CN112835231B - Display panel and display device - Google Patents

Abstract

The present invention provides a display panel and a display device using the display panel. By patterning the ITO electrodes on the first substrate side, an electric field in the horizontal direction can also be generated on the first substrate side, which can better overcome The elastic force and viscous force of the liquid crystal make the liquid crystal molecules fall according to the preset angle, avoiding abnormal alignment, and at the same time realize that the liquid crystal molecules on the first substrate side and the second substrate side fall first, and the liquid crystal molecules on both sides are simultaneously and gradually The layer drives the liquid crystal in the middle to dump, which shortens the alignment time and improves the response speed of the display panel; the pattern of the ITO electrode on the first substrate side is consistent with the pattern of the ITO electrode on the second substrate side, that is, the same mask can be used for the first The ITO electrodes on the substrate side and the ITO electrodes on the second substrate side are patterned, which reduces the number of mask plates and reduces the manufacturing cost of the display panel.

Description

Display panel and display device

technical field

The present application relates to the field of display technology, in particular to a display panel and a display device using the display panel.

Background technique

In order to achieve a wider viewing angle, patterned vertical alignment technology (PVA, patterned vertical alignment) has been more and more widely used in liquid crystal display devices in recent years. This technology uses transparent indium tin oxide (Indium tin oxide, ITO) electrode, and apply a voltage on the ITO electrode, so that the liquid crystal molecules in the display panel are divided into multiple domains, and then the liquid crystal orientation is cured by irradiating ultraviolet light, resulting in a pre-tilt angle; the brightness of different domains is due to the different orientation angles of liquid crystals. There are differences, and the brightness of different domains compensates each other to achieve the purpose of increasing the viewing angle.

In the existing display panel, there is the problem of abnormal alignment caused by liquid crystal molecules not tilting according to the preset angle; in addition, there is also the problem of slow response speed caused by the slow falling speed of liquid crystal molecules, abnormal alignment and A slow response speed will affect the display effect of the liquid crystal display device.

Contents of the invention

The present invention provides a display panel and a display device using the display panel to overcome the problems of abnormal alignment and slow response speed existing in the existing display panel.

In order to solve the problems of the technologies described above, the technical solution provided by the present invention is:

In a first aspect, this embodiment provides a display panel, and the display panel includes:

a first substrate and a second substrate arranged in parallel;

a liquid crystal layer disposed between the first substrate and the second substrate;

a first electrode disposed on the first substrate, the first electrode comprising a plurality of first electrode portions arranged at intervals;

a second electrode disposed on the second substrate, the second electrode comprising a plurality of second electrode portions arranged at intervals;

an alignment circuit electrically connected to the first electrode and the second electrode, the alignment circuit is used to apply a voltage to the first electrode and the second electrode to generate a voltage capable of making the liquid crystal in the liquid crystal layer Alignment electric field for molecular dumping.

In some embodiments, the number of the plurality of first electrode portions is the same as the number of the plurality of second electrode portions.

In some embodiments, the distance between the plurality of first electrode portions is the same; and/or

The distances between the plurality of second electrode parts are the same.

In some embodiments, the distance between the plurality of first electrode portions is the same as the distance between the plurality of second electrode portions.

In some embodiments, the first electrode and the second electrode are transparent ITO electrodes.

In some embodiments, the distance between the plurality of first electrode portions and the distance between the plurality of second electrode portions is between 1 micron and 50 microns.

In some implementations, the direction parallel to the first substrate and the second substrate is the first direction, and the projections of the plurality of first electrode parts on the second direction are the same as those of the plurality of second electrode parts. The projections in the second direction coincide one by one, and the second direction is perpendicular to the first direction.

In some embodiments, among the plurality of first electrode portions, the voltage on each first electrode portion is the same; and/or,

Among the plurality of second electrode parts, the voltage on each second electrode part is the same.

In some embodiments, the magnitude of the voltage on the plurality of first electrode portions is the same as the magnitude of the voltage on the plurality of second electrode portions.

In some embodiments, the plurality of first electrode portions are connected in parallel with each other.

On the other hand, the embodiment of the present application provides a display device, and the display device includes the display panel in the embodiment of the present application.

Embodiments of the present application provide a display panel and a display device using the display panel. First electrodes and second electrodes are provided on both side substrates (first substrate and second substrate) of the display panel, and the alignment circuit is connected to The first electrode and the second electrode are used to apply a voltage to the first electrode and the second electrode, and generate an alignment electric field between the substrates on both sides to make the liquid crystal molecules in the liquid crystal layer fall; through the first electrode and the second electrode The two electrodes are processed to form a plurality of spaced electrode parts, so that the alignment electric field has a component along the horizontal direction at the first electrode and the second electrode, and the generated electric field force can better overcome the elastic force and viscosity of the liquid crystal molecules. The hysteresis force enables the liquid crystal molecules to fall to the preset angle, avoiding abnormal alignment. At the same time, the liquid crystal molecules near the substrates on both sides can fall under the action of the electric field force first, and then drive the liquid crystal molecules in the middle to fall layer by layer, shortening the length of time. The alignment time and response time are improved, and the corresponding speed is improved.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through the detailed description of the specific embodiments of the present application below in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a display panel in the prior art;

FIG. 2 is a schematic structural diagram of a display panel according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

The present application provides a display panel and a display device using the display panel, which will be described in detail below.

In the prior art, as shown in FIG. 1 , a display panel includes a first substrate 10 and a second substrate 20 arranged parallel to each other, the first substrate 10 includes a first substrate 100 and a first electrode 11, and the first electrode 11 Set on the first substrate 100, the second substrate 20 includes a second substrate 200 and a second electrode 21, the second electrode 21 is arranged on the second substrate 200, the first substrate 10 and the second substrate 20 are parallel to each other Set, a liquid crystal layer 30 is provided between the first substrate 10 and the second substrate 20, the liquid crystal layer 30 includes a plurality of liquid crystal molecules 31, the first electrode 11 is arranged on the inner surface of the first substrate 10, and the second substrate 10 is provided on the inner surface of the first substrate 10. An electrode 11 provides support, and the second electrode 21 is arranged on the inner surface of the second substrate 20, and the second substrate 20 provides support for the second electrode 21; the display panel also includes an alignment circuit (not shown), and the alignment circuit and The first electrode 11 and the second electrode 21 are electrically connected, and when the alignment circuit supplies voltage to the first electrode 11 and the second electrode 21 , a vertical electric field is generated between the first electrode 11 and the second electrode 21 .

Existing display panels usually adopt patterned vertical alignment technology, that is, on the side of the second substrate 20, the second electrode 21 is patterned, and the second electrode 21 is a transparent ITO electrode. The ITO conductive substrate is patterned by etching and other processes, and then the ITO thin film is formed on the patterned ITO conductive substrate by vacuum evaporation, screen printing or electrodeposition; as shown in Figure 1, the second patterned ITO film The electrode 21 includes a plurality of second electrode parts 22, there are intervals between the plurality of second electrode parts 22, and a transverse electric field is generated between the plurality of second electrode parts 22, and the transverse electric field is connected to the first electrode 11 and the second electrode 21. The vertical electric fields generated between them are superimposed to form an alignment electric field between the first substrate 10 and the second substrate 20 , and the schematic electric field line is 40 .

The alignment electric field has components along the horizontal direction and the vertical direction. On the side close to the second electrode 21, the alignment electric field has a component along the horizontal direction. As shown in FIG. 1, the liquid crystal molecules 31 on the side close to the second substrate 20 are aligned Under the action of the electric field, the liquid crystal molecules 31 in the upper layer are gradually dumped from the vertical state to the horizontal state. However, when only a transverse electric field is generated between the plurality of second electrode portions 22 on one side of the second substrate 20, the electric force of the alignment electric field in the horizontal direction is relatively weak, and it is difficult to overcome the elastic force and viscous force between liquid crystal molecules. The liquid crystal molecules 31 cannot fall according to the preset angle, resulting in abnormal alignment; in addition, because the liquid crystal molecules 31 on the side close to the second substrate 20 can only fall first, and then drive the liquid crystal molecules on the upper layer to gradually fall, resulting in a longer alignment time , which increases the response time of the display panel and affects the display effect.

An embodiment of the present application provides a display panel. As shown in FIG. 2 , the display panel includes a first substrate 101 and a second substrate 201 arranged parallel to each other. In the embodiment of the present application, the first substrate 101 is a color filter substrate. The second substrate 201 is an array substrate; the first substrate 101 includes a first substrate 110 and a first electrode 102, the second substrate 201 includes a second substrate 210 and a second electrode 202, and the first substrate 101 and the second substrate 201 are mutually Arranged in parallel, a liquid crystal layer 301 is provided between the first substrate 101 and the second substrate 201, the liquid crystal layer 301 includes a plurality of liquid crystal molecules 302, the first electrode 102 is arranged on the inner surface of the first substrate 110, the first substrate The bottom 110 provides support for the first electrode 102, the second electrode 202 is arranged on the inner surface of the second substrate 210, the second substrate 210 provides support for the second electrode 202, the first substrate 110 and the second substrate 210 The material can be glass, quartz or resin.

In the embodiment of the present application, the display panel further includes an alignment circuit (not shown in the figure), and the alignment circuit is electrically connected to the first electrode 102 and the second electrode 202. When the alignment circuit provides the first electrode 102 and the second electrode 202 When a voltage is supplied, a vertical electric field is generated between the first electrode 102 and the second electrode 202 .

The second electrode 202 is a transparent ITO electrode. As shown in FIG. 2 , after the second electrode 202 is patterned, a plurality of second electrode portions 203 are formed, and a layer having a component along the horizontal direction is formed between the plurality of second electrode portions 203 . Electric field, the first electrode 102 includes a plurality of first electrode portions 103, therefore, on the side close to the first substrate 101, an electric field with a component along the horizontal direction can also be formed between the plurality of first electrode portions 103, the first electrode 102 and the second electrode 202 are set opposite to each other, and a vertical electric field is formed between them. Between the first substrate 101 and the second substrate 201, multiple electric fields are superimposed to form an alignment electric field, which shows that the electric field line is 41, and the alignment electric field is Both at the first electrode and at the second electrode have components along the horizontal direction.

In the area between the first substrate 101 and the second substrate 201, from the middle of the first substrate 101 and the second substrate 201 to the first substrate 101 side in the vertical direction, and from the first substrate 101 and the second substrate 201 From the middle of the alignment field along the vertical direction to the side of the second substrate 201, the component of the alignment electric field in the horizontal direction gradually increases. Since there is an electric field force in the horizontal direction on the first substrate 101 side and the second substrate 201 side, the electric field force of the alignment electric field can overcome the elastic force and viscous force between the liquid crystal molecules 302, avoiding that the liquid crystal molecules 302 cannot Alignment abnormal problem caused by dumping. At the same time, the liquid crystal molecules 302 on the side close to the first substrate 101 and the liquid crystal molecules 302 on the side close to the second substrate 201 can play a leading role, and the liquid crystal molecules 302 at the two places drive the liquid crystal molecules 302 in the middle layer by layer according to the preset Angled dump for improved responsiveness, shortened alignment time and response time.

The first electrode 102 may be a metal electrode, but to form a plurality of first electrode parts 103 on the metal electrode layer, the process is difficult and the cost is high. In some embodiments of the present application, the first electrode 102 is a transparent ITO electrode, and a plurality of first electrode parts 103 are formed on the first electrode 102 by using a patterning method, which is easy to implement in technology and reduces the manufacturing cost of the display panel .

In some embodiments of the present application, the number of the plurality of first electrode parts 103 and the number of the plurality of second electrode parts 203 are the same, so that the connection between the plurality of first electrode parts 103 and the plurality of second electrode parts 203 is easier. One-to-one correspondence is realized to enhance the electric field force of the electric field formed between the first electrode 102 and the second electrode 202 in the vertical direction, so as to make the liquid crystal molecules 302 in the liquid crystal layer 301 fall more easily.

In some embodiments of the present application, the distances between the plurality of first electrode portions 103 are equal, so it is easy to realize the uniform distribution of the electric field between the plurality of first electrode portions 103, so that the liquid crystal on the side close to the first substrate 101 The molecules 103 can keep pouring down uniformly, which shortens the response time of the display panel. In addition, the plurality of first electrode parts 103 are evenly distributed, which simplifies the patterning process of the first electrodes 102 and is easier to implement in terms of technology.

Optionally, in some implementations of the present application, on the side of the second substrate 201, the distances between the plurality of second electrode parts 203 are also equal, so as to easily realize the uniform distribution of the electric field between the first electrode parts 103 , so that the liquid crystal molecules 103 on the side close to the first substrate 101 can keep falling uniformly.

In the patterning process of the ITO electrode, it is necessary to use a mask to form a circuit device pattern, and at the same time, the first electrode 102 on the side of the first substrate 101 and the second electrode 202 on the side of the second substrate 201 are patterned. When , two mask plates are required, thereby increasing the manufacturing time and cost of the display panel. In some embodiments of the present application, as shown in FIG. 2, the number of the plurality of first electrode parts 103 is equal to the number of the plurality of second electrode parts 203, while the number of the plurality of first electrode parts 103 and the plurality of second electrodes The parts 203 are evenly distributed, and the distance d1 between the plurality of first electrode parts 103 and the distance d2 between the plurality of second electrode parts 203 are equal, that is, the pattern on the first electrode 102 is consistent with the pattern on the second electrode 202; Therefore, when the first electrode 102 on the first substrate 101 side and the second electrode 202 on the second substrate 201 side are patterned, only one mask is needed, which shortens the production cycle of the display panel and reduces the manufacturing cost.

It can be understood that after the first electrode 102 and the second electrode 202 are patterned using the same mask, the multiple first electrode parts 103 and the multiple second electrode parts 203 may not be evenly distributed, That is, the distance d1 between the plurality of first electrode portions 103 may be different, and the distance d2 between the plurality of second electrode portions 203 may be different.

The distances d1 and d2 between a plurality of first electrode parts are related to the precision of the mask plate. The higher the precision of the mask plate, the smaller the distance between the multiple electrode parts, and the electrodes that can be formed on the ITO electrodes of the same area The greater the number of portions, the more uniform the distribution of the lateral electric field between the first substrate 101 and the second substrate 201 can be made. In the embodiment of the present application, the distance d1 between the plurality of first electrode parts and the distance d2 between the plurality of second electrode parts are between 1 micron and 50 microns. In the case of controllable implementation and cost, the distance d1 between the plurality of first electrode parts and the distance d2 between the plurality of second electrode parts may also be less than 1 micron, which is not limited here.

In some embodiments of the present application, as shown in FIG. 2 , the projections of the plurality of first electrode portions 103 in the second direction are the same as the projections of the plurality of second electrode portions 203 in the second direction. One-to-one correspondence coincides, that is, a plurality of first electrode parts 103 and a plurality of second electrode parts 203 are aligned one by one, and the first electrode parts 103 and the second electrode parts 203 are in direct correspondence so that the first substrate 101 and the second substrate 201 The arrangement of the alignment electric field between them is more uniform in the vertical direction, and the component of the alignment electric field in the vertical direction is maximized, which is beneficial to the tilting and alignment of the liquid crystal molecules 302 .

In some embodiments of the present application, among the plurality of first electrode portions 103, the voltage on each first electrode portion 103 is the same, so that the electric fields generated between the plurality of first electrode portions 103 are the same, The alignment electric field can be uniformly distributed on the side close to the first substrate 101 , so that the tilting angles of the liquid crystal molecules 302 on the side close to the first substrate 101 are consistent, and the alignment speed is improved.

Optionally, in some implementations of the present application, on the side of the second substrate 201, the voltages on the plurality of second electrode parts 203 are also the same, so that the liquid crystal molecules 302 on the side close to the first substrate 101 fall at the same angle , to increase the alignment speed.

In some embodiments of the present application, the magnitude of the voltage on the plurality of first electrode parts 103 is the same as the magnitude of the voltage on the plurality of second electrode parts 203, so that the alignment electric field between the first substrate 101 and the second substrate 201 can be The distribution in the vertical direction is uniform, so that the tilting angles of the liquid crystal molecules 302 in the liquid crystal layer 301 are the same, and the alignment speed and response speed are improved.

In some embodiments of the present application, on the side of the first substrate 101, there is no insulating layer between the first electrode 102 and the M1 film layer on the first substrate 101, and the first electrode 102 is electrically connected to the M1 film layer. The parallel connection between the two first electrode parts 103 is realized, the power supply on the first electrode 102 becomes easy, and the alignment circuit is simplified. It should be noted that the pattern of the M1 film layer on the first substrate 101 side can be the same as the pattern of the M1 film layer on the second substrate 201 side, that is, when the M1 film layer is patterned, only one mask is required. The production cycle of the display panel can be shortened, and the production cost can be reduced.

The embodiment of the present application further provides a display device, including the display panel provided in the embodiment, and the display device may be a display screen of a computer or a television, etc., which is not limited here.

Embodiments of the present application provide a display panel and a display device using the display panel. By patterning the ITO electrodes on the first substrate side, an electric field in the horizontal direction can also be generated on the first substrate side, which can better Overcoming the elastic force and viscous force of the liquid crystal, the liquid crystal molecules fall according to the preset angle, avoiding abnormal alignment, and at the same time realize that the liquid crystal molecules on the first substrate side and the second substrate side fall first, and the liquid crystal molecules on both sides At the same time, the liquid crystal in the middle is driven down layer by layer, which shortens the alignment time and improves the response speed of the display panel; the pattern of the ITO electrode on the first substrate side is consistent with the pattern of the ITO electrode on the second substrate side, that is, the same mask can be used to pair The ITO electrodes on the first substrate side and the ITO electrodes on the second substrate side are patterned, which reduces the number of mask plates and reduces the manufacturing cost of the display panel.

A display panel and a display device provided by the present application have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present application. The description of the above embodiments is only used to help understand the technical solution of the present application. and its core idea; those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the corresponding The essence of the technical solutions deviates from the scope of the technical solutions of the embodiments of the present application.

Claims (4)

1. A display panel, characterized in that the display panel comprises: a first substrate and a second substrate arranged in parallel; a liquid crystal layer disposed between the first substrate and the second substrate; A first electrode disposed on the first substrate, the first electrode includes a plurality of first electrode parts arranged at intervals, and the plurality of first electrode parts are arranged in the same layer; a second electrode disposed on the second substrate, the second electrode includes a plurality of second electrode parts arranged at intervals, and the plurality of second electrode parts are arranged in the same layer; an alignment circuit electrically connected to the first electrode and the second electrode, the alignment circuit is used to apply a voltage to the first electrode and the second electrode to generate a voltage capable of making the liquid crystal in the liquid crystal layer an alignment electric field for molecular dumping; in the region between the first substrate and the second substrate, from the middle of the first substrate and the second substrate to the side of the first substrate in a vertical direction, And from the middle of the first substrate and the second substrate along the vertical direction to the side of the second substrate, the component of the alignment electric field in the horizontal direction gradually increases; The number of the plurality of first electrode parts is the same as the number of the plurality of second electrode parts; The distance between the plurality of first electrode parts is the same, the distance between the plurality of second electrode parts is the same, the distance between the plurality of first electrode parts and the distance between the plurality of second electrode parts the same distance between The first electrode and the second electrode are transparent ITO electrodes; The plurality of first electrode parts are connected in parallel, and among the plurality of first electrode parts, the voltage on each first electrode part is the same; among the plurality of second electrode parts, each second electrode part The voltages on are the same. 2 . The display panel according to claim 1 , wherein the distance between the plurality of first electrode portions and the distance between the plurality of second electrode portions is between 1 μm and 50 μm. 3. The display panel according to claim 1, wherein the direction parallel to the first substrate and the second substrate is a first direction, and projections of the plurality of first electrode portions on the second direction , coincide with one-to-one correspondence of projections of the plurality of second electrode portions in a second direction, the second direction being perpendicular to the first direction. 4. A display device, comprising the display panel according to any one of claims 1 to 3.

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