WO2015180375A1

WO2015180375A1 - Liquid crystal display panel and display device

Info

Publication number: WO2015180375A1
Application number: PCT/CN2014/088761
Authority: WO
Inventors: 王英涛
Original assignee: 京东方科技集团股份有限公司
Priority date: 2014-05-30
Filing date: 2014-10-16
Publication date: 2015-12-03
Also published as: CN104020615A

Abstract

Provided is a liquid crystal display panel, comprising a first substrate (1) and a second substrate (2) which are oppositely arranged, and a negative liquid crystal layer (3) located between the first substrate (1) and the second substrate (2); a first common electrode (12) and a first pixel electrode (11) which are located on one side, close to the negative liquid crystal layer (3), of the first substrate (1) and are isolated from each other; and a second common electrode (22) and a second pixel electrode (21) which are located on the second substrate (2) and are isolated from each other, wherein at least one of the first common electrode (12) and the first pixel electrode (11) is a first slit electrode comprising a plurality of strip electrodes (111); at least one of the second common electrode (22) and the second pixel electrode (21) is a second slit electrode comprising a plurality of strip electrodes (111); and a first set included angle (α) is formed between the extrusion direction of the strip electrodes (111) in the first slit electrode and the extrusion direction of the strip electrodes (111) in the second slit electrode. Also provided is a display device. The liquid crystal display panel and display device can shorten the ON-state response time and the OFF-state response time of the liquid crystal display panel, improve the light transmittance, and improve the display quality of the display device.

Description

Liquid crystal display panel and display device

Technical field

Embodiments of the present disclosure relate to a liquid crystal display panel and a display device.

Background technique

At present, the display modes of TFT-LCD (Thin Film Transistor Liquid Crystal Display) mainly include TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, and IPS (In-Plane- Switching, plane direction conversion mode and ADS (ADvanced Super Dimension Switch) mode. Advanced super-dimensional field switching 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 chromatic aberration, no push mura, etc. advantage. For different applications, ADS technology has improved high-transmission I-ADS technology, high aperture ratio H-ADS and high-resolution S-ADS technology.

The response speed of the liquid crystal display of any of the above modes is related to the on-state response time of the pixel and the off-state response time. The shorter the on-state response time and the off-state response time, the faster the response speed.

The on-state response time and the off-state response time are related to the liquid crystal viscosity coefficient and the thickness of the liquid crystal layer. The larger the viscosity coefficient is, the longer the on-state response time and the off-state response time are, and the thicker the liquid crystal layer is, the on-state response time is. The longer the response time is.

Generally, the liquid crystal molecules in the liquid crystal display are positive liquid crystals, and the long axes of the positive liquid crystals are arranged in the direction of the electric field lines. When the electric field in the liquid crystal display is a transverse electric field, the liquid crystal molecules are arranged obliquely with respect to the substrate along the direction of the electric field lines, and the light transmittance is different depending on the inclination angle.

In order to reduce the on-state response time and the off-state response time of the liquid crystal molecules, a common electrode and a pixel electrode are disposed on the first substrate and the second substrate on both sides of the liquid crystal layer, between the pixel electrode and the common electrode on each substrate A transverse electric field is generated to control the alignment of the liquid crystal molecules in the direction of the transverse electric field, and the liquid crystal molecules are deflected from the vertical direction (initial direction) toward the transverse electric field. And the common electrode (or the pixel electrode) on the first substrate and the pixel electrode (or the common electrode) on the second substrate are slit electrodes, the slit electrode includes a plurality of strip electrodes, and the strip electrodes on the first substrate And the strip electrodes on the second substrate are parallel to each other, the overlapping area between the two is large, the vertical electric field intensity is large, and the light is transmitted through The rate of passing is low. Since the initial direction of the liquid crystal molecules is a vertical direction, and the vertical electric field intensity between the strip electrodes on the first substrate and the strip electrodes on the second substrate is large, the liquid crystal molecules are deflected by the horizontal electric field and the vertical electric field. The vertical electric field suppresses the deflection of the liquid crystal molecules along the transverse electric field, which adversely affects the on-state response time and the off-state response time of the liquid crystal molecules.

Summary of the invention

Embodiments of the present disclosure provide a liquid crystal display panel and a display device for reducing an on-state response time and an off-state response time of a liquid crystal display panel, thereby improving light transmittance, thereby improving display quality of the display device.

At least one embodiment of the present disclosure provides a liquid crystal display panel including: a first substrate and a second substrate disposed opposite to each other, and a negative liquid crystal layer between the first substrate and the second substrate;

The liquid crystal display panel further includes: a first common electrode and a first pixel electrode which are insulated from each other on a side of the first substrate adjacent to the negative liquid crystal layer;

a second common electrode and a second pixel electrode on the second substrate that are insulated from each other on a side of the negative liquid crystal layer;

At least one of the first common electrode and the first pixel electrode is a first slit electrode including a plurality of strip electrodes;

At least one of the second common electrode and the second pixel electrode is a second slit electrode including a plurality of strip electrodes;

The extending direction of the strip electrodes in the first slit electrode and the extending direction of the strip electrodes in the second slit electrode have a first angle.

In an embodiment in accordance with the present disclosure, the first included angle is 70-90°.

In an embodiment of the present disclosure, the liquid crystal display panel further includes:

a first alignment layer on the first substrate in contact with the negative liquid crystal layer and a second alignment layer on the second substrate in contact with the negative liquid crystal layer;

The angle β between the rubbing direction of the first alignment layer and the extending direction of the strip electrodes in the first slit electrode or the second strip electrode satisfies the following formula:

β = (α/2) ± 5 °.

In an embodiment in accordance with the present disclosure, the first included angle is 90°, and an angle between a rubbing direction of the first alignment layer and a strip electrode in the first slit electrode is 45°.

In an embodiment in accordance with the present disclosure, the rubbing directions of the first alignment layer and the second alignment layer are the same.

a first polarizer located on a side of the first substrate away from the negative liquid crystal layer;

a second polarizer located on a side of the second substrate away from the negative liquid crystal layer;

Wherein the transmission axis of the first polarizer is the same as the rubbing direction of the first alignment layer;

The transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizer.

In an embodiment according to the present disclosure, the first common electrode and the first pixel electrode are respectively the first slit electrode including a plurality of strip electrodes, and the two are disposed in the same layer;

The second common electrode and the second pixel electrode are respectively the second slit electrode including a plurality of strip electrodes, and the two are disposed in the same layer;

Wherein the strip electrodes in the first common electrode and the first pixel electrode extend in the same direction and are arranged at intervals;

The strip electrodes of the second common electrode and the second pixel electrode extend in the same direction and are arranged at intervals.

In an embodiment according to the present disclosure, the first common electrode is a planar electrode, and the first pixel electrode is the first slit electrode including a plurality of strip electrodes, and the An insulating layer is insulated; the second common electrode is a planar electrode, and the second pixel electrode is the second slit electrode including a plurality of strip electrodes, and the second insulating layer is passed between the two insulation;

or

The first pixel electrode is a planar electrode, and the first common electrode is the first slit electrode including a plurality of strip electrodes, and the two are insulated by a first insulating layer; the second The pixel electrode is a planar electrode, and the second common electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer.

In an embodiment according to the present disclosure, the first common electrode and the first pixel electrode are respectively the first slit electrode including a plurality of strip electrodes, and the two are disposed in the same layer; the first common electrode and The strip electrodes in the first pixel electrode extend in the same direction and are arranged at intervals;

The second common electrode is a planar electrode, and the second pixel electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer; or the The two pixel electrode is a planar electrode, and the second common electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer.

At least one embodiment of the present disclosure also provides a display device including the liquid crystal display panel of any of the modes.

In summary, the liquid crystal display panel according to an embodiment of the present disclosure is filled with negative liquid crystal molecules, and the negative liquid crystal molecules are deflected in the water surface by the transverse electric field to change the transmittance of the light. The deflection of the liquid crystal molecules is only affected by the horizontal component of the electric field, and the electric field of the vertical component does not contribute to the deflection of the liquid crystal molecules in the horizontal plane. The off-state response time τ _off and the on-state response time τ _{on of the} liquid crystal display panel are not affected by the vertical component of the electric field between the first substrate and the second substrate. Moreover, the extending direction of the strip electrodes in the first slit electrode and the extending direction of the strip electrodes in the second slit electrode according to the embodiment of the present disclosure have a first set angle α between It is not parallel, so the overlap between the two is small and the transmittance of light is high. In addition, in the embodiment according to the present disclosure, since the common electrode and the pixel electrode are disposed on the first substrate and the second substrate, the liquid crystal layer is under the first electric field corresponding to the first substrate and the second electric field corresponding to the second substrate. Deflection is equivalent to reducing the thickness of the liquid crystal cell, making the thickness of the liquid crystal cell equivalent to one-half of the original, reducing the off-state response time τ _off and the on-state response time τ _{on of} the liquid crystal display panel, effectively improving the response of the liquid crystal molecules. Speed improves the display quality of the image.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present disclosure, and are not to limit the disclosure. .

1 is a schematic cross-sectional view of a liquid crystal display panel when no voltage is applied according to an embodiment of the present disclosure;

2 is a schematic structural view of a first slit electrode including a plurality of strip electrodes according to an embodiment of the present disclosure;

3 is a schematic diagram of projection of strip electrodes in a strip electrode and a second common electrode in a first pixel in a same plane according to an embodiment of the present disclosure;

4 is a schematic structural view of the liquid crystal display panel shown in FIG. 1 after an electric field is applied;

FIG. 5 is a second schematic cross-sectional view of a liquid crystal display panel when no voltage is applied according to an embodiment of the present disclosure; FIG.

6 is a schematic enlarged view showing the second substrate shown in FIG. 5 and its upper structure and surrounding liquid crystal molecules;

7 is a schematic enlarged view showing the distribution of liquid crystal molecules on the first substrate and the upper structure and the surrounding structure shown in FIG. 5;

8 is a schematic enlarged view showing the distribution of the second substrate and the structure thereon and surrounding liquid crystal molecules after the application of the electric field shown in FIG. 6;

FIG. 9 is an enlarged schematic view showing the distribution of the first substrate and the upper structure thereof and the surrounding liquid crystal molecules after the application of the electric field shown in FIG. 7; FIG.

10 is a third schematic cross-sectional view of a liquid crystal display panel when no voltage is applied according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a first polarizer and a second polarizer according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a second pixel electrode and a second common electrode on a second substrate according to an embodiment of the present disclosure;

FIG. 13 is a fourth schematic cross-sectional view of a liquid crystal display panel when no voltage is applied according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram showing relationship between light transmittance and elapsed time t after simulation of a liquid crystal display panel provided by a comparative example and an embodiment provided by an embodiment of the present disclosure.

detailed description

The technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It is apparent that the described embodiments are part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present disclosure without departing from the scope of the invention are within the scope of the disclosure.

The embodiments of the present disclosure provide a liquid crystal display panel and a display device for reducing the on-state response time and the off-state response time of the liquid crystal display panel, and improving the transmittance of the light, thereby improving the display quality of the display device.

Referring to FIG. 1 , an embodiment of the present disclosure provides a liquid crystal display panel, including:

a first substrate 1 and a second substrate 2 disposed opposite to each other, and a negative liquid crystal layer 3 between the first substrate 1 and the second substrate 2;

The first common electrode 12 and the first pixel electrode 11 are insulated from each other on the first substrate 1 near the side of the negative liquid crystal layer 3;

a second common electrode 22 located on the second substrate 2 and insulated from each other on the side of the negative liquid crystal layer 3 And a second pixel electrode 21;

At least one of the first common electrode 12 and the first pixel electrode 11 is a first slit electrode including a plurality of strip electrodes 111 as shown in FIG. 2; at least one of the second common electrode 22 and the second pixel electrode 21 is Similar to the second slit electrode including a plurality of strip electrodes as shown in FIG.

3 is a schematic view showing the projection of the strip electrodes 111 and the second common electrodes 22 in the first pixel electrode 11 on the same plane (the plane on which the first substrate or the second substrate are located). As shown in FIG. 3, the extending direction of the strip electrodes in the first slit electrode and the extending direction of the strip electrodes in the second slit electrode have a first set angle α.

The characteristics of the negative liquid crystal layer of the present disclosure determine the distribution of the short axis along the direction of the electric field lines, and the long axis is distributed along the direction perpendicular to the electric field lines.

FIG. 1 is an initial arrangement state and an electric field distribution state of liquid crystal molecules when the liquid crystal display panel is not energized. As can be seen from FIG. 1, when the liquid crystal display panel is not energized, the initial alignment direction of the liquid crystal molecules in the negative liquid crystal layer 3 is parallel to the first substrate 1 or the second substrate 2, that is, the long axis of the liquid crystal molecules in the negative liquid crystal layer 3. Arranged in parallel with the first substrate 1 or the second substrate 2. There is no electric field distribution in the region where the liquid crystal layer 3 is located.

Fig. 4 is a view showing the electric field distribution and the state of liquid crystal molecules when the liquid crystal display panel shown in Fig. 1 is energized. The curve with arrows in Figure 4 is the electric field line. As can be seen from FIG. 4, a transverse electric field is generated between the first pixel electrode 11 and the first common electrode 12 on the first substrate 1. A transverse electric field is generated between the second pixel electrode 21 and the second common electrode 22 on the second substrate 2.

The off-state response time τ _off and the on-state response time τ _{on of the} liquid crystal display panel are determined by the formula (1-1) and the formula (1-2), respectively;

γ ₁ is the viscosity coefficient of the liquid crystal, d is the thickness of the liquid crystal cell, K is the elastic constant of the liquid crystal molecule, ε ₀ is the vacuum dielectric constant, ε is the dielectric constant of the liquid crystal, and V _on is the voltage applied between the pixel electrode and the common electrode. V _th is the threshold voltage at which the liquid crystal display panel is turned on. It can be known from the formula (1-1) and the formula (1-2) that the response speed of the liquid crystal molecules can be improved by changing at least one of these parameters, for example, reducing the thickness d of the liquid crystal cell, decreasing the viscosity coefficient γ ₁ , increasing Large V _on , increase the dielectric constant ε, and the like. The present disclosure generates a lateral electric field between a common electrode and a pixel electrode on the same substrate by providing a common electrode and a pixel electrode on both the first substrate and the second substrate, and adopting a negative liquid crystal molecule is equivalent to reducing the thickness of the liquid crystal cell. This can improve the on-state response speed and the off-state response speed of the liquid crystal molecules.

In addition, since the liquid crystal display panel of the present disclosure is filled with negative liquid crystal molecules, it operates in a negative liquid crystal molecular mode. The working principle of the liquid crystal display panel of the negative liquid crystal molecular mode is different from that of the liquid crystal display panel of the positive liquid crystal molecular mode. The action of the liquid crystal molecules in the transverse electric field shown in Fig. 4 is deflected in the horizontal plane to change the transmittance of the light. The deflection of the liquid crystal molecules is only affected by the horizontal component of the electric field, and the electric field of the vertical component has no effect on the deflection of the liquid crystal molecules in the horizontal plane. The off-state response time τ _off and the on-state response time τ _{on of the} liquid crystal display panel are not affected by the electric field of the vertical component between the first substrate and the second substrate.

Moreover, the extending direction of the strip electrodes in the first slit electrode of the present disclosure and the extending direction of the strip electrodes in the second slit electrode have a first set angle α, which are disposed non-parallel, and therefore, The positive overlapping surface between the two is small, the longitudinal electric field strength between the first substrate and the second substrate is reduced, the degree of light blocking of the negative liquid crystal molecules is reduced, and the transmittance of the liquid crystal display panel is improved, and the transmittance is improved. The display quality of the image.

For example, in the liquid crystal display panel provided by the above embodiment, the first set angle between the extending direction of the strip electrodes in the first slit electrode and the extending direction of the strip electrodes in the second slit electrode is 70. ~90°.

When the set angle between the strip electrode in the first slit electrode and the strip electrode in the second slit electrode is 90°, the vertical overlap faces of the two are the smallest, the first substrate and the second substrate The longitudinal electric field intensity between the first substrate and the second substrate is the same. The initial orientation of the liquid crystal molecules of the liquid crystal display panel provided by the above embodiments is provided on the first substrate and the second substrate. Orientation layer orientation.

For example, on the basis of the liquid crystal display panel shown in FIG. 1, as shown in FIG. 5, the liquid crystal display panel further includes:

a first alignment layer 13 on the first substrate 1 in contact with the negative liquid crystal layer 3;

A second alignment layer 23 on the second substrate 2 in contact with the negative liquid crystal layer 3.

6 and FIG. 7 are respectively an enlarged schematic view showing the distribution of liquid crystal molecules on the second substrate 2 and its upper structure and the surrounding structure shown in FIG. 5, and an enlarged view showing the distribution of liquid crystal molecules on the first substrate 1 and the structure thereon and the surrounding liquid crystals shown in FIG.

In an embodiment of the present disclosure, a rubbing direction of the first alignment layer and the first slit The angle β between the extending directions of the strip electrodes in the electrode or the second strip electrode satisfies the formula (1-3):

β=(α/2)±5° (1-3)

The formula (1-3) β=(α/2)±5° can be understood as β, which is any value in the range of (α/2)-5° to (α/2)+5°, including β. = (α/2) - 5 °, β = α / 2 or β = (α / 2) + 5 ° and the like.

For example, the first set angle is α=90°, and the angle between the rubbing direction of the first alignment layer and the strip electrode in the first slit electrode is 45°. The angle between the rubbing direction of the first alignment layer and the strip electrodes in the second slit electrode is also 45°.

For example, as shown in FIG. 6, the rubbing direction of the second alignment layer 23 on the second substrate 2 (as indicated by the arrow) and the strip electrode 111 in the second slit electrode are between 35 and 45 degrees. . Referring to Fig. 7, the rubbing direction γ of the first alignment layer 13 on the first substrate 1 (as indicated by a broken line arrow) and the strip electrode 111 in the first slit electrode is 35 to 45°.

For example, an angle between a rubbing direction of the first alignment layer and a strip electrode in the first slit electrode is 45°; a rubbing direction of the second alignment layer and the second slit electrode The angle between the strip electrodes is 45°. The liquid crystal molecules are arranged in the rubbing direction, which is the initial orientation.

For example, the rubbing directions of the first alignment layer 13 and the second alignment layer 23 are the same. As shown in FIG. 1, the initial alignment directions of the liquid crystal molecules are the same.

When a voltage is applied to the pixel electrode and the common electrode on the first substrate and the second substrate, the electric field and the deflection of the liquid crystal molecules are as shown in FIGS. 8 and 9.

A voltage is applied to the strip electrode 111 of the second common electrode and the strip electrode 111 of the second pixel electrode shown in FIG. 6, and a transverse electric field is formed therebetween. The short axis of the liquid crystal molecules is parallel to the direction of the electric field lines, and the arrangement of the liquid crystal molecules is as shown in FIG.

A voltage is applied to the strip electrode 111 of the first common electrode and the strip electrode 111 of the first pixel electrode shown in FIG. 7, and a transverse electric field is formed therebetween. The short axis of the liquid crystal molecules is parallel to the direction of the electric field lines, and the arrangement of the liquid crystal molecules is as shown in FIG.

The strip electrodes shown in Fig. 8 and the strip electrodes shown in Fig. 9 are perpendicular to each other, and the electric field projection direction shown in Fig. 8 and the electric field projection direction shown in Fig. 9 are perpendicular to each other. The long-axis direction of the liquid crystal molecules shown in FIG. 8 is perpendicular to the long-axis direction of the liquid crystal molecules shown in FIG. Therefore, when an electric field is applied to the liquid crystal display panel, the arrangement of the liquid crystal molecules is as shown in FIG.

When the rubbing direction of the first alignment layer and the strip electrode in the first slit electrode are 45°, the rubbing direction of the second alignment layer and the strip in the second slit electrode Between electrodes When the included angle is 45°, and the voltage between the first pixel electrode and the first common electrode is equal to the voltage between the second pixel electrode and the second common electrode, the liquid crystal molecules and the second substrate in the vicinity of the first substrate The deflection angle of the nearby liquid crystal molecules is equal to the rubbing direction of any of the alignment layers, the transmittance of the light is uniform, and the image display effect is better.

Referring to FIG. 10, further, based on the structure of the liquid crystal display panel shown in FIG. 5, the method further includes:

a first polarizer 14 on a side of the first substrate 1 remote from the negative liquid crystal layer 3;

a second polarizer 24 on the second substrate 2 away from the side of the negative liquid crystal layer 3;

Wherein, the transmission axis of the first polarizer 14 is the same as the rubbing direction of the first alignment layer;

The transmission axis of the second polarizer 24 and the transmission axis of the first polarizer 14 are perpendicular to each other.

Referring to FIG. 11, a schematic perspective view of the first polarizer 14 and the second polarizer 24 is shown. The direction indicated by the arrow is the direction of the transmission axis. When the backlight light is incident from the light incident side of the liquid crystal display panel, after passing through the second polarizer 24, the linearly polarized light having a polarization direction parallel to the transmission axis of the second polarizer 24 is passed through the liquid crystal display panel to which the electric field is applied as shown in FIG. Thereafter, the phase of the linearly polarized light is changed by 90°, and the polarization direction of the linearly polarized light at this time is parallel to the transmission axis of the first polarizer 14. The light is smoothly transmitted through the first substrate to the light exiting side.

In the liquid crystal display panel provided by any one of the above aspects, at least one of the first common electrode 12 and the first pixel electrode 11 includes a plurality of strip electrodes of the first slit electrode 111; and the second common electrode 22 and the second pixel electrode 21 are at least One of the second slit electrodes including a plurality of strip electrodes.

The liquid crystal display panel includes the following embodiments according to different structures of the common electrode and the pixel electrode.

Embodiment 1:

On the basis of the liquid crystal display panel provided by any of the above embodiments, further, as shown in FIG. 2, the first common electrode 12 and the first pixel electrode 11 are respectively the first slit electrodes including the plurality of strip electrodes 111. And both are set in the same layer;

Referring to FIG. 12, the second common electrode 22 and the second pixel electrode 21 are respectively second slit electrodes including a plurality of strip electrodes 111, and are disposed in the same layer;

The strip electrodes 111 of the first common electrode 12 and the first pixel electrode 11 extend in the same direction and are arranged at intervals;

The strip electrodes 111 of the second common electrode 22 and the second pixel electrode 21 extend in the same direction and are arranged at intervals.

As shown in FIG. 1 , the liquid crystal display panel shown in FIG. 2 and FIG. 12 is similar to the first common electrode and the first pixel electrode in which the IPS mode is disposed on the first substrate, and the IPS mode is set on the second substrate. a second common electrode and a second pixel electrode.

Even if the potentials on the first pixel electrode and the second pixel electrode are equal, there is a potential difference between the first pixel electrode and the second common electrode, or there is a potential difference between the second pixel electrode and the first common electrode. Since the first common electrode and the second pixel electrode are disposed at the intersection or the vertical direction, the electric field between the two is small, which is advantageous for reducing the off-state response time τ _off and the on-state response time τ _on of the liquid crystal display panel in the negative liquid crystal mode. Similarly, since the second common electrode and the first pixel electrode are disposed at the intersection or the vertical direction, the electric field between the two is small, which is advantageous for reducing the off-state response time τ _off and the on-state response time τ of the liquid crystal display panel in the negative liquid crystal mode. _On .

In addition, the first common electrode, the first pixel electrode, the second common electrode, and the second pixel electrode of the present disclosure are both slit electrodes, and the liquid crystal molecules are negative liquid crystal molecules, and the transmittance of light is high. And the negative liquid crystal molecular mode liquid crystal display panel does not affect the transmittance of the light of the liquid crystal display panel.

If a positive liquid crystal is used, a vertical electric field exists in an overlapping region between the first common electrode (or the first pixel electrode) and the second common electrode (or the second pixel electrode), and liquid crystal molecules are vertically oriented, which greatly affects the liquid crystal panel. Transmittance rate.

Embodiment 2:

On the basis of the liquid crystal display panel provided by any of the above embodiments, further referring to FIG. 13, the first common electrode 12 is a planar electrode, and the first pixel electrode 11 is the first narrow strip including the plurality of strip electrodes. Slot the electrodes, and the two are insulated by the first insulating layer 15; the second common electrode 22 is a planar electrode, and the second pixel electrode 21 is a second slit electrode including a plurality of strip electrodes, and the two It is insulated by the second insulating layer 25.

Alternatively, the first pixel electrode 11 is a planar electrode, and the first common electrode 12 is the first slit electrode including a plurality of strip electrodes, and the two are insulated by the first insulating layer 15; The electrode 22 is a planar electrode, and the second pixel electrode 21 is a second slit electrode including a plurality of strip electrodes, and is insulated between the two by the second insulating layer 25.

This embodiment is similar to the first common electrode and the first pixel electrode in which the ADS mode is disposed on the first substrate, and the second common electrode and the second pixel electrode of the ADS mode are disposed on the second substrate.

Embodiment 3:

This embodiment is similar to the first common electrode and the first pixel electrode in which the IPS mode is disposed on the first substrate, and the second common electrode and the second pixel electrode of the ADS mode are disposed on the second substrate.

Embodiment 4:

The first common electrode and the first pixel electrode are respectively the first slit electrode including a plurality of strip electrodes, and the two are disposed in the same layer; the strip electrodes in the first common electrode and the first pixel electrode extend The directions are the same and are arranged at intervals;

This embodiment is similar to the first common electrode and the first pixel electrode in which the ADS mode is disposed on the first substrate, and the second common electrode and the second pixel electrode of the IPS mode are disposed on the second substrate.

In order to further explain the response speed of the liquid crystal display panel provided by the embodiment of the present disclosure, the present invention is faster. The simulation was performed using simulation software (TechWiz3D simulation software), and the electrode structure adopted periodic boundary conditions.

In order to more objectively show the difference between the structure of the liquid crystal display panel known to the inventors and the structure of the liquid crystal display panel of the present disclosure, comparisons were made between the comparative examples and the examples in the course of the simulation.

The comparative example is a positive liquid crystal mode liquid crystal display panel, and the embodiment is the liquid crystal display panel described in the above first embodiment of the present disclosure. The comparative example and the embodiment use the same negative liquid crystal, and both the first substrate and the second substrate are used. The strip electrodes, the width and the pitch of the strip electrodes of the comparative example and the embodiment are also completely the same, for example, the strip electrodes in the first pixel electrode and the second pixel electrode have a width of 3 μm, and the strips adjacent to the first pixel electrode The distance between the electrodes is 5 um, and the distance between the strip electrodes adjacent to the second pixel electrode is 5 um. The elastic constant K of the liquid crystal during the simulation is: K11=16, K22=8, K33=15, the dielectric coefficient ε∥=3.6 in the parallel direction of the liquid crystal layer, the dielectric coefficient ε⊥=8.6 in the vertical direction, and the liquid crystal viscosity coefficient. γ=61, Ne=1.581, No=1.48, the liquid crystal gap=3.6um, for the strip electrode on the array substrate, along the y-axis direction, and the strip electrode on the color filter substrate, along the x-axis The orientation is such that the azimuth angles of the liquid crystal molecules of the first substrate and the second substrate have an angle of 45° with respect to the strip electrodes. The transmission axes of the first polarizer and the second polarizer are orthogonal, and the optical axis of the second polarizer is 45° to the strip electrode, that is, along the long axis direction of the molecule.

The liquid crystal display panels provided by the comparative examples and the examples are respectively simulated, and the simulation results are shown in FIG. 14. FIG. 14 is a light transmittance (vertical axis, unit: 100%) and elapsed time t (horizontal axis) of the liquid crystal display panel. , the relationship of the unit ms). Comparative Example obtained _{_{τ on = 7.6ms, τ off =}} 14.5ms; the disclosure of the present embodiment obtained _{_{τ on = 6.7ms, τ off =}} 10.1ms, the present disclosure has 5.3ms compared with Comparative Example off-state response time Decline, the on-state response time has a 0.9ms drop, which solves the problem that the negative liquid crystal response speed is slow to some extent.

For the present disclosure, the width and spacing of the strip electrodes in the pixel electrode or the common electrode may be determined according to the values achievable by the actual process, as long as they belong to the structure, which are within the scope of the present disclosure.

An embodiment of the present disclosure provides a display device including the liquid crystal display panel of any of the above aspects, the display device including a liquid crystal display panel, a liquid crystal display, a liquid crystal television, and the like.

In summary, the liquid crystal display panel of the present disclosure is filled with negative liquid crystal molecules, and the negative liquid crystal molecules are deflected in the water surface by the transverse electric field to change the transmittance of the light, and the deflection of the liquid crystal molecules. The electric field of the vertical component does not contribute to the deflection of the liquid crystal molecules in the horizontal plane only by the horizontal component of the electric field. The off-state response time τ _off and the on-state response time τ _{on of the} liquid crystal display panel are not affected by the electric field of the vertical component between the first substrate and the second substrate. Moreover, the extending direction of the strip electrodes in the first slit electrode of the present disclosure and the extending direction of the strip electrodes in the second slit electrode have a first set angle α, which are not arranged in parallel, so The overlap between the two is small, which improves the light transmittance of the liquid crystal display panel and improves the display quality of the image.

The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

The present application claims priority to Chinese Patent Application No. 2014 1024 054 2.6 filed on May 30, 2014, the entire disclosure of which is hereby incorporated by reference.

Claims

A liquid crystal display panel comprising: a first substrate and a second substrate disposed opposite to each other; and a negative liquid crystal layer between the first substrate and the second substrate;

The liquid crystal display panel further includes: a first common electrode and a first pixel electrode which are insulated from each other on a side of the first substrate adjacent to the negative liquid crystal layer;

a second common electrode and a second pixel electrode on the second substrate that are insulated from each other on a side of the negative liquid crystal layer;

At least one of the first common electrode and the first pixel electrode is a first slit electrode including a plurality of strip electrodes;

At least one of the second common electrode and the second pixel electrode is a second slit electrode including a plurality of strip electrodes;

The extending direction of the strip electrodes in the first slit electrode and the extending direction of the strip electrodes in the second slit electrode have a first set angle α.
The liquid crystal display panel according to claim 1, wherein the first set angle α is 70 to 90°.
The liquid crystal display panel according to claim 1 or 2, further comprising:

a first alignment layer on the first substrate in contact with the negative liquid crystal layer;

a second alignment layer on the second substrate in contact with the negative liquid crystal layer;

The angle β between the rubbing direction of the first alignment layer and the strip electrode of the first slit electrode or the strip electrode of the second strip electrode satisfies the following formula:

β = (α/2) ± 5 °.
The liquid crystal display panel according to claim 1 or 2, wherein the first set angle is 90°, a rubbing direction of the first alignment layer and a strip electrode in the first slit electrode The angle is 45°.
The liquid crystal display panel according to any one of claims 1 to 4, wherein the first alignment layer and the second alignment layer have the same rubbing direction.
The liquid crystal display panel according to any one of claims 1 to 5, further comprising:

a first polarizer located on a side of the first substrate away from the negative liquid crystal layer;

a second polarizer located on a side of the second substrate away from the negative liquid crystal layer;

The transmission axis of the first polarizer is the same as the rubbing direction of the first alignment layer; the transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizer.
The liquid crystal display panel according to any one of claims 1 to 6, wherein the first common electrode and the first pixel electrode are respectively the first slit electrode including a plurality of strip electrodes, and Set in the same layer;

The second common electrode and the second pixel electrode are respectively the second slit electrode including a plurality of strip electrodes, and the two are disposed in the same layer;

The strip electrodes in the first common electrode and the first pixel electrode extend in the same direction and are arranged at intervals; the strip electrodes in the second common electrode and the second pixel electrode extend in the same direction and are arranged at intervals.
A liquid crystal display panel according to any one of claims 1 to 6, wherein

The first common electrode is a planar electrode, and the first pixel electrode is the first slit electrode including a plurality of strip electrodes, and the two are insulated by a first insulating layer; the second The common electrode is a planar electrode, and the second pixel electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer;

or

The first pixel electrode is a planar electrode, and the first common electrode is the first slit electrode including a plurality of strip electrodes, and the two are insulated by a first insulating layer; the second The pixel electrode is a planar electrode, and the second common electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer.
The liquid crystal display panel according to any one of claims 1 to 6, wherein the first common electrode and the first pixel electrode are respectively the first slit electrode including a plurality of strip electrodes, and The same is disposed in the same layer; the strip electrodes in the first common electrode and the first pixel electrode extend in the same direction and are arranged at intervals;

The second common electrode is a planar electrode, and the second pixel electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer; or the The two pixel electrode is a planar electrode, and the second common electrode is the second slit electrode including a plurality of strip electrodes, and the two are insulated by a second insulating layer.
A display device comprising the liquid crystal display panel of any one of claims 1 to 9.