CN106200158A - Display floater and preparation method thereof, display device - Google Patents

Abstract

The invention provides a display panel, a manufacturing method thereof, and a display device, belonging to the technical field of display. Wherein, the display panel includes a first substrate and a second substrate oppositely arranged, the first substrate is provided with a common electrode, and the second substrate is provided with a conductive pattern, and the conductive pattern is connected to the common electrode. At least two connection points are electrically connected. Through the technical solution of the present invention, the uniformity and stability of the common electrode voltage of the display panel can be ensured without increasing the load of the display panel, and the display effect of the display panel can be improved.

Description

Display panel, manufacturing method thereof, and display device

technical field

The present invention relates to the field of display technology, in particular to a display panel, a manufacturing method thereof, and a display device.

Background technique

Currently, in the field of TFT-LCD (Thin Film Transistor-Liquid Crystal Display, Thin Film Transistor-Liquid Crystal Display), with the continuous updating of technology, the liquid crystal display panel is rapidly developing toward larger size.

Advanced Super Dimension Switch technology (ADvanced Super Dimension Switch, AD-SDS, referred to as ADS), through the electric field generated by the edge of the slit pixel electrode in the same plane and the electric field generated between the slit pixel electrode layer and the plate-shaped common electrode layer. The multi-dimensional electric field makes all the aligned liquid crystal molecules between the slit pixel electrodes in the liquid crystal cell and directly above the common electrode rotate, thereby improving the working efficiency of the liquid crystal and increasing the light transmission efficiency. Advanced ultra-dimensional field conversion technology can improve the picture quality of TFT-LCD products, with high resolution, high transmittance, low power consumption, wide viewing angle, high aperture ratio, low color difference, no push Mura, etc. advantage.

With the continuous increase of the size of the liquid crystal display panel, the poor uniformity of the common electrode voltage in the liquid crystal display panel has become an important factor affecting the picture quality of the large-size liquid crystal display panel. In order to solve this problem, the existing array substrate is designed with A plurality of common electrode lines parallel to the grid lines are connected to the common electrodes through via holes, thereby reducing the resistance of the common electrodes and improving the uniformity of the voltage of the common electrodes. However, on the one hand, the setting of via holes reduces the aperture ratio of the display panel; on the other hand, since the common electrode lines are parallel to the gate lines, the common electrode lines will cross the data lines, so that the overlap between the common electrode lines and the data lines The capacitance is large, one is to increase the load of the display panel, and the data signal will also cause crosstalk to the voltage of the common electrode, affecting the uniformity and stability of the common electrode voltage, and then affecting the actual voltage difference on the liquid crystal, affecting the display screen .

Contents of the invention

The technical problem to be solved by the present invention is to provide a display panel, its manufacturing method, and a display device, which can ensure the uniformity and stability of the common electrode voltage of the display panel and improve the display of the display panel without increasing the load on the display panel. Effect.

In order to solve the above technical problems, embodiments of the present invention provide technical solutions as follows:

In one aspect, a display panel is provided, including a first substrate and a second substrate oppositely arranged, the first substrate is provided with a common electrode, the second substrate is provided with a conductive pattern, and the conductive pattern and the At least two connection points on the common electrode are electrically connected.

Further, the conductive pattern is made of transparent conductive material; or

Conductive black matrix patterns are disposed on the second substrate, and the conductive black matrix patterns are multiplexed into the conductive patterns.

Further, the second substrate is provided with a black matrix pattern, the conductive pattern is made of opaque conductive material, and the projection of the conductive pattern on the second substrate falls into the black matrix pattern on the within the projection on the second substrate.

Further, a spacer for supporting the thickness of the display panel box is provided between the first substrate and the second substrate, the spacer is a conductive spacer, and the conductive pattern and the common electrode pass through the The conductive spacer is electrically connected.

Further, a flat layer is separated between the conductive pattern and the conductive spacer, and the conductive spacer is connected to the conductive pattern through a via hole penetrating through the flat layer.

Further, the display panel includes a display area and a non-display area located around the display area, the first substrate is provided with a common electrode voltage input line surrounding the display area, and the common electrode voltage input line is connected to the common electrode connected, the conductive pattern is electrically connected to the common electrode voltage input line, and is electrically connected to the common electrode through the common electrode voltage input line.

Further, the non-display area is provided with a conductive spacer wall, and the conductive pattern is electrically connected to the common electrode voltage input line through the conductive spacer wall.

Further, the non-display area is provided with a conductive sealant surrounding the display area, and the conductive pattern is electrically connected to the common electrode voltage input line through the conductive sealant.

An embodiment of the present invention also provides a display device, including the above-mentioned display panel.

An embodiment of the present invention also provides a method for manufacturing a display panel, which is used to manufacture the above-mentioned display panel, and the method includes:

forming a common electrode on the first substrate;

A conductive pattern is formed on the second substrate, and the conductive pattern is electrically connected to at least two connection points on the common electrode.

Embodiments of the present invention have the following beneficial effects:

In the above scheme, a conductive pattern is provided on the second substrate opposite to the first substrate, the conductive pattern is electrically connected to at least two connection points on the common electrode, and the conductive pattern is connected in parallel with the common electrode, which can reduce the resistance of the common electrode, Further improve the uniformity of the common electrode voltage; and since the conductive pattern is arranged on the second substrate, the distance from the common electrode on the first substrate is not less than the box thickness of the display panel, therefore, the overlapping of the conductive pattern and the metal pattern on the array substrate The capacitance is almost negligible, so that the load on the display panel will not be increased. In addition, the signal transmitted on the metal pattern of the array substrate will not cause crosstalk to the voltage of the common electrode, so that the display effect of the display panel can be guaranteed.

Description of drawings

FIG. 1 is a schematic plan view of an existing array substrate;

2 is a schematic plan view of a display panel according to an embodiment of the present invention;

3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention;

FIG. 4 is another schematic plan view of a display panel according to an embodiment of the present invention.

reference sign

1 Gate line 2 Data line 3 Common electrode line 4 Common electrode 5 Via hole

6 Common electrode voltage input line 11 Substrate substrate 12 Gate insulating layer 13 Active layer

14 source electrode 15 drain electrode 16 first insulating layer 17 pixel electrode

18 Second insulating layer 19 Gate electrode 21 Planarization layer 22 Black matrix 23 Spacers

25 The setting position of the spacer

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in FIG. 1, a plurality of common electrode lines 3 parallel to the gate lines 1 are designed on the existing array substrate, and the common electrode lines 3 are connected to the common electrodes 4 through via holes 5, thereby reducing the resistance of the common electrodes 4. , to improve the uniformity of the common electrode voltage. However, on the one hand, the setting of the via hole 5 reduces the aperture ratio of the display panel; The overlapping capacitance between lines 2 is relatively large. First, it increases the load of the display panel, and the data signal will also cause crosstalk to the voltage of the common electrode 4, which will affect the uniformity and stability of the voltage of the common electrode, and further affect the display on the liquid crystal. The actual voltage difference will affect the display screen.

In order to solve the above problems, embodiments of the present invention provide a display panel and its manufacturing method, and a display device, which can ensure the uniformity and stability of the common electrode voltage of the display panel without increasing the load of the display panel, and improve the display panel. display effect.

Embodiment one

This embodiment provides a display panel, including a first substrate and a second substrate oppositely arranged, a common electrode is arranged on the first substrate, a conductive pattern is arranged on the second substrate, and the conductive pattern and the At least two connection points on the common electrode are electrically connected.

In this embodiment, a conductive pattern is arranged on the second substrate opposite to the first substrate, the conductive pattern is electrically connected to at least two connection points on the common electrode, and the conductive pattern is connected in parallel with the common electrode, which can reduce the resistance of the common electrode , thereby improving the uniformity of the common electrode voltage; and since the conductive pattern is arranged on the second substrate, the distance from the common electrode on the first substrate is not less than the box thickness of the display panel, therefore, the intersection of the conductive pattern and the metal pattern on the array substrate The stack capacitance is almost negligible, thereby not increasing the load of the display panel. In addition, the signal transmitted on the metal pattern of the array substrate will not cause crosstalk to the voltage of the common electrode, which can ensure the display effect of the display panel.

In a preferred embodiment, the conductive pattern is made of transparent conductive material, which can reduce the influence of the conductive pattern on the aperture ratio of the display panel.

In another preferred embodiment, the black matrix pattern provided on the second substrate is conductive, and the black matrix pattern is multiplexed into a conductive pattern, so that it is not necessary to make a special conductive pattern, and the aperture ratio of the display panel will not be affected.

In another preferred embodiment, the second substrate is provided with a black matrix pattern, the conductive pattern is made of opaque conductive material, and the projection of the conductive pattern on the second substrate falls into the black matrix The graphics are projected on the second substrate, so that the arrangement of the conductive graphics will not affect the aperture ratio of the display panel.

Specifically, a spacer for supporting the thickness of the display panel box is provided between the first substrate and the second substrate, the spacer is a conductive spacer, and the conductive pattern and the common electrode pass through the The conductive spacer is electrically connected.

Further, a flat layer is separated between the conductive pattern and the conductive spacer, and the conductive spacer is connected to the conductive pattern through a via hole penetrating through the flat layer.

Further, the display panel includes a display area and a non-display area located around the display area, the first substrate is provided with a common electrode voltage input line surrounding the display area, and the common electrode voltage input line is connected to the common electrode connected, the conductive pattern is electrically connected to the common electrode voltage input line, and is electrically connected to the common electrode through the common electrode voltage input line.

In a specific embodiment, the non-display area is provided with a conductive spacer wall, and the conductive pattern can be electrically connected to the common electrode voltage input line through the conductive spacer wall, and the spacer The retaining wall can also prevent the liquid crystal in the display area from entering the non-display area, prevent liquid crystal pollution, reduce related defects, and achieve the effect of improving picture quality.

In another specific embodiment, the non-display area is provided with a conductive sealant surrounding the display area, and the conductive pattern is electrically connected to the common electrode voltage input line through the conductive sealant.

Embodiment two

This embodiment also provides a display device, including the above-mentioned display panel. The display device can be any product or component with display function such as LCD TV, liquid crystal display, digital photo frame, mobile phone, tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane.

Embodiment Three

This embodiment also provides a method for manufacturing a display panel, which is used to manufacture the above-mentioned display panel, and the method includes:

forming a common electrode on the first substrate;

A conductive pattern is formed on the second substrate, and the conductive pattern is electrically connected to at least two connection points on the common electrode.

In this embodiment, a conductive pattern is arranged on the second substrate opposite to the first substrate, the conductive pattern is electrically connected to at least two connection points on the common electrode, and the conductive pattern is connected in parallel with the common electrode, which can reduce the resistance of the common electrode , thereby improving the uniformity of the common electrode voltage; and since the conductive pattern is arranged on the second substrate, the distance from the common electrode on the first substrate is not less than the box thickness of the display panel, therefore, the intersection of the conductive pattern and the metal pattern on the array substrate The stack capacitance is almost negligible, thereby not increasing the load of the display panel. In addition, the signal transmitted on the metal pattern of the array substrate will not cause crosstalk to the voltage of the common electrode, which can ensure the display effect of the display panel.

Of course, this embodiment also includes other steps for forming other parts of the display panel, and since the other steps are the same as the existing steps for forming a display panel, they will not be repeated here.

Embodiment Four

As shown in FIG. 2, the array substrate of this embodiment is provided with gate lines 1, data lines 2 and common electrodes 4, and no common electrode lines 3 are provided. The display panel includes a display area and a non-display area surrounding the display area. The display area is provided with a common electrode voltage input line 6 surrounding the display area. As shown in FIG. 3 , the common electrode voltage input line 6 is connected to the common electrode 4 for inputting the common electrode voltage into the common electrode 4 .

As shown in FIG. 3 , the display panel includes a color filter substrate and an array substrate arranged opposite to each other. The array substrate includes a base substrate 11, a gate electrode 19 formed on the base substrate 11, a gate insulating layer 12, an active layer 13, Source electrode 14, drain electrode 15, first insulating layer 16, pixel electrode 17, second insulating layer 18 and common electrode 4, wherein, gate electrode 19, gate insulating layer 12, active layer 13, source electrode 14, drain electrode 15 constitutes a switching thin film transistor, the drain electrode 15 is connected to the pixel electrode 17 through the via hole penetrating the first insulating layer 16 , and the common electrode voltage input line 6 is connected to the common electrode 4 through the via hole 5 . The color filter substrate includes a black matrix 22 and a color filter unit formed on the base substrate. The black matrix 22 is formed of an opaque conductive material. The color filter unit and the black matrix 22 are covered with a flat layer 21. The display panel also includes There are a plurality of spacers 23 used to support the thickness of the display panel box. The spacers 23 are formed of conductive materials. One end of the spacers 23 is connected to the black matrix 22 through a via hole penetrating the flat layer. The other end of the spacers 23 One end is connected to the common electrode 4 , so that the electrical connection between the black matrix 22 and the common electrode 4 is realized through the spacer 23 .

In this embodiment, a conductive black matrix is arranged on the color filter substrate opposite to the array substrate, and the black matrix is electrically connected to at least two connection points on the common electrode through a conductive spacer, so as to realize the connection between the black matrix and the common electrode. The electrodes are connected in parallel, which can reduce the resistance of the common electrode, thereby improving the uniformity of the voltage of the common electrode; and since the black matrix is arranged on the color filter substrate, the distance from the common electrode on the array substrate is not less than the box thickness of the display panel. Therefore, the black matrix The overlap capacitance with the data lines on the array substrate is almost negligible, so that the load on the display panel will not be increased. In addition, the signals transmitted on the data lines of the array substrate will not cause crosstalk to the voltage of the common electrode, which can ensure that the display panel display effect.

In the prior art, the manufacturing process of the color filter substrate is to make a black matrix -> make a color filter unit -> make a flat layer -> make a spacer. The technical solution of this embodiment only needs to pattern the flat layer to make a It only needs to correspond to the via holes of the spacers so that the spacers can be connected to the black matrix through the via holes.

Furthermore, if the black matrix is made of non-conductive materials, a conductive layer can also be deposited on the color filter substrate, and the conductive layer can be patterned to make a conductive pattern by using the mask for making the black matrix, and then the conductive layer can be formed through the conductive spacer. The conductive pattern is connected to the common electrode, and the projection of the conductive pattern on the color filter substrate falls into the projection of the black matrix pattern on the color filter substrate, so that the conductive pattern will not affect the aperture ratio of the display panel.

Further, as shown in FIG. 4 , the array substrate is provided with a common electrode voltage input line 6 surrounding the display area, and the common electrode voltage input line 6 inputs a common voltage to the common electrode 4, and the common electrode voltage can be designed on the color filter substrate. The conductive spacers contacted by the input lines 6 further realize the electrical connection between the conductive patterns on the color filter substrate and the common electrodes on the array substrate. For the locations of these conductive spacers, refer to position 25 in FIG. 4 .

Furthermore, a conductive spacer barrier can also be provided in the non-display area of the display panel, and the conductive pattern on the color filter substrate and the common electrode voltage input line are electrically connected through the conductive spacer barrier, thereby realizing the color filter substrate. The electrical connection between the upper conductive pattern and the common electrode.

Furthermore, the frame sealant in the non-display area can also be designed to be conductive. Specifically, the frame sealant can be doped with gold balls to improve the conductivity of the frame sealant, and the color film can be electrically connected through the conductive frame sealant. The conductive pattern on the substrate and the voltage input line of the common electrode realize the electrical connection between the conductive pattern on the color filter substrate and the common electrode.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A display panel, comprising a first substrate and a second substrate oppositely arranged, wherein a common electrode is arranged on the first substrate, a conductive pattern is arranged on the second substrate, and the conductive pattern is connected to the second substrate. At least two connection points on the common electrode are electrically connected. 2. The display panel according to claim 1, wherein the conductive pattern is made of a transparent conductive material; or Conductive black matrix patterns are disposed on the second substrate, and the conductive black matrix patterns are multiplexed into the conductive patterns. 3. The display panel according to claim 1, wherein a black matrix pattern is arranged on the second substrate, the conductive pattern is made of an opaque conductive material, and the conductive pattern is formed on the second substrate The projection on falls into the projection of the black matrix pattern on the second substrate. 4. The display panel according to any one of claims 1-3, wherein a spacer for supporting the thickness of the display panel box is arranged between the first substrate and the second substrate, and the spacer The object is a conductive spacer, and the conductive pattern is electrically connected to the common electrode through the conductive spacer. 5. The display panel according to claim 4, wherein a flat layer is separated between the conductive pattern and the conductive spacer, and the conductive spacer passes through the via hole penetrating the flat layer and The conductive patterns are connected. 6. The display panel according to any one of claims 1-3, wherein the display panel comprises a display area and a non-display area located around the display area, and the first substrate is provided with The common electrode voltage input line, the common electrode voltage input line is connected to the common electrode, the conductive pattern is electrically connected to the common electrode voltage input line, and is connected to the common electrode through the common electrode voltage input line electrical connection. 7. The display panel according to claim 6, wherein the non-display area is provided with a conductive spacer wall, and the conductive pattern passes through the conductive spacer wall and the common electrode The voltage input line is electrically connected. 8. The display panel according to claim 6, wherein the non-display area is provided with a conductive sealant surrounding the display area, and the conductive pattern passes through the conductive sealant and the common electrode voltage input line electrical connection. 9. A display device, comprising the display panel according to any one of claims 1-8. 10. A manufacturing method of a display panel, characterized in that it is used to manufacture the display panel according to any one of claims 1-8, the manufacturing method comprising: forming a common electrode on the first substrate; A conductive pattern is formed on the second substrate, and the conductive pattern is electrically connected to at least two connection points on the common electrode.