CN117715475A

CN117715475A - Peep-proof display screen and electronic equipment

Info

Publication number: CN117715475A
Application number: CN202310988979.7A
Authority: CN
Inventors: 汪博; 张正川; 赵明远; 刘昆
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2024-03-15

Abstract

The application provides a peep-proof display screen and electronic equipment, peep-proof display screen is including the base plate, OLED device layer and the encapsulation layer of range upon range of in proper order, a plurality of pixels of array arrangement in the OLED device layer, and pixel is through pixel opening to the light that goes out. Through setting up the peep-proof layer on the packaging layer, the peep-proof layer includes basic light-absorbing layer and flat layer, and a plurality of first openings of array arrangement are seted up to basic light-absorbing layer, and each first opening corresponds with each pixel opening, and flat layer covers on basic light-absorbing layer to realize the planarization of peep-proof layer. Therefore, the basic light absorption layer is arranged around the periphery of each pixel opening, the pixel openings are not blocked, and large-angle light rays emitted from the pixel openings can be absorbed through the basic light absorption layer, and small-view light emission of the pixel openings is not affected, so that the peep-proof function of the peep-proof display screen is realized. In addition, the peep-proof layer has simple structure and small thickness, does not influence the whole thickness of the peep-proof display screen, and can realize the thinning of the electronic equipment.

Description

Peep-proof display screen and electronic equipment

Technical Field

The application relates to the field of electronic equipment, in particular to a peep-proof display screen and electronic equipment.

Background

With the development of technology, privacy security problems of electronic consumer products (such as mobile phones, tablet computers and the like) are receiving increasing attention. In some situations, a user needs a display screen of the device to have a narrower viewing angle, so that surrounding people cannot observe the content displayed by the display screen, and the display screen is hoped to have a peep-proof function.

In the prior art, a peep-proof film (such as a shutter array die) can be added on a display screen, and light rays with a large visual angle are filtered through the peep-proof film, so that only small-angle light rays under a front view angle are reserved, and other people at the position with the large visual angle cannot observe contents displayed by the display screen. However, the thickness of the conventional peep-proof film is usually larger, which increases the thickness of the device and is not beneficial to the thin design of the device.

Disclosure of Invention

The utility model provides a peep-proof display screen and electronic equipment, peep-proof display screen can realize peep-proof function, and thickness is little, is favorable to frivolous the thinning of electronic equipment.

An aspect of the present application provides a privacy display, including: the OLED device comprises a substrate, an OLED device layer, a packaging layer and a peep-proof layer, wherein the OLED device layer and the packaging layer are sequentially stacked on the substrate;

the OLED device layer is provided with a plurality of pixels in an array manner, the peep-proof layer comprises a basic light absorption layer and a flat layer, the basic light absorption layer is provided with a plurality of first openings in an array manner, each first opening faces to a pixel opening of each pixel, and the flat layer covers the basic light absorption layer; the basic light absorption layer can absorb light rays emitted by corresponding pixels.

The peep-proof display screen comprises a substrate, an OLED device layer and a packaging layer which are sequentially stacked, wherein a plurality of pixels are arranged in the OLED device layer in an array mode, and the pixels emit light to the outside through pixel openings. Through setting up the peep-proof layer on the packaging layer, the peep-proof layer includes basic light-absorbing layer and flat layer, and a plurality of first openings of array arrangement are seted up to basic light-absorbing layer, and each first opening corresponds with each pixel opening, and flat layer covers on basic light-absorbing layer to realize the planarization of peep-proof layer. Therefore, the basic light absorption layer is arranged around the periphery of each pixel opening, the pixel openings are not blocked, and large-angle light rays emitted from the pixel openings can be absorbed through the basic light absorption layer, and small-view light emission of the pixel openings is not affected, so that the peep-proof function of the peep-proof display screen is realized. In addition, the peep-proof layer has simple structure and small thickness, does not influence the whole thickness of the peep-proof display screen, and can realize the thinning of the electronic equipment.

In one possible embodiment, the basic light absorbing layer includes a light shielding layer that is opaque.

The base light absorption layer is arranged to be the light shielding layer, the light shielding layer is opaque, light rays of all colors can be absorbed, large-angle light rays emitted by corresponding pixels can be absorbed, and the peep-proof function of the peep-proof display screen is realized. The same shading layer can be arranged on pixels with different colors, and the shading layer can be of a net-shaped integrated structure.

In one possible embodiment, the basic light absorbing layer includes a filter layer, the color of the filter layer being different from the color of the corresponding pixel, and the filter layer being used to absorb light emitted from the corresponding pixel.

Through setting up basic extinction layer as the filter layer, and the colour of filter layer is different with the colour of corresponding pixel, and the wide-angle light that the pixel sent is absorbed by corresponding shading layer, realizes peeping-proof function of peeping-proof display screen. Because the colors of the filter layers surrounding the periphery of the pixels with different colors are different, the whole basic light absorption layer can be formed by splicing a plurality of filter layers with different colors which are arrayed.

In a possible embodiment, the difference between the center-to-edge distance of the first opening and the center-to-edge distance of the pixel opening is-1 μm-3 μm.

In one possible embodiment, the privacy layer further comprises a transparent first spacer layer disposed over the encapsulation layer and the basic light absorbing layer is disposed over the first spacer layer.

Through setting up first isolation layer on the packaging layer, set up basic light-absorbing layer on first isolation layer, increase the interval between basic light-absorbing layer and the OLED device to ensure that basic light-absorbing layer is located on the light path of the wide-angle light that the pixel sent, guarantee that basic light-absorbing layer can effectively play a role. The first isolation layer is transparent, so that light emitted by the pixels can penetrate through the first isolation layer to prevent the first isolation layer from affecting the light emission of the pixels and avoid affecting the light transmittance of the peep-proof display screen.

In one possible embodiment, the thickness of the first spacer layer is 8 μm to 20 μm.

Through setting the thickness of the first isolation layer between 8 mu m and 20 mu m, the first isolation layer is ensured to have enough thickness so as to ensure that the distance between the basic light absorption layer and the OLED device is controlled in a proper range, and the thickness of the first isolation layer is prevented from being too large so as to prevent the influence on the whole thickness of the peep-proof display screen.

In one possible embodiment, the first barrier layer is a clear ink layer.

In one possible implementation, the peep-proof display screen further includes a touch layer, the touch layer covers the encapsulation layer, and the first isolation layer is disposed on the touch layer.

By covering the touch layer on the packaging layer, when a user touches the peep-proof display screen, the touch layer can generate a touch signal, and the touch function of the electronic equipment can be realized.

In one possible embodiment, the peep-proof layer further comprises a high-refraction layer, the high-refraction layer is located above the packaging layer, the first isolation layer covers the high-refraction layer, and the refractive index of the high-refraction layer is higher than that of the first isolation layer;

the high folding layer comprises a plurality of high folding parts which are arranged in an array manner, and each high folding part is opposite to each pixel opening; the top surface edge of the high-refraction part is provided with a light-gathering area, at least part of the light-gathering area is exposed in the first opening, and the light-gathering area is an arc surface protruding towards the periphery of the high-refraction part.

The high-folding layer is arranged on the packaging layer, and a plurality of high-folding parts which are arranged in an array mode and correspond to the pixel openings one by one are arranged in the high-folding layer, so that the first isolation layer covers the high-folding layer. By making the refractive index of the high refractive layer larger than that of the first isolation layer and setting the top surface edge of the high refractive layer as an arc surface protruding towards the periphery, the arc surface forms a light-gathering area, so that light transmitted to the light-gathering area can be refracted at the interface between the high refractive layer and the first isolation layer to form light rays with small angles and be emitted from the first opening of the basic light absorption layer. Therefore, the light-emitting loss of the pixels is reduced, the light-emitting proportion of the small angle is increased, and the front brightness of the peep-proof display screen can be improved.

In one possible embodiment, the high-refraction portion is a light-filtering portion, and the color of the light-filtering portion is the same as the color of the corresponding pixel.

Through setting the high portion of folding over to the same filter unit with the colour of corresponding pixel, the high portion of folding over can absorb the wide-angle light that other colours's pixel sent around to play the effect of preventing light-crossing, light leakage between adjacent pixel, and, the high portion of folding over can also absorb the light of other colours of external world, reduces the reflectivity of peeping-proof display screen.

In one possible implementation manner, the touch layer is provided with a plurality of second openings arranged in an array, each second opening faces each pixel opening, the first isolation layer covers the touch layer and fills each second opening, and the refractive index of the touch layer is lower than that of the first isolation layer.

The touch layer is provided with a plurality of second openings which are arranged in an array and correspond to the pixel openings, the refractive index of the touch layer is lower than that of the first isolation layer, and partial large-angle light rays transmitted to the side wall of the second opening of the touch layer can be totally reflected at the interface of the first isolation layer and the touch layer to form small-angle light rays, so that the luminous loss of the pixels is reduced, and the front brightness of the peep-proof display screen is improved.

In one possible embodiment, the privacy layer further comprises a second barrier layer and a first lower layer;

the touch layer is provided with a plurality of second openings which are arranged in an array, each second opening is opposite to each pixel opening, the second isolation layer covers the touch layer and fills each second opening, and the refractive index of the touch layer is lower than that of the second isolation layer;

the first low-refraction layer covers the second isolation layer, the first low-refraction layer is provided with a plurality of third openings which are arranged in an array, each third opening is opposite to each pixel opening, the first isolation layer covers the first low-refraction layer and fills each third opening, and the refractive index of the first low-refraction layer is lower than that of the first isolation layer.

The second isolation layer covers the touch layer and fills each second opening of the touch layer, and the first low-refraction layer covers the second isolation layer and is provided with a plurality of third openings which are arranged in an array and correspond to each pixel opening. The refractive index of the touch control layer is lower than that of the second isolation layer, the refractive index of the first low-refractive layer is lower than that of the first isolation layer, and the interfaces between the second isolation layer and the touch control layer and between the first isolation layer and the first low-refractive layer can fully reflect partial large-angle light rays emitted by the pixels, so that the luminous loss of the pixels can be further reduced, and the front-view brightness of the peep-proof display screen is further improved.

In one possible implementation manner, the peep-proof display screen further comprises an optical adhesive layer, a circular polarizer and a cover plate, and the optical adhesive layer, the circular polarizer and the cover plate are sequentially laminated on the peep-proof layer.

In one possible implementation manner, the peep-proof layer further includes a color photoresist layer, the color photoresist layer includes a plurality of photoresist portions arranged in an array, each of the photoresist portions is disposed corresponding to each of the first openings, and a color of each of the photoresist portions is the same as a color of a corresponding pixel.

Through setting up the color photoresist layer, make each light resistance portion of color photoresist layer correspond with each first opening of basic extinction layer, and the colour of each light resistance portion is the same with the colour of corresponding pixel, and light resistance portion can absorb external light of other colours, reduces the reflectivity of peep-proof display screen, promotes the contrast ratio of peep-proof display screen, and can absorb the wide-angle light of the pixel crosstalk of other colours around, plays the effect of preventing light-crossing, leak protection.

In one possible embodiment, each of the photoresist portions is filled in each of the first openings.

In one possible implementation, the peep-proof layer further includes a second low-refractive layer, the second low-refractive layer covers the basic light absorption layer and the side wall of each first opening, and the refractive index of the second low-refractive layer is lower than that of the color photoresist layer;

The second low-refraction layer is provided with a plurality of fourth openings, each fourth opening is positioned in each first opening, and each light resistance part is filled in each fourth opening.

And forming a second low-folding layer on the basic light absorption layer, opening a fourth opening at the part of the second low-folding layer in each first opening of the basic light absorption layer, and filling each photoresist part in each fourth opening. And the refractive index of the second low-refractive layer is lower than that of the color photoresist layer, and part of large-angle light rays emitted by the pixels can be refracted or totally reflected at the interface of the color photoresist layer and the second low-refractive layer to form small-angle light rays which can be emitted outwards, so that the luminous loss of the pixels is reduced, and the front brightness and the peep preventing effect of the peep preventing display screen are improved.

In one possible implementation manner, the peep-proof layer further comprises a third low-refraction layer, the third low-refraction layer is provided with a plurality of fifth openings, each fifth opening faces the pixel opening of each pixel, each light resistance part is filled in each fifth opening, and the basic light absorption layer is arranged on the third low-refraction layer.

And forming a third low-refraction layer, forming a plurality of fifth openings which are arranged in an array manner and correspond to the pixel openings on the third low-refraction layer, filling the photoresist parts of the color photoresist layer into the fifth openings, and arranging the basic light absorption layer on the third low-refraction layer. And the refractive index of the third low-refractive layer is lower than that of the color photoresist layer, and part of large-angle light rays emitted by the pixels can be refracted or totally reflected at the interface of the color photoresist layer and the third low-refractive layer to form small-angle light rays which can be emitted outwards, so that the luminous loss of the pixels is reduced, and the front brightness and the peep preventing effect of the peep preventing display screen are improved.

In one possible embodiment, the basic light absorbing layer includes a first filter layer having a color different from that of the corresponding pixel.

In one possible embodiment, the basic light absorbing layer further includes a second filter layer, the second filter layer covers the first filter layer, the second filter layer has a color different from a color of the corresponding pixel, and the second filter layer has a color different from the first filter layer.

In one possible embodiment, each of the photoresist portions extends out of the fifth opening and covers the third low-refraction layer, and the basic light absorption layer covers the photoresist portion.

In one possible embodiment, the peep-proof display screen further comprises an optical adhesive layer and a cover plate, and the optical adhesive layer and the cover plate are sequentially laminated on the peep-proof layer.

In one possible embodiment, the peep-proof display screen further comprises an additional light-absorbing layer, the additional light-absorbing layer is arranged on the light-emitting side of the pixel, and the additional light-absorbing layer is arranged on the side, facing the substrate, of the basic light-absorbing layer;

the additional light absorption layer is provided with a plurality of sixth openings which are arranged in an array mode, and orthographic projection of each sixth opening on the flat layer covers orthographic projection of each first opening on the flat layer.

The additional light absorption layer is additionally arranged between the OLED device and the basic light absorption layer, a plurality of sixth openings which are arranged in an array mode and correspond to the pixel openings are formed in the additional light absorption layer, so that the additional light absorption layer is positioned on an optical path of high-angle light rays of inter-pixel crosstalk, and the additional light absorption layer absorbs the high-angle light rays of the inter-pixel crosstalk to play roles of inter-pixel crosstalk prevention and light leakage prevention.

In a possible embodiment, the difference between the center-to-edge distance of the sixth opening and the center-to-edge distance of the pixel opening is 1 μm-6 μm.

In one possible embodiment, an additional light-absorbing layer is provided over the encapsulation layer, the first spacer layer covering the additional light-absorbing layer.

By arranging the additional light absorbing layer above the encapsulation layer and covering the additional light absorbing layer with the first isolation layer, a sufficient distance is provided between the additional light absorbing layer and the base light absorbing layer, so that the additional light absorbing layer can be blocked on the light path of the large-angle light rays of the adjacent pixel (which can cross talk to the pixel), and the additional light absorbing layer can be ensured to effectively play a role.

A second aspect of the present application provides an electronic device, including a housing and a peep-proof display screen as described above, where the peep-proof display screen is attached to the housing.

The application provides electronic equipment, including casing and the peeping-proof display screen of subsides dress on the casing, peeping-proof display screen is including the base plate, OLED device layer and the encapsulation layer of laminating in proper order, array arrangement has a plurality of pixels in the OLED device layer, and pixel is through the opening of pixel to the light that goes out. Through setting up the peep-proof layer on the packaging layer, the peep-proof layer includes basic light-absorbing layer and flat layer, and a plurality of first openings of array arrangement are seted up to basic light-absorbing layer, and each first opening corresponds with each pixel opening, and flat layer covers on basic light-absorbing layer to realize the planarization of peep-proof layer. Therefore, the basic light absorption layer is arranged around the periphery of each pixel opening, the pixel openings are not blocked, and large-angle light rays emitted from the pixel openings can be absorbed through the basic light absorption layer, and small-view light emission of the pixel openings is not affected, so that the peep-proof function of the peep-proof display screen is realized. In addition, the peep-proof layer has simple structure and small thickness, does not influence the whole thickness of the peep-proof display screen, and can realize the thinning of the electronic equipment.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 2 is an exploded view of the electronic device shown in fig. 1;

FIG. 3 is a schematic structural view of a LAF membrane according to the related art;

fig. 4 is a schematic structural diagram of a peep-proof display screen according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a peep-proof display screen according to a second embodiment of the present application;

fig. 6 is a schematic structural diagram of a peep-proof display screen according to a third embodiment of the present application;

fig. 7 is a schematic structural diagram of a peep-proof display screen according to a fourth embodiment of the present application;

fig. 8 is a schematic structural diagram of a peep-proof display screen according to a fifth embodiment of the present application;

fig. 9 is a schematic structural diagram of a peep-proof display screen according to a sixth embodiment of the present application;

fig. 10 is a schematic structural diagram of a peep-proof display screen according to a seventh embodiment of the present application;

fig. 11 is a schematic structural diagram of another peep-proof display screen according to the seventh embodiment of the present application;

fig. 12 is a schematic structural diagram of a peep-proof display screen according to an eighth embodiment of the present application;

fig. 13 is an optical simulation contrast diagram of the peep-proof display screen provided in the embodiment of the application.

Reference numerals illustrate:

1-an electronic device;

100-a display screen; 100 a-peep-proof display screen;

110-a substrate; a 120-OLED device layer; 130-an encapsulation layer; 140-a touch layer; 150-a peep-proof layer; 160-an optical cement layer; 170-a circular polarizer; 180-cover plate; 190-an additional light absorbing layer;

a 111-TFT driving layer; 121-a pixel definition layer; a 122-OLED device; 131-a first inorganic layer; 132-an organic layer; 133-a second inorganic layer; 141-a second opening; 151-a basic light absorbing layer; 151 a-a light shielding layer; 151 b-a filter layer; 152-a planar layer; 153-a first isolation layer; 154-high fold; 154 a-high fold; 155-a second isolation layer; 156-first lower ply; 157-color photoresist layer; 157 a-a photoresist portion; 158-a second lower ply; 159-third lower ply; 191-sixth opening;

1221-an anode layer; 1222-a functional layer; 1223-a cathode layer; 1511-a first opening; 1512-a first filter layer; 1513-a second filter layer; 1541-a light focusing region; 1561-third openings; 1581-fourth openings; 1591-fifth opening;

200-a housing;

210-middle frame; 220-a rear cover;

211-a middle plate portion; 212-a frame portion;

10-LAF membrane; 11-a peep-proof layer; 11 a-prisms; 12-a support layer; 13-a protective layer; 14-hardening layer.

Detailed Description

The terminology used in the description section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

The embodiment of the application provides electronic equipment which can be consumer electronic products. By way of example, electronic devices include, but are not limited to, cell phones, tablet computers (portable android device, PAD), noteBook computers (NoteBook Computer, abbreviated as NoteBook), ultra-mobile personal computers (ultra-mobile personal computer, UMPC), interphones, netbooks, POS (Point of sales) machines, personal digital assistants (personal digital assistant, PDA), wearable devices, virtual Reality (VR) devices, augmented reality (augmented reality, AR) devices, and the like.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Referring to fig. 1, taking an electronic device 1 as an example of a mobile phone, the electronic device 1 may include a display 100 and a housing 200. One side surface of the display screen 100 is used to display image information, and the side surface of the display screen 100 is generally defined as a front surface thereof, and the other side surface opposite to the front surface thereof is a rear surface thereof. The case 200 is disposed around the periphery and the back of the display screen 100, and is used for supporting and fixing the display screen 100 and providing protection. The front surface of the display screen 100 is exposed outside the case 200 for a user to view contents displayed on the display screen 100 or to perform input operations to the electronic apparatus 1.

Fig. 2 is an exploded structural view of the electronic device shown in fig. 1. Referring to fig. 2, the case 200 of the electronic device 1 may include a middle frame 210 and a rear cover 220, the middle frame 210 being connected between the display screen 100 and the rear cover 220, the display screen 100 being supported at one side surface of the middle frame 210, and the rear cover 220 being connected at the other side surface of the middle frame 210. The display screen 100 is generally integrally mounted on the middle frame 210, so as to ensure the strength and stability of the display screen 100, and meet the use requirement of the display screen 100. The rear cover 220 is generally connected to the middle frame 210 in a lap joint manner, and the middle frame 210 and the rear cover 220 together enclose a housing cavity, in which devices such as a circuit board, a battery, a camera, a microphone (circuit board, battery, camera, microphone are not shown in the drawing) and the like are mounted.

The middle frame 210 may include a middle plate portion 211 and a frame portion 212, the middle plate portion 211 is located between the display screen 100 and the rear cover 220 and is generally parallel to the display screen 100 and the rear cover 220, the frame portion 212 is disposed around the middle plate portion 211, and the frame portion 212 may be perpendicular to the plate surface of the middle plate portion 211 and extend to both sides of the middle plate portion 211, for example. Illustratively, the rim portion 212 and the middle plate portion 211 may be an integrally formed structure.

The display screen 100 is generally attached to the middle plate 211 of the middle frame 210 in an integrally attaching manner, for example, the display screen 100 is integrally adhered to the middle plate 211, and the display screen 100 can be stably and firmly supported by the middle plate 211 and supported by the display screen 100, so that the display screen 100 has enough strength to meet the use requirement of frequent pressing of the display screen 100. The frame 212 is disposed around the display screen 100 to protect the side of the display screen 100, so as to help the display screen 100 to resist collision, drop and other risk scenes and protect the display screen 100 from damage.

The edge of the rear cover 220 is coupled to the rim portion 212 of the middle frame 210, for example, the edge of the rear cover 220 is bonded to the rim portion 212. A space is provided between the middle plate portion 211 of the middle frame 210 and the rear cover 220, and the space forms a receiving cavity as described above to mount devices in the receiving cavity between the middle plate portion 211 of the middle frame 210 and the rear cover 220.

It should be noted that, the electronic device 1 shown in fig. 1 and fig. 2 is a bar-type electronic device, and specifically, the electronic device 1 is taken as an example of a bar-type mobile phone. In other embodiments, the electronic device 1 may also be a folder-type electronic device, for example, the electronic device 1 may be a folder-type mobile phone.

When the electronic device 1 is a foldable electronic device, the display screen 100 mounted on the electronic device 1 is a foldable display screen 100, and the display screen 100 may be made of a flexible material, in other words, the display screen 100 is a flexible screen, so that the display screen 100 has a bending deformation capability, and the display screen 100 is switched between a folded state and an unfolded state.

In either the bar-type electronic device or the folder-type electronic device, in some situations, for example, when the processing of private information and the processing of work content involve business confidentiality, inputting account passwords, or other private situations, the user wants the information displayed by the electronic device 1 to be unknown to other surrounding users, and at this time, the electronic device 1 needs to have a peep-proof function.

In order to make the display screen 100 of the electronic device 1 have a peep-proof function, in the related art, a peep-proof film may be attached to the display screen 100 of the electronic device 1 to adjust the light-emitting viewing angle of the display screen 100 through the peep-proof film, so as to achieve the peep-proof effect. At present, the peep-proof film commonly used in the market is mainly a shutter array film (Louver Array Film, abbreviated as LAF).

Fig. 3 is a schematic structural view of a LAF membrane in the related art. Referring to fig. 3, the most core structure layer of the LAF film 10 is a peep-proof layer 11, a plurality of prisms 11a are arranged on the peep-proof layer 11, and the distance between the adjacent prisms 11a is very small (similar to a shutter structure), so that only light rays with a small angle range, such as 50 ° range shown in the figure, can be transmitted to achieve the peep-proof effect. In addition, in order to support and protect the peep-proof layer 11, the two sides of the peep-proof layer 11 are further provided with a support layer 12, the material constituting the support layer 12 is, for example, polyethylene terephthalate (Polyethylene terephthalate, PET), the two sides of the support layer 12 are further provided with a protective layer 13, the material constituting the protective layer 13 is, for example, polyethylene (PE) for short, and a hardening layer 14 may be further provided between the support layer 12 and the protective layer 13 on the light emitting side of the peep-proof layer 11 to enhance the strength of the LAF film 10. Wherein, a glue layer (not shown) may be disposed between adjacent film layers in the LAF film 10, and each film layer is sequentially bonded together through the glue layer.

However, the thickness of the LAF film 10 is large due to the existence of the protective layer 13, the adhesive layer, and other film layers in the LAF film 10, and the thickness of the LAF film 10 is generally about 200 μm to 400 μm. Therefore, the LAF film 10 increases the thickness of the display 100, and cannot be applied to the thinned electronic device 1, and increases the production cost of the electronic device 1. In addition, the structure of the peep-proof layer 11 in the LAF film 10 for controlling the viewing angle is complex, and the current technology cannot directly apply the peep-proof layer 11 to the display screen 100 of the thinned product. In addition, the LAF film 10 has a certain influence on the light transmittance of the display screen 100 due to the large number of laminated film layers, and increases the power consumption of the electronic device 1 if the brightness of the display screen 100 is to be improved.

In view of this, the embodiment of the present application improves the display screen 100 mounted on the electronic apparatus 1, and sets the display screen 100 as a peep-proof display screen. The peep-proof display screen comprises a substrate, an OLED device layer and a packaging layer which are sequentially stacked, wherein a plurality of pixels are arranged in the OLED device layer in an array mode, and the pixels emit light to the outside through pixel openings. Through setting up the peep-proof layer on the packaging layer, the peep-proof layer includes basic light-absorbing layer and flat layer, and a plurality of first openings of array arrangement are seted up to basic light-absorbing layer, and each first opening corresponds with each pixel opening, and flat layer covers on basic light-absorbing layer to realize the planarization of peep-proof layer. Therefore, the basic light absorption layer is arranged around the periphery of each pixel opening, the pixel openings are not blocked, and large-angle light rays emitted from the pixel openings can be absorbed through the basic light absorption layer, and small-view light emission of the pixel openings is not affected, so that the peep-proof function of the peep-proof display screen is realized. In addition, the peep-proof layer has simple structure and small thickness, does not influence the whole thickness of the peep-proof display screen, and can realize the thinning of the electronic equipment 1.

Example 1

Fig. 4 is a schematic structural diagram of a peep-proof display screen according to an embodiment of the present application. Referring to fig. 4, in this embodiment, the peep-proof display screen 100a is an OLED (Organic Light-Emitting Diode) display screen 100, that is, the display module mounted in the peep-proof display screen 100a is an OLED display module.

Specifically, the OLED display module of the privacy display 100a may include a substrate 110 and an OLED device layer 120. The substrate 110 is located at the bottommost layer of the OLED display module, and is mainly used for supporting a structural layer thereon, so as to ensure the overall structural strength and stability of the peep-proof display screen 100 a. The OLED device layer 120 is disposed on the substrate 110, and the OLED device layer 120 is configured to emit light to enable the privacy display 100a to display an image.

The substrate 110 is used as a basic supporting structure, has a certain thickness, meets the requirements of structural strength, and has good barrier property to water vapor in the environment. Illustratively, the substrate 110 may be made of quartz, glass, resin, metal, etc., wherein the resin includes, but is not limited to, polymethyl methacrylate (poly (methyl methacrylate), abbreviated as PMMA), polyethylene terephthalate (Polyethylene terephthalate, abbreviated as PET), polyethylene naphthalate (Polyethylene naphthalate two formic acid glycol ester, abbreviated as PBN), polycarbonate (abbreviated as PC), etc. For the flexible screen, the substrate 110 may be made of Polyimide (PI).

The OLED device layer 120 includes a plurality of pixels arranged in an array, and the pixels may include, for example, red pixels, green pixels, and blue pixels, and each adjacent group of the red pixels, the green pixels, and the blue pixels may form a pixel unit. By controlling the luminous fluxes of the pixels of different colors in each pixel unit, in other words, by adjusting the light emitting proportion of the pixels of different colors in each pixel unit, each pixel unit displays a color, and the colors displayed by all the pixel units together form an image displayed by the peep-proof display screen 100 a.

Note that in this and subsequent embodiments, a cross-sectional structure of a certain pixel (minimum unit) in the peep-proof display screen 100a is mainly shown.

Wherein the OLED device layer 120 includes a pixel defining layer 121 and a plurality of OLED devices 122. The pixel defining layer 121 is used to define the position, shape and size of the pixel, and the pixel defining layer 121 may be, for example, a mesh structure, and the pixel defining layer 121 encloses a plurality of pixel openings arranged in an array. Each OLED device 122 is disposed corresponding to each pixel opening surrounded by the pixel defining layer 121, the pixel defining layer 121 is disposed around the periphery of each OLED device 122, each OLED device 122 is, for example, arranged on the substrate 110 in an array, and each OLED device 122 emits light to form each pixel.

The pixel defining layer 121 should be capable of blocking light to prevent light leakage of pixels, cross color and short circuit between adjacent pixels on the basis of defining the positions, shapes and sizes of the pixels, and ensure the display effect of the privacy display 100 a. For example, the pixel defining layer 121 may be made of a light shielding material, for example, the pixel defining layer 121 may be made of a black acryl or polyimide material.

The OLED device 122 generally includes an anode layer 1221, a functional layer 1222, and a cathode layer 1223 sequentially stacked on the substrate 110, and the anode layer 1221, the functional layer 1222, and the cathode layer 1223 constitute a sandwich structure. The anode layer 1221 is typically a metal layer, and for example, a material constituting the anode layer 1221 may include simple substances or alloys of metal elements such as aluminum, magnesium, silver, chromium, gold, platinum, nickel, copper, tungsten, and the like. The cathode layer 1223 is typically made of a transparent material, so that the cathode layer 1223 can transmit light emitted from the functional layer 1222 to avoid loss of luminous flux, and the material constituting the cathode layer 1223 is, for example, indium Tin Oxide (ITO).

The functional layer 1222 includes a Hole Transport Layer (HTL), a light Emitting Layer (EL), and an Electron Transport Layer (ETL) (the hole transport layer, the light emitting layer, and the electron transport layer are all not shown in the drawing), and a voltage between the anode layer 1221 and the cathode layer 1223 acts on the functional layer 1222, and positive holes and cathode charges are combined in the light emitting layer to make the light emitting layer emit light, and different light emitting layers may generate three primary colors of red, green, and blue according to materials constituting the light emitting layer, so that the corresponding OLED device 122 forms red, green, and blue pixels, respectively.

For example, when forming the OLED device layer 120, the anode layer 1221 may be formed on the substrate 110, then, the pixel defining layer 121 may be formed on the substrate 110, each pixel opening surrounded by the pixel defining layer 121 is disposed corresponding to each anode layer 1221, and the opening area of the pixel opening may be smaller than the surface area of the anode layer 1221, and the pixel defining layer 121 covers the edge of the anode layer 1221. Then, in the pixel opening surrounded by the pixel defining layer 121, a functional layer 1222 and a cathode layer 1223 are sequentially formed, and the functional layer 1222 and the cathode layer 1223 are sequentially laminated on the anode layer 1221 to form the OLED device 122.

Also, the thickness of the pixel defining layer 121 may be greater than that of the OLED device 122, the functional layer 1222 is completely accommodated in the pixel opening surrounded by the pixel defining layer 121, and the top surface of the pixel defining layer 121 is higher than the top surface of the functional layer 1222 to ensure that adjacent pixels can be completely separated by the pixel defining layer 121 to avoid light crosstalk between the adjacent pixels.

With continued reference to fig. 4, a TFT (Thin Film Transistor ) driving layer 111 is further disposed on the substrate 110, and the TFT driving layer 111 includes a plurality of thin film transistors disposed on the substrate 110, and the thin film transistors may be connected to the OLED device 122 for driving the OLED device 122 to operate, in other words, the thin film transistors are used for turning on and off the pixels.

Taking the pixel structure shown in the figure as an example, the anode layer 1221 of each pixel is independently separated, which is equivalent to that each pixel is formed by an independent OLED device 122, where the driving mode of the pixel may be active driving (active driving), each pixel is configured with a thin film transistor, the thin film transistors are arranged in an array, and each pixel can emit light independently.

In other examples, the anode layer 1221 and the cathode layer 1223 of the OLED device 122 may be arranged in a longitudinal and transverse crossing manner, the functional layer 1222 is disposed corresponding to the crossing point of each anode layer 1221 and each cathode layer 1223, the thin film transistor is disposed at one end of the anode layer 1221 and the cathode layer 1223, each row (column) of the anode layer 1221 (or each column (row) of the cathode layer 1223) is controlled by the same thin film transistor, the OLED device 122 is scanned row by row and column by column in sequence, and each pixel emits light sequentially.

In addition, referring to fig. 4, in order to protect the OLED device 122, an encapsulation layer 130 is generally disposed on the OLED device layer 120, where the encapsulation layer 130 is used to isolate moisture and oxygen in the external environment, so as to prevent water/oxygen from penetrating into the OLED device 122 to affect the lifetime thereof. Wherein the encapsulation layer 130 may be implemented using an inorganic/organic multiple alternating thin film structure. The primary function of the inorganic layer is to block water and oxygen to prevent moisture or oxygen from entering the OLED device 122 and causing darkening of light emission. The thickness of the organic layer is typically large, helps planarize the surface of the substrate 110, and may encapsulate contaminant particles introduced during the film formation process. In addition, for flexible screens, the organic layer may also slow the stress of the adjacent inorganic layer when the privacy screen 100a is bent.

The encapsulation layer 130 may include a first inorganic layer 131, an organic layer 132, and a second inorganic layer 133, which are sequentially stacked, for example. The material used for the first inorganic layer 131 and the second inorganic layer 133 is, for example, one of SiNx, siOx, siON and Al2O3, and the material constituting the first inorganic layer 131 and the material constituting the second inorganic layer 133 may be the same or different. The first and second inorganic layers 131 and 133 may be formed by CVD (Chemical Vapor Deposition ), ALD (Atomic layer deposition, atomic layer deposition), PVD (Physical Vapor Deposition ), or the like. The material used for the organic layer 132 may be one of acrylate, hexamethyldisiloxane, polyacrylate, polycarbonate, and polystyrene, or may be other materials with similar properties, and the organic layer 132 may be formed by an Ink Jet Printing (IJP) or CVD process.

The OLED display module may further include a touch layer 140, where the touch layer 140 covers the encapsulation layer 130. The touch layer 140 is configured to implement a touch function of the electronic device 1, and when a user touches the peep-proof display screen 100a, a touch signal is generated, and after the touch signal is received by a controller in the electronic device 1, a touch position is detected, and according to the touch position input signal, a touch operation on the electronic device 1 is implemented.

With continued reference to fig. 4, in the peep-proof display screen 100a, a peep-proof layer 150 is further disposed on the OLED display module, in other words, the encapsulation layer 130 is further disposed on the peep-proof layer 150, which, in this embodiment, may cover the touch control layer 140. The peep-proof layer 150 is used for adjusting the light-emitting angle range of each pixel in the OLED display module, for example, the light-emitting angle range of each pixel is 0 ° -50 ° (the light-emitting angle completely perpendicular to the peep-proof display screen 100a is defined as 0 °) so that the content displayed on the peep-proof display screen 100a is visible only in a small viewing angle range (for example, 0 ° -50 °), and the content on the peep-proof display screen 100a cannot be observed from the side of the electronic device 1, so as to realize the peep-proof function of the peep-proof display screen 100 a.

The privacy layer 150 may include a base light absorbing layer 151 and a planar layer 152. The base light absorbing layer 151 is disposed on the encapsulation layer 130, and the base light absorbing layer 151 is provided with a plurality of first openings 1511, where the plurality of first openings 1511 are arranged in an array, and each first opening 1511 corresponds to a pixel opening of each pixel, in other words, the base light absorbing layer 151 exposes each pixel opening and surrounds the periphery of each pixel opening. The flat layer 152 covers the basic light absorption layer 151, and the flat layer 152 is used for flattening the peep-proof layer 150 to form a flat peep-proof layer 150, so that the setting of a film layer on the peep-proof layer 150 is facilitated, the overall flatness of the peep-proof display screen 100a is improved, and the structural strength and stability of the peep-proof display screen 100a are improved.

The basic light absorbing layer 151 may absorb light emitted by a corresponding pixel, in other words, for a certain pixel, the basic light absorbing layer 151 surrounding the periphery of the sub-pixel may absorb light emitted by the sub-pixel. Thus, light rays (shown by solid arrows in fig. 4) with small angles from the pixels, for example, light rays with angles in the range of 0 ° -50 ° can be emitted from the first opening 1511 of the base light absorbing layer 151, and a user with a small viewing angle (viewing angle approximately perpendicular to the privacy display 100 a) can receive light rays with small angles from the pixels, and a user with a small viewing angle can see what the privacy display 100a displays; while the light rays with a large angle (indicated by the dashed arrow in fig. 4), such as the light rays with an angle greater than 50 °, are transmitted to the basic light absorption layer 151, absorbed by the basic light absorption layer 151, and cannot be received by other people with a large viewing angle (such as the angle between the viewing angle and the vertical line of the peep-proof display screen 100a is greater than 50 °), and cannot be seen by other people with a large viewing angle.

Taking a red pixel as an example, the basic light absorbing layer 151 surrounding the periphery of the red pixel may absorb red light emitted by the red pixel, in other words, the basic light absorbing layer 151 surrounding the periphery of the red pixel cannot transmit the red light. The red light emitted by the red pixel with a small angle is emitted through the corresponding first opening 1511 of the basic light absorbing layer 151, and the user with a small viewing angle can receive the red light. The red light with a large angle emitted by the red pixel is emitted to the basic light absorption layer 151 surrounding the red pixel, and the red light with a large angle is absorbed by the basic light absorption layer 151, so that other people with a large viewing angle cannot receive the red light.

Therefore, by disposing the peep-proof layer 150 on the OLED display module, in other words, disposing the peep-proof layer 150 on the light-emitting side of the OLED display module, the light with a small angle emitted by the pixel can be emitted through the first opening 1511 formed in the base light-absorbing layer 151, and the light with a large angle emitted by the pixel is transmitted to the base light-absorbing layer 151 and absorbed by the base light-absorbing layer 151. Thus, the contents displayed on the peep-proof display screen 100a are visible to the user at a small viewing angle, but not visible to other people at a large viewing angle, so that the peep-proof function of the peep-proof display screen 100a is realized.

With continued reference to fig. 4, the peep-proof layer 150 may further include a first isolation layer 153 on the basis of the basic light absorption layer 151 and the flat layer 152, where the first isolation layer 153 is disposed on the encapsulation layer 130, and in this embodiment, the first isolation layer 153 may cover the touch layer 140, and the basic light absorption layer 151 is disposed on the first isolation layer 153.

By arranging the first isolation layer 153, the distance between the basic light absorption layer 151 and the OLED device 122 is increased, and in the thickness direction of the peep-proof display screen 100a, a sufficient distance is ensured between the basic light absorption layer 151 and the pixel definition layer 121 surrounding the periphery of the functional layer 1222, so that the basic light absorption layer 151 is ensured to be positioned on the light path of the large-angle light (for example, the light of more than 50 degrees) emitted by the pixel, and the situation that the basic light absorption layer 151 is too close to the OLED device 122, so that the light path of the large-angle light emitted by the pixel is avoided by the basic light absorption layer 151, and the basic light absorption layer 151 cannot effectively play a role is avoided.

The first isolation layer 153 may be transparent, and light emitted from the pixel may penetrate through the first isolation layer 153 and be emitted from the first opening 1511 formed in the base light absorbing layer 151, or transmitted to the base light absorbing layer 151 to be absorbed by the base light absorbing layer 151, so as to prevent the first isolation layer 153 from affecting the light emission of the pixel and avoid affecting the light transmittance of the peeping-preventing display screen 100 a. Illustratively, the first isolation layer 153 may be a transparent ink layer, and the first isolation layer 153 may be printed on the encapsulation layer 130 (e.g., on the surface of the encapsulation layer 130) by using an inkjet printing method.

The thickness of the first isolation layer 153 may be in the range of 8 μm to 20 μm, for example. In this way, the first isolation layer 153 can be ensured to have a sufficient thickness, so that the first isolation layer 153 can control the distance between the basic light absorbing layer 151 and the OLED device 122 within a proper range; the excessive thickness of the first isolation layer 153 is avoided, so that the first isolation layer 153 can be prevented from affecting the overall thickness of the peep-proof display screen 100a, and the peep-proof display screen 100a can be applied to the thin design of the electronic device 1.

For example, the thickness of the first isolation layer 153 may be 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, or the like.

Referring to fig. 4, in the present embodiment, the basic light absorbing layer 151 is directly formed on the first isolation layer 153, the flat layer 152 covers the basic light absorbing layer 151 and fills the first opening 1511 of the basic light absorbing layer 151, and a portion of the flat layer 152 located within the first opening 1511 may be formed on the first isolation layer 153. At this time, the base light absorbing layer 151 directly formed on the first separation layer 153 may have a certain thickness, and the thickness of the base light absorbing layer 151 may be in the range of 0.5 μm to 5 μm, for example, the thickness of the base light absorbing layer 151 may be 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, and the like. The thickness of the planarization layer 152 should be greater than the thickness of the base light absorbing layer 151 to ensure that the planarization layer 152 can completely cover the base light absorbing layer 151, and the thickness of the planarization layer 152 can be in the range of 2 μm-6 μm, for example, the thickness of the planarization layer 152 is 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, etc.

For example, an entire basic light absorbing layer 151 may be coated on the first isolation layer 153, and then a plurality of first openings 1511 arranged in an array may be etched on the basic light absorbing layer 151 by means of exposure and development. For the base light absorbing layer 151 having a certain thickness, the first opening 1511 formed may be generally in the shape of an inverted trapezoid, and the taper angle of the base light absorbing layer 151 at the bottom end of the first opening 1511 (the end near the first isolation layer 153) may be 30 ° -85 °. The planarization layer 152 may be formed of an optical resin material, and a resin layer may be coated on the base light absorbing layer 151 by spin coating, and the resin layer covers the base light absorbing layer 151 and fills the first openings 1511 to form the planarization layer 152.

In order to limit the light emitting angle of the privacy display 100a to a small angle range, the opening area of the first opening 1511 opened in the base light absorbing layer 151 cannot be excessively large, the first opening 1511 may be disposed to match according to the pixel opening, the shape of the first opening 1511 may be substantially consistent with the shape of the pixel opening, and the opening area of the first opening 1511 and the opening area of the pixel opening may be substantially consistent. For the basic light absorbing layer 151 disposed on the first isolation layer 153, since there is a sufficient space between the basic light absorbing layer 151 and the OLED device 122, the opening area of the first opening 1511 of the basic light absorbing layer 151 may be slightly larger than the opening area of the pixel opening, and may be designed according to the peep preventing angle (the angle range of the light rays required to be transmitted by the peep preventing layer 150) required by the peep preventing layer 150.

Illustratively, the difference between the center-to-edge distance of the first opening 1511 opened on the base light absorbing layer 151 and the center-to-edge distance of the pixel opening may be between-1 μm and 3 μm. That is, the opening area of the first opening 1511 may be slightly smaller than the opening area of the pixel opening, which allows a certain error in forming the basic light absorbing layer 151 and the pixel defining layer 121, which is also helpful for reducing the light emitting angle range of the peep-proof display 100a and enhancing the peep-proof effect of the peep-proof display 100 a.

For example, the difference in the center-to-edge distance of the first opening 1511 of the basic light absorbing layer 151 and the center-to-edge distance of the pixel opening may be-0.5 μm, 0 μm, 0.5 μm, 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, or the like.

As for the specific arrangement manner of the basic light absorbing layer 151, in some embodiments, the basic light absorbing layer 151 may include a light shielding layer 151a, where the light shielding layer 151a is opaque, that is, the light shielding layer 151a may absorb all the light beams of the colors, and the light shielding layer 151a may absorb the red light beams emitted by the red pixels, the green light beams emitted by the green pixels, and the blue light beams emitted by the blue pixels. At this time, the same light shielding layer 151a may be disposed for each pixel of different colors, and the light shielding layer 151a may be a mesh-shaped integrated structure for each pixel of the array arrangement.

As for the light shielding layer 151a as the base light absorbing layer 151, the light shielding layer 151a may be formed using a light shielding material, for example, the light shielding layer 151a may be a Black Matrix (BM) and the material for forming the black matrix may include a photosensitive resin, a pigment, a solvent, and the like.

In other embodiments, the basic light absorbing layer 151 may include a filter layer 151b, and the color of the filter layer 151b is different from that of the corresponding pixel. In this way, when the light rays with large angles emitted by the pixels are transmitted to the filter layer 151b, the filter layer 151b cannot transmit the light rays, but absorbs the light rays with large angles emitted by the pixels, so as to realize the peep-proof function of the peep-proof display screen 100 a.

For example, in the case of a red pixel, the filter layer 151b surrounding the red pixel may be provided as a filter layer 151b of a color other than red, for example, the filter layer 151b surrounding the red pixel may be a green filter layer or a blue filter layer. So configured, the basic light absorbing layer 151 often needs to be set to the filter layer 151b of different colors corresponding to the pixels of different colors, that is, the colors of the basic light absorbing layers 151 surrounding the peripheries of the pixels of different colors are different, and for the peep-proof display screen 100a including a plurality of pixels arranged in an array, the basic light absorbing layers 151 in the peep-proof display screen 100a may be formed by splicing a plurality of filter layers 151b of different colors arranged in an array.

With continued reference to fig. 4, in the peep-proof display screen 100a of the present embodiment, an optical adhesive layer 160, a circular polarizer 170 and a cover plate 180 are further disposed on the peep-proof layer 150, and the optical adhesive layer 160, the circular polarizer 170 and the cover plate 180 are sequentially stacked on the flat layer 152 of the peep-proof layer 150.

The optical adhesive layer 160 is used for adhering the circular polarizer 170 and the cover plate 180 to the peep-proof layer 150, so that the connection strength of the circular polarizer 170 and the cover plate 180 can be ensured, and the light transmittance of the optical adhesive layer 160 is high, so that the light transmittance of the peep-proof display screen 100a cannot be affected. The circular polarizer 170 is used for solving the problem of reflection of the peep-proof display screen 100a to external environment light, and improving the contrast of the peep-proof display screen 100a in a bright environment. The cover plate 180 is located on the outer surface of the whole peep-proof display screen 100a, and is used for protecting the peep-proof layer 150 and the OLED display module below, preventing impurities such as water vapor and dust in the external environment from entering the peep-proof display screen 100a, so as to avoid affecting the OLED device 122, and the cover plate 180 can improve the overall structural strength of the peep-proof display screen 100a and ensure the reliability of the peep-proof display screen 100 a.

Example two

Fig. 5 is a schematic structural diagram of a peep-proof display screen according to a second embodiment of the present application. Referring to fig. 5, similar to the embodiment, the peep-proof display screen 100a provided in the second embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is the same as that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the second embodiment also includes a base light absorption layer 151 and a flat layer 152, where the base light absorption layer 151 is disposed on the encapsulation layer 130 of the OLED display module, and when the OLED display module has the touch layer 140, the base light absorption layer 151 may be disposed on the touch layer 140, and the flat layer 152 covers the base light absorption layer 151, which is not repeated herein.

In addition, similar to the embodiment, the peep-proof layer 150 of the present embodiment also includes a first isolation layer 153, the first isolation layer 153 is disposed on the OLED display module, and the basic light absorbing layer 151 is disposed on the first isolation layer 153. Specifically, in this embodiment, the first isolation layer 153 may cover the touch layer 140 of the OLED display module, the basic light absorbing layer 151 is directly formed on the first isolation layer 153, the flat layer 152 covers the basic light absorbing layer 151 and fills the first opening 1511 of the basic light absorbing layer 151, and the portion of the flat layer 152 located in the first opening 1511 is formed on the first isolation layer 153.

Referring to fig. 5, in this embodiment, the peep-proof layer 150 further includes a high-refraction layer 154, where the high-refraction layer 154 is located above the encapsulation layer 130 of the OLED display module, for example, the high-refraction layer 154 is formed on the touch layer 140 of the OLED display module, on the basis that the peep-proof layer 150 is provided with the first isolation layer 153, the basic light absorption layer 151 and the flat layer 152. The first isolation layer 153 covers the high-refraction layer 154, the high-refraction layer 154 includes a plurality of high-refraction portions 154a arranged in an array, each high-refraction portion 154a is arranged opposite to each pixel opening, and the first isolation layer 153 covers each high-refraction portion 154a.

Taking the thickness of the first separator 153 as an example of 8 μm to 20 μm, in order for the first separator 153 to completely cover each of the high-folded portions 154a, the thickness of each of the high-folded portions 154a may be set between 2 μm and 8 μm, for example, the thickness of the high-folded portion 154a may be 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, or the like. The high-refraction layer 154 may be formed by using an optical resin material, and when the high-refraction layer 154 is formed on the touch layer 140, the high-refraction layer 154 may be coated to form a whole layer, and then the high-refraction layer 154 is patterned into a plurality of high-refraction portions 154a arranged in an array through exposure and development processes.

Wherein the refractive index of the high refractive layer 154 is higher than that of the first isolation layer 153. Illustratively, the refractive index of high refractive layer 154 may be in the range of 1.56-1.80, e.g., the refractive index of high refractive layer 154 is 1.58, 1.60, 1.62, 1.64, 1.66, 1.68, 1.70, 1.72, 1.74, 1.76, 1.78, etc. The refractive index of the first isolation layer 153 may be in the range of 1.4 to 1.55, for example, the refractive index of the first isolation layer 153 may be 1.42, 1.44, 1.46, 1.48, 1.50, 1.52, 1.54, etc.

Also, referring to fig. 5, the top surface (side surface facing away from the first isolation layer 153) edge of the high-refractive portion 154a has a light-condensing region 1541, at least a partial region of the light-condensing region 1541 is exposed in the first opening 1511 of the base light-absorbing layer 151, and the light-condensing region 1541 is a curved surface protruding toward the outer periphery of the high-refractive portion 154 a. Thus, similar to the embodiment, light rays (shown by solid small arrows) emitted from the pixels can sequentially pass through the high refractive layer 154 and the first isolation layer 153 and be irradiated outwards through the first opening 1511 of the basic light absorbing layer 151; the high angle light rays (indicated by the dashed arrows) emitted from the pixels are transmitted to the base light absorbing layer 151 and absorbed by the base light absorbing layer 151. On this basis, part of the light rays with a larger angle (shown by the solid large arrow) emitted by the pixels are transmitted to the light-gathering region 1541 of the high-refraction portion 154a, and are refracted at the interface between the high-refraction portion 154a and the first isolation layer 153, and become light rays with a smaller angle after refraction, and the light rays with a smaller angle can be irradiated outwards through the first opening 1511 of the basic light-absorbing layer 151.

So configured, for a portion of the high-angle light transmitted to the light-condensing region 1541 of the high-refraction layer 154, the high-refraction layer 154 and the first isolation layer 153 may be refracted to form a low-angle light, and the low-angle light is emitted from the first opening 1511 of the basic light-absorbing layer 151. In this way, the light-emitting loss of the pixel is reduced, the light-emitting efficiency of the pixel is improved, and the front brightness of the peep-proof display screen 100a can be improved and the display effect of the peep-proof display screen 100a can be improved due to the increased proportion of light emitted from the pixel at a small angle.

The surface area of the high refraction portion 154a may be substantially identical to the opening area of the first opening 1511 of the basic light absorbing layer 151, or the surface area of the high refraction portion 154a may be slightly larger than the opening area of the first opening 1511, so that the high refraction portion 154a may substantially cover the first opening 1511, the light-gathering region 1541 at the edge of the high refraction portion 154a substantially corresponds to the edge of the first opening 1511, so as to increase the light-emitting area of the light with a small angle after being refracted by the light-gathering region 1541 of the high refraction portion 154a, and make the light refracted by the light-gathering region 1541 cover the edge of the first opening 1511 of the basic light absorbing layer 151 as much as possible, so as to ensure that the high refraction portion 154a performs an effective function.

For example, each of the high-refraction portions 154a may be provided as a light filtering portion, and the color of each light filtering portion may be the same as the color of the corresponding pixel, for example, the high-refraction portion 154a provided above the red pixel may be a red light filtering portion. In this way, the high-refraction portion 154a can absorb (filter) the large-angle light beam of the other color pixel, for example, the large-angle light beam emitted from the green pixel adjacent to the red pixel, and enter the high-refraction portion 154a (red filter) above the red pixel, and the high-refraction portion 154a can absorb the green light beam emitted from the green pixel, thereby playing a role of preventing crosstalk and light leakage. In addition, when the light of the external environment is incident into the peep-proof display screen 100a, the high-refraction portion 154a of the corresponding color disposed above the pixel may absorb the light of other external colors, for example, the high-refraction portion 154a (red filter portion) disposed above the red pixel may absorb the green light, the blue light, and so on of the external environment, so as to reduce the reflectivity of the peep-proof display screen 100 a.

With continued reference to fig. 5, similar to the embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160, a circular polarizer 170 and a cover plate 180 above the peep-proof layer 150, where the optical adhesive layer 160, the circular polarizer 170 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150, and will not be repeated here.

Example III

Fig. 6 is a schematic structural diagram of a peep-proof display screen according to a third embodiment of the present application. Referring to fig. 6, the peep-proof display screen 100a provided in the third embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the third embodiment also includes a basic light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

In the embodiment, the touch layer 140 is a patterned touch layer 140, the touch layer 140 is provided with a plurality of second openings 141 arranged in an array, each second opening 141 faces each pixel opening, the first isolation layer 153 covers the touch layer 140 and fills each second opening 141, and a portion of the first isolation layer 153 located in the second opening 141 is formed on the encapsulation layer 130.

It should be noted that the substrate material of the touch layer 140 may be an optical resin material, and a circuit is disposed in the substrate material to implement the touch function of the touch layer 140. When forming the touch layer 140, the touch layer 140 may be coated to form an integral touch layer 140, and then the touch layer 140 is patterned through exposure and development processes to form a plurality of second openings 141 arranged in an array in the touch layer 140. For example, the thickness of the touch layer 140 may be set between 3 μm and 5 μm, for example, the thickness of the touch layer 140 may be 3.5 μm, 4 μm, 4.5 μm, etc.

The touch layer 140 may be made of a material with a low refractive index, and the first isolation layer 153 may be made of a material with a high refractive index, and the refractive index of the touch layer 140 is smaller than that of the first isolation layer 153. For example, the refractive index of the touch layer 140 may be 1.4-1.55, for example, the refractive index of the touch layer 140 is 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, etc. The refractive index of the first isolation layer 153 may be 1.6 to 1.8, for example, the refractive index of the first isolation layer 153 is 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78, etc.

Referring to fig. 6, similar to the embodiment, light rays (shown by solid small arrows) emitted from the pixels can pass through the first isolation layer 153 and radiate outwards through the first opening 1511 of the basic light absorbing layer 151; the high-angle light rays (indicated by the dashed arrows) emitted from the pixels can be transmitted to the basic light absorbing layer 151 through the touch layer 140 and absorbed by the basic light absorbing layer 151. On this basis, part of the light rays (shown by the solid large arrow) with a larger angle, which are emitted by the pixels, are transmitted to the side wall of the second opening 141 of the touch layer 140, and are totally reflected at the interface between the first isolation layer 153 and the touch layer 140, and become light rays with a small angle after being reflected, and the light rays with a small angle can be irradiated outwards through the first opening 1511 of the basic light absorbing layer 151.

So configured, for the part of the large-angle light transmitted to the sidewall of the second opening 141 of the touch layer 140, the light can be totally reflected by the interface between the first isolation layer 153 and the touch layer 140, and the light forms a small-angle light after being totally reflected and is emitted from the first opening 1511 of the basic light absorbing layer 151. In this way, the light-emitting loss of the pixel is reduced, the light-emitting efficiency of the pixel is improved, and the front brightness of the peep-proof display screen 100a can be improved and the display effect of the peep-proof display screen 100a can be improved due to the increased proportion of light emitted from the pixel at a small angle.

The second opening 141 of the touch layer 140 may be disposed in a matching manner according to the pixel opening, the shape of the second opening 141 may be substantially consistent with the shape of the pixel opening, and the opening area of the second opening 141 may be substantially consistent with the opening area of the pixel opening, or the opening area of the second opening 141 may be slightly larger than the opening area of the pixel opening. For example, the difference between the center-to-edge distance of the second opening 141 opened on the touch layer 140 and the center-to-edge distance of the pixel opening may be between-1 μm and-4 μm.

With continued reference to fig. 6, similar to the embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160, a circular polarizer 170 and a cover plate 180 above the peep-proof layer 150, where the optical adhesive layer 160, the circular polarizer 170 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150, and will not be repeated here.

Example IV

Fig. 7 is a schematic structural diagram of a peep-proof display screen according to a fourth embodiment of the present application. Referring to fig. 7, the peep-proof display screen 100a provided in the fourth embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the fourth embodiment also includes a basic light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

Similar to the third embodiment, in this embodiment, the touch layer 140 is also a patterned touch layer 140, and the touch layer 140 is provided with a plurality of second openings 141 arranged in an array, and each second opening 141 faces each pixel opening. On this basis, referring to fig. 7, in this embodiment, the peep-proof layer 150 further includes a second isolation layer 155 and a first low-refraction layer 156, the second isolation layer 155 is covered on the touch layer 140 and fills each second opening 141 of the touch layer 140, the first low-refraction layer 156 is covered on the second isolation layer 155, the first low-refraction layer 156 is provided with a plurality of third openings 1561 arranged in an array, each third opening 1561 faces each pixel opening, and the first isolation layer 153 is covered on the first low-refraction layer 156 and fills each third opening 1561 of the first low-refraction layer 156.

Taking the thickness of the touch layer 140 as an example, the thickness of the second isolation layer 155 may be slightly greater than the thickness of the touch layer 140 in order for the second isolation layer 155 to completely cover the touch layer 140, the thickness of the second isolation layer 155 may be between 4 μm and 7 μm, for example, the thickness of the second isolation layer 155 may be 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, etc.

The second isolation layer 155 and the first low-refraction layer 156 may be made of an optical resin material, after the patterned touch layer 140 is formed by coating, exposing and developing on the encapsulation layer 130, the second isolation layer 155 is coated on the touch layer 140, after that, the first low-refraction layer 156 is formed by coating, exposing and developing on the second isolation layer 155, and then the first isolation layer 153 is formed by inkjet printing on the first low-refraction layer 156.

The touch layer 140 and the first low refractive layer 156 may be made of a material with a low refractive index, and the first isolation layer 153 and the second isolation layer 155 may be made of a material with a high refractive index, so that the refractive index of the touch layer 140 is lower than that of the second isolation layer 155, and the refractive index of the first low refractive layer 156 is lower than that of the first isolation layer 153. Illustratively, the refractive index of the touch layer 140 and the first low refractive layer 156 may be 1.4-1.55, e.g., the refractive index of the touch layer 140 and the first low refractive layer 156 is 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, etc. The refractive index of the first and second isolation layers 153 and 155 may be 1.6 to 1.8, for example, the refractive index of the first and second isolation layers 153 and 155 is 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78, etc.

Referring to fig. 7, similar to the embodiment, light rays (indicated by dotted small arrows) emitted from the pixels can sequentially pass through the second isolation layer 155 and the first isolation layer 153, and be irradiated outwards through the first opening 1511 of the basic light absorbing layer 151; the light rays (indicated by the dashed large arrows) emitted from the pixels can be transmitted to the basic light absorption layer 151 and absorbed by the basic light absorption layer 151 through the touch control layer 140, the second isolation layer 155, the first low-refraction layer 156 and the first isolation layer 153 in sequence. On this basis, part of the light rays (shown by the solid small arrow in the figure) with larger angles, which are emitted by the pixels, are transmitted to the side wall of the second opening 141 of the touch layer 140, and are totally reflected at the interface between the second isolation layer 155 and the touch layer 140, and become light rays with smaller angles after reflection, and the light rays with smaller angles can irradiate outwards through the first opening 1511 of the basic light absorbing layer 151; similarly, a portion of the light rays with a larger angle (shown by the large arrow in the figure) emitted from the pixel are transmitted to the sidewall of the third opening 1561 of the first low refractive layer 156, and are totally reflected at the interface between the first isolation layer 153 and the first low refractive layer 156, and become light rays with a smaller angle after being reflected, and the light rays with a smaller angle can be irradiated outwards through the first opening 1511 of the basic light absorbing layer 151.

So arranged, the interface between the second isolation layer 155 and the touch control layer 140 can totally reflect part of the large-angle light rays emitted by the pixels, the interface between the first isolation layer 153 and the first low refraction layer 156 can also totally reflect part of the large-angle light rays emitted by the pixels, and the two layers of high-low refraction interfaces totally reflect the large-angle light rays to form small-angle light rays, so that the luminous loss of the pixels can be further reduced, the luminous efficiency of the pixels is improved, the proportion of the small-angle light rays emitted by the pixels is further increased, the front brightness of the peep-proof display screen 100a is further improved, and the display effect of the peep-proof display screen 100a is improved.

The third opening 1561 of the first low-folded layer 156 may be disposed in a matching manner according to the pixel opening, similar to the second opening 141 of the touch layer 140, the shape of the third opening 1561 of the first low-folded layer 156 may be substantially consistent with the shape of the pixel opening, and the opening area of the third opening 1561 may be substantially consistent with the opening area of the pixel opening, or the opening area of the third opening 1561 may be slightly larger than the opening area of the pixel opening. Illustratively, the difference between the center-to-edge distance of the third opening 1561 formed in the first lower layer 156 and the center-to-edge distance of the pixel opening may be between-1 μm and-4 μm.

With continued reference to fig. 7, similar to the embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160, a circular polarizer 170 and a cover plate 180 above the peep-proof layer 150, where the optical adhesive layer 160, the circular polarizer 170 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150, and will not be repeated here.

Example five

Fig. 8 is a schematic structural diagram of a peep-proof display screen according to a fifth embodiment of the present application. Referring to fig. 8, the peep-proof display screen 100a provided in the fifth embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the fifth embodiment also includes a base light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

Referring to fig. 8, the peep-proof layer 150 of the present embodiment may further include a color photoresist layer 157 on the basis of the basic light absorption layer 151, wherein the color photoresist layer 157 may be formed on the first isolation layer 153, and the flat layer 152 covers the color photoresist layer 157. The color photoresist layer 157 includes a plurality of photoresist portions 157a arranged in an array, and each of the photoresist portions 157a is disposed corresponding to each of the first openings 1511 of the basic light absorbing layer 151, corresponding to each of the photoresist portions 157a being disposed corresponding to each of the pixel openings.

In order to enable the planarization layer 152 to completely cover the color photoresist layer 157, the thickness of the color photoresist layer 157 should be smaller than the thickness of the planarization layer 152. Taking the thickness of the planarization layer 152 as 2 μm-6 μm as an example, the thickness of the color photoresist layer 157 (the photoresist portion 157 a) may be 2 μm-5 μm, for example, the thickness of the color photoresist layer 157 is 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, etc.

Specifically, in the present embodiment, the basic light absorbing layer 151 directly covers the first isolation layer 153, and each of the photoresist portions 157a of the photoresist layer 157 fills each of the first openings 1511 of the basic light absorbing layer 151. After the patterned basic light absorption layer 151 is coated, exposed and developed, the entire color photoresist layer 157 is coated on the basic light absorption layer 151, and then the color photoresist layer 157 is patterned by exposure and development to form the photoresist portions 157a filled in the first openings 1511.

Since the base light absorbing layer 151 may absorb light emitted from the corresponding pixel, each of the photoresist portions 157a may be filled only in each of the first openings 1511, or the photoresist portions 157a may extend to cover the top surface of the base light absorbing layer 151 on the basis that each of the photoresist portions 157a is filled in the first openings 1511, and the photoresist portions 157a may not affect the light absorbing (or light shielding) effect of the base light absorbing layer 151.

The color of each photoresist portion 157a is the same as the color of the corresponding pixel, and, for example, the photoresist portion 157a disposed above the red pixel may be red, in other words, the photoresist portion 157a disposed above the red pixel may be a red photoresist portion. When the light from the external environment is incident into the peep-proof display screen 100a, the light-resistant portion 157a above the pixel can absorb the light from other external colors, and the light absorption effect of the basic light absorption layer 151 surrounding the light-resistant portion can reduce the reflectivity of the peep-proof display screen 100a and improve the contrast of the peep-proof display screen 100 a. When the light with a large angle emitted from the surrounding pixels with other colors is transmitted to the photoresist portion 157a above the pixels, the photoresist portion 157a can absorb the light with a large angle, and thus the effects of preventing crosstalk and light leakage are achieved.

With continued reference to fig. 8, similar to the embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160 and a cover plate 180 above the peep-proof layer 150, and the optical adhesive layer 160 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150. Since the color photoresist layer 157 is added on the first isolation layer 153 in this embodiment, the color photoresist layer 157 can reduce the reflectivity of the peep-proof display 100a and improve the contrast of the peep-proof display 100a, so that the circular polarizer 170 is not required to be disposed under the cover plate 180.

It should be noted that fig. 8 shows a manner in which the touch layer 140 is provided with a plurality of second openings 141 arranged in an array, that is, the present embodiment is based on the third embodiment, and the color photoresist layer 157 is further added to the first isolation layer 153. It is to be understood that the manner of adding the color photoresist layer 157 in this embodiment and the following embodiments may be an improvement based on the first embodiment, the second embodiment or the fourth embodiment, and will not be described again.

Example six

Fig. 9 is a schematic structural diagram of a peep-proof display screen according to a sixth embodiment of the present application. Referring to fig. 9, the peep-proof display screen 100a provided in the sixth embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the sixth embodiment also includes a base light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

Similar to the fifth embodiment, the peep-proof layer 150 of the present embodiment also includes a color photoresist layer 157, the color photoresist layer 157 is formed on the first isolation layer 153, and each of the first openings 1511 of the basic light absorbing layer 151 is filled with each of the photoresist portions 157a of the color photoresist layer 157. On the basis of the fifth embodiment, the peep-proof layer 150 of the present embodiment further includes a second low-refraction layer 158, wherein the second low-refraction layer 158 is formed on the basic light-absorbing layer 151, in other words, the second low-refraction layer 158 covers the basic light-absorbing layer 151 and the sidewalls of each first opening 1511, the second low-refraction layer 158 is provided with a plurality of fourth openings 1581, each fourth opening 1581 is located in each first opening 1511, and each photoresist 157a is filled in each fourth opening 1581.

The thickness of the second low-folded layer 158 may be smaller, and the thickness of the second low-folded layer 158 may be between 0.5 μm and 2 μm, for example, the thickness of the second low-folded layer 158 is 0.8 μm, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, etc. The second low-refraction layer 158 may be made of an optical resin material, after the patterned basic light-absorbing layer 151 is formed, a whole layer of the second low-refraction layer 158 may be coated on the basic light-absorbing layer 151, then the second low-refraction layer 158 is exposed and developed, a plurality of fourth openings 1581 arranged in an array and located in the first openings 1511 of the basic light-absorbing layer 151 are formed on the second low-refraction layer 158, and then the color photoresist layer 157 is formed on the second low-refraction layer 158.

The second low refractive layer 158 may be made of a low refractive material, and the color photoresist layer 157 may be made of a high refractive material, and the refractive index of the second low refractive layer 158 is lower than that of the color photoresist layer 157. Illustratively, the refractive index of the second low refractive layer 158 may be 1.4-1.55, e.g., the refractive index of the second low refractive layer 158 is 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, etc. The refractive index of the color photoresist layer 157 may be 1.58-1.8, for example, the refractive index of the color photoresist layer 157 is 1.60, 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78, etc.

Referring to fig. 9, a portion of the large-angle light (shown by solid arrows) emitted from the pixel sequentially passes through the first isolation layer 153 and the color photoresist layer 157, is transmitted to the sidewall of the fourth opening 1581 of the second low-refractive layer 158, and is refracted or totally reflected at the interface between the color photoresist layer 157 and the second low-refractive layer 158 to form a small-angle light, and the small-angle light is emitted outwards through the color photoresist layer 157. In this way, the light emission loss of the pixel can be reduced, the light emission efficiency of the pixel can be improved, the light emitting proportion of the pixel at a small angle can be increased, and the front view brightness of the peep-proof display screen 100a can be improved. In addition, the range of the light emergent angle of the peep-proof display screen 100a is reduced, and the peep-proof effect of the peep-proof display screen 100a is improved.

With continued reference to fig. 8, similar to the fifth embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160 and a cover plate 180 above the peep-proof layer 150, where the optical adhesive layer 160 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150, and will not be described herein.

Example seven

Fig. 10 is a schematic structural diagram of a peep-proof display screen according to a seventh embodiment of the present application; fig. 11 is a schematic structural diagram of another peep-proof display screen according to the seventh embodiment of the present application. Referring to fig. 10 or 11, the peep-proof display screen 100a provided in the seventh embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the seventh embodiment also includes a base light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

Similar to the fifth embodiment, the peep-proof layer 150 of the present embodiment also includes a color photoresist layer 157, and the color photoresist layer 157 is formed on the first isolation layer 153. Referring to fig. 10 or 11, unlike the fifth embodiment, the peep-proof layer 150 further includes a third lower layer 159, the third lower layer 159 may be directly formed on the first isolation layer 153, and the basic light absorbing layer 151 is formed on the third lower layer 159. The third low-refraction layer 159 is provided with a plurality of fifth openings 1591, each fifth opening 1591 is disposed opposite to a pixel opening of each pixel, each photoresist portion 157a of the color photoresist layer 157 is filled in each fifth opening 1591, each first opening 1511 of the basic light-absorbing layer 151 located above the third low-refraction layer 159 corresponds to each fifth opening 1591 of the third low-refraction layer 159, the photoresist portion 157a located in the fifth opening 1591 is exposed outside the basic light-absorbing layer 151, and the flat layer 152 covers the basic light-absorbing layer 151 and the color photoresist layer 157.

Illustratively, the shape of the fifth opening 1591 on the third lower layer 159 may match the shape of the pixel opening, and the opening area of the fifth opening 1591 may be greater than or equal to the opening area of the pixel opening.

Since the third low-folded layer 159 is formed on the first separation layer 153, the thickness of the third low-folded layer 159 may be greater, and the thickness of the third low-folded layer 159 may be between 0.5 μm and 3 μm, for example, the thickness of the third low-folded layer 159 may be 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, or the like. And the base light absorbing layer 151 is formed on the third lower layer 159, the thickness of the base light absorbing layer 151 may be small, and the thickness of the base light absorbing layer 151 may be between 0.5 μm and 1 μm, for example, the thickness of the base light absorbing layer 151 may be 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, etc.

The third low-refractive layer 159 may be formed of an optical resin material, and the entire third low-refractive layer 159 may be coated on the first isolation layer 153, and then the third low-refractive layer 159 may be exposed and developed, and a plurality of fifth openings 1591 arranged in an array and corresponding to the respective pixel openings may be formed on the third low-refractive layer 159. Wherein, the fifth opening 1591 of the third low refractive layer 159 may have an inverted trapezoid shape, and the bottom end of the third low refractive layer 159 may have a taper angle of 30 ° -85 °. Then, a color photoresist layer 157 is formed by coating, exposing and developing on the third lower layer 159, so that each of the photoresist portions 157a of the color photoresist layer 157 is filled in each of the fifth openings 1591 of the third lower layer 159, and then, a basic light absorption layer 151 is formed by coating, exposing and developing on the third lower layer 159.

For example, the photoresist portion 157a of the color photoresist layer 157 may be filled only in the fifth opening 1591 of the third low refractive layer 159. Alternatively, the photoresist portion 157a may extend beyond the fifth opening 1591 and cover the top surface of the third low refractive layer 159, and at this time, the basic light absorbing layer 151 may cover the color photoresist layer 157 (the photoresist portion 157 a). The photoresist portion 157a extending to cover the top surface of the third low refractive layer 159 and the basic light absorbing layer 151 covering the color photoresist layer 157 are described below, and will not be described again.

The third low refractive layer 159 may be made of a low refractive material, and the color photoresist layer 157 may be made of a high refractive material, and the refractive index of the third low refractive layer 159 is lower than that of the color photoresist layer 157. Illustratively, the refractive index of the third low refractive layer 159 may be 1.4-1.55, for example, the refractive index of the third low refractive layer 159 is 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, etc. The refractive index of the color photoresist layer 157 may be 1.58-1.8, for example, the refractive index of the first color photoresist layer 157 is 1.60, 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78, etc.

Referring to fig. 10 or 11, a portion of the high-angle light (indicated by solid arrows) emitted from the pixel sequentially passes through the first isolation layer 153 and the color photoresist layer 157, is transmitted to the sidewall of the fifth opening 1591 of the third low-refractive layer 159, and is refracted or totally reflected at the interface between the color photoresist layer 157 and the third low-refractive layer 159, so as to form a low-angle light, and the low-angle light is emitted outwards through the color photoresist layer 157. In this way, the light emission loss of the pixel can be reduced, the light emission efficiency of the pixel can be improved, the light emitting proportion of the pixel at a small angle can be increased, and the front view brightness of the peep-proof display screen 100a can be improved. In addition, the range of the light emergent angle of the peep-proof display screen 100a is reduced, and the peep-proof effect of the peep-proof display screen 100a is improved.

As for the base light absorbing layer 151 formed on the third lower layer 159, the base light absorbing layer 151 may be a light shielding layer 151a, and the base light absorbing layer 151 may absorb light of all colors, similar to the base light absorbing layer 151 in the first embodiment; alternatively, the basic light absorbing layer 151 may be a filter layer 151b, and the color of the basic light absorbing layer 151 is different from that of the corresponding pixel, and the basic light absorbing layer 151 may absorb the light with a large angle emitted by the corresponding pixel, which is not described herein.

Taking the basic light absorbing layer 151 as the filter layer 151b of another color as an example, referring to fig. 10, the basic light absorbing layer 151 may include only one filter layer 151b, and the embodiment defines the single filter layer 151b as the first filter layer 1512, where the color of the first filter layer 1512 is different from the color of the corresponding pixel. Taking a red pixel as an example, the first filter layer 1512 provided over the red pixel as the basic light absorbing layer 151 may be a green filter layer or a blue filter layer.

When the first filter layer 1512 covers the color photoresist layer 157, the color of the first filter layer 1512 is different from that of the color photoresist layer 157, so that the first filter layer 1512 can absorb the light emitted by the corresponding pixel, and the color photoresist layer 157 can absorb the light with a large angle emitted by the surrounding pixels with different colors. Therefore, by superimposing the first filter layer 1512 on the color resist layer 157, the effects of preventing crosstalk and light leakage can be achieved, and the display effect of the peep-proof display 100a can be improved.

Referring to fig. 11, the basic light absorbing layer 151 may include two filter layers 151b stacked in order, in other words, a second filter layer 1513 is further provided on the first filter layer 1512, the color of the first filter layer 1512 and the color of the second filter layer 1513 are different from the color of the corresponding pixel, and the color of the first filter layer 1512 and the color of the second filter layer 1513 are different. Continuing with the example of a red pixel, in the basic light absorbing layer 151 disposed above the red pixel, one of the first filter layer 1512 and the second filter layer 1513 may be a green filter layer, and the other may be a blue filter layer.

When the first filter layer 1512 and the second filter layer 1513 are sequentially stacked on the color photoresist layer 157, the colors of the color photoresist layer 157, the first filter layer 1512 and the second filter layer 1513 are different, for example, the colors of the color photoresist layer 157, the first filter layer 1512 and the second filter layer 1513 are red, green and blue respectively, and the three colors form three primary colors, so that light emitted by pixels of all colors can be absorbed, better effects of preventing light from being transmitted and light leakage can be achieved, and the display effect of the peeping-proof display screen 100a is further improved.

With continued reference to fig. 10 or 11, similar to the fifth embodiment, the peep-proof display screen 100a in this embodiment is further provided with an optical adhesive layer 160 and a cover plate 180 above the peep-proof layer 150, where the optical adhesive layer 160 and the cover plate 180 are sequentially laminated on the flat layer 152 of the peep-proof layer 150, and will not be described herein.

Example eight

Fig. 12 is a schematic structural diagram of a peep-proof display screen according to an eighth embodiment of the present application. Referring to fig. 12, a structure of two adjacent pixels, which may be different in color, for example, red and green pixels, respectively, is shown.

The peep-proof display screen 100a provided in this embodiment also includes an OLED display module and a peep-proof layer 150 stacked on the OLED display module. The structure of the OLED display module is similar to that of the OLED display module in the first embodiment, and the peep-proof layer 150 in the fourth embodiment also includes a basic light absorption layer 151, a flat layer 152 and a first isolation layer 153, which are not described herein again.

Referring to fig. 12, unlike the embodiment, the peep-proof display screen 100a of the present embodiment further includes an additional light-absorbing layer 190, the additional light-absorbing layer 190 is disposed on the light-emitting side of the pixel, and the additional light-absorbing layer 190 is disposed on the side of the base light-absorbing layer 151 facing the substrate 110. That is, the additional light absorbing layer 190 is located between the OLED device 122 and the base light absorbing layer 151 in the thickness direction of the privacy display 100 a. The additional light absorbing layer 190 is provided with a plurality of sixth openings 191 arranged in an array, and each sixth opening 191 corresponds to each pixel opening.

The additional light-absorbing layer 190 is mainly used to improve the crosstalk phenomenon of the high-angle light between the pixels, and for this purpose, the additional light-absorbing layer 190 may be located on the light path of the high-angle light that may be crosstalk to the pixel by the adjacent pixel, for example, the additional light-absorbing layer 190 is located on the light path of the light that may pass through the first opening 1511 of the basic light-absorbing layer 151 of the pixel in the high-angle light emitted by the adjacent pixel. Thus, the additional light absorbing layer 190 can absorb the light of the adjacent pixels with a large angle, which can prevent crosstalk and light leakage.

In order to ensure that the additional light absorbing layer 190 can prevent the crosstalk phenomenon between adjacent pixels, a certain interval may be provided between the additional light absorbing layer 190 and the base light absorbing layer 151 in the thickness direction of the privacy display 100a, so as to ensure that the additional light absorbing layer 190 can block the light path of the light rays of the adjacent pixels (which can cross-talk to the pixels) with a large angle. For example, the additional light absorbing layer 190 may be disposed within the encapsulation layer 130 (e.g., the organic layer 132) of the OLED display module, or the additional light absorbing layer 190 may be disposed over the encapsulation layer 130, e.g., the additional light absorbing layer 190 is disposed on the touch layer 140, and the first isolation layer 153 covers the additional light absorbing layer 190 (as shown in fig. 12).

Taking the example that the first separation layer 153 covers the additional light absorbing layer 190, in order for the first separation layer 153 to completely cover the additional light absorbing layer 190, the thickness of the additional light absorbing layer 190 should be smaller than that of the first separation layer 153. Illustratively, the thickness of the additional light absorbing layer 190 may be substantially consistent with the thickness of the base light absorbing layer 151, and the thickness of the additional light absorbing layer 190 may be between 0.5 μm and 5 μm, e.g., the thickness of the additional light absorbing layer 190 may be 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, etc.

Referring to fig. 12, for a pixel, light rays (shown by a solid large arrow) with a small angle emitted by the pixel can pass through the first isolation layer 153 and radiate outwards through the first opening 1511 of the basic light absorbing layer 151; the large-angle light rays (shown by the small arrows in the figure) emitted from the pixels are transmitted to the base light absorbing layer 151 and absorbed by the base light absorbing layer 151; the extra-large angle light emitted from the pixel and which is cross-linked to the adjacent pixel (shown by the solid line arrow + the broken line arrow extending in sequence) is transmitted to the additional light absorbing layer 190 and absorbed by the additional light absorbing layer 190.

As for the specific arrangement of the additional light absorbing layer 190, the additional light absorbing layer 190 may be a light shielding layer, and the additional light absorbing layer 190 may absorb light of all colors, similar to the base light absorbing layer 151. It should be noted that, because the extra-large angle light emitted by the pixel and which may cross-talk to the adjacent pixel may pass through the additional light absorbing layer 190 disposed above the pixel, and may also pass through the additional light absorbing layer 190 disposed above the adjacent pixel, and the colors of the adjacent pixels are generally different, the additional light absorbing layer 190 may be configured as a light shielding layer capable of absorbing light of all colors for convenience of arrangement.

In addition, for the additional light absorbing layer 190 that blocks the crosstalk of the light rays with a large angle between the pixels, the opening area of the sixth opening 191 of the additional light absorbing layer 190 may be slightly larger than the opening area of the first opening 1511 of the base light absorbing layer 151, that is, the orthographic projection of the sixth opening 191 of the additional light absorbing layer 190 on the flat layer 152 may completely cover the orthographic projection of the first opening 1511 of the base light absorbing layer 151 on the flat layer 152, so long as it is ensured that the additional light absorbing layer 190 can block the light path of the light rays with a large angle between the pixels.

In this regard, the opening area of the sixth opening 191 of the additional light absorbing layer 190 may be greater than the opening area of the pixel opening. Illustratively, the difference between the center-to-edge distance of the sixth opening 191 and the center-to-edge distance of the pixel opening may be between 1 μm and 6 μm, for example, the difference may be 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, etc.

It should be noted that, when the additional light absorbing layer 190 is disposed in the peep-proof display screen 100a, the color photoresist layer 157 (as shown in fig. 12) may not be disposed in the additional (corresponding to the first opening 1511 of the base light absorbing layer 151), and the additional light absorbing layer 190 may absorb the light with a large angle between the pixels, so as to achieve the effects of preventing crosstalk and light leakage. Of course, the color photoresist layer 157 may be disposed (corresponding to the first opening 1511 of the basic light absorbing layer 151), and the color photoresist layer 157 may absorb light of other colors to reduce the reflectivity of the peep-proof display 100 a.

Fig. 13 is an optical simulation contrast diagram of the peep-proof display screen provided in the embodiment of the application. Referring to fig. 13, the peep-proof display screen 100a provided in the third embodiment is taken as an example, and the brightness of the peep-proof display screen 100a in the embodiment of the present application is compared with the brightness of the conventional OLED display screen 100.

As can be seen from the figure, in this embodiment, by providing the peep-proof layer 150, the large-angle light emitted by the pixels is absorbed (blocked), so that the brightness of the peep-proof display screen 100a is sharply attenuated with the increase of the viewing angle. Wherein, at 45 ° viewing angle, the brightness of the peep-proof display screen 100a is 5% lower than that at 0 ° viewing angle (completely vertical front viewing angle); when the viewing angle increases to 50 °, the brightness of the privacy display 100a is almost 0. As can be seen, the peep-proof display screen 100a of the present embodiment has a good peep-proof effect.

The optical simulation results of the peep-proof display screen 100a provided in other embodiments can be compared with the optical simulation results of the peep-proof display screen 100a of the third embodiment, and will not be described again.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The terms first, second, third, fourth and the like in the description and in the claims of embodiments of the application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

Claims

1. A privacy display screen, comprising: the OLED device comprises a substrate, an OLED device layer, a packaging layer and a peep-proof layer, wherein the OLED device layer and the packaging layer are sequentially laminated on the substrate, and the peep-proof layer is arranged on the packaging layer;

the OLED device layer is provided with a plurality of pixels in an array manner, the peep-proof layer comprises a basic light absorption layer and a flat layer, the basic light absorption layer is provided with a plurality of first openings in an array manner, each first opening faces to each pixel opening of each pixel, and the flat layer covers the basic light absorption layer; the basic light absorption layer can absorb light rays emitted by the corresponding pixels.

2. The privacy display of claim 1, wherein the base light absorbing layer comprises a light blocking layer that is opaque.

3. The privacy display of claim 1, wherein the base light absorbing layer comprises a filter layer having a color different from a color corresponding to the pixel, the filter layer configured to absorb light emitted by the corresponding pixel.

4. A privacy display screen according to any one of claims 1 to 3, wherein the difference between the centre-to-edge distance of the first aperture and the centre-to-edge distance of the pixel aperture is-1 μm-3 μm.

5. A privacy display screen according to any one of claims 1 to 3, wherein the privacy layer further comprises a transparent first spacer layer disposed over the encapsulation layer, the base light absorbing layer being disposed over the first spacer layer.

6. The privacy display of claim 5, wherein the first spacer layer has a thickness of 8 μm to 20 μm.

7. The privacy display of claim 5, wherein the first spacer layer is a transparent ink layer.

8. The privacy display of claim 5, further comprising a touch layer, wherein the touch layer covers the encapsulation layer and the first isolation layer is disposed over the touch layer.

9. The privacy display of claim 5 or 8, wherein the privacy layer further comprises a high refractive layer, the high refractive layer is located above the encapsulation layer, the first isolation layer covers the high refractive layer, and the refractive index of the high refractive layer is higher than the refractive index of the first isolation layer;

The high-folding layer comprises a plurality of high-folding parts which are arranged in an array manner, and each high-folding part is opposite to each pixel opening; the top surface edge of the high-refraction part is provided with a light-gathering area, at least part of the light-gathering area is exposed in the first opening, and the light-gathering area is an arc surface protruding towards the periphery of the high-refraction part.

10. The privacy display screen of claim 9, wherein the high-refraction portion is a light-filtering portion, and the color of the light-filtering portion is the same as the color of the corresponding pixel.

11. The peep-proof display screen according to claim 8, wherein the touch layer is provided with a plurality of second openings arranged in an array, each second opening faces each pixel opening, the first isolation layer covers the touch layer and fills each second opening, and the refractive index of the touch layer is lower than that of the first isolation layer.

12. The privacy display of claim 8, wherein the privacy layer further comprises a second barrier layer and a first lower layer;

The first low-refraction layer covers the second isolation layer, the first low-refraction layer is provided with a plurality of third openings which are arranged in an array mode, each third opening is opposite to each pixel opening, the first isolation layer covers the first low-refraction layer and fills each third opening, and the refractive index of the first low-refraction layer is lower than that of the first isolation layer.

13. The privacy display of any of claims 1-12, further comprising an optical cement layer, a circular polarizer, and a cover plate, wherein the optical cement layer, the circular polarizer, and the cover plate are sequentially laminated on the privacy layer.

14. The privacy display of any of claims 1-12, wherein the privacy layer further comprises a color photoresist layer, the color photoresist layer comprises a plurality of photoresist portions arranged in an array, each of the photoresist portions is disposed corresponding to each of the first openings, and the color of each of the photoresist portions is the same as the color of the corresponding pixel.

15. The privacy display of claim 14, wherein each of the light blocking portions fills each of the first openings.

16. The privacy display of claim 15, further comprising a second low refractive layer covering the side walls of the base light absorbing layer and each of the first openings, the second low refractive layer having a refractive index lower than the refractive index of the color photoresist layer;

The second low-folding layer is provided with a plurality of fourth openings, each fourth opening is positioned in each first opening, and each light resistance part is filled in each fourth opening.

17. The privacy display of claim 14, further comprising a third lower layer, wherein the third lower layer has a plurality of fifth openings, each of the fifth openings facing the pixel opening of each of the pixels, each of the photoresist portions is filled in each of the fifth openings, and the basic light absorbing layer is disposed on the third lower layer.

18. The privacy display of claim 17, wherein the base light absorbing layer comprises a first filter layer having a color different from a color corresponding to the pixel.

19. The privacy display screen of claim 18, wherein the base light absorbing layer further comprises a second filter layer overlaying the first filter layer, the second filter layer having a color different from the color of the corresponding pixel and the second filter layer having a color different from the color of the first filter layer.

20. The privacy display of any of claims 17-19, wherein each of the light-blocking portions extends beyond the fifth opening and overlies the third lower layer, and the base light-absorbing layer overlies the light-blocking portions.

21. The privacy display of any of claims 14-20, further comprising an optical cement layer and a cover plate, the optical cement layer and the cover plate being laminated in sequence on the privacy layer.

22. The privacy display of any of claims 5-12, further comprising an additional light absorbing layer disposed on the light-exiting side of the pixel, the additional light absorbing layer being on a side of the base light absorbing layer facing the substrate;

23. The privacy display of claim 22, wherein the difference between the center-to-edge distance of the sixth opening and the center-to-edge distance of the pixel opening is 1 μιη -6 μιη.

24. The privacy display of claim 22 or 23, wherein the additional light absorbing layer is disposed over the encapsulation layer and the first spacer layer covers the additional light absorbing layer.

25. An electronic device comprising a housing and the privacy display of any of claims 1-24, the privacy display being attached to the housing.