Display panel and display device

Abstract

The present application relates to a display device and a display panel, wherein the display panel comprises 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 located therebetween, wherein a side of the color film substrate away from the first liquid crystal layer has a first polarizer, and a side of the array substrate away from the first liquid crystal layer has a second polarizer; the display panel further comprises a dimming layer, wherein the dimming layer is located on a side of the first liquid crystal layer away from the array substrate, wherein the dimming layer is used to reduce the light transmitted to the first liquid crystal layer when the display panel is in a screen-off state, thereby reducing the intensity of the light reflected by the array substrate and reducing the brightness of the display panel in the screen-off state.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] At present, liquid crystal displays are widely used display products due to their advantages such as thinness, low driving voltage, and low power consumption. As people's requirements for display products continue to increase, higher requirements are placed not only on the performance of displays in display state, but also on the performance of displays when the screen is off. When the current display is in the off state, light is reflected when it hits the inside of the display. Due to the strong reflection inside the display, the brightness of the display in the off state is too high and cannot meet the user's requirements. Summary of the invention

[0003] The embodiment of the present application provides a display device and a display panel, wherein the display panel includes a first liquid crystal box, wherein the first liquid crystal box includes a color filter substrate, an array substrate, and a first liquid crystal layer located therebetween, wherein a first polarizer is provided on a side of the color filter substrate away from the first liquid crystal layer, and a second polarizer is provided on a side of the array substrate away from the first liquid crystal layer;

[0004] The display panel also includes a dimming layer, which is located on the side of the first liquid crystal layer away from the array substrate. The dimming layer is used to reduce the light transmitted to the first liquid crystal layer when the display panel is in the screen-off state, thereby reducing the intensity of light reflected by the array substrate and reducing the brightness of the display panel when the screen is in the screen-off state.

[0005] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of the structure of a display panel provided in this application;

[0007] Figure 2 A schematic diagram of the structure of a display panel provided in the present application in a specific embodiment;

[0008] Figure 3 A schematic diagram of the structure of a display panel provided in the present application in another specific embodiment;

[0009] Figure 4 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0010] Figure 5 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0011] Figure 6 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0012] Figure 7 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0013] Figure 8 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0014] Fig. 9 This is a schematic structural diagram of a display panel provided in the present application in another specific embodiment;

[0015] Fig.10 This is a schematic structural diagram of a display panel provided in the present application in yet another specific embodiment.

[0016] Reference numerals:

[0017] 1- first polarizer;

[0018] 2- coating layer;

[0019] 3-Dimming layer;

[0020] 31-electrochromic layer;

[0021] 311-Part I;

[0022] 312-Part II;

[0023] 313-Part III;

[0024] 32-electrorefractive index changing layer;

[0025] 321-Part IV;

[0026] 322-Part V;

[0027] 323-Part VI;

[0028] 33-optical glue;

[0029] 4-Color filter substrate;

[0030] 41- glass substrate;

[0031] 42-color film layer;

[0032] 421-red color resistance;

[0033] 422-green color resistance;

[0034] 423-blue color resistance;

[0035] 43- black matrix;

[0036] 5-first liquid crystal layer;

[0037] 6-array substrate;

[0038] 7- second polarizer;

[0039] 8-Liquid crystal box;

[0040] 81- a first transparent substrate;

[0041] 82- a second transparent substrate;

[0042] 83- second liquid crystal layer;

[0043] 91- third polarizer;

[0044] 92-Fourth polarizer.

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0046] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0048] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0049] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0051] The embodiment of the present application provides a display device, which includes a display panel, a backlight module, a control and driving circuit and other components. The backlight module is located below the display panel and serves as the light source of the display panel. Figure 1 As shown, Figure 1 A schematic diagram of the structure of a display panel provided in the present application. The display panel includes a first liquid crystal box, which includes a color filter substrate 4, an array substrate 6, and a first liquid crystal layer 5 located therebetween, the color filter substrate 4 having a first polarizer 1 on a side away from the first liquid crystal layer 5, and the array substrate 6 having a second polarizer 7 on a side away from the first liquid crystal layer 5.

[0052] When the display panel is in the off state (non-display state), that is, the backlight module under the display panel is not lit and all sub-pixels are in the off state, ideally, the light irradiating the display panel cannot pass through the first liquid crystal layer 5, that is, no light irradiates the array substrate 6. Figure 1 As shown, in actual situations, the first liquid crystal layer 5 has a light leakage problem, that is, part of the light irradiating the display panel is transmitted to the array substrate 6 through the first liquid crystal layer 5, and is reflected out of the display panel through the array substrate 6. When the light intensity leaking to the array substrate 6 is large, the light intensity reflected by the array substrate 6 is also large, resulting in a large brightness of the display panel in the screen-off state, affecting the user experience of the display panel in the screen-off state. In order to solve this technical problem, in the embodiment of the present application, Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the display panel provided in the present application in a specific embodiment. The display panel also includes a dimming layer 3, which is located on the side of the first liquid crystal layer 5 away from the array substrate 6. The dimming layer 3 is used to reduce the light transmitted to the first liquid crystal layer 5 when the display panel is in the screen-off state, thereby reducing the light leaking to the array substrate 6 through the first liquid crystal layer 5, and further reducing the intensity of the light reflected by the array substrate 6, thereby reducing the brightness of the display panel when the screen is in the screen-off state.

[0053] like Figure 3 As shown, Figure 3A schematic structural diagram of another specific embodiment of a display panel provided in the present application, the display panel may further include a coating layer 2 arranged on a side of the first liquid crystal box facing the first polarizer 1, the coating layer 2 is used to reduce the risk of electrostatic damage to the display panel. Figure 3 In the illustrated embodiment, the dimming layer 3 is disposed on the side of the coating layer 2 facing the color filter substrate 4. In other embodiments, the dimming layer 3 may also be disposed on the side of the coating layer 2 facing away from the color filter substrate 4.

[0054] In a specific embodiment, the dimming layer 3 includes an electrochromic layer, which is configured to be transparent when the display panel is in a display state, and the transparent electrochromic layer will not affect the normal display of the display panel, wherein the display panel is in a display state means that: the backlight module located below the display panel is lit, and the sub-pixels of the first display area of ​​the display panel are turned on, so that the light of the backlight module can pass through the display panel to achieve display. At the same time, the electrochromic layer is also configured to be opaque when the display panel is in a screen-off state, and can reflect light of a preset color. Therefore, the electrochromic layer can block light from being transmitted to the first liquid crystal layer 5 when the display panel is in a screen-off state, so that almost no light is transmitted to the array substrate 6 when the display panel is in a screen-off state, so that the array substrate 6 does not reflect light outward, and the electrochromic layer can reflect light with a preset color, so that the display panel can be a preset color when it is in a screen-off state, and the preset color can be a color desired by the user, so that the hue of the display panel in the screen-off state can be accepted by the user.

[0055] For example, when the electrochromic layer is configured to be transparent when the display panel is in the display state and black when the screen is off, the display panel is black when the screen is off, thereby improving the integrated black effect of the display panel when the screen is off. When the electrochromic layer is configured to be transparent when the display panel is in the display state and blue when the screen is off, the display panel is blue when the screen is off.

[0056] Specifically, the electrochromic layer 31 may be a structure that is transparent when powered on and displays a preset color when powered off, or the electrochromic layer 31 may be a structure that is transparent when a forward current is passed and displays a preset color when a reverse current is passed. For example, the electrochromic layer 31 may be made of tungsten trioxide or the like.

[0057] In a specific embodiment, the color filter substrate 4 includes a display area, and the display area includes a plurality of pixel openings, such as Figure 4 and Figure 5 As shown, Figure 4 and Figure 5Schematic diagram of the structure of the display panel provided in the present application in two other specific embodiments. The color filter substrate 4 includes a glass substrate 41, a black matrix 43 and a color filter layer 42, the black matrix 43 is arranged on one side of the glass substrate 41, and the black matrix 43 includes a hollow portion, the color filter layer 42 is at least partially located in the hollow portion, and the pixel opening corresponds to the hollow portion. The dimming layer 3 in this embodiment can be an electrochromic layer 31, and the electrochromic layer 31 at least covers each pixel opening, thereby reducing the light transmitted to each pixel opening through the electrochromic layer 31, and reducing the brightness displayed by each sub-pixel. At the same time, 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 the electrochromic layer 31 and reducing costs.

[0058] Specifically, the plurality of pixel openings in the display area of ​​the color filter substrate 4 include a red sub-pixel opening, a green sub-pixel opening and a blue sub-pixel opening. Figure 4 and Figure 5 In the illustrated embodiment, the color filter layer 42 of the color filter substrate 4 includes a red color resist 421, a green color resist 422, and a blue color resist 423. The red color resist 421 at least covers the red sub-pixel opening, the green color resist 422 at least covers the green sub-pixel opening, and the blue color resist 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. When the brightness of the red light, green light, and blue light is different, light of different colors and brightness can be obtained to achieve display.

[0059] In some embodiments, when the display panel is in the off state, the red light in the spectrum reflected by the array substrate 6 is stronger, so that the display panel turns red in the off state, which cannot meet the needs of some users. In order to solve this technical problem, the embodiment of the present 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 state.

[0060] like Figure 4 and Figure 5 In the illustrated embodiment, the electrochromic layer 31 may include a first portion 311, a second portion 312, and a third portion 313. The first portion 311 covers the red sub-pixel opening, the second portion 312 covers the green sub-pixel opening, and the third portion 313 covers 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 pass through the display panel to achieve display.

[0061] When the display panel is in the screen-off state, the color of the first part 311 of the electrochromic layer 31 changes to the first color (the first color may be a color other than red), and when ambient light irradiates the first part 311, the first part 311 can block a portion of the red light, that is, it can reduce the transmittance of the red light, thereby reducing the light intensity transmitted to the red sub-pixel through the first part 311. Similarly, when the display panel is in the screen-off state, the color of the second part 312 of the electrochromic layer 31 changes to the second color (the second color may be a color other than green), and when ambient light irradiates the second part 312, the second part 312 can block a portion of the green light, that is, it can reduce the transmittance of the green light, thereby reducing the light intensity transmitted to the green sub-pixel through the second part 312, and the third part 313 can reduce the light intensity transmitted to the blue sub-pixel through the third part 311. When the display panel is in the screen-off state, the color of the third part 313 of the electrochromic layer 31 changes to a third color (the third color may be a color other than blue). When ambient light shines on the third part 313, the third part 313 can block a portion of the blue light, that is, it can reduce the transmittance of the blue light, thereby reducing the light intensity transmitted through the third part 313 to the blue sub-pixel.

[0062] At the same time, the electrochromic layer 31 is also configured that when the display panel is in the screen-off state, the transmittance of the first part 311 to red light is less than the transmittance of the second part 312 to green light, and the transmittance of the second part 312 to green light is less than the transmittance of the third part 313 to blue light, that is, the intensity of the red light transmitted to the first liquid crystal layer 5 through the first part 311 is less than the intensity of the green light transmitted to the first liquid crystal layer 5 through the second part 312, and the intensity of the green light transmitted to the first liquid crystal layer 5 through the second part 312 is less than the intensity of the blue light transmitted to the first liquid crystal layer 5 through the third part 313, thereby reducing the intensity of red light in the spectrum reflected by the array substrate 6 and improving the phenomenon of the display panel turning red when the screen is in the screen-off state to meet the needs of users.

[0063] It should be noted that, in the present embodiment, the electrochromic layer 31 is configured so that when the display panel is in the screen-off state, the transmittance of the first portion 311 is less than the transmittance of the second portion 312, and the transmittance of the second portion 312 is less than the transmittance of the third portion 313. This is to make the reflective hue of the display panel in the screen-off state biased towards blue. That is, this embodiment can satisfy users who have a preference for blue. When the user has a preference for 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.

[0064] In the above embodiments, Figure 3 and Figure 4As shown, the display panel may further include a coating layer 2 located on the side of the color filter substrate 4 away from the first liquid crystal layer 5, the coating layer 2 is used to prevent electrostatic damage, and the material of the coating layer 2 may be polyethylene dioxythiophene (PEDOT for short), which is nearly transparent and has little effect on the reflective hue of the display panel when the screen is off. The electrochromic layer 31 may be disposed on at least one side of the coating layer 2 along the thickness direction of the display panel.

[0065] like Figure 3 In the shown embodiment, the dimming layer 3 of the display panel is an electrochromic layer, and the dimming layer 3 is arranged on the side of the coating layer 2 facing the color film substrate 4, and in this embodiment, the dimming layer 3 is a film layer with the same thickness everywhere, that is, in this embodiment, the dimming layer 3 covers each pixel opening area and the black matrix.

[0066] like Figure 4 In the illustrated embodiment, the dimming layer of the display panel is an electrochromic layer 31, and the electrochromic layer 31 is arranged on the side of the coating layer 2 facing the color film substrate 4, and the electrochromic layer 31 only covers the opening areas of each pixel, and does not cover the black matrix 43, that is, the electrochromic layer 31 includes the first part 311, the second part 312 and the third part 313 mentioned above, and there is a gap between the first part 311, the second part 312 and the third part 313, and the gap corresponds to the black matrix 43. An optical glue 33 can be arranged in the gap, and the optical glue 33 can act as a flat layer and can be used to connect the coating layer 2 and the color film substrate 4 adjacent to the electrochromic layer 31.

[0067] In other embodiments, Figure 5 As shown, the electrochromic layer 31 is located between the glass substrate 41 and the color filter layer 42, that is, located in the color filter substrate 4. Specifically, the electrochromic layer 31 can be located in the same layer as the black matrix 43, and the electrochromic layer 31 only covers the opening area of ​​each pixel, and does not cover the black matrix 43, that is, the electrochromic layer 31 includes the first part 311, the second part 312 and the third part 313 described above, and there is a black matrix 43 between the first part 311 and the second part 312, and between the second part 312 and the third part 313, that is, the first part 311 and the second part 312 are separated by the black matrix 43, and the second part 312 and the third part 313 are separated by the black matrix 43. The arrangement of the electrochromic layer 31 in this embodiment can reduce the thickness of the display panel.

[0068] like Figure 5 In the illustrated embodiment, the display panel may not include the coating layer 2. In this case, the first polarizer 2 may be provided with conductive particles to prevent electrostatic shock.

[0069] In other embodiments, the dimming layer 3 in the embodiments of the present application can also be configured to have a refractive index of n1 when the display panel is in the screen-off state, a refractive index of n2 when the display panel is in the display state, and a refractive index of N in the layer adjacent to the dimming layer 3, n1 and n2 satisfy 0.15≤|n1-N|≤0.45, 0≤|n2-N|≤0.1, |n1-N| can be 0.15, 0.2, 0.3, 0.35, 0.45, etc., that is, the difference between n1 and N is large, |n2-N| can be 0, 0.05, 0.1, etc., that is, the difference between n2 and N is small, and the two can be equal.

[0070] When the display panel is in the display state, the refractive index n2 of the dimming layer 3 is equal to or close to the refractive index N of the layer adjacent to the dimming layer 3, so that the position adjacent to the dimming layer 3 reflects light weakly and transmits light strongly, reducing the risk of too low light intensity transmitted to the first liquid crystal box below the dimming layer 3 due to the setting of the dimming layer 3, so that the display panel has a good display effect when the dimming layer 3 is set. When the display panel is in the 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 large, so that the position adjacent to the dimming layer 3 reflects light strongly and transmits light weakly, that is, it can increase the intensity of light reflected outward by the dimming layer 3 and reduce the intensity of light transmitted to the first liquid crystal layer 5 by the dimming layer 3, thereby reducing the intensity of light leaking to the array substrate 6 through the first liquid crystal layer 5, and then reducing the intensity of light reflected by the array substrate 6, and reducing the brightness of the display panel in the screen-off state.

[0071] Among them, Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of the display panel provided in the present application in a specific embodiment. The dimming layer 3 can be arranged between the first polarizer 1 and the color film substrate 4, and the layer adjacent to the dimming layer 3 can be the first polarizer 1 and the color film substrate 4. The refractive index N of the layer adjacent to the dimming layer 3 can be the refractive index of the color film substrate 4 (i.e., the refractive index of the glass), or it can also be the refractive index of the first polarizer 1. Since the refractive index of the first polarizer 1 is close to that of the glass, the refractive indexes of both are around 1.5. Optionally, when the dimming layer 3 is located between the first polarizer 1 and the color film substrate 4, the refractive index N of the layer adjacent to the dimming layer 3 can be the refractive index of the glass.

[0072] like Figure 7 As shown, Figure 7This is a schematic diagram of the structure of the display panel provided in the present application in another specific embodiment. The dimming layer 3 can be arranged between the coating layer 2 and the color filter substrate 4, that is, the layer adjacent to the dimming layer 3 can be the coating layer 2 and the color filter substrate 4, and the refractive index N of the layer adjacent to the dimming layer 3 can be the refractive index of the coating layer 2, or, it can also be the refractive index of the color filter 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 around 1.5. Optionally, when the dimming layer is located between the coating layer 2 and the color filter substrate 4, the refractive index N of the adjacent layer of the dimming layer 3 can be the refractive index of the glass.

[0073] When the refractive indexes of the two adjacent layers adjacent to the dimming layer 3 are different, that is, the refractive index of the first adjacent layer is N1, and the refractive index of the second adjacent layer is N2, N1 and N2 are not equal, and the dimming layer 3 is located 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 screen-off state and the refractive index n2 of the dimming layer 3 when the display panel is in the display state meet the following conditions: 0.15≤|n1-N1|≤0.45, 0.15≤|n1-N2|≤0.45, 0≤|n2-N1|≤0.1, 0≤|n2-N2|≤0.1, so that the refractive index of the dimming layer 3 when the display panel is in the screen-off state and the refractive index of the two adjacent layers thereof are greatly different, and then the dimming layer 3 and the adjacent positions of the two adjacent layers reflect light strongly and transmit light weakly, thereby reducing the light intensity reflected by the array substrate 6 and reducing the brightness of the display panel in the screen-off state. Moreover, the refractive index of the dimming layer 3 when the display panel is in the display state is similar to the refractive index of the two adjacent layers, so that the adjacent positions of the dimming layer 3 and the two adjacent layers have strong light transmission, thereby increasing the light intensity transmitted to the array substrate 6 through the dimming layer 3 and improving the display effect.

[0074] Specifically, Figure 8 As shown, Figure 8This is a schematic diagram of the structure of the display panel provided in the present application in another specific embodiment. The dimming layer 3 can be arranged 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 significantly different from the refractive index of the first polarizer 1 (the refractive index of glass). For example, the refractive index of the coating layer 2 is n3, and the refractive index of the first polarizer 1 is n7. The dimming layer 3 is configured to satisfy 0.15≤|n1-n3|≤0.45, 0.15≤|n1-n7|≤0.45 when the display panel is in the screen-off state, |n1-n3| can be 0.15, 0.2, 0.3, 0.35, 0.45, etc., and |n1-n7| can be 0.15, 0.22, 0.29, 0.34 , 0.45, that is, the differences between n1 and n3, and between n1 and n7 are large; the dimming layer 3 is also configured to satisfy 0≤|n2-n3|≤0.1, 0≤|n2-n7|≤0.1 when the display panel is in the display state, |n2-n3| can be 0, 0.05, 0.1, etc., |n2-n3| can be 0, 0.04, 0.06, 0.1, etc., that is, the differences between n2 and n3, and between n2 and n7 are small.

[0075] When the display panel is in the 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 dimming layer 3 and the coating layer 2 adjacent position reflect light weakly and transmit light strongly, and the dimming layer 3 and the first polarizer 1 adjacent position reflect light weakly and transmit light strongly, that is, the intensity of 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 when it is in the display state. When the display panel is in the 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 large, and the difference between the refractive index n1 of the dimming layer 3 and the refractive index n7 of the first polarizer 1 is large, so that the dimming layer 3 and the coating layer 2 are adjacent to the position where the light is reflected strongly and the light is transmitted weakly, and the dimming layer 3 and the first polarizer 1 are adjacent to the position where the light is reflected strongly and the light is transmitted weakly, that is, the intensity of light reflected outward by the dimming layer 3 can be increased, and the intensity of light transmitted to the first liquid crystal layer 5 through the dimming layer 3 can be reduced, thereby reducing the intensity of light reflected by the array substrate 6 and reducing the brightness of the display panel when the screen is in the screen-off state.

[0076] In the above embodiments, the dimming layer 3 may be an electro-refractive index variable layer 32, and the electro-refractive index variable layer 32 may be a material whose refractive index can be changed after power is applied, such as lithium lithium niobate, silicon-based materials, etc. Specifically, the electro-refractive index variable layer 32 may have a structure with a refractive index of n2 when power is applied and a refractive index of n1 after power is removed; or, the electro-refractive index variable layer 32 may also have a structure with a refractive index of n2 when a forward current is applied and a refractive index of n1 when a reverse current is applied.

[0077] In a specific embodiment, Fig. 9 and Fig.10 As shown, Fig. 9 and Fig.10 Schematic diagram of the structure of the display panel provided in the present application in two other specific embodiments. The electro-refractive index changing 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 screen-off state, the external light is transmitted to each pixel opening of the color film substrate 4 through the electro-refractive index changing layer 32. At the same time, since the difference between the refractive index n1 of the electro-refractive index changing 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 changing layer 32 is large, the intensity of light reflected outward by the refractive index changing layer 32 can be increased, and the intensity of light transmitted to each pixel opening through the electro-refractive index changing layer 32 can be reduced, that is, the intensity of light reflected by the array substrate 6 can be reduced, thereby reducing the brightness of the display panel in the screen-off state.

[0078] In addition, since the black matrix 43 of the color filter substrate 4 is opaque, the electro-refractive index changing layer 32 does not need to cover the black matrix 43 , thereby reducing the amount of the electro-refractive index changing layer 32 and lowering the cost.

[0079] Specifically, Fig. 9 and Fig.10 As shown, the electro-refractive index variable layer 32 includes a fourth portion 321, a fifth portion 322 and a sixth portion 323. The fourth portion 321 covers the red sub-pixel opening, the fifth portion 322 covers the green sub-pixel opening, and the sixth portion 323 covers the blue sub-pixel opening. When the display panel is in the screen-off state, the fourth portion 321, the fifth portion 322 and the sixth portion 323 can reduce the light intensity transmitted to the first liquid crystal cell.

[0080] Among them, the electrorefractive index change layer 32 is configured that when the display panel is in the screen-off state, the refractive index of the fourth part 321 is n4, the refractive index of the fifth part 322 is n5, and the refractive index of the sixth part 323 is n6, wherein, |n4-N|>|n5-N|>|n6-N|, that is, the difference between the refractive index n4 of the fourth part 321 and the refractive index N of the adjacent layer is greater than the difference between the refractive index n5 of the fifth part 322 and the refractive index N of the adjacent layer, and the difference between the refractive index n5 of the fifth part 322 and the refractive index N of the adjacent layer is greater than the difference between the refractive index n6 of the sixth part 323 and the refractive index N of the adjacent layer. When the display panel is in the screen-off state, the light intensity reflected by the fourth part 321 is greater than the light intensity reflected by the fifth part 322, the light intensity reflected by the fifth part 322 is greater than the light intensity reflected by the sixth part 323, the light intensity transmitted to the first liquid crystal layer 5 through the fourth part 321 is less than the light intensity transmitted to the first liquid crystal layer 5 through the fifth part 322, the light intensity transmitted to the first liquid crystal layer 5 through the fifth part 322 is less than the light intensity transmitted to the first liquid crystal layer 5 through the sixth part 323, that is, the intensity of the red light reflected by the array substrate 6 is less than the intensity of the green light, and the intensity of the green light is less than the intensity of the blue light, thereby improving the phenomenon of the display panel turning red when the screen is in the screen-off state. At this time, the hue of the display panel in the screen-off state is blue to meet the needs of users.

[0081] It should be noted that, in the present embodiment, the electrorefractive index change layer 32 is configured such that when the display panel is in the screen-off state, |n4-N|>|n5-N|>|n6-N| is intended to make the screen-off hue of the display panel biased towards blue. That is, this embodiment can satisfy users who prefer blue. When the user has a preference for other colors, this can be achieved by changing the refractive indices of the fourth portion 321, the fifth portion 322 and the sixth portion 323 of the electrorefractive index change layer 32 and the refractive index difference of the layers adjacent to the electrorefractive index change layer 32.

[0082] like Figure 7 In the embodiment shown, the dimming layer 3 of the display panel is an electro-refractive index changing layer, and the dimming layer 3 is arranged on the side of the coating layer 2 facing the color filter substrate 4, as shown in FIG. Figure 8 In the embodiment shown, the dimming layer 3 of the display panel is an electro-refractive index changing layer, and the dimming layer 3 is arranged on the side of the coating layer 2 away from the color filter substrate 4. Figure 7 and Figure 8 In the illustrated embodiment, the dimming layer 3 is a film layer with the same thickness at all locations, that is, in this embodiment, the dimming layer 3 covers each pixel opening area and the black matrix.

[0083] like Fig. 9In the illustrated embodiment, the dimming layer of the display panel is an electrorefractive index changing layer 32, and the electrorefractive index changing layer 32 is arranged on the side of the coating layer 2 facing the color film substrate 4, and the electrorefractive index changing layer 32 only covers the opening areas of each pixel, and does not cover the black matrix 43, that is, the electrorefractive index changing layer 32 includes the fourth part 321, the fifth part 322 and the sixth part 323 described above, and there is a gap between the fourth part 321, the fifth part 322 and the sixth part 323, and the gap corresponds to the black matrix 43. An optical glue 33 can be arranged in the gap. The optical glue 33 can act as a flat layer and can be used to connect the coating layer 2 and the color film substrate 4 adjacent to the electrorefractive index changing layer 32.

[0084] In other embodiments, Fig.10 As shown, the electrorefractive index changing layer 32 is located between the glass substrate 41 and the color filter layer 42, that is, located in the color filter substrate 4. Specifically, the electrorefractive index changing layer 32 can be located in the same layer as the black matrix 43, and the electrorefractive index changing layer 32 only covers the opening area of ​​each pixel, and does not cover the black matrix 43, that is, the electrorefractive index changing layer 32 includes the fourth part 321, the fifth part 322 and the sixth part 323 described above, and there is a black matrix 43 between the fourth part 321 and the fifth part 322, and between the fifth part 322 and the sixth part 323, that is, the fourth part 321 and the fifth part 322 are separated by the black matrix 43, and the fifth part 322 and the sixth part 323 are separated by the black matrix 43. The arrangement of the electrorefractive index changing layer 32 in this embodiment can reduce the thickness of the display panel.

[0085] like Figure 6 In the illustrated embodiment, the display panel does not include the coating layer 2. In this case, the first polarizer 2 may be provided with conductive particles to prevent electrostatic shock.

[0086] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a first liquid crystal box, the first liquid crystal box includes a color filter substrate, an array substrate and a first liquid crystal layer located therebetween, a side of the color filter substrate away from the first liquid crystal layer has a first polarizer, a side of the array substrate away from the first liquid crystal layer has a second polarizer, the color filter substrate includes a display area, the display area includes a plurality of pixel openings, the plurality of pixel openings include a red sub-pixel opening, a green sub-pixel opening and a blue sub-pixel opening; The display panel further comprises a dimming layer, the dimming layer being located on a side of the first liquid crystal layer away from the array substrate, the dimming layer being used to reduce light transmitted to the first liquid crystal layer when the display panel is in a screen-off state; the dimming layer being configured to have a refractive index of n1 when the display panel is in the screen-off state and a refractive index of n2 when the display panel is in a display state, a refractive index of a layer adjacent to the dimming layer being N, and n1 and n2 satisfying 0.15≤|n1-N|≤0.45, and 0≤|n2-N|≤0.1; The dimming layer includes an electro-refractive index changing layer, the electro-refractive index changing layer includes a fourth portion, a fifth portion and a sixth portion, the fourth portion covers the red sub-pixel opening, the fifth portion covers the green sub-pixel opening, and the sixth portion covers the blue sub-pixel opening; The electrorefractive index changing layer is configured such that when the display panel is in the 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|.

2. The display panel according to claim 1, characterized in that: The color filter substrate includes a glass substrate, a black matrix and a color filter layer, the black matrix is ​​arranged on one side of the glass substrate, and the black matrix includes a hollow portion, the color filter layer is at least partially located in the hollow portion, the pixel openings correspond to the hollow portions, and the electro-refractive index change layer at least covers each of the pixel openings.

3. The display panel according to claim 2, characterized in that: The electrorefractive index variable layer does not cover the black matrix.

4. The display panel according to claim 2 or 3, characterized in that: The display panel further includes a coating layer located between the color filter substrate and the first polarizer, and the electro-refractive index variable layer is disposed between the coating layer and the first polarizer; The refractive index of the 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 and 0.15≤|n1-n7|≤0.45 when the display panel is in the screen-off state, and the electro-refractive index change layer is configured to satisfy 0≤|n2-n3|≤0.1 and 0≤|n2-n7|≤0.1 when the display panel is in the display state.

5. The display panel according to claim 2 or 3, characterized in that: The electro-refractive index changing layer is located between the glass substrate and the color filter layer.

6. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 5.

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