Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a substrate, a pixel definition layer, a plurality of light emitting units, a suspension structure, a peep-proof light source, a shading layer and a packaging layer, the pixel definition layer is arranged on the substrate, and a plurality of opening areas are formed; the plurality of light-emitting units are arranged on the substrate base plate and located in the opening area; the overhanging structure is arranged on the pixel definition layer, is located in a non-opening area and is used for separating two adjacent light-emitting units; the peep-proof light source is arranged on the overhanging structure and located in the non-opening area. The light shielding layer is arranged on the peep-proof light source, is positioned in the non-opening area and is used for shielding vertical emergent light rays of the peep-proof light source; and the packaging layer is arranged on the light shielding layer and is used for sealing the light emitting unit. Switching between the peep-proof function and the normal display function of the display panel is achieved by controlling the switch of the peep-proof light source.

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] At present, OLED organic light-emitting display technology is gradually maturing, and as a self-luminous display technology, it is used in more and more products. As people in modern society pay more attention to their own privacy, the anti-peeping function of the display panel has also become a necessary function of the product. Therefore, OLED anti-peeping technology is also a hot topic of discussion recently.

[0003] Traditional anti-peeping displays are to attach an anti-peeping film to the surface of the display panel. The anti-peeping film generally uses ultra-fine blinds technology, and the principle is similar to that of vertical blinds. The display that limits the light from the display panel to exit from a fixed angle is the simplest and most direct solution, with a higher yield and the widest application. However, the anti-peeping angle and degree of the general anti-peeping film are limited and cannot be adjusted variably. At the same time, the anti-peeping film will also cause a great loss of light efficiency and an increase in power consumption. Therefore, in the technology of adding anti-peeping function to the display panel, how to avoid losing light efficiency and not affecting the organic light-emitting layer becomes the key to this technology. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device, which can realize the switching between the anti-peeping function and the normal display function of the display panel by controlling the switch of the anti-peeping light source.

[0005] The present application discloses a display panel, which includes a base substrate, a pixel definition layer, a plurality of light-emitting units, a suspension structure, an anti-peeping light source, a shading layer and an encapsulation layer, wherein the pixel definition layer is arranged on the base substrate to form a plurality of opening areas; a plurality of the light-emitting units are arranged on the base substrate and are located in the opening areas; the suspension structure is arranged on the pixel definition layer and is located in a non-opening area to separate two adjacent light-emitting units; the anti-peeping light source is arranged on the suspension structure and is located in the non-opening area; the shading layer is arranged on the anti-peeping light source and is located in the non-opening area to block the vertically emitted light of the anti-peeping light source; the encapsulation layer is arranged on the shading layer to seal the light-emitting units.

[0006] Optionally, the anti-peeping light source is formed of a lanthanide metal-organic framework material, and is used to generate visible light under the excitation of non-visible light, and the visible light includes one or more of blue light, green light or red light; the display panel also includes a non-visible light emitter, and the non-visible light emitter is used to emit the non-visible light toward the anti-peeping light source.

[0007] Optionally, the overhang structure includes a conductive part and a overhang part, the overhang part is arranged on the conductive part, the overhang part includes an upper part and a lower part, the radial width of the lower part is smaller than the radial width of the upper part; the conductive part is provided with a through groove, and on the orthographic projection of the base substrate, the through groove overlaps with the anti-peeping light source.

[0008] Optionally, the upper portion is provided with a plurality of grooves, and the anti-peeping light sources are respectively arranged in the grooves.

[0009] Optionally, the upper portion is formed of the lanthanide metal-organic framework material to serve as the anti-peeping light source.

[0010] Optionally, the upper part and the lower part are respectively formed of the lanthanide metal organic framework material to serve as the anti-peeping light source; and the angle formed by the bottom surface of the upper part and the side surface of the lower part is 40 degrees to 80 degrees.

[0011] Optionally, at the position of the through groove, the upper part or the lower part is formed by the lanthanide metal organic framework material to serve as the anti-peeping light source.

[0012] Optionally, at the position of the through groove, a convex surface is provided on a side of the pixel definition layer close to the overhanging structure, and the convex surface is used to radiate the non-visible light to the anti-peeping light source.

[0013] Optionally, the anti-peeping light source includes at least a first anti-peeping part and a second anti-peeping part, and the non-visible light emitter includes at least a first excitation layer and a second excitation layer, the first anti-peeping part is used to emit a first anti-peeping light under the control of the first excitation layer, and the second anti-peeping part is used to emit a second anti-peeping light under the control of the second excitation layer, and the non-visible light wavelength ranges of the first excitation layer and the second excitation layer are different; wherein the intensity of the first anti-peeping light is less than the intensity of the second anti-peeping light.

[0014] The present application discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application forms an anti-peeping light source by setting an anti-peeping light source on the overhanging structure in the non-opening area, and utilizing the position of the overhanging structure in the non-opening area. When the anti-peeping light source emits light, the outgoing light perpendicular to the substrate will be blocked by the shading layer to prevent this part of the light from affecting the normal display. However, there is a part of the light with an angle or a large angle, which is emitted from the opening area. When the display panel is viewed from the side, due to the large-angle light of the anti-peeping light source, the brightness at a large angle is enhanced, and the grayscale becomes larger, so that at a large viewing angle or a side viewing angle, the grayscale is not accurate or there are multiple sub-pixels mixed to cause a halo, thereby displaying a different color, making it impossible to see the real picture clearly, and realizing anti-peeping at a large viewing angle or a side viewing angle. When the anti-peeping light source is turned on, due to the effect of the shading layer, the display picture is viewed without loss at a straight viewing angle. Then, by controlling the switch of the anti-peeping light source, the anti-peeping function and the normal display function of the display panel are switched. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application; Figure 2 is a schematic top view of the overhang structure of the first embodiment of the present application; Figure 3 is a schematic diagram of another display panel of the first embodiment of the present application; Figure 4 is a schematic diagram of a display panel according to a second embodiment of the present application; Figure 5 is a schematic top view of a display panel according to a second embodiment of the present application; Figure 6 is a schematic diagram of a display panel according to a third embodiment of the present application; Figure 7 is a schematic diagram of a display panel according to a fourth embodiment of the present application; Figure 8 is a schematic diagram of another display panel according to the fourth embodiment of the present application; Fig. 9 is a schematic diagram of a display device of the present application.

[0017] Among them, 100, display panel; 101, opening area; 102, non-opening area; 110, substrate; 111, pixel definition layer; 112, convex surface; 113, encapsulation layer; 120, light emitting unit; 120R, red light emitting unit; 120G, green light emitting unit; 120B, blue light emitting unit; 130, anti-peeping light source; 131, first color anti-peeping part; 132, second color anti-peeping part; 133, third color anti-peeping part; 134, non-visible light emitter; 1 34a, first excitation layer; 134b, second excitation layer; 135, first peeping protection part; 136, second peeping protection part; 140, light shielding layer; 150, color filter layer; 151R, red filter part; 151G, green filter part; 151B, blue filter part; 160, overhang structure; 161, conductive part; 162, overhang part; 1621, upper part; 1621a, groove; 1622, lower part; 163, through groove; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0018] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0019] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0020] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0021] Figure 1 is a schematic diagram of a display panel 100 according to a first embodiment of the present application, Figure 2 is a top view schematic diagram of the overhang structure 160 of the first embodiment of the present application, see Figure 1 to Figure 2As shown, the present application discloses a display panel 100, the display panel 100 includes a base substrate 110, a pixel definition layer 111, a plurality of light emitting units 120, a suspension structure 160, an anti-peep light source 130, a light shielding layer 140 and an encapsulation layer 113, the pixel definition layer 111 is arranged on the base substrate 110, and a plurality of opening areas 101 are formed; the plurality of light emitting units 120 are arranged on the base substrate 110, and are located in the opening areas 101; the suspension structure 160 0 is arranged on the pixel definition layer 111, located in the non-opening area 102, and is used to separate two adjacent light-emitting units 120; the anti-peeping light source 130 is arranged on the overhanging structure 160, and is located in the non-opening area 102; the shading layer 140 is arranged on the anti-peeping light source 130, and is located in the non-opening area 102, and is used to block the vertically emitted light of the anti-peeping light source 130; the encapsulation layer 113 is arranged on the shading layer 140, and is used to seal the light-emitting unit 120.

[0022] The present application forms the anti-peeping light source 130 by setting the anti-peeping light source 130 on the overhanging structure 160 of the non-opening area 102, and utilizing the position of the overhanging structure 160 of the non-opening area 102. When the anti-peeping light source 130 emits light, the outgoing light perpendicular to the substrate 110 will be shielded by the light shielding layer 140 to prevent the light from affecting the normal display. However, there are some light rays with angles or large angles, which are emitted from the opening area 101. When the display panel 100 is viewed from the side, due to the large-angle light of the anti-peeping light source 130, the brightness at large angles is enhanced, and the grayscale becomes larger, so that at large viewing angles or side viewing angles, the grayscale is not accurate or there are multiple sub-pixels mixed to cause halo, thereby displaying different colors, making it impossible to see the real picture clearly, and realizing anti-peeping at large viewing angles or side viewing angles. When the anti-peeping light source 130 is turned on, due to the effect of the light shielding layer 140, the display picture is viewed from the front viewing angle without loss. Furthermore, by controlling the switch of the anti-peeping light source 130 , the switch between the anti-peeping function and the normal display function of the display panel 100 is achieved.

[0023] Specifically, the overhang structure 160 is a key structure in the maskless evaporation technology. In the maskless evaporation technology, by introducing the overhang structure 160, a metal mask is no longer used in device preparation, but the overhang structure 160 is used to separate the light-emitting unit 120 devices between pixels, thereby realizing independent light-emitting units 120. Through the use of the maskless evaporation technology, the passive matrix OLED has high resolution and high color, which can better solve the problems of low cathode template resolution and low yield of the light-emitting unit 120 devices. The overhang structure 160 generally needs to have the function of separating the film layer, that is, in the process of evaporating a certain film layer of the light-emitting unit 120, the material of the light-emitting unit 120 in the opening area 101 can be separated from the material of the light-emitting unit 120 in the non-opening area 102 by the overhang structure 160, and the material of the light-emitting unit 120 in the non-opening area 102 is generally redundant material, which can be removed by a subsequent photolithography process. In this process, it is not necessary to use a metal mask, and independently separated light-emitting units 120 can be formed in multiple opening areas 101.

[0024] The anti-peeping light source 130 in the present application adopts a technology that a metal organic framework material (MOFs) emits visible light under the excitation of non-visible light. The metal organic framework material is used to emit light as the anti-peeping light source 130. The metal organic framework material is a porous material formed by self-assembly of metal ions and organic ligands. Both metal ions and organic ligands can serve as potential luminescent centers, and the pores of MOFs can also load luminescent objects. The metal organic framework material in this embodiment can emit monochromatic light or polychromatic light. Under the excitation of non-visible light, the colors of the light emitted by adding different organic ligands or metal ions are also different.

[0025] For example, lanthanide metal ions (such as Ln3+, Eu3+, Tb3+ and Dy3+) and organic ligands with non-uniformly distributed carboxyl groups (such as isophthalic acid derivatives) are first assembled into a ribbon structure through the anisotropic growth of metal ions and organic ligands, and then these nanoribbons are entangled and gelled to form MOF gel. By adjusting the type and / or ratio of Ln3+ ions, a mixed metal MOF gel with full-color emission can be prepared. The coordination center lanthanide metal ions (Eu3+, Tb3+ or Dy3+) can produce different colors of emission, thereby achieving multi-color control under the same wavelength excitation. At the same time, by changing the type and ratio of ions, the same color emission at different wavelengths can be achieved.

[0026] The metal organic framework material in this embodiment is mainly a lanthanide metal organic framework material, which has the characteristic of luminescence under non-visible light excitation, and has multiple forms of luminescence, such as simultaneous luminescence of ligands and metal ions, simultaneous luminescence of host and guest, simultaneous luminescence of mixed metals, and simultaneous luminescence of mixed MOFs. Taking the simultaneous luminescence of ligands and metal ions as an example, the lanthanide metal ions in the lanthanide organic framework material have an antenna effect, that is, the ligand absorbs energy to the excited state, passes through the gap to the triplet state, and the triplet state sensitizes the lanthanide ions to achieve antenna effect luminescence. Among them, to achieve simultaneous luminescence of ligands and metal ions, the energy transfer efficiency of ligands to europium ions can be regulated by introducing boric acid groups on terephthalic acid, and the ligands and metal ions are used to emit light simultaneously. The boric acid group has a strong affinity for fluoride ions and H2O2, and the ratio-type luminescence sensing and visual detection of fluoride ions and H2O2 are achieved. Different from regulating energy transfer, the aggregation-induced emission ligands and lanthanide ions are used to prepare MOFs, and the luminescence is enhanced by limiting the intramolecular rotation of the ligands by coordination, and the luminescence is combined with the antenna effect of the europium ions to achieve simultaneous enhancement of the luminescence of the ligands and europium ions. For example, by adjusting the ratio of lanthanide ions and ligands, taking Ln-MOF[TbxEu1-x (TCBA)(H2O)]2·DMF as an example, the characteristic of Eu (III) is to emit red light, the characteristic of Tb (III) is to emit green light, and the characteristic of Gd (III) is to emit blue light. The ratio of Eu (III) and Tb (III) and Gd (III) can be adjusted to change the luminescence color, that is, different colors of luminescent MOFs can be achieved by combining different ligands and metal ions. The ligands used in host-guest simultaneous luminescence, mixed metal simultaneous luminescence and mixed MOFs are generally different from metal ions. For host-guest simultaneous luminescence, Ru@MIL-NH2 material is taken as an example. Ru(bpy) 32+ has red fluorescence and MIL-NH2 has blue fluorescence, which realizes blue-red host-guest luminescence under a single excitation of 300nm. Mixed metal simultaneous luminescence can be easily prepared by using Ln3+ ions with similar atomic radius and coordination mode, and by adjusting the ratio of Ln3+ ions. The red, green and blue luminescence of Eu3+, Tb3+ and Dy3+ are used. Mixed MOFs simultaneous luminescence uses Eu3+ and Tb3+ as metal nodes, and reacts with 2,5-dicarboxylic acid phenylboronic acid to prepare red light Eu-MOFs and green light Tb-MOFs respectively, and prepares three primary colors MOFs ink together with blue light UiO-66-NH2.

[0027] In addition to the four luminescence paradigms mentioned above for realizing multi-luminescent lanthanide metal organic framework materials, mixed ligands as luminescence centers and single ligands with multi-luminescence can also be used to prepare multi-luminescent MOFs. Among them, by adjusting the ratio of Eu (III) and Tb (III), Gd (III), or the ratio of Eu3+, Tb3+ and Dy3+, etc., the wavelength of non-visible light can be selected between 250nm and 350nm, so that lanthanide metal organic framework materials of different materials have different luminescence colors. In this embodiment, the lanthanide metal organic framework material is mainly used to emit monochromatic light such as red, green or blue under different material ratios, so as to realize red light anti-peeping, green light anti-peeping and blue light anti-peeping.

[0028] Specifically, the display panel 100 of the present application also includes a non-visible light emitter 134, which is used to emit non-visible light toward the anti-peeping light source 130. In this embodiment, the non-visible light emitter 134 can be located on the back of the substrate 110 or between the pixel definition layer 111 and the substrate 110. The non-visible light emitter 134 is controlled by an electrical signal to work. Since the anti-peeping light source 130 is working, it is not necessary to control the brightness of the anti-peeping light source 130, and it is not necessary to control each anti-peeping light source 130 separately. It is only necessary to control the anti-peeping light source 130 to generate different colors of light such as red, green or blue when anti-peeping is required, so that the emitted light under a large viewing angle is mixed, resulting in inability to see clearly. Moreover, in the OLED display panel 100, the light-emitting units 120 at different positions can all be controlled separately. Therefore, when certain pixels are not displayed, the anti-peeping light source 130 can emit light, causing the pixel to be displayed at a wide viewing angle, thereby interfering with the display content at a wide viewing angle, thereby achieving wide viewing angle anti-peeping.

[0029] The advantage of the metal organic framework material of the present application is that it does not need to provide voltage inside the display panel 100 for driving, but requires non-visible light excitation to emit light, that is, the anti-peeping light source 130 is set in the non-opening area 102, for example, it is easy to implement on the pixel definition layer 111 or other positions, and a small space can be occupied to set the anti-peeping light source 130. Compared with the solution in the exemplary technology that improves the non-opening area 102 and occupies the area of ​​a sub-pixel to synchronously set the anti-peeping light source 130, it does not need to occupy too much area, and there is no need to improve the non-opening position in the pixel. Due to the device area occupied by the light-emitting unit 120, when the light-emitting unit 120 is used in the non-opening area 102, the position of the opening needs to be squeezed, so that when the original three sub-pixels form one pixel, the anti-peeping sub-pixel will also occupy an area in one pixel, so that four sub-pixels need to be set, resulting in a reduction in the opening area, causing display problems.

[0030] Of course, in one embodiment, the non-visible light emitter 134 can be set in different areas to control the non-visible light emitters 134 in different areas to emit light, thereby realizing partitioned anti-peeping. The specific partitioning method can be designed according to actual needs, such as upper and lower partitions, left and right partitions, and middle partitions, etc., and the partitioned anti-peeping function can be realized by setting different areas.

[0031] In one embodiment, the overhang structure 160 includes a conductive portion 161 and a overhang portion 162, wherein the overhang portion 162 is disposed on the conductive portion 161, and the overhang portion 162 includes an upper portion 1621 and a lower portion 1622, wherein the radial width of the lower portion 1622 is smaller than the radial width of the upper portion 1621; the conductive portion 161 is provided with a through groove 163, and on the orthographic projection of the base substrate 110, the through groove 163 overlaps with the anti-peeping light source 130.

[0032] The anti-peeping light source 130 of this embodiment needs to work under the stimulation of non-visible light, and in the overhang structure 160, the conductive part 161 is generally formed of an opaque metal material, so that the non-visible light cannot pass through the conductive part 161 and enter the anti-peeping light source 130, and thus cannot stimulate the anti-peeping light source 130 to emit light normally. Therefore, in this solution, by utilizing the area where the overhang structure 160 is located, a through groove 163 is provided on the conductive part 161. Generally speaking, only the lanthanide metal organic framework material in the through groove 163 area can emit visible light, thereby forming an anti-peeping function.

[0033] Generally speaking, the lanthanide metal organic framework material can be formed on the overhang structure 160 by printing or coating. Of course, the lanthanide metal organic framework material can also be used as a part of the overhang structure 160, thereby replacing the overhang portion 162 on the overhang structure 160. This embodiment includes providing a groove 1621a on the overhang portion 162 to accommodate the anti-peeping light source 130 and replacing the overhang portion 162 with the material of the anti-peeping light source 130, but is not limited to the above method.

[0034] Specifically, the present embodiment relates to a new technology of replacing a polarizing film with a COE (Color film on Encapsulation) layer, that is, a color filter layer 150 is disposed on the encapsulation layer 113, and a plurality of color filter portions are disposed in the plurality of opening areas 101. Generally speaking, the color filter portion includes a red filter portion 151R, a green filter portion 151G and a blue filter portion 151B. Three adjacent color filter portions of different colors can form a pixel, which can be respectively referred to as a red sub-pixel, a green sub-pixel and a blue sub-pixel. By controlling the light brightness of the red filter portion 151R, the light brightness of the green filter portion 151G and the light brightness of the blue filter portion 151B, any color can be formed in one pixel, that is, by controlling the grayscale of the red sub-pixel, the grayscale of the green sub-pixel and the grayscale of the blue sub-pixel, the display of different colors can be achieved. In the organic light emitting display panel 100 , the display of different colors is mainly achieved by controlling the brightness of the light emitting unit 120 .

[0035] Specifically, the color filter layer 150 is arranged on the encapsulation layer 113, including a plurality of color filter parts, the color filter parts are located in the opening area 101, the shading layer 140 is arranged on the same layer as the color filter parts, the shading layer 140 is arranged on the anti-peeping light source 130, and is located in the non-opening area 102, for shielding the vertically emitted light of the anti-peeping light source 130.

[0036] In this embodiment, the light shielding layer 140 that shields the vertically emitted light of the anti-peeping light source 130 is arranged in the same layer as the color filter part, that is, the black matrix in the color filter layer 150 is used to achieve the light shielding effect on the anti-peeping light source 130, so as to prevent the anti-peeping light source 130 from affecting the front view. The color filter part also has the function of absorbing and filtering the ambient light. Generally speaking, the color filter part includes a red filter part 151R, a green filter part 151G and a blue filter part 151B. The red filter part 151R can absorb light of other colors and transmit red light, the green filter part 151G can absorb light of other colors and transmit green light, and the blue filter part 151B can absorb light of other colors and transmit blue light.

[0037] Specifically, the red filter portion 151R and the red light-emitting unit 120R are arranged in the same opening area 101, the green filter portion 151G and the green light-emitting unit 120G are arranged in the same opening area 101, and the blue filter portion 151B and the blue light-emitting unit 120B are arranged in the same opening area 101; at least one adjacent red light-emitting unit 120R, one green light-emitting unit 120G and one blue light-emitting unit 120B constitute a pixel, and in one pixel, at least one anti-peeping light source 130 is arranged, and the anti-peeping light source 130 is arranged between the red light-emitting unit 120R and the blue light-emitting unit 120B, between the red light-emitting unit 120R and the green light-emitting unit 120G, or between the green light-emitting unit 120G and the red light-emitting unit 120R. Specifically, in this embodiment, at least one anti-peeping light source 130 is disposed in a pixel. The anti-peeping light source 130 can be used to prevent the pixel from having abnormal color mixing when displayed at a wide viewing angle, resulting in an effect that the pixel cannot be viewed clearly at a wide angle.

[0038] In this embodiment, due to the monochromatic filtering effect of the color filter, when the anti-peeping light source 130 is monochromatic light, although it can match the color filter of the same color, it cannot pass through the adjacent color filter of other colors. For example, when the anti-peeping light source 130 is red light, the red light can pass through the red filter 151R, while the red light at the position of the green filter 151G and the blue filter 151B will be absorbed and cannot be emitted. At this time, at a large angle, there will be abnormal brightness of the red sub-pixel, resulting in the inability to see the displayed content clearly at a large viewing angle or a side viewing angle, thereby achieving anti-peeping.

[0039] However, relatively speaking, since the red emitted light will be absorbed by the green filter 151G and the blue filter 151B, the light utilization rate of the anti-peeping light source 130 is low, resulting in higher power consumption for better anti-peeping effect. Therefore, the anti-peeping light source 130 can also adopt a dual-color or multi-color light emission mode. The visible light emitted by the anti-peeping light source 130 includes two or more of blue light, green light or red light.

[0040] Continue to see Figure 1As shown, in the present embodiment, the anti-peeping light source 130 adopts a two-color light emitting mode, and the anti-peeping light source 130 can be divided into a first color anti-peeping portion 131, a second color anti-peeping portion 132 and a third color anti-peeping portion 133, that is, the anti-peeping light source 130 includes a first color anti-peeping portion 131, a second color anti-peeping portion 132 and a third color anti-peeping portion 133, the first color anti-peeping portion 131 is arranged between the red light emitting unit 120R and the green light emitting unit 120G, the second color anti-peeping portion 132 is arranged between the red light emitting unit 120R and the blue light emitting unit 120B, and the third color anti-peeping portion 133 is arranged between the green light emitting unit 120G and the blue light emitting unit 120B; wherein, the first color anti-peeping portion 131 is used to emit red light and green light under non-visible light excitation, the second color anti-peeping portion 132 is used to emit red light and blue light under non-visible light excitation, and the third color anti-peeping portion 133 is used to emit green light and blue light under non-visible light excitation.

[0041] In this embodiment, the anti-peeping light source 130 can be controlled to emit two-color light, so that the emitted light of the anti-peeping light source 130 disposed between the two color filter parts can be emitted from between the two color filter parts. In this way, the emitted light of the anti-peeping light source 130 is fully utilized for anti-peeping, and the anti-peeping light source 130 can only emit two-color light without interference from other color lights. Moreover, it is important that the display panel 100 has an anti-peeping function at four side viewing angles of left, right, top and bottom, while a single-color anti-peeping light source 130 is prone to being able to prevent peeping at one side viewing angle, but there is a risk of being unable to prevent peeping at other sides.

[0042] Of course, in this embodiment, the ligands and metal ions of the lanthanide metal organic framework material can also be controlled to control the anti-peeping light source 130 to emit red, green and blue light. When displaying, the light emitting units 120 of different colors and the color filter parts can be superimposed to obtain display lights of various colors. Similarly, the anti-peeping light sources 130 of different colors can be superimposed to obtain anti-peeping lights of various colors to achieve a better anti-peeping effect. It can be understood that since the light emitting units 120 of the OLED display panel 100 can all be controlled individually, when some pixel positions are not displayed, the first color anti-peeping part 131, the second color anti-peeping part 132 and the third color anti-peeping part 133 are operated at this time, so that the pixels that are not displayed at a large viewing angle are also displayed, thereby further making the display content at a large viewing angle impossible to see clearly.

[0043] It is worth mentioning that the solution of the present application can also be used for OLED display panels without COE technology. The corresponding shading layer cannot utilize the black matrix in the color filter layer, but needs to form an additional shading layer on the anti-peeping light source to block the vertical outgoing light of the anti-peeping light source.

[0044] Figure 3 is a schematic diagram of another display panel 100 of the first embodiment of the present application, see Figure 3 As shown, Figure 3 is along Figure 2 The cross-sectional view of the cutting line AA shows that, in this embodiment, the anti-peeping light source 130 can be accommodated by providing a groove 1621 a on the overhanging portion 162 of the overhanging structure 160 .

[0045] Specifically, the upper portion 1621 is provided with a plurality of grooves 1621a, and the anti-peeping light sources 130 are respectively arranged in the grooves 1621a, and the grooves 1621a correspond to the positions of the through grooves 163, so that the anti-peeping light sources 130 can receive the non-visible light passing through the through grooves 163. In order to form the grooves 1621a, it is necessary to adopt a half-mask technique when forming the upper portion 1621 of the overhang portion 162, so as to form the grooves 1621a for accommodating the anti-peeping light sources 130.

[0046] In this embodiment, the anti-peeping light source 130 is accommodated by providing a groove 1621a in the upper part 1621 of the overhang 162, so that the non-opening area 102 has the ability to emit light at a large angle. In addition, there is no influence between the lanthanide metal organic framework material and the upper part 1621 material. By providing the anti-peeping light source 130 in the groove 1621a of the upper part 1621, the anti-peeping light source 130 is sealed in the groove 1621a by using the encapsulation layer 113 in the subsequent encapsulation process. Of course, considering that when the upper part 1621 of the overhang 162 is formed by an inorganic insulating material, its thickness is relatively thin. In this case, the anti-peeping light source 130 can be directly provided on the upper part 1621 of the overhang 162, and the encapsulation layer 113 covers the anti-peeping light source 130 through subsequent encapsulation.

[0047] It is understandable that, in the case where the conductive portion 161 forms a through groove 163, since the through groove 163 needs to be filled by the overhanging portion 162, a groove 1621a will be formed in the upper portion 1621, and the groove 1621a can be used to accommodate the anti-peeping light source 130. A light shielding layer 140 is generally provided in the non-opening area 102 of the display panel 100, and the function of the light shielding layer 140 is mainly to prevent the external light from entering and causing reflection and other problems. In this embodiment, a light shielding layer 140 is provided above the anti-peeping light source 130, and there is a certain gap between the light shielding layer 140 and the anti-peeping light source 130, so that the vertically emitted light of the anti-peeping light source 130 is blocked by the light shielding layer 140, and the obliquely emitted light can be emitted from the adjacent opening area 101, thereby forming anti-peeping, and it is also provided in the light shielding layer 140 in the subsequent embodiments, which will not be repeated here.

[0048] Figure 4 is a schematic diagram of a display panel 100 according to a second embodiment of the present application, see Figure 4 As shown, in this embodiment, the upper portion 1621 of the overhang 162 is formed by replacing the material of the upper portion 1621 with a lanthanide metal organic framework material.

[0049] Specifically, the upper portion 1621 is formed of a lanthanide metal organic framework material to serve as the anti-peeping light source 130 .

[0050] In this embodiment, when forming the overhang structure 160 of the display panel 100, the conductive portion 161 of the overhang structure 160 is first formed, the through groove 163 is formed in the conductive portion 161, the lower portion 1622 of the overhang 162 is formed, and finally the upper portion 1621 of the overhang 162 is formed using a lanthanide metal organic framework material. After the upper portion 1621 pattern of the metal organic framework material is formed, the lower portion 1622 is etched using the upper photoresist protection layer, and the material of the lower portion 1622 of the overhang 162 is generally formed using an insulating material, thereby forming an overhang 162 in which the radial width of the upper portion 1621 is greater than the radial width of the lower portion 1622.

[0051] Since the overhang structure 160 is a mesh structure that is crisscrossed horizontally and vertically on the projection of the base substrate 110, each opening area 101 corresponds to a mesh hole in the mesh structure, that is, the overhang structure 160 is arranged around each light-emitting unit 120, and the overhang structure 160 is arranged around each light-emitting unit 120, and the overhang structure 160 is shared by two adjacent light-emitting units 120.

[0052] Figure 5 is a schematic top view of a display panel 100 according to a second embodiment of the present application, see Figure 5As shown, by replacing the upper portion 1621 of the overhang 162 with the material of the anti-peeping light source 130, during the formation process, the lanthanide metal organic framework material can be formed into a mesh upper portion 1621 by printing or coating. Compared with the anti-peeping light source 130 formed at the position of multiple through grooves 163 in the previous embodiment, the complexity of the process is reduced, and the characteristics of the metal organic framework material can also serve as the upper portion 1621 of the overhang 162, realizing the function of the overhang structure 160 to block the light-emitting unit 120. In this embodiment, the upper portion 1621 of the overhang 162 can be completely replaced with the lanthanide metal organic framework material, and the metal organic framework material at the position of the through groove 163 area can emit light under the excitation of non-visible light, In one embodiment, considering that the overhanging structure 160 needs to separate the adjacent light-emitting units 120 during the manufacturing process of the light-emitting unit 120, and when evaporating the various film layers in the light-emitting unit 120, it is necessary to emit various material particles from the evaporation source, in order to prevent the various material particles from entering the porous gaps of the lanthanide metal-organic framework material. The porous gap width of the lanthanide metal-organic framework material can be set to be smaller than the width of the particles emitted by the evaporation source. Of course, a protective layer can also be provided on the lanthanide metal-organic framework material to prevent the particles emitted by the evaporation source from entering the porous structure of the lanthanide metal-organic framework material.

[0053] Figure 6 is a schematic diagram of a display panel 100 according to a third embodiment of the present application, see Figure 6 As shown, in this embodiment, the overhang 162 can also be formed by using a lanthanide metal organic framework material by replacing the material of the overhang 162 .

[0054] Specifically, the upper portion 1621 and the lower portion 1622 are respectively formed of lanthanide metal organic framework materials to serve as the anti-peeping light source 130 .

[0055] In this embodiment, the upper portion 1621 and the lower portion 1622 of the overhang portion 162 are replaced by lanthanide metal organic framework materials, and no longer formed by insulating materials. The advantage is that the lanthanide metal organic framework material can be directly formed by coating and printing, without the need for deposition etching and other methods to directly form the overhang portion 162 on the conductive portion 161.

[0056] Specifically, the angle formed by the bottom surface of the upper portion 1621 and the side surface of the lower portion 1622 is between 40 degrees and 80 degrees.

[0057] In this embodiment, since the metal organic framework material has better strength and toughness, when forming the overhang 162, the angle between the bottom surface of the upper part 1621 and the side surface of the lower part 1622 can be made larger. In the above embodiment, for the overhang 162 formed by an insulating material such as an inorganic insulating material, due to the strength and toughness limitations of the inorganic insulating material, the angle between the bottom surface of the upper part 1621 and the side surface of the lower part 1622 is a maximum of 60 degrees, generally between 45 degrees and 60 degrees. By using a metal organic framework material, the angle between the bottom surface of the upper part 1621 and the side surface of the lower part 1622 can be up to 80 degrees. Considering that the larger the angle, the smaller the space occupied by the overhang structure 160 itself, and the better the partition effect on the light-emitting unit 120, the area of ​​the opening area 101 can also be increased by reducing the size of the overhang structure 160 itself.

[0058] Of course, in another embodiment, an anti-peeping light source 130 may be further arranged at the position of the upper portion 1621 and the lower portion 1622 of the overhang portion 162 corresponding to the through groove 163. This method may not completely replace the upper portion 1621 and the lower portion 1622 formed by the insulating material, but only replace the upper portion 1621 and the lower portion 1622 formed by the insulating material in the through groove 163 area.

[0059] Figure 7 is a schematic diagram of a display panel 100 according to a fourth embodiment of the present application, see Figure 7 As shown, at the position of the through groove 163 , a convex surface 112 is provided on one side of the pixel definition layer close to the overhang structure 160 , and the convex surface 112 is used to radiate the non-visible light to the anti-peeping light source 130 .

[0060] The main function of the convex surface 112 is to diverge the invisible light. Since the conductive part 161 of the overhanging structure 160 is also a mesh structure, the conductive part 161 between adjacent light-emitting units 120 needs to conduct electricity continuously. Therefore, when the through groove 163 is provided, the conductive part 161 cannot be isolated. The width of the through groove 163 provided on the conductive part 161 is relatively small, that is, the conductive part 161 is wrapped around the through groove 163, thereby realizing the connection of the conductive part 161. Therefore, in this embodiment, the invisible light is diverged by the convex surface 112 and then emitted to the anti-peeping light source 130 on the overhanging part 162, so that the anti-peeping light source 130 with a larger area emits light, thereby improving the anti-peeping effect.

[0061] The convex surface 112 can be mainly formed by adjusting the etching pattern so that the pixel definition layer 111 has a certain arc surface and bulges toward the overhang structure 160 , thereby playing the role of diverging and homogenizing the invisible light.

[0062] Figure 8is a schematic diagram of another display panel 100 of the fourth embodiment of the present application, see Figure 8 As shown, specifically, the anti-peeping light source 130 includes at least a first anti-peeping part 135 and a second anti-peeping part 136, and the non-visible light emitter 134 includes at least a first excitation layer 134a and a second excitation layer 134b, the first anti-peeping part 135 is used to emit a first anti-peeping light under the control of the first excitation layer 134a, and the second anti-peeping part 136 is used to emit a second anti-peeping light under the control of the second excitation layer 134b, and the first excitation layer 134a and the second excitation layer 134b have different non-visible light wavelength ranges.

[0063] The intensity of the first anti-peeping light is less than the intensity of the second anti-peeping light. The present application is adapted to different modes of anti-peeping, for example, when displaying at low brightness, the first anti-peeping light is used for anti-peeping, and when displaying at high brightness, the second anti-peeping light is used for anti-peeping.

[0064] In this embodiment, two anti-peeping parts are used as an example for explanation. In practice, it is not limited to two anti-peeping parts, and it is also necessary to design according to the actual situation. In this scheme, it is mainly considered that under high-brightness display and low-brightness display, if the brightness of the anti-peeping light of the two displays is the same, display problems such as light leakage will occur, especially under low-brightness display, and when the brightness of the anti-peeping light source 130 is large, light leakage problems are prone to occur. When the brightness of the anti-peeping light source 130 is small during high-brightness display, it is easy to fail to achieve the anti-peeping effect. Therefore, in this embodiment, it is necessary to distinguish the anti-peeping of the side viewing angle of high-brightness display and low-brightness display. For example, under high-brightness display, the brightness of the anti-peeping light is larger, and under low-brightness display, the anti-peeping brightness is smaller, so as to achieve a better anti-peeping effect.

[0065] Specifically, in this embodiment, the wavelengths emitted by the first excitation layer 134a and the second excitation layer 134b are different, so that the first peep-proof part 135 and the second peep-proof part 136 can be controlled separately to work separately or simultaneously, so as to achieve at least two steps of peep-proof brightness when the first peep-proof part 135, the second peep-proof part 136 and both work simultaneously. Of course, more step brightness compensation can also be achieved by continuing to increase the number of peep-proof parts. For example, the brightness range of the display panel 100 is divided into a first brightness range and a second brightness range, or more. The first brightness range is a low brightness display range, and the second brightness range is a high brightness display range.

[0066] In one embodiment, the brightness of the first peep-proof portion 135 and the second peep-proof portion 136 can be the same or different. When the brightness of the first peep-proof portion 135 and the second peep-proof portion 136 are the same, it is necessary to control the first peep-proof portion 135 and the second peep-proof portion 136 to be turned on simultaneously or individually to achieve different compensation brightness. When the brightness of the first peep-proof portion 135 and the second peep-proof portion 136 are set to be different, the first peep-proof portion 135 or the second peep-proof portion 136 can be controlled to be turned on or off individually to achieve multi-step brightness adaptation of the display panel 100 for peep-proofing.

[0067] In another embodiment, the second peep-proof portion 136 is arranged around the first peep-proof portion 135, and the first peep-proof portion 135 and the second peep-proof portion 136 are arranged in the same layer. The above-mentioned peep-proof light source 130 is located in a through groove 163. In this embodiment, since the second peep-proof portion 136 and the first peep-proof portion 135 are arranged in different positions, the wide viewing angles of the two are also different. The second peep-proof portion 136 arranged on the outside is arranged at a position close to the opening area 101, and the output angle deviation is smaller than that of the first peep-proof portion 135, that is, the side view peep-proof angle of the first peep-proof portion 135 is larger, so that the user can also see the peep-proof output light from the first peep-proof portion 135 at a larger side view angle, achieving a larger angle of peep-proof.

[0068] Fig. 9 is a schematic diagram of the display device of the present application, see Fig. 9 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and the display panel 100 in any of the above embodiments, and the driving circuit 210 is used to drive the display panel 100 to display.

[0069] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0070] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel definition layer is disposed on the base substrate and forms a plurality of opening areas; A plurality of light emitting units are arranged on the base substrate and located in the opening area; A suspension structure, arranged on the pixel definition layer, located in the non-opening area, and used to separate two adjacent light-emitting units; An anti-peep light source is arranged on the overhanging structure and is located in the non-opening area; A light shielding layer, arranged on the anti-peeping light source and located in the non-opening area, for shielding the vertically emitted light of the anti-peeping light source; as well as The encapsulation layer is arranged on the light shielding layer and is used to seal the light emitting unit.

2. The display panel according to claim 1, characterized in that: The anti-peeping light source is formed of a lanthanide metal organic framework material, and is used to generate visible light under the excitation of non-visible light, and the visible light includes one or more of blue light, green light or red light; The display panel further includes a non-visible light emitter, and the non-visible light emitter is used to emit the non-visible light toward the anti-peeping light source.

3. The display panel according to claim 2, characterized in that: The overhang structure comprises a conductive portion and an overhang portion, wherein the overhang portion is arranged on the conductive portion, the overhang portion comprises an upper portion and a lower portion, and the radial width of the lower portion is smaller than the radial width of the upper portion; The conductive portion is provided with a through slot, and on the orthographic projection of the base substrate, the through slot overlaps with the anti-peeping light source.

4. The display panel according to claim 3, characterized in that: The upper portion is provided with a plurality of grooves, and the anti-peeping light sources are respectively arranged in the grooves.

5. The display panel according to claim 3, characterized in that: The upper portion is formed by using the lanthanide metal organic framework material to serve as the anti-peeping light source.

6. The display panel according to claim 3, characterized in that: The upper part and the lower part are respectively formed of the lanthanide metal organic framework material to serve as the anti-peeping light source; The angle formed by the bottom surface of the upper part and the side surface of the lower part is between 40 degrees and 80 degrees.

7. The display panel according to claim 3, characterized in that: At the position of the through groove, the upper part or the lower part is formed by the lanthanide metal organic framework material to serve as the anti-peeping light source.

8. The display panel according to claim 3, characterized in that: At the position of the through groove, a convex surface is provided on one side of the pixel definition layer close to the overhanging structure, and the convex surface is used to radiate the non-visible light to the anti-peeping light source.

9. The display panel according to claim 3, characterized in that: The anti-peeping light source comprises at least a first anti-peeping portion and a second anti-peeping portion. The non-visible light emitter comprises at least a first excitation layer and a second excitation layer, the first anti-peeping portion is used to emit a first anti-peeping light under the control of the first excitation layer, the second anti-peeping portion is used to emit a second anti-peeping light under the control of the second excitation layer, and the wavelength range of the non-visible light emitted by the first excitation layer and the second excitation layer is different; Wherein, the intensity of the first anti-peeping light is less than the intensity of the second anti-peeping light.

10. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 9, wherein the driving circuit is used to drive the display panel to display.

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