Display device and display device

Abstract

The utility model discloses a display device and a display device, and the display device comprises a pixel definition layer which is located at one side of a substrate; the pixel definition layer comprises a plurality of grooves, and each groove penetrates through the substrate; the light-emitting unit layers are located in the grooves respectively; the first inorganic layer is located on the side, away from the substrate, of the light-emitting unit layer; the first inorganic layer covers the light-emitting unit layer, the side wall of the groove and the surface, away from the substrate, of the pixel definition layer; the first organic layer is located in the groove; the first organic layer covers the first inorganic layer on the side wall of the groove and the first inorganic layer on the light-emitting unit layer, and the surface, away from the substrate, of the first organic layer is provided with protrusions. The optical waveguide effect and total reflection can be reduced, and the light extraction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a display device and a display apparatus. Background Art

[0002] An organic light-emitting diode (OLED) is a self-luminous display device, which has the advantages of low power consumption, wide viewing angle and fast response speed. In addition, the most remarkable feature is that it is thin, light and can achieve flexible display, and has a wide range of applications in the fields of portable electronic devices, wearable electronic devices, vehicle-mounted electronic devices, etc. However, the lifespan of OLEDs is affected by the intrusion of water vapor and oxygen, resulting in dark spots in OLEDs and significant impact on light-emitting devices. Therefore, effective encapsulation of OLEDs is required. Among them, the internal quantum efficiency of OLEDs is close to 100%. At present, the external coupling efficiency of display devices after the light emitted by OLEDs is refracted by materials with different refractive indexes such as the cathode and the thin film encapsulation layer is low, resulting in optical losses. Summary of the Utility Model

[0003] The utility model provides a display device and a display apparatus, which can reduce the optical waveguide effect and total reflection and improve the light extraction efficiency.

[0004] According to one aspect of the utility model, a display device is provided, including:

[0005] A pixel definition layer located on one side of a substrate; the pixel definition layer includes a plurality of grooves, and each groove penetrates through the substrate;

[0006] A light-emitting unit layer located inside each groove;

[0007] A first inorganic layer located on the side of the light-emitting unit layer away from the substrate; the first inorganic layer covers the light-emitting unit layer, the side walls of the grooves and the surface of the pixel definition layer away from the substrate;

[0008] A first organic layer located inside the grooves, the first organic layer is located on the side of the first inorganic layer away from the substrate; the first organic layer covers the first inorganic layer on the side walls of the grooves and the first inorganic layer on the light-emitting unit layer, and the surface of the first organic layer away from the substrate has a protrusion.

[0009] Optionally, the light-emitting unit layer includes a plurality of light-emitting sub-pixels;

[0010] One light-emitting sub-pixel corresponds to each groove, one first organic layer corresponds to each light-emitting sub-pixel, the surface of the protrusion away from the substrate is a spherical surface, and the spherical surface protrudes outward in the direction away from the substrate.

[0011] Optionally, the vertical projection of the first organic layer on the substrate covers the vertical projection of the light-emitting unit layer on the substrate.

[0012] Optionally, the display device further includes:

[0013] The encapsulation structure is located on the side of the first organic layer away from the substrate, and the encapsulation structure covers the surface of the first organic layer and the first inorganic layer not covered by the first organic layer.

[0014] Optionally, the encapsulation structure includes a second organic layer and a second inorganic layer arranged in a stacked manner, and the second inorganic layer is located on the side of the second organic layer away from the substrate;

[0015] The refractive index of the first organic layer is less than that of the second organic layer.

[0016] Optionally, the encapsulation structure further includes a third inorganic layer arranged in a stacked manner, and the third inorganic layer is located between the first organic layer and the second organic layer; the third inorganic layer covers the first organic layer and the first inorganic layer not covered by the first organic layer.

[0017] Optionally, the substrate includes a substrate and a driving circuit layer, and the substrate is located on the side of the driving circuit layer away from the pixel defining layer; the driving circuit layer is used to drive the light-emitting unit layer to emit light.

[0018] Optionally, along the first direction, the maximum dimension of the bottom of the groove is less than the maximum dimension of the top of the groove, and the first direction is parallel to the substrate.

[0019] According to another aspect of the present invention, a display device is provided, including the display device described in any embodiment of the present invention.

[0020] The display device provided by the technical solution of the embodiment of the present invention includes: a pixel defining layer located on one side of the substrate; the pixel defining layer includes a plurality of grooves, each groove penetrating through the substrate; a light-emitting unit layer located inside each groove; a first inorganic layer located on the side of the light-emitting unit layer away from the substrate; the first inorganic layer covers the light-emitting unit layer, the side walls of the grooves, and the surface of the pixel defining layer away from the substrate; a first organic layer located inside the grooves, and the first organic layer is located on the side of the first inorganic layer away from the substrate; the first organic layer covers the first inorganic layer on the side walls of the grooves and the first inorganic layer on the light-emitting unit layer, and the surface of the first organic layer away from the substrate has a protrusion, and the protrusion can reduce the angle of the ray whose original incident angle is greater than the critical angle, so as to reduce the optical waveguide effect and total reflection, and can increase the angle range of the light emitted from the first organic layer, so that more light is emitted and the light extraction efficiency is improved.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a display device provided by an embodiment of the present utility model.

[0024] Figure 2 It is a schematic structural diagram of another display device provided by an embodiment of the present utility model.

[0025] Figure 3 It is a schematic structural diagram of another display device provided by an embodiment of the present utility model.

[0026] Figure 4 It is a schematic structural diagram of another display device provided by an embodiment of the present utility model. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that the terms "first", "second", etc. in the present utility model are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] An embodiment of the present utility model provides a display device. Figure 1 It is a schematic structural diagram of a display device provided by an embodiment of the present utility model. Refer to Figure 1 , the display device includes:

[0030] The pixel definition layer 20 is located on one side of the substrate 10; the pixel definition layer 20 includes a plurality of grooves 21, and each groove 21 penetrates through to the substrate 10; the light-emitting unit layer 30 is located inside each groove 21; the first inorganic layer 40 is located on the side of the light-emitting unit layer 30 away from the substrate 10; the first inorganic layer 40 covers the light-emitting unit layer 30, the side walls of the grooves 21, and the surface of the pixel definition layer 20 away from the substrate 10; the first organic layer 50 is located inside the grooves 21, and the first organic layer 50 is located on the side of the first inorganic layer 40 away from the substrate 10; the first organic layer 50 covers the first inorganic layer 40 on the side walls of the grooves 21 and the first inorganic layer 40 on the light-emitting unit layer 30, and the surface of the first organic layer 50 away from the substrate 10 has a protrusion.

[0031] Among them, the display device can be a flexible display device. Exemplarily, the flexible display device can be an organic light-emitting diode. The substrate 10 can include a substrate and a driving circuit layer, and the driving circuit layer is used to drive the light-emitting unit layer 30 to emit light; the light-emitting unit layer 30 can be an organic light-emitting unit layer, and the light-emitting unit layer 30 can include a plurality of light-emitting sub-pixels. Exemplarily, the light-emitting sub-pixels can be red light-emitting sub-pixels, green light-emitting sub-pixels, or red light-emitting sub-pixels; the pixel definition layer 20 includes a plurality of grooves 21, and the grooves 21 extend from the surface of the pixel definition layer 20 away from the substrate 10 into the pixel definition layer 20; one light-emitting sub-pixel corresponds to each groove; the pixel definition layer 20 can define the area of the light-emitting unit layer 30.

[0032] The material of the first inorganic layer 40 includes materials such as SiNx, SiOx, SiOxNy, AlOx, or TiOx. The first inorganic layer 40 can be formed on the side of the light-emitting unit layer 30 away from the substrate 10 by plasma-enhanced chemical vapor deposition (PECVD); the first inorganic layer 40 can be used to block water vapor and oxygen, protect the light-emitting unit layer 30, and reduce the influence of water and oxygen on the light-emitting unit layer 30. One first organic layer 50 corresponds to each light-emitting sub-pixel. The material of the first organic layer 50 includes materials such as acrylic, epoxy resin, or silicone resin. It can be ink-jet printed on the side of the first inorganic layer 40 away from the substrate 10, and a protrusion is cured on the surface of the first organic layer 50 away from the substrate 10. Forming a protrusion by patterning the first organic layer 50 can improve the light extraction efficiency; the first inorganic layer 40 and the first organic layer 50 are a thin-film encapsulation structure of the display device, which can protect the display device from the influence of water vapor and oxygen and improve the airtightness of the encapsulation. The surface of the first organic layer 50 away from the substrate 10 has a protrusion. Exemplarily, the protrusion can be a spherical surface, forming a microlens structure, which can reduce the angle of rays whose original incident angle is greater than the critical angle, thereby reducing the optical waveguide effect and total reflection, increasing the emitted light, and improving the light extraction efficiency.

[0033] The display device provided by the technical solution of the embodiment of the present utility model includes: a pixel definition layer 20, the pixel definition layer 20 is located on one side of the substrate 10; the pixel definition layer 20 includes a plurality of grooves 21, and each groove 21 penetrates through to the substrate 10; a light-emitting unit layer 30, the light-emitting unit layer 30 is located inside each groove 21; a first inorganic layer 40, the first inorganic layer 40 is located on the side of the light-emitting unit layer 30 away from the substrate 10; the first inorganic layer 40 covers the light-emitting unit layer 30, the side walls of the grooves 21, and the surface of the pixel definition layer 20 away from the substrate 10; a first organic layer 50, the first organic layer 50 is located in the groove 21, and the first organic layer 50 is located on the side of the first inorganic layer 40 away from the substrate 10; the first organic layer 50 covers the first inorganic layer 40 on the side walls of the grooves 21 and the first inorganic layer 40 on the light-emitting unit layer 30, and the surface of the first organic layer 50 away from the substrate 10 has a protrusion, and the protrusion can reduce the angle of the ray whose original incident angle is greater than the critical angle, so as to reduce the waveguide effect and reduce total reflection, and can increase the angle range of the light emitted from the first organic layer 50, so that more light is emitted, and the light extraction efficiency is improved.

[0034] Optionally, referring to Figure 1 , the light-emitting unit layer 30 includes a plurality of light-emitting sub-pixels; one light-emitting sub-pixel corresponds to each groove 21, one first organic layer 50 corresponds to each light-emitting sub-pixel, the surface of the protrusion away from the substrate 10 is a spherical surface, and the spherical surface protrudes outward in the direction away from the substrate 10.

[0035] Among them, the spherical surface protruding outward in the direction away from the substrate 10 can increase the angle range of the light emitted from the first organic layer 50, and the spherical surface is a uniformly symmetric surface, so that the display device emits light uniformly in all directions, and can reduce the angle of the ray whose original incident angle is greater than the critical angle, so as to reduce the waveguide effect and reduce total reflection, and can increase the angle range of the light emitted from the first organic layer 50, so that more light is emitted, and the light extraction efficiency is improved.

[0036] Optionally, referring to Figure 1 , the vertical projection of the first organic layer 50 on the substrate 10 covers the vertical projection of the light-emitting unit layer 30 on the substrate 10.

[0037] Among them, the vertical projection of the first organic layer 50 on the substrate 10 at least covers the vertical projection of the light-emitting unit layer 30 on the substrate 10. The first direction X is the direction parallel to the substrate. The larger the size of the top of the groove 21 in the first direction X, the larger the angle range of the light emitted from the first organic layer 50, and the more light is emitted, further improving the light extraction efficiency; the closer the angle A between the surface of the first organic layer 50 away from the substrate 10 and the plane of the first direction X is to 90°, the higher the light extraction efficiency.

[0038] Optionally, Figure 2It is a schematic structural diagram of another display device provided by an embodiment of the present invention. Refer to Figure 2 , the display device further includes: a packaging structure 60, the packaging structure 60 is located on the side of the first organic layer 50 away from the substrate 10, and the packaging structure 60 covers the surfaces of the first organic layer 50 and the first inorganic layer 40 not covered by the first organic layer.

[0039] Among them, the packaging structure 60 is used to block moisture and oxygen, and further improve the airtightness of the packaging.

[0040] Optionally, Figure 3 It is a schematic structural diagram of another display device provided by an embodiment of the present invention. Refer to Figure 3 , the packaging structure 60 includes a second organic layer 61 and a second inorganic layer 62 arranged in layers, and the second inorganic layer 62 is located on the side of the second organic layer 61 away from the substrate 10; the refractive index of the first organic layer 50 is less than the refractive index of the second organic layer 61.

[0041] Among them, Figure 3 the second organic layer 61 in covers the first organic layer 50 and the first inorganic layer 40 not covered by the first organic layer 50, and the second inorganic layer 62 covers the second organic layer 61; the second organic layer 61 is a planarization layer, and the distance between the surface of the second organic layer 61 away from the substrate 10 and the substrate 10 is the same; the refractive indices of the first organic layer 50 and the second organic layer 61 are different. The first organic layer 50 can have a low refractive index, and the second organic layer 61 can have a high refractive index. The refractive index of the first organic layer 50 is less than the refractive index of the second organic layer 61. When the light emitted by the light-emitting unit layer 30 enters the second organic layer 61 from the first organic layer 50, the light can be refracted in the second organic layer 61, changing the propagation direction of the light, increasing the range of the light emission angle, and improving the light extraction efficiency; the packaging structure 60 is a thin-film packaging structure outside the first organic layer 50 and the first inorganic layer 40, which can further isolate moisture and oxygen, protect the display device, and further improve the airtightness of the display device.

[0042] Optionally, Figure 4 It is a schematic structural diagram of another display device provided by an embodiment of the present invention. Refer to Figure 4 , the packaging structure 60 further includes a third inorganic layer 63 arranged in layers, and the third inorganic layer 63 is located between the first organic layer 50 and the second organic layer 61; the third inorganic layer 63 covers the first organic layer 50 and the first inorganic layer 40 not covered by the first organic layer 50.

[0043] Among them, in this embodiment, the encapsulation structure 60 includes a third inorganic layer 63, a second organic layer 61, and a second inorganic layer 62 which are stacked; the third inorganic layer 63 can be formed by coating on the first organic layer 50; the third inorganic layer 63 covers the first organic layer 50 and the first inorganic layer 40 not covered by the first organic layer 50, the second organic layer 61 covers the third inorganic layer 63, and the second inorganic layer 62 covers the second organic layer 61; the third inorganic layer 63 can be a planarization layer, and the distance between the surface of the third inorganic layer 63 away from the substrate 10 and the substrate 10 is the same; the third inorganic layer 63 can further isolate water vapor and oxygen to protect the display device.

[0044] Optionally, the substrate includes a substrate and a driving circuit layer, and the substrate is located on the side of the driving circuit layer away from the pixel defining layer; the driving circuit layer is used to drive the light-emitting unit layer to emit light.

[0045] Among them, the driving circuit layer includes a plurality of pixel driving circuits, and the pixel driving circuits are arranged in one-to-one correspondence with the light-emitting sub-pixels, and the pixel driving circuits are used to drive the light-emitting sub-pixels to emit light.

[0046] Optionally, referring to Figures 1-4 , along the first direction X, the maximum dimension of the bottom of the groove 21 is smaller than the maximum dimension of the top of the groove 21, and the first direction X is a direction parallel to the substrate.

[0047] Among them, the bottom of the groove 21 is flush with the surface of the pixel defining layer 20 adjacent to the substrate, and the top of the groove 21 is flush with the surface of the pixel defining layer 20 away from the substrate; the larger the maximum dimension of the top of the groove 21, the larger the angular range of the emitted light, so that the emitted light increases and the light extraction efficiency is improved.

[0048] Based on the above embodiment, the embodiment of the present invention provides a display device, including the display device described in any embodiment of the present invention.

[0049] The display device provided by the embodiment of the present invention and the display device described in any embodiment of the present invention have the same beneficial effects.

[0050] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0051] The above specific embodiments do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A display device, characterized in that, Comprising: A pixel definition layer located on one side of a substrate; the pixel definition layer includes a plurality of grooves, and each groove penetrates through to the substrate; A light-emitting unit layer located inside each groove; A first inorganic layer located on the side of the light-emitting unit layer away from the substrate; the first inorganic layer covers the light-emitting unit layer, the side walls of the grooves, and the surface of the pixel definition layer away from the substrate; A first organic layer located inside the groove, the first organic layer being on the side of the first inorganic layer away from the substrate; the first organic layer covers the first inorganic layer on the side walls of the groove and the first inorganic layer on the light-emitting unit layer, and the surface of the first organic layer away from the substrate has a protrusion.

2. The display device according to claim 1, wherein: The light-emitting unit layer includes a plurality of light-emitting sub-pixels; One light-emitting sub-pixel corresponds to each groove, one first organic layer corresponds to each light-emitting sub-pixel, the surface of the protrusion away from the substrate is a spherical surface, and the spherical surface protrudes outward in the direction away from the substrate.

3. The display device according to claim 2, wherein: The vertical projection of the first organic layer on the substrate covers the vertical projection of the light-emitting unit layer on the substrate.

4. The display device according to claim 1, wherein Further comprising: A packaging structure located on the side of the first organic layer away from the substrate, the packaging structure covering the first organic layer and the surface of the first inorganic layer not covered by the first organic layer.

5. The display device according to claim 4, wherein: The packaging structure includes a second organic layer and a second inorganic layer stacked, and the second inorganic layer is on the side of the second organic layer away from the substrate; The refractive index of the first organic layer is less than the refractive index of the second organic layer.

6. The display device according to claim 5, wherein: The packaging structure further includes a third inorganic layer stacked, and the third inorganic layer is between the first organic layer and the second organic layer; the third inorganic layer covers the first organic layer and the first inorganic layer not covered by the first organic layer.

7. The display device according to claim 1, wherein: The substrate includes a substrate and a driving circuit layer, the substrate being on the side of the driving circuit layer away from the pixel definition layer; the driving circuit layer is used to drive the light-emitting unit layer to emit light.

8. The display device according to claim 1, wherein: Along a first direction, the maximum dimension of the bottom of the groove is less than the maximum dimension of the top of the groove, and the first direction is parallel to the substrate.

9. A display device, characterized in that, Including the display device according to any one of claims 1-8.

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