Encapsulating cover plate and application thereof in organic electroluminescence device

Abstract

The invention belongs to the technical field of panel display, and discloses an encapsulating cover plate and application thereof in an organic electroluminescence device. The encapsulating cover plate uses a piece of photosensitive glass with photoinduced refractive index change or a transparent substrate provided with a transparent photosensitive material, interference pattern irradiation enables the photosensitive glass with photoinduced refractive index change or the transparent substrate provided with the transparent photosensitive material to present blended distribution of high and low refractive indexes, an original total reflection structure of the photosensitive glass or the transparent substrate is destroyed, and the light originally lost because of total reflection is reused after the light is reflected on the encapsulating cover plate, so that the dispersion effect of emergent light is improved, the emergent efficiency of the light and the angle of view are improved, and meanwhile, an effect of antireflection is achieved on the light in the external environment to a certain degree.

Description

technical field

[0001] The invention relates to a package cover plate of an organic electroluminescent device, in particular to a package cover plate of a top-emitting organic electroluminescent device, and belongs to the technical field of flat panel display. Background technique

[0002] With the development of multimedia technology and the advent of the information society, the performance requirements of flat panel displays are getting higher and higher. Organic Light Emitting Devices (OLEDs) are active light-emitting devices. Compared with the current mainstream thin-film transistor liquid crystal display (TFT-LCD), it has high contrast, wide viewing angle, low power consumption, fast response, and compact size. Thinner and other advantages have broad application prospects, such as OLED lighting, and are also regarded as one of the highly competitive future flat panel display technologies.

[0003] The basic structure of organic light emitting devices (Organic Light Em...

Examples

Embodiment 1

[0037] see figure 2 , the organic electroluminescent device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the substrate The device 2 is accommodated in the closed space formed by 1. Wherein the packaging cover plate 4 includes a high refractive index region 5 and a low refractive index region 6 , and the high refractive index region 5 and the low refractive index region 6 are mixed and distributed. The sealing medium 3 is made of UV colloid and / or Frit packaging material, and the substrate 1 and the packaging cover plate 4 are connected together by ultraviolet light and laser melting respectively.

[0038] In this embodiment, the package cover plate 4 is a photosensitive glass whose refractive index changes due to light, and the photosensitive glass exhibits a mixed distribution of high refractive index regions 5 and low refrac...

Embodiment 2

[0043] Such as image 3 As shown, the organic electroluminescence device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the The device 2 is accommodated in the closed space formed by the substrate 1 . Wherein, the packaging cover plate 4 is a transparent substrate 8 with a photosensitive material layer 7 on the lower surface, and the photosensitive material layer 7 exhibits a mixed distribution of high refractive index regions 5 and low refractive index regions 6 through interference pattern irradiation. The photosensitive material layer 7 is a lithium niobate layer.

[0044] As a variable embodiment of the present invention, the photosensitive material layer 7 can also be an ultraviolet photorefractive crystal material layer such as lithium niobate, magnesium or zinc doped lithium niobate, lithium borate, etc., an acrylamide-bas...

Embodiment 3

[0048] Such as Figure 4 As shown, the organic electroluminescence device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the The device 2 is accommodated in the closed space formed by the substrate 1 . Wherein, the packaging cover plate 4 is a transparent substrate 8 with a photosensitive material layer 7 disposed on its upper surface. The photosensitive material layer 7 presents high refractive index regions 5 and low refractive index regions 6 in a mixed distribution through the interference pattern irradiation. The photosensitive material layer 7 is an acrylamide-based photopolymer layer.

[0049] Such as Figure 10 As shown, the high-refractive-index regions 5 and low-refractive-index regions 6 described in this embodiment are distributed in a regular array. The low-refractive-index region 6 includes several lateral low-re...

technical field

[0001] The invention relates to a package cover plate of an organic electroluminescent device, in particular to a package cover plate of a top-emitting organic electroluminescent device, and belongs to the technical field of flat panel display. Background technique

[0002] With the development of multimedia technology and the advent of the information society, the performance requirements of flat panel displays are getting higher and higher. Organic Light Emitting Devices (OLEDs) are active light-emitting devices. Compared with the current mainstream thin-film transistor liquid crystal display (TFT-LCD), it has high contrast, wide viewing angle, low power consumption, fast response, and compact size. Thinner and other advantages have broad application prospects, such as OLED lighting, and are also regarded as one of the highly competitive future flat panel display technologies.

[0003] The basic structure of organic light emitting devices (Organic Light Em...

Examples

Embodiment 1

[0037] see figure 2 , the organic electroluminescent device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the substrate The device 2 is accommodated in the closed space formed by 1. Wherein the packaging cover plate 4 includes a high refractive index region 5 and a low refractive index region 6 , and the high refractive index region 5 and the low refractive index region 6 are mixed and distributed. The sealing medium 3 is made of UV colloid and / or Frit packaging material, and the substrate 1 and the packaging cover plate 4 are connected together by ultraviolet light and laser melting respectively.

[0038] In this embodiment, the package cover plate 4 is a photosensitive glass whose refractive index changes due to light, and the photosensitive glass exhibits a mixed distribution of high refractive index regions 5 and low refrac...

Embodiment 2

[0043] Such as image 3 As shown, the organic electroluminescence device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the The device 2 is accommodated in the closed space formed by the substrate 1 . Wherein, the packaging cover plate 4 is a transparent substrate 8 with a photosensitive material layer 7 on the lower surface, and the photosensitive material layer 7 exhibits a mixed distribution of high refractive index regions 5 and low refractive index regions 6 through interference pattern irradiation. The photosensitive material layer 7 is a lithium niobate layer.

[0044] As a variable embodiment of the present invention, the photosensitive material layer 7 can also be an ultraviolet photorefractive crystal material layer such as lithium niobate, magnesium or zinc doped lithium niobate, lithium borate, etc., an acrylamide-bas...

Embodiment 3

[0048] Such as Figure 4 As shown, the organic electroluminescence device described in this embodiment includes a substrate 1, and the substrate 1 and the packaging cover plate 4 are hermetically connected through a sealing medium 3, and the packaging cover plate 4 and the The device 2 is accommodated in the closed space formed by the substrate 1 . Wherein, the packaging cover plate 4 is a transparent substrate 8 with a photosensitive material layer 7 disposed on its upper surface. The photosensitive material layer 7 presents high refractive index regions 5 and low refractive index regions 6 in a mixed distribution through the interference pattern irradiation. The photosensitive material layer 7 is an acrylamide-based photopolymer layer.

[0049] Such as Figure 10 As shown, the high-refractive-index regions 5 and low-refractive-index regions 6 described in this embodiment are distributed in a regular array. The low-refractive-index region 6 includes several lateral low-re...

Images