Display panel, preparation method thereof and VR device

Abstract

The invention provides a display panel, a preparation method thereof and a VR device. The display panel is provided with a display area, the display area comprises a light-emitting area and a non-light-emitting area, and the display panel comprises a substrate, a plurality of light-emitting devices and a photoluminescence structure. The light-emitting devices are located in the light-emitting area. The photoluminescence structure is arranged in the non-luminous area and comprises a plurality of photoluminescence units, the photoluminescence units correspond to the luminous devices respectively and surround the corresponding luminous devices, and the color of photoluminescence of the photoluminescence units is consistent with the color of light emitted by the adjacent luminous devices. In the display panel, the problem of a screen window effect due to a boundary between a light-emitting region and a non-light-emitting region is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular, to a display panel and a method for preparing the same, and a VR device. Background Art

[0002] As the market for virtual reality technology (hereinafter referred to as "VR") continues to expand, OLED (Organic Light-Emitting Diode) display panels, especially silicon-based OLED micro display panels, are widely used as near-eye displays in the VR field. Since the micro display panel is very close to the human eye, when the resolution of the micro display panel is insufficient, the human eye can easily see the boundary between the luminous area and the non-luminous area, presenting a screen door effect, which will seriously affect the user experience. Summary of the invention

[0003] The present disclosure provides a display panel, a preparation method thereof, and a VR device. By setting a photoluminescent structure in the display panel, the boundary between the luminous area and the non-luminous area is reduced, and the screen window effect is weakened, thereby improving the display quality of the micro display screen, enhancing the user experience, and promoting metaverse technology.

[0004] In a first aspect, the present disclosure provides a display panel. The display panel has a display area, the display area includes a light-emitting area and a non-light-emitting area, and the display panel includes a substrate, a plurality of light-emitting devices, and a photoluminescent structure. The plurality of light-emitting devices are located in the light-emitting area. The photoluminescent structure is disposed in the non-light-emitting area and includes a plurality of photoluminescent units, the photoluminescent units correspond to the light-emitting devices respectively and surround the corresponding light-emitting devices, and the color of the photoluminescent light emitted by the photoluminescent units is consistent with the color of the light emitted by the adjacent light-emitting devices.

[0005] In the above scheme, the photoluminescent structure located in the non-luminescent area of ​​the display panel can increase the brightness of the non-luminescent area, thereby weakening the boundary between the non-luminescent area and the luminescent area by reducing the brightness difference between the two, thereby reducing the screen effect.

[0006] In a specific embodiment of the first aspect of the present disclosure, the photoluminescent unit defines a pixel opening, and the pixel opening limits the light-emitting device. For example, further, the orthographic projection of the photoluminescent unit on the substrate is a closed ring.

[0007] In the above solution, the photoluminescent unit not only reduces the screen effect, but also replaces the pixel defining layer, thereby optimizing the structure of the display panel, making the display panel lighter and thinner, and improving the user experience of the product.

[0008] In a specific embodiment of the first aspect of the present disclosure, an isolation structure is provided between adjacent photoluminescent units. For example, further, the isolation structure is a light absorbing layer or a light reflecting layer.

[0009] In the above solution, the design of the isolation structure avoids the light crosstalk problem between adjacent photoluminescent units, thereby improving the display effect of the display panel.

[0010] In a specific embodiment of the first aspect of the present disclosure, a barrier layer is disposed on the side surface and the top surface of the photoluminescent structure. For example, further, the barrier layer is an inorganic film layer.

[0011] In the above solution, a blocking layer is provided on the photoluminescent structure to block the photoluminescent material in the photoluminescent structure from penetrating into the light-emitting functional layer of the adjacent light-emitting device, thereby improving the reliability of the display panel.

[0012] In a specific embodiment of the first aspect of the present disclosure, the display panel further includes a flat layer between the substrate and the light-emitting device, and the photoluminescent structure is located in the flat layer. For example, further, the photoluminescent structure and the flat layer are an integral structure. For example, further, the light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate, and the first electrode is a light-shielding electrode, and at least a portion of the orthographic projection of the photoluminescent structure on the substrate is located outside the orthographic projection of the first electrode on the substrate; or the first electrode is a transparent electrode, and at least a portion of the orthographic projection of the photoluminescent structure on the substrate is located within the orthographic projection of the first electrode on the substrate.

[0013] In the above solution, a photoluminescent structure is provided in the flat layer and the specific position of the photoluminescent structure is adjusted according to the condition of the first electrode of the light-emitting device, so that the display panel has a variety of optional solutions while improving the screen window effect, thereby improving the adaptability of the product.

[0014] In a specific embodiment of the first aspect of the present disclosure, the display panel further comprises an encapsulation layer located on a side of the light-emitting device away from the substrate, the encapsulation layer comprises an organic encapsulation layer, and the photoluminescent structure is located in the organic encapsulation layer. For example, further, the photoluminescent structure and the organic encapsulation layer are an integrated structure.

[0015] In the above solution, a photoluminescent structure is designed in the encapsulation layer, which can further weaken the boundary between the luminous area and the non-luminous area in the display panel, thereby reducing the screen effect.

[0016] In a specific embodiment of the first aspect of the present disclosure, scattering particles are distributed in the photoluminescent structure.

[0017] In the above solution, scattering particles are used to scatter the light emitted by the photoluminescent structure in a larger range in the corresponding non-luminescent area, thereby more effectively reducing the screen effect.

[0018] In a specific embodiment of the first aspect of the present disclosure, the display panel further includes a planar layer located between the substrate and the light-emitting device and a thermochromic structure disposed in the planar layer, and the color of light emitted by the thermochromic structure is consistent with the color of light emitted by the light-emitting device adjacent to the thermochromic structure. For example, further, the thermochromic structure and the planar layer are an integrated structure.

[0019] In the above scheme, the design scheme of setting a thermochromic structure in the flat layer can utilize the heat energy generated by the light-emitting device to produce thermoluminescence, which can not only weaken the screen window effect, but also reduce the risk of aging of the display panel due to heat by converting heat energy into light energy.

[0020] A second aspect of the present disclosure provides a VR device, which includes the display panel of the first aspect.

[0021] The third aspect of the present disclosure provides a method for preparing a display panel, wherein the display panel has a display area, and the display area includes a light-emitting area and a non-light-emitting area. The preparation method includes providing a substrate. A plurality of first electrodes are formed on the substrate, and the first electrodes are formed in the light-emitting area. A photoluminescent structure is prepared, and the photoluminescent structure is formed in the non-light-emitting area and includes a plurality of photoluminescent units, and the photoluminescent units form a plurality of pixel openings corresponding to the first electrodes respectively. A light-emitting functional layer and a second electrode are sequentially formed in the pixel openings, and the first electrode, the light-emitting functional layer and the second electrode superimposed on each other at the pixel opening form a light-emitting device, and the color of the light emitted by the light-emitting functional layer in each pixel opening is consistent with the color of the photoluminescence of the corresponding surrounding photoluminescent unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0023] Figure 2 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0024] Figure 3 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0025] Figure 4 A cross-sectional schematic diagram of a display panel provided in accordance with another embodiment of the present disclosure.

[0026] Figure 5 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0027] Figure 6 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0028] Figure 7A cross-sectional schematic diagram of a display panel provided in accordance with another embodiment of the present disclosure.

[0029] Figure 8 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0030] Fig. 9 A cross-sectional schematic diagram of a display panel provided in accordance with another embodiment of the present disclosure.

[0031] Fig.10 A cross-sectional schematic diagram of a display panel provided in accordance with another embodiment of the present disclosure.

[0032] Fig.11 A cross-sectional schematic diagram of a display panel provided in accordance with another embodiment of the present disclosure.

[0033] Fig.12 A cross-sectional schematic diagram of a display panel provided by an embodiment of the present disclosure.

[0034] Fig.13 A schematic flow chart of a method for preparing a display panel provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] The screen-door effect of VR display affects the user's immersive experience and has always been a problem that needs to be overcome. The screen-door effect is the result of a "low fill factor", that is, the proportion of the luminous area of ​​the pixel point in the unit area of ​​the pixel is small, and the display panel resolution is low. When the display is magnified near the eye, the human eye will directly see the pixel structure of the display panel, making the displayed image unreal, just like looking at something behind a screen, affecting the visual experience. Substantially increasing the resolution of the display panel to reach retinal clarity can eliminate the screen-door effect, which requires further improvement in the pixel density of the display panel and the computing power of the processor. A more economical method is to reduce the boundary between the luminous area and the non-luminous area to improve the screen-door effect.

[0037] In view of this, the embodiments of the present disclosure provide a display panel, a preparation method thereof, and a VR device. By setting a photoluminescent structure in the non-luminous area of ​​the display panel, the non-luminous area can also emit light when the luminous area emits light, thereby reducing the brightness difference between the luminous area and the non-luminous area when the display panel emits light, thereby improving the display panel, especially the micro display panel, when the resolution is insufficient, the human eye can easily see the boundary between the luminous area and the non-luminous area, presenting the problem of a screen window effect.

[0038] The embodiment of the present disclosure provides a display panel. The display panel has a display area, the display area includes a light-emitting area and a non-light-emitting area, and the display panel includes a substrate, a plurality of light-emitting devices and a photoluminescent structure. The plurality of light-emitting devices are located in the light-emitting area. The photoluminescent structure is arranged in the non-light-emitting area and includes a plurality of photoluminescent units, the photoluminescent units correspond to the light-emitting devices respectively and surround the corresponding light-emitting devices, and the color of the photoluminescent light emitted by the photoluminescent units is consistent with the color of the light emitted by the adjacent light-emitting devices. In this way, when the display panel is working, the light-emitting devices in the light-emitting area of ​​the display panel emit light, and the photoluminescent units arranged around the light-emitting devices in the photoluminescent structure in the non-light-emitting area receive the light emitted by the light-emitting devices and are excited to emit light, and the color of the photoluminescent light emitted by the photoluminescent units is consistent with the color of the light emitted by the adjacent light-emitting devices, so that the display effect of the display panel is not affected, and the brightness difference between the light-emitting area and the non-light-emitting area of ​​the display panel is reduced, and the boundary between the two is weakened, thereby weakening the screen effect.

[0039] In the following, a display panel and a method for manufacturing the same and a VR device according to at least one embodiment of the present disclosure are described in conjunction with the accompanying drawings. Figure 1-12 As shown, in at least one embodiment of the present disclosure, a spatial rectangular coordinate system is established based on the surface where the display panel is located to define the positions of various film layers in the display panel. In the spatial rectangular coordinate system, the Y axis and the Z axis are parallel to the surface where the display panel is located, and the X axis is perpendicular to the surface where the display panel is located.

[0040] In the display panel 10 provided in at least one embodiment of the present disclosure, the display panel 10 has a display area AA, the display area AA includes a light-emitting area 10a and a non-light-emitting area 10b, and the display panel 10 includes a substrate 110, a plurality of light-emitting devices 130, and a photoluminescent structure 140. The plurality of light-emitting devices 130 are located in the light-emitting area 10a. The photoluminescent structure 140 is disposed in the non-light-emitting area 10b and includes a plurality of photoluminescent units 141, the photoluminescent units 141 correspond to the light-emitting devices 130 respectively and surround the corresponding light-emitting devices 130, and the color of the photoluminescent light emitted by the photoluminescent units 141 is consistent with the color of the light emitted by the adjacent light-emitting devices 130.

[0041] For example, Figure 1As shown, the display panel 10 includes a substrate 110, a pixel defining layer 120, a plurality of light-emitting devices 130, and a photoluminescent unit 141. The substrate 110 may include a substrate and a driving device layer located on one side of the substrate. The driving device layer includes a plurality of signal lines distributed in rows and columns, and the row signal lines and the column signal lines cross to define a plurality of sub-pixel circuit regions, each sub-pixel circuit region is provided with a pixel circuit, and the pixel circuit includes a plurality of functional layers insulated from each other by an interlayer insulating layer. The pixel defining layer 120 is located on the substrate 110 and defines a plurality of pixel openings 121 for limiting the light-emitting devices 130. The light-emitting devices 130 are arranged on the substrate 110 and are located in the light-emitting area 10a of the display area AA of the display panel 10. Specifically, the plurality of light-emitting devices 130 include a first light-emitting device 130a, a second light-emitting device 130b, and a third light-emitting device 130c, and the first light-emitting device 130a, the second light-emitting device 130b, and the third light-emitting device 130c form a pixel unit, and the plurality of pixel units are arranged in a matrix on the substrate 110. The colors of lights emitted by the first light emitting device 130a, the second light emitting device 130b, and the third light emitting device 130c are any one of red, green, and blue, and are different from each other.

[0042] like Figure 1 As shown, the light emitted by the first light emitting device 130a is red light, the light emitted by the second light emitting device 130b is green light, and the light emitted by the third light emitting device 130c is blue light. The photoluminescent structure 140 is located on the surface of the substrate 110, for example, the pixel defining layer 120 away from the substrate 110 and is located in the non-luminescent area 10b of the display area AA of the display panel 10. The photoluminescent structure 140 includes a plurality of photoluminescent units 141. For example, the photoluminescent unit 141 includes a first photoluminescent unit 141a, a second photoluminescent unit 141b, and a third photoluminescent unit 141c. Each photoluminescent unit 141 is arranged corresponding to the light emitting device 130 and surrounds the corresponding light emitting device 130. Specifically, the first photoluminescent structure 140 surrounds the first light emitting device 130a, and the color of the photoluminescence of the first photoluminescent unit 141a is consistent with the color of the light emitted by the first light emitting device 130a, which is red. The second photoluminescent structure 140 surrounds the second light emitting device 130b, and the color of the photoluminescent light emitted by the second photoluminescent unit 141b is consistent with the color of the light emitted by the second light emitting device 130b, which is green. The third photoluminescent structure 140 surrounds the third light emitting device 130c, and the color of the photoluminescent light emitted by the third photoluminescent unit 141c is consistent with the color of the light emitted by the third light emitting device 130c, which is blue.

[0043] It should be noted that the structure of the display panel 10 in the present disclosure is not limited to the structure in the above-mentioned embodiment. For example, the light-emitting device 130 in the pixel unit is not limited to the three light-emitting devices 130 in the above-mentioned example. One light-emitting device 130, two light-emitting devices 130, four light-emitting devices 130 or more may also be provided, and the color of the light emitted by different light-emitting devices 130 is not limited to the red, green and blue in the above-mentioned example. For example, based on the different sensitivities of the human eye to different colors, the size of the light-emitting devices 130 emitting different colors may be adjusted according to the sensitivity of the human eye to colors to enhance the user's perception. Specifically, the size of the light-emitting device 130 emitting blue light may be enlarged or the size of the light-emitting device 130 emitting green light may be reduced. For example, the size between the light-emitting devices 130 emitting different colors may be adjusted according to the specific situation. All of the above can be adjusted according to actual needs, and will not be elaborated here.

[0044] After the photoluminescent structure 140 is provided in the display panel 10 to reduce the screen window effect, the embodiment of the present disclosure further defines the film layer position of the photoluminescent structure 140 in the display panel 10 , and the specific solution is as follows.

[0045] In the display panel 10 provided in one embodiment of the present disclosure, the photoluminescent unit 141 defines a pixel opening 121, and the pixel opening 121 is used to limit the light-emitting device 130. In the display panel 10 provided in at least one embodiment of the present disclosure, the orthographic projection of the photoluminescent unit 141 on the substrate 110 is a closed ring. In this way, after the photoluminescent unit 141 is prepared, the pixel opening 121 is formed, thereby replacing the pixel defining layer 120, simplifying the structure of the display panel 10, and facilitating the thinning of the display panel 10.

[0046] For example, Figure 2As shown, the display panel 10 includes a substrate 110, a photoluminescent structure 140 located on the substrate 110, and a plurality of light-emitting devices 130, such as a first light-emitting device 130a, a second light-emitting device 130b, and a third light-emitting device 130c. The photoluminescent structure 140 includes a plurality of photoluminescent units 141, such as a first photoluminescent unit 141a, a second photoluminescent unit 141b, and a third photoluminescent unit 141c. The first photoluminescent unit 141a, the second photoluminescent unit 141b, and the third photoluminescent unit 141c respectively form a first pixel opening 121a, a second pixel opening 121b, and a third pixel opening 121c. The first pixel opening 121a is used to limit the first light-emitting device 130a, the second pixel opening 121b is used to limit the second light-emitting device 130b, and the third pixel opening 121c is used to limit the third light-emitting device 130c. Orthographic projections of the first photoluminescent unit 141a forming the first pixel opening 121a, the second photoluminescent unit 141b forming the second pixel opening 121b, and the third photoluminescent unit 141c forming the third pixel opening 121c on the substrate 110 are respectively closed rings.

[0047] The present disclosure does not limit the specific structure of the photoluminescent unit 141 , which may be a single-layer or multi-layer structure, and may be specifically designed according to actual needs, which will not be elaborated herein.

[0048] In the display panel 10 provided in one embodiment of the present disclosure, an isolation structure 150 is disposed between adjacent photoluminescent units 141. In this way, crosstalk between adjacent photoluminescent units 141 with inconsistent photoluminescent colors can be avoided.

[0049] For example, Figure 3As shown, in the display panel 10, the first light-emitting device 130a, the second light-emitting device 130b and the third light-emitting device 130c are arranged in sequence along the Y direction, and the photoluminescent unit 141 located between the first light-emitting device 130a and the second light-emitting device 130b includes a first photoluminescent unit 141a adjacent to the first light-emitting device 130a and a second photoluminescent unit 141b adjacent to the second light-emitting device 130b, and an isolation structure 150 is further provided between the first photoluminescent unit 141a and the second light-emitting unit to avoid optical crosstalk between light corresponding to the first light-emitting device 130a and the first photoluminescent unit 141a, such as red light, and light corresponding to the adjacent second light-emitting device 130b and the second photoluminescent unit 141b, such as green light. The photoluminescent unit 141 located between the second light emitting device 130b and the third light emitting device 130c includes a second photoluminescent unit 141b adjacent to the second light emitting device 130b and a third photoluminescent unit 141c adjacent to the third light emitting device 130c, and an isolation structure 150 is also provided between the second photoluminescent unit 141b and the third light emitting unit to avoid light crosstalk between the light corresponding to the second light emitting device 130b and the second photoluminescent unit 141b, such as green light, and the light corresponding to the adjacent third light emitting device 130c and the third photoluminescent unit 141c, such as blue light. In this way, the design of the isolation structure 150 avoids light crosstalk between any of the light emitting devices 130 emitting light of different colors and the photoluminescent units 141 with different photoluminescent colors in the pixel unit, thereby improving the display effect of the display panel 10.

[0050] Based on the above embodiments, after the isolation structure 150 is disposed between adjacent photoluminescent units 141 in the display panel 10 , the embodiment of the present disclosure further describes a design scheme for how the isolation structure 150 achieves an isolation effect, and the specific contents are as follows.

[0051] In the display panel 10 provided in at least one embodiment of the present disclosure, the isolation structure 150 is a light absorbing layer 151 or a light reflecting layer 152 .

[0052] For example, Figure 3As shown, in the display panel 10, the isolation structure 150 arranged between the adjacent first photoluminescent unit 141a and the second photoluminescent unit 141b is a light absorbing layer 151, such as a black light absorbing material layer. The isolation structure 150 absorbs the light corresponding to the first photoluminescent unit 141a and the first light-emitting device 130a limited by the first photoluminescent unit 141a, such as red light, and also absorbs the light corresponding to the second photoluminescent unit 141b and the second light-emitting device 130b limited by the second photoluminescent unit 141b, such as green light, thereby avoiding crosstalk between red light and green light. The isolation structure 150 disposed between the adjacent second photoluminescent unit 141b and the third photoluminescent unit 141c is a light absorbing layer 151, such as a black light absorbing material layer. The isolation structure 150 absorbs light corresponding to the second photoluminescent unit 141b and the second light emitting device 130b limited by the second photoluminescent unit 141b, such as green light, and also absorbs light corresponding to the third photoluminescent unit 141c and the third light emitting device 130c limited by the third photoluminescent unit 141c, such as blue light, thereby avoiding crosstalk between green light and blue light.

[0053] For example, Figure 4 As shown, in the display panel 10, the isolation structure 150 arranged between the adjacent first photoluminescent unit 141a and the second photoluminescent unit 141b is a reflective layer 152, such as a metal reflective layer. The metal reflective layer reflects the light corresponding to the first photoluminescent unit 141a and the first light-emitting device 130a limited by the first photoluminescent unit 141a, such as red light, to the area corresponding to the red light, and also reflects the light corresponding to the second photoluminescent unit 141b and the second light-emitting device 130b limited by the second photoluminescent unit 141b, such as green light, to the area corresponding to the green light, thereby avoiding crosstalk between red light and green light. The isolation structure 150 disposed between the adjacent second photoluminescent unit 141b and the third photoluminescent unit 141c is a reflective layer 152, such as a metal reflective layer. The metal reflective layer reflects light corresponding to the second photoluminescent unit 141b and the second light-emitting device 130b limited by the second photoluminescent unit 141b, such as green light, to an area corresponding to green light, and also reflects light corresponding to the third photoluminescent unit 141c and the third light-emitting device 130c limited by the third photoluminescent unit 141c, such as blue light, to an area corresponding to blue light, thereby avoiding crosstalk between green light and blue light.

[0054] It should be noted that the design of the isolation structure 150 of the display panel 10 in the present disclosure is not limited to the above examples and illustrations, and can also be set to other schemes. For example, in the pixel unit of the display panel 10, a light absorbing layer 151 and a light reflecting layer 152 can be set between adjacent photoluminescent units 141, or a light absorbing layer 151 is set between a pair of adjacent photoluminescent units 141, and a light reflecting layer 152 is set between another pair of adjacent photoluminescent units 141. For example, when the light reflecting layer 152 is a metal reflective layer, it can be a metal reflective layer containing silver. For example, the present disclosure does not limit the size of adjacent photoluminescent units 141 and the isolation structure 150 between the two. In terms of the height perpendicular to the direction of the substrate 110, the heights of the three can be equal or unequal. Specifically, the heights of adjacent photoluminescent units 141 are equal, and the height of the isolation structure 150 between the two is less than the height of the corresponding photoluminescent unit 141, thereby forming a groove, which can improve the problem of crosstalk between the common layers of the light-emitting device 130. All of the above can be designed according to the actual requirements of the display panel 10 and will not be elaborated here.

[0055] In the display panel 10 provided in one embodiment of the present disclosure, a barrier layer 160 is disposed on the side and top surfaces of the photoluminescent structure 140. In the display panel 10 provided in at least one embodiment of the present disclosure, the barrier layer 160 is an inorganic film layer.

[0056] For example, Figure 5 and Figure 6 As shown, in the display panel 10 , a barrier layer 160 is disposed on the top surface of the photoluminescent unit 141 and the side surface thereof which forms the pixel opening 121 defining the light emitting device 130 . Specifically, an isolation layer is provided on the top surface of the first photoluminescent unit 141a facing away from the substrate 110 and the side surface thereof contacting the first light-emitting device 130a, the top surface of the second photoluminescent unit 141b facing away from the substrate 110 and the side surface thereof contacting the second light-emitting device 130b, and the top surface of the third photoluminescent unit 141c facing away from the substrate 110 and the side surface thereof contacting the third light-emitting device 130c. The isolation layer is an inorganic film layer and can be formed by chemical vapor deposition (CVD). The isolation layer can be used to prevent the photoluminescent materials in the first photoluminescent unit 141a, the second photoluminescent unit 141b and the third photoluminescent unit 141c from penetrating into the light-emitting functional layer 132 of the corresponding first light-emitting device 130a, the second light-emitting device 130b and the third light-emitting device 130c, thereby avoiding the problem that the photoluminescent structure 140 affects the display effect and life of the display panel 10.

[0057] In the display panel 10 provided in one embodiment of the present disclosure, the display panel 10 further includes a planar layer 170 located between the substrate 110 and the light emitting device 130 , and the photoluminescent structure 140 is located in the planar layer 170 .

[0058] For example, Figure 6 As shown, the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, and a pixel defining layer 120 located on the flat layer 170. The pixel defining layer 120 defines a plurality of pixel openings 121 for limiting a plurality of light-emitting devices 130, such as a first light-emitting device 130a, a second light-emitting device 130b, and a third light-emitting device 130c. The display panel 10 also includes a photoluminescent structure 140, which is located in the flat layer 170 and includes a plurality of first photoluminescent units 141a, a second photoluminescent unit 141b, and a third photoluminescent unit 141c. Each photoluminescent unit 141 is located in the non-luminescent area 10b, and its orthographic projection on the substrate 110 surrounds the orthographic projection of the corresponding light-emitting device 130 on the substrate 110. Specifically, the orthographic projection of the first photoluminescent unit 141a on the substrate 110 surrounds the orthographic projection of the adjacent first light-emitting device 130a on the substrate 110, the orthographic projection of the second photoluminescent unit 141b on the substrate 110 surrounds the orthographic projection of the adjacent second light-emitting device 130b on the substrate 110, and the orthographic projection of the third photoluminescent unit 141c on the substrate 110 surrounds the orthographic projection of the adjacent third light-emitting device 130c on the substrate 110.

[0059] For example, Figure 7 As shown, the structure of the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, a plurality of light-emitting devices 130, and a photoluminescent structure 140. The photoluminescent structure 140 is divided into two types, namely a first type of photoluminescent structure 140a and a second type of photoluminescent structure 140b. The first type of photoluminescent structure 140a is located on a side of the flat layer 170 away from the substrate 110 and defines a plurality of pixel openings 121 for limiting the plurality of light-emitting devices 130. The second type of photoluminescent structure 140b is located in the flat layer 170. The design scheme of the first type of photoluminescent structure 140a defining the pixel openings 121 and the second type of photoluminescent structure 140b being located in the flat layer 170 can refer to the above embodiments, and will not be described in detail herein.

[0060] In the display panel of the embodiment of the present disclosure, in the scheme in which a photoluminescent structure is provided in the flat layer, the isolation structure between adjacent photoluminescent units can also be designed with reference to the design scheme in the above embodiment to avoid the problem of optical crosstalk. The specific scheme can refer to the above embodiment and will not be described in detail here.

[0061] In the display panel 10 provided in at least one embodiment of the present disclosure, the photoluminescent structure 140 and the planar layer 170 are an integrated structure. When forming the planar layer 170, the corresponding photoluminescent material is injected into the region where the photoluminescent structure 140 is required to be formed, so that the photoluminescent structure 140 is formed without the need for an additional film layer to design the photoluminescent structure 140, which is not only conducive to achieving a thinner display panel 10, but also saves production processes.

[0062] After defining the design scheme of disposing the photoluminescent structure 140 on the planar layer 170 , the embodiment of the present disclosure is further designed in combination with the structure of the light emitting device 130 .

[0063] In a display panel provided in at least one embodiment of the present disclosure, Figure 6 and Figure 7 As shown, the light emitting device 130 includes a first electrode 131, a light emitting functional layer 132, and a second electrode 133 stacked on a substrate 110, the first electrode 131 is a light shielding electrode, and at least a portion of the orthographic projection of the photoluminescent structure 140 on the substrate 110 is located outside the orthographic projection of the first electrode 131 on the substrate 110. Alternatively, the first electrode 131 is a transparent electrode, and at least a portion of the orthographic projection of the photoluminescent structure 140 on the substrate 110 is located within the orthographic projection of the first electrode 131 on the substrate 110.

[0064] For example, Figure 6 and Figure 7 As shown, the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, and a plurality of light-emitting devices 130 located on the side of the flat layer 170 away from the substrate 110, each light-emitting device 130 includes a stacked first electrode 131 such as an anode, a light-emitting functional layer 132 and a second electrode 133 such as a cathode, the first electrode 131 is located on the flat layer 170, a pixel defining layer 120 or a photoluminescent structure 140 that replaces the pixel defining layer 120 is located on a surface of a portion of the first electrode 131 away from the substrate 110 and a surface of the flat layer 170 away from the substrate 110, and a pixel opening 121 defined by the pixel defining layer 120 or the photoluminescent structure 140 that replaces the pixel defining layer 120 limits the light-emitting functional layer 132 and the second electrode 133.

[0065] In the design scheme that the first electrode 131 is a light shielding electrode, regarding the photoluminescent structure 140 located in the planar layer 170, as shown in FIG. Figure 6As shown, in the direction perpendicular to the substrate 110, the orthographic projection of the first photoluminescent unit 141a on the substrate 110 is outside the orthographic projection of the first electrode 131 of the first light-emitting device 130a on the substrate 110, the orthographic projection of the second photoluminescent unit 141b on the substrate 110 is outside the orthographic projection of the first electrode 131 of the second light-emitting device 130b on the substrate 110, and the orthographic projection of the third photoluminescent unit 141c on the substrate 110 is outside the orthographic projection of the first electrode 131 of the third light-emitting device 130c on the substrate 110. Alternatively, as Figure 7 As shown, in the direction perpendicular to the substrate 110, the entire orthographic projection of the first photoluminescent unit 141a on the substrate 110 is located outside the orthographic projection of the first electrode 131 of the first light-emitting device 130a on the substrate 110. The entire orthographic projection of the second photoluminescent unit 141b on the substrate 110 is located outside the orthographic projection of the first electrode 131 of the second light-emitting device 130b on the substrate 110, and the entire orthographic projection of the third photoluminescent unit 141c on the substrate 110 is located outside the orthographic projection of the first electrode 131 of the third light-emitting device 130c on the substrate 110. In this way, it is prevented that the first electrode 131 completely blocks the photoluminescence of the photoluminescent structure 140 located in the flat layer 170, thereby affecting the effect of reducing the brightness difference between the non-luminescent area 10b and the luminescent area 10a.

[0066] For example, Figure 6 As shown, the first electrodes 131 of the first light emitting device 130a, the second light emitting device 130b and the third light emitting device 130c are all transparent electrodes. In the direction perpendicular to the substrate 110, at least part of the orthographic projection of the first photoluminescent unit 141a on the substrate 110 is located within the orthographic projection of the first electrode 131 of the first light emitting device 130a on the substrate 110, at least part of the orthographic projection of the second photoluminescent unit 141b on the substrate 110 is located within the orthographic projection of the first electrode 131 of the second light emitting device 130b on the substrate 110, and at least part of the orthographic projection of the third photoluminescent unit 141c on the substrate 110 is located within the orthographic projection of the first electrode 131 of the third light emitting device 130c on the substrate 110. In this way, the first electrode 131 of the light emitting device 130 is set as a transparent electrode, so that the first electrode 131 will not block the photoluminescence of the photoluminescent structure 140 located in the flat layer 170.

[0067] It should be noted that the embodiment of the present disclosure is not limited by the structure of the light-emitting device 130 in the display panel 10. For example, the light-emitting functional layer 132 in the light-emitting device 130 may include a light-emitting layer (Emitting Layer, EML) and any one or more of the following layers: a hole injection layer (Hole Inject Layer, HIL), a hole transport layer (Hole Transport Layer, HTL), an electron blocking layer (Electron Blocking Layer, EBL), an electron injection layer (Electron Inject Layer, EIL), an electron transport layer (Electron Transport Layer, ETL), and a hole blocking layer (Hole Blocking Layer, HBL). For example, the anode and cathode in the light-emitting device 130 can also be designed according to actual needs. The above can be designed according to actual needs and will not be repeated here.

[0068] In a display panel 10 provided in an embodiment of the present disclosure, the display panel 10 further includes an encapsulation layer 180 located on a side of the plurality of light-emitting devices 130 away from the substrate 110 . The encapsulation layer 180 includes an organic encapsulation layer 182 . The photoluminescent structure 140 is located in the organic encapsulation layer 182 .

[0069] For example, Figure 8 As shown, the display panel 10 includes a substrate 110, a flat layer 170, a pixel defining layer 120, a light emitting device 130, an encapsulation layer 180 and a photoluminescent structure 140. The flat layer 170 is located on the substrate 110, the pixel defining layer 120 is located on the side of the flat layer 170 away from the substrate 110, and defines a plurality of pixel openings 121, the plurality of pixel openings 121 are used to limit the plurality of light emitting devices 130, and the encapsulation layer 180 is located on the side of the plurality of light emitting devices 130 away from the substrate 110. The encapsulation layer 180 may be a thin film encapsulation layer 180, specifically, the encapsulation layer 180 includes a first inorganic encapsulation layer 181, an organic encapsulation layer 182 and a second inorganic encapsulation layer 183 stacked in sequence, and the photoluminescent structure 140 is located in the organic encapsulation layer 182. Specifically, the first photoluminescent unit 141a, the second photoluminescent unit 141b and the third photoluminescent unit 141c are respectively located in the corresponding non-luminescent area 10b in the organic encapsulation layer 182. The orthographic projection of the first photoluminescent unit 141a on the substrate 110 surrounds the orthographic projection of the corresponding first light-emitting device 130a on the substrate 110, the orthographic projection of the second photoluminescent unit 141b on the substrate 110 surrounds the orthographic projection of the corresponding second light-emitting device 130b on the substrate 110, and the orthographic projection of the third photoluminescent unit 141c on the substrate 110 surrounds the orthographic projection of the corresponding third light-emitting device 130c on the substrate 110.

[0070] For example, Fig. 9 As shown, the structure of the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, a plurality of light-emitting devices 130, a photoluminescent structure 140, and an encapsulation layer 180 located on the side of the light-emitting device 130 away from the substrate 110. The encapsulation layer 180 includes a first inorganic encapsulation layer 181, an organic encapsulation layer 182, and a second inorganic encapsulation layer 183 sequentially stacked on the light-emitting device 130. The photoluminescent structure 140 is divided into two types, namely a first type of photoluminescent structure 140a and a second type of photoluminescent structure 140b. The first type of photoluminescent structure 140a is located on the side of the flat layer 170 away from the substrate 110 and defines a plurality of pixel openings 121 for limiting the plurality of light-emitting devices 130. The second type of photoluminescent structure 140b is located in the organic encapsulation layer 182. The design scheme of the first type of photoluminescent structure 140a and the second type of photoluminescent structure 140b can refer to the above embodiments, and will not be described in detail here.

[0071] For example, Fig.10 As shown, the structure of the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, a pixel defining layer 120 located on the side of the flat layer 170 away from the substrate 110, a plurality of light-emitting devices 130, a photoluminescent structure 140, and an encapsulation layer 180 located on the side of the light-emitting device 130 away from the substrate 110. The encapsulation layer 180 includes a first inorganic encapsulation layer 181, an organic encapsulation layer 182, and a second inorganic encapsulation layer 183 sequentially stacked on the light-emitting device 130. The photoluminescent structure 140 is divided into two types, namely a first type of photoluminescent structure 140a and a second type of photoluminescent structure 140b. The first type of photoluminescent structure 140a is located in the flat layer 170, and the second type of photoluminescent structure 140b is located in the organic encapsulation layer 182. The design scheme that the first type of photoluminescent structure 140 a is located in the planar layer 170 and the second type of photoluminescent structure 140 b is located in the organic encapsulation layer 182 can refer to the above embodiments and will not be elaborated herein.

[0072] For example, Fig.11As shown, the structure of the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, a plurality of light-emitting devices 130, a photoluminescent structure 140, and an encapsulation layer 180 located on the side of the light-emitting device 130 away from the substrate 110. The encapsulation layer 180 includes a first inorganic encapsulation layer 181, an organic encapsulation layer 182, and a second inorganic encapsulation layer 183 sequentially stacked on the light-emitting device 130. The photoluminescent structure 140 is divided into three categories, namely, a first type of photoluminescent structure 140a, a second type of photoluminescent structure 140b, and a third type of photoluminescent structure 140c. The first type of photoluminescent structure 140a is located in the flat layer 170, the second type of photoluminescent structure 140b is located on the side of the flat layer 170 away from the substrate 110, and defines a plurality of pixel openings 121 for limiting the plurality of light-emitting devices 130, and the third type of photoluminescent structure 140c is located in the organic encapsulation layer 182. The design scheme that the first type photoluminescent structure 140a is located in the planar layer 170, the second type photoluminescent structure 140b defines the pixel opening 121, and the third type photoluminescent structure 140c is located in the organic encapsulation layer 182 can refer to the above embodiments and will not be elaborated herein.

[0073] In the display panel in the embodiments of the present disclosure, in the scheme where a photoluminescent structure is provided in the flat layer and / or the encapsulation layer, the isolation structure between adjacent photoluminescent units can also be designed with reference to the design scheme in the above embodiments to avoid the problem of optical crosstalk. The specific scheme can refer to the above embodiments and will not be described in detail here.

[0074] In the display panel 10 provided by at least one embodiment of the present disclosure, the photoluminescent structure 140 is an integrated structure with the organic encapsulation layer 182. During the preparation of the encapsulation layer 180, the photoluminescent structure 140 is formed by injecting corresponding photoluminescent materials into corresponding regions while forming the organic encapsulation layer 182, thereby saving production costs without increasing the thickness of the display panel 10 in a direction perpendicular to the substrate 110.

[0075] In the display panel 10 provided in one embodiment of the present disclosure, scattering particles are distributed in the photoluminescent structure 140. Scattering particles refer to particles that can scatter light, and the scattering particles can be transparent particles. The scattering particles can further scatter the light emitted by the photoluminescent structure 140, thereby increasing the brightness of the entire non-luminescent area 10b, reducing the brightness difference between the luminescent area 10a and the non-luminescent area 10b, and thus improving the screen window phenomenon of the display panel 10.

[0076] It should be noted that the scattering particles may be evenly distributed in the photoluminescent structure 140 , or may be arranged according to actual conditions, which will not be elaborated herein.

[0077] In the embodiment of the present disclosure, the display panel 10 may be an organic light emitting diode display panel 10 , a liquid crystal display panel 10 , an electronic paper display panel 10 , or the like.

[0078] It should be noted that the embodiment of the present disclosure does not describe all structures of the above-mentioned display panel 10. To realize the necessary functions of the display panel 10, those skilled in the art may set other structures according to specific application scenarios.

[0079] In addition to providing the photoluminescent structure 140 in the planar layer 170 to improve the brightness of the non-luminescent area 10 b of the display panel 10 , other structures such as a thermochromic structure 190 may also be provided in the planar layer 170 . The specific solution is as follows.

[0080] In the display panel 10 provided in one embodiment of the present disclosure, the display panel 10 further includes a flat layer 170 located between the substrate 110 and the light emitting device 130 and a thermochromic structure 190 disposed in the flat layer 170. The color of the light emitted by the thermochromic structure 190 is consistent with the color of the light emitted by the light emitting device 130 adjacent to the thermochromic structure 190. In this way, the thermochromic structure 190 emits light using the heat generated when the adjacent light emitting device 130 emits light, which not only increases the brightness of the non-luminous area 10b and reduces the brightness difference between the non-luminous area 10b and the light emitting area 10a, but also reduces the risk of the heat generated by the light emitting device 130 having an adverse effect on the display panel 10.

[0081] For example, Fig.12As shown, the display panel 10 includes a substrate 110, a flat layer 170 located on the substrate 110, a photoluminescent structure 140, a plurality of light-emitting devices 130 and an encapsulation layer 180. The photoluminescent structure 140 defines a plurality of pixel openings 121 for limiting the plurality of light-emitting devices 130. The corresponding non-luminescent area 10b in the flat layer 170 is provided with a thermochromic structure 190, which includes a first thermochromic structure 191, a second thermochromic structure 192 and a third thermochromic structure 193. The orthographic projection of the first thermochromic structure 191 on the substrate 110 surrounds the orthographic projection of the first light-emitting device 130a on the substrate 110, and the thermochromic light thereof has the same color as the light emitted by the first light-emitting device 130a, for example, both are red light. The orthographic projection of the second thermochromic structure 192 on the substrate 110 surrounds the orthographic projection of the second light emitting device 130b on the substrate 110, and the color of its thermochromic light is the same as the color of the light emitted by the second light emitting device 130b, for example, both are green light. The orthographic projection of the third thermochromic structure 193 on the substrate 110 surrounds the orthographic projection of the third light emitting device 130c on the substrate 110, and the color of its thermochromic light is the same as the color of the light emitted by the third light emitting device 130c, for example, both are blue light. At the same time, the first thermochromic structure 191, the second thermochromic structure 192 and the third thermochromic structure 193 are configured not to crosstalk with each other.

[0082] It should be noted that the structure of the display panel 10 disclosed in the present invention is not limited to the above examples. For example, the adjacent thermochromic structures 190 in the display panel 10 can refer to the isolation structure 150 provided in the photoluminescent structure 140 in this embodiment to achieve no crosstalk. For example, the display panel 10 may also include an encapsulation layer 180, and the photoluminescent structure 140 is also provided in the organic encapsulation layer 182 of the encapsulation layer 180. For another example, the display panel 10 may also include a pixel defining layer 120 and an encapsulation layer 180, the photochromic structure is provided in the organic encapsulation layer 182 of the encapsulation layer 180, and the thermochromic structure 190 may be provided in the flat layer 170 or the pixel defining layer 120. All of the above can be designed according to actual needs and will not be described in detail here.

[0083] In the display panel 10 provided in at least one embodiment, the thermochromic structure 190 and the planar layer 170 are an integrated structure, which is conducive to realizing the lightness and thinness of the display panel 10 and also saves the production cost.

[0084] The present disclosure provides a VR device, which includes a display panel of the above embodiment. The VR device can be VR glasses, VR helmets, etc. The display panel in the VR device makes the boundary between the luminous area and the non-luminous area weaker during the experience, thereby reducing the adverse effects of the screen effect on the user's visual experience.

[0085] It should be noted that the disclosed embodiments do not specifically limit the structure of the VR device. For example, the VR device may also include other structures such as lenses. The display panel is arranged correspondingly to the lenses and generates corresponding images. When the user wears the VR device, the eyes obtain the corresponding image information and generate a three-dimensional sense in the mind. In addition to the above structure, the VR device may also include other structures, which are subject to actual applications and will not be described in detail here.

[0086] In one embodiment of the present disclosure, a method for manufacturing a display panel is provided, wherein the display panel has a display area, and the display area includes a light-emitting area and a non-light-emitting area, such as Fig.13 As shown, the preparation method comprises the following steps:

[0087] Step S01: providing a substrate.

[0088] Step S02: forming a plurality of first electrodes on the substrate, wherein the first electrodes are formed in the light emitting area.

[0089] Step S03: preparing a photoluminescent structure, wherein the photoluminescent structure is formed in the non-luminescent area and comprises a plurality of photoluminescent units, wherein the photoluminescent units form a plurality of pixel openings respectively corresponding to the first electrodes.

[0090] Step S04: A light-emitting functional layer and a second electrode are sequentially formed in the pixel opening. The first electrode, the light-emitting functional layer and the second electrode stacked on each other at the pixel opening form a light-emitting device. The color of the light emitted by the light-emitting functional layer in each pixel opening is consistent with the color of the photoluminescence of the corresponding surrounding photoluminescent unit.

[0091] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that: A display panel having a display area, the display area including a light-emitting area and a non-light-emitting area, wherein the display panel comprises: substrate; A plurality of light emitting devices are located in the light emitting area; and The photoluminescent structure is arranged in the non-luminescent area and includes a plurality of photoluminescent units, wherein the photoluminescent units correspond to the light-emitting devices respectively and surround the corresponding light-emitting devices, and the color of the photoluminescent light of the photoluminescent units is consistent with the color of the light emitted by the adjacent light-emitting devices.

2. The display panel according to claim 1, characterized in that: The photoluminescent unit defines a pixel opening, and the pixel opening limits the light emitting device; Preferably, the orthographic projection of the photoluminescent unit on the substrate is a closed ring.

3. The display panel according to claim 2, characterized in that: An isolation structure is provided between adjacent photoluminescent units; Preferably, the isolation structure is a light absorbing layer or a light reflecting layer.

4. The display panel according to claim 2, characterized in that: A barrier layer is provided on the side and top surfaces of the photoluminescent structure; Preferably, the barrier layer is an inorganic film layer.

5. The display panel according to claim 1, characterized in that: Also includes: a planar layer, located between the substrate and the light-emitting device, wherein the photoluminescent structure is located in the planar layer; Preferably, the photoluminescent structure and the planar layer are an integrated structure; Preferably, the light emitting device comprises a first electrode, a light emitting functional layer and a second electrode stacked on the substrate, and The first electrode is a light-shielding electrode, and at least a portion of the orthographic projection of the photoluminescent structure on the substrate is located outside the orthographic projection of the first electrode on the substrate; or The first electrode is a transparent electrode, and at least a portion of an orthographic projection of the photoluminescent structure on the substrate is located within the orthographic projection of the first electrode on the substrate.

6. The display panel according to claim 1, characterized in that: Also includes: an encapsulation layer, located on a side of the light-emitting device away from the substrate, the encapsulation layer comprising an organic encapsulation layer, wherein the photoluminescent structure is located in the organic encapsulation layer; Preferably, the photoluminescent structure and the organic encapsulation layer are an integrated structure.

7. The display panel according to any one of claims 1 to 6, characterized in that: Scattering particles are distributed in the photoluminescent structure.

8. The display panel according to claim 1, characterized in that: Also includes: A planar layer, located between the substrate and the light-emitting device; as well as A thermochromic structure is disposed in the planar layer, and the color of light emitted by the thermochromic structure is consistent with the color of light emitted by a light-emitting device adjacent to the thermochromic structure; Preferably, the thermochromic structure and the planar layer are an integral structure.

9. A VR device, characterized in that: A display panel comprising any one of claims 1-8.

10. A method for preparing a display panel, characterized in that: The display panel has a display area, the display area includes a light-emitting area and a non-light-emitting area, and the preparation method includes: providing a substrate; forming a plurality of first electrodes on the substrate, wherein the first electrodes are formed in the light emitting area; Prepare a photoluminescent structure, wherein the photoluminescent structure is formed in the non-luminescent area and comprises a plurality of photoluminescent units, wherein the photoluminescent units form a plurality of pixel openings respectively corresponding to the first electrodes; A light-emitting functional layer and a second electrode are sequentially formed in the pixel opening, and the first electrode, the light-emitting functional layer and the second electrode stacked on each other at the pixel opening form a light-emitting device, and the color of the light emitted by the light-emitting functional layer in each pixel opening is consistent with the color of the photoluminescence of the corresponding surrounding photoluminescent unit.

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