Display panel and display device

Abstract

The application relates to the technical field of display, and discloses a display panel and a display device. The display panel comprises a substrate, a light-emitting layer located on one side of the substrate, an encapsulation layer located on the side, away from the substrate, of the light-emitting layer, a touch layer located on the side, away from the encapsulation layer, of the light-emitting layer, and a color resistance layer located on the side, away from the encapsulation layer, of the touch layer; the touch layer comprises a touch metal layer located on the side, away from the substrate, of the encapsulation layer and a first insulating layer located between the touch metal layer and the color resistance layer, wherein the first insulating layer is an inorganic insulating layer. Compared with the prior art, the display panel and the display device provided by the embodiment of the application have the advantage of solving the problem of too fast luminance decay under a large screen viewing angle.

Description

TECHNICAL FIELD

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

[0002] Organic Light-Emitting Diode (OLED) panel is widely concerned due to its self-luminous, low power consumption, thinness, bendability, bright color, high contrast, fast response rate and other advantages, and is becoming the representative of the next generation of display and gradually replacing Liquid Crystal Display (LCD) screen.

[0003] Therefore, in order to develop new OLED display products, the research scheme is to make a color filter on the encapsulation layer (COE) to replace the polarizing plate.

[0004] However, the inventors of the present application found that the COE technology in the prior art has the problem of too fast luminance decay at large screen viewing angle when applied to a touch screen. SUMMARY

[0005] The embodiments of the present application provide a display panel, a manufacturing method thereof and a display device, which solve the problem of too fast luminance decay at large screen viewing angle.

[0006] To solve the above technical problems, the first aspect of the present application provides a display panel, comprising: a substrate, a light-emitting layer located on one side of the substrate, an encapsulation layer located on a side of the light-emitting layer away from the substrate, a touch layer located on a side of the encapsulation layer away from the light-emitting layer, and a color resistance layer located on a side of the touch layer away from the encapsulation layer.

[0007] The touch layer comprises a touch metal layer located on a side of the encapsulation layer away from the substrate; and further comprises a first insulating layer located between the touch metal layer and the color resistance layer, wherein the first insulating layer is an inorganic insulating layer.

[0008] Optionally, the thickness of the first insulating layer is less than 3 microns.

[0009] Optionally, the thickness of the first insulating layer is greater than 0.1 microns and less than 0.5 microns.

[0010] Optionally, the material of the first insulating layer is silicon oxide, silicon nitride or silicon oxynitride.

[0011] The refractive index of the first insulating layer is greater than 1.45 and less than 2.55.

[0012] Optionally, the light-emitting layer comprises a plurality of light-emitting pixel units, the plurality of light-emitting pixel units comprising a plurality of red pixel units and a plurality of green pixel units.

[0013] The first insulating layer comprises a first region and a second region arranged at intervals.

[0014] In a direction perpendicular to the display panel, the first region overlaps the red pixel units, and the second region overlaps the green pixel units; the thickness of the first region is greater than the thickness of the second region.

[0015] Optionally, the plurality of light-emitting pixel units further comprise a plurality of blue pixel units, the first insulating layer comprises a third region overlapping the blue pixel units in a direction perpendicular to the substrate, and the thickness of the second region is greater than the thickness of the third region.

[0016] Optionally, the light-emitting layer comprises a plurality of light-emitting pixel units.

[0017] The color resistance layer comprises a light-shielding element and a plurality of light-filtering elements, the light-shielding element comprises a plurality of hollow holes, and the light-filtering elements are arranged one-to-one in the hollow holes.

[0018] The light-filtering elements are arranged one-to-one with the light-emitting pixel units.

[0019] Optionally, the touch metal layer comprises a first touch metal layer close to the light-emitting layer, a second touch metal layer close to the color resistance layer, and a second insulating layer between the first touch metal layer and the second touch metal layer.

[0020] The orthographic projection of the first touch metal layer on the substrate overlaps the orthographic projection of the light-shielding element on the substrate.

[0021] The orthographic projection of the second touch metal layer on the substrate overlaps the orthographic projection of the light-shielding element on the substrate.

[0022] Optionally, the second insulating layer is an inorganic insulating layer, and the material of the second insulating layer is silicon oxide or silicon nitride or silicon oxynitride.

[0023] The refractive index of the second insulating layer is greater than 1.45 and less than 2.55.

[0024] The thickness of the second insulating layer is less than 3 microns.

[0025] Optionally, a third insulating layer is further arranged between the encapsulation layer and the touch layer, the material of the third insulating layer is silicon oxide or silicon nitride or silicon oxynitride, the refractive index of the third insulating layer is greater than 1.45 and less than 2.55, and the thickness of the third insulating layer is less than 3 microns.

[0026] According to another aspect of the present application, there is provided a display device comprising a power supply component and any of the display panels described above, the power supply component being configured to supply power to the display panel.

[0027] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects: effectively increasing the exit angle of the light emitted by the light-emitting layer on the color resistance layer, thereby improving the problem of rapid brightness decay under large viewing angle of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a display panel provided by a first embodiment of the present application;

[0029] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present application;

[0030] Figure 3 is a structural schematic diagram of a display panel provided by an embodiment of the present application;

[0031] Figure 4 is a structural schematic diagram of a display panel provided by an embodiment of the present application. DETAILED DESCRIPTION

[0032] To make the objectives, technical schemes and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, the technical scheme claimed by the present application can be realized even without these technical details and various changes and modifications based on the following embodiments.

[0033] The first embodiment of the present application relates to a display panel, such as Figure 1 As shown in the figure, the display panel comprises a substrate 10, a light-emitting layer 20 located on one side of the substrate 10, an encapsulation layer 30 located on the side of the light-emitting layer 20 away from the substrate 10, a touch layer 40 located on the side of the encapsulation layer 30 away from the light-emitting layer 20, and a color resistance layer 50 located on the side of the touch layer 40 away from the encapsulation layer 30. The touch layer 40 comprises a touch metal layer 41 located on the side of the encapsulation layer 30 away from the substrate 10, and the touch layer 40 further comprises a first insulating layer 42 located between the touch metal layer 41 and the color resistance layer 50, wherein the first insulating layer 42 is an inorganic insulating layer.

[0034] Compared with the prior art, the first insulating layer 42 in the display panel provided by the first embodiment of the present application is an inorganic layer. In the preparation process, the inorganic insulating layer of inorganic material can be prepared by using a chemical vapor deposition method, while the first insulating layer 42 in the prior art is usually prepared by using a coating method. Compared with the preparation method of the organic layer such as coating, the preparation method of the inorganic layer such as chemical vapor deposition can prepare the inorganic insulating layer 42 to be thinner, thereby reducing the distance between the light-emitting layer 20 and the color resistance layer 50. The reduction of the distance can effectively increase the exit angle of the light emitted by the light-emitting layer 20 on the color resistance layer 50, thereby improving the problem of rapid brightness decay of the display panel under large viewing angle. In addition, the first insulating layer 42 of inorganic material has better water resistance, which can reduce the corrosion of external moisture on the touch metal layer 41. Moreover, the first insulating layer 42 of inorganic material contains less hydrogen element itself, and will not cause corrosion to the touch metal layer 41 made of metal, thereby solving the water corrosion problem of the touch layer.

[0035] Specifically, the first insulating layer 42 has a thickness less than 3 microns. Preferably, in the embodiment, the thickness of the first insulating layer 42 is greater than 0.1 microns and less than 0.5 microns. If the thickness of the first insulating layer 42 is too small, the protection effect on the touch metal layer 41 will be reduced. If the thickness of the first insulating layer 42 is too large, the brightness decay of the display panel under large viewing angle will still be fast. Setting the thickness of the first insulating layer 42 to be greater than 0.1 microns and less than 0.5 microns can ensure the protection effect on the touch metal layer 41, while effectively improving the problem of rapid brightness decay of the display panel under large viewing angle.

[0036] Specifically, in the embodiment, the material of the first insulating layer 42 is silicon oxide or silicon nitride or silicon oxynitride. It can be understood that the material of the first insulating layer 42 being silicon oxide or silicon nitride or silicon oxynitride is only a specific example in the embodiment, and does not constitute a limitation. In other embodiments of the present application, the first insulating layer 42 can also be other materials such as metal oxide, which can be flexibly set according to actual needs. In addition, it should be noted that in order to ensure the water resistance of the first insulating layer 42, the denser the material of the first insulating layer 42 is, the better the water resistance will be, and the better the protection of the touch metal layer 41 will be. For example, when the material of the first insulating layer 42 is silicon nitride among silicon oxide or silicon nitride or silicon oxynitride, the water resistance is better.

[0037] Further, in the embodiment, the refractive index of the first insulating layer is greater than 1.45 and less than 2.55.

[0038] In the embodiment, as shown in FIG. 1, the display panel comprises a substrate 10, a light-emitting layer 20, a first insulating layer 42, a color resistance layer 50, a second insulating layer 52, a touch metal layer 41 and a protective layer 60. Figure 1As shown, the light-emitting layer 20 includes a plurality of light-emitting pixel units of different colors, such as red light-emitting pixel units 211, green light-emitting pixel units 212, and blue light-emitting pixel units 213, and a pixel defining layer 22. The color resist layer 50 includes a light-blocking element 51 and a plurality of light-filtering elements 52. The light-filtering elements 52 are arranged in the light-blocking element 51 one by one. The light-filtering elements 52 are arranged one by one corresponding to the light-emitting pixel units. The orthographic projection of each light-emitting pixel unit on the substrate 10 (A region in the middle) Figure 1 is located inside the orthographic projection of each light-filtering element 52 on the substrate 10 (B region in the middle) Figure 1 . The light-filtering elements 52 are arranged one by one corresponding to the light-emitting pixel units so that the light-filtering elements 52 transmit light of the corresponding color emitted by the light-emitting pixel units.

[0039] Specifically, in an embodiment of the present application, the light-filtering elements 52 are color filters. The color of the color filters 52 is consistent with the color of the corresponding light-emitting pixel units, that is, the light-filtering elements 52 and the light-emitting pixel units of the same color are arranged one by one.

[0040] In an embodiment of the present application, as shown, Figure 2 the touch metal layer 41 includes a first touch metal layer 411 close to the light-emitting layer 20, a second touch metal layer 412 close to the color resist layer 50, and a second insulating layer 413 between the first touch metal layer 411 and the second touch metal layer 412. The orthographic projection of the first touch metal layer 411 on the substrate 10 overlaps the orthographic projection of the light-blocking element 51 on the substrate 10; the orthographic projection of the second touch metal layer 412 on the substrate 10 overlaps the orthographic projection of the light-blocking element 51 on the substrate 10. The orthographic projection of the first touch metal layer 411 on the substrate 10 overlaps the orthographic projection of the light-blocking element 51 on the substrate 10, so as to avoid the first touch metal layer 411 from blocking the emitted light when the thickness of the first insulating layer 42 is reduced and the light-emitting layer 20 emits light at a larger angle; the orthographic projection of the second touch metal layer 412 on the substrate 10 overlaps the orthographic projection of the light-blocking element 51 on the substrate 10, so as to avoid the second touch metal layer 412 from blocking the emitted light when the thickness of the first insulating layer 42 is reduced and the light-emitting layer 20 emits light at a larger angle.

[0041] Preferably, in the embodiment, the second insulating layer 413 is an inorganic insulating layer, the material of the second insulating layer 413 is silicon oxide or silicon nitride or silicon oxynitride, the refractive index of the second insulating layer 413 is greater than 1.45 and less than 2.55, and the thickness of the second insulating layer 413 is less than 3 microns. The second insulating layer 413 is arranged between the first touch metal layer 411 and the second touch metal layer 412. The second insulating layer 413 is arranged as an inorganic layer, and the content of hydrogen and oxygen elements in the inorganic layer is low, so that the corrosion of the organic material to the metal material components in the first touch metal layer 411 and the second touch metal layer 412 can be avoided.

[0042] Further, in an embodiment of the present application, as shown in FIG. 4, the touch display device further comprises a third insulating layer 60 arranged between the encapsulation layer 30 and the touch layer 40. The third insulating layer 60 can protect the encapsulation layer 30 during the process of preparing the touch layer 40. Figure 3

[0043] Specifically, the material of the third insulating layer 60 is silicon oxide or silicon nitride or silicon oxynitride, the refractive index of the third insulating layer 60 is greater than 1.45 and less than 2.55, and the thickness of the third insulating layer 60 is less than 3 microns. Since the melting point of the inorganic material such as silicon oxide or silicon nitride or silicon oxynitride is high, the encapsulation layer 30 can be better protected during the preparation process of the touch layer 40. In addition, the content of hydrogen and oxygen elements in the inorganic material is low, so that the corrosion of the metal material structure in the touch layer 40 can be avoided.

[0044] As shown in FIG. 4, the third insulating layer 60 is arranged between the encapsulation layer 30 and the touch layer 40. Figure 4 ​As shown, in one embodiment of the present application, the first insulating layer 42 comprises a first region 421 and a second region 422 which are arranged in a spaced manner, and the first region 421 overlaps the red light-emitting pixel unit 211 in the direction perpendicular to the substrate 10, and the second region 422 overlaps the green pixel unit 212. That is, the orthographic projection of the first region 421 on the substrate 10 overlaps the orthographic projection of the red light-emitting pixel unit 211 on the substrate 10, and the orthographic projection of the second region 422 on the substrate 10 overlaps the orthographic projection of the green pixel unit 212 on the substrate 10. The thickness of the first region 421 is greater than the thickness of the second region 422. Since the decay rate of red light is lower than that of green light at the same light-emitting angle, the thickness of the first region 421 is set to be greater than the thickness of the second region 422, so that the green light has a greater light-emitting angle, the decay rate of the green light is reduced, and the decay rates of different color lights tend to be the same. It can be understood that the thickness of the first region 421 being greater than the thickness of the second region 422 is only a specific example in this embodiment, and does not constitute a limitation. In other embodiments of the present application, the thickness of the first region 421 can be equal to the thickness of the second region 422, and other structures such as preparation of other film layers can be flexibly set according to actual needs.

[0045] In addition, in this embodiment, the first insulating layer 42 further comprises a third region 423 which is arranged in a spaced manner with the first region 421 and the second region 422, and the third region 423 overlaps the blue pixel unit 213 in the direction perpendicular to the substrate 10, that is, the orthographic projection of the third region 423 on the substrate 10 overlaps the orthographic projection of the blue pixel unit 213 on the substrate 10. In addition, the thickness of the second region 422 is greater than the thickness of the third region 423. Since the decay rate of green light is lower than that of blue light at the same light-emitting angle, the thickness of the second region 422 is set to be greater than the thickness of the third region 423, so that the blue light has a greater light-emitting angle, the decay rate of the blue light is reduced, and the decay rates of different color lights tend to be the same. It can be understood that the thickness of the second region 422 being greater than the thickness of the third region 423 is only an example in this embodiment, and does not constitute a limitation. In other embodiments of the present application, the thickness of the second region 422 can be equal to the thickness of the third region 423, and other structures such as preparation of other film layers can be flexibly set according to actual needs.

[0046] Next, the brightness decay rate of the display panel provided by the above-mentioned embodiment under a large viewing angle is illustrated. Taking 45° as an example, the following table shows the brightness decay rate.

[0047]

[0048]

[0049] According to the above table, the first insulating layer 42 is replaced from 3 microns of conventional organic material to 0.3 microns of inorganic material, which can improve the viewing angle luminance attenuation, and the red / green / blue luminance attenuation improvement percentage values are 3.48% / 2.95% / 0.67%, respectively.

[0050] Another embodiment of the present application relates to a display device, the display device comprising: a power supply component and a display panel, the power supply component being configured to supply power to the display panel. The display panel can comprise any of the display panels described above.

[0051] It can be found that the present embodiment can be implemented in cooperation with the foregoing embodiments. The technical details mentioned in the foregoing embodiments are still valid in the present embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the technical details mentioned in the present embodiment can also be applied to the foregoing embodiments.

[0052] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A display panel, characterized in that, include: A substrate, a light-emitting layer located on one side of the substrate, an encapsulation layer located on the side of the light-emitting layer away from the substrate, a touch layer located on the side of the encapsulation layer away from the light-emitting layer, and a color resist layer located on the side of the touch layer away from the encapsulation layer; The touch layer includes a touch metal layer located on the side of the encapsulation layer away from the substrate and a first insulating layer located between the touch metal layer and the color resist layer, wherein the first insulating layer is an inorganic insulating layer; The thickness of the first insulating layer is less than 3 micrometers.

2. The display panel according to claim 1, characterized in that, The thickness of the first insulating layer is greater than 0.1 micrometers and less than 0.5 micrometers.

3. The display panel according to claim 1, characterized in that, The first insulating layer is made of silicon oxide, silicon nitride, or silicon oxynitride. The refractive index of the first insulating layer is greater than 1.45 and less than 2.

55.

4. The display panel according to claim 1, characterized in that, The light-emitting layer includes a plurality of light-emitting pixel units, and the plurality of light-emitting pixel units includes a plurality of red pixel units and a plurality of green pixel units; The first insulating layer includes a first region and a second region spaced apart; Along a direction perpendicular to the substrate, the first region overlaps with the red pixel unit, and the second region overlaps with the green pixel unit; the thickness of the first region is greater than the thickness of the second region.

5. The display panel according to claim 4, characterized in that, The plurality of light-emitting pixel units further includes a plurality of blue pixel units, and the first insulating layer includes a third region that overlaps with the blue pixel units in a direction perpendicular to the substrate, wherein the thickness of the second region is greater than the thickness of the third region.

6. The display panel according to claim 1, characterized in that, The light-emitting layer includes multiple light-emitting pixel units; The color resist layer includes a light-shielding element and a plurality of light-filtering elements. The light-shielding element includes a plurality of perforations, and the light-filtering elements are disposed in the perforations one by one. The filter element is configured in a one-to-one correspondence with the light-emitting pixel unit.

7. The display panel according to claim 6, characterized in that, The touch metal layer includes a first touch metal layer near the light-emitting layer, a second touch metal layer near the color resist layer, and a second insulating layer located between the first touch metal layer and the second touch metal layer; The orthographic projection of the first touch metal layer on the substrate overlaps with the orthographic projection of the light-shielding element on the substrate; The orthographic projection of the second touch metal layer on the substrate overlaps with the orthographic projection of the light-shielding element on the substrate.

8. The display panel according to claim 7, characterized in that, The second insulating layer is an inorganic insulating layer, and the material of the second insulating layer is silicon oxide, silicon nitride, or silicon oxynitride; The refractive index of the second insulating layer is greater than 1.45 and less than 2.55; The thickness of the second insulating layer is less than 3 micrometers.

9. The display panel according to claim 8, characterized in that, It also includes a third insulating layer located between the encapsulation layer and the touch layer. The material of the third insulating layer is silicon oxide, silicon nitride, or silicon oxynitride. The refractive index of the third insulating layer is greater than 1.45 and less than 2.55; The thickness of the third insulating layer is less than 3 micrometers.

10. A display device, characterized in that, include: A power supply component, and a display panel according to any one of claims 1 to 9, wherein the power supply component is used to supply power to the display panel.

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