Display device

Abstract

The display device comprises a display panel and a supporting layer, the display panel comprises a substrate and a light-emitting layer located on one side of the substrate, and the light-emitting layer comprises a plurality of light-emitting units; the supporting layer is located on the side, away from the light-emitting layer, of the substrate and comprises a base and a functional layer which are stacked, and the refractive index of the functional layer is larger than that of the base. The functional layer with the refractive index larger than that of the substrate is arranged on at least one side of the substrate, reflection of ambient light on the backlight side of the display panel is improved, then the display contrast ratio of the light emitting side of the display device is improved, and the display effect of the display device is improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the invention

[0004] An embodiment of the present application provides a display device, aiming to improve the performance of the display device.

[0005] An embodiment of the first aspect of the present application provides a display device, including a display panel and a supporting layer, the display panel including a substrate and a light-emitting layer located on one side of the substrate, the light-emitting layer including a plurality of light-emitting units; the supporting layer is located on a side of the substrate away from the light-emitting layer, the supporting layer including a stacked base and a functional layer, the refractive index of the functional layer being greater than the refractive index of the base.

[0006] According to the implementation scheme of the first aspect of the present application, the functional layer is located between the substrate and the base and / or the functional layer is located on the side of the substrate facing away from the base; optionally, the functional layer is provided on both the side of the substrate facing the base and the side of the substrate facing away from the base; optionally, the thickness of the functional layer is 30-50 μm.

[0007] According to an implementation scheme of the first aspect of the present application, the supporting layer further includes a shading layer, which is located between the functional layer and the display panel or on the side of the functional layer facing away from the display panel, and the shading layer includes a plurality of shading portions arranged at intervals, and the orthographic projection of the shading portion on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate; optionally, the material of the shading portion includes black ink.

[0008] According to the implementation scheme of the first aspect of the present application, a groove is provided on the side of the functional layer facing the substrate or the side away from the substrate, and at least part of the shading portion is located in the groove; optionally, the groove and the shading portion are arranged in a one-to-one correspondence; optionally, the shading portion is completely accommodated in the groove.

[0009] According to an implementation of the first aspect of the present application, the orthographic projection of the light-emitting unit on the substrate is located within the orthographic projection of the light-shielding portion on the substrate.

[0010] According to an implementation scheme of the first aspect of the present application, the display panel further includes: a pixel definition layer, which is located on the same side of the substrate as the light-emitting layer, the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, at least part of the light-emitting unit is accommodated in the pixel opening, and the orthographic projection of the shading portion on the substrate at least partially overlaps with the orthographic projection of the pixel opening on the substrate; optionally, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the shading portion on the substrate.

[0011] According to an implementation of the first aspect of the present application, the support layer further includes: a protective layer, and the protective layer is located on a side of the functional layer facing away from the substrate.

[0012] According to the implementation of the first aspect of the present application, the display panel further includes: an encapsulation layer located on the side of the light-emitting layer away from the substrate; a cover plate located on the side of the encapsulation layer away from the substrate, and at least part of the encapsulation layer abuts against the cover plate.

[0013] According to an implementation of the first aspect of the present application, the refractive index of the functional layer is 1.6-1.8; optionally, the reflectivity of the functional layer is greater than or equal to 15%.

[0014] According to an embodiment of the first aspect of the present application, the material of the functional layer includes at least one of optical adhesive, metal oxide or metal.

[0015] In the display device provided in the embodiment of the present application, the display device includes a display panel and a supporting layer, the display panel includes a substrate and a light-emitting layer located on one side of the substrate, the light-emitting layer includes a plurality of light-emitting units; the supporting layer is located on the side of the substrate away from the light-emitting layer, the supporting layer includes a stacked substrate and a functional layer, and the refractive index of the functional layer is greater than the refractive index of the substrate. The present application improves the reflection of ambient light on the backlight side of the display panel by arranging a functional layer with a refractive index greater than that of the substrate on at least one side of the substrate, thereby improving the display contrast of the light-emitting side of the display device and improving the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0017] Figure 1 is a cross-sectional view of a display device provided by an embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of another exemplary display device;

[0019] Figure 3 is a cross-sectional view of a display device according to another example;

[0020] Figure 4is a cross-sectional view of a display device according to another example;

[0021] Figure 5 is a cross-sectional view of a display device according to another example;

[0022] Figure 6 is a cross-sectional view of another exemplary display device.

[0023] Description of reference numerals:

[0024] 10. Display device;

[0025] 100, display panel; 110, substrate; 120, light-emitting layer; 121, light-emitting unit; 130, pixel definition layer; 131, pixel defining portion; 132, pixel opening; 140, encapsulation layer; 150, cover plate;

[0026] 200, support layer; 210, substrate; 220, functional layer; 221, groove; 230, light shielding layer; 231, light shielding portion; 240, protective layer;

[0027] z, thickness direction. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0029] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In order to better understand this application, Figures 1 to 6 The display device of the embodiment of the present application is described in detail, wherein the z direction is the thickness direction of the display device.

[0032] Please refer to Figure 1 , Figure 1 It is a cross-sectional view of a display device provided in an embodiment of the present application.

[0033] like Figure 1 As shown, an embodiment of the first aspect of the present application provides a display device 10, including a display panel 100 and a support layer 200. The display panel 100 includes a substrate 110 and a light-emitting layer 120 located on one side of the substrate 110. The light-emitting layer 120 includes a plurality of light-emitting units 121. The support layer 200 is located on a side of the substrate 110 away from the light-emitting layer 120. The support layer 200 includes a base 210 and a functional layer 220 that are stacked. The refractive index of the functional layer 220 is greater than the refractive index of the base 210.

[0034] Optionally, the display device 10 is a transparent display device integrated in a car, such as a HUD (Head-Up Display) system integrated in the front windshield of the car, an in-vehicle entertainment system, etc. Among them, the substrate 210 in the display device 10 is a vehicle-mounted glass in the car, such as a windshield or a sunroof glass, etc. The display panel 100 is located on the side of the substrate 210 facing the cockpit, and the side of the display panel 100 facing the driver and passengers in the car is its light-emitting side, that is, the side of the display panel 100 facing away from the substrate 210 is the light-emitting side, and the side of the display panel 100 facing the substrate 210 is the backlight side. However, in order not to affect the transparency of the vehicle-mounted glass, the substrate 210 is transparent glass, the display panel 100 is a transparent display panel, and the display panel 100 can emit light on both sides in the thickness direction.

[0035] Optionally, the display panel 100 can be prepared independently and then integrated on the support layer 200 , which is beneficial to improve the existing vehicle glass. The display panel 100 can also be directly prepared on the support layer 200 .

[0036] Optionally, there are multiple ways to set the substrate 110. The substrate 110 may include a substrate and a first conductive layer, a second conductive layer, and a third conductive layer that are arranged on one side of the substrate and are stacked. An insulating layer is provided between adjacent conductive layers. Optionally, a drive device layer is provided on the substrate, and a pixel drive circuit is provided in the drive device layer. The pixel drive circuit includes a transistor and a storage capacitor. The transistor includes a semiconductor, a gate, a source and a drain. The storage capacitor includes a first plate and a second plate. As an example, the gate and the first plate can be located in the first conductive layer, the second plate can be located in the second conductive layer, and the source and drain can be located in the third conductive layer.

[0037] The display device 10 provided in the present application, by disposing a functional layer 220 with a refractive index greater than that of the substrate 210 on at least one side of the substrate 210, does not affect the transparency of the vehicle glass, but also improves the reflection of ambient light on the backlight side of the display panel 100, thereby improving the display contrast of the light-emitting side of the display device 10 and improving the display effect of the display device 10.

[0038] Please refer to Figures 1 to 3 , Figure 2 is a cross-sectional view of another exemplary display device; Figure 3 is a cross-sectional view of a display device according to yet another example.

[0039] In some optional embodiments, the functional layer 220 is located between the substrate 210 and the substrate 110 and / or the functional layer 220 is located on a side of the substrate 210 facing away from the substrate 110 .

[0040] Optionally, the functional layer 220 is located on a side of the base 210 facing away from the substrate 110 (eg Figure 1 shown).

[0041] Optionally, the functional layer 220 is located between the base 210 and the substrate 110 (eg Figure 2 shown).

[0042] Optionally, the substrate 210 is provided with a functional layer 220 (eg, Figure 3 shown).

[0043] In some optional embodiments, the refractive index of the functional layer 220 is 1.6-1.8.

[0044] Optionally, the reflectivity of the functional layer 220 is greater than or equal to 15%. The reflectivity refers to the percentage of the radiation energy reflected by an object to the total radiation energy. Generally, a material with a large refractive index also has a large reflectivity.

[0045] Optionally, the refractive index of the substrate 210 is 1.47-1.78, and the reflectivity of the substrate 210 is 4%.

[0046] Optionally, the material of the functional layer 220 includes at least one of a high refractive index optical glue, a metal oxide or a metal, such as titanium oxide, zirconium oxide, aluminum or silver.

[0047] Optionally, the thickness of the functional layer 220 is 30-50 μm.

[0048] In some optional embodiments, the support layer 200 further includes a light shielding layer 230, which is located between the functional layer 220 and the display panel 100 or on the side of the functional layer 220 away from the display panel 100. The light shielding layer 230 includes a plurality of light shielding portions 231 disposed at intervals, and the orthographic projection of the light shielding portion 231 on the substrate 110 at least partially overlaps with the orthographic projection of the light emitting unit 121 on the substrate 110.

[0049] Optionally, the material of the light shielding portion 231 includes black ink.

[0050] The display device 10 provided in the present application is provided with a light shielding layer 230 on the backlight side of the display panel 100, and the light shielding portion 231 in the light shielding layer 230 at least partially overlaps with the light emitting unit 121, and the light shielding portion 231 can absorb light and reduce the light output of the display panel 100 on the backlight side, so that the display content of the display device 10 is not visible on the side away from the substrate 210, thereby protecting the user's privacy. By arranging multiple light shielding portions 231 at intervals, the light shielding layer 230 does not cover the entire surface of the display panel 100, which reduces the light output of the display panel 100 on the backlight side while reducing the impact on the transparency of the vehicle-mounted glass.

[0051] Please refer to Figure 1 and Figure 4 , Figure 4 is a cross-sectional view of another exemplary display device.

[0052] like Figure 1 and Figure 4 As shown, in some optional embodiments, a groove 221 is provided on a side of the functional layer 220 facing the substrate 210 or on a side away from the substrate 210 , and at least a portion of the light shielding portion 231 is located in the groove 221 .

[0053] Optionally, the grooves 221 and the light shielding portions 231 are arranged in a one-to-one correspondence.

[0054] Optionally, in the thickness direction z, the thickness of the light shielding portion 231 is less than the maximum thickness of the functional layer 220 .

[0055] Optionally, the light shielding portion 231 is completely contained in the groove 221. When the groove 221 is located on the side of the functional layer 220 facing the substrate 210, the surface of the light shielding portion 231 facing the substrate 210 is flush with the surface of the functional layer 220 facing the substrate 210. When the groove 221 is located on the side of the functional layer 220 facing away from the substrate 210, the surface of the light shielding portion 231 facing away from the substrate 210 is flush with the surface of the functional layer 220 facing away from the substrate 210.

[0056] The display device 10 provided in the present application reduces the thickness of the support layer 200 by providing a groove 221 for accommodating the light shielding portion 231 on the functional layer 220 , thereby reducing the overall thickness of the display device 10 .

[0057] In some optional embodiments, the orthographic projection of the light emitting unit 121 on the substrate 110 is located within the orthographic projection of the light shielding portion 231 on the substrate 110 .

[0058] The display device 10 provided in the present application further reduces the light output of the display panel 100 on the backlight side by making the orthographic projection of the light-emitting unit 121 on the substrate 110 be located within the orthographic projection of the light-shielding portion 231 on the substrate 110, so that the display content of the display device 10 is not visible on the side away from the substrate 210, thereby protecting the user's privacy.

[0059] In some optional embodiments, the display panel 100 also includes a pixel definition layer 130, the pixel definition layer 130 includes a pixel defining portion 131 and a pixel opening 132 formed by the pixel defining portion 131, at least a portion of the light-emitting unit 121 is accommodated in the pixel opening 132, and the orthographic projection of the light-shielding portion 231 on the substrate 110 at least partially overlaps with the orthographic projection of the pixel opening 132 on the substrate 110.

[0060] Optionally, the orthographic projection of the pixel opening 132 on the substrate 110 is located within the orthographic projection of the light shielding portion 231 on the substrate 110 .

[0061] Please refer to Figure 5 , Figure 5 is a cross-sectional view of another exemplary display device.

[0062] like Figure 5 As shown, in some optional embodiments, the display panel 100 further includes an encapsulation layer 140 and a cover plate 150. The encapsulation layer 140 is located on the side of the light-emitting layer 120 away from the substrate 110. The cover plate 150 is located on the side of the encapsulation layer 140 away from the substrate 110, and at least part of the encapsulation layer 140 abuts against the cover plate 150.

[0063] Optionally, the material of the encapsulation layer 140 may include an inorganic material, that is, the encapsulation layer 140 is an inorganic encapsulation layer. The inorganic encapsulation layer may be prepared by chemical vapor deposition, which can improve the compactness of the encapsulation layer 140 and thus improve the encapsulation effect.

[0064] Optionally, the material of the encapsulation layer 140 includes an organic material, that is, the encapsulation layer 140 is an organic encapsulation layer. The organic encapsulation layer can be prepared by inkjet printing, so that the encapsulation layer has a suitable thickness.

[0065] Optionally, the encapsulation layer 140 may include a plurality of sub-layers, wherein at least one sub-layer is an inorganic encapsulation layer, and at least one sub-layer is an organic encapsulation layer. The stacking of the organic encapsulation layer and the inorganic encapsulation layer can further improve the encapsulation effect.

[0066] Optionally, the cover plate 150 includes a flexible cover plate and a hard cover plate, the hard cover plate has a thickness of 500 μm, and the flexible cover plate has a thickness of 28-55 μm. The flexible cover plate includes a substrate and a surface treatment layer, for example, when the thickness of the flexible cover plate is 28 μm, the thickness of the substrate is 25 μm, and the thickness of the surface treatment layer is 3 μm; when the thickness of the flexible cover plate is 55 μm, the thickness of the substrate is 50 μm, and the thickness of the surface treatment layer is 5 μm.

[0067] The display device 10 provided by the present application eliminates the polarizer so that the encapsulation layer 140 is directly in contact with the cover plate 150. The transmittance of the polarizer is generally only 42-45%. Eliminating the polarizer can greatly improve the light extraction efficiency of the display device 10, thereby improving the display brightness and display effect of the display device 10. Since the display device 10 is a transparent display device integrated in a car, the interior of the car is generally a dark environment during use, and even if the polarizer is eliminated, the light extraction side of the display device 10 is not prone to reflections that affect the display effect.

[0068] Please refer to Figure 6 , Figure 6 is a cross-sectional view of another exemplary display device.

[0069] like Figure 6 As shown, in some optional embodiments, the support layer 200 further includes a protective layer 240 , which is located on a side of the functional layer 220 facing away from the substrate 110 , and at least a portion of the protective layer 240 abuts against the functional layer 220 .

[0070] Optionally, the material of the protective layer 240 includes metal, metal oxide and graphite. The protective layer 240 is used to isolate the water and oxygen protection functional layer 220. When the protective layer 240 is made of metal material, the protective layer 240 can also play the role of shielding and heat insulation.

[0071] Optionally, the functional layer 220 is located between the base 210 and the substrate 110. The functional layer 220, the light shielding layer 230, and the protective layer 240 can be first prepared on the display panel 100 and then installed as a whole on the base 210, which is convenient for improving existing vehicle glass.

[0072] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display device, characterized in that: include: The display panel comprises a substrate and a light-emitting layer located on one side of the substrate, wherein the light-emitting layer comprises a plurality of light-emitting units; The support layer is located on a side of the substrate away from the light-emitting layer. The support layer includes a base and a functional layer which are stacked. The refractive index of the functional layer is greater than the refractive index of the base.

2. The display device according to claim 1, characterized in that The functional layer is located between the substrate and the base plate and / or the functional layer is located on a side of the substrate facing away from the base plate; Preferably, the functional layer is provided on both the side of the base facing the substrate and the side facing away from the substrate; Preferably, the thickness of the functional layer is 30-50 μm.

3. The display device according to claim 2, characterized in that The support layer further includes a light shielding layer, the light shielding layer is located between the functional layer and the display panel or on a side of the functional layer away from the display panel, the light shielding layer includes a plurality of light shielding portions arranged at intervals, and the orthographic projection of the light shielding portion on the substrate at least partially overlaps with the orthographic projection of the light emitting unit on the substrate; Preferably, the material of the light-shielding portion includes black ink.

4. The display device according to claim 3, characterized in that: A groove is provided on a side of the functional layer facing the substrate or on a side away from the substrate, and at least a part of the light shielding portion is located in the groove; Preferably, the grooves are arranged in one-to-one correspondence with the light shielding parts; Preferably, the shading portion is completely accommodated in the groove.

5. The display device according to claim 3, characterized in that: The orthographic projection of the light emitting unit on the substrate is located within the orthographic projection of the light shielding portion on the substrate.

6. The display device according to claim 3, characterized in that: The display panel further includes: a pixel definition layer, located on the same side of the substrate as the light-emitting layer, the pixel definition layer comprising a pixel definition portion and a pixel opening formed by the pixel definition portion, at least part of the light-emitting unit is accommodated in the pixel opening, and the orthographic projection of the light-shielding portion on the substrate at least partially overlaps with the orthographic projection of the pixel opening on the substrate; Preferably, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the light shielding portion on the substrate.

7. The display device according to claim 1, characterized in that The support layer also includes: A protection layer is located on a side of the functional layer facing away from the substrate.

8. The display device according to claim 1, characterized in that: The display panel further includes: An encapsulation layer, located on a side of the light-emitting layer away from the substrate; The cover plate is located on a side of the packaging layer away from the substrate, and at least a portion of the packaging layer is in contact with the cover plate.

9. The display device according to claim 1, characterized in that: The refractive index of the functional layer is 1.6-1.8; Preferably, the reflectivity of the functional layer is greater than or equal to 15%.

10. The display device according to claim 1, characterized in that The material of the functional layer includes at least one of optical adhesive, metal oxide or metal.

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