OLED display panel and display device

Abstract

The invention discloses an OLED display panel and display equipment. The OLED display panel comprises a substrate; the pixel layer is located on the substrate; the optical adjusting layer is positioned on one side, deviating from the substrate, of the pixel layer; the optical adjustment layer comprises a quarter-wave plate and a linear polarizer located on the side, away from the substrate, of the quarter-wave plate. The optical adjusting layer comprises a transmission area and a shading area, and the shading area comprises a polarization structure located on the side, facing the substrate, of the linear polarizer. Therefore, the polarization structure is arranged in the shading area, so that the polarization direction of the light incident to the linear polaroid is changed and is perpendicular to the polarization direction of the linear polaroid in the shading area, the emission of large-angle light in the OLED display panel is avoided, and the peep-proof function of the display equipment is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an OLED display panel and a display device. BACKGROUND

[0002] At present, OLED (Organic Light-Emitting Diode) display devices are widely used in various electronic devices. In application scenarios such as mobile phones, vehicle displays, virtual reality, and augmented reality, the display device needs to have a certain anti-peeping effect to prevent others from peeping at the screen content from the side and protect user privacy. Therefore, how to realize the anti-peeping function of the display device has become a technical problem to be solved in the field. SUMMARY

[0003] Embodiments of the present application provide an OLED display panel and a display device to realize the anti-peeping function of the display device.

[0004] In a first aspect, embodiments of the present application provide an OLED display panel, comprising:

[0005] a substrate;

[0006] a pixel layer located above the substrate, the pixel layer comprising a plurality of sub-pixels;

[0007] an optical adjustment layer located on a side of the pixel layer away from the substrate, the optical adjustment layer comprising a quarter-wave plate and a linear polarizer located on a side of the quarter-wave plate away from the substrate;

[0008] The optical adjustment layer comprises a plurality of transmission regions corresponding to the sub-pixels one by one and a light-shielding region located between adjacent transmission regions, the orthographic projection of the transmission region on the pixel layer covers the light-emitting region of the corresponding sub-pixel, and the light-shielding region comprises a polarizing structure located on a side of the linear polarizer facing the substrate;

[0009] The polarizing structure comprises part of the quarter-wave plate located in the light-shielding region, and the polarizing structure is configured to convert incident light into linearly polarized light and emit the linearly polarized light, and the polarization direction of the emitted light is perpendicular to the polarization direction of the linear polarizer in the light-shielding region.

[0010] In a second aspect, embodiments of the present application provide a display device, comprising an OLED display panel as described in the first aspect above and a cover plate located above the OLED display panel.

[0011] The present application has the following advantages:

[0012] The embodiment of the present application provides a kind of OLED display panel and display equipment, comprising: substrate;Pixel layer, on the substrate;The pixel layer includes multiple sub-pixels;Optical adjustment layer, on the side of the pixel layer away from the substrate;The optical adjustment layer includes: quarter-wave plate and linear polaroid on the side of the quarter-wave plate away from the substrate;The optical adjustment layer includes: multiple transmission zones corresponding to the sub-pixel is set, and light shielding zone between adjacent transmission zones, the transmission zone on the pixel layer Orthogonal projection covers the light-emitting region of corresponding sub-pixel, and the light shielding zone includes polarizing structure on the side of the linear polaroid towards the substrate;The polarizing structure includes: part of the quarter-wave plate in the light shielding zone, and the polarizing structure is used for: in response to the light emitted by the pixel layer incidence, the incident light is converted into linearly polarized light exit, and the polarization direction of exit light and the polarization direction of linear polaroid in the light shielding zone are perpendicular to each other.Such, by setting polarizing structure in light shielding zone, the polarization direction of light incident to linear polaroid changes, and is perpendicular to the polarization direction of linear polaroid in light shielding zone, and the light incident to linear polaroid in light shielding zone is absorbed and cannot exit, avoid the exit of large-angle light in OLED display panel, to realize the privacy function of display equipment. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the cross-sectional view of the first display panel provided in the embodiment of the present application;

[0014] Figure 2 It is the top view of the display panel provided in the embodiment of the present application;

[0015] Figure 3 It is the cross-sectional view of the second display panel provided in the embodiment of the present application;

[0016] Figure 4 It is the light propagation schematic diagram in the display panel provided in the embodiment of the present application;

[0017] Figure 5 It is the light propagation schematic diagram in another display panel provided in the embodiment of the present application;

[0018] Figure 6 It is the cross-sectional view of the third display panel provided in the embodiment of the present application;

[0019] Figure 7 It is the cross-sectional view of the fourth display panel provided in the embodiment of the present application;

[0020] Figure 8 It is the cross-sectional view of the fifth display panel provided in the embodiment of the present application;

[0021] Figure 9 FIG. 7 is a schematic diagram of light propagation in a display panel according to an embodiment of the present application;

[0022] Figure 10 FIG. 8 is a sectional view of a display panel according to an embodiment of the present application;

[0023] Figure 11 FIG. 9 is a sectional view of a display panel according to an embodiment of the present application;

[0024] Figure 12 FIG. 10 is a sectional view of a display panel according to an embodiment of the present application;

[0025] Figure 13 FIG. 11 is a structural schematic diagram of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The specific embodiments of the OLED display panel and the display device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0027] The embodiments of the present application provide an OLED display panel, as shown in FIG. 1, which comprises: Figure 1

[0028] a substrate 100;

[0029] a pixel layer 200 located above the substrate 100, the pixel layer 200 comprising a plurality of sub-pixels 210;

[0030] an optical adjustment layer 300 located on a side of the pixel layer 200 away from the substrate 100, the optical adjustment layer 300 comprising a quarter-wave plate 310 and a linear polarizer 320 located on a side of the quarter-wave plate 310 away from the substrate 100;

[0031] The optical adjustment layer 300 comprises a plurality of transmission regions P corresponding to the sub-pixels 210 one by one, and a light-shielding region Q located between adjacent transmission regions P, the normal projection of the transmission region P on the pixel layer 200 covering the light-emitting region 211 of the corresponding sub-pixel 210, and the light-shielding region Q comprising a polarizing structure 330 located on a side of the linear polarizer 320 facing the substrate 100;

[0032] ​The polarization structure 330 includes the partial quarter-wave plate 310 in the light shielding area Q, and is configured to convert the incident light into linearly polarized light with a polarization direction perpendicular to that of the linear polarizer 320 in the light shielding area Q.

[0033] Thus, by arranging the polarization structure in the light shielding area, the polarization direction of the light incident on the linear polarizer is changed and is perpendicular to that of the linear polarizer in the light shielding area, so that the light incident on the linear polarizer in the light shielding area is absorbed and cannot be emitted, avoiding the emission of large-angle light in the OLED display panel, thereby achieving the privacy function of the display device. In addition, the optical adjustment layer further comprises a quarter-wave plate and a linear polarizer, and the external light incident on the linear polarizer is linearly polarized light, which is then converted into circularly polarized light by the quarter-wave plate. After reflection, the circularly polarized light is reversed, for example, left-handed circularly polarized light is reflected as right-handed circularly polarized light, and right-handed circularly polarized light is reflected as left-handed circularly polarized light. When the reversed circularly polarized light is incident on the quarter-wave plate again, the emitted light is linearly polarized light, and the polarization direction of the linearly polarized light is perpendicular to that of the linearly polarized light before reflection, so that the reflected linearly polarized light cannot be emitted from the linear polarizer, reducing the reflectivity of the OLED display panel and improving the display effect of the display device.

[0034] Although the optical adjustment layer includes a transmission area and a light shielding area, and part of the quarter-wave plate is located in the light shielding area, and the rest of the quarter-wave plate is located in the transmission area, this is only a division of the transmission area or the light shielding area according to the light transmission, and the quarter-wave plate itself is an integral layer, that is, the quarter-wave plate structure is consistent.

[0035] It should be understood that, as Figure 1 shown, the pixel layer 200 further comprises an encapsulation layer 220 between the sub-pixel 210 and the optical adjustment layer 300. The encapsulation layer 220 can protect the sub-pixel 210 and facilitate the arrangement of other structures on the encapsulation layer 220. In the OLED display panel, the small-angle light 1 emitted by the sub-pixel 210 can be incident on the transmission area P through the encapsulation layer 220 and then emitted from the OLED display panel to the outside, and the large-angle light 2 emitted by the sub-pixel 210 can be incident on the light shielding area Q through the encapsulation layer 220 and then be absorbed by the light shielding area Q, thereby achieving the privacy function of the display device.

[0036] Further, in order to clearly show the distribution of the transmission area and the light shielding area in the optical adjustment layer, as Figure 2 shown, Figure 2 is a top view of the OLED display panel from the side of the optical adjustment layer, and Figure 2The linear polarizer 320 can be seen, and other film layer structures are hidden and not shown. The linear polarizer 320 is divided into multiple regions, in which multiple transmission regions P are arranged in an array on the linear polarizer 320, and the remaining regions are light-blocking regions Q. The transmission regions P are arranged one-to-one with the sub-pixels of the pixel layer, and the size and shape of the transmission regions P change with the size and shape of the sub-pixels. For example, when the sub-pixel is large, the corresponding transmission region P is also large, and when the sub-pixel is circular, the corresponding transmission region P is also circular. Specifically, Figure 2 The sub-pixels shown in FIG. 3 are circular, and in order to improve the service life of the sub-pixels, the blue sub-pixel B is large, and the green sub-pixel G and the red sub-pixel R are small. Therefore Figure 2 The transmission regions P shown in FIG. 3 are also circular, and the transmission region P corresponding to the blue sub-pixel B is large, and the transmission regions P corresponding to the green sub-pixel G and the red sub-pixel R are small. In this way, the transmission regions P in the optical adjustment layer are arranged corresponding to the sub-pixels, which can enable the light emitted by the sub-pixels to exit from the transmission regions P, thereby improving the light efficiency of the OLED display panel.

[0037] In addition, in the transmission region P, a structure for changing the polarization state of light is also arranged on the side of the linear polarizer 320 facing the substrate 100, so that the light emitted by the sub-pixel 210 can exit from the transmission region P, thereby realizing normal display of the display device. This structure can be referred to as a second polarizing structure 340, and the polarizing structure 330 in the light-blocking region Q can also be referred to as a first polarizing structure 330. For the second polarizing structure 340, the polarization direction of the light exiting therefrom can be parallel to the polarization direction of the linear polarizer 320 in the transmission region P, or the polarization directions have an acute angle therebetween, or the exiting light is circularly polarized light, natural light, etc. At this time, the light emitted by the sub-pixel 210 can exit from the transmission region P, but the light transmittance is different. For example, when the polarization direction of the exiting light is parallel to the polarization direction of the linear polarizer 320, the exiting light can be transmitted from the linear polarizer 320, thereby realizing high light transmittance. When the polarization direction of the exiting light and the polarization direction of the linear polarizer 320 have an acute angle therebetween, part of the exiting light will be absorbed by the linear polarizer 320, thereby realizing low light transmittance. When the exiting light is circularly polarized light or natural light, part of the exiting light will also be absorbed by the linear polarizer 320, the exiting light will become linearly polarized light, and the light transmittance is also low.

[0038] Therefore, the first polarizing structure can convert the incident light into linearly polarized light when the light emitted by the pixel layer is incident, and the polarization direction of the emitted light is perpendicular to the polarization direction of the linear polarizer in the light shielding area; the second polarizing structure can make the emitted light completely or partially pass through the linear polarizer in the transmission area, thereby ensuring the normal display of the display device while realizing the privacy function of the display device. There are various settings for the OLED display panel to achieve the above effects, which will be introduced below.

[0039] First, the structure of the OLED display panel when the emitted light can completely pass through the linear polarizer in the transmission area is introduced. At this time, while realizing the privacy function of the display device, the light efficiency of the OLED display panel can also be improved, thereby reducing the power consumption of the display device.

[0040] Alternatively, as shown in Figure 1 The polarization direction of the linear polarizer 320 in the transmission area P is perpendicular to the polarization direction of the linear polarizer 320 in the light shielding area Q. In this way, by controlling the polarization direction of the linear polarizer 320, the linearly polarized light emitted by the quarter-wave plate 310 can be emitted from the linear polarizer 320 in the transmission area P and absorbed by the linear polarizer 320 in the light shielding area Q, avoiding the emission of large-angle light in the OLED display panel, thereby realizing the privacy function of the display device.

[0041] Alternatively, as shown in Figure 3 The polarization direction of the linear polarizer 320 is consistent; the polarizing structure 330 further comprises a half-wave plate 331 between the linear polarizer 320 and the quarter-wave plate 310. In this way, by arranging the half-wave plate 331 in the first polarizing structure 330, the polarization directions of the light emitted by the first polarizing structure 330 and the second polarizing structure 340 are perpendicular to each other, so that the linearly polarized light in the transmission area P can be emitted from the linear polarizer 320, while the linearly polarized light in the light shielding area Q is absorbed by the linear polarizer 320, avoiding the emission of large-angle light in the OLED display panel, thereby realizing the privacy function of the display device.

[0042] In addition, as shown in Figure 3As shown, in the second polarizing structure 340, the film layer in which the half-wave plate 331 is located can be provided with the first optical adhesive 341, so that the first optical adhesive 341 can fill the pores in the film layer in which the half-wave plate 331 is located, eliminate air gaps, and improve the transmittance of the light emitted by the sub-pixel 210 at the transmission area P. Alternatively, the film layer in which the half-wave plate 331 is located can be made of the same material throughout, which realizes the function of the half-wave plate 331 in the area where the first polarizing structure 330 is located, and realizes normal transmission of light in the area where the second polarizing structure 340 is located, so that the first optical adhesive 341 does not need to be filled after the half-wave plate 331 is arranged, and the process complexity of the OLED display panel can be reduced.

[0043] It should be understood that, in some embodiments, the light incident to the linear polarizer is linearly polarized light, for example Figure 1 or Figure 3 As shown in the structure of the OLED display panel, the light incident to the quarter-wave plate should be circularly polarized light, so that the quarter-wave plate can convert the circularly polarized light into linearly polarized light.

[0044] Alternatively, the way to realize that the light incident to the quarter-wave plate is circularly polarized light can be that the light emitted by the pixel layer is circularly polarized light. The handedness of the circularly polarized light emitted by the pixel layer needs to be matched with the quarter-wave plate and the linear polarizer, so that after the circularly polarized light is converted into linearly polarized light by the quarter-wave plate, the polarization direction of the linearly polarized light is the same as that of the linear polarizer in the transmission area. In this way, the circularly polarized light can be incident to the quarter-wave plate without the need to arrange an additional film layer, thereby reducing the thickness of the OLED display panel and improving the portability of the display device.

[0045] Of course, when the light adjusting structure is provided with a half-wave plate, the polarization direction of the linearly polarized light after the circularly polarized light is converted by the quarter-wave plate is not limited to being the same as that of the linear polarizer in the transmission area, but can also be perpendicular to that of the linear polarizer in the transmission area. Correspondingly, the half-wave plate is arranged in the second polarizing structure instead of the first polarizing structure, so that under the action of the half-wave plate, the polarization direction of the linearly polarized light emitted by the first polarizing structure is the same as that of the linear polarizer, so that the linearly polarized light in the transmission area can be emitted from the linear polarizer, and the linearly polarized light in the light-shielding area can be absorbed by the linear polarizer. Also, the emission of the light at a large angle in the OLED display panel can be avoided, thereby realizing the anti-peeping function of the display device.

[0046] Alternatively, when the light emitted by the pixel layer is circularly polarized light, the light-emitting material in the pixel layer includes chiral light-emitting molecules or light-emitting molecules with chiral groups, such as spirobifluorene, chiral metal complexes, chiral polymers, etc.

[0047] Specifically, as shown in Figure 4 the film layer in which the quarter-wave plate 321 is located can be provided with the first optical adhesive 341, so that the first optical adhesive 341 can fill the pores in the film layer in which the quarter-wave plate 321 is located, eliminate air gaps, and improve the transmittance of the light emitted by the sub-pixel 210 at the transmission area P.Figure 4 Figure 1 shows a schematic diagram of light propagation in an OLED display panel according to an embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 1 Figure 2 shows a schematic diagram of light propagation in the transmissive region of the OLED display panel according to an embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 4 In (a) of Figure 2, circularly polarized light a1 is emitted from the sub-pixel 210, and the circularly polarized light a1 is converted into linearly polarized light a2 after being incident on the quarter-wave plate 310. The linearly polarized light a2 has the same polarization direction as the linear polarizer 320 in the transmissive region, so the linearly polarized light a2 can be emitted from the linear polarizer 320. Figure 4 In (b) of Figure 2, circularly polarized light b1 is emitted from the sub-pixel 210, and the circularly polarized light b1 is converted into linearly polarized light b2 after being incident on the quarter-wave plate 310. The linearly polarized light b2 has a polarization direction perpendicular to the linear polarizer 320 in the light-blocking region, so the linearly polarized light b2 is absorbed by the linear polarizer 320. No light is emitted from the light-blocking region, which avoids the emission of large-angle light in the OLED display panel, thereby achieving the anti-peeping function of the display device.

[0048] Figure 3 shows a schematic diagram of light propagation in an OLED display panel according to another embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 5 Figure 4 shows a schematic diagram of light propagation in the transmissive region of the OLED display panel according to another embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 5 In (a) of Figure 4, circularly polarized light c1 is emitted from the sub-pixel 210, and the circularly polarized light c1 is converted into linearly polarized light c2 after being incident on the quarter-wave plate 310. The linearly polarized light c2 has the same polarization direction as the linear polarizer 320, so the linearly polarized light c2 can be emitted from the linear polarizer 320. Figure 3 In (b) of Figure 4, circularly polarized light d1 is emitted from the sub-pixel 210, and the circularly polarized light d1 is converted into linearly polarized light d2 after being incident on the quarter-wave plate 310. The linearly polarized light d2 is converted into linearly polarized light d3 after being incident on the half-wave plate 331, and the linearly polarized light d3 has a polarization direction perpendicular to the linear polarizer 320. Thus, the linearly polarized light d3 is absorbed by the linear polarizer 320. No light is emitted from the light-blocking region, which avoids the emission of large-angle light in the OLED display panel, thereby achieving the anti-peeping function of the display device. Figure 5 Figure 5 Optionally, the way in which the light incident on the quarter-wave plate is circularly polarized light can also be as shown in Figures 5 and 6. Figure 5 shows a schematic diagram of light propagation in an OLED display panel according to another embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel.

[0049] Figure 6 shows a schematic diagram of light propagation in the transmissive region of the OLED display panel according to another embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 6 Figure 7 shows a schematic diagram of light propagation in the light-blocking region of the OLED display panel according to another embodiment of the present application. The direction indicated by F1 is the light-out direction of the OLED display panel. Figure 7 Optionally, the way in which the light incident on the quarter-wave plate is circularly polarized light can also be as shown in Figures 5 and 6.

[0050] In this way, by setting the first circular polarizer on the entire layer, the light emitted from the pixel layer is circularly polarized when it is incident on the quarter-wave plate. Then, through other film layers in the optical adjustment layer, light absorption in the light-shielding area and light transmission in the transmission area are achieved, thus avoiding the emission of large-angle light in the OLED display panel and realizing the privacy function of the display device.

[0051] It should be understood that in the two methods described above for achieving circularly polarized light incident on the quarter-wave plate, the light propagation process is essentially the same. The only difference is that when the sub-pixel directly emits circularly polarized light, no conversion by the first circular polarizer is required, and the circularly polarized light can be directly incident on the quarter-wave plate. When the first circular polarizer is provided, the light emitted by the sub-pixel is natural light, which is converted into circularly polarized light after passing through the first circular polarizer, thus achieving circularly polarized light incident on the quarter-wave plate. Therefore, the specific light propagation process when the entire layer is equipped with the first circular polarizer can be referred to the specific light propagation process when the first circular polarizer is not provided, and will not be repeated here.

[0052] Next, we will introduce the structure of an OLED display panel when the emitted light can partially pass through the linear polarizer in the transmission region.

[0053] Optionally, such as Figure 8 As shown, the polarization direction of the entire linear polarizer 320 is consistent; the polarization structure 330 also includes a second circular polarizer 332 located between the quarter-wave plate 310 and the pixel layer 200. The light emitted from the pixel layer 200 becomes circularly polarized light after passing through the circular polarizer 332. The rotation direction of this circularly polarized light needs to be coordinated with the quarter-wave plate 310 and the linear polarizer 320 so that after the circularly polarized light is converted into linearly polarized light by the quarter-wave plate 310, the polarization direction of this linearly polarized light is perpendicular to the polarization direction of the linear polarizer 320.

[0054] Thus, by setting a second circular polarizer in the polarization structure, the light emitted from the pixel layer is converted into linearly polarized light after passing through the polarization structure, and the polarization direction of the linearly polarized light is perpendicular to the polarization direction of the linear polarizer. As a result, the linearly polarized light is absorbed by the linear polarizer and cannot be emitted from it, thus avoiding the emission of large-angle light from the OLED display panel and achieving the privacy function of the display device.

[0055] In addition, such as Figure 8As shown, in the second polarizing structure 340, the film layer in which the second circular polarizer 332 is located can be provided with a second optical adhesive 342, so that the second optical adhesive 342 can fill the pores in the film layer in which the second circular polarizer 332 is located, eliminate air gaps, and improve the transmittance of the light emitted by the sub-pixel 210 at the transmission region P. Alternatively, the film layer in which the second circular polarizer 332 is located can be made of a uniform material throughout the layer. The film layer realizes the function in the region where the first polarizing structure 330 is located, and realizes normal transmission of light in the region where the second polarizing structure 340 is located. Therefore, after the second circular polarizer 332 is provided, the second optical adhesive 342 does not need to be filled, which can reduce the process complexity of the OLED display panel.

[0056] Specifically, as shown in FIG. 4, Figure 9 As shown in FIG. 4, Figure 9 As shown in FIG. 4, Figure 8 FIG. 4 is a schematic diagram of light propagation in the OLED display panel with the structure shown in FIG. 3, and F1 indicates the light-emitting direction of the OLED display panel. Figure 4 In (a) of FIG. 4, natural light e1 is emitted from the sub-pixel 210, and the macroscopic polarization state of the natural light e1 does not change after the natural light e1 is incident on the quarter-wave plate 310. It can be considered that the emitted light is still natural light e1. Then, the natural light e1 is incident on the linear polarizer 320, and the light in the natural light e1 that is perpendicular to the polarization direction of the linear polarizer 320 is absorbed, and linearly polarized light e2 that is parallel to the polarization direction of the linear polarizer 320 is emitted from the linear polarizer 320; Figure 9 In (b) of FIG. 4, natural light f1 is emitted from the sub-pixel 210, and the natural light f1 is converted into circularly polarized light f2 after being incident on the second circular polarizer 332. The circularly polarized light f2 is converted into linearly polarized light f3 after being incident on the quarter-wave plate 310, and the linearly polarized light f3 is perpendicular to the polarization direction of the linear polarizer 320. Therefore, the linearly polarized light f3 is absorbed by the linear polarizer 320, and no light is emitted in the light-blocking region, which avoids the emission of large-angle light in the OLED display panel, thereby realizing the anti-peeping function of the display device.

[0057] Optionally, as shown in FIG. 5, Figure 10 As shown in FIG. 5, the OLED display panel further includes an anti-peeping layer 400 located between the optical adjustment layer 300 and the pixel layer 200. In which, the light emitted by the sub-pixel 210 has different paths. Small-angle light 3 emitted by the sub-pixel 210 passes through the anti-peeping layer 400 and the optical adjustment layer 300 and is emitted. Larger-angle light 4 emitted by the sub-pixel 210 passes through the anti-peeping layer 400 but is absorbed by the optical adjustment layer 300 and cannot be emitted. Larger-angle light 5 emitted by the sub-pixel 210 is directly absorbed by the anti-peeping layer and cannot be emitted.

[0058] Therefore, by arranging the privacy layer, the cooperation between the optical adjustment layer and the privacy layer is achieved, the absorption effect of the light with large angle is improved, and the privacy effect of the display device is further improved.

[0059] Further, as shown in Figure 10 , the privacy layer 400 comprises: a light shielding layer 401 and a plurality of lens structures 402 located above the pixel layer 210, and a flat layer 403 covering the light shielding layer 401 and the plurality of lens structures 402, the light shielding layer 401 comprises a plurality of openings arranged one-to-one with the sub-pixels 210, and the plurality of lens structures 402 are respectively located in the openings, the lens structure 402 is in the shape of a convex lens, the convex surface of the lens structure 402 is convex to the optical adjustment layer 300, and the refractive index of the lens structure 402 is greater than the refractive index of the flat layer 403.

[0060] Therefore, the light shielding layer in the privacy layer can absorb light, thereby improving the privacy effect of the display device, and the lens structure can deflect light, thereby improving the forward light emission of the OLED display panel, improving the light efficiency of the OLED display panel, and reducing the energy consumption of the display device.

[0061] Of course, the privacy layer is not limited to the structure described above, and other structures can also be used, for example, only the light shielding layer and the flat layer are arranged, thereby simplifying the structure of the privacy layer, or the controllable liquid crystal layer is used to realize the privacy layer, the liquid crystal molecules are rearranged under the action of the electric field, only the light with a small angle in the front is allowed to pass, and the light with a large angle is blocked or scattered, thereby realizing the privacy effect. The specific arrangement form of the privacy layer can be selected as needed, and is not limited here.

[0062] In addition, as shown in Figure 10 , the pixel layer 200 in the OLED display panel specifically comprises: a TFT layer 201 located on the substrate 100, an anode 202 located on the side of the TFT layer 201 away from the substrate, and a pixel definition layer 203 located on the side of the anode 202 away from the substrate 100. The pixel definition layer 203 is provided with a plurality of openings, the openings are filled with a light emitting layer 204, and a cathode 205 covers the light emitting layer 204. Among them, the pixel definition layer 203 is used to divide each sub-pixel 210, and the TFT layer 201 is used to provide an electric signal for each sub-pixel 210, so that the electric signal excites the light emitting layer 204 to emit light through the anode 202 and the cathode 205 on both sides of the light emitting layer 204, thereby realizing the light emission of the sub-pixel 210. When the optical adjustment layer 300 adopts other structures described above, such as the structure of the optical adjustment layer shown in Figure 3 , the structure of the display panel can be as shown in Figure 11 , when the optical adjustment layer adopts the structure shown in Figure 8 , the structure of the display panel can be as shown in Figure 12 .Figure 6 or Figure 7 The specific structure of the display panel is similar when the structure of the optical adjustment layer is as shown in

[0063] Specifically, the process of manufacturing the OLED display panel as shown in Figure 10 may include:

[0064] Step 1, manufacturing the TFT layer 201 according to the position of the light-emitting area of the OLED display panel on the substrate 100;

[0065] Step 2, manufacturing the patterned anode 202 on the TFT layer 201;

[0066] Step 3, manufacturing the light-emitting layer 204 on the anode 202 using chiral light-emitting molecules or light-emitting molecules with chiral groups;

[0067] Step 4, after manufacturing the pixel layer 200, sequentially manufacturing the anti-peep layer 400 and the optical adjustment layer 300 on the pixel layer 200.

[0068] Of course, when the optical adjustment layer of the OLED display panel does not need the pixel layer to emit circularly polarized light, such as using the optical adjustment layer structure in Figure 6 , Figure 7 or Figure 8 , the material for manufacturing the light-emitting layer in the above step 3 can use a material capable of emitting natural light.

[0069] Based on the same inventive concept, the embodiments of the present application also provide a display device, the implementation principle of which is similar to that of the aforementioned OLED display panel, and the specific implementation manner of the display device can be referred to the aforementioned embodiments of the display panel, and the repeated parts will not be described herein.

[0070] Specifically, the display device provided by the embodiments of the present application, as shown in Figure 13 , includes the OLED display panel 1301 as introduced in the above content, and the cover plate 1302 located above the OLED display panel 1301.

[0071] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An OLED display panel, characterized in that, The display panel comprises: a substrate; a pixel layer located on the substrate; the pixel layer comprises a plurality of sub-pixels; an optical adjustment layer located on a side of the pixel layer away from the substrate; the optical adjustment layer comprises a quarter-wave plate and a linear polarizer located on a side of the quarter-wave plate away from the substrate; the optical adjustment layer comprises a plurality of transmission regions arranged one-to-one corresponding to the sub-pixels and a light-blocking region located between adjacent transmission regions, a normal projection of the transmission region on the pixel layer covers a light-emitting region of the corresponding sub-pixel, and the light-blocking region comprises a polarizing structure located on a side of the linear polarizer facing the substrate; the polarizing structure comprises part of the quarter-wave plate located in the light-blocking region, and the polarizing structure is configured to convert incident light into linearly polarized light and emit the linearly polarized light, and the polarization direction of the emitted light is perpendicular to the polarization direction of the linear polarizer in the light-blocking region. 2.The OLED display panel of claim 1, wherein, The polarization direction of the linear polarizer in the transmission region is perpendicular to the polarization direction of the linear polarizer in the light-blocking region. 3.The OLED display panel of claim 1, wherein, The polarization direction of the entire linear polarizer is uniform; and the polarizing structure further comprises a half-wave plate located between the linear polarizer and the quarter-wave plate. 4.The OLED display panel of claim 2 or 3, wherein, The light emitted by the pixel layer is circularly polarized light. 5.The OLED display panel of claim 4, wherein, The light-emitting material in the pixel layer comprises chiral light-emitting molecules or light-emitting molecules with chiral groups. 6.The OLED display panel of claim 2 or 3, wherein, The optical adjustment layer further comprises a first circular polarizer arranged integrally between the quarter-wave plate and the pixel layer; and the polarizing structure further comprises part of the first circular polarizer located in the light-blocking region. 7.The OLED display panel of claim 1, wherein, The polarization direction of the entire linear polarizer is uniform; and the polarizing structure further comprises a second circular polarizer located between the quarter-wave plate and the pixel layer. 8.The OLED display panel of claim 1, wherein, The display panel further comprises an anti-peep layer located between the optical adjustment layer and the pixel layer. 9.The OLED display panel of claim 8, wherein, The anti-peep layer comprises a light-blocking layer and a plurality of lens structures located on the pixel layer, and a flat layer covering the light-blocking layer and the plurality of lens structures, the light-blocking layer comprises a plurality of openings arranged one-to-one corresponding to the sub-pixels, the plurality of lens structures are respectively located in the openings, the lens structure has a convex lens shape, the convex surface of the lens structure faces the optical adjustment layer, and the refractive index of the lens structure is greater than the refractive index of the flat layer.

10. A display device, characterized by comprising: The display panel comprises: the OLED display panel according to any one of claims 1-9, and a cover plate located on the OLED display panel.

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