CN110208994B

CN110208994B - Liquid crystal display panel and display device

Info

Publication number: CN110208994B
Application number: CN201910573042.7A
Authority: CN
Inventors: 李东华; 魏晓丽; 周秀峰; 沈柏平
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2021-08-31
Anticipated expiration: 2039-06-28
Also published as: CN110208994A

Abstract

The embodiment of the application provides a liquid crystal display panel and a display device, the display panel comprises a display area and a hollow functional area, and the display area is arranged around the hollow functional area. And a first transition area is arranged between the hollow functional area and the display area and surrounds the hollow functional area. The display panel further comprises a data signal line and a scanning signal line, and the data signal line and the scanning signal line are arranged around the hollow functional area in the first transition area. In the first transition area, the vertical projection of the data signal line on the first plane and the vertical projection of the scanning signal line on the first plane are overlapped with the plurality of coincident points. The first plane is a plane where the surface of the light-emitting side of the liquid crystal display panel is located, and the at least one coincident point is located in the vertical projection of the auxiliary metal electrode on the first plane. According to the embodiment of the application, the auxiliary metal electrode is arranged at the position where the data signal line and the scanning signal line are overlapped, so that the load of the scanning signal line is increased, uneven display is avoided, and the display effect is improved.

Description

Liquid crystal display panel and display device

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of display, in particular to a liquid crystal display panel and a display device.

[ background of the invention ]

A conventional display screen includes a display area and a non-display area, the non-display area being disposed around the display area. And functional modules such as a camera, a receiver, a microphone and the like are arranged in the non-display area.

Along with the continuous development of comprehensive screen technique, the area in the non-display area of display screen is littleer and more, can't provide sufficient space and hold the function module, sets up the function module in the display area and becomes a trend.

But move the functional module to the display area in, the fretwork functional area for holding the functional module does not show the image, does not also have the sub-pixel that is used for showing the image yet for corresponding scanning signal line compares with other scanning signal lines, and the load is less, causes to show inhomogeneously.

[ summary of the invention ]

In view of this, the embodiment of the present application provides a liquid crystal display panel and a display device, in which an auxiliary metal electrode is disposed at a position where a data signal line and a scan signal line of a first transition region coincide with each other, so as to increase a coupling capacitance between the scan signal line and the data signal line, thereby increasing a load of the scan signal line, avoiding uneven display, and improving a display effect.

In one aspect, an embodiment of the present application provides a liquid crystal display panel, including:

the display device comprises a display area and a hollow functional area, wherein the hollow functional area is used for accommodating a functional module, and the display area is arranged around the hollow functional area;

the display device comprises a data signal line and a scanning signal line, wherein the data signal line extends along a first direction in the display area;

the scanning signal line extends along a second direction, and the first direction and the second direction are intersected;

a first transition area is arranged between the hollow functional area and the display area, and surrounds the hollow functional area;

in the first transition area, the data signal line and the scanning signal line are arranged around the hollow functional area;

in the first transition area, the vertical projection of the data signal line on a first plane is overlapped with the vertical projection of the scanning signal line on the first plane at a plurality of coincident points; the first plane is a plane where the surface of the light-emitting side of the liquid crystal display panel is located;

at least one of the coincident points is located within a perpendicular projection of the auxiliary metal electrode on the first plane.

The embodiment of the application provides a liquid crystal display panel and a display device, sets up the fretwork functional area in the display area, holds the function module. In order to avoid the functional module, normal display of the display area is not influenced at the same time, a first transition area surrounding the hollow functional area is arranged between the hollow functional area and the display area, and a data signal line and a scanning signal line used for transmitting display signals are arranged. In order to increase the load of the scanning signal line in the first transition area, the auxiliary metal electrode is correspondingly arranged in the first transition area, and the coupling capacitance between the scanning signal line and the data signal line is increased, so that the load of the scanning signal line is increased, uneven display is avoided, and the display effect is improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an lcd panel according to an embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of region R1 of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the dotted line A-A' in FIG. 2;

FIG. 4 is another schematic cross-sectional view taken along the dashed line A-A' in FIG. 2;

FIG. 5 is another enlarged schematic view of the region R1 in FIG. 1;

FIG. 6 is a schematic cross-sectional view taken along the dashed line A-A' in FIG. 5;

FIG. 7 is a further enlarged schematic view of region R1 of FIG. 1;

FIG. 8 is a schematic cross-sectional view taken along dotted line A-A' of FIG. 7;

FIG. 9 is a further enlarged schematic view of region R1 of FIG. 1;

FIG. 10 is a schematic cross-sectional view taken along dotted line A-A' of FIG. 9;

fig. 11 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present disclosure;

FIG. 12 is a schematic cross-sectional view taken along the line B-B' of FIG. 2;

FIG. 13 is another schematic cross-sectional view taken along the dashed line B-B' in FIG. 2;

fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present application.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.

It should be understood that although the terms first, second, third, etc. may be used to describe the display regions in the embodiments of the present application, the display regions should not be limited to these terms. These terms are only used to distinguish the display areas from each other. For example, the first display region may also be referred to as a second display region, and similarly, the second display region may also be referred to as a first display region without departing from the scope of the embodiments of the present application.

In order to more clearly describe the liquid crystal display panel provided in the embodiments of the present application, a structure of the liquid crystal display panel is described below.

The liquid crystal display panel comprises a display area and a non-display area, wherein the non-display area is provided with a functional module, and the display area displays images.

The display area comprises sub-pixels SP which are arranged in an array, each sub-pixel SP is correspondingly provided with a thin film transistor, and the array can be divided into a row direction and a column direction. In order to drive the sub-pixels SP arranged in the array to display a picture, a data signal line and a scanning signal line are further arranged in the display area, and the scanning signal line and the data signal line respectively extend along two directions of the array.

The following exemplifies how the scanning signal lines and the data signal lines control the subpixels SP arranged in the array to display an image.

M rows and N columns of subpixels SP are arranged in the display area, M rows and N columns of thin film transistors are correspondingly arranged, the M rows are marked as { X1, X2, … …, XM }, and the N columns are marked as { Y1, Y2, … …, YN }, so that the subpixels SP in the A row and the B column can be represented by (XA, XB), wherein M, N, A and B are positive integers, A is more than or equal to 1 and less than or equal to M, and B is more than or equal to 1 and less than or equal to N.

The scanning signal lines extend in the row direction and are electrically connected to the gates of the thin film transistors corresponding to the respective sub-pixels SP, and the data signal lines extend in the column direction and are electrically connected to the source electrodes of the thin film transistors corresponding to the respective sub-pixels SP.

The thin film transistor has an on-state and an off-state, and the state of the thin film transistor is controlled by the gate. The gate electrode is similar to a switch of a thin film transistor, and when a high voltage is transmitted to the gate electrode by the scanning signal line, the gate electrode is in an on state, and an operating current is generated between the source electrode and the drain electrode, allowing a data signal transmitted by the data signal line to be transmitted to the sub-pixel. When the scanning signal line stops providing high voltage to the grid electrode, the grid electrode is in an off state, the working current between the source electrode and the drain electrode disappears, and the data signal transmitted by the data signal line cannot be transmitted to the sub-pixel.

When the sub-pixels SP display images, the scanning signal lines transmit scanning signals, the scanning signals can sequentially control the gates of the thin film transistors in each row to be in an on state, and when only the thin film transistors in one row are in the on state at the same time, for example, when the gates of the XA row are in the on state, the gates of the { X1, … …, XA-1, XA +1, … …, XM } rows are in an off state. When XA changes all the way from X1 to XM, one scan of the entire array is completed.

Corresponding to the scanning process of the scanning signal line, the data signal line transmits a data signal, drives the thin film transistor with the grid electrode in the on state to work, and transmits the data signal to the corresponding sub-pixel SP through the thin film transistor with the grid electrode in the on state, so that the corresponding sub-pixel SP emits light. For the thin film transistors in different rows, the data signals sent by the data signal lines change accordingly, so that the sub-pixels SP in different rows emit different lights. When the scanning signal finishes one scanning to the whole array, the data signal line correspondingly transmits different data signals to each thin film transistor in the whole array.

Due to the vision retention of the human eye, namely, the image seen by the human eye stays in the brain for about 1/24s, when the scanning period corresponding to the scanning signal is less than 1/24s, the human eye can see the image commonly displayed by the sub-pixels SP in the whole array.

It should be noted that, a backlight module is disposed on a side of the liquid crystal display panel away from the light exit side, and a light source on the backlight module emits white light with the same intensity, and the white light passes through the liquid crystal display panel, so that the liquid crystal display panel can emit light.

The thin film transistor controls the sub-pixels SP to display images on the basis of controlling the sub-pixels SP to emit different lights by the change of the electric field. Specifically, the thin film transistor includes a pixel electrode and a common electrode between which an electric field is formed so that liquid crystal molecules in a liquid crystal layer of the liquid crystal display panel rotate. It can be understood that the electric fields formed by the thin film transistors corresponding to different sub-pixels SP are different, so that the white light with the same intensity emitted by the backlight module passes through the liquid crystal molecules corresponding to different sub-pixels SP, and the intensity of the white light corresponding to different sub-pixels SP is different. Further, different sub-pixels SP correspond to different color filter units, and the white light passing through the liquid crystal molecules passes through the color filter units of different colors to become light with different intensities and different colors.

The adjacent sub-pixels SP form a pixel PX, and the sub-pixels SP included in each pixel PX emit light of different intensities and different colors, and form monochromatic light after mixing the light, so that the entire pixel PX emits the monochromatic light.

For a conventional liquid crystal display panel, the tfts correspond to the sub-pixels SP distributed in an array, and the number of tfts in each row is the same. That is to say, the number of the thin film transistors electrically connected to each scanning signal line is the same, and when the scanning signals drive the thin film transistors in different rows to be in an on state, the number of the thin film transistors to be driven is the same, so that the load of each scanning signal line is also the same.

When the functional module is arranged in the display area, a hollow-out functional area needs to be arranged in the display area of the liquid crystal display panel for arranging the functional module, and the sub-pixel SP and a thin film transistor for controlling the sub-pixel SP to display images are not arranged in the hollow-out functional area and partial areas around the hollow-out functional area.

It can be understood that, the number of the electrically connected thin film transistors is less due to the existence of the hollow functional region, and the load of the part of the scanning signal line is also less.

In the process of scanning the whole display panel, the total voltage of the scanning signals provided by the liquid crystal display panel to each row of scanning signal lines is the same, and the scanning signals are electrically connected with the thin film transistors with small number, so that the scanning voltage distributed on each thin film transistor is large for the scanning signal lines with small load, the working current between the source electrode and the drain electrode is large, and the intensity of the data signals received by the sub-pixels SP is large.

The operating currents of the thin film transistors corresponding to the sub-pixels SP in different rows are different for the whole liquid crystal display panel, which causes the luminance of the sub-pixels SP in different rows to be non-uniform, and causes display to be non-uniform.

In order to solve the above problem, an embodiment of the present application provides a liquid crystal display panel. Fig. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present application. Fig. 2 is an enlarged view of region R1 in fig. 1. Fig. 3 is a schematic cross-sectional view taken along a dashed line a-a' in fig. 2, and it should be noted that, for convenience of description, only two data signal lines and two scanning signal lines are shown in fig. 3, which is not intended to limit the number of data signal lines and scanning signal lines of the liquid crystal display panel according to the embodiment of the present application.

As shown in fig. 1-3, the liquid crystal display panel includes a display area 11 and a hollow functional area 12, the hollow functional area 12 is used for accommodating the functional module, and the display area 11 is disposed around the hollow functional area 12.

The liquid crystal display panel includes data signal lines 131 and scanning signal lines 132, and in the display region 11, the data signal lines 131 are arranged to extend in a first direction, and the scanning signal lines 132 are arranged to extend in a second direction. Wherein the first direction intersects the second direction. Optionally, the first direction and the second direction are a column direction and a row direction in the array arrangement.

Between the hollow functional region 12 and the display region 11, a first transition region 13 is disposed, and the first transition region 13 surrounds the hollow functional region 12. In the first transition region 13, the data signal lines 131 and the scan signal lines 132 are disposed around the hollow functional region 12. In the first transition area 13, the vertical projection of the data signal line 131 on the first plane overlaps the vertical projection of the scan signal line 132 on the first plane at a plurality of coincidence points. The first plane is a plane where the light-emitting side surface of the liquid crystal display panel is located.

Note that, since the data signal lines 131 and the scanning signal lines 132 are signal lines having a certain width, the corresponding vertical projections also have a certain width. Thus, coincident points where perpendicular projections overlap are not mathematically non-sized points, but are coincident regions.

As shown in fig. 2, the multiple vertical projection overlapping points of the data signal lines 131 and the scanning signal lines 132 are located within the dashed line frame 133 in the figure, and therefore, the auxiliary metal electrodes 134 are disposed within the dashed line frame 133 in the liquid crystal display panel provided in the embodiment of the present application.

In the lcd panel, the data signal lines 131 and the scanning signal lines 132 drive the tfts by transmitting voltage signals, so that coupling capacitances are formed at the projection overlapping points of the data signal lines 131 and the scanning signal lines 132, and since the vertical projection overlapping points of the data signal lines 131 and the scanning signal lines 132 are independent points, a coupling capacitance is generated at each overlapping point.

Therefore, in order to increase the coupling capacitance between the data signal line 131 and the scan signal line 132, at least one coincident point needs to be located inside the perpendicular projection of the auxiliary metal electrode 134 on the first plane.

The liquid crystal display panel provided by the embodiment of the application comprises a display area 11, a hollow functional area 12 and a first transition area 13. The subpixels SP are arranged in an array in the display region 11, and the subpixels SP are driven to emit light of different colors and different intensities by transmitting data signals and scanning signals to the corresponding thin film transistors of the subpixels SP through the data signal lines 131 and the scanning signal lines 132 extending in the first direction and the second direction, respectively.

The hollow-out functional region 12 is used for accommodating the functional module 410, and does not have a sub-pixel SP or a corresponding thin film transistor, so that the data signal line 131 and the scan signal line 132 are disposed around the hollow-out functional region 12 in the first transition region 13 around the hollow-out functional region 12.

In the hollow functional region 12 and the first transition region 13, the sub-pixels SP are not disposed, and the thin film transistors for driving the sub-pixels SP to emit light are not correspondingly disposed, so that the scanning signal lines 132 passing through the first transition region 13 have a smaller load than the scanning signal lines 132 not passing through the first transition region 13, thereby affecting the display effect of the sub-pixels SP located in the display region 11 and driven by the scanning signal lines 132.

In the first transition region 13, the data signal lines 131 and the scan signal lines 132 cross each other due to the traces, and coupling capacitances are formed at the crossing positions, and the generation of the coupling capacitances can increase the load of the scan signal lines 132. In order to increase the load of the scan signal line 132 passing through the first transition region 13, the auxiliary metal electrode 13 is correspondingly disposed at the first transition region 13 to increase the coupling capacitance between the data signal line 131 and the scan signal line 132, thereby increasing the load of the scan signal line 132 passing through the first transition region 13. The load of the scanning signal line 132 passing through the first transition region 13 is approximately equal to or even equal to the load of the scanning signal line 132 not passing through the first transition region 13, so that the scanning voltage distributed to the thin film transistor corresponding to the sub-pixel SP located in the display region 11 and driven by the scanning signal line 132 passing through the first transition region 13 is approximately equal to or even equal to the scanning voltage distributed to the thin film transistor corresponding to the sub-pixel SP not driven by the scanning line 132 passing through the first transition region 13, and thus the display of the sub-pixel SP is uniform, and the display effect is improved.

Optionally, all of the plurality of coincident points are located within a vertical projection of the auxiliary metal electrode on the first plane. When the plurality of coincident points are all located within the vertical projection of the auxiliary metal electrode 134 on the first plane, the coupling capacitance at each coincident point can be increased, so that the load of the scanning signal line 132 located in the first transition region is further increased.

As shown in fig. 3, the liquid crystal display panel further includes a first metal layer M1, a second metal layer M2, and a third metal layer M3, the first metal layer M1 is patterned to form the data signal lines 131, the second metal layer M2 is patterned to form the scan signal lines 132, and the third metal layer M3 is patterned to form the auxiliary metal electrodes 134. The second metal layer M2 is located between the first metal layer M1 and the third metal layer M3.

Based on the foregoing description of the image display principle of the liquid crystal display panel, it can be known that the thin film transistors arranged in an array in the liquid crystal display panel operate to make the corresponding sub-pixels SP emit light, and the thin film transistors include a source electrode 111 and a drain electrode 111 (made of the same material and manufactured by the same process, and herein, both are denoted by 111), a gate electrode 112, and a semiconductor portion 114. Among them, the source and drain electrodes 111 and the data signal line 131 may be patterned by the metal layer M1, and the gate electrode 112 and the scan signal line 132 may be patterned by the metal layer M2.

When the thin film transistor is in an on state, a hole current is generated in the semiconductor portion 114 as a leakage current, so that a working current can be generated between the source electrode and the drain electrode to achieve conduction, and a data signal transmitted by the data signal line 131 is transmitted to a pixel electrode of the sub-pixel, so that the corresponding sub-pixel SP emits light.

In the display panel provided by the present application, the data signal line 131 and the source and drain electrodes 111 are formed in the same patterning step by the first metal layer M1, and the scanning signal line 132 and the gate 112 are formed in the same patterning step by the second metal layer M2, so that the manufacturing process steps of the liquid crystal display panel can be reduced, and the MASK can be saved.

It should be noted that the semiconductor portion 114 of the thin film transistor generates a large number of electron-hole pairs under the action of light, so that the operating current is increased sharply, and the intensity of the data signal transmitted to the sub-pixel SP is too high. When the gate 112 is in an off state, a small amount of leakage current still forms in the semiconductor portion 114 under the action of light, so that the source/drain electrodes 111 are turned on, and the data signal is still transmitted to the sub-pixel SP, thereby causing signal crosstalk. The liquid crystal display panel provided by the present application is passive-type, and the light source provided by the backlight module is needed to make the sub-pixel SP emit light, and the light of the backlight module will irradiate the semiconductor portion 114.

Fig. 4 is another schematic cross-sectional view along the dashed line a-a' in fig. 2. As shown in fig. 4, in order to prevent the semiconductor portion 114 from being irradiated with light emitted from the backlight module, the liquid crystal display panel further includes a light-shielding portion 113 provided corresponding to the semiconductor portion 114, and a vertical projection of the semiconductor portion 114 on the first plane is located within a vertical projection of the light-shielding portion 113 on the first plane. Therefore, the light shielding part 113 can shield the semiconductor part 114 in the direction perpendicular to the first plane, so that light emitted by the backlight module is prevented from irradiating the semiconductor part 114, and the reliability of the thin film transistor on data signal transmission is improved.

Since the light shielding portion 113 is located at a side of the gate electrode 112 away from the source and drain electrodes 111, i.e., at a side of the second metal layer M2 away from the first metal layer M1, the third metal layer M3 for patterning the auxiliary metal electrode 134 is also located at a side of the second metal layer M2 away from the first metal layer M1. In order to simplify the steps of the lcd panel manufacturing process, the light-shielding portion 113 and the auxiliary metal electrode 134 may be formed by patterning the third metal layer M3, and only the MASK for patterning the third metal layer M3 needs to be opened, without increasing the steps of the manufacturing process.

As shown in fig. 2, the data signal line 131 in the liquid crystal display panel according to the embodiment of the present disclosure includes a first sub data line 1311 and a second sub data line 1312. The first sub-data line 1311 is disposed around the hollow functional area 12, and the second sub-data line 1312 extends along the first direction and is used for connecting the data signal lines in the display area 11.

As shown in fig. 2 and 3, the vertical projection of the second sub-data line 1312 on the first plane overlaps with the vertical projection of the scanning signal line 132 on the first plane to form a plurality of overlapping points. The vertical projection of the first sub-data line 1311 on the first plane is located between the vertical projection of the scanning signal line 132 on the first plane and the vertical projection of the hollow functional area 12 on the first plane, and is not overlapped with the vertical projection of the scanning signal line 132 on the first plane.

Since the plurality of overlapping points are a plurality of strips extending along the first direction, the auxiliary metal electrode 134 may be a plurality of strip-shaped metal electrode blocks extending along the first direction.

In addition, referring to fig. 5 and fig. 6, fig. 5 is another enlarged schematic view of the region R1 in fig. 1. Fig. 6 is a schematic cross-sectional view taken along the dotted line a-a' in fig. 5. As shown in fig. 5 and 6, considering that the above-mentioned multiple coincident points may include two regions in position, namely, the dashed boxes 133 in fig. 5, accordingly, the auxiliary metal electrodes 134 are disposed within the dashed boxes 133, namely, only one auxiliary metal electrode 134 is disposed within each dashed box 133, so that the vertical projection of the auxiliary metal electrode 134 on the first plane can completely cover the above-mentioned multiple coincident points. Because only one auxiliary metal electrode 134 is arranged in one dotted line frame 133, the number of the auxiliary electrodes is small, and the manufacturing process is simple

In the two liquid crystal display panels, the data signal lines 131 and the scanning signal lines 132 in the first transition area 13 are routed in such a way that the vertical projection of the first sub-data lines 1311 on the first plane is located between the vertical projection of the scanning signal lines 132 on the first plane and the vertical projection of the hollow functional area 12 on the first plane, and the vertical projection of the scanning signal lines 132 on the first plane is not overlapped. The vertical projection of the second sub-data line 1312 on the first plane overlaps the vertical projection of the scanning signal line 132 on the first plane to form a plurality of coincident points.

In the embodiment of the present application, another routing manner is further provided, in which a vertical projection of the first sub-data line 1311 on the first plane is overlapped with a vertical projection of the scanning signal line 132 on the first plane to form a plurality of coincident points.

Accordingly, referring to fig. 7 and 8, fig. 7 is another enlarged schematic view of the region R1 in fig. 1. Fig. 8 is a schematic cross-sectional view taken along the dashed line a-a' in fig. 7. As shown in fig. 7, the vertical projection of the first sub-data line 1311 on the first plane and the overlap region with the vertical projection of the scanning signal line 132 on the first plane are located within the dashed box 133.

It can be understood that, since the auxiliary metal electrode 134 is added to the liquid crystal display panel provided in the embodiment of the present application to increase the coupling capacitance between the data signal line 131 and the scanning signal line 132, when the vertical projection of the data signal line 131 on the first plane is overlapped with the vertical projection of the scanning signal line 132 on the first plane by a large area, the shape and size of the auxiliary metal electrode 134 may also be correspondingly set. Meanwhile, the space occupied by the data signal lines 131 and the scanning signal lines 132 in the first transition region 13 can be reduced, and the display area of the liquid crystal display panel can be increased.

In addition, referring to fig. 9 and 10, fig. 9 is a further enlarged schematic view of the region R1 in fig. 1.

Fig. 10 is a schematic cross-sectional view taken along the dashed line a-a' in fig. 9. As shown in fig. 8, the vertical projection of the data signal line 131 on the first plane overlaps with the vertical projection of the scanning signal line 132 on the first plane to cover almost the entire first transition region 13, and thus the auxiliary metal electrode 134 may be disposed within the dashed-line box 133 in fig. 8, so that the auxiliary metal electrode 134 is a metal electrode block.

It can be understood that, when the auxiliary metal electrode 134 covers the whole first transition region 13, the auxiliary metal electrode 134 can also block the light emitted by the backlight module, so as to avoid light leakage in the first transition region 13.

The applicant has found that after the load detection is performed on the scanning signal lines 132 of the four liquid crystal display panels, the load can be increased by at least 24% by providing the auxiliary metal electrodes 134.

In addition, the liquid crystal display panel needs to be provided with a ground wire to conduct away static electricity, and damage to components in the liquid crystal display panel caused by static electricity is avoided.

Fig. 11 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present application. As shown in fig. 11, the liquid crystal display panel according to the embodiment of the present application further includes a second transition region 14, and the second transition region 14 is disposed around the display region 11.

The first ground GND1 is disposed in the first transition region 13, and the first ground GND1 is disposed around the hollow functional region 12. The second ground GND2 is disposed at the second transition area 14, the second ground GND2 is disposed around the display area 11, and since the second ground GND2 is located at the second transition area 14, the second transition area 14 includes a terminal portion of the liquid crystal display panel, the second ground GND2 can be directly grounded at the terminal portion, and the first ground GND1 is grounded by being electrically connected to the second ground GND 2.

Therefore, the first ground wire GND1 can conduct away static electricity generated by the hollow functional area 12 through the second ground wire GND2, and the second ground wire GND2 can conduct away static electricity around the display area 11, so as to avoid damage of the static electricity to components in the liquid crystal display panel.

It should be noted that, the functional module in the liquid crystal display panel that this application real-time example provided can be image acquisition module, sound acquisition module, infrared detection module, fingerprint identification module, one or more in the earphone module. The method and the device can be set correspondingly according to actual requirements, and the method and the device are not limited in the embodiment of the application.

Further, the liquid crystal display panel provided in the present application may have different film structures in the hollow functional region 12, and for convenience of description, the following description is based on the liquid crystal display panel shown in fig. 2, but the film structure of the hollow functional region 12 described herein may be used for all the liquid crystal display panels described above, and the embodiment of the present application does not limit this.

Fig. 12 is a schematic cross-sectional view taken along the dashed line B-B' in fig. 2. As shown in fig. 12, the liquid crystal display panel further includes a color filter substrate 210 and an array substrate 220, the color filter substrate 210 includes a first substrate 211, and the array substrate 220 includes a second substrate 221. The first substrate 211 is at least located in the display area 11, the first transition area 13 and the hollow-out functional area 12, and the second substrate 221 is at least located in the display area 11, the first transition area 13 and the hollow-out functional area 12.

The backlight module 310 corresponding to the hollow functional region 12 is hollow for accommodating the functional module 410, the hollow functional region 12 retains the first substrate 211 and the second substrate 221, the mechanical strength of the hollow functional region 12 can be enhanced, and the hollow functional region 12 is not easy to deform when external pressure is applied.

Fig. 13 is another schematic cross-sectional view taken along the dashed line B-B' in fig. 2. As shown in fig. 13, the hollow functional region 11 penetrates through the liquid crystal display panel along a direction perpendicular to the first plane.

The hollow functional area 12 penetrates through the liquid crystal display panel along the direction perpendicular to the first plane, is used for accommodating the functional module 410, can reduce the shielding of the film layer of the liquid crystal display panel on the functional module 410, and improves the effect of receiving and sending corresponding signals of the functional module 410. For example, the functional module 410 is an image capturing module, and then an external image received by the image capturing module becomes clear and bright without being blocked by a film layer of the liquid crystal display panel.

An embodiment of the present application further provides a display device, as shown in fig. 12, fig. 12 is a schematic structural diagram of the display device provided in the embodiment of the present application, and the display device includes the above-mentioned liquid crystal display panel. The specific structure of the liquid crystal display panel has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 14 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.

Because the display device that this application embodiment provided includes above-mentioned liquid crystal display panel, consequently, adopt this display device, set up the fretwork function district in the display area, hold the function module. In order to avoid the functional module, normal display of the display area is not influenced at the same time, a first transition area surrounding the hollow functional area is arranged between the hollow functional area and the display area, and a data signal line and a scanning signal line used for transmitting display signals are arranged. In order to increase the load of the scanning signal line in the first transition area, the auxiliary metal electrode is correspondingly arranged in the first transition area, and the coupling capacitance between the scanning signal line and the data signal line is increased, so that the load of the scanning line is increased, uneven display is avoided, and the display effect is improved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A liquid crystal display panel, comprising:

an auxiliary metal electrode is arranged in the first transition region;

2. The liquid crystal display panel according to claim 1, further comprising a first metal layer patterned to form the data signal lines, a second metal layer patterned to form the scan signal lines, and a third metal layer patterned to form the auxiliary metal electrodes;

wherein the second metal layer is located between the first metal layer and the third metal layer.

3. The liquid crystal display panel according to claim 2, further comprising a plurality of thin film transistors arranged in an array, the thin film transistors comprising a semiconductor portion;

the liquid crystal display panel also comprises a light shielding part which is arranged corresponding to the semiconductor part, and the vertical projection of the semiconductor part on the first plane is positioned in the vertical projection of the light shielding part on the first plane;

the light shielding part and the auxiliary metal electrode are formed by patterning the third metal layer.

4. The liquid crystal display panel of claim 1, wherein the auxiliary metal electrode comprises one or more metal electrode blocks.

5. The liquid crystal display panel according to claim 1,

in the first transition area, the data signal line comprises a first sub data line and a second sub data line;

the first sub data line is arranged around the hollowed-out functional area;

the second sub data lines extend along the first direction and are used for being connected with data signal lines located in the display area.

6. The liquid crystal display panel according to claim 5,

and the vertical projection of the second sub data line on the first plane is overlapped with the vertical projection of the scanning signal line on the first plane to form the multiple coincident points.

7. The liquid crystal display panel according to claim 5,

and the vertical projection of the first sub data line on the first plane is overlapped with the vertical projection of the scanning signal line on the first plane to form the multiple coincident points.

8. The liquid crystal display panel according to claim 1,

the plurality of coincident points are all located within a perpendicular projection of the auxiliary metal electrode on the first plane.

9. The liquid crystal display panel according to claim 1, further comprising:

a second transition region disposed around the display region;

a first ground wire is arranged in the first transition area;

the first ground wire is arranged around the hollow functional area;

a second ground wire is arranged in the second transition area;

the second ground is arranged around the display area;

the first ground line is grounded through the second ground line.

10. The liquid crystal display panel according to claim 1,

the liquid crystal display panel also comprises a color film substrate and an array substrate;

the color film substrate comprises a first substrate, and the array substrate comprises a second substrate;

the first substrate base plate is at least positioned in the display area, the first transition area and the hollow functional area;

the second substrate base plate is at least positioned in the display area, the first transition area and the hollow functional area.

11. The liquid crystal display panel according to claim 1,

the hollow functional area penetrates through the liquid crystal display panel along the direction perpendicular to the first plane.

12. The liquid crystal display panel according to any one of claims 1 to 11,

the function module includes image acquisition module, and sound collection module, infrared detection module, fingerprint identification module, one or more in the earphone module.

13. A display device comprising the liquid crystal display panel according to any one of claims 1 to 12.