Display panel and display device

Abstract

This utility model discloses a display panel and a display device. The display panel includes: a substrate; a display functional layer disposed on one side of the substrate, which emits light to a side away from the substrate; a scattering layer disposed on the side of the display functional layer away from the substrate, which scatters the light emitted by the display functional layer; and an encapsulation layer disposed on the side of the scattering layer away from the substrate, wherein the side of the encapsulation layer near the substrate includes a plurality of arrayed protrusion units, which converge the light scattered by the scattering layer. The technical solution provided by this utility model provides a scattering layer on the surface of the display functional layer away from the substrate. When the light emitted by the display functional layer passes through the scattering layer, it is diffused to more directions. The diffused light is refocused when passing through the protrusion units of the encapsulation layer, thereby improving the brightness of the display panel, preventing uneven brightness of the display panel, and improving the display effect of the display panel.

Description

Technical Field

[0001] This utility model relates to the field of display panel technology, and in particular to a display panel and a display device. Background Technology

[0002] Currently, OLED (Organic Light-Emitting Diode) display technology has gained widespread market acceptance due to its advantages such as fast response time, high contrast ratio, wide viewing angle, and ultra-light and ultra-thin design. However, because its light-emitting units are independent, the differences in quality among the units lead to significant uncertainties in color uniformity. There is an urgent need to improve the uniformity of display panel products and enhance their display performance. Utility Model Content

[0003] This utility model provides a display panel and a display device to improve the uniformity of display panel products and enhance the display effect of the products.

[0004] According to a first aspect of the present invention, a display panel is provided, comprising:

[0005] Base;

[0006] A display functional layer is disposed on one side of the substrate, and the display functional layer emits light to the side away from the substrate;

[0007] A scattering layer is disposed on the side of the display functional layer away from the substrate, and the scattering layer is used to scatter the light emitted by the display functional layer;

[0008] An encapsulation layer is disposed on the side of the scattering layer away from the substrate. The side of the encapsulation layer close to the substrate includes a plurality of arrayed protrusion units, which are used to converge the light scattered by the scattering layer.

[0009] Optionally, the scattering layer includes a plurality of scattering units arranged in an array, the scattering units being used to scatter the light emitted by the display functional layer; the scattering layer is also used to bond the display functional layer and the encapsulation layer.

[0010] Optionally, the encapsulation layer includes a glass cover or a rigid film; the protruding unit includes a pyramidal structure or a prism structure, and the protruding unit is used to converge the light scattered by the scattering layer.

[0011] Optionally, the scattering unit is polygonal or spherical; the scattering unit includes multiple holes.

[0012] Optionally, the display function layer includes a pixel definition layer and a driving circuit layer;

[0013] The driving circuit layer is disposed on one side of the substrate, and the pixel definition layer is disposed on the side of the driving circuit layer away from the substrate;

[0014] The pixel definition layer includes sub-pixel openings.

[0015] Optionally, the driving circuit layer includes: a plurality of thin-film transistors and a first electrode layer;

[0016] The first electrode layer is located between the thin-film transistor and the pixel definition layer, and the first electrode layer includes a plurality of first electrodes, with the sub-pixel opening exposing a portion of the first electrodes;

[0017] The first electrode is connected to the thin-film transistor through a conductive hole.

[0018] Optionally, the driving circuit layer further includes: multiple data signal lines.

[0019] The data signal line is disposed in the driving circuit layer, and the data signal line is used to transmit data voltage.

[0020] Optionally, the display panel further includes a buffer layer disposed on the side of the display functional layer near the substrate, the buffer layer being used to protect the display functional layer.

[0021] According to a second aspect of the present invention, a display device is also provided, comprising the display panel described in any one of the first aspects.

[0022] The technical solution provided by this embodiment of the invention involves setting a scattering layer on the surface of the display functional layer away from the substrate. Light emitted from the display functional layer is diffused in more directions when passing through the scattering layer. The diffused light is then refocused upon passing through the protruding units of the encapsulation layer and emitted from the encapsulation layer. This technical solution can improve the brightness of the display panel, prevent uneven brightness, and enhance the display effect.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a display panel provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of another display panel provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of another display panel provided by this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of a scattering unit of a display panel provided by this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of a raised unit of a display panel provided by this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of another display panel provided by this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of another display panel provided by this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of another display panel provided by this utility model. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] Figure 1 This is a schematic diagram of the structure of a display panel provided by this utility model. Figure 1 As shown, the display panel includes: a substrate 100; a display functional layer 200 disposed on one side of the substrate 100, the display functional layer 200 emitting light to the side away from the substrate 100; a scattering layer 300 disposed on the side of the display functional layer 200 away from the substrate 100, the scattering layer 300 scattering the light emitted by the display functional layer 200; and an encapsulation layer 400 disposed on the side of the scattering layer 300 away from the substrate 100, the encapsulation layer 400 including a plurality of arrayed protrusion units 410 on the side near the substrate 100, the protrusion units 410 converging the light scattered by the scattering layer 300.

[0036] Specifically, the substrate 100 is disposed at the bottom layer of the display panel and can be used to support other film layers of the display panel. The substrate 100 can be flexible glass or flexible polymer. The display functional layer 200 is provided with organic light-emitting material and can be disposed on one side of the surface of the substrate 100. The organic light-emitting material of the display functional layer 200 can emit light away from the substrate 100 under the action of an electric field. The scattering layer 300 can be disposed on the surface of the display functional layer 200 away from the substrate 100. The scattering layer 300 can be a transparent material with good light transmittance. The light emitted by the display functional layer 200 can be scattered when passing through the scattering layer 300, spreading the light emitted by the display functional layer 200 to more directions. The encapsulation layer 400 can be a structure disposed at the top layer of the display panel. The side of the encapsulation layer 400 away from the substrate 100, as the light-emitting side of the display panel, can be set as a smooth surface, and the side closer to the scattering layer 300 is the light-incident side, which is provided with multiple arrayed protrusion units 410. When the light scattered by the scattering layer 300 passes through the raised unit 410, it is refocused by the raised unit 410. In other words, the raised unit 410 gathers the light diffused by the scattering layer 300 and emits it from the light-emitting side of the encapsulation layer 400, thereby improving the brightness of the display panel, preventing uneven brightness of the display panel, and improving the display effect of the display panel.

[0037] The technical solution provided by this embodiment of the invention involves setting a scattering layer on the surface of the display functional layer away from the substrate. Light emitted from the display functional layer is diffused in more directions when passing through the scattering layer. The diffused light is then refocused upon passing through the protruding units of the encapsulation layer and emitted from the encapsulation layer. This technical solution can improve the brightness of the display panel, prevent uneven brightness, and enhance the display effect.

[0038] Optionally, Figure 2 This is a schematic diagram of the structure of another display panel provided by this utility model. Figure 3 This is a schematic diagram of the structure of another display panel provided by this utility model. Figure 4 This is a schematic diagram of the structure of a scattering unit in a display panel provided by this utility model. Based on the above embodiment, see... Figure 2 , Figure 3 and Figure 4 The scattering layer 300 includes multiple arrayed scattering units 310, which are used to scatter the light emitted by the display functional layer 200; the scattering layer 300 is also used to bond the display functional layer 200 and the encapsulation layer 400.

[0039] Specifically, the scattering layer 300 can be an OCA (Optically Clear Adhesive) layer doped with multiple scattering units 310. OCA material has good toughness and elasticity, allowing it to firmly bond the display function layer 200 to the encapsulation layer 400, while effectively preventing dust, moisture, or other contaminants from penetrating the display panel, protecting the display function layer 200, and extending the lifespan of the display panel. Multiple scattering units 310 can be doped into the scattering layer 300. These multiple scattering units 310 can be arranged in various array configurations. The scattering unit 310 can be a particle capable of reflecting light, such as a multi-faceted or spherical structure with multiple light-reflecting surfaces. The surface of the scattering unit 310 can reflect light emitted from the display function layer 200 in various directions, thereby achieving a light scattering effect. In other embodiments, the scattering layer 300 can also be a light-transmitting layer with multiple layers of different refractive indices. For example, as... Figure 3 As shown, the scattering layer 300 may include two layers: a first scattering layer 301 and a second scattering layer 302, each with a different refractive index for light. The first scattering layer 301 has a higher refractive index for light than the second scattering layer 302. When light enters the second scattering layer 302 from the high-refractive-index first scattering layer 301, the angle of refraction increases, resulting in greater light divergence. A scattering unit 310 may be disposed in the second scattering layer 302. When light passes through the scattering unit 310 in the second scattering layer 302, it is further diffused by the scattering unit 310, further enhancing the light scattering effect of the scattering layer 300. For example, as... Figure 2 As shown, the plurality of scattering units 310 can be triangular pyramids arranged in an array along a direction parallel to the substrate 100. In other embodiments, the plurality of scattering units 310 can also be arranged in a multi-layer array along the thickness direction of the display panel film layer, further improving the scattering effect of the scattering layer 300 on light. The scattering unit 310 can also be provided with a plurality of holes 311, and light passing through the holes 311 of the scattering unit 310 will be continuously reflected, thereby further improving the scattering effect of the scattering layer 300 on light. For example, as Figure 4 As shown, the scattering unit 310 can be a perforated prism structure. The scattering unit 310 can be made of materials such as silicon dioxide, titanium dioxide, or cobalt oxide. In this embodiment, the specific arrangement, structure, and materials of the scattering unit 310 in the scattering layer 300 are not limited.

[0040] Optionally, Figure 5 This is a schematic diagram of the structure of a raised unit in a display panel provided by this utility model. Based on the above embodiment, see... Figure 1 and Figure 5 The encapsulation layer 400 includes a glass cover or a rigid film; the protrusion unit 410 includes a pyramidal structure or a prism structure, and the protrusion unit 410 is used to converge the light scattered by the scattering layer 300.

[0041] Specifically, the encapsulation layer 400 can be a glass cover or a transparent rigid film. The encapsulation layer 400 serves two purposes: firstly, it protects the internal film structure of the display panel; secondly, the raised units 410 on the surface of the encapsulation layer 400 near the substrate can refocus the light scattered by the scattering layer 300. The raised units 410 can be a pyramidal structure, a prism structure, or a prism structure. For example, as... Figure 1 As shown, the raised unit 410 on the surface of the encapsulation layer 400 near the substrate 100 is a triangular pyramid structure. Multiple triangular pyramids can be arranged in an array on one surface of the encapsulation layer 400 near the substrate 100, with the pyramidal side of the pyramid positioned close to the scattering layer 300. Light scattered by the scattering layer 300 is refocused after passing through the raised unit 410 and transmitted through the encapsulation layer 400 to the surface away from the substrate 100, thereby improving the brightness of the display panel and mitigating the problem of uneven brightness in the display panel. Figure 4 As shown, the raised unit 410 can also be a prism structure. One side of the prism structure has a smooth, flat surface, and the other side has multiple raised, inclined surfaces. The smooth, flat surface of the prism structure can be positioned close to the lower surface of the encapsulation layer 400, and the side of the prism structure with raised inclined surfaces can be positioned close to the scattering layer 300. The light scattered by the scattering layer 300 can be refocused after passing through the multiple inclined surfaces of the prism structure and then transmitted through the encapsulation layer 400, which can also improve the brightness of the display panel and prevent uneven brightness of the display panel.

[0042] Optionally, Figure 6 This is a schematic diagram of another display panel provided by this utility model. Based on the above embodiments, see... Figure 6The display function layer 200 includes a pixel definition layer 210 and a driving circuit layer 220; the driving circuit layer 220 is disposed on one side of the substrate, and the pixel definition layer 210 is disposed on the side of the driving circuit layer 220 away from the substrate 100; the pixel definition layer 210 includes a plurality of sub-pixel openings 211.

[0043] Specifically, the pixel definition layer 210 may have multiple sub-pixel openings 211. Organic light-emitting materials of different colors may be deposited on the sub-pixel openings 211 to form sub-pixels of different colors. A thin-film transistor may be provided on the driving circuit layer 220, and the brightness of the sub-pixel on each sub-pixel opening 211 may be controlled by the thin-film transistor to display the image. For example, as... Figure 5 As shown, organic light-emitting materials of three colors, namely red, green and blue, can be deposited on the sub-pixel opening 211. Under the action of the driving circuit layer 220, the light emission brightness of the three sub-pixels can be controlled, thereby displaying different images.

[0044] Optionally, Figure 7 This is a schematic diagram of another display panel provided by this utility model. Based on the above embodiments, see... Figure 7 The driving circuit layer 220 includes a plurality of thin-film transistors 221 and a first electrode layer 223; the first electrode layer 223 is located between the thin-film transistors 221 and the pixel definition layer 210, and the first electrode layer 223 includes a plurality of first electrodes 2231, and the sub-pixel opening 211 exposes a portion of the first electrodes 2231; the first electrodes 2231 are connected to the thin-film transistors 221 through conductive holes 224.

[0045] Specifically, the driving circuit layer 220 may be provided with a thin-film transistor 221, an insulating layer 222, a first electrode layer 223, and a conductive hole 224. The thin-film transistor 221 may be disposed on one side of the substrate 100, and the insulating layer 222 may be disposed on the side of the thin-film transistor 221 away from the substrate 100. The first electrode layer 223 may be disposed on the side of the insulating layer 222 away from the substrate 100. The conductive hole 224 penetrates the insulating layer 222 and is used to connect the thin-film transistor 221 and the first electrode layer 223. The first electrode layer 223 may be provided with a first electrode 2231 corresponding to a plurality of sub-pixel openings 211, and the sub-pixel openings 211 may expose a portion of the first electrode 2231. The first electrode 2231 may be a metal anode that drives the sub-pixels to light up. Each thin-film transistor 221 is connected to the first electrode 2231 on the first electrode layer 223 through the conductive hole 224, so that the brightness of each sub-pixel can be controlled by controlling the thin-film transistor 221, so that the display panel can display an image. The insulating layer 222 can be disposed between the thin film transistor 221 and the first electrode layer 223. On the one hand, it is used to keep the thin film transistor 221 and the first electrode layer 223 insulated. On the other hand, it can protect the thin film transistor 221 from water and oxygen intrusion and avoid damage.

[0046] Optionally, Figure 8 This is a schematic diagram of another display panel provided by this utility model. Based on the above embodiments, see... Figure 7 and Figure 8 The thin-film transistor 221 includes: a gate layer 2211, a source layer 2212, a drain layer 2213, a channel layer 2214, and a second electrode layer 2215; the channel layer 2214 is disposed on one side of the substrate 100; the gate layer 2211, the source layer 2212, and the drain layer 2213 are disposed on the side of the channel layer 2214 away from the substrate 100, and the second electrode layer 2215 is disposed on the side of the gate layer 2211, the source layer 2212, and the drain layer 2213 away from the substrate 100; a conductive via 224 is used to connect the channel layer 2214 and the first electrode layer 210; the gate layer 2211 and the second electrode layer 2214 form a storage capacitor.

[0047] Specifically, the thin-film transistor 221 includes a gate layer 2211, a source layer 2212, a drain layer 2213, and a channel layer 2214. The channel layer 2214 can be connected to the first electrode 211 of the first electrode layer 210 through a conductive via 224. Figure 7As shown, the channel layer 2214 can be disposed on one side of the substrate, and the gate layer 2211, source layer 2212, and drain layer 2213 can be disposed on the side of the channel layer 2214 away from the substrate. The second electrode layer 2214 can be disposed on the side of the gate layer 2211 away from the substrate 100. The second electrode layer 2214 and the gate layer 2211 can form a storage capacitor for storing voltage signals. When no voltage is applied to the gate layer 2211, there is no path between the source layer 2212 and the drain layer 2213, the channel layer 2214 is in a high-resistance state, no carriers flow, the first electrode 2231 cannot receive electrical signals, and the sub-pixel does not emit light; when a voltage is applied to the gate layer 2211, a path is formed between the source layer 2212 and the drain layer 2213, the channel layer 2214 is in a low-resistance state, carriers flow, the first electrode 2231 can receive electrical signals, and the sub-pixel can emit light under the action of voltage.

[0048] Optionally, based on the above embodiments, see below. Figure 8 The driving circuit also includes multiple data signal lines 2216, which are disposed between the second electrode layer 2215 and the gate layer 2211, and are used to transmit data voltage.

[0049] Specifically, the data signal line 2216 can transmit data voltage, which can regulate the conduction state of the thin-film transistor, thereby achieving precise control of the brightness or grayscale of each sub-pixel.

[0050] Optionally, based on the above embodiments, see below. Figure 8 The display panel also includes a buffer layer 500, which is disposed on the side of the display functional layer 200 near the substrate 100, and is used to protect the display functional layer 200.

[0051] Specifically, the buffer layer 500 can be disposed between the display functional layer 200 and the substrate 100. The buffer layer 500 can isolate water and oxygen intrusion, prevent the metal electrodes in the display functional layer 200 from being oxidized and causing failure, and improve the lifespan of the display panel.

[0052] According to a second aspect of the present invention, a display device is also provided, which includes the same beneficial effects as the display panel described in any embodiment of the present invention, and will not be repeated here.

[0053] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0054] The specific embodiments described above do not constitute a limitation on the scope of protection of this 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 principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A display panel, characterized in that, include: Base; A display functional layer is disposed on one side of the substrate, and the display functional layer emits light to the side away from the substrate; A scattering layer is disposed on the side of the display functional layer away from the substrate, and the scattering layer is used to scatter the light emitted by the display functional layer; An encapsulation layer is disposed on the side of the scattering layer away from the substrate. The side of the encapsulation layer close to the substrate includes a plurality of arrayed protrusion units, which are used to converge the light scattered by the scattering layer.

2. The display panel according to claim 1, characterized in that, The scattering layer includes multiple scattering units arranged in an array, which are used to scatter the light emitted by the display functional layer; the scattering layer is also used to bond the display functional layer and the encapsulation layer.

3. The display panel according to claim 2, characterized in that, The encapsulation layer includes a glass cover or a rigid film.

4. The display panel according to claim 2, characterized in that, The protruding unit includes a pyramidal structure or a prism structure, and the protruding unit is used to converge the light scattered by the scattering layer.

5. The display panel according to claim 2, characterized in that, The scattering unit is polygonal or spherical; the scattering unit includes multiple holes.

6. The display panel according to claim 2, characterized in that, The display function layer includes a pixel definition layer and a driving circuit layer; The driving circuit layer is disposed on one side of the substrate, and the pixel definition layer is disposed on the side of the driving circuit layer away from the substrate; The pixel definition layer includes sub-pixel openings.

7. The display panel according to claim 6, characterized in that, The driving circuit layer includes multiple thin-film transistors and a first electrode layer; The first electrode layer is located between the thin-film transistor and the pixel definition layer, and the first electrode layer includes a plurality of first electrodes, with the sub-pixel opening exposing a portion of the first electrodes; The first electrode is connected to the thin-film transistor through a conductive hole.

8. The display panel according to claim 7, characterized in that, The driving circuit layer also includes: multiple data signal lines. The multiple data signal lines are disposed in the driving circuit layer, and the data signal lines are used to transmit data voltage.

9. The display panel according to claim 5, characterized in that, Also includes: Buffer layer, The buffer layer is disposed on the side of the display functional layer near the substrate, and the buffer layer is used to protect the display functional layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

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