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 peep-proof light source, a packaging layer and a color filter 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 peep-proof light source is arranged on the pixel definition layer and located in the non-opening area; the packaging layer covers the light-emitting unit and the peep-proof light source and is used for sealing the light-emitting unit; the shading layer is arranged on the peep-proof light source, located in the non-opening area and used for shading vertical emergent light of the peep-proof light source. 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] 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 used in 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 display is to attach 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 the light from exiting the display panel at a fixed angle, which is the simplest and most direct solution with a 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, an anti-peeping light source, a packaging layer, and a color filter 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 anti-peeping light source is disposed on the pixel definition layer and located in the non-opening regions; the packaging layer covers the light-emitting units and the anti-peeping light source and is used for sealing the light-emitting units; the light-shielding layer is disposed on the anti-peeping light source and located in the non-opening regions and is used for blocking the vertically emitted light of the anti-peeping light source.

[0006] Optionally, the anti-peeping light source is formed by using a metal-organic framework material, and the metal-organic framework material includes a lanthanide metal-organic framework material; the anti-peeping light source is used to generate visible light under the excitation of invisible light, and the visible light includes one or more of blue light, green light, or red light.

[0007] Optionally, the display panel further includes a color filter layer disposed on the encapsulation layer, including a plurality of color filter portions located in the opening region. The light-shielding layer is disposed on the same layer as the color filter portion, and is disposed on the anti-peeking light source and located in the non-opening region for blocking the vertically emitted light of the anti-peeking light source.

[0008] Optionally, the display panel further includes a polarizing layer disposed on the encapsulation layer; the light-shielding layer is disposed between the encapsulation layer and the pixel definition layer.

[0009] Optionally, the light-emitting unit includes a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit; at least one adjacent red light-emitting unit, one green light-emitting unit, and one blue light-emitting unit form a pixel. In one pixel, at least one anti-peeking light source is disposed between the red light-emitting unit and the blue light-emitting unit, between the red light-emitting unit and the green light-emitting unit, or between the green light-emitting unit and the red light-emitting unit; when the display panel includes a color filter layer, the color filter portion includes a red filter portion, a green filter portion, and a blue filter portion; the red filter portion and the red light-emitting unit are disposed in the same opening region, the green filter portion and the green light-emitting unit are disposed in the same opening region, and the blue filter portion and the blue light-emitting unit are disposed in the same opening region.

[0010] Optionally, the visible light emitted by the anti-peeking light source includes two or more of blue light, green light, or red light.

[0011] Optionally, in the non-opening region, under the orthographic projection of the substrate, the projection of the anti-peeking light source is within the projection range of the light-shielding layer, and the boundary of the anti-peeking light source is at least 2 nm away from the boundary of the light-shielding layer.

[0012] Optionally, the anti-peeking light source includes a first anti-peeking portion, a second anti-peeking portion, and a third anti-peeking portion. The first anti-peeking portion is disposed between the red light-emitting unit and the green light-emitting unit, the second anti-peeking portion is disposed between the red light-emitting unit and the blue light-emitting unit, and the third anti-peeking portion is disposed between the green light-emitting unit and the blue light-emitting unit; wherein, the first anti-peeking portion is configured to emit red light and green light under the excitation of invisible light, the second anti-peeking portion is configured to emit red light and blue light under the excitation of invisible light, and the third anti-peeking portion is configured to emit green light and blue light under the excitation of invisible light.

[0013] Optionally, the pixel definition layer is provided with a groove, and the anti-peeking light source is disposed in the groove.

[0014] The present application also 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 the anti-peeping light source in the non-opening area, when the anti-peeping light source emits light, the light rays perpendicular to the substrate emitted by it will be blocked by the light-shielding layer, preventing the influence of this part of the light rays on 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 is enhanced and the gray scale becomes larger at a large angle, resulting in inaccurate display gray scale or multiple sub-pixels being mixed and causing halos at a large viewing angle or a side viewing angle, thus 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 is turned on, due to the function of the light-shielding layer, 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, the switching between the anti-peeping function and the normal display function of the display panel is realized. Another advantage of the present application is that the anti-peeping light source is arranged inside the display panel, further reducing the thickness increase caused by arranging the anti-peeping light source on the back of the substrate and reducing the structural complexity. BRIEF 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 embodiments of the present application, and are used to explain the principles of the present application together with the text description. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. 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 schematic diagram of the display panel of the second embodiment of the present application;

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

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

[0021] Figure 5 is a schematic diagram of the display device of the present application.

[0022] Among them, 100 is a display panel; 101 is an opening area; 102 is a non-opening area; 110 is a substrate; 111 is a pixel definition layer; 112 is a groove; 113 is a packaging layer; 120 is a light-emitting unit; 120R is a red light-emitting unit; 120G is a green light-emitting unit; 120B is a blue light-emitting unit; 130 is an anti-peeping light source; 131 is a first anti-peeping part; 132 is a second anti-peeping part; 133 is a third anti-peeping part; 134 is a non-visible light emitter; 140 is a light-shielding layer; 150 is a color filter layer; 151R is a red filter part; 151G is a green filter part; 151B is a blue filter part; 160 is a polarizing layer; 200 is a display device; 210 is a driving circuit. Detailed implementation manners

[0023] It should be understood that the terms, specific structures and functional details disclosed herein are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0024] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed 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 the convenience of describing the present application in a simplified manner, 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 construed 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.

[0025] The present application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0026] Figure 1 It is a schematic diagram of the display panel according to the first embodiment of the present application. Refer to Figure 1As shown in the figure, 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 anti-peeping light source 130, a packaging layer 113, and a color filter layer 150. 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 anti-peeping light source 130 is disposed on the pixel definition layer 111 and located in the non-opening regions 102; the packaging layer 113 covers the light-emitting units 120 and the anti-peeping light source 130 and is used to seal the light-emitting units 120; the light-shielding layer 140 is disposed on the anti-peeping light source 130 and located in the non-opening regions 102 and is used to block the vertically emitted light of the anti-peeping light source 130.

[0027] In the present application, by disposing the anti-peeping light source 130 in the non-opening regions 102, when the anti-peeping light source 130 emits light, the light emitted perpendicularly to the substrate 110 will be blocked by the light-shielding layer 140, preventing the light in this part from affecting the normal display. However, there is still some light with an angle or a large angle that exits from the opening regions 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 display gray scale or multiple sub-pixels being mixed and causing halos at a large viewing angle or a side viewing angle, thereby making the display color different 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 screen from the front view. 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. Another advantage of the present application is that the anti-peeping light source 130 is disposed inside the display panel 100, further reducing the thickness increase caused by disposing the anti-peeping light source 130 on the back of the substrate 110 and reducing the structural complexity.

[0028] Specifically, the anti-peeping light source 130 of the present application uses a metal-organic framework material (MOFs) to generate visible light under the excitation of invisible light. 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 invisible light, adding different organic ligands or metal ions results in different emitted light colors.

[0029] Specifically, the metal-organic framework material in this embodiment is mainly a lanthanide metal-organic framework material, and the lanthanide metal-organic framework material has various forms of luminescence, such as ligand and metal ion co-luminescence, host-guest co-luminescence, mixed metal co-luminescence, and mixed MOFs co-luminescence and other luminescence forms. Taking ligand and metal ion co-luminescence as an example, lanthanide metal ions 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, for ligand and metal ion co-luminescence, the energy transfer efficiency from the ligand to europium ions can be regulated by introducing a borate group on terephthalic acid, and multi-luminescence MOFs can be constructed by using ligand and metal ion co-luminescence. The borate group has a strong affinity for fluoride ions and H 2 O 2 to achieve proportional luminescence sensing and visual detection of fluoride ions and H 2 O 2 . Different from regulating energy transfer, preparing MOFs with aggregation-induced emission ligands and lanthanide ions enhances luminescence by restricting the intramolecular rotation of the ligand through coordination, and combines the antenna effect luminescence of europium ions to achieve simultaneous enhanced luminescence of the ligand and europium ions. 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 of luminescence color can be achieved, and the excitation wavelength is about 300-350 nm.

[0030] Simultaneous emission from the host and guest can be achieved by adding tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)32+) that emits red light to the precursor of MIL-NH2, and Ru@MIL-NH2 can be prepared by a one-pot method. Among them, Ru(bpy)32+ has red fluorescence and MIL-NH2 has blue fluorescence, realizing blue and red host-guest luminescence of MOFs under a single excitation at 300 nm. Simultaneous emission of mixed metals can be achieved by using Ln3+ ions with similar atomic radii and coordination modes. By adjusting the ratio of Ln3+ ions, it is easy to prepare mixed lanthanide metal MOFs. Utilizing the red, green, and blue luminescence of Eu3+, Tb3+, and Dy3+ and combining the principle of the three primary colors, white-light-emitting mixed metal MOFs can be prepared under excitation at 275 nm. 2,5-Dicarboxylphenylboronic acid can form a MOF gel with Ln3+ ions through a hydrothermal reaction under normal pressure. By regulating the ratio of Eu3+, Tb3+, and Dy3+, different luminescent mixed metal MOF gels can be obtained. Utilizing the luminescence of different colors under excitation at 275 nm, color luminescence can be achieved through the MOF gel. Simultaneous emission of mixed MOFs uses Eu3+ and Tb3+ as metal nodes and reacts with 2,5-dicarboxylphenylboronic acid to prepare red-light-emitting Eu-MOFs and green-light-emitting Tb-MOFs respectively. Together with blue-light-emitting UiO-66-NH2, tricolor MOF inks can be prepared. Multicolor is shown under a single excitation at 275 nm.

[0031] 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, the wavelength of the invisible light can be selected between 250 nm and 350 nm to enable different lanthanide metal-organic framework materials to have different luminescence colors.

[0032] The lanthanide metal-organic framework material in this embodiment can be formed above the pixel definition layer 111 by coating or printing. Of course, in order to excite the lanthanide metal-organic framework material, a non-visible light emitter 134 also needs to be provided below the anti-peeping light source 130. The wavelength of the light emitted by this non-visible light emitter 134 is between 250 nm and 350 nm, so as to control the lanthanide metal-organic framework material to emit light. It is worth mentioning that the anti-peeping light source 130 of this application does not require an additional drive circuit for control and only needs to be excited under non-visible light to play an anti-peeping role. The visible light emitted by the anti-peeping light source 130 in this embodiment includes one, two, or more of blue light, green light, or red light. The color of the light emitted by the anti-peeping light source 130 can be selected according to different situations.

[0033] Specifically, this embodiment relates to a new technology of replacing a polarizer with 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 scale of the red sub-pixel, the gray scale of the green sub-pixel, and the gray scale of 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.

[0034] Specifically, the color filter layer 150 is provided on the encapsulation layer 113, 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.

[0035] 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 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. The blue filter part 151B can absorb light of other colors and transmit blue light.

[0036] Specifically, the red light filtering portion 151R and the red light emitting unit 120R are disposed within the same opening region 101, the green light filtering portion 151G and the green light emitting unit 120G are disposed within the same opening region 101, and the blue light filtering portion 151B and the blue light emitting unit 120B are disposed within the same opening region 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 provided, 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 provided 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.

[0037] 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 light filtering portion 151R for emission, while the red emitted light at the positions of the green light filtering portion 151G and the blue light filtering 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 being unable to be clearly seen at a large viewing angle or a side viewing angle, thus achieving anti-peeking.

[0038] However, relatively speaking, since the red emitted light will be absorbed by the green light filtering portion 151G and the blue light filtering 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.

[0039] Figure 2 is a schematic diagram of the display panel of the second embodiment of the present application. Refer to Figure 2As shown, in this embodiment, the anti-peeking light source 130 adopts a two-color light-emitting method. The anti-peeking light source 130 can be divided into a first anti-peeking part 131, a second anti-peeking part 132, and a third anti-peeking part 133. That is, the anti-peeking light source 130 includes the first anti-peeking part 131, the second anti-peeking part 132, and the third anti-peeking part 133. The first anti-peeking part 131 is arranged between the red light-emitting unit 120R and the green light-emitting unit 120G. The second anti-peeking part 132 is arranged between the red light-emitting unit 120R and the blue light-emitting unit 120B. The third anti-peeking part 133 is arranged between the green light-emitting unit 120G and the blue light-emitting unit 120B. Among them, the first anti-peeking part 131 is used to emit red light and green light under the excitation of invisible light. The second anti-peeking part 132 is used to emit red light and blue light under the excitation of invisible light. The third anti-peeking part 133 is used to emit green light and blue light under the excitation of invisible light.

[0040] Taking the first anti-peeking part 131 as an example, the first anti-peeking part 131 is arranged between the red light-emitting unit 120R and the green light-emitting unit 120G. The first anti-peeking part 131 can emit red light and green light. At a large viewing angle, the red light can be emitted from the red color filter part 151R adjacent to the first anti-peeking part 131, and the green light can be emitted from the green color filter part 151G adjacent to the first anti-peeking part 131, so as to achieve the anti-peeking effect. Taking the second anti-peeking part 132 as an example, the second anti-peeking part 132 is arranged between the red light-emitting unit 120R and the blue light-emitting unit 120B. The second anti-peeking part 132 can emit red light and blue light. The red light is emitted from the red color filter part 151R adjacent to the second anti-peeking part 132, and the blue light is emitted from the blue color filter part 151B adjacent to the second anti-peeking part 132, so as to achieve anti-peeking. The third anti-peeking part 133 can emit green light and blue light. The green light is emitted from the green color filter part 151G adjacent to the third anti-peeking part 133, and the blue light can be emitted from the blue color filter part 151B adjacent to the third anti-peeking part 133.

[0041] In this embodiment, by controlling the anti-peeking light source 130, two-color light can be emitted, so that the light emitted by the anti-peeking light source 130 arranged between the two color filter parts can be emitted from between the above two color filter parts respectively. Thus, the light emitted by 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 display panel 100 has anti-peeking functions at the four side viewing angles of left, right, up, and down, while the monochromatic anti-peeking light source 130 is prone to the risk that it can achieve anti-peeking at one side viewing angle and cannot achieve anti-peeking 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, so as to control the light source 130 for anti-peeping to emit light of three colors: red, green, and blue. When displaying, various display light rays can be obtained by the cooperation and mutual superposition of the light-emitting units 120 of different colors and the color filter part. Similarly, various anti-peeping light rays can be obtained by the mutual superposition of the anti-peeping light sources 130 of different 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 be individually controlled, when no display is performed at certain pixel positions, the first anti-peeping part 131, the second anti-peeping part 132, and the third anti-peeping part 133 are made to work 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 unable to be clearly seen.

[0043] Figure 3 It is a schematic diagram of the display panel according to the third embodiment of the present application. Refer to Figure 3 As shown, in another embodiment, the display panel 100 involved in the present application adopts a polarization technology, that is, a polarization layer 160 is provided on the encapsulation layer 113 of the display panel 100 to reduce the problem of external ambient light reflection, and there is no need to provide a color filter layer 150. The display panel 100 further includes a polarization layer 160, and the polarization layer 160 is provided on the encapsulation layer 113; the light-shielding layer 140 is provided between the encapsulation layer 113 and the pixel definition layer 111.

[0044] In this embodiment, the light filtering function of the polarization layer 160 mainly lies in polarization and does not filter the wavelength of the light. Therefore, when the anti-peeping light source 130 uses monochromatic light, for example, the anti-peeping light source 130 disposed between the red light-emitting unit 120R and the green light-emitting unit 120G, a monochromatic light source emits light at a side viewing angle deviating from the anti-peeping light source 130 towards the red light-emitting unit 120R; a monochromatic light source also emits light at a side viewing angle deviating from the anti-peeping light source 130 towards the green light-emitting unit 120G, thus forming color mixing and causing the screen to be unable to be clearly seen at a large viewing angle. The advantage is that since there is no color filter layer 150 provided, the light of the anti-peeping light source 130 will not be absorbed, thus having a better anti-peeping effect.

[0045] In this embodiment, the light-shielding layer 140 is disposed between the encapsulation layer 113 and the pixel definition layer 111. The main function of the light-shielding layer 140 is to absorb the light emitted by the anti-peeping light source 130 perpendicular to the substrate 110, so that the light of the anti-peeping light source 130 is emitted from the opening area 101 at a certain angle. Specifically, a reflective layer can also be disposed below the light-shielding layer 140, and the angle between the surface of the reflective layer and the substrate 110 is an acute angle, so that the anti-peeping light perpendicular to the substrate direction is reflected by the reflective layer to the opening area 101 for emission, and the emission angle is smaller with respect to the substrate 110, which is more conducive to large-angle anti-peeping.

[0046] In this embodiment, the anti-peeping light source 130 can also adopt a single-color, two-color or multi-color light-emitting mode. The visible light emitted by the anti-peeping light source 130 includes one, two or more of blue light, green light or red light.

[0047] When the anti-peeping light source 130 emits monochromatic light, the light rays of the same color can be arranged around the corresponding color light-emitting units 120 as set in the above embodiment. For example, for green anti-peeping light, it is arranged between the green light-emitting unit 120G and the blue light-emitting unit 120B, that is, between the green sub-pixel and the blue sub-pixel. Taking the green sub-pixel on the left and the blue sub-pixel on the right as an example for illustration. When viewed from the right side view angle, the green anti-peeping light between the green sub-pixel and the blue sub-pixel can be emitted from the opening area 101 where the blue sub-pixel is located, so as to be seen by the large right-side view angle. When viewed from the left side view angle, the green anti-peeping light can be emitted from the opening area 101 where the green sub-pixel is located, so as to be seen by the large left-side view angle. Therefore, with respect to the COE display panel 100, in the display panel 100 provided with the polarizing layer 160, through single-color anti-peeping, the anti-peeping light can be seen from the large left and right view angles, so as to display the anti-peeping effect. It should be noted that the above situation mainly illustrates how to see the green color at a large view angle when the green sub-pixel is not displayed, so as to distinguish it from normal display. In fact, in normal display, any other single-color anti-peeping light source 130 will be seen at a large view angle, and this light will also directly affect the pattern displayed at a large view angle, resulting in problems such as incorrect gray-scale display or color deviation of the picture, and can also achieve the anti-peeping effect.

[0048] Of course, the anti-peeping light source 130 in this embodiment can also adopt two-color or multi-color anti-peeping light. From different left and right side view angles, since the polarizing layer 160 does not have a color filtering function, the red anti-peeping light and the green anti-peeping light arranged between the red sub-pixel and the green sub-pixel can be observed from both the left and right side view angles, so as to distinguish from the display pattern at a large view angle and achieve the anti-peeping effect.

[0049] In another embodiment, zonal settings can also be performed. The display area of the display panel 100 can be divided, so as to be divided into multiple areas for the anti-peeping light source 130 to be set.

[0050] For example, the display panel 100 is divided into a middle display area and a surrounding display area. The surrounding display area is arranged to surround the middle display area. Specifically, the display panel 100 can be set according to the actual situation. By setting different excitation wavelengths for the middle display area and the surrounding display area, excitation is carried out through different wavelengths. For example, the middle display area can select the first wavelength for excitation, and the surrounding display area can select the second wavelength for excitation. When anti-peeping of the middle display area is required, the non-visible light emitter 134 is controlled to emit the first wavelength or the second wavelength for control. Among them, different wavelengths of excitation can be achieved by selecting different materials, and specific selection needs to be made according to the actual situation.

[0051] Figure 4 is a schematic diagram of another display panel of the present application. Refer to Figure 4 As shown, specifically, within the non-opening area 102, under the orthographic projection of the substrate 110, the projection of the anti-peeping light source 130 is within the projection range of the light-shielding layer 140, and the boundary of the anti-peeping light source 130 is at least 2 nm away from the boundary of the light-shielding layer 140. Considering the influence of the anti-peeping light source 130 on the front display, it is necessary to set a relatively large area for the light-shielding layer 140, so as to block most of the light rays of the anti-peeping light source 130 that are close to vertical or at a small angle, thereby reducing the interference with the front viewing.

[0052] Specifically, in order to prevent the anti-peeping light source 130 from affecting the film layer, the anti-peeping light source 130 can be set in the groove 112 by setting a groove 112 on the pixel definition layer 111, so as to reduce the influence of the anti-peeping light source 130 on the internal film layer of the display panel 100. Of course, the above light-shielding layer 140 can also be set on the pixel definition or encapsulation layer 113. When the light-shielding layer 140 is set between the pixel definition layer 111 and the encapsulation layer 113, the distance between the anti-peeping light source 130 and the light-shielding layer 140 also needs to be considered, and it is necessary to enable the large-angle light rays of the anti-peeping light source 130 to exit, so as to form anti-peeping. Among them, it includes but is not limited to setting the depth of the groove 112 to be greater than the thickness of the anti-peeping light source 130; or reducing the area of the light-shielding layer 140. It can be understood that the distance and area size between the anti-peeping light source 130 and the light-shielding layer 140 can be selected according to the implementation situation. It is worth mentioning that the above setting method of the anti-peeping light source 130 is applicable to both the display panel 100 using the polarization technology and the COE display panel 100.

[0053] Figure 5 is a schematic diagram of the display device of the present application. Refer to Figure 5As shown, the present application also discloses a display device. The display device 200 includes a driving circuit 210 and a display panel 100. Among them, the driving circuit 210 is used to drive the display panel 100 to display.

[0054] 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 no conflict, 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.

[0055] The above content is a further detailed description of the present application in combination with specific optional embodiments. 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 be made, and all should 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; An anti-peeping light source is arranged on the pixel definition layer and located in the non-opening area; as well as An encapsulation layer, covering the light-emitting unit and the anti-peeping light source arrangement, and used for sealing the light-emitting unit; The light shielding layer is arranged on the anti-peeping light source and located in the non-opening area, and is used for shielding the outgoing light of the anti-peeping light source perpendicular to the base substrate.

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

3. The display panel according to claim 2, characterized in that: The display panel also includes a color filter layer, which is arranged on the encapsulation layer and includes a plurality of color filter parts, wherein the color filter parts are located in the opening area, and the shading layer is arranged on the same layer as the color filter parts, and the shading layer is arranged on the anti-peeping light source and located in the non-opening area, so as to block the vertically emitted light of the anti-peeping light source.

4. The display panel according to claim 2, characterized in that: The display panel further includes a polarizing layer, and the polarizing layer is disposed on the encapsulation layer; the light shielding layer is disposed between the encapsulation layer and the pixel definition layer.

5. The display panel according to claim 3 or 4, characterized in that: The light-emitting units include a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit; at least one adjacent red light-emitting unit, one green light-emitting unit and one blue light-emitting unit constitute a pixel, and at least one anti-peeping light source is provided in one pixel, and the anti-peeping light source is provided between the red light-emitting unit and the blue light-emitting unit, between the red light-emitting unit and the green light-emitting unit, or between the green light-emitting unit and the red light-emitting unit; When the display panel includes a color filter layer, the color filter portion includes a red filter portion, a green filter portion and a blue filter portion; the red filter portion and the red light-emitting unit are arranged in the same opening area, the green filter portion and the green light-emitting unit are arranged in the same opening area, and the blue filter portion and the blue light-emitting unit are arranged in the same opening area.

6. The display panel according to claim 5, characterized in that: The visible light emitted by the anti-peeping light source includes two or more of blue light, green light or red light.

7. The display panel according to claim 6, characterized in that: In the non-opening area, under the orthographic projection of the base substrate, the projection of the anti-peeping light source is within the projection range of the light shielding layer, and the boundary of the anti-peeping light source is at least 2 nm away from the boundary of the light shielding layer.

8. The display panel according to claim 5, characterized in that: The anti-peeping light source comprises a first anti-peeping portion, a second anti-peeping portion and a third anti-peeping portion, wherein the first anti-peeping portion is arranged between the red light emitting unit and the green light emitting unit, the second anti-peeping portion is arranged between the red light emitting unit and the blue light emitting unit, and the third anti-peeping portion is arranged between the green light emitting unit and the blue light emitting unit; Among them, the first anti-peeping part is used to emit red light and green light under the excitation of invisible light, the second anti-peeping part is used to emit red light and blue light under the excitation of invisible light, and the third anti-peeping part is used to emit green light and blue light under the excitation of invisible light.

9. The display panel according to claim 5, characterized in that: The pixel definition layer is provided with a groove, and the anti-peeping light source is arranged in the groove.

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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