CN116774479A - Display panel and display device - Google Patents

Abstract

The application relates to a display device and a display panel, wherein the display panel comprises a first liquid crystal box, the first liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer positioned between the color film substrate and the array substrate, a first polaroid is arranged on one side of the color film substrate, which is far away from the first liquid crystal layer, and a second polaroid is arranged on one side of the array substrate, which is far away from the first liquid crystal layer; the display panel further comprises a dimming layer, the dimming layer is located on one side, away from the array substrate, of the first liquid crystal layer, and the dimming layer is used for reducing light transmitted to the first liquid crystal layer when the display panel is in a screen-off state, so that the intensity of light reflected by the array substrate is reduced, and the brightness of the display panel in the screen-off state is reduced.

Description

Display panel and display device

Technical Field

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

Background

At present, the liquid crystal display has the advantages of light weight, low driving voltage, low power consumption and the like, and is a display product with wide application. With the increasing demands of people on display products, not only are higher demands put on the performance of the display in a display state, but also the performance of the display in a screen-off state. When the display is in the screen-off state, light irradiates the inside of the display to be reflected, and the display has overlarge brightness in the screen-off state due to stronger reflection in the display, so that the requirements of users cannot be met.

Disclosure of Invention

The embodiment of the application provides a display device and a display panel, wherein the display panel comprises a first liquid crystal box, the first liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer positioned between the color film substrate and the array substrate, a first polaroid is arranged on one side, far away from the first liquid crystal layer, of the color film substrate, and a second polaroid is arranged on one side, far away from the first liquid crystal layer, of the array substrate;

the display panel further comprises a dimming layer, the dimming layer is located on one side, away from the array substrate, of the first liquid crystal layer, and the dimming layer is used for reducing light transmitted to the first liquid crystal layer when the display panel is in a screen-off state, so that the intensity of light reflected by the array substrate is reduced, and the brightness of the display panel in the screen-off state is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to the present application;

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

FIG. 3 is a schematic diagram of a display panel according to another embodiment of the present application;

FIG. 4 is a schematic structural diagram of a display panel according to another embodiment of the present application;

FIG. 5 is a schematic view of a display panel according to another embodiment of the present application;

FIG. 6 is a schematic structural diagram of a display panel according to another embodiment of the present application;

FIG. 7 is a schematic diagram of a display panel according to another embodiment of the present application;

FIG. 8 is a schematic diagram of a display panel according to another embodiment of the present application;

FIG. 9 is a schematic diagram of a display panel according to another embodiment of the present application;

fig. 10 is a schematic structural diagram of a display panel according to another embodiment of the application.

Reference numerals:

1-a first polarizer;

2-a coating layer;

3-a dimming layer;

31-electrochromic layer;

311-first part;

312-a second portion;

313-third part;

32-an electrorefractive index change layer;

321-fourth portion;

322-fifth section;

323-sixth section;

33-optical cement;

4-color film substrate;

41-a glass substrate;

42-color film layer;

421-red resistance;

422-green resistance;

423-blue resistance;

43-black matrix;

5-a first liquid crystal layer;

6-an array substrate;

7-a second polarizer;

8-a liquid crystal cell;

81-a first transparent substrate;

82-a second transparent substrate;

83-a second liquid crystal layer;

91-a third polarizer;

92-fourth polarizer.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The embodiment of the application provides a display device, which comprises a display panel, a backlight module, a control and drive circuit and other components, wherein the backlight module is positioned below the display panel and used as a light source of the display panel. Fig. 1 is a schematic structural diagram of a display panel according to the present application. The display panel comprises a first liquid crystal box, wherein the first liquid crystal box comprises a color film substrate 4, an array substrate 6 and a first liquid crystal layer 5 which are oppositely arranged, the first liquid crystal layer 5 is arranged between the color film substrate 4, a first polaroid 1 is arranged on one side, far away from the first liquid crystal layer 5, of the color film substrate 4, and a second polaroid 7 is arranged on one side, far away from the first liquid crystal layer 5, of the array substrate 6.

When the display panel is in a screen-off state (non-display state), i.e. the backlight module below the display panel is not on and each sub-pixel is in an off state, in an ideal state, the light irradiated to the display panel cannot pass through the first liquid crystal layer 5, i.e. no light irradiates to the array substrate 6. However, as shown in fig. 1, in actual practice, the first liquid crystal layer 5 has a problem of light leakage, that is, a part of light irradiated to the display panel is transmitted to the array substrate 6 through the first liquid crystal layer 5 and reflected out of the display panel through the array substrate 6. When the light intensity leaked to the array substrate 6 is larger, the light intensity reflected by the array substrate 6 is also larger, so that the brightness of the display panel in the screen-off state is larger, and the user experience of the display panel in the screen-off state is affected. In order to solve the technical problem, as shown in fig. 2, fig. 2 is a schematic structural diagram of a display panel provided by the present application in a specific embodiment, where the display panel further includes a dimming layer 3, the dimming layer 3 is located on a side of the first liquid crystal layer 5 facing away from the array substrate 6, and the dimming layer 3 is used to reduce light transmitted to the first liquid crystal layer 5 when the display panel is in a screen-off state, so as to reduce light leaking to the array substrate 6 through the first liquid crystal layer 5, further reduce intensity of light reflected by the array substrate 6, and reduce brightness of the display panel in the screen-off state.

As shown in fig. 3, fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present application, where the display panel may further include a coating layer 2 disposed on a side of the first liquid crystal cell facing the first polarizer 1, and the coating layer 2 is used to reduce the risk of electrostatic damage to the display panel. In the embodiment shown in fig. 3, the dimming layer 3 is disposed on a side of the coating layer 2 facing the color film substrate 4. In other embodiments, the dimming layer 3 may also be disposed on a side of the coating layer 2 away from the color film substrate 4.

In a specific embodiment, the dimming layer 3 comprises an electrochromic layer configured to be transparent when the display panel is in a display state, the transparent electrochromic layer not affecting the normal display of the display panel, wherein the display panel is in the display state means: the backlight module positioned below the display panel is lightened, and the sub-pixels of the first display area of the display panel are started, so that the light of the backlight module can be transmitted out of the display panel, and display is realized. Meanwhile, the electrochromic layer is also configured to be opaque when the display panel is in the screen-off state and capable of reflecting light of a preset color, so that the electrochromic layer can block light from transmitting to the first liquid crystal layer 5 when the display panel is in the screen-off state, so that almost no light is transmitted to the array substrate 6 when the display panel is in the screen-off state, so that the array substrate 6 can not reflect light outwards, and the electrochromic layer can reflect light of the preset color, so that the display panel can be of the preset color when in the screen-off state, and the preset color can be of a color desired by a user, so that the hue of the display panel in the screen-off state can be accepted by the user.

For example, when the electrochromic layer is configured to be transparent when the display panel is in a display state, and black when in a rest state, the display panel is black when in a rest state, thereby improving the integral black effect of the display panel when in a rest state. When the electrochromic layer is configured to be transparent when the display panel is in a display state, and blue when in a rest state, the display panel is blue when in a rest state.

Specifically, the electrochromic layer 31 may have a structure that is transparent when energized and displays a preset color when de-energized, or the electrochromic layer 31 may also have a structure that is transparent when a forward current is energized and displays a preset color when a reverse current is energized. For example, the electrochromic layer 31 may be made of tungsten trioxide or the like.

In one embodiment, the color filter substrate 4 includes a display area including a plurality of pixel openings, as shown in fig. 4 and fig. 5, and fig. 4 and fig. 5 are schematic structural diagrams of the display panel according to another two embodiments of the present application. The color film substrate 4 comprises a glass substrate 41, a black matrix 43 and a color film layer 42, the black matrix 43 is arranged on one side of the glass substrate 41, the black matrix 43 comprises a hollowed-out portion, the color film layer 42 is at least partially positioned in the hollowed-out portion, and the pixel opening corresponds to the hollowed-out portion. The dimming layer 3 in this embodiment may be an electrochromic layer 31, and the electrochromic layer 31 covers at least each pixel opening, so that the light transmitted to each pixel opening is reduced by the electrochromic layer 31, and the brightness of each sub-pixel display is reduced. Meanwhile, the electrochromic layer 31 does not cover the black matrix 43. Since the black matrix 43 is opaque, the electrochromic layer 31 does not need to cover the black matrix 43, thereby reducing the amount of electrochromic layer 31 and reducing the cost.

Specifically, the plurality of pixel openings in the display area of the color film substrate 4 include a red sub-pixel opening, a green sub-pixel opening and a blue sub-pixel opening, and in the embodiment shown in fig. 4 and 5, the color film layer 42 of the color film substrate 4 includes a red resistor 421, a green resistor 422 and a blue resistor 423, the red resistor 421 at least covers the red sub-pixel opening, the green resistor 422 at least covers the green sub-pixel opening, and the blue resistor 423 at least covers the blue sub-pixel opening. When the display panel is in a display state, the red sub-pixel emits red light, the green sub-pixel emits green light, and the blue sub-pixel emits blue light, and when the brightness of the red light, the green light and the blue light are different, the light with different colors and brightness can be obtained, so that the display is realized.

In some embodiments, in the spectrum reflected by the array substrate 6 in the screen-off state, the red light is stronger, so that the display panel turns red in the screen-off state, which cannot meet the demands of some users. In order to solve the technical problem, the embodiment of the application can reduce the intensity of the red light transmitted to the first liquid crystal layer 5 through the electrochromic layer 31, thereby reducing the intensity of the red light reflected by the array substrate 6 of the display panel and improving the reflection hue of the display panel in the off-screen state.

In the embodiment shown in fig. 4 and 5, the electrochromic layer 31 may include a first portion 311, a second portion 312, and a third portion 313, the first portion 311 covering the red sub-pixel opening, the second portion 312 covering the green sub-pixel opening, and the third portion 313 covering the blue sub-pixel opening. When the display panel is in a display state, the first portion 311, the second portion 312 and the third portion 313 are transparent, so that the light of the backlight module can be transmitted out of the display panel to realize display.

When the display panel is in the off-screen state, the color of the first portion 311 of the electrochromic layer 31 changes to a first color (the first color may be other than red), and when ambient light is irradiated to the first portion 311, the first portion 311 can block a portion of red light, i.e., can reduce the transmittance of red light, thereby reducing the intensity of light transmitted to the red sub-pixel through the first portion 311. Similarly, when the display panel is in the off-screen state, the color of the second portion 312 of the electrochromic layer 31 changes to a second color (the second color may be other than green), and when ambient light is irradiated to the second portion 312, the second portion 312 can block a portion of green light, i.e., can reduce the transmittance of green light, thereby reducing the intensity of light transmitted to the green sub-pixel via the second portion 312, and the third portion 313 can reduce the intensity of light transmitted to the blue sub-pixel via the third portion 311. When the display panel is in the off-screen state, the color of the third portion 313 of the electrochromic layer 31 is changed to a third color (the third color may be other than blue), and when the third portion 313 is irradiated by ambient light, the third portion 313 can block a portion of the blue light, i.e., can reduce the transmittance of the blue light, thereby reducing the intensity of the light transmitted to the blue sub-pixel through the third portion 313.

Meanwhile, the electrochromic layer 31 is further configured such that when the display panel is in the off-screen state, the transmittance of the first portion 311 for red light is smaller than the transmittance of the second portion 312 for green light, the transmittance of the second portion 312 for green light is smaller than the transmittance of the third portion 313 for blue light, that is, the intensity of red light transmitted to the first liquid crystal layer 5 through the first portion 311 is smaller than the intensity of green light transmitted to the first liquid crystal layer 5 through the second portion 312, and the intensity of green light transmitted to the first liquid crystal layer 5 through the second portion 312 is smaller than the intensity of blue light transmitted to the first liquid crystal layer 5 through the third portion 313, so that the intensity of red light in the spectrum reflected by the array substrate 6 can be reduced, and the phenomenon of redness of the display panel in the off-screen state is improved, so as to satisfy the demands of users.

It should be noted that, in this embodiment, the electrochromic layer 31 is configured such that when the display panel is in the off-screen state, the transmittance of the first portion 311 is smaller than the transmittance of the second portion 312, and the transmittance of the second portion 312 is smaller than the transmittance of the third portion 313, so as to make the reflection color of the display panel blue when in the off-screen state, that is, this embodiment can satisfy the user who prefers blue, and when the user prefers other colors, this can be achieved by changing the transmittance of the first portion 311, the second portion 312, and the third portion 313 of the electrochromic layer 31.

In the above embodiments, as shown in fig. 3 and fig. 4, the display panel may further include a coating layer 2 disposed on a side of the color film substrate 4 facing away from the first liquid crystal layer 5, where the coating layer 2 is used for preventing static electricity from being damaged, and the material of the coating layer 2 may be polyethylene dioxythiophene (PEDOT), where the PEDOT is near transparent, and has less influence on the reflective color phase of the display panel in the screen-off state. Among them, the electrochromic layer 31 may be provided on at least one side surface of the plating layer 2 in the thickness direction of the display panel.

In the embodiment shown in fig. 3, the light modulation layer 3 of the display panel is an electrochromic layer, and the light modulation layer 3 is disposed on one side of the coating layer 2 facing the color film substrate 4, and in this embodiment, the light modulation layer 3 is a film layer with the same thickness throughout, i.e. in this embodiment, the light modulation layer 3 covers each pixel opening area and the black matrix.

In the embodiment shown in fig. 4, the dimming layer of the display panel is an electrochromic layer 31, the electrochromic layer 31 is disposed on one side of the coating layer 2 facing the color film substrate 4, and the electrochromic layer 31 only covers the pixel opening areas and does not cover the black matrix 43, i.e. the electrochromic layer 31 includes the first portion 311, the second portion 312 and the third portion 313, and gaps are formed between the first portion 311, the second portion 312 and the third portion 313, and correspond to the black matrix 43, and an optical adhesive 33 may be disposed in the gaps, wherein the optical adhesive 33 may function as a flat layer and may be used to connect the coating layer 2 adjacent to the electrochromic layer 31 and the color film substrate 4.

In other embodiments, as shown in fig. 5, the electrochromic layer 31 is located between the glass substrate 41 and the color film layer 42, i.e. within the color film substrate 4. Specifically, the electrochromic layer 31 may be located on the same layer as the black matrix 43, and the electrochromic layer 31 covers only the pixel opening areas and does not cover the black matrix 43, i.e., the electrochromic layer 31 includes the first portion 311, the second portion 312, and the third portion 313 described above, and the black matrix 43 is located between the first portion 311 and the second portion 312, and between the second portion 312 and the third portion 313, i.e., the first portion 311 and the second portion 312 are separated by the black matrix 43, and the second portion 312 and the third portion 313 are separated by the black matrix 43. The electrochromic layer 31 is arranged in such a manner that the thickness of the display panel can be reduced in this embodiment.

In the embodiment shown in fig. 5, the display panel may not include the coating layer 2, and at this time, conductive particles may be disposed in the first polarizer 2, thereby preventing electrostatic shock.

In other embodiments, the dimming layer 3 in the embodiments of the present application may be further configured to have a refractive index N1 when the display panel is in the off-screen state, a refractive index N2 when the display panel is in the display state, and refractive indexes N of adjacent layers to the dimming layer 3 satisfy 0.15++n1-n+. 0.45,0 +.n2-n+.0.1, |n1-n| may be 0.15, 0.2, 0.3, 0.35, 0.45, etc., i.e., a difference between N1 and N is large, and|n2-n| may be 0, 0.05, 0.1, etc., i.e., a difference between N2 and N is small, and both may be equal.

When the display panel is in a display state, the refractive index N2 of the dimming layer 3 is equal to or close to the refractive index N of the adjacent layer of the dimming layer 3, so that the light reflection of the adjacent layer of the dimming layer 3 is weaker, the light transmission is stronger, the risk of too low light intensity of the first liquid crystal box transmitted to the lower side of the dimming layer 3 caused by the arrangement of the dimming layer 3 is reduced, and the display panel has good display effect when the dimming layer 3 is arranged. When the display panel is in a screen-off state, the difference between the refractive index N1 of the dimming layer 3 and the refractive index N of the layer adjacent to the dimming layer 3 is larger, so that the light reflection at the position adjacent to the dimming layer 3 and the adjacent layer is stronger, the light transmission is weaker, namely, the light intensity reflected outwards by the dimming layer 3 can be increased, the light intensity transmitted to the first liquid crystal layer 5 by the dimming layer 3 is reduced, thereby reducing the light intensity leaked to the array substrate 6 by the first liquid crystal layer 5, further reducing the light intensity reflected by the array substrate 6, and reducing the brightness of the display panel in the screen-off state.

Fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the application. The light modulation layer 3 may be disposed between the first polarizer 1 and the color film substrate 4, the layer adjacent to the light modulation layer 3 may be the first polarizer 1 and the color film substrate 4, the refractive index N of the layer adjacent to the light modulation layer 3 may be the refractive index of the color film substrate 4 (i.e. the refractive index of glass), or may also be the refractive index of the first polarizer 1, since the refractive index of the first polarizer 1 is close to the refractive index of glass, the refractive indexes of both are near 1.5, and optionally, the refractive index N of the layer adjacent to the light modulation layer 3 may be the refractive index of glass when the light modulation layer 3 is disposed between the first polarizer 1 and the color film substrate 4.

Fig. 7 is a schematic structural diagram of a display panel according to another embodiment of the application. The dimming layer 3 may be disposed between the coating layer 2 and the color film substrate 4, that is, the layer adjacent to the dimming layer 3 may be the coating layer 2 and the color film substrate 4, the refractive index N of the layer adjacent to the dimming layer 3 may be the refractive index of the coating layer 2, or may also be the refractive index of the color film substrate 4 (that is, the refractive index of glass), in some embodiments, the refractive index of the coating layer 2 is close to the refractive index of the glass, for example, when the material of the coating layer 2 is PEDOT, the refractive indexes of both are near 1.5, and optionally, the refractive index N of the adjacent layer of the dimming layer 3 may be the refractive index of the glass when the dimming layer is disposed between the coating layer 2 and the color film substrate 4.

When the refractive indexes of two adjacent layers adjacent to the dimming layer 3 are different, namely, the refractive index of a first adjacent layer is N1, the refractive index of a second adjacent layer is N2, N1 is unequal to N2, and the dimming layer 3 is positioned between the first adjacent layer and the second adjacent layer. The refractive index n1 of the dimming layer 3 when the display panel is in the off-screen state and the refractive index n2 when the display panel is in the display state satisfy the following conditions: the refractive index of the light adjusting layer 3 when the display panel is in a screen-off state and the refractive index of two adjacent layers adjacent to the light adjusting layer are larger in average difference value, the light reflection of the positions adjacent to the light adjusting layer 3 and the two adjacent layers is stronger, the light transmission is weaker, the light intensity reflected by the array substrate 6 is reduced, and the brightness of the display panel in the screen-off state is reduced. And the refractive index of the dimming layer 3 is similar to the refractive indexes of two adjacent layers adjacent to the dimming layer 3 when the display panel is in a display state, so that the light transmission of the dimming layer 3 and the positions adjacent to the two adjacent layers is strong, the light intensity transmitted to the array substrate 6 through the dimming layer 3 can be increased, and the display effect is improved.

Specifically, as shown in fig. 8, fig. 8 is a schematic structural diagram of a display panel according to another embodiment of the present application. The dimming layer 3 may be disposed between the coating layer 2 and the first polarizer 1, and the layers adjacent to the dimming layer 3 are the coating layer 2 and the first polarizer 1. In some embodiments, the refractive index of the coating layer 2 is greatly different from the refractive index of the first polarizer 1 (refractive index of glass). For example, the refractive index of the coating layer 2 is n3, the refractive index of the first polarizer 1 is n7, the light adjusting layer 3 is configured to satisfy 0.15+.n1-n3+.0.45, 0.15+.n1-n7+.0.45, it may be 0.15, 0.2, 0.3, 0.35, 0.45, etc., it may be 0.15, 0.22, 0.29, 0.34, 0.45, i.e., the difference between n1 and n3, between n1 and n7 is large when the display panel is in the off-screen state; the dimming layer 3 is further configured to satisfy 0.ltoreq.n2-n3.ltoreq.0.1, 0.ltoreq.n2-n7.ltoreq.0.1, |n2-n3| may be 0, 0.05, 0.1, etc., |n2-n3| may be 0, 0.04, 0.06, 0.1, etc., i.e., the difference between n2 and n3, between n2 and n7 is small, when the display panel is in the display state.

When the display panel is in a display state, the refractive index n2 of the dimming layer 3 is equal to or close to the refractive index n3 of the coating layer 2, and the refractive index n2 of the dimming layer 3 is equal to or close to the refractive index n7 of the first polarizer 1, so that the light reflection at the position adjacent to the dimming layer 3 and the coating layer 2 is weaker, the light transmission is stronger, and the light reflection at the position adjacent to the dimming layer 3 and the first polarizer 1 is weaker, so that the light transmission is stronger, namely, the intensity of the light transmitted to the first liquid crystal box through the dimming layer 3 can be increased, thereby improving the display effect of the display panel in the display state. When the display panel is in a screen-off state, the difference between the refractive index n1 of the dimming layer 3 and the refractive index n3 of the coating layer 2 is larger, and the difference between the refractive index n1 of the dimming layer 3 and the refractive index n7 of the first polarizer 1 is larger, so that the light reflection at the position adjacent to the dimming layer 3 and the coating layer 2 is stronger, the light transmission is weaker, and the light reflection at the position adjacent to the dimming layer 3 and the first polarizer 1 is stronger, so that the light transmission is weaker, namely the light intensity of the light reflected outwards by the dimming layer 3 can be increased, the light intensity transmitted to the first liquid crystal layer 5 by the dimming layer 3 is reduced, the light intensity reflected by the array substrate 6 is reduced, and the brightness of the display panel in the screen-off state is reduced.

In the above embodiments, the light modulation layer 3 may be the electro-refractive index changing layer 32, and the electro-refractive index changing layer 32 may be a material with a refractive index that can be changed after being electrified, for example, lithium niobate, a silicon-based material, or the like. Specifically, the electrically-induced refractive index change layer 32 may have a structure having a refractive index n2 when energized and a refractive index n1 after deenergization; alternatively, the electro-refractive index change layer 32 may have a refractive index n2 when a forward current is applied and a refractive index n1 when a reverse current is applied.

In one embodiment, as shown in fig. 9 and 10, fig. 9 and 10 are schematic structural diagrams of a display panel according to another two embodiments of the present application. The electrorefractive index change layer 32 at least covers each pixel opening of the display area of the color film substrate 4, that is, when the display panel is in the off-screen state, external light is transmitted to each pixel opening of the color film substrate 4 through the electrorefractive index change layer 32. Meanwhile, since the difference between the refractive index N1 of the electro-refractive index change layer 32 when the display panel is in the screen-off state and the refractive index N of the layer adjacent to the electro-refractive index change layer 32 is larger, the intensity of light reflected outwards by the refractive index change layer 32 can be increased, the intensity of light transmitted to each pixel opening through the electro-refractive index change layer 32 can be reduced, namely, the intensity of light reflected through the array substrate 6 can be reduced, and the brightness of the display panel in the screen-off state can be further reduced.

In addition, since the black matrix 43 of the color film substrate 4 is opaque, the electro-refractive index change layer 32 does not need to cover the black matrix 43, thereby reducing the dosage of the electro-refractive index change layer 32 and lowering the cost.

Specifically, as shown in fig. 9 and 10, the electrorefractive index change layer 32 includes a fourth portion 321, a fifth portion 322, and a sixth portion 323, the fourth portion 321 covering the red sub-pixel opening, the fifth portion 322 covering the green sub-pixel opening, and the sixth portion 323 covering the blue sub-pixel opening. The fourth portion 321, the fifth portion 322, and the sixth portion 323 can reduce the intensity of light transmitted to the first liquid crystal cell when the display panel is in a off-screen state.

Wherein the electrically-induced refractive index change layer 32 is configured such that, when the display panel is in a rest state, the refractive index of the fourth portion 321 is N4, the refractive index of the fifth portion 322 is N5, and the refractive index of the sixth portion 323 is N6, wherein |n4-n| > |n5-n| > |n6-n|, i.e., the difference between the refractive index N4 of the fourth portion 321 and the refractive index N of the adjacent layer thereof is greater than the difference between the refractive index N5 of the fifth portion 322 and the refractive index N of the adjacent layer thereof, and the difference between the refractive index N5 of the fifth portion 322 and the refractive index N of the adjacent layer thereof is greater than the difference between the refractive index N6 of the sixth portion 323 and the refractive index N of the adjacent layer thereof. When the display panel is in the screen-off state, the light intensity reflected by the fourth portion 321 is greater than the light intensity reflected by the fifth portion 322, the light intensity reflected by the fifth portion 322 is greater than the light intensity reflected by the sixth portion 323, the light intensity transmitted to the first liquid crystal layer 5 through the fourth portion 321 is less than the light intensity transmitted to the first liquid crystal layer 5 through the fifth portion 322, the light intensity transmitted to the first liquid crystal layer 5 through the fifth portion 322 is less than the light intensity transmitted to the first liquid crystal layer 5 through the sixth portion 323, namely the intensity of red light reflected by the array substrate 6 is less than the intensity of green light and the intensity of green light is less than the intensity of blue light, the phenomenon that the display panel emits red in the screen-off state is improved, and at this time, the hue of the display panel in the screen-off state is bluish to meet the demands of users.

It should be noted that, in the present embodiment, the electric refractive index changing layer 32 is configured to be |n4-n| > |n5-n| > |n6-n| when the display panel is in the screen-off state, so as to make the screen-off color of the display panel blue, that is, the embodiment can satisfy a user who prefers blue, and when the user prefers other colors, it can be achieved by changing refractive indexes of three of the fourth portion 321, the fifth portion 322, and the sixth portion 323 of the electric refractive index changing layer 32 and refractive index differences of layers adjacent to the electric refractive index changing layer 32.

In the embodiment shown in fig. 7, the dimming layer 3 of the display panel is an electro-refractive index change layer, and the dimming layer 3 is disposed on a side of the coating layer 2 facing the color film substrate 4, in the embodiment shown in fig. 8, the dimming layer 3 of the display panel is an electro-refractive index change layer, and the dimming layer 3 is disposed on a side of the coating layer 2 facing away from the color film substrate 4. In the embodiment shown in fig. 7 and 8, the light modulation layer 3 is a film layer with the same thickness throughout, that is, in this embodiment, the light modulation layer 3 covers each pixel opening area and the black matrix.

In the embodiment shown in fig. 9, the dimming layer of the display panel is an electro-refractive index change layer 32, the electro-refractive index change layer 32 is disposed on one side of the coating layer 2 facing the color film substrate 4, and the electro-refractive index change layer 32 only covers the opening area of each pixel and does not cover the black matrix 43, that is, the electro-refractive index change layer 32 includes the fourth portion 321, the fifth portion 322 and the sixth portion 323, and gaps are formed between the fourth portion 321, the fifth portion 322 and the sixth portion 323, and correspond to the black matrix 43, the optical adhesive 33 may be disposed in the gaps, and the optical adhesive 33 may function as a flat layer and may be used to connect the coating layer 2 adjacent to the electro-refractive index change layer 32 and the color film substrate 4.

In other embodiments, as shown in fig. 10, the electrorefractive index change layer 32 is located between the glass substrate 41 and the color film layer 42, i.e. within the color film substrate 4. Specifically, the electrically-induced refractive index changing layer 32 may be located on the same layer as the black matrix 43, and the electrically-induced refractive index changing layer 32 covers only the pixel opening regions, and does not cover the black matrix 43, i.e., the electrically-induced refractive index changing layer 32 includes the fourth portion 321, the fifth portion 322, and the sixth portion 323 described above, and the black matrix 43 is located between the fourth portion 321 and the fifth portion 322, and between the fifth portion 322 and the sixth portion 323, i.e., the fourth portion 321 and the fifth portion 322 are separated by the black matrix 43, and the fifth portion 322 and the sixth portion 323 are separated by the black matrix 43. The arrangement of the electrorefractive index change layer 32 in this embodiment can reduce the thickness of the display panel.

In the embodiment shown in fig. 6, the display panel does not include the coating layer 2, and at this time, conductive particles may be disposed in the first polarizer 2, thereby preventing electrostatic shock.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (14)

1. The display panel is characterized by comprising a first liquid crystal box, wherein the first liquid crystal box comprises a color film substrate, an array substrate and a first liquid crystal layer positioned between the color film substrate and the array substrate, a first polaroid is arranged on one side, away from the first liquid crystal layer, of the color film substrate, and a second polaroid is arranged on one side, away from the first liquid crystal layer, of the array substrate;

the display panel further comprises a dimming layer, wherein the dimming layer is positioned on one side, away from the array substrate, of the first liquid crystal layer, and the dimming layer is used for reducing light transmitted to the first liquid crystal layer when the display panel is in a screen-off state.

2. The display panel of claim 1, wherein the dimming layer comprises an electrochromic layer and is configured to be opaque when the display panel is in a off-screen state, and to be capable of reflecting light of a preset color, and is configured to be transparent when the display panel is in a display state.

3. The display panel of claim 1, wherein the dimming layer comprises an electrochromic layer, the color film substrate comprises a display area, the display area comprises a plurality of pixel openings, the color film substrate comprises a glass substrate, a black matrix and a color film layer, the black matrix is arranged on one side of the glass substrate, the black matrix comprises a hollowed-out portion, the color film layer is at least partially positioned in the hollowed-out portion, the pixel openings correspond to the hollowed-out portion, and the electrochromic layer at least covers each pixel opening.

4. The display panel of claim 3, wherein the plurality of pixel openings includes a red sub-pixel opening, a green sub-pixel opening, and a blue sub-pixel opening, the electrochromic layer includes a first portion, a second portion, and a third portion, the first portion covering the red sub-pixel opening, the second portion covering the green sub-pixel opening, and the third portion covering the blue sub-pixel opening;

the electrochromic layer is configured such that when the display panel is in a rest state, a transmittance of the first portion is less than a transmittance of the second portion, which is less than a transmittance of the third portion.

5. A display panel according to claim 3, wherein the electrochromic layer does not cover the black matrix.

6. The display panel according to any one of claims 3 to 5, further comprising a coating layer between the color film substrate and the first polarizer, wherein the electrochromic layer is disposed on at least one side surface of the coating layer in a thickness direction of the display panel.

7. The display panel of any one of claims 3-5, wherein the electrochromic layer is located between the glass substrate and the color film layer.

8. The display panel according to claim 1, wherein the light adjusting layer is configured to have a refractive index of N1 when the display panel is in a screen-off state, a refractive index of N2 when the display panel is in a display state, and refractive indexes of N, N1 and N2 of adjacent layers to the light adjusting layer satisfy 0.15 +.n1-n+. 0.45,0 +.n2-N +.0.1.

9. The display panel of claim 8, wherein the dimming layer comprises an electrorefractive index change layer, the color film substrate comprises a display area, the display area comprises a plurality of pixel openings, the color film substrate comprises a glass substrate, a black matrix and a color film layer, the black matrix is arranged on one side of the glass substrate, the black matrix comprises a hollowed-out portion, the color film layer is at least partially positioned in the hollowed-out portion, the pixel openings correspond to the hollowed-out portion, and the electrorefractive index change layer at least covers each pixel opening.

10. The display panel of claim 9, wherein a plurality of the pixel openings include a red sub-pixel opening, a green sub-pixel opening, and a blue sub-pixel opening, the electro-refractive index change layer includes a fourth portion, a fifth portion, and a sixth portion, the fourth portion covering the red sub-pixel opening, the fifth portion covering the green sub-pixel opening, and the sixth portion covering the blue sub-pixel opening;

the electro-refractive index change layer is configured such that when the display panel is in a screen-off state, the refractive index of the fourth portion is N4, the refractive index of the fifth portion is N5, and the refractive index of the sixth portion is N6, wherein |n4-n| > |n5-n| > |n6-n|.

11. The display panel according to claim 9, wherein the electrically-induced refractive index change layer does not cover the black matrix.

12. The display panel of any one of claims 9-11, further comprising a coating layer between the color film substrate and the first polarizer, the electrorefractive index change layer disposed between the coating layer and the first polarizer;

the refractive index of the film coating layer is n3, the refractive index of the first polarizer is n7, the electro-refractive index change layer is configured to satisfy 0.15 < n1-n3 < 0.45,0.15 < n1-n7 < 0.45 when the display panel is in a screen-off state, and the electro-refractive index change layer is configured to satisfy 0 < n2-n3 < 0.1,0 < n2-n7 < 0.1 when the display panel is in a display state.

13. The display panel according to any one of claims 9 to 11, wherein the electro-refractive index change layer is located between the glass substrate and the color film layer.

14. A display device, characterized in that the display device comprises the display panel of any one of claims 1-13.