TWM586384U - In-cell touch display panel - Google Patents

Abstract

An in-cell touch display panel having a display area and a surrounding area located in at least one side of the display area is provided. The in-cell touch display panel includes a plurality of touch electrodes, a plurality of touch lines, a plurality of signal shielding lines, a first drive unit, and a second drive unit. The plurality of touch electrodes are disposed in the display area. There is a space between the neighbor touch electrodes. The plurality of touch lines are extended toward a first direction. Each touch lines is electrically connected to the corresponding touch electrodes. The plurality of signal shielding lines are extended toward the first direction. Each signal shielding lines is correspondingly disposed to the space between the neighbor touch electrodes in a second direction. The second direction and the first direction are orthogonal. The first drive unit is disposed in the surrounding area and is electrically connected to the plurality of touch lines. The second drive unit is disposed in the surrounding area and is electrically connected to the plurality of signal shielding lines.

Description

Embedded touch display panel

The novel creation relates to a touch display panel, and more particularly to an in-cell touch display panel.

The in-cell touch display panel generally uses the cut common electrode layer as a touch electrode to sense the touch position applied to the in-cell touch liquid crystal display panel. In order for the in-cell touch display panel to have a certain pixel aperture ratio, the gap between adjacent touch electrodes needs to be small; however, when a touch electrode generates a voltage change due to a user's touch, When the signal is transmitted, it is easy to interfere with another touch electrode adjacent to the touch line in a direction perpendicular to the extending direction of the touch line to generate an unnecessary coupling signal, which makes the signal-to-noise ratio of the embedded touch display panel decline.

The novel creation provides an in-cell touch display panel with an improved signal-to-noise ratio.

The novel in-cell touch display panel has a display area and a peripheral area located on at least one side of the display area. The in-cell touch display panel created by the present invention includes a plurality of touch electrodes, a plurality of touch traces, a plurality of signal shielding lines, a first driving unit and a second driving unit. A plurality of touch electrodes are disposed in the display area. There is a gap between adjacent touch electrodes. The multiple touch traces extend along the first direction. Each touch trace is electrically connected to a corresponding touch electrode. A plurality of signal shielding lines extend in a first direction. Each signal shielding line is disposed corresponding to a gap between adjacent touch electrodes in the second direction. The second direction is orthogonal to the first direction. The first driving unit is disposed in the peripheral area and is electrically connected to the plurality of touch traces. The second driving unit is disposed in the peripheral area and is electrically connected to a plurality of signal shielding lines.

In an embodiment of the present invention, the plurality of touch electrodes and the plurality of signal shielding lines are in different layers.

In an embodiment of the present invention, the above-mentioned multiple touch traces and multiple signal shielding lines are on the same layer.

In an embodiment of the novel creation, the gap is 1 μm to 18 μm.

In an embodiment of the present invention, the horizontal distance between the signal shielding line and the adjacent touch electrode in the second direction is 1 micrometer to 10 micrometers.

In an embodiment of the present invention, the plurality of touch electrodes and the plurality of signal shielding lines are on the same layer.

In one embodiment of the novel creation, the gap is 3 μm to 18 μm.

In an embodiment of the present invention, the horizontal distance between the signal shielding line and the adjacent touch electrode in the second direction is 1 micrometer to 10 micrometers.

In an embodiment of the present invention, the above-mentioned second driving unit provides a ground signal to a plurality of signal shielding lines.

In an embodiment of the present invention, the above-mentioned in-cell touch display panel further includes a substrate, an opposite substrate, and a display medium layer. A plurality of touch electrodes, a plurality of touch traces, a plurality of signal shielding lines, a first driving unit and a second driving unit are disposed on the substrate. The opposing substrate is disposed opposite to the base. The display medium layer is disposed between the substrate and the opposite substrate.

Based on the above, the setting of the signal shielding line in the present invention can prevent the signal generated by the user from touching the touch electrode from interfering with another touch electrode adjacent to it in the second direction to generate a coupling signal, thereby avoiding Generate noise to improve signal-to-noise ratio.

In order to make the above-mentioned features and advantages of the novel creation more comprehensible, embodiments are described below in detail with the accompanying drawings as follows.

In the following, the novel creation will be explained more fully with reference to the drawings of this embodiment. However, the novel creation can also be embodied in various forms and should not be limited to the embodiments described herein. The thicknesses of layers and regions in the drawings are exaggerated for clarity. The same or similar reference numbers indicate the same or similar elements, and the following paragraphs will not repeat them one by one. In addition, the directional terms mentioned in the embodiments, such as: up, down, left, right, front, or rear, are only directions referring to the attached drawings. Therefore, the terminology used is used to explain and is not used to limit the novel creation.

FIG. 1 is a schematic cross-sectional view of an in-cell touch display panel according to an embodiment of the present invention. FIG. 2 is a schematic top view of a substrate carrying touch electrodes and signal shielding lines according to an embodiment of the present invention.

Referring to FIG. 1, the in-cell touch display panel 10 of this embodiment includes a substrate 100, an opposite substrate 200, and a display medium layer 300. The substrate 100 and the opposite substrate 200 are disposed facing each other, and the display medium layer 300 is disposed between the substrate 100 and the opposite substrate 200, for example.

Referring to FIG. 2, in an embodiment, the substrate 100 includes a substrate SB, a plurality of touch electrodes TE, a plurality of touch traces TL, a plurality of signal shielding lines SSL, a plurality of first driving units SR1 and a second driver. Unit SR2. From another perspective, the substrate 100 has, for example, a display area 10 a and a peripheral area 10 b.

The substrate SB provided by the substrate 100 may be, for example, a flexible substrate, which may be a polymer substrate or a plastic substrate, but the present invention is not limited thereto. In other embodiments, the substrate SB of the substrate 100 may be, for example, a rigid substrate, which may be a glass substrate, a quartz substrate, or a silicon substrate.

In an embodiment, an active device (not shown) including a gate (not shown), a source (not shown), a drain (not shown), and a semiconductor layer (not shown) is disposed on the substrate SB. ). The active device is, for example, any bottom-gate thin-film transistor known to those skilled in the art. However, although the present embodiment takes the bottom gate type thin film transistor as an example, the novel creation is not limited to this. In other embodiments, the active device is, for example, a top-gate thin-film transistor or another suitable type of thin-film transistor.

In an embodiment, the substrate 100 may further include a plurality of scanning lines (not shown), a plurality of data lines (not shown), and a plurality of pixel electrodes (not shown). Each active device may be separately connected to the substrate 100. The corresponding scanning lines and the corresponding data lines are electrically connected, but this new creation is not limited to this. Each pixel electrode may, for example, form an electric field with the corresponding touch electrode TE to drive the liquid crystal molecules of the liquid crystal layer to rotate, so that the in-cell touch display panel 10 can display a picture, but the novel creation is not limited thereto.

The material of the plurality of touch electrodes TE may be, for example, a transparent conductive material. For example, the material of the plurality of touch electrodes TE is indium tin oxide. The plurality of touch electrodes TE are arranged in the display area 10a in a manner of being separated from each other and arranged in an array, for example, for detecting the touch position. In detail, each of the plurality of touch electrodes TE is separated from each other and is electrically independent, and there is a gap S between adjacent touch electrodes TE, and the gap S is 1 μm to 18 μm. In one embodiment, the shape of each touch electrode TE is rectangular, but the present invention is not limited to this. The aforementioned plurality of touch electrodes TE may include, for example, a self-capacitive sensing electrode, that is, the touch electrode TE may be subjected to a driving voltage. When the user presses a specific touch electrode TE, the touch electrode TE corresponds to a user's finger. The voltage of the self-capacitive sensing electrode changes, and the position of the user's touch can be known by detecting the voltage change.

In addition, the plurality of touch electrodes TE may be used for display purposes in addition to the use for detecting touch positions. For example, the in-cell touch display panel 10 of this embodiment may perform a display action and a touch sensing action in a display period and a touch period in the display time of one frame, respectively. During the display period, multiple touch electrodes TE are used as a common electrode. The voltage difference between the touch electrodes TE and the pixel electrodes is used to drive the display medium layer 300 to enable the in-cell touch display. The panel 10 displays a screen. During the touch period, the position of the user's touch is determined by sensing the voltage changes of the plurality of touch electrodes TE.

The plurality of touch traces TL extend along the first direction D1, for example. Each of the plurality of touch traces TL is electrically connected to a corresponding touch electrode TE to receive a signal generated by the touch electrode TE after being touched by a user. The plurality of touch traces TL may include, for example, a metal material.

The plurality of signal shielding lines SSL extend along the first direction D1, for example. In this embodiment, the plurality of signal shielding lines SSL and the plurality of touch electrodes TE are different layers, and the plurality of signal shielding lines SSL correspond to the gap S between the adjacent touch electrodes TE in the vertical direction Z. Settings. In detail, if only the relative arrangement relationship between the signal shielding wire SSL and the touch electrode TE is viewed from a plan view angle, the signal shielding wire SSL is provided between adjacent touch electrodes TE in the second direction D2. Each signal shielding line SSL has a specific horizontal distance d _h in the second direction D2, for example, from the adjacent touch electrode TE, as shown in FIG. 2. In one embodiment, the horizontal distance d _h between the signal shielding line SSL and the adjacent touch electrode TE in the second direction D2 is 1 μm to 10 μm. The plurality of signal shielding lines SSL may be the same metal layer as the plurality of touch traces TL, but the novel creation is not limited thereto. In other embodiments, the plurality of signal shielding lines SSL and the plurality of touch traces TL may be different metal layers.

The plurality of first driving units SR1 and the second driving units SR2 are provided in the peripheral region 10b, for example. Each first driving unit SR1 is electrically connected to a corresponding touch line TL, for example, and is electrically connected to a corresponding touch electrode TE. In this embodiment, in addition to driving the pixels (not shown) in the display area 10a to display the screen, the first driving unit SR1 also senses the voltage change output through the touch electrode TE to determine the user Touch location. The second driving unit SR2 is, for example, electrically connected to the signal shielded wire SSL to provide a shielded signal (such as a ground signal) to the signal shielded wire SSL.

In one embodiment, the opposite substrate 200 is a color filter substrate. For example, at least three color filter patterns are provided on the opposite substrate 200, which can be converted into different colors and corresponding to sub-pixels (eg, sub-pixels of different colors). In an embodiment, the different colors converted by the color filter pattern may be, for example, three primary colors, which may be red, green, and blue, for example, but the present invention is not limited thereto. The opposite substrate 200 may further include a base (not shown), a black matrix (not shown), and a common electrode (not shown), but the present invention is not limited thereto. The substrate provided by the opposite substrate 200 may be the same as or different from the substrate SB provided by the substrate 100, which has been described in detail in the foregoing embodiments, and is not repeated here.

A frame adhesive (not shown) is disposed between the substrate 100 and the opposite substrate 200, for example. From another perspective, the frame adhesive is disposed in the peripheral region 10 b of the in-cell touch display panel 10. The sealant may, for example, include a plurality of sealant spacers (not shown). For example, the frame adhesive is, for example, conductive particles having a specific size or spacers having a specific shape, but the present invention is not limited thereto. The sealant may be formed by curing after being irradiated with ultraviolet light, and used for bonding the substrate 100 and the opposite substrate 200.

In one embodiment, the display medium layer 300 is filled in the accommodating space formed by the sealant, the substrate 100 and the opposite substrate 200. From another perspective, the display medium layer 300 is disposed in the display area 10 a of the in-cell touch display panel 10. The display medium layer 300 may include non-self-luminous materials, such as liquid crystal molecules, electrophoretic display media, or other applicable media as examples. When the display medium layer 300 is made of a non-self-luminous material, the in-cell touch display panel 10 may include other backlight light sources (not shown). In other embodiments, the display medium layer 300 may include a self-luminous material, such as an inorganic material, an organic material, or a combination of the foregoing materials. In this embodiment, the display medium layer 300 is a liquid crystal molecule. The liquid crystal molecules are preferably liquid crystal molecules that can be rotated or switched by a vertical electric field or liquid crystal molecules that can be rotated or switched by a lateral electric field, but the invention is not limited thereto.

Since the signal shielding line of this embodiment is arranged correspondingly to the gap between adjacent touch electrodes in the vertical direction, when the touch electrode is touched by the user to generate a voltage change signal, the signal is due to the signal The shield line is set without disturbing the signals of the touch electrodes adjacent to it in the second direction to avoid coupling between the signals and generating noise, thereby improving the signal-to-noise ratio.

FIG. 3 is a schematic top view of a substrate carrying touch electrodes and signal shielding lines according to another embodiment of the novel creation. It must be noted here that the embodiment shown in FIG. 3 follows the component numbers and parts of the embodiment of FIG. 2, in which the same or similar reference numerals are used to indicate the same or similar components, and the description of the same technical content is omitted. . For the description of the omitted parts, reference may be made to the description and effects of the foregoing embodiments, and the following embodiments are not repeated.

Please refer to FIG. 3. The difference between the substrate 100 ′ shown in FIG. 3 and the substrate 100 shown in FIG. 2 is that multiple signal shielding lines SSL ′ and multiple touch electrodes TE ′ in the substrate 100 ′ are on the same layer. . In detail, a plurality of signal shielding lines SSL 'and a plurality of touch electrodes TE' are formed by performing the same process, and the signal shielding lines SSL 'are located in the adjacent touch electrodes TE' in the second direction D2. between. Based on this, the gap S ′ between adjacent touch electrodes TE ′ may be larger than the gap S between adjacent touch electrodes TE in the foregoing embodiment. In an embodiment, the gap S ′ between the adjacent touch electrodes TE ′ in the second direction D2 is 3 μm to 18 μm, and the signal shielding line SSL ′ is adjacent to the adjacent touch electrode TE ′. The horizontal distance d _h ′ is 1 μm to 10 μm. The plurality of signal shielding lines SSL ′ and the plurality of touch electrodes TE ′ in this embodiment are formed by performing the same process. Although the pixel aperture ratio is slightly sacrificed (because of the gap S ′> the gap S), the manufacturing is reduced It also has the effect of avoiding the coupling signal of the adjacent touch electrode TE ′ due to being touched by the user.

Since the signal shielding line of this embodiment is disposed between the adjacent touch electrodes in the second direction, when the touch electrode is touched by the user to generate a voltage change signal, the signal is due to the signal shielding line. It is set without disturbing the signals of the touch electrodes adjacent to it in the second direction to avoid coupling between the signals and generating noise, thereby improving the signal-to-noise ratio.

To sum up, the setting of the signal shielding line in this novel creation can prevent the signal generated by the touch electrode from being touched by the user from interfering with another touch electrode adjacent to it in the second direction to generate a coupling signal. This avoids generating noise to improve the signal-to-noise ratio of the in-cell touch display panel created by the new creation.

Although this new type of creation has been disclosed in the above examples, it is not intended to limit the new type of creation. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this new type of creation. Retouching, so the protection scope of this new type of creation shall be determined by the scope of the attached patent application.

10‧‧‧ Embedded touch display panel
10a‧‧‧display area
10b‧‧‧Peripheral area
100, 100'‧‧‧ substrate
200‧‧‧ Opposite substrate
300‧‧‧Display media layer
D1‧‧‧ first direction
D2‧‧‧ Second direction
d _h , d _h '‧‧‧ horizontal distance
S, S'‧‧‧ clearance
SB‧‧‧ substrate
SR1‧‧‧first drive unit
SR2‧‧‧Second Drive Unit
SSL, SSL'‧‧‧ signal shielded wire
TE, TE'‧‧‧ touch electrode
TL‧‧‧Touch Trace
Z‧‧‧ vertical

FIG. 1 is a schematic cross-sectional view of an in-cell touch display panel according to an embodiment of the present invention.
FIG. 2 is a schematic top view of a substrate carrying touch electrodes and signal shielding lines according to an embodiment of the present invention.
FIG. 3 is a schematic top view of a substrate carrying touch electrodes and signal shielding lines according to another embodiment of the novel creation.

Claims (10)

An in-cell touch display panel having a display area and a peripheral area located on at least one side of the display area includes:
A plurality of touch electrodes are disposed in the display area, and there is a gap between adjacent touch electrodes;
Multiple touch traces extending along the first direction, wherein each touch trace is electrically connected to a corresponding touch electrode;
A plurality of signal shielding lines extending along the first direction, wherein each of the signal shielding lines is disposed corresponding to the gap between adjacent touch electrodes in a second direction, and the second direction and the Said first direction is orthogonal;
A first driving unit is disposed in the peripheral area and is electrically connected to the plurality of touch traces; and a second driving unit is disposed in the peripheral area and is electrically connected to the plurality of signal shielding lines. connection. The in-cell touch display panel according to item 1 of the scope of patent application, wherein the plurality of touch electrodes and the plurality of signal shielding lines are in different layers. The in-cell touch display panel according to item 2 of the scope of patent application, wherein the plurality of touch traces and the plurality of signal shielding lines are on the same layer. The in-cell touch display panel according to item 2 of the scope of patent application, wherein the gap is 1 micrometer to 18 micrometers. The in-cell touch display panel according to item 2 of the patent application scope, wherein a horizontal distance between the signal shielding line in the second direction and an adjacent touch electrode is 1 μm to 10 μm. The in-cell touch display panel according to item 1 of the patent application scope, wherein the plurality of touch electrodes and the plurality of signal shielding lines are on the same layer. The in-cell touch display panel according to item 6 of the scope of application for a patent, wherein the gap is 3 μm to 18 μm. The in-cell touch display panel according to item 6 of the patent application scope, wherein a horizontal distance between the signal shielding line in the second direction and an adjacent touch electrode is 1 μm to 10 μm. The in-cell touch display panel according to item 1 of the scope of patent application, wherein the second driving unit provides a ground signal to the plurality of signal shielding lines. The in-cell touch display panel described in item 1 of the patent application scope further includes:
A substrate, wherein the plurality of touch electrodes, the plurality of touch traces, the plurality of signal shielding lines, the first driving unit and the second driving unit are disposed on the substrate;
An opposite substrate is disposed opposite to the substrate; and a display medium layer is disposed between the substrate and the opposite substrate.