CN112578597A

CN112578597A - Color film substrate, display panel and display device

Info

Publication number: CN112578597A
Application number: CN202011366711.2A
Authority: CN
Inventors: 康志聪; 李伟
Original assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-30

Abstract

The application discloses a color film substrate, a display panel and a display device. Wherein, this various membrane base plate includes: a substrate, a photoresist layer and a plurality of filters. The LED lamp comprises a substrate, wherein a driving circuit is arranged on the substrate, a plurality of LED lamp beads are arranged on the driving circuit, and a plurality of sub-pixels are formed by the plurality of LED lamp beads; the light resistance layer and the substrate are arranged in a laminated mode and cover the driving circuit, an accommodating groove is formed in the light resistance layer corresponding to each sub-pixel, and the light resistance layer is made of opaque materials; the plurality of optical filters are covered on the notches of the plurality of accommodating grooves. According to the color film substrate, blue light generated in the area corresponding to part of the sub-pixels is reduced through the plurality of optical filters, so that the display effect of the display device is improved.

Description

Color film substrate, display panel and display device

Technical Field

The application relates to the technical field of display devices, in particular to a color film substrate, a display panel using the color film substrate and a display device.

Background

The quantum fluorescent powder has the characteristic of high color vividness, and is mostly applied to a display device at present by using a photoluminescence method to enable the quantum fluorescent powder, namely blue light is used for exciting red and green quantum fluorescent powder to generate red and green light. At present, quantum fluorescent powder is manufactured into an optical film, the optical film is disposed on a backlight structure of a display device, and blue light emitted by a blue LED chip is used to excite red quantum fluorescent powder and green quantum fluorescent powder of the optical film to generate red light and green light. However, based on the above optical structure, when the blue LED chip emits light to excite the red quantum phosphor and the green quantum phosphor to generate red light and green light, the red light and the green light are mixed with the blue light, and the display effect of the display device is poor.

Content of application

The application mainly aims to provide a color film substrate, and aims to improve the display effect of a display device.

In order to achieve the above object, the color filter substrate provided in the present application includes:

the LED lamp comprises a substrate, wherein a driving circuit is arranged on the substrate, a plurality of LED lamp beads are arranged on the driving circuit, and a plurality of sub-pixels are formed by the plurality of LED lamp beads;

the light resistance layer and the substrate are arranged in a laminated mode and cover the driving circuit, an accommodating groove is formed in the light resistance layer corresponding to each sub-pixel, and the light resistance layer is made of opaque materials; and

and the optical filters are covered on the notches of the accommodating grooves.

In an embodiment of the present application, the plurality of sub-pixels includes: a plurality of red sub-pixels, a plurality of green sub-pixels and a plurality of blue sub-pixels;

the plurality of optical filters comprise a plurality of red optical filters, a plurality of green optical filters and a plurality of blue optical filters, the red optical filters cover the notches of the accommodating grooves corresponding to the red sub-pixels, the green optical filters cover the notches of the accommodating grooves corresponding to the green sub-pixels, and the blue optical filters cover the notches of the accommodating grooves corresponding to the blue sub-pixels.

In an embodiment of the present application, an inner wall surface of each accommodating groove is covered with a reflective film.

In an embodiment of the present application, the cross-sectional area of the accommodating groove gradually increases from a surface of the photoresist layer adjacent to the substrate to another surface of the photoresist layer away from the substrate.

In an embodiment of the application, the color filter substrate further includes a sealing substrate disposed on a side of the photoresist layer opposite to the substrate, and the sealing substrate covers the notches of the plurality of accommodating grooves.

In an embodiment of the application, the color film substrate further includes a plurality of blue LED chips, a plurality of red quantum phosphor glue layers, a plurality of green quantum phosphor glue layers, and a plurality of transparent glue layers, the plurality of blue LED chips are electrically connected to the driving circuit, and the blue LED chip is disposed in each of the accommodating grooves;

the red quantum phosphor glue layers, the green quantum phosphor glue layers and the transparent glue layers are respectively arranged in the corresponding accommodating grooves and cover the corresponding blue LED chips to form the red sub-pixels, the green sub-pixels and the blue sub-pixels;

the red sub-pixels, the green sub-pixels and the blue sub-pixels are all arranged on the substrate in an array mode, and any one of the red sub-pixels, the green sub-pixels and the blue sub-pixels is arranged adjacently.

The present application further provides a display panel, comprising:

a substrate on which a driving circuit is disposed, the driving circuit having a plurality of sub-pixels formed on the substrate;

the light resistance layer and the substrate are arranged in a laminated mode and cover the driving circuit, and the light resistance layer is provided with a containing groove corresponding to each sub-pixel;

the optical filters are covered on at least part of the notches of the accommodating groove; and

the polarizing plate comprises 1/4 lambda phase optical films and polarizing films which are stacked, the 1/4 lambda phase optical films are arranged on one side, away from the substrate, of the light resistance layer, and the 1/4 lambda phase optical films are arranged opposite to the light resistance layer and correspond to the notches of the accommodating grooves.

In an embodiment of the present application, the polarizing plate further includes an anti-reflection film sheet attached to a surface of the polarizing film sheet facing away from the 1/4 λ phase optical film sheet.

In an embodiment of the present application, the display panel further includes a photoresist film, and the photoresist film is attached to a surface of the anti-reflection film opposite to the polarization film;

the light resistance membrane is provided with a light filtering area, and the light filtering area corresponds to a red sub-pixel and a green sub-pixel of a plurality of sub-pixels in the color film substrate.

The application further provides a display device which comprises the color film substrate.

According to the technical scheme, the substrate is provided with the driving circuit, and the driving circuit is provided with a plurality of sub-pixels; on the basis of the driving circuit arranged on the substrate, the photoresistance layer is arranged on the substrate, an accommodating groove is arranged on the photoresistance layer corresponding to one sub-pixel, and the photoresistance layer is made of opaque materials. When the driving circuit transmits the pixel signal to the corresponding sub-pixel, the light resistance layer has a blocking effect on the propagation of the light after the corresponding sub-pixel generates the light beam, so that the light beams in the adjacent accommodating grooves are prevented from propagating through the light resistance layer, and the display effect is improved. On the other hand, the optical filter is arranged at least part of the accommodating groove of the light resistance layer, so that part of blue light generated by filtering the optical filter is used for improving the display effect of the display device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a color film substrate according to an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of the color film substrate at the dashed frame in fig. 1;

fig. 3 is a schematic structural diagram of a second embodiment of the color film substrate in fig. 2;

fig. 4 is a schematic structural diagram of a third embodiment of the color filter substrate in fig. 2.

The reference numbers illustrate:

the implementation, functional features and advantages of the present application will be further explained with reference to the accompanying drawings in conjunction with the embodiments.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The application provides a color film substrate. Specifically, referring to fig. 1, a schematic structural diagram of a color film substrate according to an embodiment of the present application is shown; fig. 2 is a schematic cross-sectional view of the color film substrate at the dashed frame in fig. 1; fig. 3 is a schematic structural diagram of a color filter substrate in fig. 2 according to a second embodiment; fig. 4 is a schematic structural diagram of a third embodiment of the color filter substrate in fig. 2.

In this embodiment, as shown in fig. 1 and in combination with fig. 2 and 3, the color filter substrate includes: a substrate 11, a photoresist layer 14 and a plurality of filters 15. A driving circuit 12 is arranged on the substrate 11, a plurality of LED lamp beads are arranged on the driving circuit 12, and the plurality of LED lamp beads form a plurality of sub-pixels 13; the photoresist layer 14 and the substrate 11 are stacked and cover the driving circuit 12, the photoresist layer 14 is provided with a containing groove 141 corresponding to each sub-pixel 13, and the photoresist layer 14 is made of opaque material; the plurality of filters 15 cover the notches of the plurality of receiving grooves 141.

It can be understood that the color filter substrate is a sub-component of the display device, the display device includes a circuit board and a micro control unit disposed on the circuit board, and the circuit board transmits the pixel signal to the plurality of sub-pixels 13 through the driving circuit 12, so that the regions corresponding to the sub-pixels 13 emit light. The sub-pixels 13 include a red sub-pixel 131, a green sub-pixel 132, and a blue sub-pixel 133; the red sub-pixel 131 is provided with a blue LED chip 134 in the accommodating groove 141 correspondingly, and is filled with a red quantum fluorescent powder glue layer; the green sub-pixel 132 is correspondingly provided with a blue LED chip 134 in the accommodating groove 141 and is filled with a green quantum fluorescent powder glue layer; the blue sub-pixel 133 is provided with a blue LED chip 134 in the accommodation groove 141, and is filled with a transparent photoresist.

Based on the above, when the red and

green sub-pixels

131 and 132 generate red and green light in their corresponding regions, the blue light is mixed with the red and green light due to the blue light of the blue LED chip 134. The color filter 15 is disposed in the receiving groove 141 of the red sub-pixel 131 and the green sub-pixel 132, and can filter blue light to reduce the influence of the blue light on the display effect. The transparent photoresist or the blue photoresist may be disposed in the receiving groove 141 corresponding to the blue sub-pixel 133.

In the present embodiment, by providing the driving circuit 12 on the substrate 11, the driving circuit 12 has a plurality of sub-pixels 13; on the basis of the driving circuit 12 arranged on the substrate 11, the photoresist layer 14 is arranged on the substrate 11, an accommodating groove 141 is arranged on the photoresist layer 14 corresponding to one sub-pixel 13, and the photoresist layer 14 is made of opaque material; the photoresist layer 14 is made of a material that blocks light from passing through, so as to prevent light in the regions corresponding to the sub-pixels 13 from passing through the photoresist layer 14, thereby reducing interference. When the driving circuit 12 transmits the pixel signal to the corresponding sub-pixel 13, and the corresponding sub-pixel 13 generates the light beam, the photoresist layer 14 has a blocking effect on the propagation of the light beam, so as to prevent the light beam in the adjacent accommodating groove 141 from propagating through the photoresist layer 14, thereby improving the display effect. On the other hand, the optical filter 15 is disposed at least a portion of the receiving groove 141 of the photoresist layer 14, so as to filter a portion of the blue light generated by the optical filter 15, thereby improving the display effect of the display device.

Alternatively, the substrate 11 may be glass or a flexible substrate 11.

Alternatively, the drive circuit 12 may include a multilayer semiconductor and a metal member connecting the multilayer semiconductor.

Alternatively, the drive circuit 12 may include a single-layer semiconductor and a metal member connecting the single-layer semiconductor.

Optionally, the photoresist layer 14 is made of plastic.

Optionally, the photoresist layer 14 is a plastic material, and ink may be coated on the plastic material to isolate light from propagating.

In practical applications of the present embodiment, as shown in fig. 2 and fig. 3, the plurality of sub-pixels 13 includes a plurality of blue sub-pixels 133, a plurality of red sub-pixels 131, and a plurality of green sub-pixels 132, wherein one blue sub-pixel 133 is disposed adjacent to the red sub-pixels 131 and the green sub-pixels 132. That is, one blue subpixel 133 and at least one red subpixel 131 and at least one green subpixel 132 can constitute a unit displaying one image.

As shown in fig. 3, when each of the accommodating grooves 141 is provided with a filter 15, the transparent filter 15 may be disposed in the notch of the accommodating groove 141 corresponding to the blue sub-pixel 133, and the filters 15 for filtering blue light are disposed in the notches of the accommodating grooves 141 corresponding to the red sub-pixel 131 and the green sub-pixel 132; that is, the red sub-pixel 131 and the green sub-pixel 132 are regions where blue light is not required to pass through, and the filter 15 is disposed to reduce the passage of blue light, thereby improving the display effect of the display screen.

In practical application, the optical filter 15 can be a plastic sheet with any color, and can be replaced by plastic sheets with other colors according to actual requirements, and specific colors are not limited on the premise of ensuring the display effect of the display screen.

Optionally, the accommodating groove 141 corresponding to the red sub-pixel 131 is provided with a red color filter 15; the green color filter 15 is disposed in the receiving groove 141 corresponding to the green sub-pixel 132.

In an embodiment of the present application, as shown in fig. 3, the plurality of sub-pixels 13 includes: a plurality of red sub-pixels 131, a plurality of green sub-pixels 132, and a plurality of blue sub-pixels 133;

the plurality of filters 15 include a plurality of red filters 151, a plurality of green filters 152 and a plurality of blue filters 153, the red filters 151 cover the notches of the receiving grooves 141 corresponding to the red sub-pixels 131, the green filters 152 cover the notches of the receiving grooves 141 corresponding to the green sub-pixels 132, and the blue filters 153 cover the notches of the receiving grooves 141 corresponding to the blue sub-pixels 133.

In the present embodiment, the red filter 151 is covered on the notch of the receiving groove 141 corresponding to the red sub-pixel 131, and the green filter 152 is covered on the notch of the receiving groove 141 corresponding to the green sub-pixel 132, so as to filter the blue light generated in the regions corresponding to the red sub-pixel 131 and the green sub-pixel 132, thereby improving the display effect. On the other hand, the blue filter 153 covers the notch of the receiving groove 141 corresponding to the blue sub-pixel 133, and the blue filter 153 filters the light beam generated by the blue sub-pixel 133, so that the light transmitted by the region of the blue sub-pixel 133 is only blue, thereby further improving the display effect.

In an embodiment of the present application, as shown in fig. 3 and 4, an inner wall surface of each accommodating groove 141 is covered with a reflective film 16.

In the present embodiment, by providing the driving circuit 12 on the substrate 11, a plurality of sub-pixels 13 are formed on the driving circuit 12; on the basis of arranging the driving circuit 12 on the substrate 11, arranging the light resistance layer 14 on the substrate 11, arranging one accommodating groove 141 corresponding to one sub-pixel 13 on the light resistance layer 14, and covering the inner wall surface of each accommodating groove 141 with a reflective film 16; that is to say, when the driving circuit 12 transmits the pixel signal to the corresponding sub-pixel 13, and the corresponding sub-pixel 13 generates the light beam, the light reflecting film 16 can reduce the light beam absorbed by the light blocking layer 14, and the light beam is reflected by the light reflecting film 16 and emitted from the notch of the corresponding accommodating groove 141, so as to realize the convergence of the light beam, thereby improving the brightness of the single sub-pixel 13, improving the light beam penetration capability, and improving the anti-interference capability and the display effect of the display screen.

Alternatively, the reflective film 16 is a metal film, that is, a metal layer is formed on the inner wall surface of the accommodating groove 141 to form the inner wall surface of the accommodating groove 141 with mirror reflection.

In an embodiment of the present application, the cross-sectional area of the accommodating groove 141 gradually increases from one surface of the photoresist layer 14 adjacent to the substrate to the other surface of the photoresist layer 14 away from the substrate 11. That is, the notch of the receiving groove 141 is flared.

In the embodiment, the opening of the accommodating groove 141 is flared, and when the region corresponding to the sub-pixel 13 emits light, the light beam irradiates the sidewall of the accommodating groove 141, and the sidewall can directly reflect the light beam to the region of the opening.

In an embodiment of the present application, referring to fig. 2, fig. 3 and fig. 4, the color filter substrate further includes a sealing substrate 17 disposed on a side of the photoresist layer 14 opposite to the substrate 11, and the sealing substrate 17 covers the notches of the plurality of accommodating grooves 141. That is to say, the sealing substrate 17 is used to seal the plurality of accommodating grooves 141, so as to prevent water and oxygen from entering the accommodating grooves 141, reduce the influence of water and oxygen on the sub-pixels 13, and improve the working stability of the color film substrate.

Alternatively, the sealing substrate 17 may be glass or a flexible substrate.

In an embodiment of the present application, in combination with the color film substrate shown in fig. 2, 3, and 4, the color film substrate further includes a plurality of blue LED chips 134, a plurality of red quantum phosphor glue layers (not shown), a plurality of green quantum phosphor glue layers (not shown), and a plurality of transparent glue layers, the plurality of blue LED chips 134 are electrically connected to the driving circuit 12, and each of the accommodating grooves 141 is provided therein with a blue LED chip 134.

The red quantum phosphor glue layers, the green quantum phosphor glue layers and the transparent glue layers are respectively arranged in the corresponding accommodating grooves 141 and cover the corresponding blue LED chips 134 to form a red sub-pixel 131, a green sub-pixel 132 and a blue sub-pixel 133; the red sub-pixels 131, the green sub-pixels 132 and the blue sub-pixels 133 are arranged on the substrate 11 in an array, and any one of the red sub-pixels 131 is adjacent to the green sub-pixels 132 and the blue sub-pixels 133.

Optionally, the sum of the numbers of the red quantum phosphor glue layer, the green quantum phosphor glue layer and the transparent glue layer is equal to the number of the blue LED chips 134.

Optionally, one or more blue LED chips 134 are disposed in each accommodating groove 141.

Optionally, after the red quantum phosphor glue may be mixed into the glue, the glue mixed with the red quantum phosphor is filled into the accommodating groove 141 to form a red quantum phosphor glue layer, so as to achieve the purpose that the red quantum phosphor glue layer surrounds the blue LED chip 134.

Optionally, after the green quantum phosphor glue may be mixed into the glue, the glue mixed with the green quantum phosphor is filled into the accommodating groove 141 to form a red-green quantum phosphor glue layer, so as to achieve the purpose that the green quantum phosphor glue layer surrounds the blue LED chip 134.

In one embodiment of the present application, the ratio of the number of the blue sub-pixel 133, the red sub-pixel 131, and the green sub-pixel 132 is 1: 1: 1.

that is, the plurality of blue LED chips 134 are equally divided into three. One part of the blue LED chip 134 is disposed in a part of the accommodating groove 141, and is filled with a red quantum phosphor glue layer to form a red sub-pixel 131; the other blue LED chip 134 is arranged in the other part of the accommodating groove 141 and is filled with a green quantum fluorescent powder adhesive layer to form a green sub-pixel 132; another blue LED chip 134 is disposed in another portion of the accommodating groove 141, and optionally filled with a transparent adhesive layer to form the blue sub-pixel 133.

In the present embodiment, the blue LED chip 134 is transferred onto the substrate 11 in a transfer manner, and is electrically connected to the driving circuit 12; each blue LED chip 134 is located on the bottom wall of the accommodating groove 141, a red quantum phosphor glue layer is filled in the region corresponding to the red sub-pixel 131, a green quantum phosphor glue layer is filled in the region corresponding to the green sub-pixel 132, and a transparent photoresist can be coated in the accommodating groove 141 corresponding to the blue sub-pixel 133, so as to ensure the working stability of the blue LED chip 134.

The present application further provides a display panel, which is shown in fig. 2, fig. 3 and fig. 4, and includes a polarizing plate 2 and a color film substrate, and the specific structure of the color film substrate refers to the above embodiments. The polarizing plate 2 includes an 1/4 λ phase optical film 21 and a polarizing film 22 stacked together, the 1/4 λ phase optical film 21 is disposed on a side of the photoresist layer 14 away from the substrate 11, and the 1/4 λ phase optical film 21 is disposed opposite to the photoresist layer 14 and corresponds to the notches of the plurality of accommodating grooves 141.

In this embodiment, an 1/4 λ phase optical film 21 and a polarizing film 22 are disposed on the color filter substrate, and the 1/4 λ phase optical film 21 covers the plurality of sub-pixels 13. It can be understood that the 1/4 λ phase optical film 21 and the polarizing film 22 are disposed on the color film substrate to convert and absorb the light beam externally incident to the display panel through the 1/4 λ phase optical film 21 and the polarizing film 22, so as to reduce the influence of the external light beam on the light beam of the display device itself. Specifically, when external light beams irradiate the display panel, the light beams pass through the polarization film 22 to form linearly polarized light, and the linearly polarized light passes through the 1/4 λ phase optical film 21 to obtain left circularly polarized light and/or right circularly polarized light, wherein the left circularly polarized light and/or the right circularly polarized light can partially excite the red quantum phosphor glue layer and the green quantum phosphor glue layer to form fluorescence, so that the red light and the green light excited by the external light beams have the property of left circularly polarized light and/or right circularly polarized light; furthermore, when the red light and the green light with the property of left circularly polarized light and/or right circularly polarized light are emitted and pass through the 1/4 lambda phase optical film 21 and the polarizing film 22, an emergent light beam which forms 90 degrees with the polarization direction of the incident light beam can be generated, the polarization direction of the emergent light beam is vertical to the penetration direction of the polarizing film 22, and the light is absorbed, namely, the influence of the fluorescence generated by exciting the red quantum fluorescent powder adhesive layer and the green quantum fluorescent powder adhesive layer by the external light beam on the light of the display panel is reduced, so that the display effect of the display device is improved.

In one embodiment of the present application, the 1/4 λ phase optical film 21 is disposed opposite to the photoresist layer 14, which includes two cases, for example:

in the first case, when the sealing substrate 17 is covered on the photoresist layer 14, the 1/4 λ phase optical film 21 is attached to the side of the sealing substrate 17 facing away from the optical filter 15 and the photoresist layer 14.

In the second case, if the photoresist layer 14 does not adopt the structure of the sealing substrate 17, the 1/4 λ phase optical film 21 can be directly attached to the surface of the photoresist layer 14 away from the substrate 11 and cover the plurality of accommodating grooves 141.

It will be appreciated that the 1/4 lambda phase optical diaphragm 21 is a quarter wave plate.

It is understood that the polarizing film 22 is made of polyvinyl alcohol.

In practical application of this embodiment, after the 1/4 λ phase optical film 21 is attached to the color filter substrate, the polarizing film 22 is attached to the 1/4 λ phase optical film 21. The external light beam irradiates the display panel, the blue light in the external light beam is absorbed by the polarizing film 22 to generate linearly polarized light, the linearly polarized light passes through the 1/4 lambda phase optical film 21, and the angle between the linear polarization direction and the optical axis of the 1/4 lambda phase optical film 21 is 45 degrees, so that the linearly polarized light forms circularly polarized light. The included angle between the linearly polarized light and the optical axis of the 1/4 lambda phase optical film 21 is 45 degrees or-45 degrees, so that different circular polarizations are formed, namely left circularly polarized light and right circularly polarized light.

Assuming that left circularly polarized light is formed, the left circularly polarized blue light excites the green and red quantum dot phosphors to generate left circularly polarized green and red light, and the left circularly polarized green and red light illuminates the reflective film on the inner wall surface of the accommodating groove 141, and then, the green and red light with right circularly polarization is emitted as a mirror image, and is emitted through the 1/4 λ phase optical film 21. When the green light and the red light with right circular polarization pass through the 1/4 lambda phase optical film 21, the right circular polarized light is changed into linearly polarized light, and the linearly polarized light has 90-degree phase difference with the linearly polarized light generated by the original incidence polarization film 22. That is, the light beam horizontally polarizes the incident polarization film 22 and the 1/4 λ phase optical film 21 to form a vertically polarized emergent light beam, so that the emergent polarized light is absorbed by the polarization film 22 perpendicular to the polarization direction of the incident light, thereby avoiding affecting the display effect.

In an embodiment of the present application, as shown in fig. 2, fig. 3 and fig. 4, the polarizing plate 2 further includes an anti-reflection film 23, and the anti-reflection film 23 is attached to a surface of the polarizing film 22 opposite to the 1/4 λ phase optical film 21.

In this embodiment, the anti-reflection film 23 is attached on the polarizing film 22 to prevent external light from reflecting after the display panel is irradiated, thereby improving the display effect of the display screen.

In an embodiment of the present application, referring to fig. 4, the display panel further includes a photoresist film 3, the photoresist film 3 is attached to a surface of the anti-reflection film 23 opposite to the polarization film 22;

the photoresist film 3 is provided with a filter region 31, and the filter region 31 corresponds to a red sub-pixel 131 and a green sub-pixel 132 of the plurality of sub-pixels 13 in the color filter substrate.

It is understood that the filter region 31 may refer to a region having a color on the photoresist film 3; that is, the photoresist film 3 may include a portion of a transparent photoresist and another portion of a colored photoresist, the portion of the transparent photoresist and the another portion of the colored photoresist being integrally provided, and the another portion of the colored photoresist being formed as the light filtering region 31.

Alternatively, the colored photoresist may be at least one color. When the colored photoresist is a color, the colored photoresist may be a yellow photoresist. When the colored photoresist is of two colors, the colored photoresist may include a red portion and a green portion, the red portion corresponding to the red sub-pixel 131 and the green portion corresponding to the green sub-pixel 132. When the colored photoresist has more than three colors, the color of the photoresist film 3 can be adjusted according to the actual requirement, for example, the color can be red, yellow, green, etc.

Alternatively, a photoresist film 3 may be attached to a surface of the polarizing film 22 opposite to the 1/4 λ phase optical film 21, and an anti-reflection film 23 may be attached to a surface of the photoresist film 3 opposite to the polarizing film 22.

In an embodiment of the present application, the value of λ in the 1/4 λ phase optical film 21 is 350nm to 400 nm;

the phase optical diaphragm 21 is designed by taking blue light as a target, wherein lambda is 350-400 nm, and the phase optical diaphragm 21 is designed by adopting a delta nd-1/4 lambda phase optical diaphragm 21 and a 1/4 lambda phase optical diaphragm, wherein nx and ny are respectively two equivalent material refractive indexes which are perpendicular to each other on a vertical plane of a light beam advancing direction.

In an embodiment of the present application, the polarizing film 22 is made of polyvinyl alcohol resin.

The present application further provides a display device, which includes a color filter substrate, and a specific structure of the color filter substrate refers to the foregoing embodiments, and since the display device employs all technical solutions of all the foregoing embodiments, the display device at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated herein.

The above description is only an alternative embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which are made by the following claims and their equivalents, or which are directly or indirectly applicable to other related arts, are intended to be included within the scope of the present application.

Claims

1. A color film substrate is characterized by comprising:

2. The color filter substrate of claim 1, wherein the plurality of sub-pixels comprise a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels;

3. The color filter substrate of claim 2, wherein the cross-sectional area of the receiving groove gradually increases from a surface of the photoresist layer adjacent to the substrate to another surface of the photoresist layer away from the substrate.

4. The color filter substrate according to claim 3, wherein an inner wall surface of the accommodating groove is covered with a reflective film.

5. The color filter substrate according to claim 4, further comprising a sealing substrate disposed on a side of the photoresist layer opposite to the substrate, wherein the sealing substrate covers the notches of the plurality of receiving grooves.

6. The color film substrate of claim 2, further comprising a plurality of blue LED chips, a plurality of red quantum phosphor glue layers, a plurality of green quantum phosphor glue layers, and a plurality of transparent glue layers, wherein the plurality of blue LED chips are electrically connected to the driving circuit, and the blue LED chip is disposed in each of the accommodating grooves;

7. A display panel comprising a polarizing plate and the color film substrate according to any one of claims 1 to 6;

8. The display panel of claim 7, wherein the polarizing plate further comprises an anti-reflection film attached to a surface of the polarizing film facing away from the 1/4 λ phase optical film.

9. The display panel of claim 8, further comprising a photoresist film sheet attached to a surface of the anti-reflection film sheet opposite to the polarizing film sheet;

10. A display device comprising the color filter substrate according to any one of claims 1 to 6.