CN103645586A - Liquid crystal display panel, manufacturing method of liquid crystal display panel and display device - Google Patents

Abstract

Embodiments of the present invention provide a liquid crystal display panel, a manufacturing method thereof, and a display device, and relate to the field of display technologies. Comprising a first substrate, a second substrate and a layer of liquid crystal molecules located between the first substrate and the second substrate, the first substrate and/or the second substrate are close to the liquid crystal molecules An alignment layer is formed on the surface of one side of the layer; conductive particles are doped in the alignment layer. Such a liquid crystal display panel can reduce the driving voltage of the liquid crystal display device and improve product quality.

Description

A liquid crystal display panel, its manufacturing method, and display device

technical field

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

Background technique

TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display) display technology has been widely used in various display fields because of its low energy consumption and low cost. With the continuous development of TFT-LCD display technology, how to further reduce the energy consumption of LCD display products and improve the quality of LCD display products has become an urgent problem to be solved.

For LCD display products, an important aspect of reducing energy consumption is how to reduce the driving voltage of liquid crystal molecules in the liquid crystal display device. In the prior art, a research method that can reduce the driving voltage of liquid crystal is proposed. This method adopts the display panel structure as shown in Fig. 13 is filled between the color filter substrate 11 and the array substrate 12. In the traditional liquid crystal molecular layer, a relatively high VOP (driving voltage) is required to drive the liquid crystal 131 molecules to deflect, which will generate large energy consumption. In order to reduce the liquid crystal Molecular VOP is also doped with a certain amount of ferroelectric nanoparticles 14 in the liquid crystal molecular layer 13 shown in Figure 1, and will form a system with liquid crystal molecules 131 when the ferroelectric nanoparticles 14 are in the liquid crystal system, because With the existence of the nanoparticles 14, the sensitivity of the liquid crystal molecules to the electric field will also be greatly increased, so that the liquid crystal molecules can be effectively driven with a relatively small driving voltage, and the low energy consumption of the liquid crystal display device is realized.

However, the disadvantage of such a research method is that when ferroelectric nanoparticles 14 and liquid crystal molecules 131 coexist in a system, the mixing ratio of ferroelectric nanoparticles 14 is difficult to control accurately, resulting in different display areas of the liquid crystal display device. There may be differential performance, which reduces the reliability of liquid crystal display devices in tests such as afterimage, high and low temperature operation, and storage. Due to the above problems, liquid crystal display devices with such a structure are still not mass-producible.

Contents of the invention

Embodiments of the present invention provide a liquid crystal display panel, a manufacturing method thereof, and a display device, which can reduce the driving voltage of the liquid crystal display device and improve product quality.

According to an aspect of the embodiments of the present invention, a liquid crystal display panel is provided, including a first substrate formed into a cell, a second substrate, and a liquid crystal molecule layer located between the first substrate and the second substrate.

An alignment layer is formed on the surface of the first substrate and/or the second substrate close to the liquid crystal molecule layer;

The alignment layer is doped with conductive particles.

On the other hand, an embodiment of the present invention further provides a display device, the display device comprising the above-mentioned liquid crystal display panel.

In yet another aspect of the embodiments of the present invention, a method for manufacturing a liquid crystal display panel is also provided, including:

forming an alignment layer on the surface of the first substrate and/or the second substrate, the alignment layer is doped with conductive particles;

molding the first substrate and the second substrate into a box, and the alignment layer is located in the box;

Liquid crystals are filled between the first substrate and the second substrate formed in a cell to form a liquid crystal molecular layer.

Embodiments of the present invention provide a liquid crystal display panel, a manufacturing method thereof, and a display device. The liquid crystal display panel includes a cell-forming first substrate, a second substrate, and a layer of liquid crystal molecules located between the first substrate and the second substrate, wherein, An alignment layer is formed on the surface of the first substrate and/or the second substrate near the liquid crystal molecular layer, and conductive particles are doped in the alignment layer. In this way, by adding conductive particles to the liquid crystal alignment layer system, there is no need to change the composition of the liquid crystal in the liquid crystal cell system, and while reducing the driving voltage of the liquid crystal display device, it can effectively avoid the problem of the coexistence of conductive particles and liquid crystal molecules in the liquid crystal alignment layer system. The problem of reduced reliability of quality testing in one system has significantly improved the quality of liquid crystal display products.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural view of a liquid crystal display panel in the prior art;

FIG. 2 is a schematic structural diagram of a liquid crystal display panel provided by an embodiment of the present invention;

3 is a schematic structural view of an alignment layer doped with conductive particles without rubbing alignment treatment;

4 is a schematic structural view of an alignment layer doped with conductive particles after rubbing alignment treatment;

5 is a schematic flowchart of a method for manufacturing a liquid crystal display panel provided by an embodiment of the present invention;

FIG. 6 is a schematic flow chart of forming an alignment layer doped with conductive particles.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The liquid crystal display panel provided by the embodiment of the present invention, as shown in FIG. 2 , includes a cell-molded first substrate 21 , a second substrate 22 and a liquid crystal molecule layer 23 between the first substrate 21 and the second substrate 22 .

Wherein, an alignment layer 24 is formed on the surface of the first substrate 21 and/or the second substrate 22 near the liquid crystal molecule layer 23 .

The alignment layer 24 is doped with conductive particles 25 .

The liquid crystal display panel provided by the embodiment of the present invention, the liquid crystal display panel includes a first substrate, a second substrate and a liquid crystal molecular layer located between the first substrate and the second substrate, wherein the first substrate and/or the second substrate An orientation layer is formed on the surface of the second substrate close to the liquid crystal molecular layer, and conductive particles are doped in the orientation layer. In this way, by adding conductive particles to the liquid crystal alignment layer system, there is no need to change the composition of the liquid crystal in the liquid crystal cell system, and while reducing the driving voltage of the liquid crystal display device, it can effectively avoid the problem of the coexistence of conductive particles and liquid crystal molecules in the liquid crystal alignment layer system. The problem of reduced reliability of quality testing in one system has significantly improved the quality of liquid crystal display products.

It should be noted that the alignment layer 24 is mainly used for aligning the liquid crystal molecules, so that the liquid crystal molecules have a certain initial alignment in the non-energized state, and the alignment layer 24 can be made of various known alignment layer materials. This is not a limitation. The alignment layer 24 can be formed on the surface of the first substrate 21 and/or the second substrate 22. In the liquid crystal display panel shown in FIG. 24 as an example.

Specifically, before forming the alignment layer 24, a certain amount of conductive particles 25 can be doped into the alignment layer material, by coating the alignment layer material doped with conductive particles 25 on the first substrate 21 or the second substrate 22, and finally cured and molded to form an alignment layer doped with conductive particles 25.

In the embodiment of the present invention, the conductive particles 25 can specifically be ferroelectric nanoparticles. Although the ferroelectric nanoparticles are outside the liquid crystal system, there is an interaction force between them and the liquid crystal molecules, so that the anchoring energy increases. At the same time, when there is When an external electric field exists, the director of the ferroelectric nanoparticle will be consistent with the direction of the electric field, making the liquid crystal molecules deflect more easily under the induction of the director of the ferroelectric nanoparticle, thereby effectively reducing the driving voltage and driving energy consumption. .

Further, the liquid crystal molecule layer 23 may include liquid crystal molecules 231 and high molecular polymers.

As shown in FIG. 2 , around the liquid crystal molecules 231 there are polymer chain segments 232 formed of polymers. Due to the presence of the polymer segment 232, there is an interaction force between the liquid crystal molecules 231 and the polymer segment 232, which makes the liquid crystal molecules 231 more likely to deflect under the action of voltage, thereby improving the response speed of the liquid crystal display device. Especially for the case where the liquid crystal molecules 231 are vertically deflected under the action of the voltage, the upward deflection speed of the liquid crystal molecules 231 is greatly accelerated, thereby effectively improving the response speed of the liquid crystal display device.

However, for a conventional display device with a polymer chain segment liquid crystal system, especially when the liquid crystal molecules 231 are vertically deflected under the action of a voltage, due to the existence of the polymer chain segment, when the driving voltage of the liquid crystal molecules is removed , such a system will prevent the liquid crystal molecules from returning to the initial state, which will cause the liquid crystal molecules to fall longer, and will increase the driving power consumption, and the product quality will also decline. In the liquid crystal display device shown in FIG. 2 , due to the existence of ferroelectric nanoparticles, the director of the ferroelectric nanoparticles will drive the overall movement of the liquid crystal system, further improving the rise time, and improving the fall time to a certain extent. The overall response will be increased, thereby further improving the response speed of the liquid crystal display device.

Further, the surface of the alignment layer 24 may be the surface of the alignment layer treated by a rubbing alignment process.

Specifically, as shown in Figure 3, the ferroelectric nanoparticles are originally arranged randomly in the alignment layer 24. After rubbing the alignment layer 24 for orientation treatment, due to the electrostatic interaction between the rubbing cloth and the alignment layer material, the ferroelectric The nanoparticles are arranged according to the friction direction, and the ferroelectric nanoparticles themselves do not change, but point to the sagittal direction of the electric field under the action of the electrostatic force, as shown in Figure 4. In this way, the ferroelectric nanoparticles can be further improved. The inductive effect of liquid crystal molecules further reduces the driving voltage of the liquid crystal display device.

It should be noted that the TFT-LCD array substrate provided by the embodiment of the present invention can be applied to ADS (Advanced-Super Dimension Switch, advanced super-dimensional field switch) type, IPS (In Plane Switch, transverse electric field effect) type, TN (Twist Nematic, twisted nematic) and other types of liquid crystal display devices. Among them, the ADS technology forms a multi-dimensional electric field through the parallel electric field generated by the edge of the pixel electrode in the same plane and the vertical electric field generated between the pixel electrode layer and the common electrode layer, so that all aligned liquid crystal molecules between the pixel electrodes and directly above the electrodes in the liquid crystal cell are aligned. Rotation conversion can be generated, thereby improving the working efficiency of the plane alignment system liquid crystal and increasing the light transmission efficiency.

No matter what kind of liquid crystal display device is mentioned above, it includes a color filter substrate and an array substrate formed in a cell. The difference is that the common electrodes of the TN display device are arranged on the color filter substrate, and the pixel electrodes are arranged on the array substrate; the common electrodes and the pixel electrodes of the ADS display device and the IPS display device are both arranged on the array substrate.

Specifically, as shown in FIG. 2 , in the embodiment of the present invention, an ADS type display device is taken as an example for description. Wherein, the first substrate 21 may be an array substrate, and the second substrate 22 may be a color filter substrate. As shown in FIG. 2 , the first substrate 21 may specifically include:

A transparent substrate 211 , and a planar first transparent electrode 212 formed on the surface of the transparent substrate 211 .

Striped second transparent electrodes 213 are formed between the first transparent electrodes 212 and the alignment layer 24 .

There is an insulating layer 214 between the first transparent electrode 213 and the second transparent electrode 213 .

In the array substrate of the ADS type display device, the common electrode and the pixel electrode are arranged in different layers. Optionally, the electrode on the upper layer includes a plurality of strip-shaped electrodes, and the electrode on the lower layer may include a plurality of strip-shaped electrodes. The electrodes may be in the form of flat plates. In the embodiment of the present invention, the description is made by taking the planar structure in which the electrodes located in the lower layer are flat plates as an example. Wherein, the arrangement of different layers refers to at least two kinds of patterns, and the arrangement of at least two kinds of patterns in different layers refers to forming at least two patterns of at least two films through a patterning process. The arrangement of the two patterns in different layers means that one pattern is formed by two layers of films through a patterning process. For example, the different layer arrangement of the common electrode and the pixel electrode refers to: the lower layer electrode is formed by the first layer of transparent conductive film through the patterning process, and the upper layer electrode is formed by the second layer of transparent conductive film through the patterning process, wherein the lower layer electrode is the common electrode (or pixel electrode), and the upper electrode is a pixel electrode (or common electrode).

The array substrate with such a structure provided by the embodiment of the present invention can also be applied to an IPS display device. The difference from the ADS display device is that the common electrode and the pixel electrode are arranged on the same layer, and the common electrode includes multiple A first strip-shaped electrode, the pixel electrode includes a plurality of second strip-shaped electrodes, and the first strip-shaped electrodes and the second strip-shaped electrodes are arranged at intervals. Wherein, setting on the same layer refers to at least two patterns; setting at least two patterns on the same layer refers to forming at least two patterns on the same film through a patterning process. For example, setting the common electrode and the pixel electrode on the same layer means that the pixel electrode and the common electrode are formed from the same transparent conductive film through a patterning process. Wherein, the pixel electrode refers to an electrode electrically connected to the data line through a switch unit (for example, a thin film transistor), and the common electrode refers to an electrode electrically connected to the common electrode line.

A display device provided by an embodiment of the present invention includes the above-mentioned liquid crystal display panel.

It should be noted that the display device provided by the present invention can be any product or component with a display function such as a liquid crystal panel, a liquid crystal TV, a liquid crystal display, a digital photo frame, a mobile phone, and a tablet computer.

The display device provided by the embodiment of the present invention includes a liquid crystal display panel, and the liquid crystal display panel includes a first substrate formed into a cell, a second substrate, and a layer of liquid crystal molecules located between the first substrate and the second substrate, wherein the first An alignment layer is formed on the surface of the substrate and/or the second substrate near the liquid crystal molecule layer, and the alignment layer is doped with conductive particles. In this way, by adding conductive particles to the liquid crystal alignment layer system, there is no need to change the composition of the liquid crystal in the liquid crystal cell system, and while reducing the driving voltage of the liquid crystal display device, it can effectively avoid the problem of the coexistence of conductive particles and liquid crystal molecules in the liquid crystal alignment layer system. The problem of reduced reliability of quality testing in one system has significantly improved the quality of liquid crystal display products.

An embodiment of the present invention also provides a method for manufacturing a liquid crystal display panel, as shown in FIG. 5 , including:

S501, forming an alignment layer on the surface of the first substrate and/or the second substrate, and the alignment layer is doped with conductive particles.

S502. Form the first substrate and the second substrate into a box, and the alignment layer is located in the box.

S503 , filling liquid crystal between the first substrate and the second substrate formed in the cell to form a layer of liquid crystal molecules.

In the method for manufacturing a liquid crystal display panel provided by an embodiment of the present invention, the liquid crystal display panel includes a cell-molded first substrate, a second substrate, and a liquid crystal molecule layer located between the first substrate and the second substrate, wherein the first substrate and /or an alignment layer is formed on the surface of the second substrate close to the liquid crystal molecular layer, and the alignment layer is doped with conductive particles. In this way, by adding conductive particles to the liquid crystal alignment layer system, there is no need to change the composition of the liquid crystal in the liquid crystal cell system, and while reducing the driving voltage of the liquid crystal display device, it can effectively avoid the problem of the coexistence of conductive particles and liquid crystal molecules in the liquid crystal alignment layer system. The problem of reduced reliability of quality testing in one system has significantly improved the quality of liquid crystal display products.

It should be noted that the alignment layer is mainly used to align the liquid crystal molecules, so that the liquid crystal molecules have a certain initial alignment in the non-energized state, and the alignment layer can be made of various known alignment layer materials, which is not included in the present invention. No restrictions. The alignment layer can be formed on the surface of the first substrate and/or the second substrate. In the liquid crystal display panel shown in FIG. .

Further, the liquid crystal molecule layer 23 may include liquid crystal molecules 231 and high molecular polymers.

As shown in FIG. 2 , around the liquid crystal molecules 231 there are polymer chain segments 232 formed of polymers. Due to the presence of the polymer segment 232, there is an interaction force between the liquid crystal molecules 231 and the polymer segment 232, which makes the liquid crystal molecules 231 more likely to deflect under the action of voltage, thereby improving the response speed of the liquid crystal display device. Especially for the case where the liquid crystal molecules 231 are vertically deflected under the action of the voltage, the upward deflection speed of the liquid crystal molecules 231 is greatly accelerated, thereby effectively improving the response speed of the liquid crystal display device.

However, for a conventional display device with a polymer chain segment liquid crystal system, especially when the liquid crystal molecules 231 are vertically deflected under the action of a voltage, due to the existence of the polymer chain segment, when the driving voltage of the liquid crystal molecules is removed , such a system will prevent the liquid crystal molecules from returning to the initial state, which will cause the liquid crystal molecules to fall longer, and will increase the driving power consumption, and the product quality will also decline. In the liquid crystal display device shown in FIG. 2 , due to the existence of ferroelectric nanoparticles, the director of the ferroelectric nanoparticles will drive the overall movement of the liquid crystal system, further improving the rise time, and improving the fall time to a certain extent. The overall response will be increased, thereby further improving the response speed of the liquid crystal display device.

Specifically, as shown in FIG. 6, step S501, forming an alignment layer on the surface of the first substrate and/or the second substrate may include:

S601. Coating an alignment layer material doped with conductive particles on the surface of the first substrate and/or the second substrate.

In the embodiment of the present invention, the conductive particles may specifically be ferroelectric nanoparticles. Although the ferroelectric nanoparticles are outside the liquid crystal system, there is an interaction force between them and the liquid crystal molecules, so that the anchoring energy increases. At the same time, when there is an external When an electric field exists, the directors of the ferroelectric nanoparticles will be consistent with the direction of the electric field, making the liquid crystal molecules deflect more easily under the induction of the directors of the ferroelectric nanoparticles, thereby effectively reducing the driving voltage and driving energy consumption.

S602, performing solidification treatment on the alignment layer material, and cooling the solidified alignment layer material to obtain an alignment layer.

For example, high temperature curing treatment can be performed on the alignment layer material coated on the substrate surface, the temperature is kept at 230 + 5°C, and the duration is 1200 + 10Sec. After the high temperature curing treatment, the timing time of the alignment layer material is 120 + 10Sec. Cool naturally to form a liquid crystal alignment layer.

S603, performing rubbing alignment treatment on the surface of the alignment layer.

Specifically, as shown in Figure 3, the ferroelectric nanoparticles are originally arranged randomly in the alignment layer 24. After rubbing the alignment layer 24 for orientation treatment, due to the electrostatic interaction between the rubbing cloth and the alignment layer material, the ferroelectric The nanoparticles are arranged according to the friction direction, and the ferroelectric nanoparticles themselves do not change, but point to the sagittal direction of the electric field under the action of the electrostatic force, as shown in Figure 4. In this way, the ferroelectric nanoparticles can be further improved. The inductive effect of liquid crystal molecules further reduces the driving voltage of the liquid crystal display device.

It should be noted that the TFT-LCD array substrate provided by the embodiment of the present invention can be applied to the production of ADS type, IPS type, TN type liquid crystal display devices and other types. No more examples here.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. a display panels, comprises the first substrate of box moulding, second substrate and the layer of liquid crystal molecule between described first substrate and described second substrate, it is characterized in that,

Described first substrate and/or described second substrate are formed with oriented layer near described layer of liquid crystal molecule one side surface;

In described oriented layer doped with conducting particles.

2. display panels according to claim 1, is characterized in that, described layer of liquid crystal molecule comprises liquid crystal molecule and high molecular polymer.

3. display panels according to claim 1, is characterized in that, the surface of described oriented layer is for adopting the oriented layer surface of friction orientation PROCESS FOR TREATMENT.

4. according to the arbitrary described display panels of claim 1-3, it is characterized in that, described first substrate comprises:

Transparency carrier, and the first planar transparency electrode that is formed on described transparency carrier surface;

Between described the first transparency electrode and described oriented layer, be formed with the second transparency electrode that strip is intervally arranged;

Between described the first transparency electrode and described the second transparency electrode, there is insulation course.

5. according to the arbitrary described display panels of claim 1-3, it is characterized in that, described conducting particles comprises ferroelectric nano particle.

6. a display device, is characterized in that, described display device comprises the display panels as described in as arbitrary in claim 1-5.

7. a liquid crystal display panel preparation method, is characterized in that, comprising:

On the surface of first substrate and/or second substrate, form oriented layer, in described oriented layer doped with conducting particles;

By described first substrate and described second substrate, to box moulding, described oriented layer is positioned at box;

Filling liquid crystal between to the described first substrate of box moulding and described second substrate, forms layer of liquid crystal molecule.

8. liquid crystal display panel preparation method according to claim 7, is characterized in that, described layer of liquid crystal molecule comprises liquid crystal molecule and high molecular polymer.

9. according to the liquid crystal display panel preparation method described in claim 7 or 8, it is characterized in that, the described surface at first substrate and/or second substrate forms oriented layer and comprises:

Surface at first substrate and/or second substrate applies the oriented layer material doped with conducting particles;

Described oriented layer material is cured to processing, to carrying out the described oriented layer material of overcuring processing, carries out the cooling oriented layer that obtains;

Friction orientation processing is carried out in the surface of described oriented layer.

10. according to the liquid crystal display panel preparation method described in claim 7 or 8, it is characterized in that, described conducting particles comprises ferroelectric nano particle.

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