Display panel and display device

Abstract

The present invention discloses a display panel and a display device, wherein the display panel comprises: a substrate; a pixel structure layer arranged on the substrate; an encapsulation layer and a color filter layer stacked in sequence on the pixel structure layer, wherein the color filter layer comprises: a black matrix and filter units of multiple colors, wherein the filter units are arranged in the opening area of ​​the black matrix. The transmission spectrum wavelength of the red filter unit has a first preset offset in the direction of short wavelength relative to the first reference transmission spectrum; and / or the transmission spectrum wavelength of the blue filter unit has a second preset offset in the direction of long wavelength relative to the second reference transmission spectrum, thereby effectively reducing the color separation degree of the reflected light diffraction pattern of the display panel in the dark state.

Description

Technical Field

[0001] The embodiments of the present specification relate to the field of display technology, and more particularly to a display panel and a display device. Background Art

[0002] In recent years, with the increasing application scope of OLED (Organic Light-Emitting Diode, OLED for short) display technology, users have also put forward higher requirements for OLED display products. In order to reduce the power consumption of OLED display products, the Color Filter on Encapsulation (COE) technology has been proposed. Compared with traditional polarizers, color filters have a higher transmittance to the light emitted by OLED display panels, which significantly increases the light output efficiency of display products and reduces product power consumption. However, due to the special matrix structure of the color filter, when the screen is in the dark state, the incident and reflection process of the external ambient light will form a strong diffraction effect, thereby forming a serious color separation phenomenon in the user's vision, affecting the optical properties of the display screen in the dark state. Summary of the invention

[0003] In view of the above problems, the embodiments of the present specification are proposed to provide a display panel and a display device that overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect, an embodiment of the present specification provides a display panel, including:

[0005] substrate substrate;

[0006] A pixel structure layer disposed on the substrate;

[0007] An encapsulation layer and a color filter layer are sequentially stacked on the pixel structure layer, wherein the color filter layer comprises: a black matrix and filter units of multiple colors, wherein the filter units are arranged in the opening area of ​​the black matrix;

[0008] Among them, the multiple color filter units include a red filter unit and a blue filter unit, the transmission spectrum wavelength of the red filter unit has a first preset offset toward the short wavelength direction relative to the first reference transmission spectrum; and / or the transmission spectrum wavelength of the blue filter unit has a second preset offset toward the long wavelength direction relative to the second reference transmission spectrum.

[0009] Furthermore, the first preset offset is between 5 nm and 50 nm.

[0010] Furthermore, the first preset offset is 25 nm.

[0011] Furthermore, the second preset offset is between 5 nm and 50 nm.

[0012] Furthermore, the first reference transmission spectrum has a wavelength range of 580-780 nm, and a transmission cutoff wavelength of the red filter unit is greater than or equal to 530 nm and less than 580 nm.

[0013] Furthermore, the dominant wavelength of the red light reflection spectrum of the display panel in the dark state is greater than 580 nm and less than 633 nm.

[0014] Furthermore, the red filter unit includes: an organic red pigment, a dispersant and a solvent, wherein the dispersion concentration of the organic red pigment is less than a first reference dispersion concentration corresponding to the first reference transmission spectrum.

[0015] Furthermore, the weight percentage of the dispersant is 50% to 75%.

[0016] Furthermore, the blue filter unit includes: an organic blue pigment, a dispersant and a solvent, wherein the dispersion concentration of the organic blue pigment is greater than a second reference dispersion concentration corresponding to the second reference transmission spectrum.

[0017] Furthermore, the size of the opening area is less than 50 μm, the pixel structure layer includes light-emitting devices of multiple different colors, and the opening area at least partially overlaps with the orthographic projection of the light-emitting device of the corresponding color on the base substrate.

[0018] In a second aspect, an embodiment of the present specification provides a display device, comprising the display panel described in the first aspect.

[0019] The technical solutions provided in the embodiments of this specification have at least the following technical effects or advantages:

[0020] The display panel and display device provided by the embodiments of the present specification improve the transmission spectrum characteristics of the red filter unit and / or the blue filter unit in the color film layer arranged on the encapsulation layer, so that the transmission spectrum wavelength of the red filter unit has a first preset offset toward the short wavelength direction relative to the first reference transmission spectrum, that is, the transmission spectrum of the red filter unit is blue-shifted; and / or, the transmission spectrum wavelength of the blue filter unit has a second preset offset toward the long wavelength direction relative to the second reference transmission spectrum, that is, the transmission spectrum of the blue filter unit is red-shifted, which can reduce the size difference between the red diffraction pattern and the blue diffraction pattern, which is beneficial to improve the overlap of the red diffraction pattern, the green diffraction pattern and the blue diffraction pattern, thereby reducing the color separation degree of the diffraction pattern of the reflected light of the display panel when the display panel is in a dark state.

[0021] The above description is only an overview of the technical solutions provided by the embodiments of this specification. In order to more clearly understand the technical means of the embodiments of this specification, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of this specification more obvious and easy to understand, the specific implementation methods of the embodiments of this specification are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an exemplary display panel in the embodiments of this specification;

[0024] Figure 2 The spectrum diagram of the white light LED light source and the transmission spectrum diagram of each color filter unit in the embodiment of this specification;

[0025] Figure 3 The reflectance spectrum diagram of the display panel in the dark state in the embodiment of this specification;

[0026] Figure 4 is a diffraction intensity distribution diagram of each color of reflected light in the embodiment of this specification;

[0027] Figure 5 The diffraction pattern of each monochromatic reflected light of the display panel in the dark state in the embodiment of this specification;

[0028] Figure 6 Improve the reflected light diffraction pattern of the white light LED light source before and after the embodiment of this specification;

[0029] Figure 7 This is a color coordinate distribution curve diagram of the front and rear reflected light diffraction patterns at different scales in the embodiment of this specification;

[0030] Figure 8 This is a chromatic aberration distribution diagram of improving the diffraction pattern of the front and rear reflected light in the embodiment of this specification;

[0031] Fig. 9 It is a schematic diagram of the structure of the display device in the embodiment of this specification. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. The term "and / or" appearing herein is merely a description of an association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0033] Figure 1 FIG. 1 shows a schematic diagram of the structure of an exemplary display panel. Figure 1 As shown, the display panel includes: a base substrate 101, a pixel structure layer arranged on the base substrate 101, and an encapsulation layer 120 and a color filter layer 140 stacked in sequence on the pixel structure layer.

[0034] The pixel structure layer includes a light emitting device 113 and a thin film transistor array 111 located between the light emitting device 113 and the base substrate 101. In addition, the display panel may further include a pixel defining layer 112, which is disposed between each sub-pixel and is used to define a plurality of sub-pixel regions.

[0035] For example, the light emitting device 113 may be an OLED device or a QLED (Quantum Dot Light Emitting Diodes) device, etc., which is not limited in this embodiment.

[0036] Specifically, the light emitting device 113 may include: a first electrode 1131, a light emitting layer 1132, and a second electrode (not shown in the figure) arranged in layers. The first electrode 1131 is a light reflecting electrode, which may also be generally referred to as an anode; the second electrode is a light transmitting electrode, which may also be generally referred to as a cathode. The pixel defining layer 112 has a pixel opening, and the light emitting layer 1132 in the light emitting device 113 is located in the pixel opening.

[0037] The encapsulation layer 120 is used to encapsulate the light emitting device 113, isolate the light emitting device 113 from the outside air, and prevent the light emitting layer 1132 in the light emitting device 113 from being corroded by components such as moisture and oxygen in the air. For example, the encapsulation layer 120 can be a thin film encapsulation (TFE) layer. In addition, the display panel can also include a touch layer 130, for example, which can be arranged between the encapsulation layer 120 and the color filter layer 140 to realize the screen touch function, and the details can be referred to the relevant technology.

[0038] The color filter layer 140 includes a black matrix 141 and filter units of various colors. The black matrix 141 has a plurality of opening areas, and the filter units of the various colors are correspondingly arranged in each opening area. For example, the filter units of the various colors may include a red (R) filter unit 142a, a green (G) filter unit 142b, and a blue (B) filter unit 142c. On the one hand, the color filter unit can filter the light emitted by the display panel to improve the color purity of the emitted light; on the other hand, the color filter unit can also filter the external light, which can reduce the ambient light entering the display panel, thereby reducing the reflection of the ambient light by the display panel and improving the user experience.

[0039] It can be understood that, in the display panel, the light-emitting device 113 corresponds one-to-one to each opening area, or it can be said that it corresponds one-to-one to the filter unit. For example, a red light-emitting device, a green light-emitting device and a blue light-emitting device may be provided in the display panel, and a red filter unit 142a is provided in the opening area corresponding to the red light-emitting device, a green filter unit 142b is provided in the opening area corresponding to the green light-emitting device, and a blue filter unit 142c is provided in the opening area corresponding to the blue light-emitting device. Specifically, each opening area at least partially overlaps with the orthographic projection of the light-emitting device of the corresponding color on the base substrate 101. For another example, a white light-emitting device for emitting white light may also be provided in the display panel, which is not limited in this embodiment. Of course, in order to maximize the light output rate of the display panel, the orthographic projection of the opening area on the base substrate 101 can completely cover the orthographic projection of the light-emitting layer of the corresponding light-emitting device on the base substrate 101.

[0040] Considering that the size of the opening area of ​​the black matrix 141 is relatively small, for example, less than 50 μm, when the screen is in a dark state, the incident and reflection process of the external ambient light will form a strong diffraction effect, which will visually form a serious color separation phenomenon, thereby affecting the optical properties of the display panel in the dark state. The display panel provided in this embodiment improves the transmission spectrum characteristics of the red filter unit 142a and / or the blue filter unit 142c, and there are three specific implementation methods as follows.

[0041] First, the transmission spectrum wavelength of the red filter unit 142a has a first preset offset toward the short wavelength direction relative to the first reference transmission spectrum, such as Figure 2 That is, the material or structure of the red filter unit 142a is adjusted so that the transmission spectrum of the red filter unit 142a is blue-shifted. For example, the first reference transmission spectrum may be the transmission spectrum of the red filter unit in the existing display panel. Figure 2, respectively, show the spectrum of the white light LED light source, the transmission spectrum Tr(B) of the blue filter unit 142c, the transmission spectrum Tr(G) of the green filter unit 142b, the transmission spectrum Tr(R) of the red filter unit before improvement, and the transmission spectrum Tr(R)* of the red filter unit 142a after improvement. Figure 2 Taking the illustrated scenario as an example, the transmission band range of the first reference transmission spectrum is 580nm to 780nm, and the transmission spectrum of the improved red filter unit 142a is relatively blue-shifted, and the transmission cutoff wavelength is reduced from λ0 to λ0′. The transmission cutoff wavelength is the lower limit wavelength of the transmission band of the red filter unit 142a.

[0042] According to the rectangular aperture Fraunhofer diffraction model, the size of the bright spot in the center of the diffraction pattern is proportional to the wavelength of the light wave. When the display panel is in the dark state, there are large differences in the main wavelengths of the red, green, and blue reflected light spectra. In particular, the main wavelength of the red reflected light (such as 633nm) is more biased towards long wavelengths, which makes the size of the red reflected light diffraction pattern (Pattern) too large, resulting in a wide distribution of the color coordinates (CIE) of the diffraction pattern color when the display panel is in the dark state, and there is a colorful distribution. The colors of different positions in the diffraction pattern vary greatly, and the color difference value is also large.

[0043] In this embodiment, the transmission spectrum of the red filter unit 142a is adjusted to make it blue-shifted as a whole, so that the main wavelength of the red light reflection spectrum of the display panel to the external ambient light in the dark state is also blue-shifted. Figure 3 shown. Figure 3 The blue light reflection spectrum Re(B), green light reflection spectrum Re(G), red light reflection spectrum Re(R) before improvement and red light reflection spectrum Re(R)* after improvement of the display panel in the dark state are shown in FIG. The same white light LED light source is used to illuminate the dark state display panel before improvement and the dark state display panel after improvement. If the main wavelength λ1 of the red light reflection spectrum of the display panel before improvement is 633nm, the main wavelength λ1′ of the red light reflection spectrum of the display panel after improvement can be greater than 580nm and less than 633nm. For example, Figure 3 As shown, when the transmission spectrum of the red filter unit 142a is blue-shifted by 25 nm, the main wavelength of the red light reflection spectrum of the display panel can be blue-shifted from 633 nm to 610 nm.

[0044] In this way, the size of each level of diffraction of the red reflected light can be reduced, and it can be closer to the diffraction peaks of each level of the green reflected light and the blue reflected light. That is, the size of the central bright spot of the diffraction pattern of the red reflected light is closer to the size of the central bright spot of the diffraction pattern of the green and blue reflected light. This makes the final RGB synthetic color diffraction pattern have a better visual effect, and the degree of intuitive color separation is significantly reduced.

[0045] In specific implementation, the first preset offset can be set according to actual needs and multiple tests. For example, the first preset offset can be between 5nm and 50nm, for example, it can be 5nm, 20nm, 25nm or 50nm. Taking the transmission band range of the first reference transmission spectrum as: 580nm~780nm as an example, after improvement, the transmission cutoff wavelength λ0′ of the red filter unit 142a is greater than or equal to 530nm and less than 580nm. For example, if the blue shift is 5nm, the transmission band of the above-mentioned red filter unit 142a is: 575nm~780nm, that is, the transmission cutoff wavelength λ0′ is 575nm; if the blue shift is 25nm, the transmission band of the above-mentioned red filter unit 142a is: 555nm~780nm, that is, the transmission cutoff wavelength λ0′ is 555nm; if the blue shift is 50nm, the transmission band of the above-mentioned red filter unit 142a is: 530nm~780nm, that is, the transmission cutoff wavelength λ0′ is 530nm.

[0046] It is understandable that the commonly used color filter manufacturing methods include: dyeing method, pigment dispersion method, printing method, electroplating method, etc. Based on the consideration of manufacturing cost and quality, the color filter manufactured by the pigment dispersion method has high precision and better light resistance and heat resistance.

[0047] Taking the red filter unit 142a prepared by the pigment dispersion method as an example, the preparation material of the red filter unit 142a can be adjusted so that the transmission spectrum of the red filter unit 142a in the display panel is blue-shifted. The main components of the red filter unit 142a include: organic red pigment, dispersant and solvent. Of course, in addition to this, the red filter unit 142a can also include other components, such as photopolymerization initiator, etc. For example, the organic red pigment can be a mixed material of anthraquinone and pyrrolopyrrole. The dispersant can be used alone or in a mixture of two or more, and its main functions are: wetting, dispersing, anti-flocculation and stabilizing the dispersed system, reducing viscosity, etc. For example, the dispersant can be a polyvinyl alcohol and acrylic resin dispersant.

[0048] In an optional embodiment, the dispersion concentration of the organic red pigment can be reduced relative to the existing red filter unit, so that its absorption wavelength is blue-shifted, thereby making the transmission spectrum of the prepared red filter unit 142a blue-shifted as a whole. That is, in the red filter unit 142a of the display panel provided by this embodiment, the dispersion concentration of the organic red pigment is less than the first reference dispersion concentration corresponding to the above-mentioned first reference transmission spectrum. The first reference dispersion concentration is the dispersion concentration of the organic red pigment in the existing red filter unit.

[0049] Specifically, the dispersion concentration of the organic red pigment can be reduced by changing the weight percentage of the red organic pigment and the dispersant in the red filter. For example, the weight percentage of the dispersant can be increased from the existing 15% to 35% to 50% to 75%. For example, the weight percentage of the dispersant can be: 50%, 55%, 60%, 65%, 70% or 75%, etc., which can be determined by experiments based on the actual amount of blue shift to be achieved.

[0050] It should be noted that in other embodiments of the present specification, other applicable methods may also be used to blue-shift the transmission spectrum of the red filter unit 142 a , which is not limited to the present embodiment.

[0051] The second type is that the wavelength of the transmission spectrum of the blue filter unit 142c has a second preset offset toward the long wavelength direction relative to the second reference transmission spectrum. In other words, the material or structure of the blue filter unit 142c is adjusted so that the transmission spectrum of the blue filter unit 142c is red-shifted as a whole. The second reference transmission spectrum can be the transmission spectrum of the existing blue filter unit, for example, the transmission band range of the second reference transmission spectrum can be: 380nm ~ 560nm.

[0052] Similar to the principle of blue shift of the transmission spectrum of the red filter unit 142a mentioned above, the red shift of the transmission spectrum of the blue filter unit 142c can make the central bright spot size of the blue light reflected light diffraction pattern closer to the central bright spot size of the green light and red light reflected light diffraction patterns, so that the final RGB synthetic color diffraction pattern has a better visual effect, and the degree of color separation is significantly reduced intuitively.

[0053] In specific implementation, the second preset offset can be set according to actual needs and multiple tests. For example, the second preset offset can also be between 5nm and 50nm, for example, it can be 5nm, 20nm, 25nm or 50nm.

[0054] Taking the transmission band range of the second reference transmission spectrum as 380nm~560nm as an example, if the red shift is 5nm, the transmission band of the above-mentioned blue filter unit 142c is: 385nm~565nm; if the red shift is 20nm, the transmission band of the above-mentioned blue filter unit 142c is: 400nm~580nm; if the red shift is 25nm, the transmission band of the above-mentioned blue filter unit 142c is: 405nm~585nm; if the red shift is 50nm, the transmission band of the above-mentioned blue filter unit 142c is: 430nm~610nm.

[0055] Similarly, taking the blue filter unit 142c prepared by the pigment dispersion method as an example, the preparation material of the blue filter unit 142c can be adjusted so that the transmission spectrum of the blue filter unit 142c in the display panel is red-shifted. For example, the blue filter unit 142c includes: an organic blue pigment, a dispersant, and a solvent, wherein the dispersion concentration of the organic blue pigment is greater than the second reference dispersion concentration corresponding to the second reference transmission spectrum, and the second reference dispersion concentration is the dispersion concentration of the organic blue pigment in the existing blue filter unit. For example, by changing the weight percentage of the blue organic pigment and the dispersant in the blue filter, the dispersion concentration of the organic blue pigment can be increased so that its absorption wavelength is red-shifted, thereby making the transmission spectrum of the prepared blue filter unit 142c red-shifted as a whole.

[0056] It should be noted that in other embodiments of the present specification, other applicable methods may also be used to red-shift the transmission spectrum of the blue filter unit 142 c , which is not limited to the present embodiment.

[0057] The third type is that the wavelength of the transmission spectrum of the red filter unit 142a has a first preset offset toward the short wavelength direction relative to the first reference transmission spectrum, and the wavelength of the transmission spectrum of the blue filter unit 142c has a second preset offset toward the long wavelength direction relative to the second reference transmission spectrum. The specific implementation and principle of the blue shift of the transmission spectrum of the red filter unit 142a and the red shift of the transmission spectrum of the blue filter unit 142c can refer to the relevant description above, which will not be repeated here.

[0058] By combining the above two implementations, the size of each level of diffraction of the red light reflected light is reduced while the size of each level of diffraction of the blue light reflected light is expanded. In this way, the red light reflected light diffraction pattern and the blue light reflected light diffraction pattern will be closer to the green light reflected light diffraction pattern in the middle, thereby reducing the degree of color separation of the display panel reflected light diffraction pattern.

[0059] In order to verify the technical effect of the display panel provided by the embodiments of this specification, the inventors conducted multiple experiments. The following describes the experimental results of the blue shift of the transmission spectrum of the red filter unit 142a by 25nm, taking the AMOLED (Active-Matrix Organic Light-Emitting Diode) COE display panel as the experimental object.

[0060] like Figure 2 As shown, the transmission spectrum of the red filter unit 142a is adjusted to be blue-shifted by 25nm as a whole. Accordingly, when the display panel is in a dark state, the main wavelength of the red light reflection spectrum of the white light LED light source will be blue-shifted by 23nm as a whole, that is, the main wavelength is blue-shifted from 633nm to 610nm. Figure 3As shown in the figure. Due to the blue shift of the main wavelength of the red reflected light of the AMOLED COE display panel in the dark state, the size of the diffraction patterns of the red reflected light of the display panel will shrink, as shown in the figure. Figure 4 and 5 shown.

[0061] Figure 4 The 1st to 3rd order diffraction curves of each color reflected light are shown, from left to right: blue light (B), green light (G), red light after improvement (R*), and red light before improvement (R). Figure 4 (b) in the figure is the diffraction curve obtained by enlarging (a) so as to more clearly distinguish each diffraction curve. Figure 4 In the figure, the horizontal axis is the diffraction size (in cm), that is, the different positions of the diffraction pattern, the zero point of the horizontal axis is the center point of the central bright spot, and the vertical axis is the relative diffraction intensity. Figure 4 As shown, by comparing the 1st to 3rd order diffraction curves of the red light reflected light before and after improvement, it can be seen that after improvement, the 1st to 3rd order diffraction peaks of the red light reflected light are overall shrunk toward the origin, and are closer to the diffraction peaks of the green and blue light reflected light.

[0062] Figure 5 shows the diffraction pattern of each monochromatic reflected light in the dark state of the display panel, where: Figure 5 Figure (a) shows the diffraction pattern of the red reflected light before improvement. Figure 5 Figure (b) shows the diffraction pattern of the red reflected light after improvement. Figure 5 Figure (c) shows the diffraction pattern of green reflected light. Figure 5 Figure (d) shows the diffraction pattern of blue light reflected. Figure 6 Figure (a) shows the diffraction pattern of the reflected light of the white light LED light source in the dark state of the front display panel. Figure 6 Figure (b) shows the diffraction pattern of the reflected light of the white light LED light source in the improved display panel in the dark state.

[0063] from Figure 5 and Figure 6 It can also be seen that the size of the central bright spot of the red light reflected light diffraction is significantly reduced, closer to the size of the central bright spot of the green and blue light reflected light diffraction, so that the final RGB synthetic color diffraction pattern has a better visual effect, and the degree of color separation is significantly reduced intuitively.

[0064] Furthermore, in order to more clearly compare the degree of color separation of the reflected light diffraction of the display panel in the dark state before and after the improvement, the inventors also Figure 6 The color data of the diffraction pattern in the image is processed to obtain the color coordinate distribution curves of the reflected light diffraction pattern at different scales before and after improvement, such as Figure 7 shown. Figure 7The horizontal axis is the diffraction size (in cm), that is, the different positions of the diffraction pattern, and the vertical axis CIEx is the x-coordinate in the color coordinate. Figure 7 It can be seen from the color coordinate distribution curves before and after the improvement that after the transmission spectrum of the red filter unit 142a is blue-shifted by 25nm, the color distribution range of the diffraction pattern of the display panel in the dark state is narrowed.

[0065] In addition, if Figure 8 As shown, the inventors also tested the color difference, i.e., the color difference distribution, of the diffraction pattern of the dark-state reflected light of the display panel before and after the improvement. Figure 8 The horizontal axis is the diffraction size (in cm), that is, the different positions of the diffraction pattern, and the vertical axis is the color difference △C. Figure 8 It can be seen that after the transmission spectrum of the red filter unit 142a is improved, the maximum color difference max△C of the display panel in the dark state is reduced from 37.0 to 29.7, that is, the color separation degree of the diffraction pattern of the reflected light of the display panel in the dark state is effectively reduced.

[0066] Therefore, the display panel provided in the embodiment of the present specification improves the transmission spectrum characteristics of the red filter unit 142a and / or the blue filter unit 142c in the color filter layer 140 arranged on the encapsulation layer 120, so that the transmission spectrum of the red filter unit 142a is blue-shifted; and / or the transmission spectrum of the blue filter unit 142c is red-shifted, which can reduce the size difference between the red diffraction pattern and the blue diffraction pattern, which is beneficial to improve the overlap of the red diffraction pattern, the green diffraction pattern and the blue diffraction pattern, thereby reducing the color separation degree of the diffraction pattern of the reflected light when the display panel is in a dark state.

[0067] Based on the same inventive concept, Fig. 9 As shown, the embodiment of this specification also provides a display device 10, including the display panel 100 provided in the first aspect. For example, the display panel 100 can be: an OLED display panel, a Micro-OLED display panel, an AMOLED display panel, or a QLED display panel, etc., which is not limited in this embodiment; the display device 10 can be a product or component with a display function, such as a mobile phone, a computer, a television, and a wearable display device.

[0068] In the above description, the technical details such as the composition of each layer of the product are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above. Although each embodiment is described separately above, it does not mean that the measures in each embodiment cannot be used in combination to advantage.

[0069] In addition, those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples; based on the ideas of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present specification as described above, which are not provided in detail for the sake of simplicity.

[0070] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel structure layer disposed on the substrate; An encapsulation layer and a color filter layer are sequentially stacked on the pixel structure layer, wherein the color filter layer comprises: a black matrix and filter units of multiple colors, wherein the filter units are arranged in the opening area of ​​the black matrix; Among them, the multiple color filter units include a red filter unit and a blue filter unit, the transmission spectrum wavelength of the red filter unit has a first preset offset toward the short wavelength direction relative to the first reference transmission spectrum; and / or the transmission spectrum wavelength of the blue filter unit has a second preset offset toward the long wavelength direction relative to the second reference transmission spectrum.

2. The display panel according to claim 1, characterized in that: The first preset offset is between 5 nm and 50 nm.

3. The display panel according to claim 2, characterized in that: The first preset offset is 25 nm.

4. The display panel according to claim 1, characterized in that: The second preset offset is between 5 nm and 50 nm.

5. The display panel according to claim 1, characterized in that: The first reference transmission spectrum has a wavelength range of 580 to 780 nm, and a transmission cutoff wavelength of the red filter unit is greater than or equal to 530 nm and less than 580 nm.

6. The display panel according to claim 1, characterized in that: The dominant wavelength of the red light reflection spectrum of the display panel in a dark state is greater than 580 nm and less than 633 nm.

7. The display panel according to claim 1, characterized in that: The red filter unit includes: an organic red pigment, a dispersant, and a solvent, wherein the dispersion concentration of the organic red pigment is less than a first reference dispersion concentration corresponding to the first reference transmission spectrum.

8. The display panel according to claim 7, characterized in that: The weight percentage of the dispersant is 50% to 75%.

9. The display panel according to claim 1, characterized in that: The blue filter unit includes: an organic blue pigment, a dispersant, and a solvent, wherein a dispersion concentration of the organic blue pigment is greater than a second reference dispersion concentration corresponding to the second reference transmission spectrum.

10. The display panel according to claim 1, characterized in that: The size of the opening area is less than 50 μm, the pixel structure layer includes light-emitting devices of multiple different colors, and the opening area at least partially overlaps with the orthographic projection of the light-emitting device of the corresponding color on the base substrate.

11. A display device, characterized in that: A display panel comprising any one of claims 1-10.

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