Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises: a substrate; the light-emitting functional layer is arranged on one side of the substrate, and the light-emitting functional layer comprises a plurality of light-emitting units; the light filtering function layer is arranged on the side, away from the substrate, of the light emitting function layer, the light filtering function layer comprises a first focusing structure film layer, a light filtering layer and a second focusing structure film layer, the first focusing structure film layer comprises a plurality of first focusing units, the second focusing structure film layer comprises a plurality of second focusing units, and the light filtering layer comprises a plurality of second focusing units. The first focusing units correspond to the second focusing units in a one-to-one matching mode, the light filtering layer is arranged at the focal points of the first focusing units and the second focusing units, and the light filtering layer is provided with light holes which are used for light rays converged by the first focusing units to penetrate through. In this way, part of light penetrates through the light hole and is emitted out through the second focusing unit, peep prevention under a certain visual angle is achieved, and the brightness of the display panel is not lost.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display technology is regarded as the most promising new flat-panel display technology of the next generation. It is widely used, such as in vehicle-mounted displays. At this time, it is necessary to solve the problems of anti-peeping and suppressing light pollution. In current implementations, most of them adopt an external anti-peep film structure for anti-peeping, which meets the anti-peeping requirements within a certain range, but reduces the brightness of the display panel.

[0003] To this end, existing display panels need to be improved. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display panel and a display device, which are intended to meet the requirements of anti-peeping and improve user experience.

[0005] To achieve the above objectives, this application adopts the following technical solutions.

[0006] A display panel, comprising:

[0007] substrate;

[0008] A light-emitting functional layer, wherein the light-emitting functional layer is disposed on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting units;

[0009] A light filtering functional layer, wherein the light filtering functional layer is arranged on a side of the light emitting functional layer away from the substrate, and the light filtering functional layer comprises a first focusing structure film layer and a light filtering layer which are sequentially stacked in a direction away from the substrate,

[0010] The first focusing structure film layer includes a plurality of first focusing units, the filter layer includes a plurality of light-transmitting holes, the first focusing units are matched one by one with the light-transmitting holes, and the focus of the first focusing unit is located in the light-transmitting hole corresponding thereto.

[0011] The light emitted by the light emitting unit is partially passed through the light-transmitting hole after being converged by the first focusing unit. In this way, the part of the light focused by the first focusing unit passes through the light-transmitting hole without attenuation, realizing anti-peeping at a certain viewing angle without losing the brightness of the display panel.

[0012] Preferably, the filter layer is located at the focal point of the first focusing unit and the second focusing unit and the filter layer has a plurality of light-transmitting holes, and the light-transmitting holes are matched one by one with the corresponding first focusing units.

[0013] In one embodiment, in the display panel, the filter function layer further comprises a second focusing structure film layer located in the filter layer and away from the first focusing structure film layer, the second focusing structure film layer comprises a plurality of second focusing units, and the second focusing units correspond to the first focusing units one by one;

[0014] Preferably, the light emitted by the light emitting unit is converged by the first focusing unit and then partially passes through the light-transmitting hole and then is emitted through the matching second focusing unit;

[0015] Preferably, the distance between the filter layer and the first focusing unit is equal to the focal length of the first focusing unit, and / or the distance between the filter layer and the second focusing unit is equal to the focal length of the second focusing unit;

[0016] Preferably, the focal length of the first focusing unit is the same as the focal length of the second focusing unit;

[0017] Preferably, the first focusing unit and the second focusing unit are convex lens-shaped or the cross section of their optical axes are elliptical. In this way, part of the light emitted by the light-emitting unit is converged by the first focusing unit and passes through the light-transmitting hole, and then is emitted after passing through the second focusing unit. In this way, part of the light focused by the first focusing unit passes through the perforated light-transmitting hole without attenuation, thereby realizing anti-peeping at a certain viewing angle without losing the brightness of the display panel.

[0018] In one embodiment, the first focusing unit matches the corresponding light emitting unit one by one;

[0019] The first focusing unit matches the combination of periodic light-emitting units one by one.

[0020] In one embodiment, along a cross section perpendicular to the plane where the filter layer is located, the cross section of the light-transmitting hole is rectangular;

[0021] Preferably, along a cross section perpendicular to the plane where the filter layer is located, the cross section of the light-transmitting hole is in a trumpet shape.

[0022] In one embodiment, the display panel further includes a plurality of light shielding units located between the light transmission holes, and the light transmission holes are through holes;

[0023] Preferably, the material of the shading unit includes shading glue;

[0024] Preferably, the light transmittance of the shading unit is less than 1%;

[0025] Preferably, the light transmittance of the shading unit is lower than 0.1%;

[0026] Preferably, the light transmittance of the shading unit is lower than 0.01%.

[0027] In one embodiment, the display panel further includes a packaging layer, and the packaging is arranged between the light-emitting functional layer and the first focusing structure film layer.

[0028] In one embodiment, the filter function layer in the display panel further includes an organic glue layer, wherein the organic glue layer includes a first organic glue layer disposed between the first focusing structure film layer and the filter layer and / or a second organic glue layer disposed between the second focusing structure film layer and the filter layer;

[0029] Preferably, the organic glue layer comprises transparent organic glue.

[0030] In one embodiment, the filter layer is an electrochromic layer, and the filter layer forms the light-transmitting holes and the shielding units in specific areas by changing color;

[0031] Alternatively, the filter layer is an electrochromic layer, the filter layer comprises a plurality of light-transmitting holes, the light-transmitting holes are through holes, and the filter layer forms a shielding unit between the light-transmitting holes by changing color;

[0032] Preferably, the electrochromic layer comprises a first electrode layer, a color-changing layer and a second electrode layer which are sequentially stacked in a direction away from the substrate;

[0033] Preferably, the first electrode layer includes a first electrode, the second electrode layer includes a second electrode, and the first electrode and the second electrode are electrically connected to the driving layer respectively;

[0034] Preferably, the first electrode and the second electrode are respectively made of indium tin oxide (ITO).

[0035] In one embodiment, the filter function layer further includes an organic glue layer, and the organic glue layer is disposed between the first focusing structure film layer and the filter layer and / or between the second focusing structure film layer and the filter layer;

[0036] Preferably, the mechanical glue layer comprises transparent organic glue. In this way, the position of the filter layer is adjusted through the organic glue layer so that it is located at the focus / focal length of the first focusing unit and the second focusing unit.

[0037] In one embodiment, the material of the color-changing layer can be selected from at least one of tungsten oxide, polyaniline, viologen, fluoran, triphenylamine, anthraquinone, carbazole and derivatives thereof.

[0038] Based on the same inventive concept, the present application proposes a display device, which includes the above-mentioned display panel.

[0039] Compared with the prior art, the display panel proposed in the present application is provided with a filter function layer, which includes a first focusing structure film layer and a filter layer or a first focusing structure film layer, a filter layer and a second focusing structure film layer. The filter layer is located at the focus / focal plane of the first focusing unit of the first focusing structure film layer and at the focus / focal plane of the second focusing unit of the second focusing structure film layer, and the filter layer has a light-transmitting hole, which matches the first focusing unit one by one, and part of the light focused by the first focusing unit passes through the light-transmitting hole without attenuation / exhaustion, or part of the light focused by the first focusing unit passes through the light-transmitting hole without exhaustion and then is emitted through the second focusing unit, thereby realizing anti-peeping at a certain viewing angle without losing the brightness of the display panel. Preferably, the filter layer can adopt electrochromic, through which dynamic anti-peeping can be realized based on setting to an existing anti-peeping mode or a shared mode, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic diagram of the structure of a display panel according to an embodiment of the present application;

[0042] Figure 2 is a schematic cross-sectional view of a display panel according to an embodiment of the present application;

[0043] Figure 2a for Figure 2 A schematic cross-sectional view of a filter functional layer in one embodiment;

[0044] Figure 2b for Figure 2 A schematic cross-sectional view of a filter functional layer in another embodiment;

[0045] Figure 3 This is a schematic diagram of a viewing angle of 0° in an embodiment of the present application;

[0046] Figure 4 This is a schematic diagram of a viewing angle of 20° in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of light emitted by a light-emitting unit according to an embodiment of the present application passing through a light filtering functional layer;

[0048] Figure 5a A schematic diagram of a cross-sectional light beam of a filter layer according to an embodiment of the present application;

[0049] Figure 5bA schematic diagram of a cross-sectional light beam of a filter layer according to another embodiment of the present application;

[0050] Figure 6 is a cross-sectional schematic diagram of an electrochromic layer according to an embodiment of the present application;

[0051] Figure 7 FIG. 4 is a schematic diagram of the viewing angle of the display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0053] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] When the display panel is used in a vehicle, it needs to meet the requirements of normal display while achieving anti-peeping and suppressing light pollution to prevent the driver from being distracted. When used for in-vehicle co-pilot display, it needs to be all-round anti-peeping and suppress light pollution. The current in-vehicle display uses an external anti-peep film, which meets the anti-peeping requirements within a certain range, but reduces the brightness of the display panel.

[0055] Based on this discovery, the applicant has improved the structure of the existing display panel, which achieves anti-peeping while not losing the display brightness within a preset visible viewing angle range, thereby improving the user experience.

[0056] Next, the display panel and the display device proposed in the present application are described with reference to the accompanying drawings.

[0057] like Figure 1 FIG. 4 is a schematic diagram of a display panel according to an embodiment of the present application.

[0058] The display panel 100 includes a display area 110 (also called AA area) and a non-display area 120 (also called frame area / NA area) at least partially surrounding one side of the outer periphery of the display area 110. The non-display area 120 is provided with a binding area (not shown), which is used to carry binding components in subsequent processes.

[0059] The display area 110 includes light-emitting units 111 arranged in an array, each light-emitting unit 111 includes a plurality of pixels, such as red pixels, green pixels and blue pixels. In this embodiment, the arrangement of red pixels, green pixels and blue pixels is not limited. Each pixel is matched with a pixel driving circuit and a light-emitting device.

[0060] Figure 2 for Figure 1 The display panel in the thickness direction (z direction) includes:

[0061] Substrate 130: The substrate 130 covers the display area and the non-display area. It is a flexible substrate. Its material can be selected from polyimide (PI), polyethylene naphthalate (PEN) or polyethylene terephthalate (PET), etc. The material can also be a mixed material of the above materials, or the substrate 130 can be a hard substrate, such as glass. The substrate 130 has a driving layer, which includes a driving circuit and a variety of signal lines.

[0062] The light-emitting functional layer 140 is arranged on one side of the substrate 130, and the light-emitting functional layer includes a plurality of light-emitting units 111. Each light-emitting unit 111 includes a plurality of light-emitting devices, such as each light-emitting unit includes 3 light-emitting devices. Each light-emitting device is connected to a matching driving circuit and emits light based on the driving of the driving circuit.

[0063] The light filtering function layer 150 is disposed on a side of the light emitting function layer 140 away from the substrate 130. Figure 2aThe filter function layer 150 shown includes a first focusing structure film layer 151 and a filter layer 152 which are sequentially stacked in a direction away from the substrate. Preferably, a first organic glue layer 154 (such as a transparent organic glue layer) is arranged between the first focusing structure film layer 151 and the filter layer 152. By arranging the first organic glue layer 154, the focus of the first focusing unit in the filter layer 152 is located in the light-transmitting hole corresponding thereto, and part of the light emitted by the light-emitting unit passes through the light-transmitting hole after being converged by the first focusing unit. The light can pass through the light-transmitting hole smoothly, thus achieving anti-peeping while not changing / reducing the display brightness. It should be noted that the focus is an inherent property of the first focusing unit, which is located on the light-transmitting axis of the first focusing unit. For the light parallel to the light-transmitting axis direction incident on the first focusing unit, the convergence point of the outgoing light overlaps with the focus, so that the light converged by the first focusing unit can pass through the light-transmitting hole. When light from other angles enters the first focusing unit, the convergence point of the outgoing light is offset from the focal point and may not be able to pass through the light-transmitting hole. If light from other directions needs to pass through the light-transmitting hole smoothly, the light-transmitting hole can be made larger to enable light from other angles to pass through smoothly, thereby achieving anti-peeping effect.

[0064] As Figure 2a Variations of the embodiments, such as Figure 2b The filter function layer 150 shown includes a first focusing structure film layer 151, a filter layer 152, and a second focusing structure film layer 153 which are sequentially stacked in a direction away from the substrate. Preferably, a first organic glue layer 154 (such as a transparent organic glue layer) is disposed between the first focusing structure film layer 151 and the filter layer 152, and a second organic glue layer 155 (such as a transparent organic glue layer) is disposed between the second focusing structure film layer 153 and the filter layer 152. By disposing the first organic glue layer 154, the focus of the first focusing unit in the filter layer 152 is located in the light-transmitting hole corresponding thereto, and the light emitted by the light-emitting unit is partially converged by the first focusing unit and then partially passes through the light-transmitting hole and is emitted after being adjusted by the second focusing unit in the second focusing structure film layer 153. Preferably, the filter layer 152 can be located at the focus of the second focusing unit in the second focusing structure film layer 153, which can be adjusted by the second organic glue layer 155. The first organic glue layer 154 and the second organic glue layer 155 are collectively referred to as organic glue layers.

[0065] The first focusing structure film layer includes a plurality of first focusing units (micro lens array, MLA, Micro Lens Array), the second focusing structure film layer includes a plurality of second focusing units (micro lens array, MLA, Micro Lens Array), and the first focusing units are matched one by one with the corresponding second focusing units. Preferably, the focal length of the first focusing unit is the same as the focal length of the second focusing unit. In other embodiments, the focal length of the first focusing unit is different from the focal length of the second focusing unit, and the distance between the filter layer and the first focusing unit is equal to the focal length of the first focusing unit, that is, the filter layer is arranged at the focus of the first focusing unit (the focus when parallel to the optical axis direction, and the focus of light with different incident angles is different for the first focusing unit), and at the same time, it is also the focus of the second focusing unit (the distance between the filter layer and the second focusing unit is equal to the focal length of the second focusing unit). That is, the distance between the filter layer and the first focusing unit is equal to the focal length of the first focusing unit, and / or, the distance between the filter layer and the second focusing unit is equal to the focal length of the second focusing unit. In this way, the light output direction can be controlled and the displayed image quality can be improved at the same time. The first focusing unit and the second focusing unit are respectively in the shape of convex lenses or the cross-section of their optical axes is elliptical. In this embodiment, the first focusing unit matches the corresponding light-emitting units one by one. In other embodiments, the first focusing unit matches periodic light-emitting units (such as a group of 4 light-emitting units, a combination of 2 (x direction) * 2 (y direction), such as a group of 9 light-emitting units, a structure of 3 (x direction) * 3 (y direction), a group of 8 light-emitting units, a structure of 4 (x direction) * 2 (y direction)). Preferably, high-quality display can also be achieved by using program matching at this time.

[0066] The filter layer is provided with a light-transmitting hole, and the cross-sectional shape of the light-transmitting hole along the cross section perpendicular to the plane where the filter layer is located is rectangular or trumpet-shaped. Light / rays emitted from different directions by the light-emitting unit have different focal points after being converged by the first focusing unit, so that part of the light / rays pass through the light-transmitting hole and are converted by the second focusing structure (seen by the user, that is, the viewing angle, such as the viewing angle θ is between 0°-45°, 0°-40° or 0°-30°, depending on the application scenario), so that the content displayed on the display panel can be seen within the preset viewing angle range (while suppressing light pollution, the anti-peeping function is achieved), and this part of the light passes through the light-transmitting hole, so that there is almost no loss in display brightness. Taking the vertical normal of the display panel 100 as the standard, the viewing angle in the direction of the vertical normal is 0°, and the displayed image can still be viewed normally at a certain angle to the left, right, above or below the normal (the angle between the position and the vertical normal), that is, within the range of the viewing angle θ, see Figure 7 .

[0067] The filter layer includes light-transmitting holes and light-shielding units located between the light-transmitting holes, and the light-transmitting holes are through holes. The material of the light-shielding unit includes light-shielding glue (such as BM glue solidified). The light transmittance of the light-shielding unit is lower than 1%. Preferably, the light transmittance of the light-shielding unit is lower than 0.5%, and further, the light transmittance of the light-shielding unit is lower than 0.1%. Further, the light transmittance of the light-shielding unit is lower than 0.05%. Further, the light transmittance of the light-shielding unit is lower than 0.01%.

[0068] like Figure 3 The figure shows a visual angle of 0°. The light a emitted by the light emitting unit is parallel or approximately parallel to the axis of the first focusing unit 151. After being focused by the first focusing unit 151, the light is emitted through the light-transmitting hole 152a of the filter layer 152 and then emitted in parallel through the second focusing unit 153, i.e., the visual angle is 0°. Parallel light will converge at the position of the filter plate. The convergence points of parallel light in different directions are different. The convergence point of horizontal parallel light is the center position (focus), while the convergence points of light in other directions are outside the center point (focus). Figure 4 The figure shows a schematic diagram of a viewing angle of 20°. The angle between the light b emitted by the light emitting unit and the axis of the first focusing unit 151 is 20°. After being focused by the first focusing unit 151, the light is emitted through the light-transmitting hole 152a of the filter layer 152 and then emitted through the second focusing unit 153. If the viewing angle ranges from 0° to 20°, the angle between the light b emitted by the light emitting unit and the axis of the first focusing unit 151 is greater than 20°. At this time, this part of the light is filtered out by the filter layer 152. In this way, the focus of light from different directions after being converged / focused by the first focusing unit 151 is different. Through the filter layer, the direction of the light can be controlled (for example, when 0°, only a small hole is required to be set in the filter layer, and the diameter / size of the small hole is adjusted to control the light at different angles). The filter layer has a light-transmitting hole, through which light at a certain angle (that is, within the range of the viewing angle) passes, and anti-peeping at a certain viewing angle is achieved. Because the light is not lost when passing through the light-transmitting hole, anti-peeping is achieved without changing the brightness.

[0069] like Figure 5 The figure shows that the light emitted by the light-emitting unit 111 is converged by the first focusing unit 151 of the filter function layer, and then partially passes through the light-transmitting hole 152a of the filter layer 152 and is emitted after passing through the second focusing unit 153. This method can control the light emission direction of the light-emitting unit 111 through the light-transmitting hole 152a of the filter layer 152 to achieve privacy protection at a certain viewing angle, because the light is not lost when passing through the light-transmitting hole 152a, so privacy protection is achieved without changing the brightness.

[0070] In a preferred embodiment, see Figure 5a1 is a schematic cross-sectional view of the filter layer 152. The filter layer 152 includes a light-transmitting hole 152a and a light-shielding unit 152b. The light-transmitting hole 152a is a through hole, and its cross-sectional shape is rectangular along the cross section perpendicular to the plane where the filter layer is located. The light-shielding unit is made of light-shielding glue (such as BM glue). Figure 5a Variations of the embodiments, such as Figure 5b As shown, the filter layer 1152 includes a light-transmitting hole 1152a and a light-shielding unit 1152b. The light-transmitting hole 1152a is a through hole. Its cross-sectional shape along the cross-section perpendicular to the plane where the filter layer is located is trumpet-shaped or at least partially trumpet-shaped, and its outer edge corresponds to the maximum visible angle.

[0071] The first focusing unit and the second focusing unit can be formed by nano-imprinting, such as applying a layer of organic solvent on the surface of the substrate and letting it stand until the organic solvent has a certain fluidity, applying pressure to the template to make it contact with the surface of the substrate, allowing the organic solvent to fill the gaps in the template (i.e., imprinting), and then maintaining the stability between the template and the substrate. The photoresist is photochemically reacted to solidify by ultraviolet exposure or heating, and the demolding operation is performed after solidification. At this time, the pattern on the template will be completely copied to the organic solvent, and finally the pattern is transferred using an etching process to obtain a microlens array.

[0072] The first focusing unit and the second focusing unit can be manufactured by yellow light process. The filter layer is made by curing BM glue, and its light transmittance is less than 1%.

[0073] In a preferred embodiment, the filter function layer 150 can be attached to the display substrate (light-emitting function layer 140) by attaching equipment. In this way, it can be attached to the display substrate as a decoration, without being made on OLED, without using low-temperature processes, and without losing display brightness. Preferably, an encapsulation layer (also called thin film encapsulation layer, TFE, Thin Film Encapsulation) is stacked on the light-emitting function layer 140, and the encapsulation layer is arranged between the light-emitting function layer 140 and the first focusing structure film layer 151.

[0074] In a preferred embodiment, the filter function layer 150 can be directly disposed on the display substrate, such as making a first focusing structure film layer on the display substrate, the first focusing units therein are matched one by one with the light-emitting units in the light-emitting function layer on the lower side thereof, preparing a filter layer on the first focusing structure film layer (or coating the first focusing structure film layer with an organic glue (such as a transparent organic glue) to form an organic glue layer, preparing a filter layer on the mechanical glue layer, and adjusting the filter layer to be located at the focus of the first focusing unit by the thickness of the mechanical glue layer), the filter layer is located at the focus of the first focusing unit, and a light-transmitting hole is opened on the filter layer, and the light-transmitting hole matches the focus corresponding to the preset visual angle range. The light-transmitting hole is in the shape of a straight cylinder or at least partially in the shape of a trumpet. A second focusing structure film layer is prepared on the side of the filter layer away from the first focusing structure film layer, or an organic glue (such as a transparent organic glue) is coated on the side away from the first focusing structure film layer to form an organic glue layer, and a second focusing structure film layer is prepared on the organic glue layer, and the filter layer is adjusted to be located at the focus of the second focusing unit by the thickness of the organic glue layer. The first focusing units are matched one-to-one with the corresponding second focusing units.

[0075] As a variation of the above embodiment, the filter layer may be an electrochromic layer, see Figure 6 , the electrochromic layer 252 may include a stacked first electrode layer 252a, a color-changing layer 252b and a second electrode layer 252c, the first electrode layer 252a and the second electrode layer 252c are electrically connected to the driving layer (driving circuit) through leads (not shown), and the color-changing layer changes color to filter light, and the filter layer forms a light-transmitting hole and a shielding unit in a specific area by changing color (dynamic anti-peeping can be achieved, based on the driving mode, it can be anti-peeping, that is, enter the anti-peeping mode, or it can be non-peeping, that is, the sharing mode). The first electrode layer 252a is provided with a first electrode, which can be made of a transparent material (such as ITO). The second electrode layer 252c is provided with a second electrode, which can be made of a transparent material (such as ITO). At this time, the light passes through the light-transmitting hole formed by the color change, and the light is slightly attenuated, but the color-changing layer has a high light transmittance, which meets the brightness requirements in the anti-peeping mode. Preferably, the filter layer is an electrochromic layer, which includes a plurality of light-transmitting holes, which are through holes. The filter layer forms a shielding unit between the light-transmitting holes by changing color. At this time, light passes through the light-transmitting holes without attenuation, and the display brightness is not reduced in the anti-peeping mode.

[0076] The color-changing layer 252b is located at the focal point of the first focusing unit and at the focal point of the second focusing unit. Preferably, the color-changing layer 252b has a light-transmitting hole (preferably, matching light-transmitting holes are provided at the corresponding light-transmitting holes of the first electrode layer 252a and the second electrode layer 252c). The color-changing layer has a certain impedance, and a color-changing material is mixed therein. After the color-changing layer is energized and heated, the color-changing material changes color, such as turning black to filter light (such as anti-peeping mode). In normal conditions, the color-changing layer can be transparent (such as sharing mode). In anti-peeping mode, the light transmittance of the filter layer is less than 1%; preferably, the light transmittance of the filter layer is less than 0.1%, and preferably, the light transmittance of the filter layer is less than 0.01%.

[0077] In one embodiment, the filter hole can also be adjusted by an electrochromic material so that when it passes low frequency, it is in an anti-peeping mode (such as light can only pass through the light-transmitting hole), and when it passes full frequency, it is in a sharing mode to improve the user experience. In one embodiment, the electrochromic layer can be patterned, such as by etching to obtain a pattern. The material of the electrochromic color-changing layer can be selected from at least one of tungsten oxide (WO3), polyaniline (PANI), viologen, fluoran, triphenylamine, anthraquinone, carbazole and its derivatives, or a combination thereof.

[0078] Based on the same inventive concept, the embodiment of the present application also provides a display device, which includes the display panel provided in the embodiment of the present application. The display device can be used in smart devices or in smart cars as an in-vehicle display (which can suppress light pollution while meeting the anti-peeping requirement to prevent the driver from being distracted).

[0079] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting functional layer, wherein the light-emitting functional layer is disposed on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting units; and A light filtering functional layer, the light filtering functional layer is arranged on a side of the light emitting functional layer away from the substrate, and the light filtering functional layer comprises a first focusing structure film layer and a light filtering layer which are sequentially stacked in a direction away from the substrate; The first focusing structure film layer includes a plurality of first focusing units, the filter layer includes a plurality of light-transmitting holes, the first focusing units match the corresponding light-transmitting holes, the focus of the first focusing units is located in the corresponding light-transmitting holes, and the light emitted by the light-emitting unit is partially passed through the light-transmitting holes after being converged by the first focusing units.

2. The display panel according to claim 1, wherein: The filter function layer further comprises a second focusing structure film layer located at a side of the filter layer away from the first focusing structure film layer, the second focusing structure film layer comprises a plurality of second focusing units, and the second focusing units correspond to the first focusing units one by one; Preferably, the light emitted by the light emitting unit is converged by the first focusing unit and then partially passes through the light-transmitting hole and then is emitted through the matching second focusing unit; Preferably, the distance between the filter layer and the first focusing unit is equal to the focal length of the first focusing unit, and / or the distance between the filter layer and the second focusing unit is equal to the focal length of the second focusing unit; Preferably, the focal length of the first focusing unit is the same as the focal length of the second focusing unit; Preferably, the first focusing unit and the second focusing unit are respectively convex lens-shaped or have elliptical cross-sections along their optical axes.

3. The display panel according to claim 1, wherein: The first focusing units are matched one by one with the corresponding light emitting units; Preferably, the first focusing unit matches the combination of periodic light-emitting units one by one.

4. The display panel according to claim 1, wherein: In a cross section perpendicular to the plane where the filter layer is located, the cross section of the light-transmitting hole is rectangular; Preferably, along a cross section perpendicular to the plane where the filter layer is located, the cross section of the light-transmitting hole is in a trumpet shape.

5. The display panel according to claim 1, wherein: The filter layer further comprises a plurality of light shielding units located between the light transmission holes, and the light transmission holes are through holes; Preferably, the material of the shading unit includes shading glue; Preferably, the light transmittance of the shading unit is less than 1%; Preferably, the light transmittance of the shading unit is lower than 0.1%; Preferably, the light transmittance of the shading unit is lower than 0.01%.

6. The display panel according to claim 1, wherein: It also includes an encapsulation layer, which is arranged between the light-emitting functional layer and the first focusing structure film layer.

7. The display panel according to claim 1, wherein: The filter function layer further includes an organic glue layer, and the organic glue layer includes a first organic glue layer disposed between the first focusing structure film layer and the filter layer and / or a second organic glue layer disposed between the second focusing structure film layer and the filter layer; Preferably, the organic glue layer comprises transparent organic glue.

8. The display panel according to claim 1, wherein: The filter layer is an electrochromic layer, and the filter layer forms the light-transmitting holes and the shielding units in specific areas by changing color; Alternatively, the filter layer is an electrochromic layer, the filter layer comprises a plurality of light-transmitting holes, the light-transmitting holes are through holes, and the filter layer forms a shielding unit between the light-transmitting holes by changing color; Preferably, the electrochromic layer comprises a first electrode layer, a color-changing layer and a second electrode layer which are sequentially stacked in a direction away from the substrate; Preferably, the first electrode layer includes a first electrode, the second electrode layer includes a second electrode, and the first electrode and the second electrode are electrically connected to the driving layer respectively; Preferably, the first electrode and the second electrode are respectively made of indium tin oxide.

9. The display panel according to claim 8, wherein: The material of the color-changing layer is selected from at least one of tungsten oxide, polyaniline, viologen, fluoran, triphenylamine, anthraquinone, carbazole and derivatives thereof, or a combination thereof.

10. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 9.

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