Display panel and display device

Abstract

The invention discloses a display panel and a display device, and relates to the technical field of display, the display panel comprises a substrate, a first electrode layer, a peep-proof layer, a plurality of light emitting units, a plurality of peep-proof units and a color light resistance layer, the first electrode layer is arranged on the surface of the substrate; the peep-proof layer is arranged on the surface of the first electrode layer; the plurality of light-emitting units are arranged on the surface of the peep-proof layer at intervals and are connected, and a containing space is defined between every two adjacent light-emitting units; the peep-proof unit is correspondingly arranged in the accommodating space; the color photoresist layer is arranged on one side, back to the peep-proof layer, of the light-emitting unit, and the black matrix of the color photoresist layer corresponds to the peep-proof unit; the peep-proof layer can emit peep-proof light under the control of the first electrode layer, so that the display panel is in a peep-proof mode, and the peep-proof unit can become dark and expand and deform in the peep-proof mode, so that the peep-proof light emitted by the peep-proof light source is refracted and emitted out through the color photoresistor; according to the technical scheme, the peep-proof function can be freely controlled on the premise that the thickness of the display panel is not changed.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) is a new generation of popular display products with a wide viewing angle of more than 170°, providing users with good visual effects in screen sharing. However, some users hope that the display information with a wide viewing angle will not be seen when browsing personal privacy or business secrets on the display screen to prevent others from peeping. The traditional anti-peeping display mode uses anti-peeping film shutter technology to achieve the anti-peeping effect, which cannot freely control the anti-peeping function. At the same time, the thickness of the anti-peeping film affects the brightness of the light at the normal viewing angle, greatly reducing the user experience. Summary of the invention

[0003] The main purpose of the present invention is to provide a display panel and a display device, aiming to realize free control of the anti-peeping function without affecting the screen brightness at a normal viewing angle.

[0004] To achieve the above object, the present invention provides a display panel, comprising:

[0005] substrate;

[0006] A first electrode layer is disposed on a surface of the substrate;

[0007] An anti-peeping layer is arranged on a surface of the first electrode layer facing away from the substrate;

[0008] A plurality of light-emitting units are arranged at intervals on a surface of the privacy protection layer facing away from the first electrode layer and are connected to each other, and an accommodation space is defined between two adjacent light-emitting units;

[0009] A plurality of privacy protection units are correspondingly arranged in the accommodating space and located on a surface of the privacy protection layer facing away from the first electrode layer;

[0010] A color photoresist layer is arranged on the side of the light-emitting unit facing away from the anti-peeping layer, the color photoresist layer comprises staggered color photoresists and a black matrix, and the black matrix is ​​arranged corresponding to the anti-peeping unit;

[0011] The anti-peeping layer can emit anti-peeping light under the control of the first electrode layer, so that the display panel is in an anti-peeping mode. The anti-peeping unit can become dark and expand and deform in the anti-peeping mode, so that the anti-peeping light emitted by the anti-peeping layer is refracted and emitted through the color photoresist.

[0012] In one embodiment, the anti-peeping unit comprises:

[0013] A telescopic film layer is disposed on a surface of the anti-peeping layer facing away from the first electrode layer in the accommodating space, and can expand and stretch in a direction away from the anti-peeping layer in the anti-peeping mode;

[0014] A color-changing film layer, arranged on both sides of the telescopic film layer in the accommodating space, which can be changed to a dark color in the anti-peeping mode;

[0015] The collimating optical film is arranged on the side of the telescopic film layer facing away from the anti-peeping layer, and deforms from a straight shape to a bent shape under the expansion and elongation of the telescopic film layer, so that the anti-peeping light emitted by the anti-peeping layer is refracted and emitted through the color photoresist.

[0016] In one embodiment, under the expansion and extension action of the telescopic film layer, the collimating optical film is deformed from a straight shape to a vertex shape, a cone shape or a semicircular shape.

[0017] In one embodiment, the anti-peeping layer includes an anti-peeping light source, which is arranged corresponding to the telescopic film layer and the color-changing film layer and is electrically connected to the first electrode layer;

[0018] In the anti-peeping mode, the anti-peeping light source is turned on under the action of the voltage of the first electrode layer, the telescopic film layer can expand and stretch in a direction away from the anti-peeping layer under the irradiation of the anti-peeping light source, and the color-changing film layer can change to a dark color under the irradiation of the anti-peeping light source.

[0019] In one embodiment, the material of the stretchable film layer is at least one of graphene oxide liquid crystal network composite materials, epoxy azo polymers, and hydrogen bond cross-linked liquid crystal elastomers; and / or the material of the color-changing film layer is at least one of spiropyran and salicylaldehyde.

[0020] In one embodiment, the anti-peeping layer includes an anti-peeping light source, which is arranged corresponding to the telescopic film layer and the color-changing film layer, and is electrically connected to the first electrode layer; the display panel also includes a second electrode layer, which is arranged between the anti-peeping unit and the anti-peeping layer, and is electrically connected to the first electrode layer; in the anti-peeping mode, the anti-peeping light source is turned on under the action of the voltage of the first electrode, the telescopic film layer can expand and stretch in a direction away from the anti-peeping layer under the action of the voltage of the second electrode layer, and the color-changing film layer can become dark under the action of the voltage of the second electrode layer.

[0021] In one embodiment, the material of the stretch film layer is carbon nanotubes; and / or the material of the color-changing film layer is at least one of quantum dot metal oxides and nanographene derived materials.

[0022] In one embodiment, the display panel further includes a pixel definition layer, which is disposed in the accommodating space and located on a side of the anti-peeping unit facing away from the anti-peeping layer.

[0023] In one embodiment, the light-emitting unit includes a stacked light-emitting bottom electrode layer, a light-emitting layer and a light-emitting top electrode layer, two adjacent light-emitting units are connected through the light-emitting top electrode layer, and two adjacent light-emitting units and the light-emitting top electrode layer therebetween jointly define the accommodating space.

[0024] The present invention further provides a display device, which includes the display panel as described above.

[0025] According to the technical solution of the present invention, the display panel includes a substrate, a first electrode layer, an anti-peeping layer, a plurality of light-emitting units, a plurality of anti-peeping units and a colored photoresist layer, wherein the first electrode layer is arranged on a surface of the substrate; the anti-peeping layer is arranged on a surface of the first electrode layer facing away from the substrate; a plurality of light-emitting units are arranged at intervals on a surface of the anti-peeping layer facing away from the first electrode layer and are connected, and an accommodation space is defined between two adjacent light-emitting units; a plurality of anti-peeping units are correspondingly arranged in the accommodation space and are located on a surface of the anti-peeping layer facing away from the first electrode layer; the colored photoresist layer is arranged on a side of the light-emitting unit facing away from the anti-peeping layer, the colored photoresist layer includes staggered colored photoresists and a black matrix, and the black matrix is ​​arranged corresponding to the anti-peeping units; the anti-peeping layer can emit anti-peeping light under the control of the first electrode layer, so that the display panel is in an anti-peeping mode, and the anti-peeping unit can become dark and expand and deform in the anti-peeping mode, so that the anti-peeping light emitted by the anti-peeping light source is refracted and emitted through the colored photoresist. The present invention utilizes the first electrode layer to freely control the realization of the anti-peeping mode, and in the anti-peeping mode, the anti-peeping unit becomes dark and expands and deforms, so that the anti-peeping light emitted by the anti-peeping layer is refracted, and after refraction, it is emitted through the colored photoresist, and the wide-viewing angle light emitted thereby is mixed with the colored photoresist, thereby reducing the display effect of the wide viewing angle, that is, the brightness under the wide viewing angle is reduced, and the purpose of anti-peeping is achieved; and, since the anti-peeping unit is arranged in the accommodating space between two adjacent light-emitting units, it will not affect the light output at a normal viewing angle, that is, it will not affect the screen brightness at a normal viewing angle; at the same time, the anti-peeping layer and the anti-peeping unit are integrated in the display panel, and will not affect the overall thickness of the display panel. Therefore, the display panel of the present invention achieves the anti-peeping effect without changing the overall thickness of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of an embodiment of a display panel provided by the present invention in a non-peeping mode;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the display panel in anti-peeping mode;

[0029] Figure 3 for Figure 1 A schematic diagram of the structure of the display panel from another perspective;

[0030] Figure 4 A schematic diagram of the structure of another embodiment of the display panel provided by the present invention in a non-peeping mode;

[0031] Figure 5 for Figure 4 A schematic diagram of the structure of the display panel in anti-peeping mode;

[0032] Figure 6 for Figure 1 Schematic diagram of the structure of the display panel from another perspective.

[0033] Description of Figure Numbers:

[0034] 1000, display panel; 110, substrate; 120, first electrode layer; 130, anti-peep layer; 131, anti-peep light source; 132, light board; 140, light-emitting unit; 141, light-emitting bottom electrode; 142, light-emitting layer; 143, light-emitting top electrode; 144, accommodating space; 150, anti-peep unit; 151a, photostrictive film layer; 151b, electrostrictive film layer; 152a, photochromic film layer; 152b, electrochromic film layer; 153, collimating optical film; 160, color photoresist layer; 161, color photoresist; 162, black matrix; 170, pixel definition layer; 180, second electrode layer; 190, connection perforation.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention proposes a display panel 1000, which is an OLED display panel 1000, and is intended to realize a freely controllable anti-peeping function without affecting the screen brightness at a normal viewing angle.

[0040] See also Figures 1 to 6 In one embodiment of the present invention, the display panel 1000 includes a substrate 110, a first electrode layer 120, an anti-peeping layer 130, a plurality of light-emitting units 140, a plurality of anti-peeping units 150 and a color photoresist layer 160, wherein the first electrode layer 120 is disposed on a surface of the substrate 110; the anti-peeping layer 130 is disposed on a surface of the first electrode layer 120 that is opposite to the substrate 110; the plurality of light-emitting units 140 are disposed at intervals on a surface of the anti-peeping layer 130 that is opposite to the first electrode layer 120 and are connected to each other, and an accommodation space 144 is defined between two adjacent light-emitting units 140; and the plurality of anti-peeping units 150 are correspondingly disposed in the accommodation space 144. The color photoresist layer 160 is disposed on the side of the light-emitting unit 140 facing away from the anti-peeping layer 130, and the color photoresist layer 160 includes staggered color photoresists 161 and a black matrix 162, and the black matrix 162 is disposed corresponding to the anti-peeping unit 150; the anti-peeping layer 130 can emit anti-peeping light under the control of the first electrode layer 120, so that the display panel 1000 is in the anti-peeping mode, and the anti-peeping unit 150 can become dark and expand and deform in the anti-peeping mode, so that the anti-peeping light emitted by the anti-peeping light source 131 is refracted and emitted through the color photoresist 161.

[0041] Specifically, the substrate 110 may be a transparent substrate 110, such as a glass substrate 110, which is used to deposit and form a first electrode layer 120. The first electrode layer 120 is made of a conductive material and can be applied with a positive voltage or a negative voltage. The color photoresist layer 160 is an RGB photoresist layer. The color photoresist layer 160 is a conventional setting, and the specific structural setting can refer to the prior art. The light-emitting unit 140 corresponds to the color photoresist 161 of the color photoresist layer 160, which is used for emitting light at a normal viewing angle. The anti-peeping unit 150 is set in the accommodating space 144 between two adjacent light-emitting units 140, and the anti-peeping unit 150 corresponds to the black matrix 162 of the color photoresist layer 160. In this way, the non-luminous area can be well utilized to achieve an anti-peeping effect, and the anti-peeping effect is relatively high. When no voltage is applied to the first electrode layer 120, the display panel 1000 is in a non-peeping mode. At this time, the anti-peeping layer 130 does not emit anti-peeping light, the anti-peeping function is not turned on, and the light-emitting unit 140 can display normally under both normal viewing angles and wide viewing angles; when a voltage is applied to the first electrode layer 120, the anti-peeping layer 130 can emit anti-peeping light under the control of the first electrode layer 120, so that the display panel 1000 is in an anti-peeping mode. In the anti-peeping mode, the anti-peeping unit 150 becomes dark and expands and deforms. At this time, the anti-peeping light emitted by the anti-peeping layer 130 irradiates the anti-peeping unit 150 and is refracted, and is emitted by the colored photoresist 161. The wide viewing angle light emitted thereby is mixed with the colored photoresist 161, thereby reducing the display effect of the wide viewing angle and achieving the purpose of anti-peeping.

[0042] It should be noted that the specific structure and material of the anti-peeping unit 150 are not limited, as long as it can achieve variable dark color and expansion, elongation and deformation to reduce the display effect of a large viewing angle.

[0043] According to the technical solution of the present invention, the first electrode layer 120 can be freely controlled to realize the anti-peeping mode, and in the anti-peeping mode, the anti-peeping unit 150 becomes dark and expands and deforms, so that the anti-peeping light emitted by the anti-peeping layer 130 is refracted and emitted through the colored photoresist 161 after refraction, and the large viewing angle light emitted thereby is mixed with the colored photoresist 161, thereby reducing the display effect of the large viewing angle, that is, the brightness under the large viewing angle is reduced, and the purpose of anti-peeping is achieved; and, since the anti-peeping unit 150 is arranged in the accommodating space 144 between two adjacent light-emitting units 140, it will not affect the light emission of the normal viewing angle, that is, it will not affect the screen brightness of the normal viewing angle; at the same time, the anti-peeping layer 130 and the anti-peeping unit 150 are integrated in the display panel 1000, and will not affect the overall thickness of the display panel 1000. Therefore, the display panel 1000 of the present invention achieves the anti-peeping effect without changing the thickness of the display panel 1000.

[0044] Please refer again Figures 1 to 6In one embodiment of the present invention, the privacy protection unit 150 includes a telescopic film layer, a color-changing film layer and a collimating optical film sheet 153. The telescopic film layer is arranged on the surface of the privacy protection layer 130 facing away from the first electrode layer 120 in the accommodating space 144, and can expand and stretch in a direction away from the privacy protection layer 130 in the privacy protection mode; the color-changing film layer is arranged on both sides of the telescopic film layer in the accommodating space 144, and can be changed to a dark color in the privacy protection mode; the collimating optical film sheet 153 is arranged on the side of the telescopic film layer facing away from the privacy protection layer 130, and is deformed from a straight shape to a bent shape under the expansion and extension of the telescopic film layer, so that the privacy protection light emitted by the privacy protection layer 130 is refracted and emitted through the color photoresist 161.

[0045] Specifically, the telescopic film layer is disposed in the middle of the surface of the anti-peeping layer 130 facing away from the first electrode layer 120 in the accommodating space 144. In the anti-peeping mode, the telescopic film layer expands and stretches in a direction away from the anti-peeping layer 130. The color-changing film layer is located on both sides of the telescopic film layer and is symmetrically distributed. In the anti-peeping mode, the color-changing film layer changes from a transparent layer to a dark layer. The collimating optical film 153 is used for light transmission. The collimating optical film 153 is straight in the non-peeping mode and is arranged on the surface of the telescopic film layer and the color-changing film layer facing away from the anti-peeping layer 130, and can transmit light normally. The collimating optical film 153 can be a multi-segment structure or a bendable and deformable structure. In the anti-peeping mode, the collimating optical film 153 is deformed by the support force of the telescopic film layer, and is deformed from the original straight shape to a bent shape. The light emitted by the anti-peeping layer 130 shines through the color-changing film layer and then shines on the deformed collimating optical film 153, causing refraction, and is emitted by the colored photoresist 161. The wide-viewing angle light emitted thereby is mixed with the colored photoresist 161. Since the color-changing film layer is dark, the display effect of the wide-viewing angle can be effectively reduced.

[0046] It should be noted that the specific structure and material of the telescopic film layer are not limited, as long as it can achieve expansion and extension, the telescopic film layer can be made of photodeformable materials or electrodeformable materials. The specific structure and material of the color-changing film layer are not limited, as long as it can achieve the transformation between transparent color and dark color, the color-changing film layer can be made of photochromic materials or photochromic materials.

[0047] In an optional embodiment of the present invention, under the expansion and elongation of the telescopic film layer, the collimating optical film 153 is deformed from a straight shape to a vertex shape, a cone shape or a semicircular shape.

[0048] In a specific embodiment, the collimating optical film 153 includes two connected sections. In the anti-peeping mode, the collimating optical film 153 is deformed by the support force of the telescopic film layer, and is deformed from an original straight shape to a vertex shape. Such a structure is simple and has a low manufacturing cost.

[0049] In other specific embodiments, the collimating optical film 153 includes three connected sections. In the anti-peeping mode, the collimating optical film 153 is deformed by the support force of the telescopic film layer, and the original straight shape is deformed into a cone shape. Alternatively, the collimating optical film 153 includes three connected sections, and the middle section is semicircular. In the anti-peeping mode, the collimating optical film 153 is deformed by the support force of the telescopic film layer, and the original straight shape is deformed into a semicircular shape.

[0050] Of course, the collimating optical film 153 may also include more than three connected sections, and the shape of each section is not limited, that is, the shape of the collimating optical film 153 after bending and deformation is not limited, as long as it can refract the anti-peeping light to a wide viewing angle and mix it with the colored photoresist 161 to reduce the display effect at a wide viewing angle.

[0051] See also Figures 1 to 3 In one embodiment of the present invention, the anti-peeping layer 130 includes an anti-peeping light source 131, which is arranged corresponding to the telescopic film layer and the color-changing film layer and is electrically connected to the first electrode layer 120; in the anti-peeping mode, the anti-peeping light source 131 is turned on under the voltage of the first electrode layer 120, and the telescopic film layer can expand and stretch in a direction away from the anti-peeping layer 130 under the irradiation of the anti-peeping light source 131, and the color-changing film layer can become dark under the irradiation of the anti-peeping light source 131.

[0052] In this embodiment, the telescopic film layer is a photostrictive film layer 151a, the color-changing film layer is a photochromic film layer 152a, and the anti-peeping light source 131 is set corresponding to the photostrictive film layer 151a and the photochromic film layer 152a. In the non-peeping mode, the anti-peeping light source 131 is in a closed state, the anti-peeping function is not turned on, and the light-emitting unit 140 can display normally under a large viewing angle; in the anti-peeping mode, under the voltage of the first electrode layer 120, the anti-peeping light source 131 is turned on, and the photochromic film layer 152a changes from transparent to dark under the irradiation of the anti-peeping light source 131. The photostrictive film layer 151a gradually expands and stretches in a direction away from the anti-peeping layer 130 under the irradiation of the anti-peeping light source 131, and the collimating optical film 153 is deformed by the support force of the photostrictive film layer 151a, and is deformed from the original straight shape to the vertex shape. At the same time, the anti-peep light emitted by the anti-peep light source 131 passes through the dark photochromic film layer 152a and illuminates the curved collimating optical film 153 to be refracted, and is emitted by the colored photoresist 161. The wide-viewing angle light emitted thereby is mixed with the colored photoresist 161. Since the photochromic film layer 152a is dark in color, the display effect of the wide viewing angle can be effectively reduced.

[0053] It should be noted that the principle of photochromism is: photochromism means that when a compound A is irradiated with light of a certain wavelength, a photochemical reaction can occur to obtain product B, and the colors of A and B (i.e., the absorption of light) are obviously different; at the same time, B can be restored to its original form A under the irradiation of another beam of light or after heating. This photochromic mechanism is determined by the characteristics of the material itself.

[0054] Optionally, the material of the photochromic film layer 152 a is at least one of spiropyran and salicylaldehyde.

[0055] The principle of photostrictive deformation is: photostrictive material is a smart material that deforms under the irradiation of light waves. The material of the photostrictive film layer 151a can be selected from at least one of graphene oxide liquid crystal network composite materials, epoxy azo polymers, and hydrogen bond cross-linked liquid crystal elastomers.

[0056] It can be understood that in this embodiment, the photochromic principle and the photodeformation principle are used to achieve the anti-peeping effect, that is, in the anti-peeping mode, the anti-peeping light source 131 is turned on under the voltage of the first electrode layer 120, and the photochromic film layer 152a is irradiated by the anti-peeping light source 131, and changes from transparent to dark color. The light passing through the dark photochromic film layer 152a is refracted to a large viewing angle by the bent and deformed photostrictive film layer 151a, and is emitted by the color photoresist 161, and mixed with the color photoresist 161, effectively reducing the display effect of the large viewing angle, and achieving the anti-peeping effect. In the non-anti-peeping mode, no voltage is applied to the first electrode layer 120, the anti-peeping light source 131 is turned off, the photochromic film layer 152a returns to its original transparent color, and the photostrictive film layer 151a returns to its original shape.

[0057] In one embodiment of the present invention, the anti-peeping layer 130 further includes a light board 132, which is disposed between the first electrode layer 120 and the light-emitting unit 140. The light board 132 is provided with a mounting groove on the surface facing the first electrode layer 120 and corresponding to the photochromic film layer 152a and the photostrictive film layer 151a, and the anti-peeping light source 131 is located in the mounting groove and is electrically connected to the first electrode layer 120. Optionally, the light board 132 is made of an optically homogeneous material, which can ensure that the direction of the light of the anti-peeping light source 131 is not affected during the transmission process.

[0058] See also Figures 4 to 6In another embodiment of the present invention, the anti-peeping layer 130 includes an anti-peeping light source 131, which is arranged corresponding to the telescopic film layer and the color-changing film layer, and is electrically connected to the first electrode layer 120; the display panel 1000 also includes a second electrode layer 180, which is arranged between the anti-peeping unit 150 and the anti-peeping layer 130, and is electrically connected to the first electrode layer 120; in the anti-peeping mode, the anti-peeping light source 131 is turned on under the voltage of the first electrode, the telescopic film layer can expand and stretch in a direction away from the anti-peeping layer 130 under the voltage of the second electrode layer 180, and the color-changing film layer can change to a dark color under the voltage of the second electrode layer 180.

[0059] In this embodiment, the telescopic film layer is an electrostrictive film layer 151b, the color-changing film layer is an electrochromic film layer 152b, and the anti-peeping light source 131 is arranged corresponding to the electrostrictive film layer 151b and the electrochromic film layer 152b. The second electrode layer 180 is made of a conductive material, and the second electrode layer 180 is arranged corresponding to the electrostrictive film layer 151b and the electrochromic film layer 152b, and is in contact with the electrostrictive film layer 151b and the electrochromic film layer 152b. The second electrode layer 180 is connected to the first electrode layer 120 through the conductive layer in the connecting hole 190, and belongs to the same signal, and can be turned on at the same time when the anti-peeping mode is enabled. In the non-anti-peeping mode, no voltage is applied to the first electrode layer 120 and the second electrode layer 180, the anti-peeping light source 131 is in an off state, the anti-peeping function is not turned on, and the light-emitting unit 140 can display normally under a large viewing angle. In the anti-peeping mode, voltage is applied to the first electrode layer 120 and the second electrode layer 180 at the same time, the anti-peeping light source 131 is turned on under the voltage of the first electrode layer 120, the electrochromic film layer 152b changes from transparent to dark under the voltage of the second electrode layer 180, the electrostrictive film layer 151b gradually expands and stretches in the direction away from the anti-peeping layer 130 under the voltage of the second electrode layer 180, and the collimating optical film 153 is deformed by the support force of the electrostrictive film layer 151b, and deforms from the original straight shape to the vertex shape. At the same time, the anti-peeping light emitted by the anti-peeping light source 131 passes through the dark electrochromic film layer 152b and irradiates the bent collimating optical film 153, which is refracted and emitted by the color photoresist 161. The large viewing angle light emitted thereby is mixed with the color photoresist 161. Since the electrochromic film layer 152b is dark, the display effect of the large viewing angle can be effectively reduced.

[0060] It should be noted that electrochromism is a phenomenon in which the optical properties of a material (reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes under the action of an external electric field. In appearance, it manifests as a reversible change in color and transparency, which is determined by the material itself.

[0061] Optionally, the material of the electrochromic film layer 152 b is at least one of quantum dot metal oxide and nanographene derived material.

[0062] Electrostriction refers to the phenomenon that a dielectric undergoes elastic deformation in an electric field. Specifically, when a dielectric is placed in an electric field, its molecules become polarized. Along the direction of the electric field, the positive pole of one molecule connects with the negative pole of another molecule. Due to the mutual attraction between the positive and negative poles, the entire dielectric contracts in this direction until the elastic force inside it is balanced with the electric attraction. This is determined by the material itself.

[0063] Optionally, the material of the stretch film layer is carbon nanotubes.

[0064] It can be understood that in this embodiment, the electrochromic principle and the electrodeformation principle are used to achieve the anti-peeping effect, that is, in the anti-peeping mode, voltage is applied to the first electrode layer 120 and the second electrode layer 180 at the same time, the anti-peeping light source 131 is turned on under the voltage of the first electrode layer 120, and the electrochromic film layer 152b is changed from transparent to dark under the voltage of the second electrode layer 180. The light passing through the dark electrochromic film layer 152b is refracted to a large viewing angle by the bent and deformed electrostrictive film layer 151b, and is emitted by the color photoresist 161, and mixed with the color photoresist 161, effectively reducing the display effect of the large viewing angle, and achieving the anti-peeping effect. In the non-anti-peeping mode, no voltage is applied to the first electrode layer 120 and the second electrode layer 180, the anti-peeping light source 131 is turned off, the electrochromic film layer 152b is restored to the original transparent color, and the electrostrictive film layer 151b is restored to the original shape.

[0065] In one embodiment of the present invention, the anti-peeping layer 130 further includes a light board 132, which is disposed between the first electrode layer 120 and the light-emitting unit 140. The light board 132 is provided with a mounting groove on the surface facing the first electrode layer 120 and corresponding to the electrochromic film layer 152b and the electrostrictive film layer 151b, and the anti-peeping light source 131 is located in the mounting groove and is electrically connected to the first electrode layer 120. Optionally, the light board 132 is made of an optically homogeneous material, which can ensure that the direction of the light of the anti-peeping light source 131 is not affected during the transmission process.

[0066] It should be noted that the photochromic film layer 152a and the electrochromic film layer 152b in the above embodiment can be selected as dark photoresist materials, as long as the purpose of turning on the anti-peeping light source 131 is to reduce the display brightness at a wide viewing angle. Alternatively, the photochromic film layer 152a and the electrochromic film layer 152b are selected as transparent materials, and the anti-peeping light source 131 is adjusted to a dark light source, as long as the same anti-peeping effect can be achieved. Among them, dark refers to a grayscale lower than RGB, which can ensure that it can be black after mixing with the color photoresist 161.

[0067] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the display panel 1000 further includes a pixel definition layer 170 disposed on a side of the anti-peeping unit 150 facing away from the anti-peeping layer 130 in the accommodating space 144 .

[0068] Specifically, the pixel definition layer 170 fills the accommodating space 144 and may be an optically homogeneous film layer, which can ensure that the direction of the light of the anti-peeping light source 131 is not affected during the transmission process.

[0069] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the light-emitting unit 140 includes a stacked light-emitting bottom electrode 141 layer, a light-emitting layer 142 and a light-emitting top electrode 143 layer, and two adjacent light-emitting units 140 are connected by the light-emitting top electrode 143 layer, and the two adjacent light-emitting units 140 and the light-emitting top electrode 143 layer therebetween jointly define an accommodating space 144.

[0070] The light-emitting unit 140 is used to emit light. In the non-peeping mode, the light-emitting unit 140 can emit light and display at both normal viewing angles and wide viewing angles. In the peeping mode, the light-emitting unit 140 can display normally at normal viewing angles, but cannot display normally at wide viewing angles. The specific structure of the light-emitting unit 140 is a conventional setting, and specific reference may be made to the prior art. The accommodating space 144 is defined by two adjacent light-emitting units 140 and the light-emitting top electrode 143 layer therebetween. The shape of the accommodating space 144 can be selected as a trapezoid, a vertex shape, a semicircle or other reasonable shapes, and its internal size is not limited, as long as it can allow the telescopic film layer to telescope and the collimating optical film 153 to bend and deform.

[0071] Optionally, the shape of the accommodating space 144 is consistent with the shape of the collimating optical film 153 after bending and deformation, so that the inner wall of the accommodating space 144 is parallel to the surface of the collimating optical film 153, which is more conducive to avoiding scattering of the anti-peeping light source 131 and affecting the anti-peeping effect.

[0072] The present invention further proposes a display device, which includes a display panel 1000. The specific structure of the display panel 1000 refers to the above embodiment. Since the display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0073] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A first electrode layer is disposed on a surface of the substrate; An anti-peeping layer is arranged on a surface of the first electrode layer facing away from the substrate; A plurality of light-emitting units are arranged at intervals on a surface of the privacy protection layer facing away from the first electrode layer and are connected to each other, and an accommodation space is defined between two adjacent light-emitting units; A plurality of privacy protection units are correspondingly arranged in the accommodating space and located on a surface of the privacy protection layer facing away from the first electrode layer; A color photoresist layer is arranged on the side of the light-emitting unit facing away from the anti-peeping layer, the color photoresist layer comprises staggered color photoresists and a black matrix, and the black matrix is ​​arranged corresponding to the anti-peeping unit; The anti-peeping layer can emit anti-peeping light under the control of the first electrode layer, so that the display panel is in an anti-peeping mode. The anti-peeping unit can become dark and expand and deform in the anti-peeping mode, so that the anti-peeping light emitted by the anti-peeping layer is refracted and emitted through the color photoresist.

2. The display panel according to claim 1, wherein: The anti-peeping unit comprises: A telescopic film layer is disposed on a surface of the anti-peeping layer facing away from the first electrode layer in the accommodating space, and can expand and stretch in a direction away from the anti-peeping layer in the anti-peeping mode; A color-changing film layer, arranged on both sides of the telescopic film layer in the accommodating space, which can be changed to a dark color in the anti-peeping mode; The collimating optical film is arranged on the side of the telescopic film layer facing away from the anti-peeping layer, and deforms from a straight shape to a bent shape under the expansion and elongation of the telescopic film layer, so that the anti-peeping light emitted by the anti-peeping layer is refracted and emitted through the color photoresist.

3. The display panel according to claim 2, wherein: Under the expansion and extension action of the telescopic film layer, the collimating optical film is deformed from a straight shape to a vertex shape, a cone shape or a semicircular shape.

4. The display panel according to claim 2, wherein: The anti-peeping layer includes an anti-peeping light source, which is arranged corresponding to the telescopic film layer and the color-changing film layer and is electrically connected to the first electrode layer; In the anti-peeping mode, the anti-peeping light source is turned on under the action of the voltage of the first electrode layer, the telescopic film layer can expand and stretch in a direction away from the anti-peeping layer under the irradiation of the anti-peeping light source, and the color-changing film layer can change to a dark color under the irradiation of the anti-peeping light source.

5. The display panel according to claim 4, wherein: The material of the stretch film layer is at least one of a graphene oxide liquid crystal network composite material, an epoxy azo polymer, and a hydrogen bond cross-linked liquid crystal elastomer; and / or, The material of the color-changing film layer is at least one of spiropyran and salicylaldehyde.

6. The display panel according to claim 2, wherein: The anti-peeping layer includes an anti-peeping light source, which is arranged corresponding to the telescopic film layer and the color-changing film layer and is electrically connected to the first electrode layer; The display panel further includes a second electrode layer, which is disposed between the anti-peeping unit and the anti-peeping layer and is electrically connected to the first electrode layer; In the anti-peeping mode, the anti-peeping light source is turned on under the action of the voltage of the first electrode, the telescopic film layer can expand and stretch in the direction away from the anti-peeping layer under the action of the voltage of the second electrode layer, and the color-changing film layer can change to a dark color under the action of the voltage of the second electrode layer.

7. The display panel according to claim 6, wherein: The material of the stretch film layer is carbon nanotubes; and / or, The material of the color-changing film layer is at least one of quantum dot metal oxide and nanographene derived material.

8. The display panel according to any one of claims 1 to 7, characterized in that: The display panel further includes a pixel definition layer, which is arranged in the accommodating space and located on a side of the anti-peeping unit facing away from the anti-peeping layer.

9. The display panel according to any one of claims 1 to 7, characterized in that: The light-emitting unit includes a stacked light-emitting bottom electrode layer, a light-emitting layer and a light-emitting top electrode layer. Two adjacent light-emitting units are connected through the light-emitting top electrode layer, and the two adjacent light-emitting units and the light-emitting top electrode layer therebetween jointly define the accommodating space.

10. A display device, characterized in that: The display device includes the display panel described in any one of 1 to 9.

Images