CN-122018729-A - Touch panel, touch panel driving method and display device

Abstract

The invention discloses a touch panel, a touch panel driving method and a display device, the touch panel comprises a substrate, an electromagnetic touch module comprises a first electromagnetic signal wire, a second electromagnetic signal wire and a plurality of electromagnetic coils which are arranged at intervals along the row direction and the column direction, the electromagnetic coils are arranged on the same layer, each electromagnetic coil is of an annular structure with an opening, each electromagnetic coil comprises a first end and a second end which correspond to the opening, the first electromagnetic signal wire is electrically connected with the first end of each electromagnetic coil located in the same row, the second electromagnetic signal wire is electrically connected with the second end of each electromagnetic coil located in the same column, the first electromagnetic signal wire and the second electromagnetic signal wire are mutually insulated, and the first electromagnetic signal wire and the second electromagnetic signal wire are respectively electrically connected with an electromagnetic touch chip. The size of the single electromagnetic coil is smaller, the corresponding touch position is identified more accurately, the single electromagnetic coil is convenient to integrate in the touch panel, the whole thickness of the touch panel is reduced, and the service performance of the touch panel is improved.

Inventors

• Shuai Shuiqin
• CAI YU

Assignees

• 武汉天马微电子有限公司

Dates

Publication Date

20260512

Application Date

20260128

Claims (13)

1. 1. A touch panel, comprising; A substrate; the electromagnetic touch control module is arranged on one side of the substrate and comprises a first electromagnetic signal wire, a second electromagnetic signal wire and a plurality of electromagnetic coils which are arranged at intervals along the row direction and the column direction; The electromagnetic coils are arranged on the same layer, the electromagnetic coils are of an annular structure with openings, the electromagnetic coils comprise a first end and a second end which correspond to the openings, the first electromagnetic signal wire is electrically connected with the first end of each electromagnetic coil positioned on the same row, the second electromagnetic signal wire is electrically connected with the second end of each electromagnetic coil positioned on the same column, and the first electromagnetic signal wire and the second electromagnetic signal wire are mutually insulated; the electromagnetic touch chip is arranged on one side of the substrate, and the first electromagnetic signal wire and the second electromagnetic signal wire are respectively and electrically connected with the electromagnetic touch chip.
2. 2. The touch panel of claim 1, wherein the opening of the electromagnetic coil is disposed on a side of the electromagnetic coil facing the electromagnetic touch chip.
3. 3. The touch panel according to claim 1, wherein a first conductive layer, a first insulating layer, and a second conductive layer are sequentially provided in a direction away from the substrate; The first electromagnetic signal line, the second electromagnetic signal line and the electromagnetic coil are at least partially arranged in the same layer.
4. 4. The touch panel according to claim 3, wherein the first electromagnetic signal line, the second electromagnetic signal line, and the electromagnetic coil are all provided on the first conductive layer; The first electromagnetic signal wires correspondingly connected with different electromagnetic coils along the row direction are connected through a first bridge crossing part arranged on the second conductive layer, and the orthographic projection of the first bridge crossing part on the substrate and the orthographic projection of the second electromagnetic signal wires on the substrate are at least partially overlapped; Or, the first electromagnetic signal lines correspondingly connected with different electromagnetic coils along the column direction are connected through a second bridge crossing part arranged on the second conductive layer, and the orthographic projection of the second bridge crossing part on the substrate and the orthographic projection of the first electromagnetic signal lines on the substrate are at least partially overlapped.
5. 5. The touch panel of claim 4, further comprising a touch layer at least partially disposed on the second conductive layer, the touch layer comprising a touch electrode block, wherein neither an orthographic projection of the touch electrode block on the substrate nor an orthographic projection of the first bridge span portion, the second bridge span portion on the substrate overlap.
6. 6. The touch panel according to claim 1, wherein a first conductive layer, a first insulating layer, a second conductive layer, a second insulating layer, and a third conductive layer are sequentially provided in a direction away from the substrate; the first electromagnetic signal wire, the second electromagnetic signal wire and the electromagnetic coil are arranged on at least one layer of the first conductive layer and the second conductive layer; The touch panel further comprises a touch layer, and the touch layer is at least partially arranged on the third conductive layer.
7. 7. The touch panel according to claim 6, wherein the first electromagnetic signal line and the second electromagnetic signal line are provided in the first conductive layer, and the electromagnetic coil is provided in the second conductive layer; The first electromagnetic signal wires correspondingly connected with different electromagnetic coils along the row direction are connected through a first bridge crossing part arranged on the second conductive layer, and the orthographic projection of the first bridge crossing part on the substrate and the orthographic projection of the second electromagnetic signal wires on the substrate are at least partially overlapped; Or, the first electromagnetic signal lines correspondingly connected with different electromagnetic coils along the column direction are connected through a second bridge crossing part arranged on the second conductive layer, and the orthographic projection of the second bridge crossing part on the substrate and the orthographic projection of the first electromagnetic signal lines on the substrate are at least partially overlapped.
8. 8. The touch panel of claim 6, wherein the first electromagnetic signal line comprises first and second connected portions, the second electromagnetic signal line comprises third and fourth connected portions, and the electromagnetic coil comprises first and second connected sub-portions; The first part, the third part and the first sub-part are all arranged on the first conductive layer, and the second part, the fourth part and the second sub-part are all arranged on the second conductive layer; The front projection of the first portion on the substrate and the front projection of the second portion on the substrate at least partially overlap, the front projection of the third portion on the substrate and the front projection of the fourth portion on the substrate at least partially overlap, and the front projection of the first sub-portion on the substrate and the front projection of the second sub-portion on the substrate at least partially overlap.
9. 9. The touch panel according to claim 8, wherein the first electromagnetic signal lines correspondingly connected to the different electromagnetic coils in the row direction are connected by a first bridge portion provided in the third conductive layer, and an orthographic projection of the first bridge portion on the substrate and an orthographic projection of the second electromagnetic signal line on the substrate at least partially overlap; Or, the first electromagnetic signal lines correspondingly connected with different electromagnetic coils along the column direction are connected through a second bridge crossing part arranged on the second conductive layer, and the orthographic projection of the second bridge crossing part on the substrate and the orthographic projection of the first electromagnetic signal lines on the substrate are at least partially overlapped.
10. 10. The touch panel of claim 5 or 9, wherein the touch layer further comprises a virtual electrode block; The orthographic projection of the virtual electrode block on the substrate and the orthographic projections of the first bridge span part and the second bridge span part on the substrate are not overlapped.
11. 11. The touch panel driving method is characterized by comprising the following steps of; The electromagnetic touch control module comprises a driving state and an induction state, wherein in the driving state, a high-potential driving signal is transmitted to one of the first electromagnetic signal wire and the second electromagnetic signal wire through an electromagnetic touch control chip of the touch control panel, and the other one is connected with a low-potential signal; in the induction state, the first electromagnetic signal line and the second electromagnetic signal line receive induction signals in a time-sharing mode, and one of the first electromagnetic signal line and the second electromagnetic signal line, which does not receive the induction signals, is connected with a low-potential signal.
12. 12. The method according to claim 11, wherein in the sensing state, the first electromagnetic signal line and the second electromagnetic signal line receive sensing signals in a time-sharing manner, and one of the first electromagnetic signal line and the second electromagnetic signal line that does not receive the sensing signals is connected to a low potential signal: The electromagnetic touch chip receives the induction signals of the first electromagnetic signal lines row by row, or receives the induction signals of the second electromagnetic signal lines row by row.
13. 13. A display device comprising the touch panel according to any one of claims 1 to 10.

Description

Touch panel, touch panel driving method and display device Technical Field The invention belongs to the technical field of electronic products, and particularly relates to a touch panel, a touch panel driving method and a display device. Background Along with the progress of technology, digital touch panels such as smart phones and tablet computers are widely used, wherein a display screen is an indispensable interpersonal communication interface in the touch panels. Such as an Organic LIGHT EMITTING Diode (OLED) touch panel, has the advantages of self-luminescence, energy saving, consumption reduction, flexibility and the like. At present, the general mode of providing the display panel with the electromagnetic touch function is realized by additionally arranging an electromagnetic coil layer in or outside the display panel, but the electromagnetic coil layer can cause the technical defects of larger overall thickness and complicated production process of the display panel. The use performance of the touch panel cannot meet the requirements due to the structural limitation of the conventional touch panel. Therefore, a new touch panel, a touch panel driving method and a display device are needed. Disclosure of Invention The embodiment of the invention provides a touch panel, a touch panel driving method and a display device, wherein the size of a single electromagnetic coil is relatively smaller, the corresponding touch position is identified more accurately, the touch panel is convenient to integrate in the touch panel, the whole thickness of the touch panel is reduced, and the service performance of the touch panel is improved. The embodiment of the invention provides a touch panel, which comprises a substrate, an electromagnetic touch module, an electromagnetic touch chip and an electromagnetic touch chip, wherein the electromagnetic touch module is arranged on one side of the substrate and comprises a first electromagnetic signal wire, a second electromagnetic signal wire and a plurality of electromagnetic coils which are arranged at intervals along the row direction and the column direction, the electromagnetic coils are arranged on the same layer and are of an annular structure with openings, the electromagnetic coils comprise a first end and a second end which correspond to the openings, the first electromagnetic signal wire is electrically connected with the first end of each electromagnetic coil positioned on the same row, the second electromagnetic signal wire is electrically connected with the second end of each electromagnetic coil positioned on the same column, the first electromagnetic signal wire and the second electromagnetic signal wire are mutually insulated, and the electromagnetic touch chip is arranged on one side of the substrate and is electrically connected with the electromagnetic touch chip. In a second aspect, an embodiment of the invention provides a touch panel driving method, which comprises a driving state and an induction state, wherein in the driving state, a high-potential driving signal is transmitted to one of a first electromagnetic signal wire and a second electromagnetic signal wire through an electromagnetic touch chip of a touch panel, the other one of the first electromagnetic signal wire and the second electromagnetic signal wire is connected with a low-potential signal, in the induction state, the first electromagnetic signal wire and the second electromagnetic signal wire receive the induction signal in a time-sharing manner, and one of the first electromagnetic signal wire and the second electromagnetic signal wire, which does not receive the induction signal, is connected with the low-potential signal. In a third aspect, an embodiment of the present invention provides a display device including the touch panel in any one of the above embodiments. Compared with the related art, the touch panel provided by the embodiment of the invention comprises a substrate, an electromagnetic touch module and an electromagnetic touch chip, in the embodiment, the electromagnetic coils of the electromagnetic touch module are arranged in an array, a first electromagnetic signal wire is electrically connected with a first end of each electromagnetic coil positioned in the same row, a second electromagnetic signal wire is electrically connected with a second end of each electromagnetic coil positioned in the same column, so that time-sharing driving and induction of the electromagnetic coils in the row direction and the column direction are realized, the touch position is further determined, the electromagnetic touch chip can be used for sending electromagnetic coils or receiving electromagnetic signals, and the corresponding touch position identification is more accurate due to the fact that the size of a single electromagnetic coil is smaller, and the touch panel is convenient to integrate in the touch panel, so that the whole thickness of the touch panel is reduced, and the use