; a switching gate, provided on a surface of the first insulation layer away from the switching active layer and overlapping with the switching active layer to form the switching transistor, the switching gate being connected with the switching scan line; and a second insulation layer covering the switching gate, wherein the touch lead is located on a side of the second insulation layer away from the switching active layer, and comprises two lead segments arranged at intervals along the column direction, wherein one of the lead segments is connected to the touch electrode and the first terminal, and the other of the lead segments is connected to the second terminal and the bonding part.

6 . The touch display panel according to claim 5 , wherein
the switching active layer extends along the row direction, and the first terminal and the second terminal are arranged on both sides of the channel region along the column direction, and the second terminal is located between the channel region and the bonding part; and the switching scan line and the switching gate form an integral structure, extend along the row direction, and overlap with the channel region of the switching active layer.

7 . The touch display panel according to claim 6 , wherein the touch display panel further comprises:
a first conductive layer, provided on a surface of the second insulation layer away from the switching active layer, and comprises a first conductive part and a second conductive part arranged at intervals along the column direction, wherein the first conductive part overlaps and is connected through a first contact hole with the first terminal, and the second conductive part overlaps and is connected through a second contact hole with the second terminal; a third insulation layer covering the first conductive layer; a second conductive layer, provided on a surface of the third insulation layer away from the switching active layer, and comprising a third conductive part and a fourth conductive part arranged at intervals along the column direction, wherein the third conductive part overlaps and is connected with the first conductive part, and the fourth conductive part overlaps and is connected with the second conductive part; and a fourth insulation layer covering the second conductive layer, wherein the touch lead is located on a side of the fourth insulation layer away from the switching active layer, the lead segment connecting the touch electrode is connected with the third conductive part, and the lead segment connecting the bonding part is connected with the fourth conductive part.

8 . The touch display panel according to claim 7 , wherein
the first conductive part comprises a first connection part and a second connection part connected along the column direction, wherein the first connection part extends along the row direction, the first connection part overlaps and is connected through the first contact hole with the first terminal, the second connection part is connected to a side of the first connection part away from the second conductive part, the second connection part extends along the column direction, and the second connection part is connected to the third conductive part; and the second conductive part comprises a third connection part and a fourth connection part connected along the column direction, the third connection part extends along the row direction, the third connection part overlaps and is connected through the second contact hole with the second terminal, the fourth connection part is connected to a side of the third connection part away from the first conductive part and extends along the column direction

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Yan Jun
• Dong Xiangdan
• Qiu Haijun
• Hu Ming
• Wei Yulong

Classifications

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title