Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel comprises: a substrate; a light-emitting layer arranged on one side of the substrate and comprising light-emitting pixels; and a peep-proof layer arranged on the side of the light-emitting layer away from the substrate and comprising first peep-proof blocks and second peep-proof blocks, wherein the first peep-proof blocks are located on the light-emitting path of the light-emitting pixels, the orthographic projection of the first peep-proof blocks on the substrate is located on the outer side of the orthographic projection of the light-emitting pixels on the substrate, and the orthographic projection of the light-emitting pixels on the substrate is distributed on two sides of the orthographic projection of the second peep-proof blocks on the substrate. According to the display panel of the present application, a peep-proofing effect can be achieved, and the distance between the peep-proof layer and the substrate is reduced, thereby reducing the thickness of the display panel.

Description

Display panel and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority based on Chinese patent application 2023109270503 filed on July 26, 2023, and all its contents are incorporated herein by reference.

Technical field

[0003] The present application relates to the field of display technology, and in particular to a display panel and a display device. [Background Technology]

[0004] In display technology, display panels have anti-peeping requirements, that is, the angle of the output light of the display panel is limited to a certain range, so that the complete display image can only be observed within a certain viewing angle range, and the display image cannot be observed outside the viewing angle range.

[0005] The inventors of the present application have discovered through research that current display panels with anti-peeping functions are generally thick, which is not conducive to achieving thinner and lighter display panels.

[0006] Application Contents

[0007] The present application provides a display panel and a display device, which can achieve privacy protection and reduce the distance between the privacy protection layer and the substrate, thereby reducing the thickness of the display panel.

[0008] The first technical solution provided in the present application is: providing a display panel, which includes: a substrate; a light-emitting layer, arranged on one side of the substrate, including light-emitting pixels; an anti-peeping layer, arranged on the side of the light-emitting layer away from the substrate, including a first anti-peeping block and a second anti-peeping block, the first anti-peeping block is located on the light output path of the light-emitting pixel, and the orthographic projection of the first anti-peeping block on the substrate is located outside the orthographic projection of the light-emitting pixel on the substrate, and the orthographic projection of the light-emitting pixel on the substrate is distributed on both sides of the orthographic projection of the second anti-peeping block on the substrate.

[0009] The second technical solution provided by the present application is: providing a display device, comprising a display panel as described in any one of the above items.

[0010] The beneficial effects of the present application are as follows: the display panel of the present application includes a substrate, a light-emitting layer, and an anti-peeping layer. The anti-peeping layer includes a first anti-peeping block and a second anti-peeping block. The first anti-peeping block is located in the light-emitting path of the light-emitting pixels, and the orthographic projection of the first anti-peeping block on the substrate is located outside the orthographic projection of the light-emitting pixels on the substrate. At the same time, the orthographic projection of the light-emitting pixels on the substrate is distributed on both sides of the orthographic projection of the second anti-peeping block on the substrate. The first anti-peeping block can block the side-view light emitted by the light-emitting pixels, thereby providing an anti-peeping effect. The second anti-peeping block can reduce the width of the pixel opening corresponding to the light-emitting pixels, thereby reducing the distance between the anti-peeping layer and the substrate, and ultimately reducing the thickness of the display panel.

Brief Description of the Drawings

[0011] FIG1 is a schematic structural diagram of an embodiment of a display panel of the present application;

[0012] FIG2 is a schematic diagram of the orthographic projection structure of the anti-peeping layer and the light-emitting layer in FIG1 on the substrate in an application scenario;

[0013] FIG3 is a schematic structural diagram of another embodiment of the display panel of the present application;

[0014] FIG4 is a schematic diagram of the orthographic projection structure of the privacy protection layer in FIG1 on the substrate in another application scenario;

[0015] FIG5 is a schematic structural diagram of an embodiment of a display device of the present application. [Specific implementation method]

[0016] 1 , in one embodiment, a display panel 100 includes a substrate 101, a light-emitting layer 102, a raised layer 103, and a privacy protection layer 104. The light-emitting layer 102 is disposed on one side of the substrate 101 and includes light-emitting pixels 1021. The raised layer 103 is located on a side of the light-emitting layer 102 facing away from the substrate 101. The privacy protection layer 104 is disposed on a side of the raised layer 103 facing away from the substrate 101 and includes a first privacy protection block 1041 and a second privacy protection block 1042. The first privacy protection block 1041 is located on a light-emitting path of the light-emitting pixel 1021, and an orthographic projection of the first privacy protection block 1041 on the substrate 101 is located outside the orthographic projection of the light-emitting pixel 1021 on the substrate 101. At the same time, the orthographic projections of the light-emitting pixel 1021 on the substrate 101 are distributed on both sides of the orthographic projection of the second privacy protection block 1042 on the substrate 101.

[0017] Specifically, the substrate 101, the light-emitting layer 102, the raised layer 103, and the anti-peep layer 104 are stacked in sequence. The display panel 100 can be, for example, an organic light-emitting display panel, a micro-light-emitting diode display panel, or other types of display panels. The substrate 101 can be a flexible substrate or a rigid substrate. A driving circuit is provided in the substrate 101. The driving circuit is used to drive the light-emitting pixels 1021 to emit light. The light-emitting pixels 1021 can be red pixels, green pixels, blue pixels, or white pixels, without limitation. The raised layer 103 serves to connect the light-emitting layer 102 and the anti-peep layer 104.

[0018] The first privacy block 1041 is located on the light-emitting path of the light-emitting pixel 1021 and can be used to block the light emitted by the light-emitting pixel 1021. However, the orthographic projection of the first privacy block 1041 on the substrate 101 is located outside the orthographic projection of the light-emitting pixel 1021 on the substrate 101, so that the first privacy block 1041 does not block the light emitted by the light-emitting pixel 1021 at the main viewing angle. In other words, the first privacy block 1041 can block the light emitted by the light-emitting pixel 1021 at a small viewing angle, so that the image displayed on the display panel 100 can only be observed from the main viewing angle, and cannot be observed from the side viewing angle, thereby playing an anti-peeping role and protecting privacy.

[0019] The orthographic projection of the first privacy block 1041 on the substrate 101 may surround the entire periphery of the orthographic projection of the luminous pixel 1021 on the substrate 101, or may only surround a portion of the periphery of the orthographic projection of the luminous pixel 1021 on the substrate 101. In short, as long as the orthographic projection of the first privacy block 1041 on the substrate 101 is located outside the orthographic projection of the luminous pixel 1021 on the substrate 101, it will be sufficient.

[0020] It is understandable that, as the size of the luminescent pixel 1021 increases, in order to maintain the same privacy protection effect, the distance between the privacy protection layer 104 and the substrate 101 must be increased, and the thickness of the display panel 100 must be increased, which is not conducive to the lightweight and thin development of the display panel 100. Therefore, the present application also provides a second privacy protection block 1042, so that the orthographic projection of the luminescent pixel 1021 on the substrate 101 is distributed on both sides of the orthographic projection of the second privacy protection block 1042 on the substrate 101. This is equivalent to using the second privacy protection block 1042 to divide the luminescent pixel 1021 into two parts, which is equivalent to reducing the size of the luminescent pixel 1021. This can achieve the same privacy protection effect without reducing the distance between the privacy protection layer 104 and the substrate 101. Moreover, under the premise that the size of the luminescent pixel 1021 remains unchanged, in order to ensure the same privacy protection effect, the distance between the privacy protection layer 104 and the substrate 101 can also be reduced, thereby reducing the thickness of the display panel 100 and achieving the lightweight and thin development of the display panel 100.

[0021] As can be seen from the above content, on the one hand, the present application sets the first anti-peeping block 1041, which can make the display panel 100 have an anti-peeping function. On the other hand, the setting of the second anti-peeping block 1042 can reduce the distance between the anti-peeping layer 104 and the substrate 101 while achieving the same anti-peeping effect, thereby reducing the thickness of the display panel 100 and realizing the lightweight and thin development of the display panel 100.

[0022] In other embodiments, the display panel 100 may not include the raising layer 103 .

[0023] 2 , in one embodiment, the orthographic projections of the light-emitting pixels 1021 distributed on both sides of the orthographic projection of the second privacy block 1042 on the substrate 101 have the same shape and size.

[0024] Specifically, the orthographic projection of the luminescent pixel 1021 includes a first orthographic projection 10211 and a second orthographic projection 10212. The first orthographic projection 10211 and the second orthographic projection 10212 are distributed on both sides of the orthographic projection of the second privacy block 1042 on the substrate 101. The shapes and sizes of the first orthographic projection 10211 and the second orthographic projection 10212 are the same, so that the luminous effect on both sides of the luminescent pixel 1021 is the same, which can improve the uniformity of the display. Of course, in other embodiments, the shapes and sizes of the first orthographic projection 10211 and the second orthographic projection 10212 can also be different, and can be set according to actual needs.

[0025] Referring to Figure 1, in one embodiment, the luminous pixel 1021 includes a first luminous sub-pixel 10213 and a second luminous sub-pixel 10214 of the same color. The orthographic projections of the first luminous sub-pixel 10213 and the second luminous sub-pixel 10214 on the substrate 101 are distributed on both sides of the orthographic projection of the second privacy block 1042 on the substrate 101, wherein the first luminous sub-pixel 10213 and the second luminous sub-pixel 10214 are connected to each other.

[0026] Specifically, the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 have the same color, and the two are connected and integrally formed. During preparation, the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 are formed in the same pixel opening area.

[0027] 3 , in another embodiment, the first light-emitting sub-pixel 10213 is spaced apart from the second light-emitting sub-pixel 10214. In this case, the colors of the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 remain the same, but the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 are insulated and spaced apart. During fabrication, the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 are formed in two different pixel opening regions.

[0028] In one embodiment, the orthographic projection of the first light-emitting sub-pixel 10213 on the substrate 101 and the orthographic projection of the second light-emitting sub-pixel 10214 on the substrate 101 have the same shape and size, which can ensure that the amount of light emitted from both sides of the second privacy block 1042 is the same, thereby improving the display uniformity of the display panel 100. Of course, in other embodiments, the shapes and sizes of the first light-emitting sub-pixel 10213 and the second light-emitting sub-pixel 10214 can also be different, and can be specifically set according to actual needs.

[0029] In one embodiment, the material of the privacy protection layer 104 includes an electrochromic material. When the voltage applied to the privacy protection layer 104 changes, the light transmittance of the privacy protection layer 104 changes.

[0030] Specifically, the transmittance of the electrochromic material changes with the applied voltage. The material of the anti-peeping layer 104 includes the electrochromic material, which can make the transmittance of the anti-peeping layer 104 adjustable, and thus whether the display panel 100 has an anti-peeping effect can be set according to needs. That is to say, when the display panel 100 is not required to have an anti-peeping function, the voltage applied to the anti-peeping layer 104 is adjusted to a first range. At this time, the transmittance of the anti-peeping layer 104 is high, and the light emitted by the luminous pixel 1021 can pass through the first anti-peeping block 1041, so that the light emitted by the luminous pixel 1021 can be observed regardless of the main viewing angle or the side viewing angle. At this time, the display panel 100 is in sharing mode; when the display panel 100 is required to have an anti-peeping function, the voltage applied to the anti-peeping layer 104 is adjusted to a second range. At this time, the transmittance of the anti-peeping layer 104 is low, and the light emitted by the luminous pixel 1021 cannot pass through the first anti-peeping block 1041. The first anti-peeping block 1041 plays an anti-peeping function, and the display panel 100 is in anti-peeping mode.

[0031] The electrochromic material includes at least one of tungsten oxide (WO3), niobium oxide (Nb2O5), and titanium oxide (TiO2). The electrochromic material may have a light transmittance that decreases or increases with increasing applied voltage. In short, this application does not limit the specific material of the electrochromic material, as long as its light transmittance can change with changes in applied voltage.

[0032] Of course, in other embodiments, the material of the anti-peeping layer 104 may also be a light-proof material. In this case, the display panel cannot switch between the sharing mode and the anti-peeping mode and is always in the anti-peeping mode.

[0033] Continuing with FIG. 2 , in the embodiment of FIG. 2 , there are multiple light-emitting pixels 1021, which are arranged into multiple pixel columns 1022. The orthographic projection of the first privacy block 1041 on the substrate 101 is a strip-shaped structure, and the orthographic projection of the first privacy block 1041 on the substrate 101 is distributed between the orthographic projections of two adjacent pixel columns 1022 on the substrate 101.

[0034] Specifically, since the orthographic projection of the first privacy block 1041 on the substrate 101 is distributed between the orthographic projections of two adjacent pixel columns 1022 on the substrate 101, the display panel 100 has an anti-peeping function in the arrangement direction of the multiple pixel columns 1022 (i.e., the X direction in Figure 2), but does not have an anti-peeping function in the direction perpendicular to the arrangement direction of the multiple pixel columns 1022 (i.e., the Y direction in Figure 2).

[0035] The orthographic projection of the first privacy block 1041 on the substrate 101 may be distributed between the orthographic projections of any two adjacent pixel columns 1022 on the substrate 101, or the orthographic projection of the first privacy block 1041 on the substrate 101 may be distributed between the orthographic projections of some two adjacent pixel columns 1022 on the substrate 101.

[0036] Continuing with FIG2 , the first privacy block 1041 extends in the same direction as the pixel columns 1022. This arrangement can reduce manufacturing difficulty. In other embodiments, the first privacy block 1041 can extend in a different direction than the pixel columns 1022, and this can be adjusted based on actual needs.

[0037] 2 , in one embodiment, the orthographic projection of the luminescent pixel 1021 on the substrate 101 is rectangular. In other embodiments, the orthographic projection of the luminescent pixel 1021 on the substrate 101 may also be triangular, circular, or other shapes. This application does not limit the shape of the luminescent pixel 1021.

[0038] 2 , in the embodiment of FIG. 2 , the orthographic projection of the second privacy block 1042 on the substrate 101 is a strip-shaped structure, and the orthographic projections of the light-emitting pixels 1021 in the same pixel column 1022 on the substrate 101 are distributed on both sides of the orthographic projection of the same second privacy block 1042 on the substrate 101.

[0039] Specifically, the second privacy block 1042 has the same shape as the first privacy block 1041 , and the light-emitting pixels 1021 in the same pixel column 1022 are divided by the same second privacy block 1042 .

[0040] Continuing with FIG2 , the second privacy block 1042 extends in the same direction as the pixel columns 1022, thereby reducing the difficulty of the manufacturing process. Of course, in other embodiments, the second privacy block 1042 can extend in a different direction than the pixel columns 1022, and this can be configured based on actual needs.

[0041] Referring to FIG. 4 , in the embodiment of FIG. 4 , there are a plurality of light-emitting pixels 1021 and a plurality of first privacy blocks 1041 , and the plurality of light-emitting pixels 1021 correspond one-to-one to the plurality of first privacy blocks 1041 . The first privacy blocks 1041 are provided with vias 10411 , and the orthographic projections of the vias 10411 on the substrate 101 cover the orthographic projections of the corresponding light-emitting pixels 1021 on the substrate 101 , and the second privacy blocks 1042 are located in the vias 10411 .

[0042] Specifically, the plurality of light-emitting pixels 1021 correspond one-to-one to the plurality of first privacy blocks 1041, so that light emitted by all light-emitting pixels 1021 can be blocked by the corresponding first privacy blocks 1041. The first privacy blocks 1041 are provided with vias 10411, allowing light from the light-emitting pixels 1021 to pass through the vias 10411. The orthographic projections of the vias 10411 on the substrate 101 cover the orthographic projections of the corresponding light-emitting pixels 1021 on the substrate 101. Unlike the embodiment shown in FIG. 2 , in this embodiment, the display panel 100 has a privacy protection function in all directions.

[0043] Continuing to refer to FIG4 , in the embodiment of FIG4 , the orthographic projection of the luminescent pixel 1021 on the substrate 101 is circular, and the via 10411 is a circular via. Of course, in other embodiments, the orthographic projection of the luminescent pixel 1021 on the substrate 101 may also be rectangular, in which case the via 10411 may also be a circular via. The present application does not impose any restrictions on the shape of the luminescent pixel 1021 or the shape of the via 10411. In the embodiment of FIG4 , multiple first privacy blocks 1041 are integrally formed, that is, multiple first privacy blocks 1041 are connected together. At this time, the first privacy block 1041 and the second privacy block 1042 may also be integrally formed. During preparation, a film layer may be first formed on the side of the cushioning layer 103 facing away from the substrate 101, and then multiple first privacy blocks 1041 and second privacy blocks 1042 may be formed by opening holes in the film layer.

[0044] Of course, the first privacy block 1041 and the second privacy block 1042 may not be integrally formed.

[0045] Continuing to refer to Figure 1, in one embodiment, the display panel 100 further includes a light-shielding layer 105, which is located between the anti-peep layer 104 and the light-emitting layer 102, specifically between the elevated layer 103 and the light-emitting layer 102, and includes a first light-shielding block 1051 and a second light-shielding block 1052. The orthographic projection of the first light-shielding block 1051 on the substrate 101 coincides with the orthographic projection of the first anti-peep block 1041 on the substrate 101, and the orthographic projection of the second light-shielding block 1052 on the substrate 101 coincides with the orthographic projection of the second anti-peep block 1042 on the substrate 101.

[0046] Specifically, in order to avoid light leakage, a light-shielding layer 105 including a first light-shielding block 1051 and a second light-shielding block 1052 is provided. At the same time, the first light-shielding block 1051 has the same size as the first anti-peep block 1041, and the second light-shielding block 1052 has the same size as the second anti-peep block 1042, that is, the orthographic projection of the first light-shielding block 1051 on the substrate 101 coincides with the orthographic projection of the first anti-peep block 1041 on the substrate 101, and the orthographic projection of the second light-shielding block 1052 on the substrate 101 coincides with the orthographic projection of the second anti-peep block 1042 on the substrate 101.

[0047] In other embodiments, the light-shielding layer 105 may include only the first light-shielding block 1051 but not the second light-shielding block 1052 , or may include only the second light-shielding block 1052 but not the first light-shielding block 1051 .

[0048] The light shielding layer 105 may be a light-proof material such as an electrochromic material or a black matrix.

[0049] The light shielding layer 105 may be a single-layer film layer or a multi-layer film layer. When it is a multi-layer film layer, each film layer may include a first light shielding block 1051 and a second light shielding block 1052 .

[0050] In other embodiments, when light leakage is not considered, the light shielding layer 105 may not be provided, or the light shielding layer 105 may be included, but the light shielding layer 105 only includes one of the first light shielding block 1051 and the second light shielding block 1052 .

[0051] Continuing with FIG. 1 , the display panel 100 further includes an encapsulation layer 106, which is positioned between the light-shielding layer 105 and the light-emitting layer 102. Encapsulation layer 106 comprises an insulating material such as polyimide. Encapsulation layer 106 reinforces and protects the light-emitting pixels 1021, preventing corrosion from external sources such as water and oxygen. Encapsulation layer 106 can be a single-layer structure or a stacked structure of multiple layers, without limitation.

[0052] In other embodiments, the encapsulation layer 106 may not be provided.

[0053] Continuing with FIG. 1 , in order to flatten the top of the display panel 100 , a fill layer 107 (OC, Oxide Conductor Fill) may be provided on the side of the privacy layer 104 facing away from the substrate 101 . The fill layer 107 may include an insulating material such as polyimide, and may fill local protrusions or depressions to improve the performance of the display panel 100 .

[0054] Referring to FIG. 5 , in one embodiment, a display device 200 includes a display panel 100 as described in any of the aforementioned embodiments. The display device 200 can be an electronic display device such as a mobile phone, a computer, or a television. Because the display device 200 includes the display panel 100 described in any of the aforementioned embodiments, the display device 200 also has the beneficial effects of privacy protection and a reduced thickness of the spacer layer.

Claims

1. A display panel, comprising: substrate; A light-emitting layer, disposed on one side of the substrate, comprising light-emitting pixels; The anti-peeping layer is arranged on the side of the light-emitting layer away from the substrate, and includes a first anti-peeping block and a second anti-peeping block, wherein the first anti-peeping block is located on the light-emitting path of the light-emitting pixel, and the orthographic projection of the first anti-peeping block on the substrate is located outside the orthographic projection of the light-emitting pixel on the substrate, and the orthographic projection of the light-emitting pixel on the substrate is distributed on both sides of the orthographic projection of the second anti-peeping block on the substrate.

2. The display panel according to claim 1, wherein: The shapes and sizes of the orthographic projections of the light-emitting pixels distributed on both sides of the orthographic projection of the second privacy protection block on the substrate on the substrate are correspondingly the same.

3. The display panel according to claim 1, wherein: The invention further comprises a padding layer, wherein the padding layer is located between the light-emitting layer and the anti-peeping layer.

4. The display panel according to claim 2, wherein: The light-emitting pixel comprises a first light-emitting sub-pixel and a second light-emitting sub-pixel of the same color, and the orthographic projections of the first light-emitting sub-pixel and the second light-emitting sub-pixel on the substrate are distributed on both sides of the orthographic projection of the second privacy protection block on the substrate; Wherein, the first light-emitting sub-pixel and the second light-emitting sub-pixel are connected to each other.

5. The display panel according to claim 2, wherein: The light-emitting pixel comprises a first light-emitting sub-pixel and a second light-emitting sub-pixel of the same color, and the orthographic projections of the first light-emitting sub-pixel and the second light-emitting sub-pixel on the substrate are distributed on both sides of the orthographic projection of the second privacy protection block on the substrate; Wherein, the first light-emitting sub-pixel and the second light-emitting sub-pixel are arranged at intervals.

6. The display panel according to claim 4, wherein: The orthographic projection of the first light-emitting sub-pixel on the substrate and the orthographic projection of the second light-emitting sub-pixel on the substrate have the same shape and size.

7. The display panel according to claim 1, wherein: The material of the anti-peeping layer includes an electrochromic material, and when the voltage applied to the anti-peeping layer changes, the light transmittance of the anti-peeping layer changes.

8. The display panel according to claim 1, wherein: The number of the light-emitting pixels is multiple, and the multiple light-emitting pixels are arranged into multiple pixel columns; The orthographic projection of the first privacy block on the substrate is a strip-shaped structure. The orthographic projections on the substrate are distributed between the orthographic projections of two adjacent pixel columns on the substrate.

9. The display panel according to claim 8, wherein: An extending direction of the first privacy protection block is the same as an extending direction of the pixel column.

10. The display panel according to claim 8, wherein: The orthographic projection of the light-emitting pixel on the substrate is rectangular.

11. The display panel according to claim 8, wherein: The orthographic projection of the second privacy protection block on the substrate is a strip-shaped structure, and the orthographic projections of the light-emitting pixels in the same pixel column on the substrate are distributed on both sides of the orthographic projection of the second privacy protection block on the substrate.

12. The display panel according to claim 11, wherein: An extending direction of the second privacy protection block is the same as an extending direction of the pixel column.

13. The display panel according to claim 1, wherein: There are multiple light-emitting pixels, there are multiple first privacy protection blocks, and the multiple light-emitting pixels correspond to the multiple first privacy protection blocks one by one; The first privacy block is provided with a via hole, the orthographic projection of the via hole on the substrate covers the orthographic projection of the corresponding light-emitting pixel on the substrate, and the second privacy block is located in the via hole.

14. The display panel according to claim 13, wherein: The orthographic projection of the light-emitting pixel on the substrate is circular and / or the via hole is a circular via hole.

15. The display panel according to claim 13, wherein: The plurality of first privacy protection blocks are integrally formed.

16. The display panel according to claim 15, wherein: The first anti-peeping blocks and the second anti-peeping blocks are integrally formed.

17. The display panel according to claim 2, wherein: The display panel further comprises: The light shielding layer is located between the anti-peeping layer and the light-emitting layer, and includes a first light shielding block, wherein the orthographic projection of the first light shielding block on the substrate coincides with the orthographic projection of the first anti-peeping block on the substrate.

18. The display panel according to claim 17, wherein: The light shielding layer further includes a second light shielding block, and the orthographic projection of the second light shielding block on the substrate coincides with the orthographic projection of the second anti-peeping block on the substrate.

19. The display panel according to claim 17, wherein: The display panel further includes: an encapsulation layer located between the light shielding layer and the light emitting layer.

20. A display device, wherein: Comprising the display panel as claimed in any one of claims 1 to 19.

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