Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises an array substrate, a plurality of light emitting devices arranged on the array substrate, a pixel definition layer spacing the plurality of light emitting devices, and a sound emitting functional layer arranged on a side of the light emitting device away from the array substrate. The sound emitting functional layer comprises a first conductive layer, a filter layer and a second conductive layer arranged on the side of the light emitting device away from the array substrate. The filter layer comprises a plurality of filters corresponding to the plurality of light emitting devices and a light shielding layer spacing the plurality of filters. The application integrates the sound emitting functional component and the optical component, and realizes the optical performance and the directional sound emitting function of the display panel, so that the display panel has the advantages of simple structure, small size (such as thickness), simplified process and reduced cost.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display panel and a display device. Background Technology

[0002] Display panels with sound capabilities have more diverse structures, such as enabling high screen-to-body ratios (e.g., full-screen displays). However, current display panels with sound capabilities generally suffer from problems such as large size, which urgently need to be addressed. Summary of the Invention

[0003] The present invention provides a display panel and a display device. The display panel has the function of directional sound emission and has advantages such as small size, which can effectively solve the defects of the prior art.

[0004] In one aspect, the present invention provides a display panel, comprising: an array substrate; a plurality of light-emitting devices disposed on the array substrate; a pixel definition layer spaced apart from the plurality of light-emitting devices; and a sound-emitting functional layer stacked on the side of the light-emitting devices facing away from the array substrate, the sound-emitting functional layer comprising a first conductive layer, a filter layer and a second conductive layer stacked on the side of the light-emitting devices facing away from the array substrate, the filter layer comprising a plurality of filters corresponding one-to-one with the plurality of light-emitting devices and a light-shielding layer spaced apart from the plurality of filters.

[0005] In some embodiments, the light-shielding layer includes a first light-shielding layer and a second light-shielding layer, with the side of the first conductive layer facing the second conductive layer as a reference, the height of the first light-shielding layer is higher than the height of the second light-shielding layer.

[0006] In some embodiments, the difference between the height of the first light-shielding layer and the height of the second light-shielding layer is 5 μm to 10 μm; and / or, the height of the first light-shielding layer is 4 μm to 20 μm; and / or, the height of the second light-shielding layer is 2 μm to 5 μm.

[0007] In some embodiments, the first light-shielding layer includes a plurality of first light-shielding structures, and the second light-shielding layer includes a plurality of second light-shielding structures. The first light-shielding structures and the second light-shielding structures are configured such that each pair of adjacent filters in the light-filtering layer is spaced apart. The spacing between each pair of adjacent first light-shielding structures is greater than the spacing between each pair of adjacent second light-shielding structures. Preferably, the spacing between each pair of adjacent first light-shielding structures is 5 to 50 times the spacing between each pair of adjacent second light-shielding structures. Preferably, the spacing between each pair of adjacent first light-shielding structures is 0.5 mm to 1.5 mm.

[0008] In some embodiments, the filter layer includes a plurality of filter regions, each filter region including a plurality of filters, the second light-shielding layer being used to space apart each two adjacent filters in each filter region; the first light-shielding layer being used to space apart each two adjacent filter regions.

[0009] In some embodiments, the plurality of light-emitting devices include a first light-emitting device, a second light-emitting device, and a third light-emitting device distributed along a second direction, wherein each of the first light-emitting device, the second light-emitting device, and the third light-emitting device emits a different color; the plurality of filters include a first filter corresponding to the first light-emitting device, a second filter corresponding to the second light-emitting device, and a third filter corresponding to the third light-emitting device; each filtering region is composed of one or more filtering unit groups, and each filtering unit group is composed of a first filter, a second filter, a third filter distributed along the second direction, and a second light-shielding layer spaced between the first filter and the second filter and spaced between the second filter and the third filter.

[0010] In some embodiments, there is a gap between the filter layer and the second conductive layer; and / or, with the side of the first conductive layer facing the second conductive layer as a reference, the height of the light-shielding layer is higher than the height of the filter; and / or, the distance between the filter and the second conductive layer is 5μm to 10μm.

[0011] In some embodiments, the sheet resistance of the first conductive layer is less than 40 ohms / □; and / or, the sheet resistance of the second conductive layer is not higher than 40 ohms / □.

[0012] In some embodiments, the display panel further includes an encapsulation layer disposed between the plurality of light-emitting devices and the first conductive layer; and / or, the display panel further includes a protective layer located on the side of the second conductive layer opposite to the array substrate; preferably, the sum of the thickness of the protective layer and the thickness of the second conductive layer is 10μm-100μm; preferably, the protective layer includes one or more of glass, polyimide, and polyethylene terephthalate; preferably, the display panel further includes an adhesive layer, the protective layer, the adhesive layer, and the array substrate are sequentially connected and enclosed to form an accommodating space, and the plurality of light-emitting devices, the first conductive layer, the filter layer, and the second conductive layer are located within the accommodating space.

[0013] In another aspect, the present invention provides a display device including the above-described display panel.

[0014] In this invention, the first conductive layer, the filter layer, and the second conductive layer of the sound-emitting functional layer serve as sound-emitting components to achieve directional sound emission from the display panel, while simultaneously acting as optical components to ensure the light emission effect of the display panel. This invention integrates the sound-emitting functional components with the optical components of the display panel, achieving both the optical performance and directional sound emission function of the display panel. It eliminates the need for additional sound-emitting units or other structures attached to the display panel, offering advantages such as simple structure, small size (e.g., thickness), simplified display panel manufacturing processes, and reduced costs, making it significant for practical industrial applications. Furthermore, the display panel of this invention features directional sound emission and offers greater structural diversity; for example, it can avoid the need for earpieces and other structures, achieving a high screen-to-body ratio (e.g., for use in full-screen displays). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the planar structure of a display panel according to another embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the planar structure of a display panel according to an embodiment of the present invention;

[0017] Figure 3 This is an embodiment of the present invention. Figure 1 A schematic diagram of the cross-sectional structure of the display panel along line I-II;

[0018] Figure 4 Another embodiment of the present invention Figure 1 A schematic diagram of the cross-sectional structure of the display panel along line I-II.

[0019] Explanation of reference numerals in the attached figures: 1: Array substrate; 211: First light-emitting device; 212: Second light-emitting device; 213: Third light-emitting device; 22: Pixel definition layer; 3: Encapsulation layer; 4: First conductive layer; 5: Filter layer; 50: Filter area; 500: Filter unit group; 511: First filter; 512: Second filter; 513: Third filter; 521: First light-shielding layer; 5211: First light-shielding structure; 522: Second light-shielding layer; 5221: Second light-shielding structure. 6: Light structure; 7: Second conductive layer; 8: Protective layer; 9: Sound-emitting functional layer; 10: Adhesive layer; 11: Gap; H1: Height of the first light-shielding layer; H1': Distance between the first light-shielding layer and the second conductive layer; H2: Height of the second light-shielding layer; H2': Distance between the second light-shielding layer and the second conductive layer; H3: Height of the filter; H3': Distance between the filter and the second conductive layer; w1: Spacing between two adjacent first light-shielding structures; w2: Spacing between two adjacent second light-shielding structures. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below. The specific embodiments listed below are merely descriptions of the principles and features of the present invention, and the examples are only for explaining the present invention and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Traditional mobile phones and other electronic products mainly use speakers to produce sound. This requires openings in the screen (display panel) of the electronic product to form an earpiece in order to ensure sound quality. This requires that the area in the screen where the earpiece is set has sufficient width, which limits its application.

[0022] Display panels with sound capabilities eliminate the need for an earpiece and offer greater structural diversity, enabling features such as high screen-to-body ratios (e.g., full-screen displays). These panels typically emit sound in a directional manner, ensuring privacy by directing the sound without the need for headphones or an earpiece. However, current sound-enabled display panels generally suffer from issues such as excessive thickness, which urgently require solutions.

[0023] For example, to enable sound generation from a display panel, an exciter is typically placed on the back of the display panel. The exciter drives the screen in front, which acts as a vibrator, causing the surrounding air to vibrate and thus generate sound. However, the exciter increases the thickness of the display panel, hindering its development towards thinner and lighter designs. Furthermore, the screen vibration caused by the exciter vibrates the display panel and even the entire structure of the electronic product, resulting in unsatisfactory directional sound generation, poor sound quality, and limited applications.

[0024] Directional sound generation technology is generally divided into piezoelectric and electrostatic types. Electrostatic technology achieves vibration and sound generation through the adsorption and desorption process between positive and negative electrodes. Specifically, the sound generation unit can be physically combined with the display panel in the direction of light emission. For example, the sound generation unit can be attached to the light-emitting side of the display panel using an adhesive bonding method. However, although this can achieve the directional sound generation function of the display panel to a certain extent, the sound generation unit has a certain thickness (usually greater than or equal to 1mm). After attaching it to the display panel, it will increase the thickness of the overall panel structure, which is not conducive to the thinning and lightening of the display panel and the electronic products using the display panel.

[0025] In view of this, embodiments of the present invention provide a display panel, such as... Figures 1 to 4As shown, the display panel includes an array substrate 1; multiple light-emitting devices disposed on the array substrate 1; a pixel definition layer 22 (or pixel spacing layer) that separates the multiple light-emitting devices; and a sound-emitting functional layer 8 stacked on the side of the light-emitting devices facing away from the array substrate. The sound-emitting functional layer 8 includes a first conductive layer 4, a light filter layer 5, and a second conductive layer 6 stacked on the side of the light-emitting devices facing away from the array substrate. The light filter layer 5 includes multiple light filters corresponding to the multiple light-emitting devices and a light-shielding layer that separates the multiple light filters.

[0026] In the aforementioned display panel, the first conductive layer 4, the filter layer 5, and the second conductive layer 6 of the sound-emitting functional layer 8 serve as sound-emitting components, enabling directional sound emission from the display panel. Simultaneously, they function as optical components to ensure the light emission effect of the display panel. Therefore, compared to attaching sound-emitting units or other structures to the display panel, this embodiment of the invention integrates the sound-emitting functional components and optical components into one unit. This allows the display panel to possess both optical performance and directional sound emission capabilities, while also offering advantages such as simple structure, small thickness, simplified display panel manufacturing processes, and reduced costs.

[0027] Specifically, the first conductive layer 4 and the second conductive layer 6 serve as the positive and negative electrodes of the sound-generating component, respectively, to provide working voltage. In the working state, they generate electrostatic induction and, through the alternating process of electrostatic adsorption and desorption (rebound), cause the display panel to vibrate and generate sound, thus achieving directional sound generation from the display panel. The filter layer 5 (including a filter and a light-shielding layer) serves as an insulator, insulating the first conductive layer 4 and the second conductive layer 6. It also provides support, preventing problems such as the first conductive layer 4 and the second conductive layer 6 failing to rebound or rebounding slowly after mutual adsorption during operation. This ensures that the two layers alternately undergo mutual adsorption and desorption, thereby achieving vibration and sound generation.

[0028] Meanwhile, the filters in the filter layer 5 can filter light to filter out non-target light (such as filtering out reflected light from the ambient light entering the display panel, thus reducing reflection), improve the color purity of the light (self-emission) generated by the corresponding light-emitting device, and thus improve the color purity of the emitted light from the display panel. The light-shielding layer, as an isolation layer for the isolation filters, is spaced between different filters to prevent color mixing between the light generated by different light-emitting devices and ensure the optical performance of the display panel.

[0029] Specifically, such as Figure 1 and Figure 4 As shown, the sound-emitting functional layer 8 also includes a protective layer 7 located on the side of the second conductive layer 6 away from the array substrate 1. In the working state, the protective layer 7 can be driven to vibrate through the alternating electrostatic adsorption and desorption (rebound) process of the first conductive layer 4 and the second conductive layer 6, thereby realizing directional sound emission of the display panel.

[0030] Specifically, the light-emitting device is used to emit light, and it can be a conventional organic light-emitting diode (OLED) device in the art, such as an OLED top-emitting device, without any particular limitation.

[0031] Continue to refer to Figures 1 to 4 The aforementioned plurality of light-emitting devices may include a first light-emitting device 211, a second light-emitting device 212, and a third light-emitting device 213. The light emitted by the first light-emitting device 211, the second light-emitting device 212, and the third light-emitting device 213 has different wavelengths (i.e., different colors of light). For example, the first light-emitting device 211 is a red light-emitting device (R), the second light-emitting device 212 is a green light-emitting device (G), and the third light-emitting device is a blue light-emitting device (B). The number of the first light-emitting device 211, the second light-emitting device 212, and the third light-emitting device 213 may be one or more.

[0032] The aforementioned display panel may include one or more pixel unit groups, each pixel unit group consisting of a first light-emitting device 211, a second light-emitting device 212, a third light-emitting device 213 distributed along a second direction, and a pixel definition layer 22 spaced between the first light-emitting device 211 and the second light-emitting device 212 and spaced between the second light-emitting device 212 and the third light-emitting device 213.

[0033] When there are multiple pixel unit groups, each pair of adjacent pixel unit groups is separated by the pixel definition layer 22, thereby separating each pair of adjacent light-emitting devices by the pixel definition layer 22. These pixel unit groups can be distributed along the second direction, or along the third direction, or partially distributed along the second direction and partially distributed along the third direction.

[0034] The aforementioned multiple light-emitting devices can be arranged in an array. Specifically, there are one or more pixel unit groups distributed along the second direction, and multiple pixel unit groups distributed along the third direction to form rows and columns. The light-emitting devices in the same column are the same. For example, the light-emitting devices in three adjacent columns are configured as follows: the light-emitting device in the first column is the first light-emitting device 211, the light-emitting device in the second column is the second light-emitting device 212, and the light-emitting device in the third column is the third light-emitting device 213, thereby forming an RGB pixel array.

[0035] The pixel definition layer 22 is used to separate each two adjacent light-emitting devices. Generally, each light-emitting device is surrounded by the pixel definition layer 22, which is equivalent to the pixel definition layer 22 having a first groove (pixel definition area) corresponding to each light-emitting device. Each light-emitting device is located in a first groove, so that each two adjacent light-emitting devices are separated by the pixel definition layer 22.

[0036] Specifically, the pixel definition layer 22 may be opaque, for example, black, and may be formed of conventional black opaque pixel definition layer materials or black matrix materials in the art, but is not limited thereto.

[0037] The filters in the filter layer 5 correspond one-to-one with the light-emitting devices, that is, the number of filters is the same as the number of light-emitting devices. One filter corresponds to one light-emitting device, and the color purity of the light emitted by the corresponding light-emitting device can be improved by the filter. The projection of any filter on the array substrate 1 covers the projection of its corresponding light-emitting device on the array substrate 1, and the two projections can, for example, substantially overlap.

[0038] like Figures 1 to 4 As shown, the filter includes a first filter 511 corresponding to the first light-emitting device 211, a second filter 512 corresponding to the second light-emitting device 212, and a third filter 513 corresponding to the third light-emitting device 213.

[0039] The number of first filters 511, second filters 512, and third filters 513 can be one or more. Each first filter 511 corresponds to one first light-emitting device 211, and the number of each is the same; one first filter 511 corresponds to one first light-emitting device 211. Each second filter 512 corresponds to one second pixel layer, and the number of each is the same; one second filter 512 corresponds to one second light-emitting device 212. Each third filter 513 corresponds to one third pixel layer, and the number of each is the same; one third filter 513 corresponds to one third light-emitting device 213.

[0040] Specifically, the filter layer 5 may include one or more filter unit groups 500, each filter unit group 500 consisting of a first filter 511, a second filter 512, a third filter 513 distributed along a second direction, and a light-shielding layer (e.g., ...) spaced between each two of the first filter 511, the second filter 512, and the third filter 513. Figures 1 to 4 The light-shielding layer shown is composed of the spaced space between the first filter 511 and the second filter 512 and the spaced spaced space between the second filter 512 and the third filter 513.

[0041] Each filter unit group 500 corresponds one-to-one with the aforementioned pixel unit group, and the number of both is the same. One filter unit group 500 corresponds to one pixel unit group, and the filter in the filter unit group 500 corresponds one-to-one with the light-emitting device in its corresponding pixel unit group, so that the filter in the filter layer 5 corresponds one-to-one with the aforementioned multiple light-emitting devices.

[0042] Specifically, when there are multiple filter unit groups 500, each pair of adjacent filter unit groups 500 is separated by a light-shielding layer, so that each pair of adjacent filters in the filter layer 5 is separated by a light-shielding layer. These filter unit groups 500 can be distributed along the second direction, or along the third direction, or partially distributed along the second direction and partially distributed along the third direction.

[0043] like Figure 1 and Figure 2 As shown, the filters in the filter layer 5 can be arranged in an array. Specifically, there are one or more filter unit groups 500 distributed along the second direction, and multiple filter unit groups 500 distributed along the third direction to form rows and columns. The filters in the same column are the same. For example, the filters in three adjacent columns are configured as follows: the filter in the first column is the first filter 511, the filter in the second column is the second filter 512, and the filter in the third column is the third filter 513, thereby forming a filter array corresponding to the RGB pixel array.

[0044] The aforementioned filter can be a conventional color filter (CF) in the art, and there are no particular limitations on it.

[0045] Furthermore, the light-shielding layer in filter layer 5 corresponds to the pixel definition layer 22. The light-shielding layer is used to separate each pair of adjacent filters. Generally, each filter is surrounded by a light-shielding layer, which is equivalent to the light-shielding layer having a second groove (filter defining area) corresponding to each filter. Each filter is located in a second groove, thereby separating each pair of adjacent filters by the light-shielding layer, forming filter layer 5. The light-shielding layer is generally black and can be formed from a conventional black opaque black matrix material in the art.

[0046] As described above, the display panel achieves directional sound emission through the components of the sound-emitting functional layer 8. Specifically, the sound-emitting functional layer 8 can be configured to cause the protective layer 7 to vibrate based on the electrostatic induction of the first conductive layer 4 and the second conductive layer 6 in the working state, thereby achieving directional sound emission from the display panel.

[0047] Specifically, a gap 10 exists between the filter layer 5 and the second conductive layer 6. This gap 10 is formed by a region between the filter layer 5 and the second conductive layer 6 where no film or material is filled. The gap 10 can contain air or other non-corrosive gases (i.e., the presence of gas in the gap 10 will not corrode the film structure of the display panel), or it can be a vacuum; there are no particular limitations. The film layer (including the first conductive layer 4 and the protective layer 7, etc.) located on the side of the gap 10 facing away from the filter layer 5 serves as a vibration layer. The presence of the gap 10 provides vibration space for the vibration layer, making it easier for the vibration layer to vibrate and achieving the directional sound emission function of the display panel.

[0048] Specifically, the aforementioned gap 10 may exist between at least one of the light filter and the light-shielding layer of the light-filtering layer 5 and the second conductive layer 6. For example, as shown... Figure 3 and Figure 4 As shown, the distance between the filter and the second conductive layer 6 is greater than 0, and there is a gap 10 between them; there is a gap 10 between the light-shielding layer and the second conductive layer 6, that is, there is such a gap 10 between part or all of the light-shielding layer and the second conductive layer 6 (e.g., if the distance between the light-shielding layer and the second conductive layer 6 is greater than 0, there is such a gap 10 between all of the light-shielding layers and the second conductive layer 6). Figure 3 As shown, the distance between the first light-shielding layer 521 and the second conductive layer 6, and the distance between the second light-shielding layer 522 and the second conductive layer 6 are both greater than 0. The aforementioned gaps 10 exist between the first light-shielding layer 521 and the second conductive layer 6, and between the second light-shielding layer 522 and the second conductive layer 6, or, as... Figure 4 As shown, the distance between the second light-shielding layer 522 and the second conductive layer 6 is greater than 0, and there is a gap 10 between them. The first light-shielding layer 521 is in direct contact with the second conductive layer 6, that is, the distance between them is 0, and there is no gap 10.

[0049] Generally, taking the side of the first conductive layer 4 facing the second conductive layer 6 as a reference, the height of the light-shielding layer is higher than the height H3 of the filter. That is, the distance from the light-shielding layer to the second conductive layer 6 is less than the distance H3' from the filter to the second conductive layer 6. This helps to prevent color mixing through the light-shielding layer and maintain the good optical performance of the display panel. At the same time, the light-shielding layer, as an isolation pillar for the sound-emitting functional components, plays a better supporting role, preventing the first conductive layer 4 and the second conductive layer 6 from failing to rebound effectively after electrostatic adsorption, avoiding adsorption failure, and improving the directional sound emission effect of the display panel.

[0050] In some embodiments, the distance between the filter and the second conductive layer 6 can be 5μm to 10μm, such as 5μm, 6μm, 7μm, 8μm, 9μm, 10μm or any combination thereof. This is more conducive to supporting the vibration of the vibrating layer and preventing problems such as the distance between the first conductive layer 4 and the second conductive layer 6 being too small to rebound or to rebound slowly.

[0051] According to further research by the inventors, the aforementioned light-shielding layer may include a first light-shielding layer 521 and a second light-shielding layer 522. Taking the side of the first conductive layer 4 facing the second conductive layer 6 as a reference, the height H1 of the first light-shielding layer 521 is higher than the height H2 of the second light-shielding layer 522. That is, the distance H1' from the first light-shielding layer 521 to the second conductive layer 6 is less than the distance H2' from the second light-shielding layer 522 to the second conductive layer 6. This can further improve the optical performance and directional sound emission effect of the display panel.

[0052] Specifically, the first light-shielding layer 521 and the second light-shielding layer 522 serve as isolation layers for the filters, separating them to prevent color mixing and meet the optical performance requirements of the display panel. Simultaneously, the first light-shielding layer 521 and the second light-shielding layer 522 act as isolation pillars for the sound-generating components, forming a dot matrix structure to support the vibration and sound generation of the sound-generating layer 8, preventing adsorption failure. The higher height of the first light-shielding layer 521 provides better support, while the lower height of the second light-shielding layer 522 retains more vibration space, further preventing adsorption failure of the first conductive layer 4 and the second conductive layer 6, while also ensuring good light emission performance of the display panel.

[0053] Specifically, the difference between the height H1 of the first light-shielding layer 521 and the height H2 of the second light-shielding layer 522 can be 5μm to 10μm (i.e., 5μm≤H1-H2≤10μm), such as 5μm, 6μm, 7μm, 8μm, 9μm, 10μm or any combination thereof, which is beneficial to further improve the optical and acoustic performance of the display panel.

[0054] In some embodiments, the height H1 of the first light-shielding layer 521 can be 4μm to 20μm, for example, a range of 4μm, 7μm, 10μm, 13μm, 15μm, 18μm, 20μm or any two of these.

[0055] In some embodiments, the height H2 of the second light-shielding layer 522 can be 2μm to 5μm, for example, a range of 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm or any two of these.

[0056] In addition, such as Figure 3 and Figure 4 As shown, the height H2 of the second light-shielding layer 522 is higher than the height H3 of the filter, that is, the distance H2' from the second light-shielding layer 522 to the second conductive layer 6 is less than the distance H3' from the filter to the second conductive layer 6. Gaps 10 exist between the filter and the second conductive layer 6, and between the second light-shielding layer 522 and the second conductive layer 6. Gaps 10 can also exist between the first light-shielding layer 521 and the second conductive layer 6 (e.g., ...). Figure 3 (as shown), or, as Figure 4 As shown, there is no gap 10 between the first light-shielding layer 521 and the second conductive layer 6 (for example, the two are in direct contact, that is, the distance H1' between the two is 0 (i.e., H1' = 0)).

[0057] Specifically, the thickness of the first light-shielding layer 521 is greater than the thickness of the second light-shielding layer 522, and the thickness of the second light-shielding layer 522 is greater than the thickness of the filter. The first light-shielding layer 521, the second light-shielding layer 522, and the filter are respectively disposed on the first conductive layer 4. The thickness of the first light-shielding layer 521 is the height H1 of the first light-shielding layer 521, the thickness of the second light-shielding layer 522 is the height H2 of the second light-shielding layer 522, and the thickness of the filter is the height H3 of the filter.

[0058] like Figures 1 to 4 As shown, the first light-shielding layer 521 and the second light-shielding layer 522 are configured such that each pair of adjacent filters in the filter layer 5 are spaced apart. The first light-shielding layer 521 and the second light-shielding layer 522 are spaced apart by different pairs of filters, that is, there is either the first light-shielding layer 521 or the second light-shielding layer 522 between any two adjacent filters (i.e., the first light-shielding layer 521 and the second light-shielding layer 522 do not exist at the same time).

[0059] Specifically, such as Figures 1 to 4 As shown, the first light-shielding layer 521 includes a plurality of first light-shielding structures 5211, and the second light-shielding layer 522 includes a plurality of second light-shielding structures 5221. The first light-shielding structures 5211 and the second light-shielding structures 5221 are configured such that each pair of adjacent filters in the filter layer 5 are spaced apart.

[0060] Specifically, at least one filter exists between each pair of adjacent first light-shielding structures 5211 and between each pair of adjacent second light-shielding structures 5221. The first light-shielding structures 5211 and the second light-shielding structures 5221 are separated by two different filters. That is, there is either a first light-shielding structure 5211 or a second light-shielding structure 5221 between any two adjacent filters (i.e., the first light-shielding structure 5211 and the second light-shielding structure 5221 do not exist at the same time), thereby separating each pair of adjacent filters in the filter layer 5.

[0061] In this way, the distance w1 between each pair of adjacent first light-shielding structures 5211 is greater than the distance w2 between each pair of adjacent second light-shielding structures 5221 (w1>w2). This allows for more vibration space to be retained between the filter layer 5 and the second conductive layer 6 while improving the optical performance of the display panel, thereby further improving the directional sound emission effect of the display panel.

[0062] To further improve the light emission performance and directional sound emission effect of the display panel, in some preferred embodiments, the distance w1 between two adjacent first light-shielding structures 5211 can be 5 to 20 times the distance w2 between two adjacent second light-shielding structures 5221 (i.e., 5 ≤ w1 / w2 ≤ 20), and w1 / w2 is, for example, a range of 5, 8, 10, 12, 15, 18, 20 or any two of them.

[0063] Specifically, the spacing w1 between any two adjacent first light-shielding structures 5211 can be 0.5mm to 1.5mm, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm or any combination thereof.

[0064] The aforementioned plurality of first light-shielding structures 5211 may be distributed along the second direction, or along the third direction, or partially distributed along the second direction and partially distributed along the third direction (e.g. Figures 1 to 4 As shown, the extension direction (length direction) of the first light-shielding structure 5211 distributed along the second direction is substantially parallel to the third direction, and the extension direction of the first light-shielding structure 5211 distributed along the third direction is substantially parallel to the second direction. It can be understood that two adjacent first light-shielding structures 5211 refer to two adjacent first light-shielding structures 5211 distributed along the same direction, for example, the two adjacent first light-shielding structures 5211 are distributed along the second direction or the two adjacent first light-shielding structures 5211 are distributed along the third direction. When two adjacent first light-shielding structures 5211 are distributed along the second direction, the distance w1 between the two adjacent first light-shielding structures 5211 refers to the distance between the two adjacent first light-shielding structures 5211 in the second direction; when two adjacent first light-shielding structures 5211 are distributed along the third direction, the distance w1 between the two adjacent first light-shielding structures 5211 refers to the distance between the two adjacent first light-shielding structures 5211 in the third direction.

[0065] The aforementioned plurality of second light-shielding structures 5221 can be distributed along the second direction, or along a third direction, or partially along the second direction and partially along the third direction. The extension direction of the second light-shielding structures 5221 distributed along the second direction is substantially parallel to the third direction, and the extension direction of the second light-shielding structures 5221 distributed along the third direction is substantially parallel to the second direction. It can be understood that two adjacent second light-shielding structures 5221 refer to two adjacent second light-shielding structures 5221 distributed along the same direction, for example, the two adjacent second light-shielding structures 5221 are distributed along the second direction or the two adjacent second light-shielding structures 5221 are distributed along a third direction. When two adjacent second light-shielding structures 5221 are distributed along the second direction, the distance w2 between the two adjacent second light-shielding structures 5221 is the distance between the two adjacent second light-shielding structures 5221 in the second direction; when two adjacent second light-shielding structures 5221 are distributed along a third direction, the distance w2 between the two adjacent second light-shielding structures 5221 is the distance between the two adjacent second light-shielding structures 5221 in the third direction.

[0066] Furthermore, the side of the first light-shielding layer 521 facing the second conductive layer 6 is essentially flat, and the sides of the plurality of first light-shielding structures 5211 facing the second conductive layer 6 are essentially flush, meaning the distances between these first light-shielding structures 5211 and the second conductive layer 6 are essentially equal, and their heights (or thicknesses) are essentially equal. Similarly, the side of the second light-shielding layer 522 facing the second conductive layer 6 is essentially flat, and the sides of the plurality of second light-shielding structures 5221 facing the second conductive layer 6 are essentially flush, meaning the distances between these second light-shielding structures 5221 and the second conductive layer 6 are essentially equal, and their heights (or thicknesses) are essentially equal. This ensures good uniformity between the first light-shielding layer 521 and the second light-shielding layer 522, resulting in excellent optical and acoustic performance of the display panel.

[0067] Specifically, the filter layer 5 includes one or more filter areas 50, and each filter area 50 includes multiple filters.

[0068] The second light-shielding layer 522 exists within the filter area 50 and is used to separate each pair of adjacent filters in each filter area 50 (i.e., a second light-shielding layer 522 exists between each pair of adjacent filters in the filter area 50). Specifically, as... Figure 1 and Figure 2 As shown, in each filter region 50, in the second direction, there is a second light-shielding structure 5221 between adjacent filters, and a filter between two adjacent second light-shielding structures 5221. The distance w2 between two adjacent second light-shielding structures 5221 is equal to the width of the filter in the second direction. In the third direction, there is a second light-shielding structure 5221 between adjacent filters, and a filter between two adjacent second light-shielding structures 5221. The distance w2 between two adjacent second light-shielding structures 5221 is equal to the width of the filter in the third direction.

[0069] like Figure 1 and Figure 2 As shown, the multiple second light-shielding structures 5221 in each filter area 50 can be connected as one unit, that is, the second light-shielding layer 522 in each filter area 50 is integrally formed, and the filter area 50 is divided into filter-defined areas corresponding to the filters through the multiple second light-shielding structures 5221, and each filter is located in a filter-defined area.

[0070] In addition, a first light-shielding layer 521 exists outside the filter area 50. The first light-shielding layer 521 exists on at least one side of each filter area 50. For example, the first light-shielding layer 521 exists on both sides of each filter area 50 in the second direction and / or on both sides of each filter area in the third direction. Typically, the first light-shielding layer 521 is provided around the periphery of each filter area 50 (i.e., the first light-shielding layer 521 is provided around the periphery of each filter area 50).

[0071] When there are multiple filter areas 50, the first light-shielding layer 521 is used to separate each pair of adjacent filter areas 50 (a second light-shielding layer 522 exists between each pair of adjacent filter areas 50). Specifically, as... Figure 1 and Figure 2 As shown, in the second direction, there is a first light-shielding structure 5211 between adjacent filter areas 50, and each filter area 50 has a first light-shielding structure 5211 on both sides of the opposite side in the second direction. There is a filter area 50 between two adjacent first light-shielding structures 5211, and the distance w1 between two adjacent first light-shielding structures 5211 is equal to the width of the filter area 50 in the second direction. In the third direction, there is a first light-shielding structure 5211 between adjacent filter areas 50, and each filter area 50 has a first light-shielding structure 5211 on both sides of the opposite side in the third direction. There is a filter area 50 between two adjacent first light-shielding structures 5211, and the distance w1 between two adjacent first light-shielding structures 5211 is equal to the width of the filter area 50 in the third direction.

[0072] like Figure 1 and Figure 2 As shown, the above-mentioned multiple first light-shielding structures 5211 can be connected together to form a first light-shielding layer 521, that is, the first light-shielding layer 521 is integrally formed, and the filter layer 5 is divided into filter area definition areas corresponding to the filter areas 50 through multiple first light-shielding structures 5211, and each filter area 50 is located within a filter area definition area.

[0073] Furthermore, the cross-section of the first light-shielding structure 5211 parallel to the third direction can be a semi-circle, a rectangle, a trapezoid, or other regular or irregular shape, and the cross-section of the second light-shielding structure 5221 parallel to the third direction can be a semi-circle, a rectangle, a trapezoid, or other regular or irregular shape, without any particular restrictions.

[0074] like Figure 1 and Figure 2 As shown, each filter area 50 can be composed of one or more filter unit groups 500. In this way, the first light-shielding structure 5211 is spaced between one or more complete RGB unit corresponding filter unit groups 500, which helps to further improve the light emission and directional sound emission effects of the display panel.

[0075] When there are multiple filter unit groups 500 in a filter area 50, these filter unit groups 500 in the filter area 50 can be distributed along the second direction, or along the third direction, or partially distributed along the second direction and partially distributed along the third direction. Specifically, they can be arranged in an array, so that the filters in the filter area 50 are arranged in an array.

[0076] In addition, such as Figure 1 and Figure 2 As shown, when there are multiple filter areas 50, the width of each pair of filter areas 50 in the second direction is basically the same (that is, the width of any filter area 50 in the second direction is basically the same as that of any other filter area 50 in the second direction), and the width in the third direction is also basically the same. The number of filter unit groups 500 in each pair of filter areas 50 is the same, and the width of each pair of filters in the second direction is basically the same, and the width in the third direction is also basically the same. This can make the filter layer 5 have better uniformity, which is beneficial to the light emission and directional sound emission effect of the display panel.

[0077] like Figures 1 to 4 As shown, the first direction, the second direction, and the third direction intersect each other. Specifically, the first direction may be perpendicular to the second direction, the second direction may be perpendicular to the third direction, and the third direction may be perpendicular to the first direction. Among them, the first direction, the direction along the array substrate 1 to the sound-emitting functional layer 8, the thickness direction of the display panel, the height direction (also the thickness direction) of the light-shielding layer, and the height direction (also the thickness direction) of the filter are parallel to each other.

[0078] In addition, the above-mentioned display panel also includes an encapsulation layer 3 disposed between the light-emitting device and the first conductive layer 4. The projection of the encapsulation layer 3 on the array substrate 1 covers the projection of the plurality of light-emitting devices and the pixel definition layer 22 on the array substrate 1. The first conductive layer 4 is disposed on the encapsulation layer 3.

[0079] The aforementioned encapsulation layer 3 may specifically include a thin-film encapsulation layer. In specific implementation, the light-emitting device may be encapsulated with a thin-film encapsulation (TFE) to form a thin-film encapsulation layer. The encapsulation layer 3 is generally a multi-layer structure, which may specifically include a first inorganic layer, an organic layer and a second inorganic layer stacked sequentially along the first direction. These organic and inorganic layers may be formed using conventional materials for these layers in the art, and there are no particular limitations on this.

[0080] In addition, the array substrate 1 may specifically include a thin film transistor array substrate 1 (TFT) having a planarization layer, which is the outermost film layer of the array substrate 1, and the light-emitting device is disposed on the planarization layer.

[0081] In addition, the aforementioned protective layer 7 is transparent, and it can be a cover plate of the display panel, such as a glass cover (CG), used to protect the film layer inside the display panel.

[0082] Specifically, the protective layer 7 may include one or more of glass, polyimide (PI), and polyethylene terephthalate (PET). In specific implementations, one or more of ultra-thin glass (UTG), colorless polyimide (CPI), and PET may be used to form the protective layer 7.

[0083] In some embodiments, the sum of the thickness of the protective layer 7 and the thickness of the second conductive layer 6 is 10μm-100μm, for example, a range of 10μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm or any two of these. In this way, the protective layer 7 and the second conductive layer 6 have suitable thicknesses, which are beneficial to the vibration of the vibration layer and further optimize the directional sound emission function of the display panel.

[0084] Specifically, the sheet resistance of the second conductive layer 6 can be no higher than 40 ohms / □, and the sheet resistance of the first conductive layer 4 can be less than 40 ohms / □.

[0085] Furthermore, both the first conductive layer 4 and the second conductive layer 6 are transparent and can be formed from conventional transparent conductive materials in the art, typically nanomaterials. For example, the first conductive layer 4 and the second conductive layer 6 may comprise one or more of indium tin oxide (ITO), indium zinc oxide (IZO), and silver nanowires, and the materials of the first conductive layer 4 and the second conductive layer 6 may be the same or different.

[0086] like Figure 3 and Figure 4 As shown, the display panel also includes an adhesive layer 9, which is used to bond the cover plate (protective layer 7) and the array substrate 1. Specifically, the cover plate (protective layer 7) and the array substrate 1 are bonded together by the adhesive layer 9, and the protective layer 7 is tensioned to complete the encapsulation of the display panel. Specifically, the protective layer 7, the adhesive layer 9, and the array substrate 1 are connected in sequence and enclosed to form a sealed accommodating space. The light-emitting device, the encapsulation layer 3, the first conductive layer 4, the light filter layer 5, and the second conductive layer 6 are located within this accommodating space. That is, the adhesive layer 9 is arranged around the pixel definition layer 22, the encapsulation layer 3, the first conductive layer 4, the light filter layer 5, and the second conductive layer 6, and is connected to the protective layer 7 on one side in the first direction and to the array substrate 1 on the other side in the first direction.

[0087] In specific implementation, light-emitting devices, such as OLED top-emitting devices, can be fabricated first, and multiple light-emitting devices can be spaced apart by a pixel definition layer 22. Then, the light-emitting devices are encapsulated, such as by thin-film encapsulation, to form the aforementioned encapsulation layer 3. Then, a first conductive layer 4 is formed on the encapsulation layer 3, and a first light-shielding layer 521 and a second light-shielding layer 522 are formed on the first conductive layer 4. These light-shielding layers can be formed by photolithography or inkjet printing, which is beneficial to the uniformity of parameters such as shape and height of these light-shielding layers. A second conductive layer 6 is formed on the material of the protective layer 7 to form a vibration layer. Then, the vibration layer is attached to the encapsulation layer 3 of the OLED device by frame mounting, so that the protective layer 7 is located on the side of the second conductive layer 6 away from the encapsulation layer 3, and the vibration layer is kept in a taut state. The materials of each film layer can be conventional materials of these layers in the art, and there are no particular limitations.

[0088] The display device provided in this embodiment of the invention includes the aforementioned display panel. This display device can be a display device such as an OLED display, or any product or component with display functionality, including the display device, such as a television, digital camera, mobile phone, or tablet computer. The advantages of this display device over the prior art are the same as those of the aforementioned display panel, and will not be repeated here.

[0089] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "located in," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection (network connection); they can refer to a direct connection, an indirect connection through an intermediate medium, or an internal connection between two elements. Those skilled in the art can understand the specific meanings of the above within the context of this invention based on the specific circumstances. Furthermore, terms such as "first" and "second" are used for descriptive purposes only, such as distinguishing components to more clearly illustrate / explain the technical solution, and should not be construed as indicating or implying the number of indicated technical features or a substantially significant order thereof.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, include: Array substrate; Multiple light-emitting devices disposed on the array substrate; A pixel definition layer that separates the plurality of light-emitting devices; A sound-emitting functional layer is stacked on the side of the light-emitting device away from the array substrate. The sound-emitting functional layer includes a first conductive layer, a filter layer and a second conductive layer stacked on the side of the light-emitting device away from the array substrate. The filter layer is located between the first conductive layer and the second conductive layer, and there is a gap between the filter layer and the second conductive layer. The filter layer includes a plurality of filters corresponding one-to-one with the plurality of light-emitting devices and a light-shielding layer spaced apart from the plurality of filters. With the side of the first conductive layer facing the second conductive layer as a reference, the height of the light-shielding layer is higher than the height of the filters. The light-shielding layer includes a first light-shielding layer and a second light-shielding layer. Taking the side of the first conductive layer facing the second conductive layer as a reference, the height of the first light-shielding layer is higher than the height of the second light-shielding layer. There is a gap between the first light-shielding layer and the second conductive layer, and there is a gap between the second light-shielding layer and the second conductive layer. The first light-shielding layer includes a plurality of first light-shielding structures, and the second light-shielding layer includes a plurality of second light-shielding structures. The first light-shielding structures and the second light-shielding structures are configured such that each pair of adjacent filters in the filter layer is spaced apart. The spacing between any two adjacent elements in the plurality of first light-shielding structures is greater than the spacing between any two adjacent elements in the plurality of second light-shielding structures.

2. The display panel according to claim 1, characterized in that, The difference between the height of the first light-shielding layer and the height of the second light-shielding layer is 5μm~10μm; And / or, the height of the first light-shielding layer is 4μm~20μm; And / or, the height of the second light-shielding layer is 2μm~5μm.

3. The display panel according to claim 1, characterized in that, The spacing between any two adjacent elements in the plurality of first light-shielding structures is 5 to 50 times the spacing between any two adjacent elements in the plurality of second light-shielding structures.

4. The display panel according to claim 3, characterized in that, The spacing between each adjacent pair in the first light-shielding structure is 0.5mm to 1.5mm.

5. The display panel according to any one of claims 1-4, characterized in that, The filter layer includes multiple filter regions, each filter region includes multiple filters, the second light-shielding layer is used to separate each two adjacent filters in each filter region; the first light-shielding layer is used to separate each two adjacent filter regions.

6. The display panel according to claim 5, characterized in that, The plurality of light-emitting devices include a first light-emitting device, a second light-emitting device, and a third light-emitting device distributed along a second direction, wherein each of the first light-emitting device, the second light-emitting device, and the third light-emitting device emits a different color. The plurality of filters includes a first filter corresponding to the first light-emitting device, a second filter corresponding to the second light-emitting device, and a third filter corresponding to the third light-emitting device; Each of the filtering regions comprises one or more filtering unit groups, and each filtering unit group comprises a first filter, a second filter, a third filter distributed along the second direction, and a second light-shielding layer spaced between the first filter and the second filter and spaced between the second filter and the third filter.

7. The display panel according to any one of claims 1-4, characterized in that, The distance between the filter and the second conductive layer is 5μm~10μm.

8. The display panel according to any one of claims 1-4, characterized in that, The sheet resistance of the first conductive layer is less than 40 ohms / □; And / or, the sheet resistance of the second conductive layer is not higher than 40 ohms / □.

9. The display panel according to any one of claims 1-4, characterized in that, The display panel further includes an encapsulation layer disposed between the light-emitting device and the first conductive layer; And / or, the display panel further includes a protective layer located on the side of the second conductive layer opposite to the array substrate.

10. The display panel according to claim 9, wherein the sum of the thickness of the protective layer and the thickness of the second conductive layer is 10 μm-100 μm.

11. The display panel according to any one of claims 10, wherein the protective layer comprises one or more of glass, polyimide, and polyethylene terephthalate.

12. The display panel according to any one of claims 9, wherein the display panel further comprises an adhesive layer, the protective layer, the adhesive layer, and the array substrate are sequentially connected and enclosed to form an accommodating space, and the plurality of light-emitting devices, the first conductive layer, the filter layer, and the second conductive layer are located within the accommodating space.

13. The display panel according to any one of claims 1, wherein the light-shielding layer is configured to form a plurality of grooves corresponding one-to-one with the plurality of filters, and each of the filters is located in one of the grooves.

14. A display device, characterized in that, Includes the display panel as described in any one of claims 1-13.

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