Display panel and display device

Abstract

The present invention discloses a display panel and a display device, which relate to the field of display technology. The display panel includes a substrate, a first electrode layer, an anti-peeping layer, multiple light-emitting units, multiple anti-peeping units and a colored photoresist layer. The first electrode layer is arranged on the surface of the substrate; the anti-peeping layer is arranged on the surface of the first electrode layer; the multiple light-emitting units are arranged at intervals on the surface of the anti-peeping layer and are connected, and an accommodating space is defined between two adjacent light-emitting units; the anti-peeping units are correspondingly arranged in the accommodating space; the colored photoresist layer is arranged on the side of the light-emitting unit facing away from the anti-peeping layer, and its 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 light source is refracted and emitted through the colored photoresist. The technical solution of the present invention can realize free control of the anti-peeping function without changing the thickness of the display panel.

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 Diodes (OLEDs) are a popular new generation display product, boasting wide viewing angles exceeding 170°, providing excellent visual quality for screen sharing. However, some users prefer to hide their wide-viewing angle display information from others when browsing personal information or confidential business information. Traditional privacy-preventing display modes utilize privacy film shutter technology to achieve this effect, but this lacks control over the privacy function. Furthermore, the film's thickness affects the brightness of the light at normal viewing angles, significantly 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, which are intended to achieve free control of the anti-peeping function without affecting the screen brightness at a normal viewing angle.

[0004] To achieve the above-mentioned 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 provided on a surface of the first electrode layer facing away from the substrate;

[0008] a plurality of light-emitting units, spaced apart and connected to each other on a surface of the privacy protection layer facing away from the first electrode layer, with an accommodation space 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 colored photoresist layer, disposed on a side of the light-emitting unit facing away from the privacy protection layer, the colored photoresist layer comprising staggered colored photoresists and a black matrix, the black matrix being disposed corresponding to the privacy protection unit;

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

[0012] In one embodiment, the privacy protection unit includes:

[0013] a stretchable film layer, disposed on a surface of the privacy protection layer facing away from the first electrode layer in the accommodating space, and capable of expanding and stretching in a direction away from the privacy protection layer in the privacy protection mode;

[0014] a color-changing film layer, disposed on both sides of the telescopic film layer in the accommodating space, and capable of changing 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 privacy layer, and deforms from a straight shape to a curved shape under the expansion and elongation of the telescopic film layer, so that the privacy light emitted by the privacy layer is refracted and emitted through the colored light resist.

[0016] In one embodiment, under the expansion and extension action of the stretchable 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 stretchable 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 by 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 become dark 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 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.

[0020] In one embodiment, the anti-peeping layer includes an anti-peeping light source, which is arranged corresponding to the stretchable 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 by the voltage of the first electrode, the stretchable film layer can expand and stretch in a direction away from the anti-peeping layer under the voltage of the second electrode layer, and the color-changing film layer can change to a dark color under 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 privacy protection unit facing away from the privacy protection 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, and 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.

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

[0025] The technical solution of the present invention is that 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 color photoresist layer, the first electrode layer is arranged on a surface of the substrate; the anti-peeping layer is arranged on the surface of the first electrode layer facing away from the substrate; the plurality of light-emitting units are arranged at intervals on the surface of the anti-peeping layer facing away from the first electrode layer and are connected, and an accommodating space is defined between two adjacent light-emitting units; the plurality of anti-peeping units are correspondingly arranged in the accommodating space and are located on the surface of the anti-peeping layer facing away from the first electrode layer; the color photoresist layer is arranged on the side of the light-emitting unit facing away from the anti-peeping layer, the color photoresist layer includes staggered color 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 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 color 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 emitted through the colored photoresist after refraction. The wide-viewing angle light emitted thereby is mixed with the colored photoresist, thereby reducing the display effect at a wide viewing angle, that is, the brightness at a wide viewing angle is reduced, achieving the purpose of anti-peeping; 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0027] Figure 1 This is a schematic structural diagram of an embodiment of a display panel provided by the present invention in a non-privacy protection mode;

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

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

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

[0031] Figure 5 for Figure 4 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, privacy protection layer; 131, privacy protection light source; 132, light board; 140, light-emitting unit; 141, light-emitting bottom electrode; 142, light-emitting layer; 143, light-emitting top electrode; 144, accommodation space; 150, privacy protection 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 through-hole.

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

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall 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 under a certain specific posture. If the specific posture changes, the directional indications 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 for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such 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 mutually contradictory or cannot be implemented, it should be deemed that such a 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 achieve free control of an 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. The first electrode layer 120 is disposed on one surface of the substrate 110; the anti-peeping layer 130 is disposed on a surface of the first electrode layer 120 facing away from the substrate 110; the plurality of light-emitting units 140 are spaced apart and connected to each other on a surface of the anti-peeping layer 130 facing away from the first electrode layer 120, and define an accommodation space 144 between adjacent two 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 arranged 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 arranged 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 can be a transparent substrate 110, such as a glass substrate 110, which is used to deposit and form the 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. The specific structural setting can refer to the existing technology. 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 the 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 is refracted when it hits the anti-peeping unit 150 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 at a wide viewing angle and achieving the purpose of anti-peeping.

[0042] It should be noted that the specific structure and material of the privacy protection 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] The technical solution of the present invention utilizes the first electrode layer 120 to freely control the realization of 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. The wide-viewing angle light emitted thereby is mixed with the colored photoresist 161, thereby reducing the display effect at a wide viewing angle, that is, the brightness at a wide viewing angle is reduced, thereby achieving the purpose of anti-peeping; 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 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 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 an 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 stretchable film layer, a color-changing film layer, and a collimating optical film 153. The stretchable film layer is disposed on the surface of the privacy protection layer 130 facing away from the first electrode layer 120 within the accommodating space 144 and can expand and stretch away from the privacy protection layer 130 in the privacy protection mode. The color-changing film layers are disposed on both sides of the stretchable film layer within the accommodating space 144 and can change to a darker color in the privacy protection mode. The collimating optical film 153 is disposed on the side of the stretchable film layer facing away from the privacy protection layer 130 and deforms from a straight shape to a curved shape under the action of the expansion and extension of the stretchable film layer, so that the privacy protection light emitted by the privacy protection layer 130 is refracted and emitted through the colored photoresist 161.

[0045] Specifically, the stretchable film layer is positioned within the accommodating space 144, in the middle of the surface of the privacy layer 130 facing away from the first electrode layer 120. In privacy mode, the stretchable film layer expands and stretches away from the privacy layer 130. The color-changing film layers are symmetrically positioned on both sides of the stretchable film layer. In privacy mode, the color-changing film layers change from transparent to dark. The collimating optical film 153 is used to transmit light. The collimating optical film 153 is straight in the non-privacy mode and is arranged on the surface of the telescopic film layer and the color-changing film layer facing away from the privacy 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 privacy mode, the collimating optical film 153 is deformed by the support force of the telescopic film layer, and deformed from the original straight shape to a bent shape. The light emitted by the privacy layer 130 passes through the color-changing film layer and then hits 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 stretchable film layer are not limited; as long as it can achieve expansion and extension, the stretchable film layer can be made of either a photodeformable material or an electrodeformable material. The specific structure and material of the color-changing film layer are not limited; as long as it can achieve transition between transparent and dark colors, the color-changing film layer can be made of either a photochromic material or a photochromic material.

[0047] In an optional embodiment of the present invention, under the expansion and elongation of the stretchable 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 stretch film layer, from the original straight shape to the top angle shape. Such a structure is simple and the manufacturing cost is low.

[0049] In other specific embodiments, the collimating optical film 153 comprises three connected sections. In the privacy protection mode, the collimating optical film 153 is deformed by the support force of the stretch film layer, from its original straight shape to a conical shape. Alternatively, the collimating optical film 153 comprises three connected sections, with the middle section being semicircular. In the privacy protection mode, the collimating optical film 153 is deformed by the support force of the stretch film layer, from its original straight shape to a semicircular shape.

[0050] Of course, the collimating optical film 153 can 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-peep 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. The anti-peeping light source 131 is provided corresponding to the stretchable 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 by the voltage of the first electrode layer 120. The stretchable film layer can expand and stretch in a direction away from the anti-peeping layer 130 under the illumination of the anti-peeping light source 131, and the color-changing film layer can change to a darker color under the illumination of the anti-peeping light source 131.

[0052] In this embodiment, the stretchable film layer is a photostrictive film layer 151a, and the color-changing film layer is a photochromic film layer 152a. The privacy light source 131 is provided corresponding to the photostrictive film layer 151a and the photochromic film layer 152a. In the non-privacy mode, the privacy light source 131 is off, the privacy function is disabled, and the light-emitting unit 140 can display normally at a wide viewing angle. In the privacy mode, the privacy light source 131 is turned on by the voltage applied to the first electrode layer 120, and the photochromic film layer 152a changes from transparent to dark under the illumination of the privacy light source 131. Under the illumination of the privacy light source 131, the photostrictive film layer 151a gradually expands and stretches away from the privacy layer 130. The collimating optical film 153 is deformed by the support force of the photostrictive film layer 151a, changing from its original straight shape to a vertical angle. At the same time, the privacy light emitted by the privacy light source 131 passes through the dark photochromic film layer 152a and illuminates the curved collimating optical film 153, causing refraction, and then emitted by the colored photoresist 161. The thus emitted wide-viewing angle light mixes with the colored photoresist 161. Since the photochromic film layer 152a is dark, the display effect at a wide viewing angle can be effectively reduced.

[0053] It should be noted that the principle of photochromism is that when a compound A is exposed to light of a certain wavelength, a photochemical reaction occurs to produce product B. The colors of A and B (i.e., their absorption of light) are significantly different. At the same time, B can return to its original form A under the irradiation of another beam of light or by heating. This photochromic mechanism is determined by the properties 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 as follows: a photostrictive material is a smart material that deforms under the irradiation of light waves. The material of the photostrictive film layer 151a can be 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.

[0056] As will be appreciated, this embodiment utilizes the principles of photochromism and photodeformation to achieve an anti-peeping effect. Specifically, in anti-peeping mode, the anti-peeping light source 131 is turned on by the voltage applied to the first electrode layer 120. The photochromic film layer 152a is illuminated by the anti-peeping light source 131, changing from transparent to dark. Light passing through the dark photochromic film layer 152a is refracted by the bent and deformed photostrictive film layer 151a to a wide viewing angle, and is emitted by the colored photoresist 161, mixing with the color of the colored photoresist 161. This effectively reduces the display effect at wide viewing angles, achieving an anti-peeping effect. In 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 privacy protection layer 130 further includes a light board 132 disposed between the first electrode layer 120 and the light-emitting unit 140. Mounting grooves are provided on the surface of the light board 132 facing the first electrode layer 120 and corresponding to the photochromic film layer 152a and the photostrictive film layer 151a. The privacy protection light source 131 is located within the mounting grooves and electrically connected to the first electrode layer 120. Optionally, the light board 132 is made of an optically homogeneous material to ensure that the direction of light from the privacy protection light source 131 is not affected during transmission.

[0058] See also Figures 4 to 6In another embodiment of the present invention, the privacy protection layer 130 includes a privacy protection light source 131, which is provided corresponding to the stretch 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 provided between the privacy protection unit 150 and the privacy protection layer 130 and is electrically connected to the first electrode layer 120. In the privacy protection mode, the privacy protection light source 131 is turned on by the voltage of the first electrode layer, the stretch film layer can expand and stretch in a direction away from the privacy protection layer 130 under the voltage of the second electrode layer 180, and the color-changing film layer can change to a darker color under the voltage of the second electrode layer 180.

[0059] In this embodiment, the telescopic film layer is an electrostrictive film layer 151b, and the color-changing film layer is an electrochromic film layer 152b. The privacy light source 131 is provided 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 is provided corresponding to and 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 via a conductive layer within the connecting hole 190. They are connected to the same signal and can be turned on simultaneously when privacy mode is enabled. In non-privacy mode, no voltage is applied to the first electrode layer 120 or the second electrode layer 180, the privacy light source 131 is off, the privacy function is disabled, and the light-emitting unit 140 can display normally at a wide viewing angle. In privacy mode, voltage is applied simultaneously to the first and second electrode layers 120, 180. The voltage from the first electrode layer 120 turns on the privacy light source 131, and the electrochromic film 152b changes from transparent to dark due to the voltage from the second electrode layer 180. The electrostrictive film 151b gradually expands and stretches away from the privacy layer 130 under the voltage from the second electrode layer 180. The collimating optical film 153, supported by the electrostrictive film 151b, deforms from its original straight shape to an angled shape. Simultaneously, the privacy light emitted by the privacy light source 131 passes through the dark electrochromic film 152b and strikes the curved collimating optical film 153, where it is refracted and emitted by the colored photoresist 161. The resulting wide-angle light mixes with the colored photoresist 161. Due to the dark color of the electrochromic film 152b, the wide-angle display effect is 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 152b is at least one of quantum dot metal oxide and nanographene derivative material.

[0062] Electrostriction refers to the phenomenon in which 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 stretch film layer is made of carbon nanotubes.

[0064] As will be appreciated, in this embodiment, the anti-peeping effect is achieved by utilizing the electrochromic and electrodeformation principles. Specifically, in the anti-peeping mode, voltage is simultaneously applied to the first electrode layer 120 and the second electrode layer 180. The voltage applied to the first electrode layer 120 turns on the anti-peeping light source 131, and the voltage applied to the second electrode layer 180 causes the electrochromic film layer 152b to change from transparent to dark. Light passing through the dark electrochromic film layer 152b is refracted by the bent and deformed electrostrictive film layer 151b to a wide viewing angle, and then emitted by the colored photoresist 161, mixing with the colored photoresist 161. This effectively reduces the wide viewing angle display effect, achieving the anti-peeping effect. In the non-anti-peeping mode, no voltage is applied to either the first electrode layer 120 or the second electrode layer 180, the anti-peeping light source 131 turns off, the electrochromic film layer 152b returns to its original transparent color, and the electrostrictive film layer 151b returns to its original shape.

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

[0066] It should be noted that the photochromic film layer 152a and the electrochromic film layer 152b in the above embodiment can be made of a dark-colored photoresist material, as long as the purpose of reducing the display brightness at a wide viewing angle when the anti-peeping light source 131 is activated is achieved. Alternatively, the photochromic film layer 152a and the electrochromic film layer 152b can be made of transparent materials, and the anti-peeping light source 131 can be set to a dark-colored light source, as long as the same anti-peeping effect is achieved. The dark color refers to a grayscale lower than RGB, ensuring that it can produce black when mixed 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 privacy protection unit 150 facing away from the privacy protection layer 130 within 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. 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 non-peeping mode, the light-emitting unit 140 can emit light and display at both normal viewing angles and wide viewing angles. In anti-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 can be made to the existing technology. 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, an apex shape, a semicircle, or other reasonable shapes. Its internal dimensions are not limited, as long as it can accommodate the expansion and contraction of the telescopic film layer and the bending and deformation of the collimating optical film 153.

[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 preventing the anti-peeping light source 131 from scattering and affecting the anti-peeping effect.

[0072] The present invention also proposes a display device, which includes a display panel 1000. The specific structure of the display panel 1000 refers to the above embodiment. Since this 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 merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is 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 provided on a surface of the first electrode layer facing away from the substrate; a plurality of light-emitting units, spaced apart and connected to each other on a surface of the privacy protection layer facing away from the first electrode layer, with an accommodation space 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 colored photoresist layer, disposed on a side of the light-emitting unit facing away from the privacy protection layer, the colored photoresist layer comprising staggered colored photoresists and a black matrix, the black matrix being disposed corresponding to the privacy protection unit; The privacy protection layer can emit privacy protection light under the control of the first electrode layer, so that the display panel is in the privacy protection mode. The privacy protection unit can change to a dark color and expand and deform in the privacy protection mode, so that the privacy protection light emitted by the privacy protection layer is refracted and emitted through the color photoresist. The anti-peeping unit comprises: a stretchable film layer, disposed on a surface of the privacy protection layer facing away from the first electrode layer in the accommodating space, and capable of expanding and stretching in a direction away from the privacy protection layer in the privacy protection mode; a color-changing film layer, disposed on both sides of the telescopic film layer in the accommodating space, and capable of changing 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 privacy layer, and deforms from a straight shape to a curved shape under the expansion and elongation of the telescopic film layer, so that the privacy light emitted by the privacy layer is refracted and emitted through the colored light resist.

2. The display panel according to claim 1, 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.

3. The display panel according to claim 1, 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 by 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 become dark under the irradiation of the anti-peeping light source.

4. The display panel according to claim 3, 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.

5. The display panel according to claim 1, 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 by the voltage of the first electrode, the stretchable film layer can expand and stretch in the direction away from the anti-peeping layer by the voltage of the second electrode layer, and the color-changing film layer can change to a dark color by the voltage of the second electrode layer.

6. The display panel according to claim 5, 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 derivative material.

7. The display panel according to any one of claims 1 to 6, wherein: The display panel further includes a pixel definition layer, which is arranged in the accommodating space and located on a side of the privacy protection unit facing away from the privacy protection layer.

8. The display panel according to any one of claims 1 to 6, wherein: 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.

9. A display device, characterized in that: The display device includes the display panel described in any one of 1 to 8.

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