JP6290271B2 - In-cell touch display panel - Google Patents

Description

  The present invention relates to an in-cell touch display panel, and more particularly to an in-cell touch display panel that can improve voltage uniformity in a display stage of touch drive electrodes.

  With the development of production technology of electronic products, for example, most portable devices such as smartphones and tablet PCs all have a touch operation function, and the use with the user's portable device becomes more convenient. Conventionally, touch panel technologies used for display devices that have been developed include cover glass integration technology (OGS), on-cell touch panel technology (on-cell touch), in-cell touch panel technology (in-cell touch), and the like. Including. In these touch panel technologies, the in-cell touch panel technology has an advantage of reducing the thickness of the display panel because the touch electrode is manufactured in the liquid crystal pixel layer of the display panel. However, in the in-cell touch display panel, the screen display and the touch detection need to be performed under different periods, and the display stage time is limited, which may lead to a voltage mismatch between the pixels.

  An object of the present invention is to provide an in-cell touch display panel characterized in that voltage uniformity in a display stage of touch drive electrodes can be improved by installing connection wires in a peripheral region. Further, since the connection wires installed in the peripheral area may be formed by the same process as the circuit elements in the display area, the overall process steps of the in-cell touch display panel do not increase.

  One embodiment of the present invention provides an in-cell touch display panel including a plurality of touch drive electrodes and a plurality of touch detection electrodes. These touch drive electrodes and these touch detection electrodes are located in the display area of the in-cell touch display panel and are installed so as to intersect with each other. These touch drive electrodes are divided into a plurality of touch drive electrode groups, each of the plurality of touch drive electrode groups includes at least two touch drive electrodes, and the touch drive electrodes in each of the plurality of touch drive electrode groups Are electrically connected to each other.

  In one or a plurality of embodiments, these touch drive electrodes in each of the plurality of touch drive electrode groups are electrically connected to each other by connection wires in a peripheral region located outside the display region.

  In one or a plurality of embodiments, the touch drive electrodes of each of the plurality of touch drive electrode groups are symmetrically arranged on both sides of the virtual central axis of the display area.

  In one or a plurality of embodiments, the in-cell touch display panel further includes a plurality of touch drive electrode leads coupled to a plurality of touch drive electrodes and extending to a peripheral region, and a plurality of touch drives. These touch drive electrode leads corresponding to the touch drive electrodes in each of the electrode groups are coupled to the connection wires.

  Another aspect of the present invention is to provide an in-cell touch display panel including a plurality of touch drive electrodes and a plurality of touch detection electrodes. These touch drive electrodes and these touch detection electrodes are positioned and crossed in the display area of the in-cell touch display panel. Both ends of each of the plurality of touch drive electrodes are electrically connected to each other via the connection wire by being coupled to the connection wire.

  In one or more embodiments, the in-cell touch display panel further includes a plurality of touch drive electrode leads coupled to the touch drive electrodes, respectively, and each of the plurality of touch drive electrode leads corresponds to the touch. Touch drive electrode leads extending from both ends of the drive electrode to the peripheral region and corresponding to the plurality of touch drive electrodes are coupled to the connection wires.

  Another aspect of the present invention is to provide an in-cell touch display panel including a plurality of touch drive electrodes and a plurality of touch detection electrodes. The touch drive electrode and the touch detection electrode are located in the display area of the in-cell touch display panel and are installed so as to intersect with each other. Both ends of the plurality of touch drive electrodes are electrically connected to each other via the first connection wire by being coupled to the first connection wire. The touch drive electrodes are divided into a plurality of touch drive electrode groups, each of the plurality of touch drive electrode groups includes at least two touch drive electrodes, and the touch drive electrodes in each of the plurality of touch drive electrode groups are mutually connected. Electrically connected.

  In one or a plurality of embodiments, these touch drive electrodes in each of the plurality of touch drive electrode groups are electrically connected to each other by connection wires in a peripheral region located outside the display region.

  In one or a plurality of embodiments, each touch drive electrode of the plurality of touch drive electrode groups is symmetrically arranged on both sides of the virtual central axis of the display area.

  In one or more embodiments, the in-cell touch display panel further includes a plurality of touch drive electrode leads coupled to the touch drive electrodes, respectively. Each of the plurality of touch drive electrode leads extends to the peripheral region, and a touch drive electrode lead corresponding to each of the plurality of touch drive electrodes is coupled to the connection wire.

  The in-cell touch display panel according to the present invention is characterized in that the voltage uniformity in the display stage of the touch drive electrode can be improved by connecting wires in the peripheral region. Further, since the connection wires installed in the peripheral area may be formed by the same process as the circuit elements in the display area, the overall process steps of the in-cell touch display panel do not increase.

  Further, in the in-cell touch display panel according to the present invention, the touch drive electrodes in the same touch drive electrode group are electrically connected to each other by a connection wire installed in the peripheral region, but additional elements or Since there is no circuit, the entire process and light transmittance of the display area are not affected.

  The following brief description made with reference to the accompanying drawings is intended to make the embodiments and their merits more understandable.

1 is a schematic diagram illustrating an in-cell touch display panel according to some embodiments of the present invention. 1 is a schematic diagram illustrating an in-cell touch display panel according to some embodiments of the present invention. 1 is a schematic diagram illustrating an in-cell touch display panel according to some embodiments of the present invention.

  The following examples illustrate the outline of the present invention, but these examples are not intended to limit the invention to any particular environment, application, or special embodiment described in these examples. . Accordingly, the descriptions of these examples are for the purpose of illustrating the invention only and are not intended to limit the invention. In the following examples and drawings, elements that are not directly related to the present invention are omitted without being shown, and the dimensional relationship between the elements in the drawings is not intended to limit the actual ratio, but to facilitate understanding. Only things.

  In this text, terms such as “first” and “second” are used to describe various elements, components, regions, layers and / or parts. It should be understood that the layers and / or portions are not limiting. These terms are only for distinguishing elements, components, regions, layers and / or parts from elements, components, regions, layers and / or parts.

  FIG. 1 is a schematic diagram illustrating an in-cell touch display panel 100 according to some embodiments of the present invention. The in-cell touch display panel 100 includes a display area AA and a peripheral area PA that is located outside the display area AA and surrounds the display area AA. The display area AA includes touch drive electrodes TX (1) to TX (8) and touch detection electrodes RX (1) to RX (10). The touch drive electrodes TX (1) to TX (8) The touch detection electrodes RX (1) to RX (10) are arranged perpendicular to each other. The touch drive electrodes TX (1) to TX (8) and the touch detection electrodes RX (1) to RX (10) may be, for example, indium tin oxide (ITO) or indium zinc oxide (IZO). ) Or the like, but is not limited thereto. The peripheral area PA has a drive circuit D, transmits a detection signal to the touch drive electrodes TX (1) to TX (8), and touches to detect the touch detection electrodes RX (1) to RX (10). The drive electrodes TX (1) to TX (8) and the touch detection electrodes RX (1) to RX (10) are electrically connected. When the in-cell touch display panel 100 is operated using an object (for example, a human finger, a touch pen), the touch drive electrodes TX (1) to TX (8) and the touch detection electrodes RX (1) to RX ( The electric capacity between 10) changes. The drive circuit D detects the capacitance between the touch drive electrodes TX (1) to TX (8) and the touch detection electrodes RX (1) to RX (10), so that the object in the in-cell touch display panel 100 is detected. The position can be determined.

  In an embodiment, in addition to the touch drive function, the drive circuit D drives each of a plurality of pixels (not shown) in the display area AA to display a shadow image corresponding to the display area AA. Provide further. Each of the plurality of pixels in the display area AA has a common electrode (not shown). In some embodiments, some of these common electrodes constitute touch drive electrodes TX (1) -TX (8), while another part of these common electrodes is comprised of touch sensing electrodes RX (1)- RX (10) is configured. In the in-cell touch display panel 100, each of a plurality of frames may be divided into a display stage and a touch detection stage. In the display stage, the driving circuit D provides a pixel voltage and a common voltage to each pixel electrode (not shown) and the common electrode of the plurality of pixels so as to display a corresponding screen in the display area AA. In the touch detection stage, the drive circuit D provides detection signals to the touch drive electrodes TX (1) to TX (8) and detects the touch detection electrodes RX (1) to RX (10). Since how to operate the drive circuit D in the display stage and the touch detection stage is not the focus of the present invention, it will not be described here.

  As shown in FIG. 1, the virtual center line C divides the in-cell touch display panel 100 into two symmetric areas, and one area includes the touch drive electrodes TX (1) to TX (4) and touch detection. Electrodes RX (1) to RX (5), and another region includes touch drive electrodes TX (5) to TX (8) and touch detection electrodes RX (6) to RX (10). The two touch drive electrodes arranged symmetrically in the two regions constitute a touch drive electrode group and are electrically connected to each other. That is, the touch drive electrode TX (1) and the touch drive electrode TX (8) constitute a touch drive electrode group P1, and the touch drive electrode TX (1) and the touch drive electrode TX (8) are electrically Connected. The touch drive electrode TX (2) and the touch drive electrode TX (7) constitute a touch drive electrode group P2, and the touch drive electrode TX (2) and the touch drive electrode TX (7) are electrically connected. The The touch drive electrode TX (3) and the touch drive electrode TX (6) constitute a touch drive electrode group P3, and the touch drive electrode TX (3) and the touch drive electrode TX (6) are electrically connected. The The touch drive electrode TX (4) and the touch drive electrode TX (5) constitute a touch drive electrode group P4, and the touch drive electrode TX (4) and the touch drive electrode TX (5) are electrically connected. The

  In one embodiment, as shown in FIG. 1, each of the touch drive electrodes TX (1) -TX (8) has a corresponding touch drive electrode lead L (1) -L (8). Touch drive electrode leads L (1) to L (8) are respectively coupled to the touch drive electrodes TX (1) to TX (8) and extend to the peripheral area PA. In the peripheral area PA, touch drive electrode leads corresponding to all touch drive electrodes included in the same touch drive electrode group are coupled to the same connection wire. As shown in FIG. 1, the peripheral area PA has four connection wires W1 (1) to W1 (4), and the touch drive electrode leads L (1) and L (8) are the connection wires W1 (1). Touch drive electrode leads L (2) and L (7) are coupled to connection wire W1 (2), and touch drive electrode leads L (3) and L (6) are coupled to connection wire W1 (3). The touch drive electrode leads L (4) and L (5) are coupled to the connection wire W1 (4).

  In the in-cell type touch display panel 100, the touch drive electrode leads L (1) to L (8) and the connection wires W1 (1) to W1 (4) may be made of a conductive material. The circuit elements (not shown) in AA are the same, and the touch drive electrode leads L (1) to L (8) and the connection wires W1 (1) to W1 (4) are circuit elements in the display area AA ( It may be formed by the same process as that (not shown). In some embodiments, the touch drive electrode leads L (1) to L (8) and the connection wires W1 (1) to W1 (4) may be in direct contact. As an example, the touch drive electrode leads L (1) and L (8) may be in direct contact with the connection wire W1 (1) through vias (Via).

  In the embodiment of FIG. 1, all the touch drive electrodes included in the same touch drive electrode group are electrically connected by connection wires installed in the peripheral area PA. In this way, all the touch drive electrodes included in the same touch drive electrode group can provide the same voltage value in the display stage, which contributes to voltage equalization in the display stage of the touch drive electrodes. Further, the touch drive electrodes included in the same touch drive electrode group are electrically connected to each other by connection wires installed in the peripheral area PA, but do not have additional elements or circuits in the display area AA. It does not affect the overall process and light transmittance of the display area. In addition, since the connection wires installed in the peripheral area PA may be formed by the same process as a circuit element (not shown) in the display area AA, the overall process steps of the in-cell touch display panel 100 do not increase. .

  It should be noted that the number of connection wires shown in FIG. 1 and the connection relationship between the connection wires and the touch drive electrode leads L (1) to L (8) are not intended to limit the scope of the present invention. Only for the purpose. For example, in another embodiment, two connection wires may be installed in the peripheral region of the in-cell type touch display panel 100, and one connection wire is a touch drive electrode lead L (1), L (2), L Coupled to (7) and L (8), another connection wire is coupled to the touch drive electrode leads L (3) -L (6). Accordingly, all modifications conceivable according to the disclosure of the present invention belong to the scope of the present invention.

  FIG. 2 is a schematic diagram illustrating an in-cell touch display panel according to some embodiments of the present invention. The in-cell touch display panel 200 includes a display area AA and a peripheral area PA that is located outside the display area AA and surrounds the display area AA. The display area includes touch drive electrodes TX (1) to TX (8) and touch detection electrodes RX (1) to RX (10), and touches the touch drive electrodes TX (1) to TX (8). The detection electrodes RX (1) to RX (10) are arranged perpendicular to each other. The peripheral area PA has a drive circuit D, transmits a detection signal to the touch drive electrodes TX (1) to TX (8), and touches to detect the touch detection electrodes RX (1) to RX (10). The drive electrodes TX (1) to TX (8) and the touch detection electrodes RX (1) to RX (10) are electrically connected. Since the arrangements of the touch drive electrodes TX (1) to TX (8), the touch detection electrodes RX (1) to RX (10) and the drive circuit D in FIG. 2 are all the same as those in FIG. Reference is not made here.

  In an embodiment, in addition to the touch drive function, the drive circuit D has a pixel drive function for driving each of a plurality of pixels (not shown) in the display area AA to display a shadow image corresponding to the display area AA. Further provide. Each of the plurality of pixels in the display area AA has a common electrode (not shown). In some embodiments, some of these common electrodes constitute touch drive electrodes TX (1) -TX (8), while another part of these common electrodes is comprised of touch sensing electrodes RX (1)- RX (10) is configured.

  As shown in FIG. 2, each of the touch drive electrodes TX (1) to TX (8) has a corresponding touch drive electrode lead L (1) to L (8). Touch drive electrode leads L (1) to L (8) are respectively coupled to touch drive electrodes TX (1) to TX (8), and touch drive electrode leads L (1) to L (8) are touch driven. The electrodes TX (1) to TX (8) extend from both ends to the peripheral area PA, and one ends of the touch drive electrode leads L (1) to L (8) are coupled to the drive circuit D. In the peripheral area PA, both ends of the same touch drive electrode are coupled to the same connection wire. As shown in FIG. 2, the peripheral area PA has eight connection wires W2 (1) to W2 (8), and is coupled to both ends of the corresponding touch drive electrode leads L (1) to L (8), respectively. Is done. That is, the connection wire W2 (i) is coupled to both ends of the touch drive electrode lead L (i).

  In one embodiment, as shown in FIG. 2, the virtual center line C divides the in-cell touch display panel 200 into two symmetric regions, and one region has connection wires W2 (1) to W2 (4). And another region includes connection wires W2 (5) -W2 (8). In FIG. 2, the connection wire W2 (1) and the connection wire W2 (8) are line symmetric, the connection wire W2 (2) and the connection wire W2 (7) are line symmetric, and the connection wire W2 (3 ) And the connection wire W2 (6) are line symmetric, and the connection wire W2 (4) and the connection wire W2 (5) are line symmetric. In another embodiment, the connection wires W2 (1) to W2 (8) may be located on the same side of the in-cell touch display panel 200.

  In the in-cell type touch display panel 200, the touch drive electrode leads L (1) to L (8) and the connection wires W2 (1) to W2 (8) may be made of a conductive material. The circuit elements (not shown) in AA are the same, and the touch drive electrode leads L (1) to L (8) and the connection wires W1 (1) to W2 (8) are circuit elements in the display area AA ( It may be formed by the same process as that (not shown). In some embodiments, the touch drive electrode leads L (1) to L (8) and the connection wires W2 (1) to W2 (8) may be in direct contact. As an example, both ends of the touch drive electrode lead L (1) may be in direct contact with the connection wire W2 (1) through vias.

  In the embodiment of FIG. 2, the connection wires installed in the peripheral area PA provide separate electrical connection paths at both ends of each of the plurality of touch drive electrodes, and the touch drive electrodes are driven on the side away from the drive circuit D. The impedance to the circuit D can be reduced. In this manner, all the common electrodes included in the same touch drive electrode can easily achieve the target voltage value in the display stage and can provide the same voltage value in the display stage. Contributes to voltage equalization at the display stage. In addition, both ends of each of the plurality of touch drive electrodes are electrically connected to each other by a connection wire installed in the peripheral area PA. However, since the display area AA does not have an additional element or circuit, the display area It does not affect the overall process and light transmittance. Note that since the connection wires installed in the peripheral area PA may be formed by the same process as a circuit element (not shown) in the display area AA, the overall process steps of the in-cell touch display panel 200 do not increase. .

  In an embodiment, the in-cell touch display panel may have the connection wires W1 (1) to W1 (4) shown in FIG. 1 and the connection wires W2 (1) to W2 (8) shown in FIG. Good. Please refer to FIG. FIG. 3 is a schematic diagram illustrating an in-cell touch display panel according to some embodiments of the present invention. Compared with the in-cell type touch display panel 100 of FIG. 1, the in-cell type touch display panel 300 of FIG. 3 further includes connection wires W2 (1) to W2 (8) shown in FIG. The arrangements relating to the touch drive electrodes TX (1) to TX (8), the touch detection electrodes RX (1) to RX (10), the drive circuit D, and the connection wires W1 (1) to W1 (4) in FIG. 1 is the same. Moreover, since the arrangement | positioning regarding connection wire W2 (1) -W2 (8) is the same as FIG. 2, related description refers to the previous paragraph and is not demonstrated here. In some embodiments, the connection wires W1 (1), W2 (1) and W2 (8) may form the same connection wire, and the connection wires W1 (2), W2 (2) and W2 (7). May form the same connection wire, and the connection wires W1 (3), W2 (3) and W2 (6) may form the same connection wire, and the connection wire W1 (4), W2 (4) and W2 (5) may form the same connection wire.

  In the in-cell touch display panel 300, the touch drive electrode leads L (1) to L (8), the connection wires W1 (1) to W1 (4), and the connection wires W2 (1) to W2 (8) are made of a conductive material. The conductive material and the circuit element (not shown) in the display area AA are the same, and the touch drive electrode leads L (1) to L (8) and the connection wires W1 (1) to W1 (4) and the connection wires W2 (1) to W2 (8) may be formed by the same process as a circuit element (not shown) in the display area AA. In one embodiment, the touch drive electrode leads L (1) to L (8), the connection wires W1 (1) to W1 (4), and the connection wires W2 (1) to W2 (8) are in direct contact ( direct contact). As an example, the touch drive electrode leads L (1) and L (8) may be in direct contact with the connection wire W1 (1) via vias, and both ends of the touch drive electrode lead L (1) are vias. May be in direct contact with the connection wire W2 (1).

  In order to facilitate explanation of the technical features of the present invention, it should be understood that only eight touch drive electrodes and ten touch sensing electrodes are illustrated in the drawings. Actually, the in-cell touch display panel may be designed according to various requirements (for example, dimensions, resolution, light transmittance, etc.) without being limited to the above embodiment.

  Although the present invention has been disclosed in the embodiments as described above, this is not intended to limit the present invention, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on what is specified in the following appended claims.

100, 200, 300 In-cell touch display panel AA Display area C Virtual central axis D Drive circuits L (1) to L (8) Touch drive electrode leads P1 to P4 Touch drive electrode group PA Peripheral areas RX (1) to RX ( 10) Touch detection electrodes TX (1) to TX (8) Touch drive electrodes W1 (1) to W1 (4), W2 (1) to W2 (10) Connection wires

Claims (2)

A plurality of touch drive electrodes;
A plurality of touch sensing electrodes;
With
The plurality of touch drive electrodes and the plurality of touch detection electrodes are disposed to intersect each other in a display area of an in-cell touch display panel,
Both ends of each of the plurality of touch drive electrodes are electrically connected to each other via the first connection wire by being coupled to a first connection wire, respectively.
The plurality of touch drive electrodes are divided into a plurality of touch drive electrode groups, and each of the plurality of touch drive electrode groups includes at least two of the plurality of touch drive electrodes;
An in-cell touch display panel in which the plurality of touch drive electrodes in each of the plurality of touch drive electrode groups are electrically connected to each other by a second connection wire in a peripheral region located outside the display region. A plurality of touch drive electrode leads coupled to each of the plurality of touch drive electrodes and extending to the peripheral region;
The in-cell touch display panel according to claim 1 , wherein the plurality of touch drive electrode leads corresponding to the plurality of touch drive electrodes of each of the plurality of touch drive electrode groups are coupled to the second connection wire.

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