Display panel and preparation method of display panel

Abstract

The application provides a display panel and a preparation method of the display panel. The display panel comprises a substrate, a light-emitting device layer and a chromaticity adjustment layer. The light-emitting device layer is located on one side of the substrate, and comprises a plurality of light-emitting pixel units. The chromaticity adjustment layer is located on the side of the light-emitting device layer away from the substrate, and comprises a plurality of chromaticity adjustment units. The light emitted by the light-emitting pixel units irradiates the chromaticity adjustment units, and the chromaticity adjustment units are excited to emit light of the same color in the direction away from the light-emitting device layer. The light-emitting energy of the chromaticity adjustment units is not greater than the light-emitting energy of the light-emitting pixel units. In the display panel, the chromaticity adjustment units can absorb the light of high energy, i.e. the light with large chromaticity deviation, emitted by the corresponding light-emitting pixel units at a large exit angle, and are excited to generate light of low energy, i.e. light of the corresponding expected color, so that the color gamut is optimized and the color deviation phenomenon is improved.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display panel and a method for manufacturing the display panel. Background Technology

[0002] Organic light-emitting diode (OLED) displays have many advantages, such as self-illumination, fast response, wide viewing angle, and the ability to be fabricated on flexible substrates. They are increasingly being used in high-performance display fields such as flexible display devices.

[0003] Organic light-emitting display panels contain multiple light-emitting units that emit different colors. During use, as the viewing angle increases, the wavelength range of the light emitted by the light-emitting units will change, which can easily lead to color shift in the display panel and affect the display effect. Summary of the Invention

[0004] This application provides a display panel and a method for manufacturing the display panel, which can reduce the color shift of the display panel.

[0005] In a first aspect, embodiments of this application provide a display panel, including a substrate, a light-emitting device layer, and a colorimetric adjustment layer. The light-emitting device layer is located on one side of the substrate and includes a plurality of light-emitting pixel units. The colorimetric adjustment layer is located on the side of the light-emitting device layer opposite to the substrate and includes a plurality of colorimetric adjustment units. Light emitted from the light-emitting pixel units illuminates the colorimetric adjustment units, exciting the colorimetric adjustment units to emit light of the same color in the direction opposite to the light-emitting device layer. The luminous energy of the colorimetric adjustment units is not greater than the luminous energy of the light-emitting pixel units.

[0006] In some embodiments, the orthographic projection of the light-emitting pixel unit on the substrate and the orthographic projection of the corresponding chromaticity adjustment unit on the substrate at least partially overlap.

[0007] In some embodiments, the orthographic projection of each light-emitting pixel unit onto the substrate lies within the orthographic projection of each chromaticity adjustment unit onto the substrate.

[0008] In some embodiments, the orthographic projection center of the chromaticity adjustment unit on the substrate coincides with the orthographic projection center of the light-emitting pixel unit on the substrate.

[0009] In some embodiments, the chromaticity adjustment unit has an absorption wavelength range and an emission wavelength range, wherein the emission wavelength range is greater than the absorption wavelength range and the two do not overlap.

[0010] In some embodiments, the plurality of light-emitting pixel units include a blue pixel unit that emits blue light, and the plurality of chromaticity adjustment units include a blue chromaticity adjustment unit that is excited to emit blue light and a non-blue chromaticity adjustment unit that is excited to emit red or green light.

[0011] The blue pixel unit corresponds to the blue chromaticity adjustment unit. The blue chromaticity adjustment unit and the blue pixel unit have a first ratio in their projected areas on the substrate. The non-blue blue chromaticity adjustment unit and the corresponding light-emitting pixel unit have a second ratio in their projected areas on the substrate. The first ratio is greater than the second ratio.

[0012] In some embodiments, the chromaticity adjustment layer further includes a light-blocking layer, which includes a plurality of openings extending through its thickness, and the chromaticity adjustment unit is located within the openings.

[0013] In some embodiments, the light-blocking layer comprises an opaque material.

[0014] In some embodiments, the colorimetric adjustment unit includes a plurality of quantum dot materials, and the number of quantum dot materials gradually increases in the direction from the center of the colorimetric adjustment unit to the edge of the colorimetric adjustment unit.

[0015] In some embodiments, the concentration of quantum dot material gradually increases in the direction from the center of the colorimetric adjustment unit to the edge of the colorimetric adjustment unit.

[0016] In some embodiments, the thickness of the chromaticity adjustment unit gradually increases in the direction from the center of the chromaticity adjustment unit to the edge of the chromaticity adjustment unit.

[0017] In some embodiments, the chromaticity adjustment unit is recessed on the surface of the substrate in a direction away from the light-emitting device layer to form a receiving groove, and the chromaticity adjustment layer further includes a light control section for adjusting the direction of the light emitted by the light-emitting unit, the light control section being located in the receiving groove.

[0018] In some embodiments, the receiving groove includes a bottom wall that is shaped to project away from or near the substrate and is curved.

[0019] In some embodiments, the display panel further includes an encapsulation layer located between the color adjustment layer and the light-emitting device layer, wherein the refractive index of the light control unit is different from that of the encapsulation layer.

[0020] In some embodiments, the display panel includes a fingerprint recognition area and a display area surrounding the fingerprint recognition area. The orthographic projection area of ​​the color adjustment unit located in the fingerprint recognition area on the substrate is larger than the orthographic projection area of ​​the color adjustment unit of the corresponding color located in the display area on the substrate.

[0021] Secondly, embodiments of this application provide a method for manufacturing a display panel, comprising:

[0022] A light-emitting device layer is formed on a substrate, and the light-emitting device layer includes multiple light-emitting pixel units;

[0023] A chromaticity adjustment layer is formed on the side of the light-emitting device layer away from the substrate, and the chromaticity adjustment layer includes multiple chromaticity adjustment units;

[0024] The light emitted by the light-emitting pixel unit shines on the color adjustment unit, exciting the color adjustment unit to emit light of the same color in the direction away from the light-emitting device layer of the color adjustment layer; the light emission energy of the color adjustment unit is not greater than the light emission energy of the light-emitting pixel unit.

[0025] In some embodiments, a color adjustment layer is formed on the side of the light-emitting device layer facing away from the substrate, including:

[0026] Multiple light modulation sections are formed on the side of the light-emitting device layer away from the substrate;

[0027] A chromaticity adjustment unit is formed on the side of the light control section away from the substrate. The chromaticity adjustment unit covers the light control section. The thickness of the chromaticity adjustment unit gradually increases from the center of the chromaticity adjustment unit to the edge of the chromaticity adjustment unit.

[0028] This application provides a display panel and a method for manufacturing the display panel. The color adjustment unit in the display panel can absorb high-energy light emitted by the corresponding light-emitting pixel unit at a large emission angle (i.e., light with large color deviation) and be excited to generate low-energy light (i.e., light corresponding to the desired color), thereby optimizing the color gamut and improving color shift. Simultaneously, the emission direction of the color adjustment unit is more divergent than that of the light-emitting pixel unit, which can also improve viewing angle characteristics. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0031] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of AA;

[0032] Figure 3 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0033] Figure 4This is one of the cross-sectional structural schematic diagrams of a display panel provided in the embodiments of this application;

[0034] Figure 5 This is a second cross-sectional structural schematic diagram of a display panel provided in the embodiments of this application;

[0035] Figure 6 This is a third cross-sectional structural schematic diagram of a display panel provided in the embodiments of this application;

[0036] Figure 7 yes Figure 1 Schematic diagram of the cross-sectional structure of BB;

[0037] Figure 8 This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0038] Figures 9a to 9b This application provides a schematic diagram of the process structure of a method for manufacturing a display panel;

[0039] Figure 10 This is a flowchart of another method for manufacturing a display panel provided in an embodiment of this application;

[0040] Figures 11a to 11b This application provides a schematic diagram of the process structure of another method for manufacturing a display panel.

[0041] Marker explanation:

[0042] 1. Substrate;

[0043] 2. Light-emitting device layer; 21. Light-emitting pixel unit; 22. Blue pixel unit;

[0044] 3. Chromaticity adjustment layer; 31. Chromaticity adjustment unit; 311. Receiving groove; 3111. Bottom wall; 312. Blue chromaticity adjustment unit; 32. Light blocking layer; 321. Opening; 33. Light control unit;

[0045] 4. Encapsulation layer;

[0046] AA, display area; FA, fingerprint recognition area. Detailed Implementation

[0047] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0049] Organic light-emitting display panels (OLEDs) employ two emission modes based on the light emission method: top-emitting and bottom-emitting. In top-emitting structures, microcavity structures are typically used to improve luminous efficiency and color gamut. However, the microcavity structure is prone to causing color shift in the display panel due to two main reasons. First, within each light-emitting unit, the presence of microcavity resonance causes the resonant wavelength to shift towards shorter wavelengths as the viewing angle increases, resulting in a change in the light's chromaticity. Second, as the viewing angle increases (i.e., as the emission angle increases), the luminous intensity of different colored light-emitting units varies proportionally, leading to a change in the color of the mixed light and consequently, color shift.

[0050] To resolve the above issues, please refer to Figure 1 and Figure 2This application provides a display panel including a substrate 1, a light-emitting device layer 2, and a colorimetric adjustment layer 3. The light-emitting device layer 2 is located on one side of the substrate 1 and includes a plurality of light-emitting pixel units 21. The colorimetric adjustment layer 3 is located on the side of the light-emitting device layer 2 opposite to the substrate 1 and includes a plurality of colorimetric adjustment units 31. Light emitted from the light-emitting pixel units 21 illuminates the colorimetric adjustment units 31, exciting the colorimetric adjustment units 31 to emit light of the same color in the direction opposite to the light-emitting device layer 2 of the colorimetric adjustment layer 3. The luminous energy of the colorimetric adjustment unit 31 is not greater than the luminous energy of the light-emitting pixel units 21.

[0051] The substrate 1 can be made of a light-transmitting material such as glass or polyimide (PI). The light-emitting device layer 2 is disposed on one side of the substrate 1 and includes a plurality of light-emitting pixel units 21 capable of emitting different colors of light. For example, the light-emitting device layer 2 includes a blue light-emitting pixel unit capable of emitting blue light, a red light-emitting pixel unit capable of emitting red light, and a green light-emitting pixel unit capable of emitting green light.

[0052] The chromaticity adjustment layer 3 and the light-emitting device layer 2 are located on the same side of the substrate 1. The chromaticity adjustment layer 3 includes a plurality of chromaticity adjustment units 31, which can emit light of a specific color after being excited by light or current. The chromaticity adjustment units 31 are correspondingly arranged with the light-emitting pixel units 21, wherein the corresponding arrangement of the chromaticity adjustment units 31 and the light-emitting pixel units 21 means that their colors correspond. For example, the blue light-emitting pixel unit can emit blue light and illuminate the blue chromaticity adjustment unit, which is then excited to emit blue light.

[0053] The color adjustment unit 31 can absorb light in the lower wavelength range, i.e., high-energy light, and excite light in the higher wavelength range, i.e., low-energy light. The color adjustment unit 31 includes multiple quantum dot materials. Quantum dot materials are semiconductor ultrafine particles with a diameter less than a nanometer. The unique characteristic of quantum dot materials is that if different sizes of quantum dot materials are excited with light of the same color, they will exhibit different colors of light. Based on this characteristic, the size of the quantum dot materials in the color adjustment unit 31 can be adjusted and controlled so that the color of the light emitted by the corresponding light-emitting pixel unit 21 is the same as the color of the light produced by the color adjustment unit 31 after excitation, thereby improving the color shift problem of the display panel.

[0054] Specifically, the light-emitting pixel unit 21 can emit light of the desired color within a preset angle, that is, light within the desired wavelength range. However, as the viewing angle, i.e., the light emission angle, increases, the wavelength of the light will shift towards a shorter wavelength. The shortening of the wavelength will lead to an increase in light energy and a deviation in light chromaticity, resulting in color shift. Based on this, this embodiment adds a chromaticity adjustment unit 31 and adjusts the quantum dot material within the chromaticity adjustment unit 31 so that the chromaticity adjustment unit 31 can absorb high-energy light and emit low-energy light, that is, emit light within the desired wavelength range, i.e., emit light of the desired color, thereby improving the color shift problem.

[0055] It should be noted that in this embodiment, the color of the light emitted by the light-emitting pixel unit 21 is the same as the color of the light generated by the color adjustment unit 31 after being excited. The color of the light emitted by the light-emitting pixel unit 21 refers to the desired color of the light emitted by the light-emitting pixel unit 21, that is, the light emitted by the light-emitting pixel unit 21 within a preset angle. For example, the desired color can be the color of the light emitted by the light-emitting pixel unit 21 perpendicular to the light-emitting surface.

[0056] Furthermore, the embodiments of this application do not limit the size of the quantum dot material within the colorimetric adjustment unit 31, as long as the colorimetric adjustment unit 31 can be excited to produce light of the desired color according to actual usage needs.

[0057] The chromaticity adjustment unit 31 provided in this embodiment can absorb the high-energy light emitted by the corresponding light-emitting pixel unit 21 at a large emission angle, i.e., light with large chromaticity deviation, and be excited to generate low-energy light, i.e. light corresponding to the desired color, thereby optimizing the color gamut and improving the color shift phenomenon. At the same time, the emission direction of the chromaticity adjustment unit 31 is more divergent than that of the light-emitting pixel unit 21, which can also improve the viewing angle characteristics.

[0058] In some embodiments, such as Figure 2 As shown, the orthographic projection of the light-emitting pixel unit 21 on the substrate 1 and the orthographic projection of the corresponding chromaticity adjustment unit 31 on the substrate 1 at least partially overlap.

[0059] In this embodiment, the positions of the light-emitting pixel unit 21 and the corresponding chromaticity adjustment unit 31 are at least partially overlapped, so that the light emitted by the light-emitting pixel unit 21 can more easily enter the corresponding chromaticity adjustment unit 31, thereby further enhancing the light adjustment function of the chromaticity adjustment layer 3 on the light-emitting device layer 2.

[0060] In some embodiments, please refer to Figure 3 The orthographic projection of each light-emitting pixel unit 21 onto the substrate 1 is located within the orthographic projection of each chromaticity adjustment unit 31 onto the substrate 1.

[0061] In the thickness direction of the display panel, each chromaticity adjustment unit 31 can cover the corresponding light-emitting pixel unit 21. This design allows the chromaticity adjustment unit 31 to absorb more light from the light-emitting pixel unit 21, thereby being excited to produce more light of the desired color and further improving the color shift phenomenon.

[0062] In some embodiments, the orthographic projection of the chromaticity adjustment unit 31 onto the substrate 1 coincides with the center of the orthographic projection of the light-emitting pixel unit 21 onto the substrate 1.

[0063] The light emitted by the light-emitting pixel unit 21 is usually symmetrically diverged. In this embodiment, the color adjustment unit 31 is set to coincide with the orthographic projection center of the light-emitting pixel unit 21, so that the color adjustment unit 31 can better absorb the light from the corresponding light-emitting pixel unit 21, thereby further improving the color shift phenomenon.

[0064] In some embodiments, the chromaticity adjustment unit 31 has an absorption wavelength range and an emission wavelength range, wherein the emission wavelength range is greater than the absorption wavelength range and the two do not overlap.

[0065] The absorption wavelength range is the range of light wavelengths that the chromaticity adjustment unit 31 can absorb, and the emission wavelength range is the range of light wavelengths generated by the chromaticity adjustment unit 31 when excited. As can be seen from the foregoing, the chromaticity adjustment unit 31 can be excited to generate light corresponding to the desired color, therefore the emission wavelength range is the range of light wavelengths of the desired color, i.e., the desired wavelength.

[0066] Unlike traditional quantum dot films, which absorb and convert the light emitted by a single-color light-emitting pixel unit 21 into other colors (e.g., absorbing the light emitted by the blue light-emitting pixel unit 22 and converting it into red or green light), in this embodiment, the color of the light emitted by the corresponding light-emitting pixel unit 21 is the same as the color of the light generated by the colorimetric adjustment unit 31 after excitation. Furthermore, the emission wavelength range and absorption wavelength range do not overlap. This design ensures that the light emitted by the light-emitting device within its emission wavelength range (i.e., the desired color) has a high transmittance at the colorimetric adjustment unit 31 and is not converted by it.

[0067] The low-energy light emitted by the light-emitting pixel unit 21 in this embodiment, i.e., the light of the desired color, has a high transmittance at the corresponding color adjustment unit 31, and thus exits the display panel directly. This design can reduce the conversion rate of the color adjustment unit 313 to light near the desired color, thereby increasing the brightness of the light emitted by the display panel.

[0068] In some embodiments, please refer to Figure 4The plurality of light-emitting pixel units 21 include a blue pixel unit 22 that emits blue light, and the plurality of chromaticity adjustment units 31 include a blue chromaticity adjustment unit 312 that emits blue light when excited, and a non-blue chromaticity adjustment unit that emits red or green light when excited.

[0069] The blue pixel unit 22 corresponds to the blue chromaticity adjustment unit 312. The blue chromaticity adjustment unit 312 and the blue pixel unit 22 have a first ratio in their projected areas on the substrate 1. The non-blue chromaticity adjustment unit 31 and the corresponding light-emitting pixel unit 21 have a second ratio in their projected areas on the substrate 1. The first ratio is greater than the second ratio.

[0070] The blue pixel unit 22 has a higher luminous energy than the other color luminous pixel units 21. In addition to emitting photons when returning to the ground state, it may also cause some chemical bonds to break when excited. Therefore, the internal material of the blue pixel unit 22 is prone to fission, which leads to a short service life.

[0071] In this embodiment, in order to balance the lifespan of the blue pixel unit 22, the chromaticity adjustment unit 31 is compensated accordingly during its design, so that the ratio of the projected area of ​​the blue chromaticity adjustment unit 312 to the blue pixel unit 22 on the substrate 1 is larger than the ratio of the projected area of ​​the non-blue pixel unit 22, that is, the outer size of the blue chromaticity adjustment unit 312 is larger, thereby achieving the compensation effect.

[0072] In some embodiments, such as Figure 3 As shown, the chromaticity adjustment layer 3 also includes a light blocking layer 32, which includes a plurality of openings 321 extending along its own thickness direction, and the chromaticity adjustment unit 31 is located within the openings 321.

[0073] The light-blocking layer 32 includes multiple openings 321. The orthographic projection of the openings 321 onto the substrate 1 overlaps with the orthographic projection of the color adjustment unit 31 onto the substrate 1. The openings 321 are configured to limit the relative position of the color adjustment unit 31. Optionally, the display panel also includes a pixel definition layer, which includes multiple pixel openings. Each light-emitting pixel unit 21 is located within a pixel opening, wherein the orthographic projection of the openings 321 of the light-blocking layer 32 onto the substrate 1 covers the orthographic projection of the pixel openings onto the substrate 1.

[0074] In addition, the light blocking layer 32 is also used to reduce the risk of light crosstalk between adjacent light-emitting pixel units 21. The thickness of the light blocking layer 32 and the chromaticity adjustment unit 31 can be determined according to the actual situation. This application embodiment does not limit this, as long as the thickness of the light blocking layer 32 located between adjacent chromaticity adjustment units 31 can be greater than the thickness of the corresponding two adjacent chromaticity adjustment units 31.

[0075] In this embodiment, the chroma adjustment layer 3 includes a light-blocking layer 32. The light-blocking layer 32 forms multiple openings 321 for accommodating the chroma adjustment units 31. The size of the openings 321 in the light-blocking layer 32 is larger than the size of the pixel openings, so that each chroma adjustment unit 31 can cover the corresponding light-emitting pixel unit 21. At the same time, the light-blocking layer 32 can also reduce the risk of light crosstalk between adjacent light-emitting pixel units 21 and improve the display effect.

[0076] In some embodiments, the light-blocking layer 32 comprises an opaque material that blocks light from passing through, allowing light to travel only through the color adjustment unit 31 to the outside of the display panel. Optionally, the light-blocking layer 32 may comprise a black matrix material, a white opaque photoresist material, or some metallic material, etc.

[0077] In some embodiments, the color adjustment unit 31 includes a plurality of quantum dot materials, and the number of quantum dot materials gradually increases in the direction from the center of the color adjustment unit 31 to the edge of the color adjustment unit 31.

[0078] As can be seen from the foregoing, as the emission angle of the light emitted by the light-emitting pixel unit 21 increases, the wavelength of the light will shift towards a shorter wavelength. The shortening of the wavelength will cause a deviation in the color of the light, resulting in a color shift phenomenon. Therefore, the larger the emission angle, the more serious the color shift problem. At the same time, the larger the emission angle, the easier it is for the light to move to the vicinity of the edge position of the color adjustment unit 31.

[0079] Based on this, the embodiment of this application sets the amount of quantum dot material to gradually increase from the center of the color adjustment unit 31 to the edge of the color adjustment unit 31, so that there can be more quantum dot material near the edge of the color adjustment unit 31, further improving the color shift problem.

[0080] In some embodiments, the concentration of quantum dot material gradually increases in the direction from the center of the colorimetric adjustment unit 31 to the edge of the colorimetric adjustment unit 31.

[0081] In order to enable more quantum dot materials to be gathered near the edge of the color adjustment unit 31, the concentration of quantum dot materials in this embodiment is changed so that the concentration of quantum dot materials at the edge is greater than that at the center, thereby making the number of quantum dots at the edge greater than that at the center.

[0082] Furthermore, the concentration of quantum dot material can be set in a gradient direction perpendicular to the thickness of substrate 1. For example, the concentration of quantum dot material gradually increases in the direction from substrate 1 to light-emitting device layer 2.

[0083] In some embodiments, please refer to Figure 5 The thickness of the chromaticity adjustment unit 31 gradually increases from the center of the chromaticity adjustment unit 31 to its edge.

[0084] The shape of the color adjustment unit 31 in this application embodiment has been improved so that the edge position of the color adjustment unit 31 can have a greater thickness, that is, more quantum dot materials can be disposed near the edge position of the color adjustment unit 31 than at the center position, so as to meet the distribution requirements of quantum dot materials.

[0085] In some embodiments, such as Figure 5 As shown, the chromaticity adjustment unit 31 is recessed on the surface of the substrate 1 away from the light-emitting device layer 2 to form a receiving groove 311. The chromaticity adjustment layer 3 also includes a light control part 33 for adjusting the direction of the light emitted from the light-emitting pixel unit 21. The light control part 33 is located in the receiving groove 311.

[0086] The chromaticity adjustment unit 31 is provided with a receiving groove 311. The receiving groove 311 is provided to meet the requirement that the thickness of the chromaticity adjustment unit 31 gradually increases from the center of the chromaticity adjustment unit 31 to the edge of the chromaticity adjustment unit 31. At the same time, the receiving groove 311 is also used to accommodate the light control unit 33. The light control unit 33 does not contain quantum dot material. Depending on the actual needs, the light control unit 33 includes different materials and performs effects such as light extraction, light focusing, or light divergence.

[0087] The light control unit 33 is located within the receiving groove 311, and the shape of the light control unit 33 depends on the shape of the receiving groove 311. Specifically, in... Figure 5 The diagram shows the case where the cross-section of the light control unit 33 is semi-circular. It is understood that the shape of the light control unit 33 can be changed according to actual needs, making its cross-section trapezoidal or irregular, etc., and this application embodiment does not impose such limitations.

[0088] In some embodiments, please refer to Figure 5 and Figure 6 The receiving groove 311 includes a bottom wall 3111, which is formed by protruding in a direction away from or close to the substrate 1 and is curved.

[0089] like Figure 5 As shown, when the bottom wall 3111 protrudes in a direction away from the substrate 1, the surface of the light control part 33 facing the bottom wall 3111 is shaped like a convex lens. This design can achieve the function of light focusing; as Figure 6 As shown, when the bottom wall 3111 protrudes along the direction close to the substrate 1, the surface of the light control part 33 facing the bottom wall 3111 is shaped like a concave lens. This design can play the role of light diffusion.

[0090] In some embodiments, such as Figure 6 As shown, the display panel also includes an encapsulation layer 4 located between the color adjustment layer 3 and the light-emitting device layer 2, and the light control part has a different refractive index from the encapsulation layer 4.

[0091] The encapsulation layer 4 is used to encapsulate the display panel, preventing external moisture and other contaminants from entering the light-emitting device layer 2 and affecting the lifespan of the light-emitting pixel unit 21. In this embodiment, the refractive index of the encapsulation layer 4 and the light control unit are set to be different, so that the light control unit 33 can change the propagation path of the light emitted from the light-emitting pixel unit 21 and passing through the encapsulation layer 4, allowing it to enter the color adjustment unit 31 better, thereby achieving a better display effect.

[0092] In some embodiments, please refer to Figure 1 and Figure 7 The display panel includes a fingerprint recognition area FA and a display area AA surrounding the fingerprint recognition area FA. The orthogonal projection area of ​​the color adjustment unit 31 located in the fingerprint recognition area FA on the substrate 1 is larger than the orthogonal projection area of ​​the color adjustment unit 31 of the corresponding color located in the display area AA on the substrate 1.

[0093] The fingerprint recognition area FA is used to identify fingerprints, and it is usually surrounded by the display area AA. Under normal circumstances, both the fingerprint recognition area FA and the display area AA can be used to display images, and their brightness is consistent. However, during fingerprint recognition, the fingerprint recognition area FA needs to operate in a high-brightness mode, and the light-emitting pixel units 21 in the fingerprint recognition area FA will emit brighter light. This results in the lifespan of the light-emitting pixel units 21 in the fingerprint recognition area FA being shorter than that of the display area AA.

[0094] As can be seen from the foregoing, the lifespan compensation effect of different light-emitting pixel units 21 can be achieved by adjusting the size of the chromaticity adjustment unit 31. Similarly, in this embodiment, the size of the chromaticity adjustment unit 31 in the fingerprint recognition area FA is set to be larger than the size of the chromaticity adjustment unit 31 of the corresponding color in the display area AA, so as to achieve the compensation effect of the light-emitting pixel units 21 in the fingerprint recognition area FA.

[0095] Secondly, please refer to Figure 8 and Figures 9a-9b This application provides a method for manufacturing a display panel, including:

[0096] S100: A light-emitting device layer is formed on the substrate, the light-emitting device layer including multiple light-emitting pixel units.

[0097] Please see Figure 9aIn step S100, the light-emitting device layer 2 is formed on one side of the substrate 1. The light-emitting device layer 2 includes a plurality of different light-emitting pixel units 21. For example, the light-emitting device layer 2 may include a green light-emitting pixel unit for emitting green light, a blue light-emitting pixel unit for emitting blue light, and a red light-emitting pixel unit for emitting red light.

[0098] S110: A colorimetric adjustment layer is formed on the side of the light-emitting device layer away from the substrate. The colorimetric adjustment layer includes multiple colorimetric adjustment units.

[0099] Please see Figure 9b In step S110, the chromaticity adjustment layer 3 and the light-emitting device layer 2 are formed on the same side of the substrate 1. Light emitted from the organic light-emitting pixel 21 illuminates the chromaticity adjustment unit 31, exciting it to emit light of the same color in the direction opposite to the light-emitting device 2 from the chromaticity adjustment layer 3. The luminous energy of the chromaticity adjustment unit 31 is not greater than the luminous energy of the light-emitting pixel unit 21.

[0100] In this embodiment, the chromaticity adjustment unit 31 is configured to absorb the lower wavelength light emitted by the corresponding light-emitting pixel unit 21 at a larger emission angle, i.e., light with a large chromaticity deviation, and be excited to generate light corresponding to the desired color, thereby optimizing the color gamut and improving the color shift phenomenon. At the same time, the emission direction of the chromaticity adjustment unit 31 is more divergent than that of the light-emitting pixel unit 21, which can also improve the viewing angle characteristics.

[0101] In some embodiments, please refer to Figure 10 and Figures 11a-11b Step S110 includes:

[0102] S111: Multiple light control sections are formed on the side of the light-emitting device layer away from the substrate.

[0103] Please see Figure 11a In step S111, the light control unit 33 is used to change the light propagation path, thereby achieving effects such as light extraction and light focusing. Optionally, the surface of the light control unit 33 facing away from the substrate 1 can be set into a shape similar to a convex lens, so that the light control unit 33 can perform the function of light focusing. At the same time, a light blocking layer 32 can be formed on the side of the light-emitting device layer 2 facing away from the substrate 1. The light blocking layer 32 includes a plurality of openings formed through it along the thickness direction, and the light control unit 33 is located in the openings.

[0104] S112: A chromaticity adjustment unit is formed on the side of the light control unit away from the substrate. The chromaticity adjustment unit covers the light control unit. The thickness of the chromaticity adjustment unit gradually increases from the center of the chromaticity adjustment unit to the edge of the chromaticity adjustment unit.

[0105] Please see Figure 11bIn step S112, the number and position of the chromaticity adjustment unit 31 and the light control unit 33 are correspondingly arranged, and the chromaticity adjustment unit 31 covers the light control unit 33. Optionally, the side of the chromaticity adjustment unit 31 facing away from the substrate 1 is parallel to the substrate 1. As the emission angle of the light emitted by the light-emitting pixel unit 21 increases, the wavelength of the light will shift towards a shorter wavelength. The shortening of the wavelength will cause a deviation in the chromaticity of the light, resulting in a color shift phenomenon. Therefore, the larger the emission angle, the more serious the color shift problem. At the same time, the larger the emission angle, the easier it is for the light to move to the vicinity of the edge position of the chromaticity adjustment unit 31. Therefore, in this embodiment, the chromaticity adjustment unit 31 is set to be thicker at the edges and thinner in the middle, so that more quantum dot material can be placed at the edge position of the chromaticity adjustment unit 31, thereby further improving the color shift problem.

[0106] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0107] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting device layer is located on one side of the substrate, and the light-emitting device layer includes a plurality of light-emitting pixel units; A chromaticity adjustment layer is located on the side of the light-emitting device layer opposite to the substrate, and the chromaticity adjustment layer includes a plurality of chromaticity adjustment units; The light emitted by the light-emitting pixel unit illuminates the color adjustment unit, exciting the color adjustment unit to emit light of the same color in the direction opposite to the light-emitting device layer of the color adjustment layer; the light emission energy of the color adjustment unit is not greater than the light emission energy of the light-emitting pixel unit; Wherein, the orthographic projection of the light-emitting pixel unit on the substrate and the orthographic projection of the corresponding colorimetric adjustment unit on the substrate at least partially overlap, the colorimetric adjustment unit includes a plurality of quantum dot materials, and the number of quantum dot materials gradually increases in the direction from the center of the colorimetric adjustment unit to the edge of the colorimetric adjustment unit.

2. The display panel according to claim 1, characterized in that, The orthographic projection of each of the light-emitting pixel units onto the substrate lies within the orthographic projection of each of the chromaticity adjustment units onto the substrate.

3. The display panel according to claim 2, characterized in that, The center of the chromaticity adjustment unit projected onto the substrate coincides with the center of the light-emitting pixel unit projected onto the substrate.

4. The display panel according to any one of claims 1 to 3, characterized in that, The color adjustment unit has an absorption wavelength range and an emission wavelength range, wherein the emission wavelength range is greater than the absorption wavelength range and the two do not overlap.

5. The display panel according to claim 4, characterized in that, The plurality of light-emitting pixel units include a blue pixel unit that emits blue light, and the plurality of chromaticity adjustment units include a blue chromaticity adjustment unit that is excited to emit blue light and a non-blue chromaticity adjustment unit that is excited to emit red or green light. The blue pixel unit corresponds to the blue chromaticity adjustment unit. The blue chromaticity adjustment unit and the blue pixel unit have a first ratio in the projected area on the substrate. The non-blue chromaticity adjustment unit and the corresponding light-emitting pixel unit have a second ratio in the projected area on the substrate. The first ratio is greater than the second ratio.

6. The display panel according to any one of claims 1 to 3, characterized in that, The chromaticity adjustment layer further includes a light-blocking layer, which includes multiple openings extending along its thickness direction, and the chromaticity adjustment unit is located within the openings.

7. The display panel according to claim 6, characterized in that, The light-blocking layer comprises an opaque material.

8. The display panel according to claim 1, characterized in that, The concentration of the quantum dot material gradually increases in the direction from the center of the colorimetric adjustment unit to its edge.

9. The display panel according to claim 1, characterized in that, The thickness of the chromaticity adjustment unit gradually increases in the direction from the center of the chromaticity adjustment unit to its edge.

10. The display panel according to claim 1, characterized in that, The chromaticity adjustment unit is recessed on the surface of the substrate in a direction away from the light-emitting device layer to form a receiving groove. The chromaticity adjustment layer also includes a light control unit for adjusting the direction of the light emitted by the light-emitting pixel unit, and the light control unit is located in the receiving groove.

11. The display panel according to claim 10, characterized in that, The receiving groove includes a bottom wall that is curved and protrudes in a direction away from or close to the substrate.

12. The display panel according to claim 10, characterized in that, The display panel further includes an encapsulation layer located between the chromaticity adjustment layer and the light-emitting device layer, wherein the light control unit has a different refractive index from the encapsulation layer.

13. The display panel according to claim 1, characterized in that, The display panel includes a fingerprint recognition area and a display area surrounding the fingerprint recognition area. The orthographic projection area of ​​the color adjustment unit located in the fingerprint recognition area on the substrate is larger than the orthographic projection area of ​​the color adjustment unit for the corresponding color located in the display area on the substrate.

14. A method for manufacturing a display panel, characterized in that, include: A light-emitting device layer is formed on a substrate, the light-emitting device layer comprising a plurality of light-emitting pixel units; A chromaticity adjustment layer is formed on the side of the light-emitting device layer opposite to the substrate, and the chromaticity adjustment layer includes a plurality of chromaticity adjustment units; The light emitted by the light-emitting pixel unit illuminates the color adjustment unit, exciting the color adjustment unit to emit light of the same color in the direction opposite to the light-emitting device layer of the color adjustment layer; the light emission energy of the color adjustment unit is not greater than the light emission energy of the light-emitting pixel unit.

15. The preparation method according to claim 14, characterized in that, The step of forming a color adjustment layer on the side of the light-emitting device layer opposite to the substrate includes: Multiple light modulation sections are formed on the side of the light-emitting device layer opposite to the substrate; The chromaticity adjustment unit is formed on the side of the light control section away from the substrate. The chromaticity adjustment unit covers the light control section. The thickness of the chromaticity adjustment unit gradually increases from the center of the chromaticity adjustment unit to the edge of the chromaticity adjustment unit.

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