CN107145014B - Display panel and method for manufacturing display panel - Google Patents
Display panel and method for manufacturing display panel Download PDFInfo
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- CN107145014B CN107145014B CN201710561354.7A CN201710561354A CN107145014B CN 107145014 B CN107145014 B CN 107145014B CN 201710561354 A CN201710561354 A CN 201710561354A CN 107145014 B CN107145014 B CN 107145014B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
Abstract
The invention discloses a display panel and a manufacturing method of the display panel, wherein the display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate; the first substrate or the second substrate is provided with a black matrix; the first substrate includes: a substrate base plate; the pixel structure comprises a plurality of data lines and a plurality of scanning lines which are positioned on a substrate, wherein the data lines and the scanning lines are crossed to define a plurality of pixel units; the pixel unit comprises a common electrode and a pixel electrode which are arranged in a different-layer insulation manner; the auxiliary electrodes are positioned between the adjacent pixel units and positioned on one side of the common electrode, which is far away from the substrate, wherein the auxiliary electrodes and the common electrode have the same potential; the vertical projection of the auxiliary electrode on the substrate base plate is positioned in the vertical projection of the black matrix on the substrate base plate. The technical scheme provided by the embodiment of the invention can solve the problem of residual images on the display panel and improve the display effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a manufacturing method of the display panel.
Background
The conventional liquid crystal display panel includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate. The liquid crystal layer has a part of impurity particles in addition to liquid crystal molecules, and the impurity particles may include positive ions and negative ions.
In the display process, under the action of an electric field generated between a pixel electrode and a common electrode in a display panel, liquid crystal molecules deflect, meanwhile, impurity particles are also gathered on an alignment layer formed by Polyimide (PI), when the impurities are gathered more, because the impurity particles move slowly, after the electric field generated by the pixel electrode and the common electrode disappears, the gathered ions cannot leave the surface of the alignment layer immediately, and thus, a residual image is formed. The ion accumulation is mainly caused by a direct current voltage between the pixel electrode and the common electrode, and therefore the problem is also called that the ion Direct Current (DC) residue causes afterimage. Especially, for a liquid crystal display panel with a large circuit load, the power consumption is high, the heat generation is high, and at a high temperature, impurity particles are more active, so that a serious ghost phenomenon is formed.
Disclosure of Invention
The invention provides a display panel and a manufacturing method of the display panel, which aim to solve the problem of residual images of the existing liquid crystal display panel and improve the display effect.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate; the first substrate or the second substrate is provided with a black matrix;
the first substrate includes:
a substrate base plate; a plurality of data lines and a plurality of scan lines on the substrate, the plurality of data lines and the plurality of scan lines crossing to define a plurality of pixel units; the pixel unit comprises a common electrode and a pixel electrode which are arranged in a different-layer insulation manner;
a plurality of auxiliary electrodes located between adjacent pixel units and on a side of the common electrode away from the substrate, wherein the auxiliary electrodes and the common electrode have the same potential;
wherein, the vertical projection of the auxiliary electrode on the substrate base plate is positioned in the vertical projection of the black matrix on the substrate base plate.
In a second aspect, an embodiment of the present invention further provides a manufacturing method of a display panel, where the manufacturing method includes:
forming a first substrate and a second substrate, and attaching the first substrate and the second substrate, wherein a liquid crystal layer is arranged between the first substrate and the second substrate; a black matrix is formed on the first substrate or the second substrate;
the forming the first substrate includes:
providing a substrate base plate;
forming a plurality of data lines and a plurality of scanning lines on the substrate, wherein the plurality of data lines and the plurality of scanning lines intersect to define a plurality of pixel units; the pixel unit comprises a common electrode and a pixel electrode which are arranged in a different-layer insulation manner;
forming a plurality of auxiliary electrodes on one side of the common electrode, which is far away from the substrate base plate, wherein the auxiliary electrodes are positioned between the adjacent pixel units, and the formed auxiliary electrodes and the common electrode have the same potential;
wherein, the vertical projection of the auxiliary electrode on the substrate base plate is positioned in the vertical projection of the black matrix on the substrate base plate.
According to the technical scheme provided by the embodiment of the invention, as the potential of the auxiliary electrode is the same as that of the common electrode and is positioned on one side of the common electrode, which is far away from the substrate, namely, is closer to liquid crystal molecules in the liquid crystal layer, in the display process of the display panel, impurity ions in the liquid crystal molecules can be gathered near the position of the auxiliary electrode, the position can capture the impurity ions, the auxiliary electrode is shielded by the black matrix, the position area for gathering the impurity ions is also shielded by the black matrix and is not used for light transmission display, and the gathered impurity ions at the position do not influence normal display. Moreover, impurity ions in the light-transmitting area of the display panel are relatively reduced, and the ion DC residue in the light-transmitting area can be reduced, so that the afterimage phenomenon in the display panel is effectively improved, and the display effect is improved.
Drawings
Fig. 1A is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 1B is a top view of a first substrate in a display panel according to an embodiment of the invention;
fig. 1C is a top view of a second substrate in a display panel according to an embodiment of the invention;
FIG. 1D is a schematic diagram of an embodiment of a display panel with an aggregate of impurity ions;
FIG. 1E is a cross-sectional view of the first substrate taken along a-a of FIG. 1B;
fig. 2 is a top view of a display panel according to an embodiment of the present invention;
FIG. 3A is a top view of a first substrate according to an embodiment of the invention;
FIG. 3B is a cross-sectional view taken along the line B-B in FIG. 3A;
FIG. 3C is a cross-sectional view taken along line C-C of FIG. 3A;
FIG. 3D is a cross-sectional view of a first substrate according to an embodiment of the invention;
FIG. 3E is a top view of another embodiment of a first substrate;
fig. 4 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1A is a schematic cross-sectional view of a display panel according to an embodiment of the invention. Referring to fig. 1A, the display panel includes a first substrate 10 and a second substrate 20 disposed opposite to the first substrate 10, and a liquid crystal layer 30 between the first substrate 10 and the second substrate 20, the liquid crystal layer 30 including a plurality of liquid crystal molecules; the first substrate 10 or the second substrate 20 is provided with a black matrix, and the black matrix 21 is exemplarily provided on the second substrate 20 in fig. 1A.
Fig. 1B is a top view of a first substrate in a display panel provided in the present invention, and fig. 1C is a top view of a second substrate in a display panel provided in an embodiment of the present invention, and referring to fig. 1A, 1B, and 1C, the first substrate includes:
a substrate base plate 111; a plurality of data lines 101 and a plurality of scan lines 102 on a substrate 111, the plurality of data lines 101 and the plurality of scan lines 102 intersecting to define a plurality of pixel cells 103; the pixel unit 103 includes a common electrode 12, a pixel electrode 11, and a Thin Film Transistor (TFT) 105, which are insulated from each other, the pixel electrode 11 is electrically connected to a drain/source of the TFT 105, the data line 101 is electrically connected to a source/drain of the TFT 105, and the scan line 102 is electrically connected to a gate of the TFT 105. 201 is a display area of the display panel, 202 is a non-display area of the display panel, the non-display area 202 is provided with a data driving circuit 203 and a gate driving circuit 204, the data driving circuit 203 can be electrically connected with a plurality of data lines 101 for providing data signals to the data lines 101; the gate driving circuit 204 may be electrically connected to the plurality of scan lines 102, and is configured to provide scan signals to the scan lines 102 to turn on the thin film transistors 105, so as to write data signals on the data lines 101 into the pixel electrodes 11.
A plurality of auxiliary electrodes 13, wherein the auxiliary electrodes 13 are positioned between the adjacent pixel units 103 and positioned on one side of the common electrode 12 away from the substrate 111, and the auxiliary electrodes 13 and the common electrode 12 have the same potential;
the vertical projection of the auxiliary electrode 13 on the substrate 111 is located in the vertical projection of the black matrix 21 on the substrate 111, that is, the black matrix 21 shields the auxiliary electrode 13 when looking at the display panel from the front of the display panel, and the auxiliary electrode 13 is located in the non-opening area (opaque area) of the display panel.
It should be noted that 22 may represent a color resistance within the display panel, and may include a red color resistance, a green color resistance, and a blue color resistance. The opening region of the pixel unit 103 is a light-transmitting region, i.e. the region where the color resistor 22 does not overlap the black matrix 21, and the region where the black matrix 21 is located is opaque. In other embodiments of the present invention, the black matrix 21 may be disposed on the first substrate 10. Wherein 110 is an insulating layer on the first substrate, and 211 is a substrate in the second substrate.
The potential on the auxiliary electrode 13 may be supplied by a drive circuit, and specifically, the auxiliary electrode 13 may be electrically connected to an output terminal of the drive circuit, and the drive circuit outputs the same signal as the common electrode 12 to the auxiliary electrode 13. The auxiliary electrode 13 may be electrically connected to the common electrode 12, and in this case, the auxiliary electrode 13 and the common electrode 12 have the same potential. Since the potential of the auxiliary electrode 13 is the same as the potential of the common electrode 12 and is located on the side of the common electrode 12 away from the substrate 111, that is, closer to the liquid crystal molecules in the liquid crystal layer 30, during the display of the display panel, the impurity ions in the liquid crystal molecules may be gathered near the position of the auxiliary electrode 13, which captures the impurity ions. For example, referring to fig. 1D, fig. 1D is a schematic diagram of impurity ion accumulation in a display panel according to an embodiment of the present invention, for example, corresponding to the auxiliary electrode 13 on the left side of fig. 1D, the pixel electrode 11 on the left side of the auxiliary electrode 13 is a voltage corresponding to a negative frame, the pixel electrode 11 on the right side is a voltage corresponding to a positive frame, negative impurity ions may accumulate from the position of the pixel electrode 11 on the left side to the auxiliary electrode 13, positive impurity ions may accumulate from the position of the pixel electrode 11 on the right side to the auxiliary electrode 13, and impurity ions may accumulate at the position of the auxiliary electrode. The auxiliary electrode 13 is shielded by the black matrix 21, and the position region where the impurity ions are collected is also shielded by the black matrix 21, and is not used for light transmission display, and the impurity ions collected at the position do not affect normal display. Therefore, the impurity ions in the light-transmitting area of the display panel are relatively reduced, the ion DC residue in the light-transmitting area can be reduced, and the effect of effectively improving the afterimage is further realized.
Fig. 1E is a schematic cross-sectional view of a first substrate along a-a direction according to an embodiment of the invention. Referring to fig. 1E, on the basis of the above embodiment, the first insulating layer 111 is provided between the auxiliary electrode 13 and the common electrode 12; the first insulating layer 111 has a first via hole 131 exposing the common electrode 12; the auxiliary electrode 13 and the common electrode 12 are connected through a first via 131. Since the potential of the auxiliary electrode 13 is the same as the potential of the common electrode 12, the auxiliary electrode 13 is electrically connected to the common electrode 12 through the first via 131, and in the display process, the common voltage signal on the common electrode 12 is transmitted to the auxiliary electrode 13, so that a driving IC (integrated circuit) is not required to provide a corresponding signal to the auxiliary electrode 13, and the structures of circuits and wirings in the first substrate are simplified.
It should be noted that, in fig. 1E, the first insulating layer 111 is exemplarily disposed between the auxiliary electrode 13 and the common electrode 12, in other embodiment modes of the embodiment of the present invention, another film layer may be disposed between the auxiliary electrode 13 and the common electrode 12, that is, a multilayer film layer may be disposed, for example, there may be a multilayer insulating layer between the auxiliary electrode 13 and the common electrode 12.
In the embodiment of the present invention, the material of the auxiliary electrode is a conductive material, for example, a metal material may be used. In addition, the auxiliary electrode 13 and the pixel electrode 11 may be disposed in the same layer, and the auxiliary electrode 13 and the pixel electrode 11 are formed using the same material in the same process. That is, the auxiliary electrode 13 and the pixel electrode 11 are formed in one process, the auxiliary electrode 13 is formed at the same time of forming the pixel electrode 11, and on the basis of solving the problem of image sticking of the display panel by forming the auxiliary electrode 13, the process steps can be saved, and the cost can be reduced. The pixel electrode 11 is generally made of a transparent conductive material, for example, Indium Tin Oxide (ITO) material, the auxiliary electrode 13 and the pixel electrode 11 are made of the same material, and the auxiliary electrode 13 is also made of a transparent conductive material.
Optionally, in the embodiment of the present invention, the auxiliary electrode 13 may be disposed between part of two adjacent columns of pixel units 103, or the auxiliary electrode 13 may be disposed between part of two adjacent rows of pixel units 103. In other embodiments, the auxiliary electrodes 13 may be disposed between two adjacent columns of pixel units 103 and/or two adjacent rows of pixel units 103, so that more auxiliary electrodes 13 are disposed, and the auxiliary electrodes 13 are arranged more uniformly, so that more impurity ions may be gathered at the positions corresponding to the auxiliary electrodes 13, and the problem of ion DC residue is solved better.
Fig. 2 is a schematic top view of another display panel provided in an embodiment of the present invention, in which the auxiliary electrodes 13 and the pixel units 103 are seen through, and on the basis of the above embodiment, the auxiliary electrodes 13 located between two adjacent rows of the pixel units 103 are arranged in segments along the extending direction X of the scanning line; and/or the auxiliary electrodes 13 between two adjacent columns of pixel units 103 along the data line extending direction Y are arranged in segments.
The auxiliary electrodes 13 between two adjacent rows of pixel units 103 are arranged in several segments, and the auxiliary electrodes 13 between two adjacent columns of pixel units 103 are arranged in several segments. For example, in fig. 2, the auxiliary electrode 13 in the first column is divided into three segments, the auxiliary electrodes 13 in the third column are arranged in two segments, and the auxiliary electrodes 13 in each column or each row can be divided into any segments.
Alternatively, fig. 3A is a top view of a first substrate according to an embodiment of the present invention, fig. 3B is a cross-sectional view taken along a direction B-B in fig. 3A, and fig. 3C is a cross-sectional view taken along a direction C-C in fig. 3A. Referring to fig. 3A, 3B and 3C, the display panel provided in the embodiment of the present invention may further include a plurality of touch electrode lines 104; the common electrode is multiplexed as a touch electrode, and comprises a plurality of common electrode blocks 121 arranged in a matrix; each touch electrode line 104 is electrically connected with a common electrode block 121; in the display stage, the touch electrode line 104 transmits a common voltage signal to the common electrode block 121; in the touch stage, the touch electrode line 104 transmits a touch signal to the common electrode block 121; and realizing the touch control function of the display panel.
At least a part of the auxiliary electrode 13 is electrically connected to the touch electrode line 104, for example, the auxiliary electrode 13 is electrically connected to the touch electrode line 104 through a via. The potential of the auxiliary electrode 13 is the same as that of the common electrode block 121, and the touch electrode line 104 is electrically connected to the common electrode block 121, so that a signal on the auxiliary electrode 13 can be transmitted and provided by the touch electrode line 104, that is, at least a part of the touch electrode line 104 transmits a signal to both the common electrode block 121 and the auxiliary electrode 13, and compared with the case of separately providing a signal to the auxiliary electrode 13, the wiring can be saved. In addition, the auxiliary electrode 13 and the touch electrode line 104 may or may not overlap, when the auxiliary electrode 13 and the touch electrode line 104 between the pixel units overlap, the length or the width of the display panel occupied by the auxiliary electrode 13 and the touch electrode line 104 may be saved, and the auxiliary electrode 13 and the touch electrode line 104 need to be shielded by a black matrix, so that the area of the black matrix may be reduced, and the aperture ratio of the display panel may be increased.
The auxiliary electrode 13 may be electrically connected to the common electrode block 121, for example, electrically connected to the common electrode block 121 through a via hole, or may be directly connected to an output terminal of a driver IC, and the driver IC may supply the same potential as that of the common electrode block 121 to the auxiliary electrode 13. In the embodiment of the present invention, a part of the auxiliary electrode 13 may be electrically connected to the touch electrode line 104, a part of the auxiliary electrode 13 is electrically connected to the common electrode block 121, and a part of the auxiliary electrode 13 is electrically connected to the output terminal of the driving IC, and may be correspondingly configured according to the specific structure of the display panel.
With continued reference to fig. 3B and 3C, the first substrate 10 further includes:
a buffer layer 1011, the buffer layer 1011 being located on the substrate 111;
a thin film transistor 105 on the buffer layer 1011 and electrically connected to the data line 101 and the scan line;
a second insulating layer 1014 over the thin film transistor 105;
a touch electrode line 104 on the second insulating layer 1014;
a fourth insulating layer 1015 on the touch electrode line 104;
a plurality of common electrode blocks 121 on the fourth insulating layer 1015;
a third insulating layer 1016 on the plurality of common electrode blocks 121;
the pixel electrode 11 and the auxiliary electrode 13 are positioned on the third insulating layer 1016. The pixel electrode 11 may be electrically connected to the drain electrode of the thin film transistor 105 through a second via 182 passing through the second insulating layer 1014, the fourth insulating layer 1015, and the third insulating layer 1016. The plurality of common electrode blocks 121 are electrically connected to the corresponding touch electrode lines 104 through via holes penetrating the fourth insulating layer 1015 (not shown in fig. 3B). The auxiliary electrode 13 may be electrically connected to the common electrode block 121 through a via hole penetrating the third insulating layer 1016. The touch electrode line 104 may also be located on the third insulating layer 1016, and when the touch electrode line 104 and the auxiliary electrode 13 are both located on the third insulating layer 1016, the fourth insulating layer 1015 may be omitted.
An alignment layer (not shown) is disposed above the pixel electrode 11 and the auxiliary electrode 13, and is in contact with the liquid crystal layer.
Fig. 3D is a schematic structural diagram of another first substrate according to an embodiment of the disclosure. Referring to fig. 3D, the first substrate 10 includes:
a buffer layer 1011, the buffer layer 1011 being located on the substrate 111;
a thin film transistor 105 on the buffer layer 1011 and electrically connected to the data line 101 and the scan line;
a second insulating layer 1014 over the thin film transistor 105;
a plurality of common electrode blocks 121 are positioned on the second insulating layer 1014;
a third insulating layer 1016 on the plurality of common electrode blocks 121;
specifically, the semiconductor layer 15 including the first semiconductor region 151 and the second semiconductor region 152 is formed on the buffer layer 1011, the first semiconductor region 151 of intrinsic polysilicon is disposed at the center portion of the semiconductor layer 15, and the second semiconductor regions 152 of impurity-doped polysilicon are disposed at both sides of the first semiconductor region 151. The first semiconductor region 151 functions as a channel of a Thin Film Transistor (TFT), and the second semiconductor region 152 functions as a source region and a drain region of the TFT. A gate insulating layer 1012 of an inorganic insulating material such as silicon oxide and silicon nitride is formed on the semiconductor layer 15, a scan line and a gate electrode 17 are formed on the gate insulating layer 1012, and the gate electrode 17 is connected to the scan line. An intermediate insulating layer 1013 of an inorganic insulating material such as silicon oxide and silicon nitride is formed on the gate electrode 17 and the scan line, the intermediate insulating layer 1013 and the gate insulating layer 1012 having the semiconductor contact holes 181 leaking out of the second semiconductor region 152 of the semiconductor layer 15. The source electrode 153, the drain electrode 154, and the data line 101 are formed on the intermediate insulating layer 1013. The source electrode 153 and the drain electrode 154 are separated from each other on the same layer as the data line 101, and the pixel electrode 11 is connected to the drain electrode 154. The source electrode 153 and the drain electrode 154 are connected to the second semiconductor region 152 through the semiconductor contact hole 181, and the semiconductor layer 15, the gate insulating layer 1012, the gate electrode 17, the intermediate insulating layer 1013, the source electrode 153 and the drain electrode 154 constitute a Thin Film Transistor (TFT). The auxiliary electrode 13 and the touch electrode line 104 can be in direct contact, and a layer of the fourth insulating layer 1015 can be saved compared with the display panels shown in fig. 3B and 3C.
With reference to fig. 3D, the touch electrode line 104 is electrically connected to the common electrode block 121 through the third via 183 penetrating through the third insulating layer 1016, and the auxiliary electrode 13 can cover the touch electrode line 104 electrically connected thereto, so that when the pixel electrode 11 is formed, the touch electrode line 104 is already covered by the auxiliary electrode 13, which prevents the touch electrode line 104 from being damaged when the pixel electrode 11 is fabricated, for example, the touch electrode line 104 can be prevented from being corroded during the process of forming the pixel electrode 11 by etching, thereby improving the yield of the display panel. Furthermore, when the auxiliary electrode 13 and the pixel electrode are made of the same material and made of a transparent conductive material, such as an ITO material, the ITO material is less likely to be corroded during the etching process for forming the pixel electrode 11, such as by a solution used in the etching process, so that the touch electrode line 104 can be better prevented from being corroded, and the corrosion prevention effect is better.
Fig. 3E is a schematic top view of another first substrate according to an embodiment of the invention. Referring to fig. 3E, unlike the first substrate shown in fig. 3A, the first substrate further includes a virtual touch electrode line 106, and the virtual touch electrode line 106 is electrically connected to the common electrode block 121 through a via hole, and may be used to reduce the resistance of the common electrode block 121. The dummy touch electrode lines 106 are also located in the areas between adjacent pixel units, and are generally disposed on the same layer as the touch electrode lines 104. In the embodiment of the present invention, the auxiliary electrode 13 may overlap the touch electrode line 104 or the virtual touch electrode line 106 in a direction perpendicular to the substrate. The space of the black matrix 21 can be saved and the aperture ratio can be improved. The embodiment of the invention also provides a manufacturing method of the display panel, which can be used for manufacturing the display panel provided by any embodiment of the invention. The display panel can be formed by referring to fig. 1A, 1B and 1C. Fig. 4 is a schematic flow chart of a manufacturing method of a display panel according to an embodiment of the present invention, and referring to fig. 4, the manufacturing method of the display panel includes:
s410, forming a first substrate 10 and a second substrate 20, wherein forming the first substrate 10 includes: providing a substrate base plate 111; forming a plurality of data lines 101 and a plurality of scan lines 102 on a substrate 111, the plurality of data lines 102 and the plurality of scan lines 102 intersecting to define a plurality of pixel units 103; the pixel unit 103 comprises a common electrode 12 and a pixel electrode 11 which are arranged in a different layer insulation way; a plurality of auxiliary electrodes 13 are formed on the side of the common electrode 12 away from the substrate 111, the auxiliary electrodes 13 are located between adjacent pixel units 103, and the auxiliary electrodes 13 are formed to have the same potential as the common electrode 12.
S420, attaching the first substrate 10 and the second substrate 20, wherein a liquid crystal layer 30 is arranged between the first substrate 10 and the second substrate 20; a black matrix is formed on the first substrate 10 or the second substrate 20; the vertical projection of the auxiliary electrode 13 on the substrate 111 is located within the vertical projection of the black matrix 21 on the substrate 111.
Optionally, an embodiment of the present invention further provides another method for manufacturing a display panel, where the first substrate of the manufactured display panel may refer to fig. 1E, and specifically, before forming the plurality of auxiliary electrodes 13, the method further includes:
a first insulating layer 111 and a first via hole 131 on the first insulating layer 111 are formed, the common electrode 12 is exposed from the first via hole 131, and the formed auxiliary electrode 13 is connected to the common electrode 12 through the first via hole 131.
In the embodiment of the present invention, the pixel electrode 11 and the auxiliary electrode 13 may be formed in the same process, wherein the auxiliary electrode 13 and the pixel electrode 11 are disposed in the same layer and made of the same material.
Further, in the embodiment of the present invention, on the basis of the above embodiment, before forming the plurality of auxiliary electrodes, forming a plurality of touch electrode lines; at the moment, the public electrode is reused as a touch electrode, and the public electrode comprises a plurality of public electrode blocks arranged in a matrix; each touch electrode wire is electrically connected with a common electrode block; in the display stage, the touch electrode line transmits a common voltage signal for the common electrode block; in the touch control stage, the touch control electrode wire transmits a touch control signal for the common electrode block.
An embodiment of the present invention further provides another method for manufacturing a display panel, where the structure of the display panel formed by the manufacturing method may refer to fig. 3B and 3C, and in the manufacturing method, forming the first substrate includes:
providing a substrate base plate 111;
forming a buffer layer 1011 on the substrate base plate 111;
a thin film transistor 105 formed on the buffer layer 1011, the thin film transistor 105 being electrically connected to the data line and the scan line;
the gate of the thin film transistor 105 may be electrically connected to the scan line, and the source may be electrically connected to the data line.
A second insulating layer 1014 is formed over the thin film transistor 105,
forming a touch electrode line 104 on the second insulating layer 1014;
forming a fourth insulating layer 1015 on the touch electrode line 104;
forming a plurality of common electrode blocks 121 on the fourth insulating layer 1015;
forming a third insulating layer 1016 and a second via hole penetrating the second insulating layer 1014, the third insulating layer 1016, and the fourth insulating layer 1015 on the common electrode block 121, and forming a third via hole penetrating the fourth insulating layer 1015;
forming an auxiliary electrode 13 and a pixel electrode 11 on the third insulating layer 1016, wherein the pixel electrode 11 is electrically connected to the drain electrode of the thin film transistor 105 through a second via hole, and the touch electrode line 105 is electrically connected to the common electrode block 121 through a third via hole;
an alignment layer is formed over the pixel electrode 11 and the auxiliary electrode 13.
An embodiment of the present invention further provides another method for manufacturing a display panel, where the display panel is formed by referring to fig. 3D, and in the manufacturing method, forming the first substrate includes:
providing a substrate base plate 111;
forming a buffer layer 1011 on the substrate base plate 111;
a thin film transistor 105 formed on the buffer layer 1011, the thin film transistor 105 being electrically connected to the data line 101 and the scan line;
the gate of the thin film transistor 105 may be electrically connected to the scan line, and the source may be electrically connected to the data line 101.
A second insulating layer 1014 is formed over the thin film transistor 105,
forming a plurality of common electrode blocks 121 on the second insulating layer 1014;
forming a third insulating layer 1016 and a second via 182 penetrating the second insulating layer 1014 and the third insulating layer 1016 on the common electrode block, and forming a third via 183 penetrating the third insulating layer 1016;
forming a touch electrode line 104 on the third insulating layer 1016;
forming the auxiliary electrode 13 and the pixel electrode 11 on the third insulating layer 1016;
the pixel electrode 11 is electrically connected to the drain of the thin film transistor 105 through the second via 182, and the touch electrode line 104 is electrically connected to the common electrode block 121 through the third via 183;
after the auxiliary electrode 13 is formed, an alignment layer located above the pixel electrode 11 and the auxiliary electrode 13 is formed.
In the embodiment of the present invention, when the auxiliary electrode 13 covers the touch electrode line 104 electrically connected to the auxiliary electrode 13, after the touch electrode line 104 and the auxiliary electrode 13 are formed, the touch electrode line 104 is not corroded in the process of forming the pixel electrode 11 because the auxiliary electrode 13 is covered by the touch electrode line 104, thereby providing a yield of the display panel. And when the auxiliary electrode 13 and the pixel electrode 11 are formed using the same material and in the same process, process steps can be saved. In this case, the auxiliary electrode 13 and the pixel electrode 11 are made of the same material, and both of them can be made of a transparent conductive material, for example, an ITO material, and in the process of forming the pixel electrode 11 by etching, the ITO material is less likely to be corroded, for example, by a solution used in an etching process, so that the touch electrode line 104 can be better prevented from being corroded, and the corrosion prevention effect is better. And because the material for forming the auxiliary electrode 13 and the pixel electrode covers the touch electrode line 104, the touch electrode line 104 is not corroded during the process of forming the auxiliary electrode 13 and the pixel electrode 11 in the etching process.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A display panel is characterized by comprising a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate; the first substrate or the second substrate is provided with a black matrix;
the first substrate includes:
a substrate base plate; a plurality of data lines and a plurality of scan lines on the substrate, the plurality of data lines and the plurality of scan lines crossing to define a plurality of pixel units; the pixel unit comprises a common electrode and a pixel electrode which are arranged in a different-layer insulation manner;
a plurality of auxiliary electrodes located between adjacent pixel units and on a side of the common electrode away from the substrate, wherein the auxiliary electrodes and the common electrode have the same potential; the left pixel electrode of the auxiliary electrode is a voltage corresponding to a negative frame, and the right pixel electrode of the auxiliary electrode is a voltage corresponding to a positive frame;
wherein the vertical projection of the auxiliary electrode on the substrate base plate is positioned in the vertical projection of the black matrix on the substrate base plate;
the touch control device also comprises a plurality of touch control electrode wires, the public electrodes are multiplexed into touch control electrodes, and the public electrodes comprise a plurality of public electrode blocks arranged in a matrix;
each touch electrode wire is electrically connected with one common electrode block;
at least part of the auxiliary electrode is electrically connected with the touch electrode wire;
the first substrate further includes:
a third insulating layer on the plurality of common electrode blocks;
the pixel electrode, the auxiliary electrode and the touch electrode line are positioned on the third insulating layer;
the touch electrode wire is electrically connected with the common electrode block through a third through hole penetrating through the third insulating layer;
the auxiliary electrode is in direct contact with the touch electrode wire;
the auxiliary electrode covers the touch electrode wire which is electrically connected with the auxiliary electrode;
the auxiliary electrode and the pixel electrode are arranged on the same layer, the auxiliary electrode and the pixel electrode are formed by the same material in the same process, and the auxiliary electrode and the pixel electrode are made of ITO materials.
2. The display panel according to claim 1, wherein the auxiliary electrode is disposed between two adjacent columns of the pixel units and/or two adjacent rows of the pixel units.
3. The display panel according to claim 1, wherein the auxiliary electrodes between two adjacent rows of pixel units are arranged in segments along the extending direction of the scanning lines; and/or the presence of a gas in the gas,
and the auxiliary electrodes positioned between two adjacent columns of the pixel units are arranged in a segmented mode along the extending direction of the data line.
4. The display panel according to claim 1,
in a display stage, the touch electrode line transmits a common voltage signal to the common electrode block; and in a touch control stage, the touch control electrode wire transmits a touch control signal to the common electrode block.
5. The display panel according to claim 4, wherein the first substrate further comprises:
the buffer layer is positioned on the substrate base plate;
a thin film transistor on the buffer layer and electrically connected to the data line and the scan line;
a second insulating layer on the thin film transistor;
the plurality of common electrode blocks are positioned on the second insulating layer;
the pixel electrode is electrically connected with the drain electrode of the thin film transistor through a second via hole penetrating through the second insulating layer and the third insulating layer;
an alignment layer over the pixel electrode and the auxiliary electrode.
6. A method of manufacturing a display panel, comprising: forming a first substrate and a second substrate, and attaching the first substrate and the second substrate, wherein a liquid crystal layer is arranged between the first substrate and the second substrate; a black matrix is formed on the first substrate or the second substrate;
the forming the first substrate includes:
providing a substrate base plate;
forming a plurality of data lines and a plurality of scanning lines on the substrate, wherein the plurality of data lines and the plurality of scanning lines intersect to define a plurality of pixel units; the pixel unit comprises a common electrode and a pixel electrode which are arranged in a different-layer insulation manner;
forming a plurality of auxiliary electrodes on one side of the common electrode, which is far away from the substrate base plate, wherein the auxiliary electrodes are positioned between the adjacent pixel units, and the formed auxiliary electrodes and the common electrode have the same potential; the left pixel electrode of the auxiliary electrode is a voltage corresponding to a negative frame, and the right pixel electrode of the auxiliary electrode is a voltage corresponding to a positive frame;
wherein the vertical projection of the auxiliary electrode on the substrate base plate is positioned in the vertical projection of the black matrix on the substrate base plate;
before forming the plurality of auxiliary electrodes, forming a plurality of touch electrode lines;
the public electrode is multiplexed as a touch electrode and comprises a plurality of public electrode blocks arranged in a matrix manner;
each touch electrode wire is electrically connected with one common electrode block;
at least part of the auxiliary electrode covers and contacts the touch electrode wire;
before forming the auxiliary electrode, the method further comprises:
forming a third insulating layer on the common electrode block and forming a third via hole penetrating through the third insulating layer; the touch electrode wire is electrically connected with the common electrode block through the third via hole;
forming the pixel electrode on the third insulating layer;
forming a plurality of auxiliary electrodes on a side of the common electrode away from the substrate includes:
forming the auxiliary electrode on the third insulating layer;
forming a plurality of touch electrode lines, including:
forming the touch electrode line on the third insulating layer; and forming the pixel electrode and the auxiliary electrode in the same process, wherein the auxiliary electrode and the pixel electrode are arranged in the same layer and are made of the same material, and the auxiliary electrode and the pixel electrode are made of ITO material.
7. The manufacturing method according to claim 6, wherein in a display stage, the touch electrode lines transmit common voltage signals to the common electrode blocks; and in the touch control stage, the touch control electrode wire transmits a touch control signal for the common electrode block.
8. The manufacturing method according to claim 7, further comprising, before forming the auxiliary electrode:
forming a buffer layer on the substrate base plate;
forming a thin film transistor on the buffer layer, the thin film transistor being electrically connected to the data line and the scan line;
forming a second insulating layer on the thin film transistor, wherein the formed common electrode block is on the second insulating layer;
forming a second via hole penetrating through the second insulating layer and the third insulating layer; the pixel electrode is electrically connected with the drain electrode of the thin film transistor through the second through hole;
further comprising, after forming the auxiliary electrode:
forming an alignment layer over the pixel electrode and the auxiliary electrode.
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| CN208207465U (en) | 2018-06-04 | 2018-12-07 | 京东方科技集团股份有限公司 | array substrate and display device |
| CN108897176A (en) * | 2018-09-07 | 2018-11-27 | 武汉华星光电技术有限公司 | array substrate and liquid crystal display |
| CN111240105B (en) * | 2020-02-25 | 2021-08-24 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN111679518B (en) * | 2020-06-30 | 2021-08-03 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111796460A (en) * | 2020-08-12 | 2020-10-20 | 成都中电熊猫显示科技有限公司 | Liquid crystal display panel, liquid crystal display device and display panel driving method |
| CN112732123A (en) * | 2021-02-26 | 2021-04-30 | 业成科技（成都）有限公司 | Touch panel and touch display device using same |
| CN113671749B (en) * | 2021-09-07 | 2023-03-31 | 深圳市华星光电半导体显示技术有限公司 | Method for reducing afterimage in image |
| CN114815351B (en) * | 2022-03-30 | 2024-04-12 | 绵阳惠科光电科技有限公司 | Display panel and display device |
| CN114967245A (en) * | 2022-04-07 | 2022-08-30 | 广州华星光电半导体显示技术有限公司 | Display panel and display device |
| CN114927111B (en) * | 2022-04-21 | 2023-10-24 | 滁州惠科光电科技有限公司 | Substrate, display panel and electronic equipment thereof |
| WO2024000301A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method therefor, and display device |
| CN115981059B (en) * | 2023-03-20 | 2023-06-23 | 惠科股份有限公司 | Liquid crystal display panel and liquid crystal display |
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