CN117794308A - Display panel, preparation method of display panel and display device - Google Patents

Abstract

The application discloses a display panel, a preparation method of the display panel and a display device, wherein the display panel comprises a substrate, an active switch layer, a pixel definition layer and a light-emitting unit, wherein the pixel definition layer is arranged on the active switch layer and corresponds to a non-opening area of the display panel; the light-emitting unit is arranged on the active switch layer and corresponds to the opening area of the display panel; the display panel further comprises a light filtering layer, the light filtering layer is arranged on one side, far away from the substrate, of the pixel definition layer and the light emitting unit, the light filtering layer comprises a black matrix unit and a light filtering unit, the black matrix unit corresponds to the pixel definition layer one by one, the light filtering unit corresponds to the light emitting unit one by one, the light filtering unit comprises a light filtering part and a spacer part which are stacked, the spacer part is positioned on one side, facing the substrate, of the light filtering part, the material of the light filtering part comprises a color resistance material, and the refractive index of the light filtering part is smaller than that of the spacer part. By the design, the reflection of the display panel to external light is reduced, and the contrast of the display panel is improved.

Description

Display panel, preparation method of display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device.

Background

With the rapid development of display technology, in an OLED display panel, the polarizer can effectively reduce the reflectivity of the display panel under strong light, but the polarizer can lose light emission close to 58%. And the polaroid has larger thickness and crisp material, and is unfavorable for the development of dynamic bending products. It is common practice to use a filter layer instead of a polarizer, which is attributed to the POL-less technique.

However, due to the nature of the OLED display panel and the poor light blocking effect of the light filtering layer, the OLED display panel has a high reflection effect on ambient light, so how to prevent external natural light from entering the display panel and irradiating the anode of the light emitting unit to cause light reflection becomes a technical problem to be solved urgently.

Disclosure of Invention

The purpose of the application is to provide a display panel, a preparation method of the display panel and a display device, so that the reflection of the display panel to external light is reduced, and the contrast ratio of the display panel is improved.

The application discloses a display panel, which comprises a substrate, an active switch layer, a pixel definition layer and a light-emitting unit, wherein the active switch layer is arranged on the substrate, and the pixel definition layer is arranged on the active switch layer and corresponds to a non-opening area of the display panel; the light-emitting unit is arranged on the active switch layer and corresponds to the opening area of the display panel; the display panel further comprises a light filtering layer, the light filtering layer is arranged on one side, far away from the substrate, of the pixel definition layer and the light emitting unit, the light filtering layer comprises a black matrix unit and a light filtering unit, the black matrix unit corresponds to the pixel definition layer one by one, the light filtering unit corresponds to the light emitting unit one by one, the light filtering unit comprises a light filtering part and a spacer part, the light filtering part is stacked, the spacer part is arranged on one side, facing the substrate, of the light filtering part, the material of the light filtering part comprises a color resistance material, and the refractive index of the light filtering part is smaller than that of the spacer part.

Optionally, the material of the spacer portion includes a color blocking material, and the color blocking material includes red, green, blue, and other colors of color blocking.

Optionally, the material of the spacer portion includes a transparent anti-reflective material, and the transparent anti-reflective material includes one or more of a transparent polyimide organic material, silicon monoxide, silicon nitride, magnesium fluoride, titanium dioxide, and aluminum oxide.

Optionally, a spacer groove is concavely formed in the direction of the substrate on one side of the spacer part close to the light filtering part, a light filtering protrusion is convexly formed in the direction of the substrate on one side of the light filtering part close to the spacer part, and the shape of the light filtering protrusion is matched with the shape of the spacer groove;

taking the direction of the substrate facing the light emitting unit as a first direction, wherein the minimum thickness of the spacer part along the first direction is H1, the maximum thickness of the spacer part along the first direction is H2, and the thickness of the black matrix unit along the first direction is H3, wherein H1 is greater than 1/4 of H3, and H1 is less than 1/2 of H3; h2 is less than 3/4 of H3 and H2 is greater than 1/2 of H3.

Optionally, a side of the filtering portion facing away from the spacer portion is concave toward the substrate to form a filtering groove.

Optionally, the display panel further includes a light absorbing unit, where the light absorbing units are in one-to-one correspondence with the black matrix units, and the black matrix units are stacked on a side of the light absorbing unit facing away from the substrate;

the orthographic projection of the light absorbing unit on the substrate covers the orthographic projection of the black matrix unit on the substrate, and the orthographic projection area of the light absorbing unit on the substrate is larger than the orthographic projection area of the black matrix unit on the substrate;

wherein, the light absorbing unit may be used for absorbing light.

Optionally, the light absorbing unit includes a transparent electrode and an electrochromic layer, where the transparent electrode is located between the electrochromic layer and the black matrix unit, and the material of the electrochromic layer includes an electrochromic material, and the transparent electrode drives the transmittance of the electrochromic layer to change.

Optionally, the shape of the spacer groove is inverted trapezoid, the spacer groove comprises a spacer bottom surface and a spacer side surface, the spacer side surface is connected with the edge of the spacer bottom surface, and an included angle between the spacer side surface and the spacer bottom surface is an obtuse angle; the light filtering bulge is in an inverted trapezoid shape, the light filtering bulge comprises a light filtering top surface and a light filtering side surface, the light filtering side surface is connected with the edge of the light filtering top surface, and an included angle between the light filtering side surface and the light filtering top surface is an obtuse angle;

the filtering top surface is attached to the bottom surface of the isolation pad, and the filtering side surface is attached to the side surface of the isolation pad.

The application also discloses a preparation method of the display panel, which is used for preparing the display panel and comprises the following steps:

preparing the active switching layer on the substrate;

preparing the pixel defining layer and the light emitting unit on the active switching layer;

preparing the black matrix unit on the pixel definition layer;

preparing the spacer portion on the light emitting unit;

preparing the light filtering part on the spacer part to form the light filtering layer;

wherein the pixel definition layer corresponds to the non-opening region; the light emitting unit corresponds to the opening area.

The application also discloses a display device, including drive circuit and display panel, drive circuit with display panel connects.

Compared with the scheme that the existing filter layer only comprises a single-layer filter unit and a black matrix unit, the spacer part is arranged below the filter part, the refractive index of the filter part is smaller than that of the spacer part, the height of the filter part is raised, and after external light passes through the filter part, the refracted light is easily absorbed by the black matrix unit beside; secondly, because the refractive index of the light filtering part is smaller than that of the isolation pad part, light can be secondarily refracted when passing through the junction between the light filtering part and the isolation pad part, and the light which has emitted refraction is refracted towards the black matrix unit again, so that the quantity of light which is refracted onto the black matrix unit when the external light passes through the light filtering unit is further improved, the possibility of reflection when the external light passes through the light filtering layer and irradiates the metal layer on the light emitting unit is reduced, the reflection of natural light is reduced, and the contrast of the display panel is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present application;

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

fig. 3 is a partially enlarged schematic view of a display panel according to a first embodiment of the present application;

FIG. 4 is a schematic view of an inverted trapezoidal spacer groove according to a first embodiment of the present application;

FIG. 5 is a schematic view of a filtering portion of a first embodiment of the present application;

FIG. 6 is a schematic view of a light absorbing unit according to a first embodiment of the present application;

FIG. 7 is a schematic view of a light absorption unit with controllable light transmittance according to a first embodiment of the present application;

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

FIG. 9 is a schematic diagram of a method for manufacturing a display panel according to an embodiment of the present application;

fig. 10 is a schematic illustration of a display panel manufacturing process according to an embodiment of the present application.

10, a display device; 20. a driving circuit; 30. a display panel; 100. a substrate; 110. an active switching layer; 120. a pixel definition layer; 130. a light emitting unit; 140. a thin film encapsulation layer; 150. a buffer layer; 200. a filter layer; 300. a black matrix unit; 400. a light filtering unit; 500. a light filtering portion; 510. a light filtering groove; 520. a light filtering protrusion; 521. a filter top surface; 522. a filtering side; 600. a spacer portion; 610. a spacer groove; 611. the bottom surface of the spacer; 612. the side surface of the isolation pad; 700. a light absorbing unit; 710. a transparent electrode; 720. an electrochromic layer.

Detailed Description

It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.

In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The present application is described in detail below with reference to the attached drawings and alternative embodiments.

Fig. 1 is a schematic diagram of a display device according to an embodiment of the present application, and as shown in fig. 1, the present application discloses a display device 10, including a driving circuit 20 and a display panel 30, where the driving circuit 20 is connected to the display panel 30, and drives the display panel 30 to display a picture.

The display panel 30 is an OLED (Organic Light-Emitting Diode) display panel 30.

The application also discloses a display panel 30, the display panel 30 may be used in the display device 10 described above, and for the display panel 30, the application provides the following designs, and the following embodiments are specifically described:

example 1:

fig. 2 is a schematic view of a display panel according to a first embodiment of the present application, as shown in fig. 2, in which a direction indicated by an arrow in the figure is a transmission direction of a part of external natural light, the present application discloses a display panel 30, the display panel 30 includes a substrate 100, an active switching layer 110, a pixel defining layer 120 and a light emitting unit 130, the active switching layer 110 is disposed on the substrate 100, the pixel defining layer 120 is disposed on the active switching layer 110 and is disposed corresponding to a non-opening area of the display panel 30; the light emitting unit 130 is disposed on the active switch layer 110 and corresponds to the opening area of the display panel 30.

The display panel 30 further includes a filter layer 200, the filter layer 200 is disposed on a side of the pixel defining layer 120 and the light emitting unit 130 away from the substrate 100, the filter layer 200 includes a black matrix unit 300 and a filter unit 400, the black matrix unit 300 is in one-to-one correspondence with the pixel defining layer 120, the filter unit 400 is in one-to-one correspondence with the light emitting unit 130, that is, the black matrix unit 300 is located in a vertical direction of the pixel defining layer 120 and corresponds to a non-opening area of the display panel 30, and the filter unit 400 is located in a vertical direction of the light emitting unit 130 and corresponds to an opening area of the display panel 30.

The light filtering unit 400 includes a light filtering portion 500 and a spacer portion 600 stacked, the spacer portion 600 is located on a side of the light filtering portion 500 facing the substrate 100, the material of the light filtering portion 500 includes a color blocking material, the color blocking material includes red, green, blue, and other color blocking materials, and the color of the light filtering portion 500 corresponds to the corresponding light emitting unit 130.

The refractive index of the light filtering portion 500 is smaller than that of the spacer portion 600, and the light filtering unit 400 is used for refracting external light toward the adjacent black matrix unit 300.

Compared with the prior art that the filter layer 200 only has the single-layer filter unit 400 and the black matrix unit 300, the spacer portion 600 is arranged below the filter portion 500, and the refractive index of the filter portion 500 is smaller than that of the spacer portion 600, so that the height of the filter portion 500 is raised, and after the external light passes through the filter portion 500, the refracted light is easily absorbed by the side black matrix unit 300.

Secondly, since the refractive index of the light filtering portion 500 is smaller than that of the spacer portion 600, light can be secondarily refracted when passing through the boundary between the light filtering portion 500 and the spacer portion 600, so that light having emitted refraction is refracted again towards the black matrix unit 300, thereby further improving the quantity of light refracted onto the black matrix unit 300 when external light passes through the light filtering unit 400, reducing the possibility of reflection when the external light passes through the light filtering layer 200 and irradiates onto the metal layer on the light emitting unit 130, reducing reflection of natural light by the display panel 30, and improving contrast of the display panel 30.

Wherein the thickness of the spacer portion 600 may be aboutTo->The display panel 30 further includes a thin film encapsulation layer 140 and a buffer layer 150, wherein the thin film encapsulation layer 140 is disposed on the pixel definition layer 120 and the light emitting unit 130, and plays a role of encapsulation; the buffer layer 150 is disposed on a side of the thin film encapsulation layer 140 facing away from the substrate 100, and the buffer layer 150 is used to prevent moisture from entering the light emitting unit 130 in the display panel 30. The buffer layer 150 includes an inorganic film of silicon nitride (SiNx), and the buffer layer 150 may be a single layer film or a multi-layer film, and the thickness of the buffer layer 150 may be about +>To about->

Further, the spacer portion 600 may also be made of a color block material, so in this embodiment, the filter unit 400 is equivalent to two layers of color block materials having different refractive indexes, specifically, the material of the spacer portion 600 includes a color block material, the color block material includes color blocks of colors such as red, green and blue, and the material of the color block includes a resin, a photoinitiator, a pigment dispersing agent, a solvent, an additive, and the like, and the refractive indexes of the spacer portion 600 and the filter portion 500 may be increased by increasing the ratio of the resin to the pigment, so that the refractive indexes are different. Since one filter unit 400 has two layers of color resistances with the same color, the color display effect of the display panel 30 can be improved compared with the filter unit 400 having only one layer of color resistance material.

Fig. 3 is a schematic enlarged view of a portion of a display panel according to a first embodiment of the present application, as shown in fig. 3, in which a direction indicated by an arrow in the drawing is a first direction, in order to further improve a refraction effect of the optical filtering unit 400 on the outside, in this application, a side of the spacer portion 600, which is close to the optical filtering portion 500, is concaved inwards towards the direction of the substrate 100 to form a spacer groove 610, a side of the optical filtering portion 500, which is close to the spacer portion 600, is concavely protruded towards the direction of the substrate 100 to form an optical filtering protrusion 520, and a shape of the optical filtering protrusion 520 is matched with a shape of the spacer groove 610.

And, with the direction of the substrate 100 toward the light emitting unit 130 as a first direction, the bottom surface of the spacer portion 600 is on the same horizontal plane as the bottom surface of the black matrix unit 300, the bottom surface of the light filtering portion 500 is higher than the bottom surface of the black matrix unit 300, the top surface of the light filtering portion 500 is higher than the top surface of the black matrix unit 300, the minimum thickness of the spacer portion 600 along the first direction is H1, the maximum thickness of the spacer portion 600 along the first direction is H2, and the thickness of the black matrix unit 300 along the first direction is H3. Wherein H1 is greater than 1/4 of H3 and H1 is less than 1/2 of H3; h2 is less than 3/4 of H3 and H2 is greater than 1/2 of H3.

Therefore, when the external light passes through the filter portion 500, enough light can be refracted onto the black matrix unit 300, and even if some light passes through the filter portion 500, the light can be refracted onto the lower half of the black matrix unit 300 when passing through the spacer portion 600, so that the amount of light entering the display panel 30 and reaching the light emitting unit 130 is reduced, and the reflection of the external light by the display panel 30 is better prevented.

The shape of the spacer groove 610 and the shape of the filtering protrusion 520 may be circular arc or inverted trapezoid, and in this application, the shape of the spacer groove 610 and the shape of the filtering protrusion 520 are both inverted trapezoids, which is specifically described below.

Fig. 4 is a schematic diagram of an inverted trapezoidal spacer groove according to the first embodiment of the present application, as shown in fig. 4, in order to make the light entering the display panel 30 from the outside be absorbed by the black matrix unit 300 as much as possible, the shape of the spacer groove 610 of the present application is inverted trapezoidal, the spacer groove 610 includes a spacer bottom surface 611 and a spacer side surface 612, the spacer side surface 612 is connected with the edge of the spacer bottom surface 611, and an included angle between the spacer side surface 612 and the spacer bottom surface 611 is an obtuse angle; the shape of the filtering protrusion 520 is an inverted trapezoid, the filtering protrusion 520 includes a filtering top surface 521 and a filtering side surface 522, the filtering side surface 522 is connected with an edge of the filtering top surface 521, and an included angle between the filtering side surface 522 and the filtering top surface 521 is an obtuse angle; and the filter top 521 is attached to the spacer bottom 611, and the filter side 522 is attached to the spacer side 612.

Because the included angle between the filtering side surface 522 and the filtering top surface 521 and the included angle between the spacer side surface 612 and the spacer bottom surface 611 are obtuse angles, the refraction angle of the external light rays when the external light rays irradiate the filtering side surface 522 and the spacer side surface 612 is larger, and the refraction effect of the filtering unit 400 on the light rays is better.

Further, a groove may also be provided on the upper surface of the filter portion 500, as shown in fig. 5, where a side of the filter portion 500 facing away from the spacer portion 600 is concave toward the substrate 100 to form a filter groove 510.

The dual refraction effect is achieved by the combination of the filter protrusion 520 and the spacer groove 610, that is, the light is refracted by the filter groove 510 for the first time when entering the filter portion 500, and then refracted by the spacer groove 610 for the second time when passing between the filter protrusion 520 and the spacer groove 610.

In addition, the radian of the filtering groove 510 is smaller than that of the spacer groove, so that the external light is refracted at a large angle when passing through the filtering groove 510, and the external light can be refracted on the black matrix units 300 at two sides as much as possible. The refraction effect of the filtering unit 400 on the light is further improved.

The shape of the filtering groove 510 is the same as that of the spacer groove 610, and may be arc-shaped or inverted trapezoid-shaped.

Fig. 6 is a schematic diagram of a light absorbing unit according to the first embodiment of the present application, as shown in fig. 6, the light absorbing unit 700 is further disposed under the black matrix unit 300, and in particular, the display panel 30 further includes the light absorbing units 700, the light absorbing units 700 are in one-to-one correspondence with the black matrix units 300, and the black matrix units 300 are stacked on a side of the light absorbing units 700 facing away from the substrate 100, that is, one light absorbing unit 700 is disposed under each black matrix unit 300.

The front projection of the light absorbing unit 700 on the substrate 100 covers the front projection of the black matrix unit 300 on the substrate 100, and the front projection area of the light absorbing unit 700 on the substrate 100 is larger than the front projection area of the black matrix unit 300 on the substrate 100; wherein the light absorbing unit 700 may be used to absorb light.

The material of the black matrix unit 300 is composed of black resist, the material of the light absorbing unit 700 is also composed of black resist, which is equivalent to providing two layers of black resist, and since the area of the light absorbing unit 700 below is larger than that of the black matrix unit 300, the refracted light is absorbed at the step surface formed between the light absorbing unit 700 and the black matrix unit 300, thereby greatly improving the effect of preventing the display panel 30 from reflecting external light.

Of course, since the light absorbing unit 700 also causes the aperture ratio of the display panel 30 to be reduced, the present application further improves the light absorbing unit 700, and the light absorbing unit 700 is configured with a light transmittance controllable structure, as follows.

Fig. 7 is a schematic view of controllable light transmittance of a light absorbing unit according to the first embodiment of the present application, as shown in fig. 7, the light absorbing unit 700 includes a transparent electrode 710 and an electrochromic layer 720 stacked, the transparent electrode 710 is located between the electrochromic layer 720 and the black matrix unit 300, the material of the electrochromic layer 720 includes an electrochromic material, and the transparent electrode 710 drives the light transmittance of the electrochromic layer 720 to change.

Of course, in the first direction, the transparent electrode 710 is below, and the electrochromic layer 720 is above. The transparent electrode 710 is preferably disposed between the electrochromic layer 720 and the black matrix unit 300, that is, the transparent electrode 710 is disposed above, and the electrochromic layer 720 is disposed below, so that when the light absorbing unit 700 is in a light absorbing state, the transmittance of the electrochromic layer 720 is low, and no light passing through the transparent electrode 710 and entering the display panel 30 occurs due to the fact that the electrochromic layer 720 is disposed below.

In addition, compared with the scheme that the light absorbing unit 700 is directly made of black resistance material, the light transmittance of the light absorbing unit 700 is controllable by adopting the combination of the transparent electrode 710 and the electrochromic layer 720, so that when the display panel 30 displays a picture, or a bright-state area is displayed in the picture, the corresponding light transmittance of the light absorbing unit 700 is controlled to be increased, and the aperture ratio of the display panel 30 is not affected; when the display panel 30 does not display a picture, or when a dark state area is displayed in the picture, the light transmittance of the corresponding light absorbing unit 700 is controlled to be reduced, so that the light reflection preventing effect of the display panel 30 is not affected.

Example 2:

fig. 8 is a schematic view of a display panel 30 according to a second embodiment of the present application, and as shown in fig. 8, unlike the first embodiment, the material of the spacer portion 600 includes a transparent anti-reflective material, and the transparent anti-reflective material includes one or more of a transparent polyimide organic material, silicon monoxide, silicon nitride, magnesium fluoride, titanium dioxide, and aluminum oxide.

Compared to the first embodiment, the spacer portion 600 of the present embodiment is made of a transparent anti-reflection material, and has lower production cost, and does not need to modulate two color resist materials of the same color with different refractive indexes.

The application also discloses a preparation method of the display panel 30, which is used for preparing the display panel 30 according to the above embodiment, and is specifically as follows.

Fig. 9 is a schematic diagram of a method for manufacturing a display panel according to an embodiment of the present application, and fig. 10 is a schematic diagram of a process for manufacturing a display panel according to an embodiment of the present application, as shown in fig. 9 to 10, the present application discloses a method for manufacturing a display panel 30, including the steps of:

s1: preparing the active switching layer on the substrate;

s2: preparing the pixel defining layer and the light emitting unit on the active switching layer;

s3: preparing the black matrix unit on the pixel definition layer;

s4: preparing the spacer portion on the light emitting unit;

s5: preparing the light filtering part on the spacer part to form the light filtering layer;

wherein the pixel defining layer 120 corresponds to the non-opening region; the light emitting unit 130 corresponds to the opening area.

By disposing the spacer portion 600 under the light filtering portion 500 and making the refractive index of the light filtering portion 500 smaller than that of the spacer portion 600, the height of the light filtering portion 500 is raised, so that the refracted light is easily absorbed by the side black matrix unit 300 after the external light passes through the light filtering portion 500; secondly, since the refractive index of the light filtering portion 500 is smaller than that of the spacer portion 600, light can be secondarily refracted when passing through the boundary between the light filtering portion 500 and the spacer portion 600, so that light which has been emitted and refracted is refracted towards the black matrix unit 300 again, thereby further improving the quantity of light which is refracted onto the black matrix unit 300 when external light passes through the light filtering unit 400, reducing the possibility of reflection when the external light passes through the light filtering layer 200 and irradiates onto the metal layer on the light emitting unit 130, reducing reflection of natural light by the display panel 30, and improving contrast of the display panel 30.

The step S2: preparing the pixel defining layer and the light emitting unit on the active switching layer; the method also comprises the steps of:

s21: preparing the thin film encapsulation layer on the pixel definition layer and the light emitting unit;

s22: and preparing a buffer layer on the film packaging layer.

The film encapsulation layer 140 plays a role of encapsulation, and the buffer layer 150 serves to prevent moisture from entering the light emitting unit 130 within the display panel 30.

Taking the material of the spacer portion 600 as red, green, blue, etc. color resist materials as an example, the material of the spacer portion 600 may be coated or deposited on the surfaces of the buffer layer 150 and the black matrix unit 300 when the spacer portion 600 is prepared; subsequently, a photoresist layer is formed on the spacer portion 600; the photoresist layer may include a fluorinated acrylic monomer, a fluorinated alkyl monomer material, or a fluorinated silane accelerator having hydrophobicity. The photoresist layer may be a negative photoresist layer or a positive photoresist layer; subsequently, a mask is provided on the photoresist layer, and the photoresist layer is irradiated with light passing through the mask, which may be, for example, a multi-tone (half tone) mask in which the amount of transmitted light is adjusted to be large at the edge region and small at the middle region in the light-transmitting portion; and then, performing an exposure and development process.

The shape pattern of the spacer grooves 610 of the spacer portion 600 may also be formed by transfer printing. The spacer 600 is coated with a solution, then pre-cured at low temperature, and the spacer grooves 610 are patterned by a patterned roller, and then the spacer 600 material is removed above the black matrix unit 300 in the unwanted areas by an exposure and development process.

And in said step S3: preparing the black matrix unit 300 on the pixel definition layer 120; the method also comprises the following steps:

s23: the light absorbing unit is disposed on the pixel defining layer.

The material of the light absorbing unit 700 is also made of black, which is equivalent to two layers of black, and since the area of the light absorbing unit 700 below is larger than that of the black matrix unit 300, the refracted light is absorbed at the step surface formed between the light absorbing unit 700 and the black matrix unit 300, thereby greatly improving the effect of the display panel 30 for preventing the reflection of external light.

When the light transmittance of the light absorbing unit 700 is controllable, the step S23: the light absorbing unit is disposed on the pixel defining layer. The method further comprises the steps of:

s231: disposing an electrochromic layer on the pixel defining layer;

s232: and a transparent electrode is arranged on the electrochromic layer.

Compared with the scheme that the light absorbing unit 700 is directly made of black resistance material, the light transmittance of the light absorbing unit 700 is controllable by adopting the combination of the transparent electrode 710 and the electrochromic layer 720, and the increase of the light transmittance of the light absorbing unit 700 can be controlled when the display panel 30 displays pictures, so that the aperture ratio of the display panel 30 is not affected; the light transmittance of the light absorbing unit 700 is controlled to be reduced when the display panel 30 does not display a picture, so that the light reflection preventing effect of the display panel 30 is not affected.

It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, so long as the implementation of the present solution is possible, all should be considered as falling within the protection scope of the present application.

It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.

The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims (10)

1. The display panel comprises a substrate, an active switch layer, a pixel definition layer and a light-emitting unit, wherein the active switch layer is arranged on the substrate, the pixel definition layer is arranged on the active switch layer and corresponds to a non-opening area of the display panel; the light-emitting unit is arranged on the active switch layer and corresponds to the opening area of the display panel; it is characterized in that the method comprises the steps of,

the display panel further comprises a light filtering layer, the light filtering layer is arranged on one side, far away from the substrate, of the pixel definition layer and the light emitting unit, the light filtering layer comprises a black matrix unit and a light filtering unit, the black matrix unit corresponds to the pixel definition layer one by one, the light filtering unit corresponds to the light emitting unit one by one, the light filtering unit comprises a light filtering part and a spacer part, the light filtering part is stacked, the spacer part is arranged on one side, facing the substrate, of the light filtering part, the material of the light filtering part comprises a color resistance material, and the refractive index of the light filtering part is smaller than that of the spacer part.

2. The display panel of claim 1, wherein the material of the spacer portion comprises a color resist material comprising red, green, and blue color resists.

3. The display panel of claim 1, wherein the material of the spacer portion comprises a transparent anti-reflective material comprising one or more combinations of transparent polyimide organic material, silicon monoxide, silicon nitride, magnesium fluoride, titanium dioxide, aluminum oxide.

4. A display panel according to claim 2 or 3, wherein a side of the spacer portion adjacent to the filter portion is concave toward the substrate to form a spacer groove, a side of the filter portion adjacent to the spacer portion is convex toward the substrate to form a filter protrusion, and the shape of the filter protrusion is matched with the shape of the spacer groove;

taking the direction of the substrate facing the light emitting unit as a first direction, wherein the minimum thickness of the spacer part along the first direction is H1, the maximum thickness of the spacer part along the first direction is H2, and the thickness of the black matrix unit along the first direction is H3, wherein H1 is greater than 1/4 of H3, and H1 is less than 1/2 of H3; h2 is less than 3/4 of H3 and H2 is greater than 1/2 of H3.

5. The display panel according to claim 4, wherein a side of the filter portion facing away from the spacer portion is recessed toward the substrate to form a filter groove.

6. The display panel according to claim 4, further comprising light absorbing units, wherein the light absorbing units are in one-to-one correspondence with the black matrix units, and the black matrix units are stacked on a side of the light absorbing units facing away from the substrate;

the orthographic projection of the light absorbing unit on the substrate covers the orthographic projection of the black matrix unit on the substrate, and the orthographic projection area of the light absorbing unit on the substrate is larger than the orthographic projection area of the black matrix unit on the substrate;

wherein, the light absorbing unit may be used for absorbing light.

7. The display panel of claim 6, wherein the light absorbing unit includes a transparent electrode and an electrochromic layer stacked, the transparent electrode being positioned between the electrochromic layer and the black matrix unit, the material of the electrochromic layer including an electrochromic material, the transparent electrode driving a change in light transmittance of the electrochromic layer.

8. The display panel of claim 4, wherein the spacer recess has an inverted trapezoid shape, the spacer recess includes a spacer bottom surface and a spacer side surface, the spacer side surface is connected to an edge of the spacer bottom surface, and an included angle between the spacer side surface and the spacer bottom surface is an obtuse angle; the light filtering bulge is in an inverted trapezoid shape, the light filtering bulge comprises a light filtering top surface and a light filtering side surface, the light filtering side surface is connected with the edge of the light filtering top surface, and an included angle between the light filtering side surface and the light filtering top surface is an obtuse angle;

the filtering top surface is attached to the bottom surface of the isolation pad, and the filtering side surface is attached to the side surface of the isolation pad.

9. A method for manufacturing a display panel according to any one of claims 1 to 8, comprising the steps of:

preparing the active switching layer on the substrate;

preparing the pixel defining layer and the light emitting unit on the active switching layer;

preparing the black matrix unit on the pixel definition layer;

preparing the spacer portion on the light emitting unit;

preparing the light filtering part on the spacer part to form the light filtering layer;

wherein the pixel definition layer corresponds to the non-opening region; the light emitting unit corresponds to the opening area.

10. A display device comprising a drive circuit, characterized in that the display device further comprises a display panel according to any one of claims 1-8, the drive circuit being connected to the display panel.