Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel includes a substrate, a pixel definition layer, a plurality of light-emitting units, a hanging structure, a privacy light source, a light-shielding layer, and a packaging layer. The pixel definition layer is disposed on the substrate and forms a plurality of opening regions; a plurality of the light-emitting units are disposed on the substrate and located in the opening regions; the hanging structure is disposed on the pixel definition layer and located in non-opening regions for separating two adjacent light-emitting units; the privacy light source is disposed on the hanging structure and located in non-opening regions; the light-shielding layer is disposed on the privacy light source and located in non-opening regions for blocking the vertically emitted light of the privacy light source; the packaging layer is disposed on the light-shielding layer for sealing the light-emitting units. The present application realizes the switching between the privacy function and the normal display function of the display panel by controlling the on / off of the privacy light source.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] Currently, the OLED organic light-emitting display technology has been gradually mature, and as a self-luminous display technology, it is more and more widely applied to products. With the increasing attention to personal privacy in modern society, the anti-peeping function of the display panel has also become an essential function of products. Therefore, the OLED anti-peeping technology has also been a hot topic of discussion recently.

[0003] Traditional anti-peeping displays are achieved by attaching an anti-peeping film to the surface of the display panel. The anti-peeping film generally adopts the ultra-fine louver technology, and its principle is similar to that of a vertical louver curtain. It has the function of restricting light from exiting the display panel at a fixed angle, which is the simplest and most direct solution with a relatively high yield and the widest application. However, generally, the anti-peeping angle and anti-peeping degree of the anti-peeping film are limited, and variable adjustment cannot be achieved. 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 an anti-peeping function to the display panel, how to achieve no loss of light efficiency and no impact on the organic light-emitting layer has become the key to this technology. Summary of the Invention

[0004] The purpose of this 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 on / off of the anti-peeping light source.

[0005] This application discloses a display panel, which includes a substrate, a pixel definition layer, a plurality of light-emitting units, a hanging structure, an anti-peeping light source, a light-shielding layer, and a packaging layer. The pixel definition layer is disposed on the substrate and forms a plurality of opening regions; a plurality of the light-emitting units are disposed on the substrate and located in the opening regions; the hanging structure is disposed on the pixel definition layer and located in the non-opening regions, and is used to separate two adjacent light-emitting units; the anti-peeping light source is disposed on the hanging structure and located in the non-opening regions; the light-shielding layer is disposed on the anti-peeping light source and located in the non-opening regions, and is used to block the vertically emitted light of the anti-peeping light source; the packaging layer is disposed on the light-shielding layer and is used to seal the light-emitting units.

[0006] Optionally, the anti-peeping light source is formed by using a lanthanide metal-organic framework material, and the anti-peeping light source is used to generate visible light under the excitation of non-visible light. 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 towards the anti-peeping light source.

[0007] Optionally, the overhanging structure includes a conductive portion and an overhanging portion. The overhanging portion is disposed on the conductive portion. The overhanging portion includes an upper portion and a lower portion, and the radial width of the lower portion is smaller than that of the upper portion. A through groove is provided in the conductive portion, and on the orthographic projection of the substrate, the through groove overlaps with the anti-peeping light source.

[0008] Optionally, a plurality of grooves are provided in the upper portion, and the anti-peeping light sources are respectively disposed 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 portion and the lower portion are respectively formed of the lanthanide metal-organic framework material to serve as the anti-peeping light source; the included angle between the bottom surface of the upper portion and the side surface of the lower portion is between 40 degrees and 80 degrees.

[0011] Optionally, at the position of the through groove, the upper portion or the lower portion is formed of 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 one side of the pixel definition layer close to the overhanging structure, and the convex surface is used to diverge the non-visible light onto the anti-peeping light source.

[0013] Optionally, the anti-peeping light source at least includes a first anti-peeping portion and a second anti-peeping portion, and the non-visible light emitter at least includes a first excitation layer and a second excitation layer. The first anti-peeping portion is used to emit first anti-peeping light under the control of the first excitation layer, and the second anti-peeping portion is used to emit second anti-peeping light under the control of the second excitation layer. 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 that of the second anti-peeping light.

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

[0015] In the present application, by arranging an anti-peeping light source on the overhanging structure in the non-opening area, the position of the overhanging structure in the non-opening area is used to form an anti-peeping light source. When the anti-peeping light source emits light, the outgoing light perpendicular to the substrate is blocked by the light-shielding layer, preventing this part of the light from affecting the normal display. There are some light rays with an angle or a large angle that exit from the opening area. When viewing the display panel from the side, due to the action of the large-angle light rays of the anti-peeping light source, the brightness increases and the gray scale becomes larger at a large angle, resulting in inaccurate gray scale or color mixing of multiple sub-pixels at a large viewing angle or a side viewing angle, leading to color difference in the display and making it impossible to clearly see the real displayed image, thus 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 light-shielding layer, there is no loss when viewing the display screen from the front view angle. Furthermore, by controlling the on / off of the anti-peeping light source, the anti-peeping function and the normal display function of the display panel are switched. Description of the Drawings

[0016] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, are used to illustrate the implementation manners of the present application, and together with the text description, explain the principles of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0017] Figure 1 is a schematic diagram of the display panel of the first embodiment of the present application;

[0018] Figure 2 is a top view schematic diagram of the overhanging structure of the first embodiment of the present application;

[0019] Figure 3 is a schematic diagram of another display panel of the first embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the display panel of the second embodiment of the present application;

[0021] Figure 5 is a top view schematic diagram of the display panel of the second embodiment of the present application;

[0022] Figure 6 is a schematic diagram of the display panel of the third embodiment of the present application;

[0023] Figure 7 is a schematic diagram of the display panel of the fourth embodiment of the present application;

[0024] Figure 8 is a schematic diagram of another display panel of the fourth embodiment of the present application;

[0025] Figure 9 It is a schematic diagram of the display device of the present application.

[0026] Among them, 100 is the display panel; 101 is the opening area; 102 is the non-opening area; 110 is the substrate; 111 is the pixel definition layer; 112 is the convex surface; 113 is the encapsulation layer; 120 is the light-emitting unit; 120R is the red light-emitting unit; 120G is the green light-emitting unit; 120B is the blue light-emitting unit; 130 is the anti-peeping light source; 131 is the first color anti-peeping part; 132 is the second color anti-peeping part; 133 is the third color anti-peeping part; 134 is the non-visible light emitter; 134a is the first excitation layer; 134b is the second excitation layer; 135 is the first anti-peeping part; 136 is the second anti-peeping part; 140 is the light-shielding layer; 150 is the color filter layer; 151R is the red filter part; 151G is the green filter part; 151B is the blue filter part; 160 is the hanging structure; 161 is the conductive part; 162 is the hanging part; 1621 is the upper part; 1621a is the groove; 1622 is the lower part; 163 is the through groove; 200 is the display device; 210 is the driving circuit. Detailed Embodiments

[0027] It should be understood that the terms, specific structures, and functional details disclosed here are only for describing specific embodiments and are representative. However, the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments described herein.

[0028] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. In addition, the terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", etc. are described based on the orientation or relative positional relationship shown in the drawings and are only for facilitating the simplified description of the present application, rather than indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to 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 specific circumstances.

[0029] The present application will be described in detail below with reference to the drawings and optional embodiments.

[0030] Figure 1 It is a schematic diagram of the display panel 100 of the first embodiment of the present application. Figure 2It is a top view schematic diagram of the overhang structure 160 of the first embodiment of the present application. Refer to Figures 1 to 2 As shown, the present application discloses a display panel 100, which includes a substrate 110, a pixel definition layer 111, a plurality of light-emitting units 120, an overhang structure 160, an anti-peeping light source 130, a light-shielding layer 140, and a packaging layer 113. The pixel definition layer 111 is disposed on the substrate 110 and forms a plurality of opening regions 101. A plurality of the light-emitting units 120 are disposed on the substrate 110 and located in the opening regions 101. The overhang structure 160 is disposed on the pixel definition layer 111 and located in the non-opening region 102 for separating two adjacent light-emitting units 120. The anti-peeping light source 130 is disposed on the overhang structure 160 and located in the non-opening region 102. The light-shielding layer 140 is disposed on the anti-peeping light source 130 and located in the non-opening region 102 for blocking the vertically emitted light of the anti-peeping light source 130. The packaging layer 113 is disposed on the light-shielding layer 140 for sealing the light-emitting units 120.

[0031] In the present application, by disposing the anti-peeping light source 130 on the overhang structure 160 in the non-opening region 102, the position of the overhang structure 160 in the non-opening region 102 is used to form the anti-peeping light source 130. When the anti-peeping light source 130 emits light, the light emitted perpendicular to the substrate 110 will be blocked by the light-shielding layer 140 to prevent the light from affecting the normal display. There is a part of the light with an angle or a large angle that exits from the opening region 101. When viewing the display panel 100 from the side, due to the action of the large-angle light of the anti-peeping light source 130, the brightness at a large angle is enhanced and the gray scale becomes larger, resulting in inaccurate gray scale or multiple sub-pixels being mixed and causing halos at a large viewing angle or a side viewing angle, thereby causing the display to show different colors and making it impossible to clearly see the real displayed picture, realizing anti-peeping at a large viewing angle or a side viewing angle. When the anti-peeping light source 130 is turned on, due to the action of the light-shielding layer 140, there is no loss when viewing the display picture from the front view angle. Furthermore, by controlling the on / off of the anti-peeping light source 130, the anti-peeping function and the normal display function of the display panel 100 are switched.

[0032] 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, the metal mask is no longer used in device fabrication. Instead, the overhang structure 160 is used to partition the light-emitting unit 120 devices between pixels, thereby realizing independent light-emitting units 120. By using the maskless evaporation technology, the passive matrix OLED has high resolution and high color, and 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 function as a partition film layer. That is, during the evaporation of a certain film layer of the light-emitting unit 120, the overhang structure 160 can partition the materials of the light-emitting unit 120 in the opening area 101 from the materials of the light-emitting unit 120 in the non-opening area 102. The materials of the light-emitting unit 120 in the non-opening area 102 are generally redundant materials and can be removed through subsequent photolithography processes. In this process, a metal mask does not need to be used, and independent partitioned light-emitting units 120 can be formed in multiple opening areas 101.

[0033] The anti-peeping light source 130 in this application adopts a technology in which a metal-organic framework material (MOFs) emits visible light under the excitation of non-visible light. The metal-organic framework material is used for light emission and serves as the anti-peeping light source 130. The metal-organic framework material is a porous material formed by the self-assembly of metal ions and organic ligands. Both metal ions and organic ligands can serve as potential light-emitting centers, and the pores of MOFs can also load light-emitting guests. 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 different organic ligands or metal ions are also different.

[0034] 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). Through the anisotropic growth of metal ions and organic ligands, they are first assembled into a ribbon structure, and then these nanoribbons are wound together and gelated to form a 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 emissions of different colors, thereby realizing the controllability of multiple colors under the excitation of the same wavelength. At the same time, by changing the ion type and ratio, emissions of the same color at different wavelengths can be realized.

[0035] The metal-organic framework materials in this embodiment are mainly lanthanide metal-organic framework materials. Lanthanide metal-organic framework materials have the characteristic of emitting light under non-visible light excitation and have various 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 materials have an antenna effect, that is, the ligand absorbs energy to the excited state, undergoes intersystem crossing to the triplet state, and the triplet state sensitizes the lanthanide ions to achieve antenna effect luminescence. Among them, to achieve the simultaneous luminescence of ligands and metal ions, the energy transfer efficiency from the ligand to europium ions can be regulated by introducing a boronic acid group onto terephthalic acid. Utilizing the simultaneous luminescence of ligands and metal ions, the boronic acid group has a strong affinity for fluoride ions and H2O2, realizing the ratiometric luminescence sensing and visual detection of fluoride ions and H2O2. Different from regulating energy transfer, aggregation-induced emission ligands and lanthanide ions are used to prepare MOFs, and the luminescence is enhanced by coordinating to restrict the intramolecular rotation of the ligand. Combining with the antenna effect luminescence of europium ions, the simultaneous enhanced luminescence of the ligand and europium ions is achieved. For example, by adjusting the ratio of lanthanide element ions and ligands, taking Ln-MOF[TbxEu1-x (TCBA)(H2O)]2·DMF as an example, among them, 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. By adjusting the ratio of Eu(III), Tb(III), and Gd(III), the change in luminescence color can be achieved, that is, different colored luminescent MOFs can be realized by combining different ligands and metal ions. For simultaneous luminescence of host and guest, simultaneous luminescence of mixed metals, and mixed MOFs, the ligands and metal ions used are generally different. Taking the Ru@MIL-NH2 material as an example for simultaneous luminescence of host and guest, Ru(bpy) 32+ has red fluorescence, and MIL-NH2 has blue fluorescence, realizing blue-red host-guest luminescence of MOFs under single excitation at 300 nm. Simultaneous luminescence of mixed metals can be easily prepared by using Ln3+ ions with similar atomic radii and coordination modes and adjusting the ratio of Ln3+ ions to prepare mixed lanthanide metal MOFs. Utilizing the red, green, and blue luminescence of Eu3+, Tb3+, and Dy3+. For simultaneous luminescence of mixed MOFs, taking Eu3+ and Tb3+ as metal nodes, red-light Eu-MOFs and green-light Tb-MOFs are respectively prepared by reacting with 2,5-dimethylbenzeneboronic acid, and together with blue-light UiO-66-NH2, a tricolor MOFs ink is prepared.

[0036] In addition to the four luminescence paradigms for realizing multi-luminescent lanthanide metal-organic framework materials mentioned above, 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 ratios of Eu(III), Tb(III), and Gd(III), or the ratios of Eu3+, Tb3+, and Dy3+, etc., and selecting wavelengths between 250 nm and 350 nm in the non-visible light range, different lanthanide metal-organic framework materials can have different luminescence colors. In this embodiment, the lanthanide metal-organic framework materials are mainly utilized to emit monochromatic light such as red, green, or blue under different material ratios, so as to achieve anti-peeking of red light, green light, and blue light.

[0037] Specifically, the display panel 100 of the present application further includes a non-visible light emitter 134, and the non-visible light emitter 134 is configured to emit non-visible light towards the anti-peeking light source 130. In this embodiment, the installation position of the non-visible light emitter 134 can be located on the back surface of the substrate 110 or between the pixel definition layer 111 and the substrate 110. The non-visible light emitter 134 is controlled to operate through an electrical signal. Since the anti-peeking light source 130 does not require brightness control during operation, nor does it require individual control of each anti-peeking light source 130. It only needs to control the anti-peeking light source 130 to emit different colors of light such as red, green, or blue when anti-peeking is required, so that the outgoing light at a large viewing angle is mixed, resulting in being unable to see clearly. Moreover, in the OLED display panel 100, the light-emitting units 120 at different positions can be individually controlled. Therefore, when some pixels do not display, the anti-peeking light source 130 can emit light, causing the pixel to also display at a large viewing angle, so that the display content at a large viewing angle is interfered, thereby achieving anti-peeking at a large viewing angle.

[0038] The advantage of the metal-organic framework material of the present application is that it does not require a voltage to be provided inside the display panel 100 for driving, but requires excitation by non-visible light to emit light. That is, the anti-peeking light source 130 is arranged in the non-opening area 102, for example, on the pixel definition layer 111 or other positions where it is easy to implement, and the anti-peeking light source 130 can be arranged by occupying a relatively small space. Compared with the solution of improving the non-opening area 102 in the exemplary technology and occupying the area of one sub-pixel to synchronously arrange the anti-peeking light source 130, it does not require too much area and does not require improvement of the non-opening positions within the pixel. Due to the problem of the device occupation area of the light-emitting unit 120, when using the light-emitting unit 120 in the non-opening area 102, the position of the opening needs to be squeezed. When originally three sub-pixels form a pixel, at this time, within one pixel, the anti-peeking sub-pixel will also occupy an area, resulting in the need to set four sub-pixels, causing the opening area to shrink and resulting in display problems.

[0039] Of course, in one embodiment, the non-visible light emitters 134 can be set by partition, so as to control the non-visible light emitters 134 in different regions to emit light respectively, thereby realizing partition anti-peeping. The specific partition method can be designed according to actual needs. For example, upper and lower partitions, left and right partitions, and middle partition settings can be used. By setting different regions, the function of partition anti-peeping can be realized.

[0040] In one embodiment, the hanging structure 160 includes a conductive part 161 and a hanging part 162. The hanging part 162 is arranged on the conductive part 161. The hanging part 162 includes an upper part 1621 and a lower part 1622. The radial width of the lower part 1622 is smaller than that of the upper part 1621. A through groove 163 is arranged on the conductive part 161. In the orthographic projection of the substrate 110, the through groove 163 overlaps with the anti-peeping light source 130.

[0041] The anti-peeping light source 130 in this embodiment needs to work under the excitation of non-visible light. In the hanging structure 160, the conductive part 161 is generally formed of an opaque metal material, which causes the non-visible light to be unable to pass through the conductive part 161 and enter the anti-peeping light source 130, so that the anti-peeping light source 130 cannot be excited to emit light normally. Therefore, in this solution, by using the area where the hanging structure 160 is located, a through groove 163 is arranged on the conductive part 161. Generally, only the lanthanide metal-organic framework material in the area of the through groove 163 can emit visible light, thereby forming the anti-peeping function.

[0042] Generally speaking, the lanthanide metal-organic framework material can be formed on the hanging structure 160 by printing or coating. Of course, the lanthanide metal-organic framework material can also be used as a part of the hanging structure 160 to replace the hanging part 162 on the hanging structure 160. This embodiment includes the ways of arranging a groove 1621a on the hanging part 162 to accommodate the anti-peeping light source 130 and using the material of the anti-peeping light source 130 to replace the hanging part 162, but is not limited to the above ways.

[0043] Specifically, this embodiment relates to a new technology of replacing a polarizer with a COE (Color film on Encapsulation), that is, a color filter layer 150 is provided on the encapsulation layer 113. The color filter part is provided with a plurality of color filter parts in each of the plurality of opening areas 101. Generally speaking, the color filter part includes a red filter part 151R, a green filter part 151G, and a blue filter part 151B. Three adjacent color filter parts 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 part 151R, the light brightness of the green filter part 151G, and the light brightness of the blue filter part 151B, any color can be formed within one pixel, that is, by controlling the gray levels of the red sub-pixel, the green sub-pixel, and the blue sub-pixel, different color displays can be achieved. In the organic light-emitting display panel 100, different color displays are mainly achieved by controlling the brightness of the light-emitting unit 120.

[0044] Specifically, the color filter layer 150 is provided on the encapsulation layer 113, and includes a plurality of color filter parts. The color filter parts are located in the opening areas 101. The light-shielding layer 140 is provided on the same layer as the color filter parts. The light-shielding layer 140 is provided on the anti-peeping light source 130 and is located in the non-opening area 102 for blocking the vertically emitted light of the anti-peeping light source 130.

[0045] In this embodiment, the light-shielding layer 140 that blocks the vertically emitted light of the anti-peeping light source 130 is provided on the same layer as the color filter parts, 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 and prevent the anti-peeping light source 130 from affecting the front viewing. The color filter parts also have the function of absorbing and filtering ambient light. Generally speaking, the color filter parts include 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.

[0046] Specifically, the red color filter portion 151R and the red light emitting unit 120R are disposed within the same opening area 101, the green color filter portion 151G and the green light emitting unit 120G are disposed within the same opening area 101, and the blue color filter portion 151B and the blue light emitting unit 120B are disposed within 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 form a pixel. Within one pixel, at least one anti-peeking light source 130 is disposed, and the anti-peeking light source 130 is disposed 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-peeking light source 130 is disposed within one pixel. By using this anti-peeking light source 130, color mixing anomalies may occur when the pixel is displayed at a large viewing angle, resulting in an effect where the display content cannot be clearly viewed at a large angle.

[0047] In this embodiment, due to the monochromatic light filtering effect of the color filter portion, when the anti-peeking light source 130 emits monochromatic light, although it can match the color filter portion of the same color, it cannot pass through the color filter portions of other adjacent colors. Taking the anti-peeking light source 130 emitting red light as an example, the red emitted light can pass through the red color filter portion 151R for emission, while the red emitted light at the positions of the green color filter portion 151G and the blue color filter portion 151B will be absorbed and cannot be emitted. At this time, at a large angle, there will be an abnormal brightness of the red sub-pixels, resulting in the display content not being clearly visible at a large viewing angle or a side viewing angle, thereby achieving anti-peeking.

[0048] However, relatively speaking, since the red emitted light will be absorbed by the green color filter portion 151G and the blue color filter portion 151B, the light utilization rate of the anti-peeking light source 130 is relatively low, resulting in a higher power consumption when a better anti-peeking effect is required. Therefore, the anti-peeking light source 130 can also adopt a two-color or multi-color light emission mode. The visible light emitted by the anti-peeking light source 130 includes two or more of blue light, green light, or red light.

[0049] Continue to refer to Figure 1As shown, in this embodiment, the anti-peeking light source 130 adopts a two-color light-emitting mode. The anti-peeking light source 130 can be divided into a first-color anti-peeking part 131, a second-color anti-peeking part 132, and a third-color anti-peeking part 133. That is, the anti-peeking light source 130 includes the first-color anti-peeking part 131, the second-color anti-peeking part 132, and the third-color anti-peeking part 133. The first-color anti-peeking part 131 is disposed between the red light-emitting unit 120R and the green light-emitting unit 120G. The second-color anti-peeking part 132 is disposed between the red light-emitting unit 120R and the blue light-emitting unit 120B. The third-color anti-peeking part 133 is disposed between the green light-emitting unit 120G and the blue light-emitting unit 120B. Among them, the first-color anti-peeking part 131 is configured to emit red light and green light under non-visible light excitation. The second-color anti-peeking part 132 is configured to emit red light and blue light under non-visible light excitation. The third-color anti-peeking part 133 is configured to emit green light and blue light under non-visible light excitation.

[0050] In this embodiment, by controlling the anti-peeking light source 130, two-color light can be emitted, so that the emitted light of the anti-peeking light source 130 disposed between the two color filter parts can be emitted from between the above two color filter parts respectively. Thus, the emitted light of the anti-peeking light source 130 is fully utilized for anti-peeking, and the anti-peeking light source 130 can only emit two-color light without interference from other color lights. Moreover, importantly, the anti-peeking function is provided at the four side viewing angles of the left, right, up, and down of the display panel 100, while the single-color anti-peeking light source 130 is prone to the risk that it can prevent peeking at one side viewing angle but cannot prevent peeking at other sides.

[0051] 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-peeking light source 130 to emit red, green, and blue three-color lights. When displaying, various color display lights can be obtained by the cooperation and mutual superposition of different color light-emitting units 120 and color filter parts. Similarly, various color anti-peeking lights can be obtained by the mutual superposition of different color anti-peeking light sources 130 to achieve a better anti-peeking effect. It can be understood that since the light-emitting units 120 of the OLED display panel 100 can be individually controlled, when display is not performed at certain pixel positions, at this time, the first-color anti-peeking part 131, the second-color anti-peeking part 132, and the third-color anti-peeking part 133 are made to work, 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 unable to be seen clearly.

[0052] It is worth mentioning that the solution of the present application can also be used for OLED display panels with non-COE technology. In this case, the black matrix in the color filter layer cannot be used for the corresponding light-shielding layer, and an additional light-shielding layer needs to be formed on the anti-peeping light source to block the vertically emitted light of the anti-peeping light source.

[0053] Figure 3 It is a schematic diagram of another display panel 100 according to the first embodiment of the present application. Refer to Figure 3 as shown. Figure 3 It is Figure 2 a cross-sectional schematic diagram along the cutting line AA. In this embodiment, the anti-peeping light source 130 can be accommodated by forming a groove 1621a on the overhanging portion 162 of the overhanging structure 160.

[0054] Specifically, a plurality of grooves 1621a are provided on the upper portion 1621, and the anti-peeping light sources 130 are respectively disposed in the grooves 1621a. The positions of the grooves 1621a correspond one-to-one with the positions of the above-mentioned through grooves 163, so that the anti-peeping light sources 130 can receive non-visible light passing through the through grooves 163. Since the grooves 1621a need to be formed, when forming the upper portion 1621 of the overhanging portion 162, a semi-mask technology is adopted to form the grooves 1621a for accommodating the anti-peeping light sources 130.

[0055] In this embodiment, the anti-peeping light sources 130 are accommodated by forming grooves 1621a on the upper portion 1621 of the overhanging portion 162, so that the non-opening area 102 has the ability to emit light at large angles. Moreover, there will be no influence between the lanthanide metal-organic framework material and the material of the upper portion 1621. The anti-peeping light sources 130 are disposed in the grooves 1621a of the upper portion 1621, and in the subsequent packaging process, the anti-peeping light sources 130 are sealed in the grooves 1621a by the packaging layer 113. Of course, considering that when the upper portion 1621 of the overhanging portion 162 is formed of an inorganic insulating material, its thickness is relatively thin. In this case, the anti-peeping light sources 130 can be directly disposed on the upper portion 1621 of the overhanging portion 162, and the packaging layer 113 covers the anti-peeping light sources 130 through subsequent packaging.

[0056] 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.

[0057] 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.

[0058] Specifically, the upper portion 1621 is formed of a lanthanide metal organic framework material to serve as the anti-peeping light source 130 .

[0059] 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.

[0060] 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.

[0061] Figure 5 is a top view schematic diagram of a display panel 100 according to a second embodiment of the present application, see Figure 5As shown, it is formed by replacing the upper part 1621 of the overhang part 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 net-like upper part 1621 by printing or coating. Compared with the anti-peeping light source 130 formed at the positions of multiple through grooves 163 in the previous embodiment, the manufacturing complexity is reduced, and the characteristics of the metal-organic framework material can also act as the upper part 1621 of the overhang part 162 to realize the function of the overhang structure 160 for partitioning the light-emitting unit 120. In this embodiment, the upper part 1621 of the overhang part 162 can be completely replaced by the lanthanide metal-organic framework material, and the metal-organic framework material in the area of the through groove 163 can emit light under the excitation of non-visible light.

[0062] In one embodiment, considering that the overhang structure 160 needs to partition adjacent light-emitting units 120 during the manufacturing process of the light-emitting unit 120, and when evaporating each film layer in the light-emitting unit 120, various material particles need to be emitted from the evaporation source. In order to prevent each material particle from entering the porous gaps of the lanthanide metal-organic framework material, the width of the porous gaps of the lanthanide metal-organic framework material can be set to be smaller than the width of the particles emitted from the evaporation source. Of course, a protective layer can also be provided on the lanthanide metal-organic framework material to prevent the particles emitted from the evaporation source from entering the porous structure of the lanthanide metal-organic framework material.

[0063] Figure 6 It is a schematic diagram of the display panel 100 according to the third embodiment of the present application. Refer to Figure 6 As shown, in this embodiment, the overhang part 162 can also be formed by replacing the material of the overhang part 162 with the lanthanide metal-organic framework material.

[0064] Specifically, the upper part 1621 and the lower part 1622 are respectively formed of the lanthanide metal-organic framework material to serve as the anti-peeping light source 130.

[0065] In this embodiment, the upper part 1621 and the lower part 1622 of the overhang part 162 are respectively replaced by the lanthanide metal-organic framework material and no longer formed of insulating materials. The advantage is that the lanthanide metal-organic framework material can be directly formed by coating and printing, and there is no need to use methods such as deposition and etching to directly form the overhang part 162 on the conductive part 161.

[0066] Specifically, the included angle between the bottom surface of the upper part 1621 and the side surface of the lower part 1622 is between 40 degrees and 80 degrees.

[0067] In this embodiment, since the metal-organic framework material has better strength and toughness, when forming the overhang portion 162, the included angle between the bottom surface of the upper portion 1621 and the side surface of the lower portion 1622 can be made larger. For the overhang portion 162 formed of an insulating material such as an inorganic insulating material in the above embodiment, due to the strength and toughness limitations of the inorganic insulating material, the maximum included angle between the bottom surface of the upper portion 1621 and the side surface of the lower portion 1622 is 60 degrees, generally between 45 degrees and 60 degrees. By using the metal-organic framework material, the maximum included angle between the bottom surface of the upper portion 1621 and the side surface of the lower portion 1622 can reach 80 degrees. Considering that the larger the angle, the smaller the space occupied by the overhang structure 160 itself, and the better the blocking effect on the light-emitting unit 120. By reducing the size of the overhang structure 160 itself, the area of the opening region 101 can be increased.

[0068] Certainly, in another embodiment, an anti-peeping light source 130 can also be provided at the positions of the upper portion 1621 and the lower portion 1622 of the overhang portion 162 corresponding to the through groove 163. This method can not completely replace the upper portion 1621 and the lower portion 1622 formed of the insulating material, but only replace the upper portion 1621 and the lower portion 1622 formed of the insulating material in the region of the through groove 163.

[0069] Figure 7 is a schematic diagram of the display panel 100 according to the fourth embodiment of the present application. Refer to Figure 7 As shown, at the position of the through groove 163, a convex surface 112 is provided on the side of the pixel definition layer close to the overhang structure 160. The convex surface 112 is used to diverge the non-visible light onto the anti-peeping light source 130.

[0070] The main function of the convex surface 112 is to diverge the non-visible light. Since the conductive portion 161 of the overhang structure 160 is also a mesh structure, the conductive portion 161 between adjacent light-emitting units 120 needs to conduct electricity continuously. Therefore, in the case of providing the through groove 163 and without interrupting the conductive portion 161, the width of the through groove 163 provided on the conductive portion 161 is small, that is, the conductive portion 161 exists around the through groove 163 for wrapping, so as to realize the connection of the conductive portion 161. Therefore, in this embodiment, the non-visible light is diverged by the convex surface 112 and then emitted onto the anti-peeping light source 130 on the overhang portion 162, so that the anti-peeping light source 130 with a larger area emits light, thereby improving the anti-peeping effect.

[0071] Among them, the convex surface 112 can mainly adjust the etched pattern to make the pixel definition layer 111 have a certain arc surface and protrude in the direction of the overhang structure 160, so as to play a role in diverging and homogenizing the non-visible light.

[0072] Figure 8It is a schematic diagram of another display panel 100 according to the fourth embodiment of the present application. Refer to Figure 8 As shown, specifically, the anti-peeping light source 130 at least includes a first anti-peeping part 135 and a second anti-peeping part 136. The non-visible light emitter 134 at least includes a first excitation layer 134a and a second excitation layer 134b. The first anti-peeping part 135 is configured to emit first anti-peeping light under the control of the first excitation layer 134a, and the second anti-peeping part 136 is configured to emit second anti-peeping light under the control of the second excitation layer 134b. The non-visible light wavelength ranges of the first excitation layer 134a and the second excitation layer 134b are different.

[0073] Among them, the intensity of the first anti-peeping light is less than that of the second anti-peeping light. The present application adapts to anti-peeping in different modes. For example, when displaying at a low brightness, the first anti-peeping light is used for anti-peeping, and when displaying at a high brightness, the second anti-peeping light is used for anti-peeping.

[0074] In this embodiment, two anti-peeping parts are taken as an example for illustration. In practice, it is not limited to two anti-peeping parts, and it also needs to be designed according to the actual situation. In this solution, it is mainly considered that when displaying at a high brightness and a low brightness, if the brightness of the anti-peeping light of the two displays is the same, display problems such as light leakage will occur, especially when displaying at a low brightness. When the brightness of the anti-peeping light source 130 is relatively large, it is easy to have a light leakage problem. When displaying at a high brightness, if the brightness of the anti-peeping light source 130 is relatively small, 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 for high-brightness display and low-brightness display. For example, when displaying at a high brightness, the brightness of the anti-peeping light is greater, and when displaying at a low brightness, the anti-peeping brightness is smaller, so as to achieve a better anti-peeping effect.

[0075] 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 anti-peeping part 135 and the second anti-peeping part 136 can be controlled to work separately or simultaneously, and at least two levels of anti-peeping brightness of the first anti-peeping part 135, the second anti-peeping part 136, and both working simultaneously can be achieved. Of course, more levels of brightness compensation can also be achieved by continuing to increase the number of anti-peeping 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 the low-brightness display range, and the second brightness range is the high-brightness display range.

[0076] In one embodiment, the brightness of the first anti-peeping portion 135 and the second anti-peeping portion 136 may be the same or different. When the brightness of the first anti-peeping portion 135 and the second anti-peeping portion 136 is the same, it is necessary to control the first anti-peeping portion 135 and the second anti-peeping portion 136 to be turned on simultaneously and individually to achieve different compensation brightness. When the brightness of the first anti-peeping portion 135 and the second anti-peeping portion 136 is set to be different, the first anti-peeping portion 135 or the second anti-peeping portion 136 can be individually controlled to be turned on or off to achieve anti-peeping for the multi-step brightness of the display panel 100.

[0077] In another embodiment, the second anti-peeping portion 136 is disposed around the first anti-peeping portion 135, and the first anti-peeping portion 135 and the second anti-peeping portion 136 are disposed on the same layer. The anti-peeping light source 130 mentioned above is located in a through groove 163. In this embodiment, due to the different positions of the second anti-peeping portion 136 and the first anti-peeping portion 135, there are also differences in the large viewing angles of the two. The second anti-peeping portion 136 disposed on the outside has a smaller deviation in the emission angle compared to the first anti-peeping portion 135 because it is disposed closer to the opening area 101, that is, the side viewing angle anti-peeping angle of the first anti-peeping portion 135 is larger, so that the user can also see the anti-peeping emission light of the first anti-peeping portion 135 at a larger side viewing angle, achieving anti-peeping at a larger angle.

[0078] Figure 9 is a schematic diagram of the display device of the present application. Refer to Figure 9 As shown, the present application also discloses a display device. The display device 200 includes a driving circuit 210 and the display panel 100 in any of the above embodiments. The driving circuit 210 is used to drive the display panel 100 to display.

[0079] It should be noted that the inventive concept of the present application can form a very large number of embodiments. However, due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of not conflicting, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0080] The above content is a further detailed description of the present application in combination with specific optional implementation manners. It cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope 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 An encapsulation layer, disposed on the light shielding layer and used for sealing the light emitting unit; 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; 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.

2. The display panel according to claim 1, 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.

3. The display panel according to claim 1, characterized in that: The upper portion is formed by using the lanthanide metal organic framework material to serve as the anti-peeping light source.

4. The display panel according to claim 1, 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.

5. The display panel according to claim 1, 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.

6. The display panel according to claim 1, 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.

7. The display panel according to claim 1, 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.

8. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 7, wherein the driving circuit is used to drive the display panel to display.

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