TW202127209A - Touch panel and touch display device using same - Google Patents

Abstract

A touch panel includes: a light-transmissive and flexible substrate including a main body portion and at least one bending portion extending from an edge of the main body portion; and touch electrodes on a surface of the main body portion; and dummy electrodes on a surface of the bending portion. The touch electrodes and the dummy electrodes are both in metal grid shape formed by a plurality of metal lines crossing with each other. The disclosure also provides a touch display device using the touch panel. In the present disclosure, dummy electrodes are provided on the bending portion of the substrate; when the touch panel is attached to the display panel, even if the touch panel is misaligned or distorted, it will not cause obvious visual effects in the touch display area.

Description

Touch panel and touch display device using the same

The invention relates to a touch panel and a touch display device using the touch panel.

A conventional touch display device includes a transparent cover, a display panel, and a substrate between the transparent cover and the display panel, and touch electrodes are formed on the surface of the substrate to sense touch positions. The substrate is flexible and bendable, and its area size is larger than the size of the display panel. The substrate includes a main body laminated on the display panel and a bent part extending beyond the display panel, wherein the bent part is bent relative to the main body and attached to the side of the display panel and partially covers the surface of the display panel away from the transparent cover. Generally, touch electrodes are formed on the main body of the substrate, and no electrodes are formed on the bent portion. When the touch display device is prepared, when the substrate with touch electrodes is attached to the display panel, the attachment (offset) is prone to misalignment, resulting in the attachment of a part of the blank area of the substrate where the touch electrode is not provided. In the display area, in this way, most areas of the display area are provided with touch electrodes, while a small number of areas do not have touch electrodes. Obviously different visual effects will be observed in these two areas.

In view of this, it is necessary to provide a touch panel, which includes: A light-transmitting, flexible and bendable substrate, comprising a main body part and at least one bending part extending from an edge of the main body part; The touch electrode is arranged on the surface of the main body part; and The dummy electrode is arranged on the surface of the bending part, and both the touch electrode and the dummy electrode are in a grid shape formed by crossing a plurality of metal wires.

On the other hand, a touch display device is also provided, which includes a display panel and the aforementioned touch panel disposed on the display panel.

In the embodiment of the present invention, dummy electrodes are also provided on the bent portion of the substrate. When the touch panel is attached to the display panel, even if the attachment is offset/skewed, the bent portion is provided with the same shape and regular arrangement. , Dummy electrodes are arranged densely, so when viewing the display of the touch display area, the display effect of the touch display area seen by the naked eye is also consistent, avoiding the obvious inconsistency of visual effects in the touch display area.

The accompanying drawings show embodiments of the present invention. The present invention can be implemented in a variety of different forms, and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more comprehensive and complete, and to enable those skilled in the art to fully understand the scope of the present invention.

Example one

1 and FIG. 2, the touch display device 100 of this embodiment includes a transparent cover 40, a display panel 20, and a touch panel 10 located between the transparent cover 40 and the display panel 20. An optical transparent glue 30 is arranged between the transparent cover 40 and the touch panel 10 to integrate the transparent cover 40 and the touch panel 10 into one body, and an optical transparent glue 30 is also arranged between the display panel 20 and the touch panel 10 The display panel 20 and the touch panel 10 are combined into one body.

Please refer to FIG. 2. In this embodiment, the touch panel 10 includes a substrate 11 and touch electrodes 13 on two opposite surfaces of the substrate 11.

The substrate 11 is light-transmissive, electrically insulating, flexible and bendable, for example, its material may be polyethylene terephthalate (PET). The area size of the substrate 11 is larger than the size of the display panel 20. The substrate 11 includes a main body 111 laminated on the display panel 20 and at least one bent part 113 formed by bending and extending the edge of the main body 111. The bent part 113 is a part of the substrate 11 that extends beyond the display panel 20. The main body 111 defines a touch area of the touch panel 10. The display panel 20 has a main surface 21, a side surface 23 connected to the main surface 21, and a back surface 25 opposite to the main surface 21. The main body 111 of the touch panel 10 covers the main surface 21, and the bending part 113 of the touch panel 10 covers at least the side surface 23. In this embodiment, the bent portion 113 covers the side surface 23 and part of the back surface 25.

As shown in FIG. 2, an optical clear glue 30 is also provided between the bending portion 113 and the side surface 23, and an optical clear glue 30 is also provided between the bending portion 113 and the back surface 25. The touch display device 100 can be a mobile phone, a tablet computer, a notebook computer, etc. The display panel 20 may be a liquid crystal display panel, an OLED display panel, a micro LED display panel 20, etc. In this embodiment, the display panel 20 is a liquid crystal display panel 20.

A bending line 115 is formed between the main body 111 and the bending portion 113. Before bending, the main body 111 and the bending portion 113 are on the same horizontal plane, as shown in FIGS. 3 and 4; the bending portion 113 is bent along the bending line 115 After folding, the main body 111 and the bending part 113 are located on different horizontal planes, as shown in FIG. 2. In this embodiment, the main body 111 is roughly rectangular, and the number of the bent portion 113 is one and is located on one side of the main body 111. The at least one bending portion 113 may also include two bending portions 113 disposed on opposite sides of the main body 111. It is understandable that the relative positions of the two bending portions 113 are not limited to being located on opposite sides of the main body portion 111, and may also be set as two adjacent sides of the main body portion 111; The number of parts 113 is not limited to two, and may be one or three or more.

As shown in FIG. 2, the touch electrode 13 includes a first touch electrode 131 and a second touch electrode 133. The first touch electrode 131 is located on the first surface 101 of the main body 111 close to the display panel 20, and the second touch electrode 133 is located on the second surface 103 of the main body 111 away from the display panel 20. In addition, the bending portion 113 has two opposite surfaces, an inner surface 102 and an outer surface 104, respectively. The inner surface 102 is formed by extending from the first surface 101 of the main body 111; the outer surface 104 is extending from the second surface 103 of the main body 111. form. The inner surface 102 and the outer surface 104 are not blank, but are provided with dummy electrodes 60 respectively.

In this embodiment, the first touch electrode 131 and the second touch electrode 133 are mutually touch driving electrodes and touch sensing electrodes, and the first touch electrode 131 and the second touch electrode 133 cooperate to sense touch.控位。 Control position. In this embodiment, the first touch electrode 131 is a touch driving electrode, and the second touch electrode 133 is a touch sensing electrode. In other embodiments, the second touch electrode 133 is a touch driving electrode, and the first touch electrode 131 is a touch sensing electrode.

As shown in FIGS. 3 and 4, the first touch electrode 131 and the second touch electrode 133 are both in the shape of a complex grid formed by a plurality of metal wires crossing; correspondingly, the dummy electrode 60 on the bending portion 113 is also A plurality of metal wires intersecting to form a plurality of metal grids. The shape, arrangement pattern, and arrangement density of the dummy electrodes 60 provided on the inner surface 102 of the bent portion 113 are respectively consistent with the shape, arrangement pattern, and arrangement density of the first touch electrode 131. As shown in FIG. 3, in this embodiment, the first touch electrode 131 is a plurality of metal grids extending along the first direction D1, and the plurality of first touch electrodes 131 are arranged along the second direction D2 (perpendicular to the direction D1). A broken grid line is connected between two adjacent first touch electrodes 131, so that the two adjacent first touch electrodes 131 are electrically insulated. Similarly, the dummy electrode 60 provided on the inner surface 102 of the bent portion 113 has the same shape, arrangement pattern, and arrangement density as the first touch electrode 131. For example, the dummy electrode 60 is also a plurality of metal grids extending along the first direction D1, and a broken grid line is connected between two adjacent dummy electrodes 60.

As shown in FIG. 4, the shape, arrangement pattern, and arrangement density of the dummy electrodes 60 provided on the outer surface 104 of the bent portion 113 are respectively consistent with the shape, arrangement pattern, and arrangement density of the second touch electrode 133. As shown in FIG. 4, in this embodiment, the second touch electrode 133 is a metal mesh extending along the second direction D2, a plurality of second touch electrodes 133 are arranged along the first direction D1, and two adjacent second touch electrodes 133 are arranged along the first direction D1. A broken grid line is connected between the two touch electrodes 133 to electrically insulate the two adjacent second touch electrodes 133. Similarly, the dummy electrodes 60 provided on the outer surface 104 of the bending portion 113 and the second touch electrodes 133 have the same shape, arrangement pattern, and arrangement density. For example, the dummy electrode 60 is also a plurality of metal grids extending along the second direction D2, and a broken grid line is connected between two adjacent dummy electrodes 60.

In general, the shape, arrangement pattern, and arrangement density of the electrodes on the main body 111 and the dummy electrodes 60 on the bending portion 113 are the same. When in use, the dummy electrode 60 on the inner surface 102 of the bent portion 113 may not be connected to an electrical signal.

In this way, even when the touch panel 10 is attached to the display panel 20, even if the pasting/sticking is a little bit skewed (for example, the part of the bent portion 113 is attached to the touch display area), because the bent portion 113 is provided There are dummy electrodes 60 of the same shape, regularity, and density. Therefore, when viewing the display of the touch display area, the display effect of the touch display area seen by the naked eye is also consistent, which will not cause obvious appearance of the touch display area. The problem of inconsistent visual effects.

Along the left and right directions of the touch display device 100, the extension length W of each bending portion 113 is at least greater than or equal to (π*R+2mm), where π represents the circumference ratio, and R is the optical transparent glue between the display panel 20 and the substrate 11 30 and half of the overall thickness of the display panel 20, plus 2 mm is a tolerance value for manual attachment.

Example two

Please refer to FIG. 5, the touch display device 200 of the second embodiment includes a transparent cover 40, a display panel 20, and a touch panel 10 located between the transparent cover 40 and the display panel 20. An optical transparent glue 30 is arranged between the transparent cover 40 and the touch panel 10 to integrate the transparent cover 40 and the touch panel 10 into one body, and an optical transparent glue 30 is also arranged between the display panel 20 and the touch panel 10 The display panel 20 and the touch panel 10 are combined into one body.

In this embodiment, the touch panel 10 includes a substrate 11 and a touch electrode 13 on a surface of the substrate 11. The touch electrode 13 is a single-layer self-capacitive type for sensing the touch position. The substrate 11 is flexible and bendable, and its area size is larger than the size of the display panel 20. The substrate 11 includes a main body portion 111 laminated on the display panel 20 and a bending portion 113 extending beyond the display panel 20. The bending portion 113 is bent relative to the main body portion 111 and attached to the side of the display panel 20 and partially covers the display panel 20. Keep away from the surface of the transparent cover 40.

In this embodiment, the touch electrode 13 is formed on the surface of the main body 111 away from the display panel 20; in addition, the bent portion 113 is formed on a surface extending from the surface of the main body 111 away from the display panel 20. Dummy electrode 60. The touch electrode 13 and the dummy electrode 60 of the bending portion 113 are both in the shape of a metal mesh. The shape, arrangement pattern, and arrangement density of the dummy electrodes 60 provided on the surface of the bending portion 113 are consistent with the shape, arrangement pattern, and arrangement density of the touch electrodes 13 on the surface of the main body 111 away from the display panel 20.

In the embodiment of the present invention, by providing dummy electrodes 60 on the bending portion 113 of the substrate 11, when the touch panel 10 is attached to the display panel 20, even if the attaching/attaching is slightly skewed (for example, the portion of the bending portion 113 Attached to the touch display area), because the bending part 113 is provided with dummy electrodes 60 of the same shape, regular arrangement, and arrangement density, so when viewing the display of the touch display area, the naked eye can see the difference of the touch display area. The display effect is also consistent, and will not cause obvious visual inconsistencies in the touch display area.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. The up, down, left, and right directions shown in the figures are only for ease of understanding, although the present invention has been described in detail with reference to the preferred embodiments. A person of ordinary skill should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

100, 200: touch display device 40: Transparent cover 20: display panel 10: Touch panel 30: Optical transparent glue 11: substrate 101: first surface 103: second surface 102: inner surface 104: outer surface 13: Touch electrode 131: The first touch electrode 133: second touch electrode 60: Dummy electrode 111: main body 113: Bending part 115: bend line 21: Main surface 23: side 25: back

FIG. 1 is a three-dimensional schematic diagram of a touch display device according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of Fig. 1 along the line II-II.

FIG. 3 is a partial schematic diagram of the substrate in FIG. 1 when it is unfolded in a plane.

FIG. 4 is a partial schematic diagram of the substrate in FIG. 1 when it is expanded in a plane from another angle.

FIG. 5 is a schematic partial cross-sectional view of a touch display device according to a second embodiment of the invention.

40: Transparent cover

20: display panel

10: Touch panel

30: Optical transparent glue

11: substrate

101: first surface

103: second surface

102: inner surface

104: outer surface

13: Touch electrode

131: The first touch electrode

133: second touch electrode

60: Dummy electrode

111: main body

113: Bending part

21: Main surface

23: side

25: back

Claims (8)

A touch panel is improved in that it comprises: a light-transmissive and flexible substrate, the substrate comprising a main body and at least one bending part extending from an edge of the main body, the main body defining The touch area of the touch panel; The touch electrode is arranged on the surface of the main body part; and The dummy electrode is arranged on the surface of the bending part, and both the touch electrode and the dummy electrode are in a grid shape formed by crossing a plurality of metal wires. The touch panel according to claim 1, wherein the touch electrode and the dummy electrode are formed on the same surface of the substrate before bending. The touch panel according to claim 1, wherein the shape, arrangement law, and arrangement density of the dummy electrodes are consistent with the shape, arrangement law, and arrangement density of the touch electrodes. The touch panel according to claim 1, wherein the substrate includes a first surface and a second surface opposite to the first surface, and the touch electrode includes a first surface disposed on the first surface. A touch electrode and a second touch electrode disposed on the second surface; the bent portion includes an inner surface extending from the first surface and an outer surface extending from the second surface; the inner Dummy electrodes are provided on both the surface and the outer surface. The touch panel according to claim 4, wherein the shape, arrangement pattern, and arrangement density of the dummy electrodes on the inner surface are respectively consistent with the shape, arrangement pattern, and arrangement density of the first touch electrode. The touch panel according to claim 4, wherein the shape, arrangement pattern, and arrangement density of the dummy electrodes on the outer surface are respectively consistent with the shape, arrangement pattern, and arrangement density of the second touch electrode. A touch display device includes a display panel and a touch panel arranged on the display panel, the touch panel being the touch panel described in any one of claim items 1 to 6. The touch display device according to claim 7, wherein the display panel has a main surface, a side surface connected to the main surface, and a back surface opposite to the main surface, and the main body of the touch panel covers all On the main surface, the bent portion of the touch panel covers at least the side surface.

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