Liquid crystal panel

A liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer. A first electrode layer and a first alignment film are disposed on a side of the first substrate facing the second substrate. A second electrode layer and a second alignment film are disposed on a side of the second substrate facing the first substrate. At least one auxiliary electrode layer is disposed between the first alignment film and the second alignment film, and the auxiliary electrode layer is disposed in the liquid crystal layer close to the first alignment film and/or the second alignment film.

The present application claims the priority of Chinese patent application No. 201911271051.7 filed on Dec. 12, 2019 and titled “LIQUID CRYSTAL PANEL”, which is herein incorporated by reference in its entirety.

BACKGROUND OF INVENTION

Field of Invention

The present invention relates to the field of display technology, more particularly, to a liquid crystal panel.

Description of Prior Art

Liquid crystal display (LCD) panels are widely used flat-panel displays. The display panels mainly realize the screen display by modulating the intensity of the light field of the backlight source through a liquid crystal switch. The polymer stabilized vertical alignment technology in LCD panels can make liquid crystal display panels have advantages, such as fast response time and high transmittance. The principle is to apply an alignment film (PT) on a pixel electrode and anchor the liquid crystal molecules through the alignment film, so the liquid crystal molecules are aligned vertically, and reactive mesogen (RM) in the liquid crystal forms a polymer protrusion on the surface of the alignment film by ultraviolet (UV) light radiation. Therefore, the liquid crystal molecules have a pretilt angle.

However, because anchoring effect of PT side chains, in, a degree of tilt of a part of the liquid crystal molecules is affected a power-on state, resulting in a certain loss of the transmittance of the panels.

Therefore, it has defects in the prior art and urgently needs to be improved.

SUMMARY OF INVENTION

A liquid crystal panel is provided, it solves the problems that the liquid crystal panels in the prior art affect the degree of tilt of the liquid crystal molecules due to the anchoring effect of the alignment film side chains, and then affects the transmittance of the liquid crystal panels.

In order to solve the above problems, the technical solutions are described as follows:

A liquid crystal panel comprises:

a first substrate and a second substrate opposite to each other;

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

a first electrode layer disposed on a side surface of the first substrate facing the second substrate;

a second electrode layer disposed on a side surface of the second substrate facing the first substrate;

a first alignment film disposed on a side surface of the first electrode layer facing the second substrate; and

a second alignment film disposed on a side surface of the second electrode layer facing the first substrate. At least one auxiliary electrode layer is disposed between the first alignment film and the second alignment film, and the auxiliary electrode layer is disposed in the liquid crystal layer close to the first alignment film and/or the second alignment film, and the auxiliary electrode layer is configured to form an electric field with the first electrode layer and/or the second electrode layer.

In one embodiment, the auxiliary electrode layer is disposed close to the first electrode layer, and electric field intensity formed between the auxiliary electrode layer and the first electrode layer is greater than electric field intensity formed between the auxiliary electrode layer and the second electrode layer.

In one embodiment, the auxiliary electrode layer is disposed close to the second electrode layer, and electric field intensity formed between the auxiliary electrode layer and the second electrode layer is greater than electric field intensity formed between the auxiliary electrode layer and the first electrode layer.

In one embodiment, liquid crystal molecules are disposed between the auxiliary electrode layer and the first alignment film, and between the auxiliary electrode layer and the second alignment film.

In one embodiment, liquid crystal molecules are disposed between the auxiliary electrode layer and the first alignment film, and between the auxiliary electrode layer and the second alignment film.

In one embodiment, the liquid crystal panel comprises two auxiliary electrode layers, a first auxiliary electrode layer is disposed close to the first electrode layer, and a second auxiliary electrode layer is disposed close to the second electrode layer; and wherein electric field intensity formed between the first auxiliary electrode layer and the first electrode layer is equal to electric field intensity formed between the second auxiliary electrode layer and the second electrode layer, which are greater than electric field intensity formed between the first auxiliary electrode layer and the second auxiliary electrode layer.

In one embodiment, liquid crystal molecules are disposed between the first auxiliary electrode layer and the first alignment film, between the second auxiliary electrode layer and the second alignment film, and between the first auxiliary electrode layer and the second auxiliary electrode layer.

In one embodiment, the liquid crystal panel comprises a plurality of sub-pixel units, and the auxiliary electrode layer corresponds to a distribution of a sub-pixel unit array.

In one embodiment, a spacer is disposed on the first substrate and/or the second substrate, the spacer is configured to support the auxiliary electrode layer, and the spacer is correspondingly disposed between two adjacent sub-pixels.

In one embodiment, the auxiliary electrode layer is a hollow or fishbone structure.

A liquid crystal panel comprises:

a first substrate and a second substrate opposite to each other;

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

a first electrode layer disposed on a side surface of the first substrate facing the second substrate;

a second electrode layer disposed on a side surface of the second substrate facing the first substrate;

a first alignment film disposed on a side surface of the first electrode layer facing the second substrate; and

a second alignment film disposed on a side surface of the second electrode layer facing the first substrate. At least one auxiliary electrode layer is disposed between the first alignment film and the second alignment film, and the auxiliary electrode layer is disposed in the liquid crystal layer close to the first alignment film and/or the second alignment film, the auxiliary electrode layer is configured to form an electric field with the first electrode layer and/or the second electrode layer, and the first electrode layer, the second electrode layer, and the auxiliary electrode layer are disposed in parallel with each other, and are all transparent electrodes.

In one embodiment, the auxiliary electrode layer is disposed close to the first electrode layer, and electric field intensity formed between the auxiliary electrode layer and the first electrode layer is greater than electric field intensity formed between the auxiliary electrode layer and the second electrode layer.

In one embodiment, the auxiliary electrode layer is disposed close to the second electrode layer, and electric field intensity formed between the auxiliary electrode layer and the second electrode layer is greater than electric field intensity formed between the auxiliary electrode layer and the first electrode layer.

In one embodiment, liquid crystal molecules are disposed between the auxiliary electrode layer and the first alignment film, and between the auxiliary electrode layer and the second alignment film.

In one embodiment, liquid crystal molecules are disposed between the auxiliary electrode layer and the first alignment film, and between the auxiliary electrode layer and the second alignment film.

In one embodiment, the liquid crystal panel comprises two auxiliary electrode layers, a first auxiliary electrode layer is disposed close to the first electrode layer, and a second auxiliary electrode layer is disposed close to the second electrode layer; and wherein electric field intensity formed between the first auxiliary electrode layer and the first electrode layer is equal to electric field intensity formed between the second auxiliary electrode layer and the second electrode layer, which are greater than electric field intensity formed between the first auxiliary electrode layer and the second auxiliary electrode layer.

In one embodiment, liquid crystal molecules are disposed between the first auxiliary electrode layer and the first alignment film, between the second auxiliary electrode layer and the second alignment film, and between the first auxiliary electrode layer and the second auxiliary electrode layer.

In one embodiment, the liquid crystal panel comprises a plurality of sub-pixel units, and the auxiliary electrode layer corresponds to a distribution of a sub-pixel unit array.

In one embodiment, a spacer is disposed on the first substrate and/or the second substrate, the spacer is configured to support the auxiliary electrode layer, and the spacer is correspondingly disposed between two adjacent sub-pixels.

In one embodiment, the auxiliary electrode layer is a hollow or fishbone structure.

The beneficial effect of the present invention is that a liquid crystal panel provided is provided with at least one auxiliary electrode layer between the first alignment film and the second alignment film, and the auxiliary electrode layer is disposed in the liquid crystal layer close to the first alignment film and/or the second alignment film. The auxiliary electrode layer is configured to form an electric field with the first electrode layer and/or the second electrode layer. The electric field intensity between the auxiliary electrode layer and the first electrode layer and/or the second electrode layer is increased, thereby increasing the degree of tilt of liquid crystal molecules close to a side of the alignment film. Therefore, transmittance of the liquid crystal display panel is improved.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Directional terms mentioned in this application, such as “up,” “down,” “forward,” “backward,” “left,” “right,” “inside,” “outside,” “side,” etc., are merely indicated the direction of the drawings. Therefore, the directional terms are used for illustrating and understanding of the application rather than limiting thereof.

FIG. 1is a schematic view of liquid crystal molecules deflection of a liquid crystal panel of the prior art when current is applied to a pixel electrode.

The liquid crystal panel is usually coated with an alignment film (PI)103on a surface of an upper substrate101and a surface of a lower substrate102, which are aligned with each other, and reactive mesogen (RM) in the liquid crystal layer104forms a polymer protrusion103′ on a surface of the alignment film103by ultraviolet (UV) light radiation, that is, a PI side chain is formed, which can anchor liquid crystal molecules, and thus the liquid crystal molecules are aligned vertically. Therefore, the liquid crystal molecules have a pretilt angle.

When a current is applied to pixel electrodes on the upper substrate101and the lower substrate102, the liquid crystal molecules are deflected under a vertical electric field. Due to the anchoring effect of the PI side chain, the liquid crystal molecules close to the alignment film103have a lower degree of tilt than the liquid crystal molecules of the effective layer104′ in the middle of the panel. The liquid crystal molecules are not completely tilted, which results in a certain loss of transmittance.

The following embodiments of the present invention solve the technical problem of the degree of tilt of liquid crystal molecules in the liquid crystal panels is affected due to the anchoring effect of the alignment film side chains, which affects the transmittance of the liquid crystal panels.

Referring toFIG. 2toFIG. 7, they are schematic views of the liquid crystal panels according to the embodiments of the present invention. The liquid crystal panel comprises a first substrate201and a second substrate202opposite to each other. A first electrode layer2010is disposed on a side surface of the first substrate201facing the second substrate202. A second electrode layer2020is disposed on a side surface of the second substrate202facing the first substrate201. A first alignment film2011is disposed on a side surface of the first electrode layer2010facing the second substrate202. A second alignment film2021is disposed on a side surface of the second electrode layer2020facing the first substrate201. A liquid crystal layer203is disposed between the first alignment film2011and the second alignment film2021.

At least one auxiliary electrode layer204is disposed between the first alignment film2011and the second alignment film2021, and the auxiliary electrode layer204is disposed in the liquid crystal layer203close to the first alignment film2011and/or the second alignment film2021, and the auxiliary electrode layer204is configured to form an electric field with the first electrode layer2010and/or the second electrode layer2020.

In the embodiment of the present invention, the auxiliary electrode layer204is disposed in the liquid crystal layer203. In order to ensure that the position of the auxiliary electrode layer204is fixed and does not shift, a spacer205is disposed on the first substrate201and/or the second substrate202. The spacer205is configured to support the auxiliary electrode layer204. The first substrate201may be a color filter substrate, and the second substrate202may be an array substrate.

The liquid crystal panel comprises a plurality of sub-pixel units (not shown). Both of the first electrode layer2010and the second electrode layer2020comprise a plurality of electrode units corresponding to the sub-pixel units. The auxiliary electrode layer204corresponds to a distribution of a sub-pixel unit array.

In the embodiments of the present invention, in order not to affect the transmittance of the sub-pixel unit, the spacer205may be correspondingly disposed at a position between two adjacent sub-pixel units, which is not limited herein.

In the embodiments of the present invention, the first electrode layer2010, the second electrode layer2030, and the auxiliary electrode layer204are disposed in parallel with each other, and are all transparent electrodes. The transparent electrode material comprises at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), and zinc aluminum oxide (AZO).

In the embodiments of the present invention, the auxiliary electrode layer204is a hollow or fishbone structure, which is not limited herein.

In the embodiments of the present invention, the electric field intensity between the auxiliary electrode layer204and the first electrode layer2010and/or the second electrode layer2020is increased, thereby increasing the degree of tilt of liquid crystal molecules close to a side of the alignment film. Therefore, transmittance of the liquid crystal display (LCD) panel is improved.

The liquid crystal panel is described in detail in combination with the following specific embodiments.

In first embodiment, referring toFIG. 2, an auxiliary electrode layer204is disposed between the first alignment film2011and the second alignment film2021, and the auxiliary electrode layer204is disposed in the liquid crystal layer203close to the first electrode layer2010. The liquid crystal layer203is divided by the auxiliary electrode layer204into a first liquid crystal sub-layer2031disposed between the auxiliary electrode layer204and the first alignment film2011and a second liquid crystal sub-layer2032disposed between the auxiliary electrode layer204and the second alignment film2021. That is, liquid crystal molecules are disposed between the Auxiliary electrode layer204and the first alignment film2011, and between the auxiliary electrode layer204and the second alignment film2021. When no voltage is applied to the first electrode layer2010and the second electrode layer2020, the liquid crystal molecules are arranged vertically by polymer protrusions S on the surfaces of the first alignment film2011and the second alignment film2021and have a pretilt angle, as shown inFIG. 2.

In the embodiment, a distance between the auxiliary electrode layer204and the first alignment film2011is about 0.2 μm, but it is not limited herein.

Referring toFIG. 3, when a voltage is applied to the first electrode layer2010and the second electrode layer2020, the auxiliary electrode layer204, the first electrode layer2010, and the second electrode layer2020are configured to form an electric field. In addition, electric field intensity formed between the auxiliary electrode layer204and the first electrode layer2010is greater than electric field intensity formed between the auxiliary electrode layer204and the second electrode layer2020.

Because the electric field intensity in the first liquid crystal sub-layer2031is increased, the degree of tilt of the liquid crystal molecules in the first liquid crystal layer2031becomes greater, and the more backlight is allowed to pass through the liquid crystal layer203, Thus, the transmittance of the liquid crystal display panel is improved.

Preferably, the degree of tilt of the liquid crystal molecules in the first liquid crystal sub-layer2031is consistent with the degree of tilt the effective liquid crystal molecules in the middle position of the liquid crystal layer203. Specifically, the electric field intensity can be controlled by adjusting the distance between the auxiliary electrode layer204and the first electrode layer2010, so as to regulate the degree of tilt the liquid crystal molecules in the first liquid crystal sub-layer2031. Alternatively, the hollow area of the auxiliary electrode layer204is adjusted to control the electric field intensity between the auxiliary electrode layer204and the first electrode layer2010, so as to adjust the degree of tilt of the liquid crystal molecules in the first liquid crystal sub-layer2031.

In this embodiment, a spacer205is disposed on the first substrate201and the second substrate202, and material and shape of the spacer205are not limited herein

In second embodiment, referring toFIG. 4, the liquid crystal panel is the same and similar to the liquid crystal panel of the first embodiment, and the difference is that the auxiliary electrode layer204is disposed one a side of the liquid crystal layer203close to the second electrode layer2020. Side position setting. When no voltage is applied to the first electrode layer2010and the second electrode layer2020, the liquid crystal molecules are arranged vertically by polymer protrusions S on the surfaces of the first alignment film2011and the second alignment film2021and have a pretilt angle, as shown inFIG. 4.

In this embodiment, a distance between the auxiliary electrode layer204and the second alignment film2021is about 0.2 μm, but it is not limited herein.

Referring toFIG. 5, when a voltage is applied to the first electrode layer2010and the second electrode layer2020, the auxiliary electrode layer204, the first electrode layer2010, and the second electrode layer2020are configured to form an electric field. In addition, electric field intensity formed between the auxiliary electrode layer204and the second electrode layer2020is greater than electric field intensity formed between the auxiliary electrode layer204and the first electrode layer2010.

Because the electric field intensity in the second liquid crystal sub-layer2032is increased, the degree of tilt of the liquid crystal molecules in the second liquid crystal layer2032becomes greater, and the more backlight is allowed to pass through the liquid crystal layer203, Thus, the transmittance of the liquid crystal display panel is improved.

Preferably, the degree of tilt of the liquid crystal molecules in the second liquid crystal sub-layer2032is consistent with the degree of tilt of the effective liquid crystal molecules in the middle position of the liquid crystal layer203.

In third embodiment, referring toFIG. 6, the liquid crystal panel is the same and similar to the liquid crystal panel of the first embodiment and the second embodiment, and the difference is that

The liquid crystal panel comprises two the auxiliary electrode layer. A first auxiliary electrode layer2041is disposed on a side of the liquid crystal layer203close to the first electrode layer2010. A second auxiliary electrode layer2042is disposed on a side of the liquid crystal layer203close to the second electrode layer2020.

The liquid crystal layer203comprises a first liquid crystal sub-layer2031, second liquid crystal sub-layer2032, and a third liquid crystal sub-layer2033. The first liquid crystal sub-layer2031is disposed between the first auxiliary electrode layer2041and the first alignment film2011. The second liquid crystal sub-layer2032is disposed between the second auxiliary electrode layer2042and the second alignment film2021. The third liquid crystal sub-layer2033is disposed between the first auxiliary electrode layer2041and the second auxiliary electrode layer2042.

When no voltage is applied to the first electrode layer2010and the second electrode layer2020, the liquid crystal molecules are arranged vertically by polymer protrusions S on the surfaces of the first alignment film2011and the second alignment film2021and have a pretilt angle, as shown inFIG. 6.

Referring toFIG. 7, when a voltage is applied to the first electrode layer2010and the second electrode layer2020, the first auxiliary electrode layer2041and the first electrode layer2010are configured to form a first electric field, the second auxiliary electrode layer2042and the second electrode layer2020are configured to form a second electric field, and the first auxiliary electrode layer2041and the second auxiliary electrode layer2042are configured to form a third electric field. In addition, the first electric field intensity is equal to the second electric field intensity, and both are greater than the third electric field intensity.

Compared with the first embodiment and the second embodiment, the electric field intensity in the first liquid crystal sub-layer2031and second liquid crystal sub-layer2032is increased in the third embodiment, the degree of tilt of the liquid crystal molecules in the first liquid crystal sub-layer2031and the second liquid crystal layer2032becomes greater. That is, the influence of the anchoring effect of the alignment film side chains on the degree of tilt of the liquid crystal molecules is greatly eliminated, and the amount of backlight passing through the liquid crystal layer203is maximized, thereby further improving the transmittance of the liquid crystal panel.

Preferably, the degree of tilt of the liquid crystal molecules in the first liquid crystal sub-layer2031and the second liquid crystal sub-layer2032is consistent with the degree of tilt of the effective liquid crystal molecules in the third liquid crystal sub-layer2033in the middle position of the liquid crystal layer203.

In the embodiments of the present invention, an auxiliary electrode layer is disposed between the first alignment film and the second alignment film, and the auxiliary electrode layer is disposed in the liquid crystal layer close to the first alignment film and/or the second alignment film. The auxiliary electrode layer is configured to form an electric field with the first electrode layer and/or the second electrode layer. The present application increases the electric field strength between the auxiliary electrode layer and the first electrode layer and/or the second electrode layer, thereby increasing the degree of pouring of liquid crystal molecules near the alignment film side, thereby improving the transmittance of the liquid crystal panel. In the embodiments of the present invention, the electric field intensity between the auxiliary electrode layer and the first electrode layer and/or the second electrode layer is increased, thereby increasing the degree of tilt of liquid crystal molecules close to a side of the alignment film. Therefore, transmittance of the liquid crystal display panel is improved.

In the above, the present application has been described in the above preferred embodiments, but the preferred embodiments are not intended to limit the scope of the invention, and a person skilled in the art may make various modifications without departing from the spirit and scope of the application. The scope of the present application is determined by claims.