WO2020220792A1 - Display panel and manufacturing method for display panel - Google Patents

Abstract

A display panel and a manufacturing method for the display panel, the display panel comprising a pixel unit. The pixel unit comprises a first color sub-pixel unit. The first color sub-pixel unit comprises: a first light-emitting element configured to emit main color light within a first wavelength range; a first light conversion layer provided on a light emission side of the first light-emitting element and configured to receive at least a part of the main color light to emit first color light, the wavelength range of the first color light being different from the first wavelength range of the main color light; and a reflective material configured to reflect at least the other part of the main color light and provided in at least one of the following positions: the light emission side of the first light conversion layer and the first light conversion layer.

Description

Display panel and manufacturing method of display panel

This application claims the priority of the Chinese patent application No. 201910360104.6 filed on April 30, 2019, and the contents of the above-mentioned Chinese patent application are quoted here in full as a part of this application.

Technical field

The present disclosure relates to a display panel and a manufacturing method of the display panel.

Background technique

Organic Light-Emitting Diode (OLED) display technology has become the current mainstream display technology. The market increasingly needs OLED display panels with high color gamut, high luminous efficiency, and large size.

Summary of the invention

At least one embodiment of the present disclosure provides a display panel including a pixel unit. The pixel unit includes a first color sub-pixel unit. The first color sub-pixel unit includes: a first light-emitting element configured to emit main color light in a first wavelength range; a first light conversion layer provided on the light-emitting side of the first light-emitting element and configured to receive At least a part of the main color light emits a first color light, the wavelength range of the first color light is different from the first wavelength range of the main color light; and a reflective material configured to reflect the main color light At least another part of the colored light is provided in at least one of the following positions: the light exit side of the first light conversion layer and in the first light conversion layer.

For example, according to some embodiments of the present disclosure, the main color light is blue light. Moreover, the reflection wavelength of the reflective material is within the range of 405-480 nm.

For example, according to some embodiments of the present disclosure, the main color light is blue light. In addition, the reflective material is cholesteric liquid crystal, and the cholesteric liquid crystal reflects blue circularly polarized light.

For example, according to some embodiments of the present disclosure, the pitch of the cholesteric liquid crystal is in the range of 230-350 nm, and the optical anisotropy of the cholesteric liquid crystal is in the range of 0.12-0.22.

For example, according to some embodiments of the present disclosure, the reflective material is wrapped in a polymer membrane capsule.

For example, according to some embodiments of the present disclosure, the particle size of the polymer membrane capsule is in the range of 0.5-5 μm.

For example, according to some embodiments of the present disclosure, the reflective material has left-handed characteristics or right-handed characteristics or both left-handed characteristics and right-handed characteristics.

For example, according to some embodiments of the present disclosure, the first color sub-pixel unit further includes: a first color filter layer disposed on the light exit side of the first light conversion layer and configured to allow at least a portion of the first color light Part of the transmission.

For example, according to some embodiments of the present disclosure, the reflective material is dispersed in the first color filter layer.

For example, according to some embodiments of the present disclosure, the first color filter layer includes a plurality of first color filter sublayers, and the reflective material is at least dispersed in the first color filter layer closest to the first color filter layer. A light conversion layer in the first color filter sublayer.

For example, according to some embodiments of the present disclosure, the first light conversion layer includes a plurality of first quantum dots configured to be excited by at least a part of the main color light to emit a first color Light.

For example, according to some embodiments of the present disclosure, the first color sub-pixel unit further includes: a first transparent resin layer disposed on the light exit side of the first light conversion layer and the reflective material is dispersed in the first transparent resin layer .

For example, according to some embodiments of the present disclosure, the pixel unit further includes a second color sub-pixel unit. The second color sub-pixel unit includes: a second light-emitting element configured to emit main color light in the first wavelength range; a second light conversion layer disposed on the light-emitting side of the second light-emitting element, and Receiving at least a part of the main color light to emit a second color light, the wavelength range of the second color light is different from the first wavelength range of the main color light; and the reflective material can reflect the At least another part of the main colored light is provided in at least one of the following positions: the light exit side of the second light conversion layer and in the second light conversion layer.

For example, according to some embodiments of the present disclosure, the third colored light is blue light, one of the first colored light and the second colored light is green light, and the first colored light and the second colored light are The other of the colored lights is red light.

For example, according to some embodiments of the present disclosure, the pixel unit further includes: a third color sub-pixel unit. The third color sub-pixel unit includes: a third light-emitting element configured to emit main color light in a first wavelength range; and a third transparent resin layer disposed on the light-emitting side of the third light-emitting element.

For example, according to some embodiments of the present disclosure, the third transparent resin layer is dispersed with a plurality of scattering particles.

For example, according to some embodiments of the present disclosure, the first color sub-pixel unit further includes a first transparent resin layer disposed on the light exit side of the first light conversion layer, and the second color sub-pixel unit further includes On the second transparent resin layer on the light exit side of the second light conversion layer, the first transparent resin layer, the second transparent resin layer, and the third transparent resin layer are formed as an integral transparent resin layer.

For example, according to some embodiments of the present disclosure, the reflective material is dispersed in the overall transparent resin layer.

For example, according to some embodiments of the present disclosure, each of the plurality of pixel units further includes: a first encapsulation layer covering the first light emitting element, the second light emitting element, and the third light emitting element, so The first light conversion layer, the second light conversion layer, and the third light conversion layer are disposed on the first encapsulation layer.

For example, according to some embodiments of the present disclosure, the pixel unit further includes a black matrix. The black matrix includes matrix bars. The matrix bar is arranged on the first encapsulation layer and arranged on one of the adjacent two of the first color sub-pixel unit, the second color sub-pixel unit, and the third color sub-pixel unit between.

For example, according to some embodiments of the present disclosure, the display panel further includes a substrate. The substrate is provided with an array driving circuit. The array driving circuit includes a first pixel driving circuit, a second pixel driving circuit, and a third pixel driving circuit in the pixel unit, which are used to drive the first light-emitting element, the second light-emitting element, and the The third light-emitting element. The first light-emitting element, the second light-emitting element, and the third light-emitting element are provided on the substrate.

At least one embodiment of the present disclosure provides a manufacturing method of a display panel, the manufacturing method including: forming a first light emitting element; forming a first light conversion layer on a light exit side of the first light emitting element; and providing a reflective material. The first light-emitting element is configured to emit main color light in a first wavelength range. The first light conversion layer is configured to receive at least a part of the main color light to emit a first color light, and the wavelength range of the first color light is different from the first wavelength range of the main color light. The reflective material is configured to reflect at least another part of the main color light, and is arranged in at least one of the following positions: the light exit side of the first light conversion layer and the first light conversion layer.

For example, according to some embodiments of the present disclosure, the first light emitting element is formed on a first substrate, and the first light conversion layer is formed on a second substrate. The manufacturing method further includes: opposing and bonding the first substrate and the second substrate, so that the first light conversion layer and the first light-emitting element are aligned.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show certain embodiments of the present disclosure, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative work.

FIG. 1 shows a pixel unit of a display panel according to at least one embodiment of the present disclosure;

FIG. 2A shows the change in refractive index of a reflective material with temperature according to at least one embodiment of the present disclosure;

FIG. 2B shows the half-value width, pitch and optical anisotropy of the reflected blue light of the reflective material according to at least one embodiment of the present disclosure;

3A-3F show a polymer membrane capsule wrapped with a reflective material according to at least one embodiment of the present disclosure;

Fig. 4 shows an exemplary view of a first light emitting element and a substrate according to at least one embodiment of the present disclosure;

FIG. 5 shows a pixel unit of a display panel according to another embodiment of the present disclosure;

FIG. 6 shows a pixel unit of a display panel according to another embodiment of the present disclosure;

FIG. 7 shows a method of manufacturing a display panel according to at least one embodiment of the present disclosure;

8A-8B show views of the pixel unit at a stage in the manufacturing method shown in FIG. 7;

FIG. 9 shows a method of manufacturing a display panel according to another embodiment of the present disclosure;

10A to 10C show views of the pixel unit at a stage in the manufacturing method shown in FIG. 9.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the protection scope of the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity, or importance, but are only used to distinguish different components. "Include" or "include" and other similar words mean that the element or item appearing before the word encompasses the element or item listed after the word and its equivalents, but does not exclude other elements or items. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

The RGB-type OLED display panel has the characteristic of high color gamut. However, because the FMM (FINE Metal Mask) is required to vaporize organic materials in the manufacturing process, the OLED display panel cannot be enlarged. If the OLED display panel adopts the CF+WOLED (color filter + white light OLED) scheme to achieve color display, the OPEN MASK can be used in the preparation process to vaporize organic materials, which will help realize large-size OLED displays Panel, but the color gamut of the color filter used limits the color gamut of the OLED display panel, which may affect the display effect.

At least one embodiment of the present disclosure provides a display panel including a pixel unit. The pixel unit includes a first color sub-pixel unit. The first color sub-pixel unit includes a first light-emitting element, a first light conversion layer, and a reflective material. The first light-emitting element is configured to emit main color light in the first wavelength range. The first light conversion layer is disposed on the light exit side of the first light-emitting element, and is configured to receive at least a part of the main color light to emit the first color light, and the wavelength range of the first color light is different from the first wavelength range of the main color light. The reflective material is configured to reflect at least another part of the main color light, and is disposed in at least one of the following positions: the light exit side of the first light conversion layer and the first light conversion layer.

In an embodiment of the present disclosure, the first light conversion layer converts the main color light into a first color light different from the main color light. By appropriately disposing the first light conversion layer in the display panel, the conversion can help to improve the color purity of the first color light emitted by the display panel, thereby improving the color purity of the first color sub-pixel unit. The pixel unit including the first color sub-pixel unit with high color purity correspondingly has a wider color gamut, and further, the display panel has a wider color gamut and has a better display effect.

In an embodiment of the present disclosure, the reflective material may reflect at least another part of the main color light. That is, the reflection wavelength of the reflective material at least partially overlaps with the first wavelength of the main color light emitted by the first light-emitting element. Therefore, the light not converted by the first light-to-light conversion layer can be reflected by the reflective material back to the first light conversion layer, thereby improving the light conversion efficiency, and reducing the light not being converted by the first light-to-light conversion layer (that is, from The main color light emitted by the first color sub-pixel unit has an adverse effect on the color purity of the first color sub-pixel unit.

FIG. 1 shows a schematic diagram of a pixel unit 100 of a display panel according to at least one embodiment of the present disclosure. As shown in FIG. 1, the display panel includes a pixel array including a plurality of pixel units 100 arranged in an array. The pixel unit 100 includes a first color sub-pixel unit 110, a second color sub-pixel unit 120, and a third color sub-pixel unit. The color sub-pixel unit 130, whereby the display panel can realize color display. Although only one pixel unit 100 is shown in FIG. 1, it can be understood that the structure of other pixel units 100 is the same or similar to it, and therefore will not be repeated.

In this embodiment, the first color sub-pixel unit 110 may include a first light emitting element 111, a first light conversion layer 112, a first color filter layer 113, and a reflective material 140.

The first light emitting element 111 is configured to emit main color light in a first wavelength range, for example, blue light in the first wavelength range. For example, the first light-emitting element 111 may be a blue OLED; in other embodiments, the first light-emitting element 111 may also be an inorganic light-emitting diode (LED), mini-LED (mini-LED), quantum dot light-emitting diode (QLED), etc., The embodiments of the present disclosure do not limit this. In the following description, the first light-emitting element 111 and other light-emitting elements are OLEDs as an example. For example, the center wavelength of the first wavelength range may be in the range of 405-480 nm, for example, in the range of 430-470 nm.

The first light conversion layer 112 is disposed on the light emitting side of the first light emitting element 111. For example, in the case where the first light emitting element 111 is an OLED with a top emission structure, as shown in FIG. 1, the first light conversion layer 112 may be disposed on the first light emitting element 111. The first light conversion layer 112 is configured to receive at least a part of the main color light, perform light conversion, and convert the part of the main color light into a first color light different from the main color light (that is, the wavelength range of the first color light) The wavelength range is different from the main color light), and the first color light different from the main color light is emitted to the light exit side.

For example, in this embodiment, the first light conversion layer 112 may include a plurality of first quantum dots (not shown), and the plurality of first quantum dots are configured to be the main color light emitted by the first light-emitting element 111. At least a portion is excited to emit the first colored light. For example, the first light conversion layer 112 may include a transparent resin, and a plurality of first quantum dots are dispersed in the transparent resin. The transparent resin may be, for example, an organic polymer material, such as acrylic resin, polyimide resin, polysiloxane resin, epoxy resin, fluorene resin, and the like.

The quantum dot may be a low-dimensional semiconductor material, and its three dimensions are not more than twice the exciton Bohr radius of the corresponding semiconductor material.

The quantum dot may have a Stokes shift. Therefore, the wavelength of the main color light that excites the first quantum dot is smaller than the wavelength of the first color light generated by the excitation of the first quantum dot. For example, in this embodiment, the main color light may be blue light, and the first color light may be red light. In addition, the wavelength of the light generated by the excitation of the quantum dot is related to the particle size of the quantum dot, that is, the nano-confinement effect. Generally, the larger the particle size of the quantum dot, the greater the red shift of the first color light relative to the main color light.

Quantum dots can have a broad excitation spectrum and a narrow emission spectrum. Therefore, the first quantum dots can absorb more light and emit light with greater color purity, which is beneficial to improve the color gamut of the display panel.

In another embodiment, the first light conversion layer 112 may include a fluorescent material. For example, the first light conversion layer 112 may include a transparent resin, and the fluorescent material is dispersed in the transparent resin. The fluorescent material can absorb the main color light and emit the first color light of different wavelengths outward. The fluorescent material can be made of metal (zinc, chromium) sulfide or rare earth oxide and a trace amount of active agent after calcination. Alternatively, the fluorescent material is, for example, small organic molecules or organic polymers with conjugated heterocycles and various chromophores.

In another embodiment, the first light conversion layer 112 may include a down-conversion luminescent material. Also, for example, the first light conversion layer 112 may include a transparent resin, the down-conversion luminescent material is dispersed in the transparent resin, and the down-conversion luminescent material can absorb the main color light and emit the first color light of different wavelengths outward.

The first color filter layer 113 may be disposed on the light exit side of the first light conversion layer 112, and may be configured to allow at least a part of the first color light generated by the first light conversion layer 112 to be transmitted, thereby improving the transmission from the first color light. The color purity of the first color light emitted by the sub-pixel unit 110. For example, the first color light may be red light, and the first color filter layer 113 allows at least a part of the red light generated by the first light conversion layer 112 to transmit, thereby improving the first color emitted from the first color sub-pixel unit 110 The color purity of light.

For example, the first color filter layer 113 may be a colored resin, including a transparent resin material and a plurality of first colored particles dispersed in the transparent resin material. The first colored particles may be red pigments or dyes. As described above, the use of the first color filter layer 113 is beneficial to improve the color purity of the first color light emitted by the first color sub-pixel unit 110. However, in other embodiments, if the color purity of the first color light generated by the first light conversion layer 112 is already high, the first color filter layer 113 may be omitted.

For example, the first light conversion layer 112 may only receive a part of the main color light, thereby emitting the first color light different from the main color light. Another part of the main color light that is not received and converted by the first light conversion layer 112 may be transmitted through the first light conversion layer 112. Therefore, not all the main color light is utilized by the first light conversion layer 112. In addition, although in the case of providing the first color filter layer 113, the first color filter layer 113 will also filter or block part of the main color light used by the first light conversion layer 112, but if it is not The main color light received and converted by the light conversion layer 112 is still transmitted to the outside of the display panel, and this part of the main color light may reduce the color purity of the first color sub-pixel unit 110.

Therefore, in order to improve the conversion efficiency of the main color light by the first light conversion layer, and prevent the main color light that is not converted by the first light conversion layer 112 from reducing the color purity of the first color sub-pixel unit 110, in the first color sub-pixel unit A reflective material 140 is provided in 110.

The reflective material 140 is configured to reflect at least a part of the main color light in the first wavelength range, and may be disposed on the light exit side of the first light conversion layer 112 or in the first light conversion layer 112.

The reflective material 140 can selectively reflect the main color light that has not been converted by the first light conversion layer 112 toward the first light conversion layer 112, so that the main color light that has not been converted by the first light conversion layer 112 can be again by the first light. The conversion layer 112 receives, thereby improving the efficiency of the main color light being converted by the first light conversion layer 112.

As shown in FIG. 1, in an example of this embodiment, the main color light is blue light, and the reflective material 140 is dispersed in the first color filter layer 113. For example, the reflection wavelength of the reflective material 140 is in the range of 405-480 nm. The first wavelength range and the reflection wavelength range should at least partially overlap, for example, the overlap range between the two exceeds 80% of the first wavelength range, or the two completely overlap. Further, the larger the overlapping range of the first wavelength range and the reflection wavelength range, the higher the reflection efficiency of the reflective material, and the more the conversion efficiency of the main color light is improved.

For example, the reflective material 140 may have left-handed characteristics or right-handed characteristics, or both left-handed characteristics and right-handed characteristics. For example, when the reflective material 140 has a left-handed characteristic, the reflective material 140 may reflect left-handed circularly polarized light. For example, when the reflective material 140 has a right-handed characteristic, the reflective material 140 may reflect right-handed circularly polarized light. When the reflective material 140 has both left-handed characteristics and right-handed characteristics, the reflective material 140 may reflect left-handed circularly polarized light and right-handed circularly polarized light.

For example, the reflective material 140 may include cholesteric liquid crystal, which can reflect blue circularly polarized light.

The cholesteric liquid crystal may be a natural cholesteric substance. Alternatively, the cholesteric liquid crystal may be a chiral nematic substance formed by adding a chiral substance to a nematic liquid crystal.

The pitch of the cholesteric liquid crystal may be in the range of 230-350nm, and the optical anisotropy of the cholesteric liquid crystal is, for example, in the range of 0.12-0.22, for example, in the range of 0.15-0.2, or, for example, In the range greater than 0.15. The clearing point of the cholesteric liquid crystal may be greater than 100°C.

FIG. 2A shows the change of the refractive index of a cholesteric liquid crystal to 436 nm light with temperature according to at least one embodiment of the present disclosure. In Figure 2A, the top line represents the e-ray refractive index Ne of the cholesteric liquid crystal, the bottom line represents the o-ray refractive index No of the cholesteric liquid crystal, and the middle line represents the optical refractive index of the cholesteric liquid crystal. Anisotropy △n.

For example, the reflection wavelength of the reflective material 140 (e.g., cholesteric liquid crystal) is proportional to the refractive index and proportional to the pitch.

2B shows the half-value width, the pitch and the optical anisotropy Δn of the reflection wavelength of the cholesteric liquid crystal according to at least one embodiment of the present disclosure. In FIG. 2B, five lines from top to bottom respectively represent the half-width-pitch curves of cholesteric liquid crystals with optical anisotropy Δn of 0.22, 0.2, 0.18, 0.15, and 0.12. It can be seen from FIG. 2B that the larger the pitch of the cholesteric liquid crystal, the larger the optical anisotropy, and the larger the half-width. The larger the half-width, the wider the reflection wavelength range of the cholesteric liquid crystal.

In some of the embodiments, the reflective material 140 may be wrapped in polymer membrane capsules, and these polymer membrane capsules are dispersed in the first color filter layer 113 or coated to form a single layer. The particle size of the polymer membrane capsule may be in the range of 0.5-5 μm, for example, 1-3 μm. Alternatively, the reflective material 140, for example, may be directly coated to form a reflective layer.

In the case where the reflective material 140 includes cholesteric liquid crystal, as an example, the method for manufacturing a polymer membrane sac wrapped with cholesteric liquid crystal is as follows.

First, cholesteric liquid crystal, isophorone diisocyanate (IPDI) and methylene chloride (CH2Cl2) are mixed in an appropriate weight ratio to obtain a mixed phase, and then the mixed phase is poured into deionized water and PVA1788 (8wt%) continuous water phase to form an oil/water emulsion. After that, emulsification is carried out for 10 minutes (min) at a certain emulsification rate using a stirrer. Then, add a certain volume of dibutyltin dilaurate (DBTDL) to the above-mentioned emulsion system, and stir for 6 hours (h) at 40°C for polymerization to produce cholesteric liquid crystals. The polymer membrane vesicle. After the polymerization, the polymer membrane sac containing the cholesteric liquid crystal is separated by vacuum filtration and washing with deionized water.

It is possible to prepare polymer membrane capsules encapsulating reflective materials with different properties. For example, FIGS. 3A-3F show a polymer membrane capsule wrapped with a reflective material according to an embodiment of the present disclosure. Figure 3A shows a first polymer reflective membrane capsule, which is wrapped with a left-handed reflective material with a first pitch (for example, cholesteric liquid crystal); Figure 3B shows a second polymer reflective membrane capsule, which is wrapped with Left-handed reflective material with a second pitch (for example, cholesteric liquid crystal), the second pitch is smaller than the first pitch; Figure 3C shows a third polymer reflective membrane capsule, which is wrapped with a left-handed with a third pitch Reflective material (for example, cholesteric liquid crystal), the third pitch is smaller than the second pitch; Figure 3D shows a fourth polymer reflective membrane capsule, which is wrapped with a right-handed reflective material with the first pitch (for example, bladder Steroidal liquid crystal); Figure 3E shows the fifth polymer reflective film capsule, which is wrapped with a right-handed reflective material with a second pitch (for example, cholesteric liquid crystal); Figure 3F shows the sixth polymer reflective film The membrane capsule is wrapped with a right-handed reflective material (for example, cholesteric liquid crystal) with a third pitch.

Reflective materials with different pitches have different peaks and half-widths of reflection wavelengths. For example, a variety of polymer capsules shown in FIGS. 3A to 3C may be dispersed in the first color filter layer 113. Compared to only one type of polymer capsule in FIGS. 3A to 3C, the multiple polymer capsules shown in FIGS. 3A to 3C have a larger reflection wavelength range for left-handed light. For example, a variety of polymer capsules shown in FIGS. 3A and 3E can be dispersed in the first color filter layer 113. Compared with only one type of polymer capsule in Figure 3A-Figure 3E, the multiple polymer capsules shown in Figure 3A-Figure 3E can reflect left-handed light and right-handed light, instead of just left-handed light and right-handed light. One of the light.

Different polymer membrane capsules can be dispersed into the first color filter layer 113 according to needs. For example, when a more divergent reflection wavelength for left-handed light is required, a variety of polymer capsules shown in FIGS. 3A-3C can be dispersed. For example, when a more convergent reflection wavelength for left-handed light is required, only one polymer capsule shown in FIG. 3A can be dispersed. For example, when more divergent reflection wavelengths for left-handed light and right-handed light are required, a variety of polymer capsules shown in FIGS. 3A-3F can be dispersed.

In other embodiments, for example, the first color sub-pixel unit 110 may include at least two (multi-layer) first color filter layers 113, that is, the first color filter layer 113 may include a plurality of first color filter sub-layers. . Compared with a single-layer structure, the multi-layer structure of the first color filter layer 113 is beneficial to further improve the color purity of the first color light emitted by the first color sub-pixel unit 110. For example, the reflective material 140 may be dispersed in a plurality of first color filter sublayers of the first color filter layer 113, or may be dispersed in a certain first color filter sublayer of the first color filter layer 113, for example, dispersed In the first color filter sublayer of the first color filter layer 113 closest to the first light conversion layer 112. Disposing the reflective material 140 closer to the first light conversion layer 112 is beneficial to improve the energy conversion efficiency. Of course, for example, the reflective material 140 may be dispersed in each of the first color filter sublayers in the first color filter layer 113.

In other embodiments, for example, the reflective material 140 may be dispersed in the first light conversion layer 112. Alternatively, the reflective material 140 may be dispersed in another additional transparent resin layer disposed above the first light conversion layer 112 shown in FIG. 1 (ie, the light exit side).

As shown in FIG. 1, each pixel unit 100 of the display panel further includes a second color sub-pixel unit 120.

Similar to the first color sub-pixel unit 110, the second color sub-pixel unit 120 may include a second light-emitting element 121, a second light conversion layer 122, a second filter layer, and a reflective material 140, and the foregoing description is also applicable.

The second light-emitting element 121 is also configured to emit main color light in the first wavelength range, for example, blue light in the first wavelength range. For example, the second light-emitting element 121 may also be a blue OLED, which is also described as an example below.

In this embodiment, the second color sub-pixel unit 120 may include a second light-emitting element 121, a second light conversion layer 122, a second color filter layer 123, and a reflective material 140.

The second light conversion layer 122 is disposed on the light exit side of the second light-emitting element 121. Similarly, for example, in the case where the second light-emitting element 121 is an OLED with a top emission structure, as shown in FIG. 1, the second light conversion layer 122 may be disposed Above the second light-emitting element 121. The second light conversion layer 122 is configured to receive a part of the main color light, perform light conversion, convert the part of the main color light into a second color light that is different from the main color light, and emit a light emission side different from the main color light. The second colored light of light. In this embodiment, the second colored light is green light.

For example, the second light conversion layer 122 may include a plurality of second quantum dots (not shown) configured to be excited by at least a part of the main color light emitted by the second light-emitting element 121 to emit the first Two colored lights. For example, the second light conversion layer 122 may include a transparent resin, and a plurality of second quantum dots are dispersed in the transparent resin. Likewise, in other embodiments, the second light conversion layer 122 may include a fluorescent material or a down conversion material, or the like.

For example, the first quantum dot and the second quantum dot may be semiconductor nanocrystalline materials such as InP or CdSe.

As mentioned above, the wavelength of the light generated by the excitation of the quantum dot is related to the particle size of the quantum dot. In this embodiment, the particle size of the first quantum dot may be in the range of 7-9nm, for example for emitting red light, and the particle size of the second quantum dot may be in the range of 5-7nm, for example, for emitting green light. Light.

The second color filter layer 123 may be disposed on the light exit side of the second light conversion layer 122, and may be configured to allow at least a part of the second color light generated by the second light conversion layer 122 to be transmitted, thereby improving the color The color purity of the second color light emitted by the sub-pixel unit 120. For example, in this embodiment, the second color filter layer 123 allows at least a part of the green light generated by the second light conversion layer 122 to transmit, thereby improving the color of the second color light emitted from the second color sub-pixel unit 120. purity.

For example, the second color filter layer 123 may be a colored resin, including a transparent resin material and a plurality of second colored particles dispersed in the transparent resin material. The second colored particles may be green pigments or dyes. The second color filter layer 123 is beneficial to improve the color purity of the second color light emitted by the second color sub-pixel unit 120. Similarly, in other embodiments, if the color purity of the second color light generated by the second light conversion layer 122 is already high, the second color filter layer 123 may be omitted.

For example, in this embodiment, the reflective material 140 of the second color sub-pixel unit 120 is the same as the reflective material 140 of the first color sub-pixel unit 110, and is dispersed in the second color filter layer 123. Similar to the first color sub-pixel unit 110, the reflective material 140 is wrapped in a polymer film capsule.

In other embodiments, for example, the second color sub-pixel unit 120 may include at least two (multi-layer) second color filter layers 123, that is, the second color filter layer 123 may include multiple second color filter sub-layers. . For example, the reflective material 140 may be dispersed in a plurality of second color filter sublayers of the second color filter layer 123, or may be dispersed in a certain second color filter sublayer of the first color filter layer 113, for example, dispersed In the second color filter sublayer of the second color filter layer 123 closest to the second light conversion layer 122. Of course, for example, the reflective material 140 may be dispersed in each second color filter sub-layer in the second color filter layer 123.

In other embodiments, for example, the reflective material 140 may be dispersed in the second light conversion layer 122. Alternatively, the reflective material 140 may be dispersed in another additional transparent resin layer, and the transparent resin layer is disposed above the second light conversion layer 122 shown in FIG. 1 (ie, the light exit side). The transparent resin layer of the second color sub-pixel unit 120 and the transparent resin layer of the first color sub-pixel unit 110 where the reflective material 140 is dispersed as described above can be formed as a complete resin layer. Therefore, the transparent resin layer of the second color sub-pixel unit 120 and the transparent resin layer of the first color sub-pixel unit 110 can be formed at the same time, thereby saving process steps.

As shown in FIG. 1, each pixel unit 100 of the display panel further includes a third color sub-pixel unit 130.

The third color sub-pixel unit 130 includes a third light-emitting element 131 and a third transparent resin layer 132.

The third light emitting element 131 is configured to emit main color light in the first wavelength range, for example, blue light in the first wavelength range. For example, the third light-emitting element 131 may be a blue OLED, which is also described as an example below.

The third transparent resin layer 132 is disposed on the light emitting side of the third light emitting element 131. In this embodiment, the third transparent resin layer 132 is disposed on the third light-emitting element 131.

At least a part of the main color light emitted by the third light emitting element 131 may be transmitted through the third transparent resin layer 132, whereby the third color sub-pixel unit 130 emits the main color light as the third color light.

In addition, in at least one example, scattering particles (not shown) may be dispersed in the third transparent resin layer 132. The scattering particles may be inorganic nanoparticles, such as nano-sized titanium dioxide, zirconium dioxide, and the like. The scattered particles disperse at least a part of the main color light emitted by the third light-emitting element 131, which can increase the viewing angle of the third color sub-pixel unit 130 (that is, the viewing angle of the display panel). The particle size of the scattering particles may be in the range of 60 to 300 nm, for example, 80 to 120 nm.

The reflective material 140 in the first color filter layer 113 of the first color sub-pixel unit 110 and the second color filter layer 123 of the second color sub-pixel unit 120 (for example, the cholesteric phase wrapped in a polymer membrane sac) The liquid crystal) may also have a scattering effect, thereby increasing the viewing angles of the first color sub-pixel unit 110 and the second color sub-pixel unit 120. In addition, in at least one example, scattering particles may also be dispersed in the first color filter layer 113 and the second color filter layer 123, thereby increasing the density of the first color sub-pixel unit 110 and the second color sub-pixel unit 120. The viewing angle, and these scattering particles may be the same as those used in the third color sub-pixel unit 130.

The third transparent resin layer 132 may be a transparent organic polymer material, such as acrylic resin, polyimide resin, polysiloxane resin, epoxy resin, fluorene resin, and the like.

In other embodiments, the third color sub-pixel unit 130 may further include a third color filter layer. The third color filter layer may be disposed on the light exit side of the third transparent resin layer 132 or replace the third transparent resin layer 130. The third color filter layer may be configured to allow at least a part of the main color light generated by the third light emitting element 131 to be transmitted, thereby improving the color purity of the main color light emitted from the third color sub-pixel unit 130. For example, in this embodiment, the third color filter layer may allow at least a part of the blue light generated by the third light emitting element 131 to be transmitted, thereby improving the color purity of the blue light emitted from the third color sub-pixel unit 130.

For example, the third color filter layer may be a colored resin, including a transparent resin material and a plurality of third colored particles dispersed in the transparent resin material. The third colored particles may be blue pigments or dyes.

In this embodiment, the first color sub-pixel unit 110, the second color sub-pixel unit 120, and the third color sub-pixel unit 130 respectively emit the first color light, the second color light, and the main color light, that is, red light and green light. Light and blue light, and thus RGB sub-pixel units are respectively obtained for color display.

Since the first light conversion layer 112 and the first color filter layer 113 are provided, the first color light has high color purity. Since the second light conversion layer 122 and the second color filter layer 123 are provided, the second color light has high color purity. Therefore, the first color sub-pixel unit 110, the second color sub-pixel unit 120, and the third color sub-pixel unit 130 have a wide color gamut.

Since the reflective material 140 is provided, the first color sub-pixel unit 110 and the second color sub-pixel unit 120 have high light conversion efficiency.

In addition, the first light-emitting element 111, the second light-emitting element 121, and the third light-emitting element 131 can be prepared by vacuum evaporation using OPEN MASK or blanket coating or printing on the entire surface. Use FMM for preparation. Therefore, the display panel of the above-described embodiment is advantageous in being manufactured to have a large size.

As shown in FIG. 1, the display panel may further include a substrate 150, a pixel defining layer 160, a first encapsulation layer 170, a black matrix 180, and a second encapsulation layer 190.

The substrate is provided with an array driving circuit. The array driving circuit includes a first pixel driving circuit, a second pixel driving circuit, and a third pixel driving circuit in the pixel unit, which are used to drive the first light emitting element 111, the second light emitting element 121, and the third light emitting element 131, respectively. For OLED display panels and QLED display panels, the substrate 150 may be an active TFT substrate, for example, an oxide semiconductor TFT oxide substrate, a low temperature polysilicon (LTPS) TFT substrate, an amorphous silicon (a-Si) TFT substrate, etc. For an inorganic LED display panel or a mini-LED display panel, the substrate 150 may be a silicon substrate in which a driving circuit is formed.

The first light emitting element 111, the second light emitting element 121, and the third light emitting element 131 and the pixel defining layer 160 are disposed on the substrate 150. The first light emitting element 111, the second light emitting element 121 and the third light emitting element 131 are arranged side by side with each other, for example. The pixel defining layer 160 is disposed between adjacent two of the first light emitting element 111, the second light emitting element 121, and the third light emitting element 131, and includes defining the first color sub-pixel unit 110 and the second color sub-pixel unit respectively 120 and the opening of the third color sub-pixel unit 130.

FIG. 4 shows an exemplary schematic diagram of the first light emitting element 111 and the substrate 150 according to an embodiment of the present disclosure. However, it should be understood that the structure shown in FIG. 4 is only an example, and does not constitute a limitation to the embodiment of the present disclosure.

As shown in FIG. 4, the substrate 150 may include a base 151, a buffer layer 152, a driving circuit layer (including thin film transistors, capacitors, etc.) on the buffer layer 152, and a planarization layer 159.

For each sub-pixel unit, for example, the driving circuit layer may include a pixel driving circuit. The basic pixel circuit used in an active matrix OLED (AMOLED) display panel is usually a 2T1C pixel circuit, that is, two TFT (Thin-film Transistor, Thin film transistor) and a storage capacitor Cs to achieve the basic function of driving the OLED to emit light. In an OLED display panel, the threshold voltage of the driving transistor in each pixel circuit may be different due to the manufacturing process, and the threshold voltage of the driving transistor may drift due to, for example, the influence of temperature changes. Therefore, the difference in the threshold voltage of each driving transistor may cause poor display (for example, uneven display), so the threshold voltage needs to be compensated. Therefore, other pixel circuits with compensation function are provided on the basis of the above-mentioned basic pixel circuit of 2T1C. The compensation function can be realized by voltage compensation, current compensation or hybrid compensation. The pixel circuit with compensation function can be 4T1C or 4T2C, etc. , I will not go into details here.

The thin film transistor shown in FIG. 4 may include an active layer 153, a gate insulating layer 154, a gate electrode 155, an interlayer insulating layer 156, a source and drain electrode (including a source electrode 157 and a drain electrode 158), and the drain electrode 158 is connected to The first light-emitting element 111 is electrically connected to provide a driving circuit to the first light-emitting element 111. The thin film transistor may be a driving transistor, or may be an emission control transistor or the like.

The substrate 151 may be a glass substrate or a plastic substrate, for example.

The first light-emitting element 111 is, for example, a blue OLED. As shown in FIG. 4, the first light emitting element 111 may include a first electrode 1111, an organic light emitting layer 1112, and a second electrode 1113 that are sequentially stacked. The organic light emitting layer 1113 is configured to be applied to the first electrode 1111 and the second electrode 1112. Under voltage, blue light in the first wavelength range is emitted. The organic light-emitting layer 1113 may also include multiple sublayers as required, for example, an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer, and a hole injection layer. The material of the light-emitting layer can be a fluorescent light-emitting material or a phosphorescent light-emitting material. Wait, I won't repeat it here.

The first electrode 1111 may be the anode of the first light-emitting element 111, for example, may be a metal, a conductive metal oxide (such as ITO, AZO), or a laminated structure of a metal and a conductive metal oxide. An opening is formed on the pixel defining layer 160 to define the first light emitting element 111.

The second electrode 1113 may be the cathode of the first light-emitting element 111. In addition, the second electrode 1112 may be a transparent electrode, such as a metal electrode or a transparent conductive oxide electrode, to allow the blue light emitted by the organic light-emitting layer 1112 to be transmitted.

Returning to FIG. 1, the first encapsulation layer 170 may cover the first light emitting element 111, the second light emitting element 121 and the third light emitting element 131. The first light conversion layer 112, the second light conversion layer 122, the third transparent resin layer 132, and the black matrix 180 are disposed on the first encapsulation layer 170. The first encapsulation layer 170 is beneficial to reduce optical crosstalk or color mixing. In addition, the first encapsulation layer 170 can protect the first light-emitting element 111, the second light-emitting element 121, and the third light-emitting element 131, which is beneficial to improve the life of the first light-emitting element 111, the second light-emitting element 121, and the third light-emitting element 131 .

For example, the first encapsulation layer 170 may be an inorganic encapsulation layer, such as silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, At least one of tin oxide, cerium oxide, or silicon nitride oxide.

In other embodiments, instead of a single first encapsulation layer 170, a laminate including an inorganic encapsulation layer, an organic layer, and an additional inorganic encapsulation layer (ie, a composite encapsulation layer) may be provided instead.

The black matrix 180 may include a plurality of matrix bars, the matrix bars are disposed on the first encapsulation layer 170 and are disposed adjacently among the first color sub-pixel unit 110, the second color sub-pixel unit 120, and the third color sub-pixel unit 130. Between the two. The matrix strips of the black matrix 180 may be made of black resin or metal oxide, and the contact angle of the black resin to the propylene glycol methyl ether acetate (PGMEA) solvent is greater than 40°. The thickness of the black matrix may be 2-12 μm, for example 4-10 μm.

The second encapsulation layer 190 covers the first color filter layer 113, the second color filter layer 123, the third transparent resin layer 132 and the black matrix 180.

FIG. 5 shows a pixel unit 200 of a display panel according to another embodiment of the present disclosure. As shown in FIG. 5, the display panel includes a pixel unit 200 that includes a first color sub-pixel unit 210, a second color sub-pixel unit 220 and a third color sub-pixel unit 230.

In this embodiment, the first color sub-pixel unit 210 may include a first light-emitting element 211, a first light conversion layer 212, a first color filter layer 213, and a reflective material 240. The reflective material 240 is disposed on the first color filter. In the optical layer 213.

In this embodiment, the second color sub-pixel unit 220 may include a second light emitting element 221, a second light conversion layer 222, a second color filter layer 223, and a reflective material 240. The reflective material 240 is disposed on the second color filter. In the optical layer 223.

In this embodiment, the third color sub-pixel unit 230 includes a third light-emitting element 231 and a third transparent resin layer.

Different from the pixel unit 200 shown in FIG. 1, the first color sub-pixel unit 210 of the pixel unit 200 further includes a first transparent resin layer, and the second color sub-pixel unit 220 of the pixel unit 200 further includes a second transparent resin layer. . The first transparent resin layer, the second transparent resin layer, and the third transparent resin layer can be formed as an integral transparent resin layer 201, so that the workload of patterning can be reduced.

The transparent resin layer 201 may be dispersed with scattering particles to scatter light passing therethrough.

FIG. 6 shows a pixel unit 300 of a display panel according to another embodiment of the present disclosure. As shown in FIG. 6, the display panel includes a pixel unit 300, and the pixel unit 300 includes a first color sub-pixel unit 310, a second color sub-pixel unit 320 and a third color sub-pixel unit 330.

In this embodiment, the first color sub-pixel unit 310 may include a first light emitting element 311, a first light conversion layer 312, a first color filter layer 313, and a reflective material 340.

In this embodiment, the second color sub-pixel unit 320 may include a second light-emitting element 321, a second light conversion layer 322, a second color filter layer 323, and a reflective material 340.

In this embodiment, the third color sub-pixel unit 330 includes a third light-emitting element 331 and a third transparent resin.

Different from the pixel unit 300 shown in FIG. 1, the first color sub-pixel unit 310 of the pixel unit 300 further includes a first transparent resin layer, and the second color sub-pixel unit 320 of the pixel unit 300 further includes a second transparent resin layer. . The first transparent resin layer, the second transparent resin layer, and the third transparent resin layer can be formed as an integral transparent resin layer 301, so that the workload of patterning can be reduced.

The transparent resin layer 301 may be dispersed with scattering particles to scatter the light passing therethrough.

In addition, unlike the pixel unit 300 shown in FIG. 1, the reflective material 340 is dispersed in the overall transparent resin layer 301 instead of the first color filter layer 313 and the second color filter layer 323.

In this embodiment, the first color filter layer 313 and the second color filter layer 323 can be made thin to allow part of the main color light reflected by the reflective material 340 to pass through to reach the first light conversion layer 212 And the corresponding one of the second light conversion layer 222.

In other embodiments, the first transparent resin layer, the second transparent resin layer, and the third transparent resin layer may also be formed independently of each other.

In other embodiments, the first transparent resin layer may be disposed between the first light conversion layer 312 and the first color filter layer 313, and the second transparent resin layer may be disposed between the second light conversion layer 322 and the second color filter layer 313. Between the filter layer 323. In addition, in this embodiment, the reflective material 340 may be dispersed in at least the first transparent resin layer and the second transparent resin layer.

At least one embodiment of the present disclosure provides a method for manufacturing a display panel. The manufacturing method includes: forming a first light emitting element; forming a first light conversion layer on the light exit side of the first light emitting element; and providing a reflective material. The first light-emitting element is configured to emit main color light in the first wavelength range. The first light conversion layer is configured to receive at least a part of the main color light to emit a first color light, and the wavelength range of the first color light is different from the first wavelength range of the main color light. The reflective material is configured to reflect at least another part of the main color light, and is arranged in at least one of the following positions: the light exit side of the first light conversion layer and the first light conversion layer.

In an embodiment of the present disclosure, the first light conversion layer converts the main color light into a first color light different from the main color light. By appropriately disposing the first light conversion layer in the display panel, the conversion can help to improve the color purity of the first color light emitted by the display panel, thereby improving the color purity of the first color sub-pixel unit.

In an embodiment of the present disclosure, the reflective material may reflect at least another part of the main color light. The light not converted by the first light-to-light conversion layer can be reflected by the reflective material back to the first light conversion layer, thereby improving the light conversion efficiency, and reducing the light not converted by the first light-to-light conversion layer (that is, the The main color light emitted by the color sub-pixel unit has an adverse effect on the color purity of the first color sub-pixel unit.

In at least one embodiment, the first light-emitting element and the first light conversion layer may be sequentially formed on a substrate. In at least one embodiment, it is also possible to form a first color filter layer on the first light conversion layer, and dispose the reflective material in the first color filter layer.

In another embodiment, the display panel may be manufactured by a box-to-box process. For example, the first light-emitting element may be formed on the first substrate, and the first light conversion layer may be formed on the second substrate. Moreover, in another embodiment, the manufacturing method may further include: facing and combining the first substrate and the second substrate, so that the first light conversion layer and the first light-emitting element are aligned. By forming the first light-emitting element and the first light conversion layer on the first substrate and the second substrate respectively, and then directly or indirectly bonding the first light-emitting element and the first light conversion layer together, it is possible to prevent the formation of the first light-emitting element and the first light conversion layer. The first light-emitting element is damaged during the light conversion layer.

FIG. 7 shows a method of manufacturing a display panel according to an embodiment of the present disclosure, for example, for manufacturing a display panel including pixel units 100, 200, 300 as described above. 8A-8B show views of the pixel unit at a stage in the manufacturing method shown in FIG. 7. As shown in FIGS. 7-8B, in this embodiment, the manufacturing method of the display panel may include step S620 to step S680, which are specifically described as follows:

In step S620, the first light-emitting element 411, the second light-emitting element 421 and the third light-emitting element 431 are formed on the substrate 450, which includes a first base.

For example, step S620 may include forming a first electrode on the substrate 450 using an evaporation process, forming an organic light-emitting layer on the first electrode using an evaporation process, and forming a second electrode on the organic light-emitting layer using an evaporation process. In another example, a printing process may be used to form the organic light emitting layer. The first electrode or the second electrode may be a metal, a conductive metal oxide (such as ITO, AZO), or a laminated structure of a metal and a conductive metal oxide. The substrate 450 is, for example, an active TFT substrate.

Step S630, forming a first encapsulation layer 470 covering the first light emitting element 411, the second light emitting element 421, and the third light emitting element 431, as shown in FIG. 8A.

For example, step S630 may include forming the first encapsulation layer 470 using a low-temperature curing or light curing process. For example, the first packaging layer 470 may be an inorganic packaging layer, such as silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, At least one of tin oxide, cerium oxide, or silicon nitride oxide.

In step S650, the first light conversion layer 412 and the second light conversion layer 422 are formed on the first encapsulation layer 470.

Step S650 may include forming a first light conversion layer 412 and forming a second light conversion layer 422. In an example, forming the first light conversion layer 412 may include: dispersing the first quantum dots into the resin material of the first light conversion layer 412; coating the resin of the first light conversion layer 412 dispersed with the first quantum dots Material; and using a mask and light to pattern the resin material. In another example, forming the first light conversion layer 412 may include: dispersing the first quantum dots into the resin material of the first light conversion layer 412; printing the resin of the first light conversion layer 412 dispersed with the first quantum dots Material; and low temperature curing the resin material. The second light conversion layer 422 may be formed in a process similar to the first light conversion layer 412.

Step S660, forming a first color filter layer 413 and a second color filter layer 423 on the first light conversion layer 412 and the second light conversion layer 422, respectively.

Step S660 may include forming a first color filter layer 413 and forming a second color filter layer 423. In an example, forming the first color filter layer 413 may include: dispersing color pigments or dyes into the resin material of the first color filter layer 413; coating the first color filter layer dispersed with color pigments or dyes 413; and using a mask and light to pattern the resin material. In another example, forming the first color filter layer 413 may include: dispersing color pigments or dyes into the resin material of the first color filter layer 413; printing the first color filter layer in which the color pigments or dyes are dispersed 413 resin material; and low temperature curing the resin material. The second color filter layer 423 can be formed in a similar process to the first color filter layer 413.

In step S670, a third transparent resin layer 432 is formed on the first encapsulation layer 470, as shown in FIG. 8B.

For example, step S670 may include forming the third transparent resin layer 432 using a low-temperature curing or light curing process. For example, forming the third transparent resin layer 432 may include: coating the material of the third transparent resin layer 432; and patterning the material of the third transparent resin layer 432 using a mask and light. For example, forming the third transparent resin layer 432 may include: printing a material of the third transparent resin layer 432; and curing the material of the third transparent resin layer 432 at a low temperature.

Step S680, forming a second encapsulation layer on the first color filter layer 413, the second color filter layer 423, and the third transparent resin layer 432.

The second encapsulation layer may be formed similarly to the first encapsulation layer 470.

For example, the first color filter layer 413 and the second color filter layer 423 are dispersed with the reflective material 440.

For example, in an example, step S660 may include the following steps S661 to S664:

Step S661, providing a polymer membrane capsule wrapped with a reflective material 440;

Step S662: Disperse the polymer membrane capsules wrapped with the reflective material 440 to the color resin of the first color filter layer 413 to form a first stable system, for example, by stirring;

Step S663, disperse the polymer membrane capsule wrapped with the reflective material 440 to the color resin of the second color filter layer 423 to form a second stable system, for example, by stirring;

Step S664, using the formed first stable system and second stable system to form the first color filter layer 413 and the second color filter layer 423 with the reflective material 440 dispersed, respectively.

In addition, the manufacturing method of the display panel may further include step S610, forming a pixel defining layer 460 on the substrate 450, and the pixel defining layer 460 is used to define the first light emitting element 411, the second light emitting element 421, and the third light emitting element 431. For example, a pixel defining layer 460 having openings may be formed, and then the first light emitting element 411, the second light emitting element 421, and the third light emitting element 431 may be formed in each opening of the pixel defining layer 460, respectively.

In addition, the manufacturing method of the display panel may further include step S640, forming a black matrix 480 on the first encapsulation layer 470, the black matrix 480 includes a plurality of matrix bars extending in a first direction and a plurality of matrix bars extending in a second direction. The first direction and the second direction cross each other with the matrix strips. These cross matrix strips form a plurality of openings, and these openings are used to define the first light conversion layer 412, the second light conversion layer 422, the first color filter layer 413, The second color filter layer 423 and the third transparent resin layer 432.

In addition, in other embodiments, alternatively, step S670 may include forming a third transparent resin layer on the first encapsulation layer 470, forming a first transparent resin layer on the first color filter layer, and forming a second color filter layer. A second transparent resin layer is formed on the layer. The first transparent resin layer, the second transparent resin layer and the third transparent resin layer are formed as an integral transparent resin layer.

One or more of the first color filter layer 413, the second color filter layer 423, the first light conversion layer 412, the second light conversion layer 422, and the third transparent resin layer 432 may be manufactured in a low temperature process, for example, by Low curing or light curing. The low temperature process may be a photolithography process or a printing process, but is not limited thereto. Here, the low temperature may be less than 100°C. The low temperature process can prevent the first light emitting element 411, the second light emitting element 421, and the third light emitting element 431 that have been formed from being damaged.

The above steps are not limited to be executed in the specified order, and they can also be executed in parallel or in other orders.

FIG. 9 shows a method of manufacturing a display panel according to another embodiment of the present disclosure, for example, for manufacturing a display panel including pixel units 100, 200, 300 as described above.

As shown in FIG. 9, in this embodiment, the manufacturing method of the display panel adopts the box-matching process, for example, it may include:

Step S720, forming the first light emitting element 511, the second light emitting element 521 and the third light emitting element 531 on the substrate 550, the substrate 550 including a first base;

Step S730, forming a first encapsulation layer 570 covering the first light emitting element 511, the second light emitting element 521, and the third light emitting element 531, as shown in FIG. 10A;

Step S750, forming a first color filter layer 513 and a second color filter layer 523 on the second substrate 551;

Step S760, forming a first light conversion layer 512 and a second light conversion layer 522 on the first color filter layer 513 and the second color filter layer 523, respectively;

Step S770, forming a third transparent resin layer 532 on the second substrate 551, as shown in FIG. 10B;

Step S780, the substrate 550 and the second base 551 are opposed to each other, so that the first light conversion layer 512 and the first light-emitting element 511, the second light conversion layer 522 and the second light-emitting element 521, and the third transparent resin layer 532 and the third light-emitting element The elements 531 are aligned and sandwiched between the first light conversion layer 512 and the first light-emitting element 511, between the second light conversion layer 522 and the second light-emitting element 521, and the third transparent resin layer 532 and the third light-emitting element 531 Place an organic drying layer 552, as shown in FIG. 10C; and

In step S790, the second substrate 551 is removed.

For example, the first color filter layer 513 and the second color filter layer 523 are dispersed with the reflective material 540. In another embodiment, if necessary, the second substrate can also be reserved as a cover plate of the display panel on the display side.

In addition, similar to the method shown in FIG. 7, the manufacturing method of the display panel may further include step S710 of forming a pixel defining layer 560 on the substrate 550.

In addition, similar to the method shown in FIG. 7, the manufacturing method of the display panel may further include step S740 of forming matrix bars of the black matrix 580 on the second substrate 551.

In addition, the manufacturing method of the display panel may further include step S300 (not shown), covering the first color filter layer 513, the second color filter layer 523, and the third transparent resin layer 532 with a second encapsulation layer.

The above steps are not limited to be executed in the specified order, and they can also be executed in parallel or in other orders.

At least one embodiment of the present disclosure provides a display device. The display device may include a display panel. For example, the display panel includes pixel units. The pixel unit includes a first color sub-pixel unit. The first color sub-pixel unit includes a first light-emitting element, a first light conversion layer, and a reflective material. The first light-emitting element is configured to emit main color light in the first wavelength range. The first light conversion layer is disposed on the light exit side of the first light-emitting element, and is configured to receive at least a part of the main color light to emit the first color light, and the wavelength range of the first color light is different from the first wavelength range of the main color light. The reflective material is configured to reflect at least another part of the main color light, and is arranged in at least one of the following positions: the light exit side of the first light conversion layer and the first light conversion layer.

For example, the display panel is any one of the display panels described above.

The display device may further include a backlight module, and the display panel may be disposed adjacent to the backlight module.

The display device may further include a control circuit for controlling the light emission of each pixel unit. For example, the control circuit may be connected to the drive circuit of the substrate of the display device.

In addition, the display device may further include a pressing sensor for sensing the pressing of the display panel by an external object.

The scope of the present disclosure is not limited by the above-described embodiments, but by the appended claims and their equivalent scope.

Claims (21)

1. A display panel including:

   Pixel unit, including:

   The first color sub-pixel unit, wherein the first color sub-pixel unit includes:

   The first light-emitting element is configured to emit main color light in the first wavelength range;

   The first light conversion layer is arranged on the light-emitting side of the first light-emitting element and is configured to receive at least a part of the main colored light to emit a first colored light, and the wavelength range of the first colored light is different from that of the The first wavelength range of the main colored light; and

   The reflective material is configured to reflect at least another part of the main color light, and is arranged in at least one of the following positions: the light exit side of the first light conversion layer and the first light conversion layer.
2. The display panel of claim 1, wherein:

   The main color light is blue light,

   The reflection wavelength of the reflective material is in the range of 405-480 nm.
3. The display panel of claim 1, wherein:

   The main color light is blue light,

   The reflective material is cholesteric liquid crystal, and the cholesteric liquid crystal reflects blue circularly polarized light.
4. The display panel of claim 3, wherein:

   The pitch of the cholesteric liquid crystal is in the range of 230-350 nm, and the optical anisotropy of the cholesteric liquid crystal is in the range of 0.12-0.22.
5. The display panel according to any one of claims 1-4, wherein:

   The reflective material is wrapped in a polymer membrane capsule.
6. The display panel of claim 5, wherein:

   The particle size of the polymer membrane capsule is in the range of 0.5-5 μm.
7. The display panel according to any one of claims 1-6, wherein:

   The reflective material has left-handed characteristics or right-handed characteristics or both left-handed characteristics and right-handed characteristics.
8. The display panel according to any one of claims 1-7, wherein:

   The first color sub-pixel unit further includes:

   The first color filter layer is disposed on the light exit side of the first light conversion layer and is configured to allow at least a part of the first color light to be transmitted.
9. The display panel according to claim 8, wherein:

   The reflective material is dispersed in the first color filter layer.
10. The display panel according to any one of claims 1-9, wherein:

    The first light conversion layer includes a plurality of first quantum dots configured to be excited by the at least a portion of the main color light to emit the first color light.
11. The display panel according to any one of claims 1-10, wherein:

    The first color sub-pixel unit further includes:

    The first transparent resin layer is arranged on the light exit side of the first light conversion layer and the reflective material is dispersed in the first transparent resin layer.
12. The display panel according to any one of claims 1-10, wherein:

    The pixel unit further includes:

    The second color sub-pixel unit, wherein the second color sub-pixel unit includes:

    The second light-emitting element is configured to emit main color light in the first wavelength range;

    The second light conversion layer is disposed on the light exit side of the second light-emitting element, and receives at least a part of the main color light to emit a second color light, the wavelength range of the second color light is different from the main color The first wavelength range of light; and

    The reflective material is configured to reflect at least another part of the main color light, and is arranged in at least one of the following positions: the light exit side of the second light conversion layer and the second light conversion layer.
13. The display panel according to claim 12, wherein:

    The main color light is blue light, one of the first color light and the second color light is green light, and the other of the first color light and the second color light is red light.
14. The display panel according to claim 12 or 13, wherein:

    The pixel unit further includes:

    The third color sub-pixel unit, wherein the third color sub-pixel unit includes:

    A third light-emitting element configured to emit main color light in the first wavelength range; and

    The third transparent resin layer is arranged on the light emitting side of the third light emitting element.
15. The display panel according to claim 14, wherein:

    A plurality of scattering particles are dispersed in the third transparent resin layer.
16. The display panel according to claim 14, wherein:

    The first color sub-pixel unit further includes a first transparent resin layer disposed on the light-emitting side of the first light conversion layer, and the second color sub-pixel unit further includes a light-emitting resin layer disposed on the second light conversion layer. The second transparent resin layer on the side, the first transparent resin layer, the second transparent resin layer, and the third transparent resin layer are formed as an integral transparent resin layer.
17. The display panel according to claim 16, wherein:

    The reflective material is dispersed in the integral transparent resin layer.
18. The display panel according to any one of claims 14-17, wherein:

    Each of the plurality of pixel units further includes:

    A first encapsulation layer covering the first light-emitting element, the second light-emitting element, and the third light-emitting element, the first light conversion layer, the second light conversion layer, and the third light conversion layer It is arranged on the first encapsulation layer.
19. The display panel according to any one of claims 14-18, further comprising:

    The substrate is provided with an array drive circuit, wherein the array drive circuit includes a first pixel drive circuit, a second pixel drive circuit, and a third pixel drive circuit in the pixel unit, which are respectively used to drive the first light-emitting element , The second light-emitting element and the third light-emitting element,

    The first light-emitting element, the second light-emitting element, and the third light-emitting element are provided on the substrate.
20. A method for manufacturing a display panel includes:

    Forming a first light-emitting element, wherein the first light-emitting element is configured to emit main color light in a first wavelength range; and

    A first light conversion layer is formed on the light emitting side of the first light-emitting element, wherein the first light conversion layer is configured to receive at least a part of the main color light to emit a first color light, and the first color light The wavelength range of is different from the first wavelength range of the primary colored light,

    A reflective material is provided, wherein the reflective material is configured to reflect at least another part of the main color light, and is disposed at at least one of the following positions: the light exit side of the first light conversion layer and the first light In the conversion layer.
21. 22. The manufacturing method of claim 20, wherein the first light emitting element is formed on a first substrate, and the first light conversion layer is formed on a second substrate, the manufacturing method further comprising:

    The first substrate and the second substrate are opposed and combined, so that the first light conversion layer and the first light-emitting element are aligned.

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