CN221449022U - Light-transmitting display panel and display device - Google Patents

Abstract

The embodiment of the application provides a light-transmitting display panel and a display device, wherein the light-transmitting display panel comprises: the light-emitting device comprises a substrate, a first composite film layer and a light-emitting layer; the first composite film layer is arranged on one side of the substrate; the light-emitting layer is arranged on one side of the substrate, which is away from the first composite film layer; the difference between the refractive index of the first composite film layer and the refractive index of the substrate is within a first set threshold value. In the light-transmitting display panel provided by the embodiment of the application, the refractive index of the first composite film layer is greater than or equal to 1, and the difference between the refractive indexes of the first composite film layer and the substrate is within the first threshold value. The first threshold value is smaller than or equal to the difference value of the refractive index of the substrate material and the refractive index of air, and the first composite film layer is arranged between the substrate and the air, so that the gradient of the change of the refractive index between the air and the substrate is reduced, the effect of reducing interface reflection is achieved, the light transmittance of the light-transmitting display panel can be improved, the anti-reflection effect is achieved, and the technological performance of the light-transmitting display panel is further improved.

Description

Light-transmitting display panel and display device

Technical Field

The present application relates to the field of display panels, and in particular, to a light-transmitting display panel and a display device.

Background

Organic light emitting diodes (LIGHT EMITTING DISPLAY, OLED) and flat display devices based on light emitting Diode (LIGHT EMITTING) technology have been widely used in various consumer electronic products such as mobile phones, televisions, notebook computers, and desktop computers, as they have advantages of high image quality, power saving, thin body, and wide application range.

However, the technological properties of the current OLED display products are to be improved.

Disclosure of utility model

The embodiment of the application provides a light-transmitting display panel and a display device, aiming at improving the process performance of the light-transmitting display panel.

An embodiment of a first aspect of the present application provides a light-transmitting display panel, including: the light-emitting device comprises a substrate, a first composite film layer and a light-emitting layer; the first composite film layer is arranged on one side of the substrate; the light-emitting layer is arranged on one side of the substrate, which is away from the first composite film layer; the difference between the refractive index of the first composite film layer and the refractive index of the substrate is within a first set threshold value.

In some embodiments of the present application, the first composite film layer includes a plurality of first sub-layers stacked in a direction away from the substrate, the refractive index of the plurality of first sub-layers gradually decreasing in the direction away from the substrate.

In some embodiments of the application, the refractive index of the first composite film layer is greater than or equal to 1 and less than or equal to the refractive index of the substrate.

In some embodiments of the application, the first sub-layer comprises a first top layer on its own side facing the substrate, the first top layer having a refractive index of less than or equal to 1.6.

In some embodiments of the application, the first sub-layer includes a first underlayer on a side facing away from the substrate, the first underlayer having a refractive index greater than or equal to 1.0.

In some embodiments of the application, a second composite film layer is disposed on a side of the light emitting layer facing away from the substrate, the second composite film layer having a refractive index greater than 1 and less than the refractive index of the light emitting layer.

In some embodiments of the present application, the light-transmitting display panel further includes a cover plate disposed on a side of the second composite film layer adjacent to the light-emitting layer, wherein the refractive index of the second composite film layer is greater than 1 and less than that of the cover plate

In some embodiments of the present application, the second composite film layer includes a plurality of second sub-layers stacked in a direction away from the cover plate, and refractive indexes of the plurality of second sub-layers gradually decrease in the direction away from the cover plate.

In some embodiments of the application, the second composite film layer includes a second underlayer on its side facing the cover plate, the second underlayer having a refractive index of less than 1.6.

In some embodiments of the application, the second sub-layer comprises a second top layer facing away from the cover plate side, the second top layer having a refractive index greater than 1.

In some embodiments of the application, an adhesive layer is disposed between the light emitting layer and the cover plate, and a third composite film layer is disposed between the adhesive layer and the cover plate.

In some embodiments of the present application, the refractive index of the third composite film layer gradually decreases from one of the adhesive layer and the cover plate, which has a larger refractive index, toward the other, the refractive index of the third composite film layer is smaller than or equal to one of the adhesive layer and the cover plate, which has a larger refractive index, and the refractive index of the third composite film layer is greater than or equal to the other.

In some embodiments of the present application, the third composite film layer includes a plurality of third sub-layers stacked in a direction away from the cover plate, and refractive indexes of the plurality of third sub-layers gradually decrease from one of the adhesive layer and the cover plate, which has a larger refractive index, toward the other.

In some embodiments of the present application, a light-transmitting display panel includes a light-transmitting region, and a light-emitting layer includes a plurality of sub-pixels, where the sub-pixels and the light-transmitting region are disposed in a staggered manner; a filter layer is arranged between the light-emitting layer and the cover plate, the filter layer comprises a filter unit, and the orthographic projection of the filter unit on the light-emitting layer covers a plurality of sub-pixels.

An embodiment of a second aspect of the present application provides a display device, including a light-transmitting display panel in any one of the embodiments of the first aspect.

In an embodiment of the present application, the refractive index of the first composite film layer is greater than or equal to 1, and the difference between the refractive indices of the first composite film layer and the substrate is within a first threshold. The first threshold value is smaller than or equal to the difference value of the refractive index of the substrate and the refractive index of air, and the first composite film layer is arranged between the substrate and the air, so that the gradient of the change of the refractive index between the air and the substrate is reduced, the interface reflection is reduced, the light transmittance of the light-transmitting display panel can be improved, the anti-reflection effect is achieved, and the technological performance of the light-transmitting display panel is further improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings in which like or similar reference characters designate the same or similar features.

Fig. 1 is a schematic structural diagram of a light-transmitting display panel according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another transparent display panel according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a light-transmitting display panel according to another embodiment of the present application;

Fig. 4 is a schematic structural diagram of another light-transmitting display panel according to an embodiment of the application.

Reference numerals illustrate: 100. a substrate; 200. a first composite film layer; 210. a first sub-layer; 211. a first top layer; 212. a first bottom layer; 213. a first middle layer; 300. a light emitting layer; 310. a sub-pixel; 311. a first subpixel; 312. a second subpixel; 313. a third sub-pixel; 320. an encapsulation layer; 400. a cover plate; 500. a second composite film layer; 510. a second sub-layer; 511. a second bottom layer; 512. a second top layer; 513. a second middle layer; 600. an adhesive layer; 700. a third composite film layer; 710. a third sub-layer; 800. a filter layer; 900. and a light transmission area.

Detailed Description

Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the embodiment of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

For a better understanding of the present application, a light transmissive display panel according to an embodiment of the present application is described in detail below with reference to fig. 1 to 2.

As shown in fig. 1 and 2, an embodiment of a first aspect of the present application provides a light-transmitting display panel, including: a substrate 100, a first composite film layer 200, and a light emitting layer 300; the first composite film layer 200 is arranged on one side of the substrate 100, and the light-emitting layer 300 is arranged on one side of the substrate 100 away from the first composite film layer 200; wherein, the difference between the refractive index of the first composite film layer 200 and the refractive index of the substrate 100 is within a first set threshold.

In some embodiments of the present application, the first composite film layer 200 is disposed on one side of the substrate 100, the light emitting layer 300 is disposed on one side of the substrate 100 facing away from the first composite film layer 200, one side of the first composite film layer 200 is attached to the substrate 100, the other side is air, the refractive index of the air is about 1, the refractive index of the first composite film layer 200 is greater than or equal to 1, and the difference between the refractive indices of the first composite film layer 200 and the substrate 100 is within a first threshold. The first threshold value is smaller than or equal to the difference value between the refractive index of the substrate 100 and the refractive index of air, and the first composite film layer 200 is arranged between the substrate 100 and the air, so that the gradient of the change of the refractive index between the air and the substrate 100 is reduced, the interface reflection is reduced, the light transmittance of the light-transmitting display panel can be improved, the anti-reflection effect is achieved, and the technological performance of the light-transmitting display panel is further improved.

Light enters the first composite film layer 200 from the substrate 100, then enters air from the first composite film layer 200, the difference value of the refractive indexes of the first composite film layer 200 and the substrate 100 is positioned in a first threshold value, the first threshold value is smaller than or equal to the difference value of the refractive indexes between the substrate and the air, and the first composite film layer 200 reduces the gradient of the change of the refractive indexes between the air and the substrate 100 so as to reduce the interface reflectivity, improve the light transmittance and achieve the anti-reflection effect.

As shown in fig. 1, in some alternative embodiments, the first composite film layer 200 includes a plurality of first sub-layers 210 stacked in a direction away from the substrate 100, and the refractive index of the plurality of first sub-layers 210 gradually decreases in the direction away from the substrate 100.

In these alternative embodiments, the plurality of first sub-layers 210 are stacked in order in the direction away from the substrate 100, and the refractive index of the plurality of first sub-layers 210 gradually decreases in the direction away from the substrate 100, that is, the refractive index of the first sub-layer 210 closest to the substrate 100 is the largest and equal to or smaller than the refractive index of the substrate 100, and the refractive index of each layer decreases in the direction away from the substrate 100, and the refractive index of the first sub-layer 210 closest to the substrate 100 is the smallest and equal to or larger than the refractive index of air. The provision of the plurality of first sub-layers 210 reduces the gradient of the change in refractive index of air from the refractive index of the substrate 100.

For convenience of description, taking an example that light firstly enters the plurality of first sublayers 210 from air and then enters the substrate 100, the light firstly enters a layer with the smallest refractive index in the first sublayers 210, that is, the light firstly enters a layer with the refractive index closest to air in the first sublayers 210 from air, and the light sequentially passes through the plurality of first sublayers 210 with gradually increased refractive indexes in the first composite film layer 200, and finally enters the substrate 100 through a layer with the largest refractive index in the plurality of first sublayers 210, the plurality of first sublayers 210 reduce the gradient of the change of the refractive index between the air and the substrate 100, thereby reducing interface reflection, improving the light transmittance of the light-transmitting display panel, and further improving the process performance of the light-transmitting display panel.

As shown in fig. 1 and 2, in some alternative embodiments, the refractive index of the first composite film layer 200 is greater than or equal to 1 and less than or equal to the refractive index of the substrate 100.

In these alternative embodiments, one side of the first composite film layer 200 is attached to the substrate 100, and the other side is air, where the refractive index of air is about 1, and the refractive index of the first composite film layer 200 is greater than or equal to 1 and less than or equal to the refractive index of the substrate 100, and the refractive index of the first composite film layer 200 is located between the air and the substrate 100, so as to help reduce the gradient of the refractive index variation between the air and the substrate 100, and thus reduce the reflection of light.

In some alternative embodiments, as shown in fig. 1, the first sub-layer 210 includes a first top layer 211 on its own side facing the substrate 100, the first top layer 211 having a refractive index less than or equal to 1.6.

In these alternative embodiments, the first top layer 211 is the layer of the first sub-layer 210 closest to the substrate 100, and the refractive index of the first top layer 211 is less than or equal to 1.6, and specifically the refractive index of the first top layer 211 may be 1.6, 1.58, 1.55, 1.52, 1.50, etc. The material of the substrate 100 may include glass or polyimide, and the refractive index of the glass and polyimide is between 1.5 and 1.6, and the refractive index of the first top layer 211 is smaller than that of the substrate 100 made of glass and polyimide materials in the embodiment of the present application.

Optionally, as shown in fig. 1, the first sub-layer 210 includes a first bottom layer 212 on a side facing away from the substrate 100, and the refractive index of the first bottom layer 212 is greater than or equal to 1.0. The first bottom layer 212 is the layer of the first sub-layer 210 farthest from the substrate 100, that is, the layer closest to the air, and the refractive index of the first bottom layer 212 is greater than or equal to 1.0, and specifically, the refractive index of the first bottom layer 212 may be 1.0, 1.02, 1.05, 1.08, 1.1, or the like.

Optionally, as shown in fig. 1, the first sub-layer 210 further includes a first middle layer 213, where the first middle layer 213 is located between the first top layer 211 and the first bottom layer 212, and the refractive index of the first middle layer 213 is smaller than the refractive index of the first top layer 211 and larger than the refractive index of the first bottom layer 212. The first middle layer 213 is used to reduce the gradient of refractive index change between the first top layer 211 and the first bottom layer 212, which can reduce the light reflectivity.

The number of the first middle layers 213 may be one or more, and in the embodiment of the present application, the first middle layers 213 are taken as one, and in other embodiments, the number of the first middle layers 213 may be more than one, that is, a plurality of other first sub-layers 210 may be further disposed between the first top layer 211 and the first bottom layer 212.

In some alternative embodiments, as shown in fig. 2, a second composite film layer 500 is provided on a side of the light emitting layer 300 facing away from the substrate 100, the second composite film layer 500 having a refractive index greater than 1 and less than the refractive index of the light emitting layer 300.

In these alternative embodiments, the second composite film 500 is disposed on a side of the light-emitting layer 300 facing away from the substrate 100, and when light is incident on the light-emitting layer 300 from another light-transmitting medium on the side of the light-emitting layer 300 facing away from the substrate 100, the second composite film 500 is used to reduce the refractive index gradient between the other light-transmitting medium and the light-emitting layer 300, thereby reducing the reflection of light and acting as an anti-reflection function.

As shown in fig. 2, in some alternative embodiments, the light-transmitting display panel further includes a cover plate 400 disposed on a side of the second composite film 500 near the light-emitting layer 300, where the refractive index of the second composite film 500 is greater than 1 and less than the refractive index of the cover plate 400.

In these alternative embodiments, one side of the second composite film 500 is attached to the cover plate 400, the other side is air, the refractive index of air is close to 1, the refractive index of the second composite film 500 is greater than 1 and smaller than that of the cover plate 400, that is, the refractive index of the second composite film 500 is between that of the air and the cover plate 400, the second composite film 500 reduces the gradient of the refractive index between the air and the cover plate 400, light enters the second composite film 500 from the air first and then enters the cover plate 400, and the gradient of the refractive index between the second composite film 500 and the air is smaller than that between the air and the cover plate 400, so that the second composite film 500 is beneficial to reducing the interface reflectivity and improving the light transmittance.

As shown in fig. 3, in some alternative embodiments, the second composite film layer 500 includes a plurality of second sub-layers 510 stacked in a direction away from the cover plate 400, and the refractive index of the plurality of second sub-layers 510 gradually decreases in a direction away from the cover plate 400.

In these alternative embodiments, the plurality of second sub-layers 510 are stacked in order along the direction away from the cover plate 400, and the refractive index of the plurality of second sub-layers 510 gradually decreases along the direction away from the cover plate 400, that is, the refractive index of the second sub-layer 510 closest to the cover plate 400 is the largest and equal to or smaller than the refractive index of the cover plate 400, the refractive index of each layer decreases along the direction away from the cover plate 400, and the refractive index of the second sub-layer 510 closest to the cover plate 400 is the smallest and equal to or larger than the refractive index of air. The provision of the plurality of second sub-layers 510 reduces the gradient of the variation of the refractive index of air from that of the cover plate 400.

For convenience of description, taking an example that light firstly enters the plurality of second sublayers 510 from air and then enters the cover plate 400, the light firstly enters a layer with the smallest refractive index in the second sublayers 510, namely, the light firstly enters a layer with the refractive index closest to air in the plurality of second sublayers 510 from air, the light sequentially passes through the plurality of second sublayers 510 with gradually increased refractive indexes in the second composite film layer 500, finally enters the cover plate 400 through a layer with the largest refractive index in the plurality of second sublayers 510, and the plurality of second sublayers 510 reduce the gradient of the change of the refractive index between the air and the cover plate 400, thereby reducing interface reflection, improving the light transmittance and achieving the anti-reflection effect.

In some alternative embodiments, as shown in fig. 3, the second sub-layer 510 includes a second bottom layer 511 on its side facing the cover plate 400, the second bottom layer 511 having a refractive index less than 1.6.

In these alternative embodiments, the second bottom layer 511 is one of the second sub-layers 510 closest to the cover plate 400, and the refractive index of the second bottom layer 511 is less than or equal to 1.6, and specifically, the refractive index of the second bottom layer 511 may be 1.6, 1.55, 1.50, 1.45, 1.4, or the like; the material of the cover plate 400 may include glass having a refractive index of 1.5-1.6 or resin having a refractive index of 1.4-1.6, and the refractive index of the second bottom layer 511 is smaller than that of the cover plate 400 made of glass or resin material in the embodiment of the present application.

Preferably, as shown in fig. 3, the second sub-layer 510 includes a second top layer 512 facing away from the cover plate 400, and the refractive index of the second top layer 512 is greater than 1. The second top layer 512 is the layer of the second sub-layer 510 farthest from the cover plate 400, that is, the layer closest to the air, and the refractive index of the second top layer 512 is greater than 1.0, and specifically, the refractive index of the second top layer 512 may be 1.01, 1.02, 1.05, 1.08, 1.1, etc.

Optionally, as shown in fig. 3, the second sub-layer 510 further includes a second middle layer 513, where the second middle layer 513 is located between the second top layer 512 and the second bottom layer 511, and the refractive index of the second middle layer 513 is greater than the refractive index of the second top layer 512 and less than the refractive index of the second bottom layer 511. The second middle layer 513 is used to reduce the gradient of refractive index change between the second top layer 512 and the second bottom layer 511, which reduces the light reflectivity. The number of the second middle layers 513 may be one or more, and in the embodiment of the present application, the second middle layer 513 is taken as one, and in other embodiments, the number of the second middle layers 513 may be more, that is, a plurality of other second sub-layers 510 may be further disposed between the second top layer 512 and the second bottom layer 511.

As shown in fig. 4, in some alternative embodiments, an adhesive layer 600 is disposed between the light emitting layer 300 and the cover plate 400, and a third composite film layer 700 is disposed between the adhesive layer 600 and the cover plate 400; preferably, the refractive index of the third composite film layer 700 gradually decreases from one of the adhesive layer 600 and the cover plate 400, which has a larger refractive index, toward the other, the refractive index of the third composite film layer 700 is smaller than or equal to one of the adhesive layer 600 and the cover plate 400, and the refractive index of the third composite film layer 700 is greater than or equal to the other.

In these alternative embodiments, the material of the adhesive layer 600 may include OCA (Optically CLEAR ADHESIVE) optical cement disposed between the light-emitting layer 300 and the cover plate 400, and a third composite film layer 700 is disposed between the adhesive layer 600 and the cover plate 400, and the refractive index of the third composite film layer 700 gradually decreases from one of the adhesive layer 600 and the cover plate 400, which has a larger refractive index, toward the other. When the refractive index of the adhesive layer 600 is greater than the refractive index of the cap plate 400, the refractive index of the third composite film layer 700 gradually increases toward a direction away from the cap plate 400, and the maximum refractive index of the third composite film layer 700 is less than or equal to the refractive index of the adhesive layer 600, and the minimum refractive index of the third composite film layer 700 is greater than or equal to the refractive index of the cap plate 400. When the refractive index of the adhesive layer 600 is smaller than that of the cover plate 400, the refractive index of the third composite film layer 700 gradually decreases toward a direction away from the cover plate 400, and the maximum refractive index of the third composite film layer 700 is smaller than or equal to that of the cover plate 400, and the minimum refractive index of the third composite film layer 700 is greater than or equal to that of the adhesive layer 600. Alternatively, the third composite film layer 700 may include a plurality of third sub-layers 710, the refractive indexes of the plurality of third sub-layers 710 gradually decreasing from one of the cover plate 600 and the cover plate 400, which has a larger refractive index, toward the other, and the maximum refractive index of the third sub-layers 710 being smaller than or equal to one of the cover plate 400 and the cover plate 600, and the minimum refractive index of the third sub-layers 710 being greater than or equal to one of the cover plate 400 and the cover plate 600, which has a smaller refractive index.

As shown in fig. 4, in some alternative embodiments, the third composite film 700 includes a plurality of third sub-layers 710 stacked in a direction away from the cover plate 400, the refractive index of the plurality of third sub-layers 710 gradually decreasing from one of the adhesive layer 600 and the cover plate 400, which has a larger refractive index, toward the other

For convenience of description, taking the case that the refractive index of the adhesive layer 600 is smaller than that of the cover plate 400, the direction in which the light is incident from the cover plate 400 to the adhesive layer 600 is described in detail, the plurality of third sub-layers 710 are sequentially stacked in a direction away from the cover plate 400, the refractive index of the plurality of third sub-layers 710 gradually decreases in a direction away from the cover plate 400, that is, the refractive index of the third sub-layer 710 closest to the cover plate 400 is the largest and smaller than that of the cover plate 400, the refractive index of each layer decreases in a direction away from the cover plate 400, and the refractive index of the third sub-layer 710 furthest from the cover plate 400 is the smallest and larger than that of the adhesive layer 600. The provision of the plurality of third sublayers 710 reduces the gradient of the refractive index of the adhesive layer 600 and the refractive index of the cover plate 400, and the case that light enters the plurality of third sublayers 710 from the cover plate 400 first and then enters the adhesive layer 600 is taken as an example, light enters the layer with the largest refractive index in the third sublayers 710 from the cover plate 400 first, that is, the light enters the layer with the closest refractive index to the cover plate 400 in the third sublayers 710 from the cover plate 400 first, and the light sequentially passes through the plurality of third sublayers 710 with gradually decreasing refractive indexes in the third composite film layer 700, and finally enters the adhesive layer 600 through the layer with the smallest refractive index in the plurality of third sublayers 710, so that the gradient of the refractive index between the cover plate 400 and the adhesive layer 600 is reduced, the interface reflection is reduced, the light transmittance is improved, and the anti-reflection effect is achieved.

As shown in fig. 4, in some alternative embodiments, the light-transmitting display panel includes a light-transmitting region 900, the light-emitting layer 300 includes a plurality of sub-pixels 310, and the sub-pixels 310 and the light-transmitting region 900 are disposed in a staggered manner; a filter layer 800 is disposed between the light emitting layer 300 and the cover plate 400, and the filter layer 800 includes a filter unit, and a front projection of the filter unit on the light emitting layer 300 covers the plurality of sub-pixels 310.

In these alternative embodiments, the light emitting layer 300 includes a plurality of sub-pixels 310 arranged in an array, and the plurality of sub-pixels 310 may include a first sub-pixel 311, a second sub-pixel 312, and a third sub-pixel 313, where the first sub-pixel 311 may be a red sub-pixel 310, the second sub-pixel 312 may be a green sub-pixel 310, and the third sub-pixel 313 may be a blue sub-pixel 310, where the material of the sub-pixel 310 includes an opaque material, and the sub-pixels 310 are disposed in a staggered manner with respect to the light transmissive region 900, that is, the front projection of the sub-pixel 310 on the substrate 100 does not overlap with the front projection of the light transmissive region 900 on the substrate 100, so that the display panel may have a light transmissive effect, thereby forming a light transmissive display panel.

Optionally, a plurality of sub-pixels 310 are disposed on a side of the substrate 100 facing away from the first composite film layer 200, the sub-pixels 310 are made of opaque material, and a space region between the sub-pixels 310 is a light-transmitting region 900.

The sub-pixel 310 includes a common electrode, a pixel electrode, etc., and materials of the common electrode and the pixel electrode include a metal material, and when light is incident on the metal material, the reflectivity is high, which affects the light transmission effect of the light-transmitting display panel. The filter layer 800 includes a filter unit, where the front projection of the filter unit on the light emitting layer 300 covers the plurality of sub-pixels 310, that is, the front projection of the filter unit on the light emitting layer 300 covers the plurality of sub-pixels 310, where the filter unit may be made of a material with a lower light transmittance, when light passes through the filter unit to the sub-pixels 310, the light intensity of the light passing through the filter unit to the sub-pixels 310 may be reduced due to the lower light transmittance, and the light intensity of the light is reduced again when the light reflected on the sub-pixels 310 passes through the filter unit again, so as to reduce the influence of the reflected light on the light transmission effect of the light transmission display panel.

The Filter unit may be a Color Filter (CF), and the color Filter may be obtained by patterning a color photoresist, where the color photoresist is mainly composed of a pigment resin and a photoresist, and the pigment resin has a characteristic of low light transmittance. Optionally, an encapsulation layer 320 may be further disposed between the light emitting layer 300 and the filter layer 800, where the encapsulation layer 320 is used to block moisture and air for the light emitting layer 300.

A second aspect of the present application provides a display device, including a light-transmitting display panel according to any one of the embodiments of the first aspect.

In some embodiments of the present application, the refractive index of the first composite film layer 200 gradually decreases in a direction away from the substrate 100, that is, the refractive index of the first composite film layer 200 gradually decreases from equal to or smaller than the refractive index of the substrate 100 to greater than or equal to 1 in a direction away from the substrate 100. When light enters the first composite film 200 from the substrate 100, the light firstly enters a layer with the largest refractive index in the first composite film 200, namely, the light firstly enters a layer with the refractive index closest to the substrate 100 in the first composite film 200 from the substrate 100, and the light sequentially passes through the film layers with gradually reduced refractive indexes in the first composite film 200, finally, air enters the layer with the smallest refractive index in the first composite film 200, and the gradient of the change of the refractive index between the air and the substrate 100 is reduced by arranging the first composite film 200, so that the interface reflectivity is reduced, the light transmittance is improved, and the anti-reflection effect is achieved.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A light-transmitting display panel, comprising:

A substrate;

The first composite film layer is arranged on one side of the substrate;

the light-emitting layer is arranged on one side of the substrate, which is away from the first composite film layer;

The difference between the refractive index of the first composite film layer and the refractive index of the substrate is within a first set threshold value, and the first set threshold value is smaller than or equal to the difference between the refractive index of the substrate and the refractive index of air.

2. The light-transmissive display panel of claim 1, wherein,

The first composite film layer comprises a plurality of first sub-layers which are stacked along the direction far away from the substrate, and the refractive indexes of the plurality of first sub-layers gradually decrease along the direction far away from the substrate;

Preferably, the refractive index of the first composite film layer is greater than or equal to 1 and less than or equal to the refractive index of the substrate.

3. The light-transmitting display panel according to claim 2, wherein the first sub-layer comprises a first top layer on a side thereof facing the substrate, the first top layer having a refractive index of less than or equal to 1.6;

Preferably, the first sub-layer includes a first bottom layer facing away from the substrate, and the refractive index of the first bottom layer is greater than or equal to 1.0.

4. The light-transmissive display panel of claim 1, wherein,

A second composite film layer is arranged on one side, away from the substrate, of the light-emitting layer, and the refractive index of the second composite film layer is larger than 1 and smaller than that of the light-emitting layer;

Preferably, the light-transmitting display panel further includes a cover plate, disposed on a side of the second composite film layer near the light-emitting layer, where the refractive index of the second composite film layer is greater than 1 and less than that of the cover plate.

5. The light-transmitting display panel according to claim 4, wherein the second composite film layer includes a plurality of second sub-layers stacked in a direction away from the cover plate, and refractive indexes of the plurality of second sub-layers gradually decrease in a direction away from the cover plate.

6. The transmissive display panel of claim 5, wherein the second sub-layer comprises a second bottom layer on a side of the second sub-layer facing the cover plate, the second bottom layer having a refractive index of less than 1.6;

preferably, the second sub-layer comprises a second top layer facing away from the cover plate, the second top layer having a refractive index greater than 1.

7. The light-transmitting display panel according to claim 4, wherein an adhesive layer is provided between the light-emitting layer and the cover plate, and a third composite film layer is provided between the adhesive layer and the cover plate;

Preferably, the refractive index of the third composite film layer gradually decreases from one of the adhesive layer and the cover plate, which has a larger refractive index, toward the other, the refractive index of the third composite film layer is smaller than or equal to the one of the adhesive layer and the cover plate, and the refractive index of the third composite film layer is greater than or equal to the other.

8. The light-transmitting display panel according to claim 7, wherein the third composite film layer includes a plurality of third sub-layers stacked in a direction away from the cover plate, and refractive indexes of the plurality of third sub-layers gradually decrease from one of the adhesive layer and the cover plate, which has a larger refractive index, toward the other.

9. The transmissive display panel of claim 4, wherein the transmissive display panel comprises a transmissive region, the light emitting layer comprises a plurality of sub-pixels, and the sub-pixels and the transmissive region are offset;

And a filter layer is arranged between the light-emitting layer and the cover plate, the filter layer comprises a filter unit, and the orthographic projection of the filter unit on the light-emitting layer covers the plurality of sub-pixels.

10. A display device comprising the light-transmitting display panel according to any one of claims 1 to 9.