Display panel, manufacturing method and display device

Abstract

The present application discloses a display panel, a manufacturing method, and a display device, relating to the field of display technology, capable of improving the light transmittance of the display panel. The display panel comprises: a base substrate, the base substrate comprising a first display area and a second display area, the second display area at least partially surrounding the first display area, the pixel density within the first display area being lower than the pixel density within the second display area; a color filter film, the color filter film comprising a plurality of filter units, at least some of which are disposed in the first display area; and at least one optical waveguide structure disposed between adjacent filter units, the optical waveguide structure being configured to transmit light from one side of the display panel to the other side of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a preparation method, and a display device. Background Art

[0002] Currently, the market is demanding an increasingly higher screen-to-body ratio for consumer display products such as smartphones. Traditional waterdrop notches or notched screens are aesthetically pleasing and no longer meet consumer demands. Consequently, the development of under-display camera technology that enables full-screen display is urgently needed. Typically, a display panel contains an area that can simultaneously display and capture images. In addition to providing normal display, this area also needs to be light-transmissive to meet the camera's imaging requirements.

[0003] However, the existing under-screen camera technology has low light transmittance and the imaging effect of the under-screen camera is poor. Summary of the Invention

[0004] Embodiments of the present application provide a display panel, a manufacturing method, and a display device, which can improve the light transmittance of the display panel.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] a base substrate, the base substrate comprising a first display area and a second display area, the second display area at least partially surrounding the first display area, and a pixel density in the first display area being lower than a pixel density in the second display area;

[0007] a color filter film, the color filter film comprising a plurality of filter units, at least part of which is disposed in the first display area;

[0008] At least one optical waveguide structure is provided between adjacent filter units, and the optical waveguide structure is used to transmit light from one side of the display panel to the other side of the display panel.

[0009] In some embodiments, the optical waveguide structure is configured to transmit light from a display side of the display panel to a side of the display panel facing away from the display side.

[0010] In some embodiments, the optical waveguide structure is disposed in the first display area.

[0011] In some embodiments, the optical waveguide structure includes at least two conductive ends, and the optical waveguide structure is configured to allow light to enter from any conductive end and then be emitted from the other conductive ends.

[0012] In some embodiments, the display panel further includes:

[0013] The light shielding structure is disposed between adjacent filter units, and the optical waveguide structure is disposed between the light shielding structure and the filter units.

[0014] In some embodiments, the optical waveguide structure covers at least a portion of an edge of the light-shielding structure.

[0015] In some embodiments, the orthographic projection of the filter unit on the substrate covers a portion of the orthographic projection of the optical waveguide structure on the substrate; and / or,

[0016] The orthographic projection of the optical waveguide structure on the substrate completely covers the orthographic projection of the light shielding structure on the substrate; or,

[0017] The orthographic projection of the optical waveguide structure on the substrate covers a portion of the orthographic projection of the light shielding structure on the substrate.

[0018] In some embodiments, at least two optical waveguide structures are disposed between adjacent filter units.

[0019] In some embodiments, a plurality of the optical waveguide structures are disposed between adjacent filter units, the plurality of the optical waveguide structures are arranged along the edge of the light shielding structure, and the spacing between adjacent optical waveguide structures is in the range of 1-2 μm; and / or,

[0020] The thickness of the optical waveguide structure is smaller than the thickness difference between the filter unit and the light shielding structure; and / or,

[0021] In a cross section perpendicular to the display panel, a width of the light shielding structure covered by the optical waveguide structure is less than half of a width of the light shielding structure.

[0022] In some embodiments, the acute angle of the end face cut of the conductive end is in the range of 30-60°.

[0023] In some embodiments, the optical waveguide structure includes a first conductive end and a second conductive end, wherein the first conductive end is closer to the display side than the second conductive end.

[0024] In some embodiments, the acute angle of the end face cut angle of the first conductive end is close to the light shielding structure; and / or,

[0025] An acute angle among the cut angles of the end surface of the second conductive end is close to the light shielding structure.

[0026] In some embodiments, the optical waveguide structure is configured to allow incident light to be totally reflected within the optical waveguide structure, so as to transmit the light from one side of the display panel to the other side of the display panel.

[0027] In some embodiments, the optical waveguide structure includes an inner film layer and an outer film layer, the outer film layer wraps the inner film layer, and the refractive index of the inner film layer is greater than the refractive index of the outer film layer.

[0028] In some embodiments, the material of the optical waveguide structure includes silicon oxide.

[0029] According to a second aspect of the embodiments of the present application, a method for manufacturing a display panel is provided, comprising:

[0030] A plurality of optical waveguide structures are provided on one side of a base substrate, wherein the optical waveguide structures are used to transmit light from one side of a display panel to the other side of the display panel, the base substrate includes a first display area and a second display area, the second display area at least partially surrounds the first display area, and the pixel density in the first display area is less than the pixel density in the second display area;

[0031] A color filter film is provided at least in the first display area to obtain a plurality of filter units, so that at least one of the optical waveguide structures is located between adjacent filter units.

[0032] In some embodiments, providing a plurality of optical waveguide structures on one side of the substrate includes:

[0033] Arranging a plurality of the optical waveguide structures on one side of the substrate by using a film forming process and an etching process; or,

[0034] Before providing a plurality of optical waveguide structures on one side of the substrate, the method further includes:

[0035] preparing optical waveguide materials;

[0036] The multiple optical waveguide structures are provided on one side of the substrate, including:

[0037] The optical waveguide material is printed on one side of the base substrate to form an optical waveguide structure on the base substrate.

[0038] According to a third aspect of the embodiments of the present application, a display device is provided, including:

[0039] The display panel as described in the first aspect.

[0040] The display panel, manufacturing method, and display device provided in the embodiments of the present application can increase the transmittance of the first display area by setting the pixel density in the first display area to be lower than the pixel density in the second display area. The provision of a color filter film can prevent glare, increase transmittance, and reduce power consumption. Furthermore, by providing an optical waveguide structure between adjacent filter units, the optical waveguide structure can transmit light from one side of the display panel to the other side without affecting normal display function. The light transmitted by the optical waveguide structure can compensate for light loss blocked by the shading structure or film layer within the display panel, thereby increasing the transmittance of the display panel to meet the light transmission requirements of the under-screen camera imaging, thereby improving camera quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0042] Figure 2 A partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application;

[0043] Figure 3 A partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0044] Figure 4 A partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0045] Figure 5 A schematic cross-sectional view of an optical waveguide structure provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of a partial structure of another display panel provided in an embodiment of the present application;

[0047] Figure 7 A partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0048] Figure 8 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0049] Figure 9 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0051] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0052] Currently, the market is demanding an increasingly high screen-to-body ratio for display-based consumer products such as smartphones. However, the aesthetics of traditional waterdrop notches and notched displays are not up to par with consumer demand, leading to an urgent need for under-screen camera technology that can achieve full-screen display. Typically, a display panel has an area that can simultaneously display and capture images. In addition to providing normal display, this area also needs to be light-transmissive to meet the camera's imaging requirements. However, existing under-screen camera technology has low light transmittance, resulting in poor imaging quality.

[0053] In view of this, embodiments of the present application provide a display panel, a manufacturing method, and a display device, which can improve the light transmittance of the display panel.

[0054] In a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application; Figure 2 This is a partial cross-sectional diagram of a display panel provided in an embodiment of the present application. Figure 1The display panel provided in the embodiment of the present application includes: a base substrate 100, the base substrate 100 including a first display area 110 and a second display area 120, wherein the second display area 120 at least partially surrounds the first display area 110, may completely surround the first display area 110, or may partially surround the first display area 110, which is not specifically limited in the embodiment of the present application. It should be noted that the first display area 110 can serve as a display area corresponding to a functional device. The display panel corresponding to the first display area 110 can be provided with a functional device, such as a camera or flash, in the position of the display device to implement functions such as an under-screen camera or under-screen flash lighting, which is not specifically limited in the embodiment of the present application. Since the first display area 110 is used for corresponding functional devices, the transmittance of the first display area 110 needs to be higher than the transmittance of the second display area 120, so that the first display area 110 can better transmit light and enable the functional devices to function normally. Both the first display area 110 and the second display area 120 can display normally without affecting the screen-to-body ratio of the display panel. Therefore, by setting the pixel density in the first display area 110 to be smaller than the pixel density in the second display area 120 , the light transmittance of the first display area 110 can be increased.

[0055] like Figure 2 As shown, the display panel also includes a color filter 200. The color filter 200 can be set on one side of the base substrate 100. The color filter 200 includes a plurality of filter units 210, and at least part of the color filter 200 is set in the first display area 110. The color filter 200 can be set only in the first display area 110, or can be set in the first display area 110 and the second display area 120. The embodiment of the present application does not make specific limitations. The color filter 200 can play a role in filtering, passing light of a specific color and filtering out the rest of the light. It can replace the traditional polarizer and play the role of anti-glare, increasing light transmittance and reducing power consumption. The color of the color filter 200 can correspond to the color setting of the display pixel, and the filter unit 210 is set corresponding to the display pixel. The embodiment of the present application does not make specific limitations. The display panel provided in the embodiment of the present application can be a liquid crystal display panel, or it can be an actively luminous display panel, such as an organic light-emitting display panel, etc. The embodiment of the present application does not make specific limitations. Continue to refer to Figure 2At least one optical waveguide structure 300 is provided between adjacent filter units 210. The optical waveguide structure 300 is used to transmit light from one side of the display panel to the other side of the display panel. Since the first display area 110 serves as a functional display area, the transmittance of the first display area 110 needs to be greater. By providing an optical waveguide structure 300, the optical waveguide structure 300 can be a light-transmitting structure. By utilizing the optical waveguide structure 300, the light from one side of the display panel is transmitted to the other side of the display panel, which can improve the transmittance of the display panel. The optical waveguide structure 300 can be provided only in the first display area 110 to improve the transmittance of the first display area 110. The optical waveguide structure 300 can also be provided in both the second display area 120 and the first display area 110 to improve the overall transmittance of the display panel. For example, Figure 2 As shown, arrows represent the direction of light propagation. External light L on the display side D of the display panel can be transmitted to the back side of the display side D through the light waveguide structure 300. The light waveguide structure 300 is not restricted by light-shielding structures or film layers in transmitting external light L. External light L can also be transmitted from the back side of the display side D to the display side D through the light waveguide structure 300, but this is not specifically limited in this embodiment of the present application. Furthermore, since the filter units 210 are used for display, the light waveguide structure 300 is disposed between adjacent filter units 210 without affecting normal display functionality.

[0056] It should be noted that the pixels and drive circuits within the display panel may partially block light. This blocking structure or circuitry can affect the display panel's light transmission performance. While there are no specific light transmission requirements for the normal display area, the functional area under the screen does require higher light transmission to enable under-screen functions, such as imaging with an under-screen camera. With existing under-screen camera technology, the light transmission of the under-screen camera area of ​​the display panel is insufficient to meet the light requirements for normal camera imaging, severely impacting camera image quality.

[0057] To address the above situation, the display panel provided in the embodiment of the present application increases the light transmittance of the first display area 110 by setting the pixel density within the first display area 110 to be lower than the pixel density within the second display area 120. The color filter film 200 can prevent glare, increase light transmittance, and reduce power consumption. Furthermore, by providing a light waveguide structure 300 between adjacent filter units 210, the light waveguide structure 300 can transmit light from one side of the display panel to the other side without affecting normal display function. The light transmitted by the light waveguide structure 300 can compensate for light loss blocked by the shading structure or film layer within the display panel, thereby increasing the light transmittance of the display panel, thereby meeting the light transmission requirements of the under-screen camera for imaging and improving image quality.

[0058] In some embodiments, for example, the pixels in the display panel provided by the embodiments of the present application may be composed of three primary colors: red, green, and blue, and may be red sub-pixels, green sub-pixels, and blue sub-pixels, respectively. Figure 3 This is a partial cross-sectional diagram of another display panel provided in an embodiment of the present application. Figure 3 As shown, the red sub-pixel, green sub-pixel and blue sub-pixel may correspond to the red filter unit RF, the green filter unit GF and the blue filter unit BF respectively, that is, the filter unit 210 may include the red filter unit RF, the green filter unit GF and the blue filter unit BF. Figure 3 The display panel shown may be an organic light emitting display panel, Figure 3 The light emitting device is not shown. For example, the red sub-pixel, the green sub-pixel and the blue sub-pixel may correspond to a red light emitting device, a green light emitting device and a blue light emitting device. Figure 3 As shown, the display panel provided in the embodiment of the present application may further include: a shading structure 400, the shading structure 400 is arranged between adjacent filter units 210, and the optical waveguide structure 300 is arranged between the shading structure 400 and the filter unit 210. It should be noted that the shading structure 400 can be arranged on the display panel in the form of a shading pattern, and the shading pattern has a plurality of opening areas arranged in an array, and the opening areas are used to set the filter units 210. The setting of the shading structure 400 can avoid light mixing and large visual color deviation between adjacent filter units 210. It should be noted that a driving device can also be provided in the area covered by the shading structure 400. The driving device can drive the light-emitting device to emit light. The driving device is generally composed of at least one thin film transistor. The driving device can also include devices such as resistors and capacitors. Generally, part of the structure of the thin film transistor also has a shading property.

[0059] It is easy to understand that the shading structure 400 is disposed between adjacent filter units 210. The shading structure 400 blocks external light and also blocks light emitted by the light-emitting device, thereby preventing light mixing between adjacent sub-pixels and, in turn, preventing large viewing angle chromatic aberration caused by light mixing. The shading structure 400 does not affect the display function of the second display area 120, but it does affect the light transmittance of the first display area 110. A light waveguide structure 300 is disposed between the shading structure 400 and the filter units 210. The light waveguide structure 300 can transmit external light L from one side of the display panel to the other side of the display panel. Even if the shading structure 400 blocks some light from passing through the display panel, the light waveguide structure 300 can transmit at least some of the blocked light to the other side of the display panel, thereby allowing light to pass through and compensating for light blocked by the shading structure 400 or other shading films or structures. It can be understood that the optical waveguide structure 300 covers the shading structure 400. The optical waveguide structure 300 does not transmit light by light transmission, but realizes the function of light propagation by conducting light within the optical waveguide structure 300, that is, the optical waveguide structure 300 provides a propagation path for external light L, so that the external light L can bypass the shading structure 400 for propagation.

[0060] It should be noted that, in order to avoid uneven brightness at a large viewing angle between the first display area 110 and the second display area 120 , light shielding structures 400 may be provided in both the first display area 110 and the second display area 120 .

[0061] In some embodiments, the light waveguide structure 300 is disposed in the first display area 110. Since light transmittance does not affect the display function of the second display area 120, the light waveguide structure 300 can be disposed only in the first display area 110 to improve the light transmittance of the first display area 110, so that a camera disposed at a corresponding position in the first display area 110 can obtain sufficient light for imaging.

[0062] In some embodiments, reference Figure 3 The light waveguide structure 300 is used to transmit light from the display side D of the display panel to the side of the display panel facing away from the display side. When a camera located on the side of the display panel facing away from the display side D is in operation, external light L from the display side D can be transmitted through the light waveguide structure 300 to the camera. The camera can be the front camera of a smartphone. The provision of the light waveguide structure 300 can increase the amount of external light L that passes through the first display area 110, thereby increasing the amount of light captured by the camera and improving image quality.

[0063] For example, the light waveguide structure 300 can also transmit external light from the back side of the display side D of the display panel to the display side D, thereby improving the light transmittance of the display panel and can be used in a transparent display panel, which is not specifically limited in the present embodiment. It is easy to understand that the external light L is the ambient light outside the display panel.

[0064] In some embodiments, reference Figure 3 The orthographic projection of the optical waveguide structure 300 on the base substrate 100 completely covers the orthographic projection of the light-shielding structure 400 on the base substrate 100, that is, the optical waveguide structure 300 completely covers the light-shielding structure 400, which can increase the amount of light received from the external light L, transmit more external light to the back side of the display side D, and improve the transmittance of light.

[0065] In some embodiments, Figure 4 This is a partial cross-sectional diagram of another display panel provided in an embodiment of the present application. Figure 4 As shown, the orthographic projection of the light waveguide structure 300 on the base substrate 100 partially covers the orthographic projection of the light shielding structure 400 on the base substrate 100. The end face of the light waveguide structure 300 close to the display side D is used to receive external light L. After being guided by the light waveguide structure 300, the light L is emitted from the end face away from the display side D. This allows the external light L to bypass the light shielding structure 400 and be guided from the display side D to the back side of the display side D, allowing more external light to pass through the display panel for imaging by the under-screen camera.

[0066] In some embodiments, reference Figure 3 and Figure 4 The orthographic projection of the filter unit 210 on the base substrate 100 covers a portion of the orthographic projection of the optical waveguide structure 300 on the base substrate 100. The orthographic projection of the filter unit 210 on the base substrate 100 also covers a portion of the orthographic projection of the light shielding structure 400 on the base substrate 100. This ensures that the light shielding structure 400 does not block the light transmission of the optical waveguide structure 300 and ensures that the boundary between the optical waveguide structure 300 and the filter unit 210 are connected.

[0067] In some embodiments, the optical waveguide structure may include at least two conductive ends, and the optical waveguide structure is configured to allow light to enter from any conductive end and then be emitted from the other conductive ends.

[0068] Exemplary, reference Figure 4The optical waveguide structure 300 includes a first conductive end 310 and a second conductive end 320. The first conductive end 310 is closer to the display side D than the second conductive end 320. The first conductive end 310 is disposed on the surface of the light shielding structure 400 near the display side D, while the second conductive end 320 is disposed on a side of the light shielding structure 400, further away from the display side D than the first conductive end 310. External light L enters the optical waveguide structure 300 from the first conductive end 310, is guided through the interior of the optical waveguide structure 300, and is emitted from the second conductive end 320. The light transmission mechanism of the optical waveguide structure 300 allows the external light L to bypass the light shielding structure 400 and propagate from the display side D to the back side of the display side D. This allows the portion of the external light L blocked by the light shielding structure 400 to be guided from one side of the display panel to the other side, which can also be understood as compensating for the light blocked by the light shielding structure 400.

[0069] In some embodiments, the acute angle of the end face of the conductive end is in the range of 30-60°. Figure 4 As shown, the acute angle of the end face cut angle of the first conductive end 310 is in the range of 30-60°, and the acute angle of the end face cut angle of the second conductive end 320 is in the range of 30-60°.

[0070] For example, Figure 5 A schematic cross-sectional view of an optical waveguide structure provided in an embodiment of the present application. In the cross section of the optical waveguide structure 300, the angle between the end face of the first conductive end 310 and the corresponding connected side is the end face cutting angle. Usually, the end face cutting angle has an obtuse angle α and an acute angle β. The sum of the acute angle β and the obtuse angle α can be 180°, which is not specifically limited in the embodiment of the present application. The angle value range of the acute angle β in the end face cutting angle can be 30-60°, which is only exemplary and not specifically limited. It should be noted that Figure 5 The optical waveguide structure shown is a straight line, as shown in Figure 4 As shown, when the optical waveguide structure 300 covers the edge of the shading structure 40, the optical waveguide structure 300 is bent or folded along the shape of the edge of the shading structure 400, so that the first conductive end 310 is close to the display side D, and the second conductive end 320 is away from the display side D relative to the first conductive end 310, so that the external light L can be transmitted in the optical waveguide structure 300 by bypassing the shading structure 400.

[0071] In some embodiments, as Figure 4 As shown, the acute angle β of the end face cutting angle of the first conductive end 310 is close to the light shielding structure 400, so that the end face of the first conductive end 310 faces the display side and can receive more external light L.

[0072] In some embodiments, as Figure 4As shown, the acute angle β in the end face cutting angle of the second conductive end 320 is close to the shading structure 400, so that the end face of the second conductive end 320 is directed toward the side of the display panel away from the display side D, and the light incident from the first conductive end 310 can be directed toward the side of the display panel away from the display side D, so that the optical waveguide structure 300 can conduct the light from the display side D to the side away from the display side D.

[0073] In the display panel provided in the embodiment of the present application, the acute angle of the end face cut of the conducting end is arranged close to the light shielding structure 400, which can increase the amount of light received and transmitted by the optical waveguide structure 300, thereby improving the light transmittance of the display panel.

[0074] In some embodiments, the optical waveguide structure 300 is used to allow the incident light to be totally reflected and conducted within the optical waveguide structure 300, so as to conduct the light on one side of the display panel to the other side of the display panel. The optical waveguide structure 300 can achieve light conduction by utilizing the total reflection of light. For example, Figure 5 As shown, the external light L incident from the first conducting end 310 is totally reflected in the optical waveguide structure 300 and is emitted from the second conducting end 320 , thus completing the light transmission.

[0075] In the display panel provided in the embodiment of the present application, the optical waveguide structure 300 utilizes total reflection of light to conduct light, which can maintain high light conduction efficiency and conduction amount, and reduces light loss during the conduction process.

[0076] In some embodiments, as Figure 5 As shown, the optical waveguide structure 300 includes an inner film layer 330 and an outer film layer 340. The outer film layer 340 wraps the inner film layer 330. The refractive index of the inner film layer 330 is greater than the refractive index of the outer film layer 340. This can achieve a dense light-entry sparse light condition during the conduction of light within the optical waveguide structure 300, thereby achieving the condition of total internal reflection. For example, the optical waveguide structure 300 can adopt a structure similar to an optical fiber. The optical waveguide structure 300 can be cylindrical or polygonal, and the embodiment of the present application is not specifically limited thereto. The optical fiber-like structure is simple, easily achieves total internal reflection conduction, has high conduction efficiency, and low light loss.

[0077] It should be noted that the optical waveguide structure 300 may include more than two conducting ends, which may be set according to the specific shape of the optical waveguide structure 300 and are not specifically limited in the embodiment of the present application.

[0078] Exemplarily, the material of the optical waveguide structure 300 includes silicon oxide. Both the inner film layer 330 and the outer film layer 340 of the optical waveguide structure 300 may include silicon oxide, and different refractive indices may be obtained by laser irradiation induction, which is not specifically limited in the present embodiment.

[0079] In some embodiments, the optical waveguide structure 300 covers at least a portion of the edge of the light shielding structure 400. For example, Figure 4 As shown, the optical waveguide structure 300 covers the edge of the light-shielding structure 400 , exposing the end face of the first conductive end to receive external light L, so that the external light L can bypass the light-shielding structure 400 and propagate within the optical waveguide structure 300 .

[0080] In some embodiments, at least two optical waveguide structures 300 are disposed between adjacent filter units 210. For example, the at least two optical waveguide structures 300 may be stacked, tiled, or both, and this is not specifically limited in this embodiment. Both stacking and tiled configurations can increase the number of optical waveguide structures 300, thereby increasing the amount of transmitted light and improving the light transmittance of the display panel.

[0081] In the display panel provided by the embodiment of the present application, at least two optical waveguide structures 300 are disposed between adjacent filter units 210 , which can increase the amount of transmitted light and thereby improve the light transmittance of the display panel.

[0082] In some embodiments, a plurality of optical waveguide structures 300 are disposed between adjacent filter units 210 . The plurality of optical waveguide structures 300 are arranged along the edge of the light shielding structure 400 , and the spacing between adjacent optical waveguide structures 300 is in the range of 1-2 μm.

[0083] For example, Figure 6 This is a partial structural diagram of another display panel provided in an embodiment of the present application. Figure 6 As shown, adjacent filter units 210 can be two adjacent red filter units RF, a red filter unit RF also adjacent to a green filter unit GF, a red filter unit RF also adjacent to a blue filter unit BF, and a green filter unit GF also adjacent to a blue filter unit BF. Multiple optical waveguide structures 300 can be arranged flatly along the edge of the shading structure 400 between adjacent filter units 210, and can be arranged flatly at a set distance, with the set distance ranging from 1 to 2 μm. The multiple optical waveguide structures 300 can be arranged uniformly or non-uniformly along the edge of the shading structure 400, which is not specifically limited in this embodiment of the present application. Specifically, the optical waveguide structures 300 can be arranged along the edge of the opening area in the shading pattern, and the opening area of ​​the shading pattern is used to fill the color filter film 200. Figure 6 The number and arrangement of the optical waveguide structures 300 shown are for illustration only and are not intended to be a specific limitation of the embodiments of the present application.

[0084] For example, in a direction perpendicular to the display panel, when multiple optical waveguide structures 300 are arranged in a tiled manner, optical waveguide structures 300 may be stacked on the optical waveguide structures 300 to increase the number of optical waveguide structures 300 and thus increase the amount of conducted light.

[0085] For example, the optical waveguide structures 300 arranged at the edges of the openings of the light-shielding pattern can be integrated rather than spaced apart. This can increase the area of ​​the conductive end, thereby increasing the amount of incident light and improving the light transmittance of the display panel. The number and arrangement of the optical waveguide structures 300 can be configured according to specific needs.

[0086] In some embodiments, the thickness of the optical waveguide structure 300 is less than the thickness difference between the filter unit 210 and the light shielding structure 400. For example, when the optical waveguide structure 300 is cylindrical, the thickness of the optical waveguide structure 300 is the diameter of the cylindrical shape. Figure 4 As shown, the thickness of the optical waveguide structure 300 is less than the thickness difference between the filter unit 210 and the light shielding structure 400. This ensures that the optical waveguide structure 300 does not extend beyond the upper surface of the color filter film 200 and does not affect the thickness step difference of the remaining film layers. For example, the thickness here refers to the thickness in the direction perpendicular to the display panel. For example, the thickness of the optical waveguide structure 300 can be 2 μm.

[0087] In some embodiments, in a cross section perpendicular to the display panel, the width of the light shielding structure 400 covered by the optical waveguide structure 300 is less than half the width of the light shielding structure 400. For example, Figure 4 As shown, in a cross section perpendicular to the display panel, the width of the light shielding structure 400 covered by the optical waveguide structure 300 is a first width H1, and the width of the light shielding structure 400 is a second width H2, where the first width H1 is less than half of the second width H2. This ensures that the end faces of the first conductive ends 310 of different optical waveguide structures 300 do not block each other, leaving space between the first conductive ends 310 of different optical waveguide structures 300 to receive external light L. For example, the first width H1 can be approximately 10 μm, or less than 10 microns.

[0088] The display panel provided in the embodiment of the present application ensures that the light waveguide structure 300 can transmit more external light L by setting the relevant dimensions of the light waveguide structure 300 and the dimension relationship of the light shielding structure 400 and the filter unit 210, thereby improving the light transmittance of the display panel in the corresponding area.

[0089] For example, Figure 7 This is a partial cross-sectional diagram of another display panel provided in an embodiment of the present application. Figure 7As shown, the display panel also includes a driver 500 and a light-emitting device. The driver 500 is used to drive the light-emitting device to emit light. The light-emitting device corresponds to the color of the filter unit. The light-emitting device includes a red light-emitting device R, a green light-emitting device G, and a blue light-emitting device B. The light-emitting device and the corresponding filter unit can form a display pixel. The red light-emitting device R is used to form a red sub-pixel, the green light-emitting device G is used to form a green sub-pixel, and the blue light-emitting device B is used to form a blue sub-pixel. The driver 500 includes a thin-film transistor. The display panel also includes an isolation layer 600, an encapsulation layer 700, and a planarization layer 800. The isolation layer 600 can include a multi-layer structure. An insulating isolation layer is required between different metal layers or different conductive layers to provide insulation. The isolation layer 600 can include a gate insulation layer, an organic insulation layer, etc., which is not specifically limited in this embodiment of the present application. The encapsulation layer 700 can protect the light-emitting device from water and oxygen corrosion in the external environment to ensure that the service life of the display panel is not affected. The planarization layer 800 can smooth the structural differences on the surface of the display panel, making the display panel surface more flat. A pixel-defining structure 900 is also provided between adjacent light-emitting devices to isolate the light-emitting layer materials of different light-emitting devices, allowing each light-emitting device to emit light independently. It should be noted that the pixel density within the first display area 110 is lower than the pixel density within the second display area 120. This can be achieved by setting the area of ​​the orthographic projection of the light-emitting devices in the first display area 110 onto the substrate 100 to be smaller than the area of ​​the orthographic projection of the light-emitting devices in the second display area 120 onto the substrate 100. This can improve the light transmittance of the first display area 110. The area of ​​the light-emitting devices is positively correlated with the area of ​​the corresponding filter unit.

[0090] A second aspect of the embodiments of the present application provides a method for manufacturing a display panel. Figure 8 This is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. Figure 8 As shown, the method for manufacturing a display panel provided in an embodiment of the present application includes:

[0091] S101: A plurality of optical waveguide structures are provided on one side of a base substrate, wherein the optical waveguide structures are used to transmit light from one side of a display panel to the other side of the display panel, the base substrate includes a first display area and a second display area, the second display area at least partially surrounds the first display area, and a pixel density in the first display area is less than a pixel density in the second display area.

[0092] refer to Figure 1 and Figure 2, the first display area 110 can be used as the display area corresponding to the functional device. The display panel corresponding to the first display area 110 can be provided with functional devices, such as cameras, flashes, etc., at the position of the display device to realize functions such as under-screen cameras or under-screen flash lighting. This is not specifically limited in the embodiments of the present application. Since the first display area 110 is used for corresponding functional devices, the transmittance of the first display area 110 needs to be higher than the transmittance of the second display area 120, so that the first display area 110 can better transmit light so that the functional devices can be used normally. Both the first display area 110 and the second display area 120 can display normally, and will not affect the screen-to-body ratio of the display panel. Therefore, setting the pixel density in the first display area 110 to be lower than the pixel density in the second display area 120 can increase the transmittance of the first display area 110.

[0093] S102: Disposing a color filter film at least in the first display area to obtain a plurality of filter units, so that at least one optical waveguide structure is located between adjacent filter units.

[0094] refer to Figure 1 and Figure 2 , the color filter film 200 can be set on one side of the base substrate 100, and the color filter film 200 includes a plurality of filter units 210, and at least part of the color filter film 200 is set in the first display area 110. The color filter film 200 can be set only in the first display area 110, and can also be set in the first display area 110 and the second display area 120, which is not specifically limited in the embodiment of the present application. The color filter film 200 can play a role in filtering, passing light of a specific color and filtering out the rest of the light, and can replace the traditional polarizer to play the role of anti-glare, increase light transmittance and reduce power consumption. The color of the color filter film 200 can correspond to the color setting of the display pixel, and the filter unit 210 is set corresponding to the display pixel, which is not specifically limited in the embodiment of the present application. The display panel provided in the embodiment of the present application can be a liquid crystal display panel, or it can be an actively luminous display panel, such as an organic light-emitting display panel, etc., which is not specifically limited in the embodiment of the present application. Continue to refer to Figure 2At least one optical waveguide structure 300 is provided between adjacent filter units 210. The optical waveguide structure 300 is used to transmit light from one side of the display panel to the other side of the display panel. Since the first display area 110 serves as a functional display area, the transmittance of the first display area 110 needs to be greater. By providing an optical waveguide structure 300, the optical waveguide structure 300 can be a light-transmitting structure. By utilizing the optical waveguide structure 300, the light from one side of the display panel is transmitted to the other side of the display panel, which can improve the transmittance of the display panel. The optical waveguide structure 300 can be provided only in the first display area 110 to improve the transmittance of the first display area 110. The optical waveguide structure 300 can also be provided in both the second display area 120 and the first display area 110 to improve the overall transmittance of the display panel. For example, Figure 2 As shown, arrows represent the direction of light propagation. External light L on the display side D of the display panel can be transmitted to the back side of the display side D through the light waveguide structure 300. The light waveguide structure 300 is not restricted by light-shielding structures or film layers in transmitting external light L. External light L can also be transmitted from the back side of the display side D to the display side D through the light waveguide structure 300, but this is not specifically limited in this embodiment of the present application. Furthermore, since the filter units 210 are used for display, the light waveguide structure 300 is disposed between adjacent filter units 210 without affecting normal display functionality.

[0095] It should be noted that the pixels and drive circuits within the display panel may partially block light. This blocking structure or circuitry can affect the display panel's light transmission performance. While there are no specific light transmission requirements for the normal display area, the functional area under the screen does require higher light transmission to enable under-screen functions, such as imaging with an under-screen camera. With existing under-screen camera technology, the light transmission of the under-screen camera area of ​​the display panel is insufficient to meet the light requirements for normal camera imaging, severely impacting camera image quality.

[0096] To address the above situation, the display panel manufacturing method provided in the embodiments of the present application increases the light transmittance of the first display area 110 by setting the pixel density within the first display area 110 to be lower than the pixel density within the second display area 120. The color filter film 200 can prevent glare, increase light transmittance, and reduce power consumption. Furthermore, by providing a light waveguide structure 300 between adjacent filter units 210, the light waveguide structure 300 can transmit light from one side of the display panel to the other side without affecting normal display function. The light transmitted by the light waveguide structure 300 can compensate for light loss blocked by the shading structure or film layer within the display panel, thereby increasing the light transmittance of the display panel, thereby meeting the light transmission requirements of the under-screen camera for imaging and improving image quality.

[0097] Exemplary, reference Figure 7On one side of the base substrate 100, a driver device 500 and driver circuits, a light-emitting device, an encapsulation layer 700, a light-shielding structure 400, an optical waveguide structure 300, a color filter 200, and a planar layer 800 can be sequentially fabricated. During the fabrication of the driver device 500 and driver circuits, an isolation layer 600 is used to insulate the conductive layers or electrodes. During the fabrication of the light-emitting device, a pixel-defining structure 900 is used to isolate the light-emitting layers of different light-emitting devices. Most of the driver circuits need to be located in the non-display area.

[0098] In some embodiments, step S101 includes:

[0099] Multiple optical waveguide structures are formed on one side of a substrate using film formation and etching processes. The optical waveguide structures can be produced through film formation and etching of the film layers. The film formation process can be chemical vapor deposition or atomic layer deposition. The etching process can include photoresist coating, exposure, development, and etching. Etching can be dry etching. The film layers formed can be stacked with film layers of different refractive indices. After etching, an optical waveguide structure with an optical fiber-like structure can be obtained.

[0100] or,

[0101] Before step S101, the method further includes:

[0102] Preparation of optical waveguide materials. Optical waveguide materials can be exposed and induced by laser irradiation to obtain optical waveguide materials with different refractive indices.

[0103] Step S101 includes:

[0104] The optical waveguide material is printed on one side of the substrate to form an optical waveguide structure on the substrate.

[0105] The printing method can be 3D printing or printing, which is not specifically limited in the embodiments of the present application.

[0106] According to a third aspect of the present application, a display device is provided. Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Figure 9 As shown, the display device provided in the embodiment of the present application includes: the display panel 1000 as described in the first aspect.

[0107] The display device may further include a camera. The camera may be disposed at a position corresponding to the first display area of ​​the display panel. The camera may form an image through light passing through the first display area.

[0108] It should be noted that the display device can be a smart phone, a tablet computer, a laptop computer, a television or other display, and the embodiments of the present application do not specifically limit it.

[0109] The display device provided in the embodiments of the present application increases the light transmittance of the first display area by setting the pixel density in the first display area to be lower than the pixel density in the second display area. The provision of a color filter film can prevent glare, increase light transmittance, and reduce power consumption. Furthermore, by providing a light waveguide structure between adjacent filter units, the light waveguide structure is used to transmit light from one side of the display panel to the other side without affecting normal display function. The light transmitted by the light waveguide structure can compensate for light loss blocked by the shading structure or film layer in the display panel, thereby increasing the light transmittance of the display panel to meet the light transmission requirements of the under-screen camera imaging, thereby improving camera quality.

[0110] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0111] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

Claims

1. A display panel, characterized in that: include: a base substrate, the base substrate comprising a first display area and a second display area, the second display area at least partially surrounding the first display area, and a pixel density in the first display area being lower than a pixel density in the second display area; a color filter film, the color filter film comprising a plurality of filter units, at least part of which is disposed in the first display area; At least one optical waveguide structure is provided between adjacent filter units, and the optical waveguide structure is used to transmit light from one side of the display panel to the other side of the display panel; The light shielding structure is disposed between adjacent filter units, and the optical waveguide structure is disposed between the light shielding structure and the filter units.

2. The display panel according to claim 1, wherein: The optical waveguide structure is used to transmit light from the display side of the display panel to a side of the display panel away from the display side.

3. The display panel according to claim 1, wherein: The optical waveguide structure is disposed in the first display area.

4. The display panel according to claim 1, wherein: The optical waveguide structure includes at least two conducting ends, and the optical waveguide structure is used to allow light to enter from any conducting end and then be emitted from the other conducting ends.

5. The display panel according to claim 1, wherein: The optical waveguide structure covers at least a portion of an edge of the light-shielding structure.

6. The display panel according to claim 1, wherein: The orthographic projection of the filter unit on the substrate covers a portion of the orthographic projection of the optical waveguide structure on the substrate; and / or, The orthographic projection of the optical waveguide structure on the substrate completely covers the orthographic projection of the light shielding structure on the substrate; or, The orthographic projection of the optical waveguide structure on the substrate covers a portion of the orthographic projection of the light shielding structure on the substrate.

7. The display panel according to claim 1, wherein: At least two optical waveguide structures are arranged between adjacent filter units.

8. The display panel according to claim 7, wherein: A plurality of the optical waveguide structures are provided between adjacent filter units, and the plurality of the optical waveguide structures are arranged along the edge of the light shielding structure, and the spacing between adjacent optical waveguide structures is in the range of 1-2 μm; and / or, The thickness of the optical waveguide structure is smaller than the thickness difference between the filter unit and the light shielding structure; and / or, In a cross section perpendicular to the display panel, a width of the light shielding structure covered by the optical waveguide structure is less than half of a width of the light shielding structure.

9. The display panel according to claim 4, wherein: The acute angle of the end face cut angle of the conductive end is in the range of 30-60°.

10. The display panel according to claim 1, wherein The optical waveguide structure includes a first conductive end and a second conductive end, wherein the first conductive end is closer to the display side than the second conductive end.

11. The display panel according to claim 10, wherein: The acute angle of the end face cut angle of the first conductive end is close to the light shielding structure; and / or, An acute angle among the cut angles of the end surface of the second conductive end is close to the light shielding structure.

12. The display panel according to claim 1, wherein The optical waveguide structure is used to allow incident light to be totally reflected and conducted within the optical waveguide structure, so as to conduct the light on one side of the display panel to the other side of the display panel.

13. The display panel according to claim 1, wherein The optical waveguide structure includes an inner film layer and an outer film layer, wherein the outer film layer wraps the inner film layer, and the refractive index of the inner film layer is greater than the refractive index of the outer film layer.

14. The display panel according to claim 1, wherein The material of the optical waveguide structure includes silicon oxide.

15. A method for preparing a display panel, characterized in that: For preparing a display panel according to any one of claims 1 to 14, the method comprising: A plurality of optical waveguide structures are provided on one side of a base substrate, wherein the optical waveguide structures are used to transmit light from one side of a display panel to the other side of the display panel, the base substrate includes a first display area and a second display area, the second display area at least partially surrounds the first display area, and the pixel density in the first display area is less than the pixel density in the second display area; A color filter film is provided at least in the first display area to obtain a plurality of filter units, so that at least one of the optical waveguide structures is located between adjacent filter units.

16. The method for manufacturing a display panel according to claim 15, wherein: The multiple optical waveguide structures are provided on one side of the substrate, including: Arranging a plurality of the optical waveguide structures on one side of the substrate by using a film forming process and an etching process; or, Before providing a plurality of optical waveguide structures on one side of the substrate, the method further includes: preparing optical waveguide materials; The multiple optical waveguide structures are provided on one side of the substrate, including: The optical waveguide material is printed on one side of the base substrate to form an optical waveguide structure on the base substrate.

17. A display device, characterized in that: include: The display panel according to any one of claims 1 to 14.

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