WO2015165157A1 - Organic electroluminescent device, liquid crystal display device, and lighting device - Google Patents

Abstract

An organic electroluminescent device, a liquid crystal display device, and a lighting device. The organic electroluminescent device comprises a substrate (1), a light-emitting structure (2) formed on the substrate (1), and a packaging film (3) that matches with the substrate (1) in a sealed mode to package the light-emitting structure (2) on the substrate (1), wherein a light-emitting direction of the light-emitting structure (2) faces the packaging film (3). A plurality of monochromatic filtering parts arranged in sequence is formed on the packaging film (3), and the monochromatic filtering parts are in at least two colors. Therefore, when the light rays emitted by the light-emitting structure (2) of the organic electroluminescent device penetrate the packaging film (3), the light rays penetrating the monochromatic filtering parts in different colors are different in color. Accordingly, the organic electroluminescent device can emit the light rays in various colors simultaneously, and diversity of the colors of the light rays emitted by the organic electroluminescent device is achieved.

Description

 Organic electroluminescent device, liquid crystal display device and lighting device

Technical field

 The present invention relates to the field of display technologies, and in particular, to an organic electroluminescent device, a liquid crystal display device, and an illumination device. Background technique

 The OLED (Organic Light Emitting Diode) device is an organic electroluminescent device, which has the advantages of high luminous efficiency, easy formation of a flexible structure, and the like, and the thickness of the device can be greatly reduced when packaged by a thin film package, which is beneficial to current consumption. Light and thin requirements for display and lighting devices.

 The purpose of thin film encapsulation of OLED devices is to prevent oxygen and moisture in the environment from entering the inside of the device, preventing oxygen and moisture from coming into contact with organic substances and electrodes inside the device, thereby improving the service life of the OLED device.

 However, in the prior art, each OLED device is packaged with a white light or a single color of light, and the illumination color is single. Summary of the invention

 Embodiments of the present invention provide an organic electroluminescent device, a liquid crystal display device, and a lighting device, which can simultaneously emit light of a plurality of colors, thereby realizing diversification of color of organic electroluminescent device .

 In order to achieve the above object, an embodiment of an aspect of the present invention provides the following technical solutions:

 An organic electroluminescent device comprising: a substrate; an electroluminescent structure formed on the substrate; and an encapsulation film sealingly mated with the substrate to encapsulate the light emitting structure on the substrate, the electricity The light-emitting direction of the light-emitting structure faces the package film, wherein: the package film forms a plurality of monochromatic filter portions, and the plurality of monochromatic filter portions have a color of at least two kinds of single colors.

In the above organic electroluminescent device, the electroluminescent structure is a plurality of electroluminescent structures, each of the monochromatic filters being opposed to at least one of the electroluminescent structures along a thickness direction of the substrate Providing, wherein: the monochromatic filter portion and the electroluminescent structure are projected on a surface of the substrate facing the package film, and a projection of the monochromatic filter portion covers the electroluminescence The projection of the structure. In the above organic electroluminescent device, in the above organic electroluminescent device, the encapsulating film is composed of a multilayer organic encapsulating film layer and a multi-layer inorganic encapsulating film layer; the multi-layer organic encapsulating film layer and a plurality of layers of inorganic The encapsulation film layer is disposed to provide an inorganic encapsulation film layer between each two layers of the organic encapsulation film layer, and an organic encapsulation film layer is disposed between each two layers of the inorganic encapsulation film layer, wherein at least one layer of the inorganic encapsulation layer is disposed A portion of the film layer corresponding to the electroluminescent structure is doped with metal ions to form the plurality of monochromatic filters.

 In the above organic electroluminescent device, in at least two layers of the inorganic encapsulating film layer, a portion of the inorganic encapsulating film layer corresponding to the electroluminescent structure is doped with metal ions to form a filter layer. Projecting the filter layer on a surface of the substrate facing the encapsulation film, the projection of the filter layer at least partially overlapping; at least two layers of the filter layer having at least two colors.

 In the above organic electroluminescent device, the color of one of the filter layers is the first color, and the color of the other of the filter layers is the second color; along the thickness of the substrate Direction, in the encapsulating film, a portion corresponding to at least partially overlapping the projection of the filter layer forms a monochromatic filter portion, the color of the monochromatic filter portion being a first color and a second color mixture a third color formed; only the portion of the filter layer having the first color forms a monochromatic filter, the color of the monochromatic filter is the first color; only the second The portion of the color filter layer forms a monochromatic filter portion, and the color of the monochromatic filter portion is the second color.

 In the above organic electroluminescent device, the first color is green; the second color is blue; and the third color is cyan.

 In the above organic electroluminescent device, each of the inorganic encapsulating film layers is a silicon dioxide film layer, and one of the inorganic encapsulating film layers is doped with nickel in a portion corresponding to the electroluminescent structure. And ion forming a filter layer of the first color, wherein a portion of the other of the inorganic encapsulation film layers corresponding to the electroluminescent structure is doped with cobalt ions to form a filter of the second color Light layer.

 According to an embodiment of another aspect of the present invention, a liquid crystal display device includes a backlight module, and the backlight module includes the above organic electroluminescent device.

 According to an embodiment of the present invention, there is provided an illumination device comprising the above-described organic electroluminescence device. DRAWINGS

 1 is a schematic structural view of an organic electroluminescent device according to an embodiment of the present invention;

FIG. 2 is a schematic view showing a distribution of a filter portion of a package film in the organic electroluminescent device shown in FIG. 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific embodiments of the present invention will be further described in detail below with reference to the drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

 In the following detailed description, numerous specific details are set forth It is apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in the drawings.

 According to a general inventive concept of the present invention, an organic electroluminescent device is provided, comprising: a substrate; an electroluminescent structure formed on the substrate; and a sealing fit with the substrate to illuminate the light And a light-emitting direction of the light-emitting structure is directed toward the package film, wherein: the package film forms a plurality of monochromatic filter portions, and the plurality of monochromatic filter portions have a color at least For two colors.

 1 and FIG. 2, wherein FIG. 1 is a schematic structural view of an organic electroluminescent device according to an embodiment of the present invention; FIG. 2 is a filter of an encapsulating film in the organic electroluminescent device shown in FIG. Schematic diagram of the distribution of the department.

 An organic electroluminescent device provided by an embodiment of the present invention includes a substrate 1, an electroluminescent structure 2 formed on the substrate 1, and an encapsulation film 3 sealed with the substrate 1 to encapsulate the light emitting structure 2 on the substrate 1. The light-emitting structure 2 has a light-emitting direction toward the encapsulation film 3, wherein: the encapsulation film 3 forms a plurality of monochromatic filter portions, and the plurality of monochromatic filter portions have at least two kinds of monochromatic colors; as shown in FIG. 1 and FIG. The monochromatic filter portion A, the monochromatic filter portion B, and the monochromatic filter portion C are shown, and the colors of the monochromatic filter portion A, the monochromatic filter portion B, and the monochromatic filter portion C are different. .

 As shown in Fig. 1, a plurality of monochromatic filter portions are projected on the substrate 1 toward the side surface of the package film 3, and the projections are sequentially arranged.

 In the above organic electroluminescence device, the encapsulating film 3 is formed with a plurality of monochromatic filter portions while being packaged together with the substrate 1, and the plurality of monochromatic filter portions include at least two colors of monochrome. Therefore, when the light emitted from the light-emitting structure 2 of the organic electroluminescence device passes through the package film 3, the light emitted through the monochromatic filter portions of different colors is different in color.

 Therefore, the above-mentioned organic electroluminescent device provided by the present invention can simultaneously emit light of a plurality of colors, thereby realizing diversification of the color of light emitted from the organic electroluminescent device.

 According to an embodiment of the invention, the electroluminescent structure 2 is a plurality of electroluminescent structures, each of which is disposed opposite the at least one electroluminescent structure along the thickness direction of the substrate 1, wherein:

In each of the monochromatic filter portions and the respective electroluminescent structures disposed opposite thereto, the monochromatic filter portion and the electroluminescent structure are performed on the substrate 1 toward the side surface of the encapsulating film 3 Projection, the monochromatic filter The projection of the portion covers the projection of the electroluminescent structure.

 Therefore, during the use of the organic electroluminescent device, the type of color in the light emitted from the organic electroluminescent device can be adjusted by controlling whether the electroluminescent structure corresponding to each monochromatic filter portion emits light, thereby further improving the organic electricity. The diversity of the luminescent color of the luminescent device.

 In an embodiment of the invention, the electroluminescent structure 2 has a plurality of electroluminescent structures arranged in the same direction as the plurality of monochromatic filter portions, and each of the monochromatic filters and one The electroluminescent structures are arranged oppositely. As shown in FIGS. 1 and 2, the monochromatic filter portion A is disposed opposite to the electroluminescence structure 21, and the monochromatic filter portion B is disposed opposite to the electroluminescence structure 22, and the monochromatic filter portion C and electroluminescence are provided. Structure 23 is relatively set. During the use of the above organic electroluminescent device, the electroluminescent structure 21, the electroluminescent structure 22, and the electroluminescent structure 23 can be individually controlled to emit light, thereby adjusting whether or not a single color is present in the light emitted by the organic electroluminescent device. The color of the filter portion, the monochromatic filter portion B, and the monochromatic filter portion C adjusts the color of the light emitted from the organic electroluminescent device, and improves the diversity of the color of the organic electroluminescent device.

 As shown in FIG. 1 , in the embodiment of the present invention, the encapsulating film 3 of the organic electroluminescent device forms a plurality of monochromatic filter portions, and the encapsulating film 3 comprises the multi-layer organic encapsulating film layer and the multi-layer inorganic layer. The encapsulation film layer, the multi-layer organic encapsulation film layer and the multi-layer inorganic encapsulation film layer are disposed such that an inorganic encapsulation film layer is disposed between each two layers of the organic encapsulation film layer, and is disposed between each two layers of the inorganic encapsulation film layer An organic encapsulating film layer, such as the organic encapsulating film layer 31, the organic encapsulating film layer 33, the organic encapsulating film layer 35, and the organic encapsulating film layer 37, as shown in FIG. 1, and the inorganic encapsulating film layer 32 shown in FIG. The inorganic encapsulating film layer 34 and the inorganic encapsulating film layer 36; wherein at least one of the inorganic encapsulating film layers is doped with metal ions to form a plurality of monochromatic filters.

 As shown in FIG. 1, at least one layer of the inorganic encapsulating film is doped with metal ions to form a plurality of monochromatic filters. In an embodiment of the present invention, in at least two inorganic encapsulating film layers, a portion of each of the inorganic encapsulating film layers corresponding to the electroluminescent structure is doped with metal ions to form a color filter layer, Each of the filter layers is projected on a side surface of the substrate 1 facing the package film 3, the projection of the filter layer at least partially overlapping, and a color of one of the filter layers is a first color, The color of the other layer in the filter layer is a second color; in the thickness direction of the substrate, a portion of the encapsulation film corresponding to at least partially overlapping the projection of the filter layer forms a monochromatic filter In the light portion, the color of the monochromatic filter portion is a third color formed by mixing the first color and the second color.

In other words, in an embodiment of the invention, a plurality of monochromatic filter portions are formed in the encapsulation film, and the plurality of monochromatic filter portions respectively have a monochromatic filter layer for the plurality of monochromatic filter layers Projecting on the side surface of the substrate 1 facing the packaging film 3, the projection of one monochromatic filter layer overlaps with the projection portion of the other monochromatic filter layer, and a part of the monochromatic filter layer corresponding to the projection overlap constitutes a a monochromatic filter, corresponding to a portion of the monochromatic filter layer that does not overlap the projection Into another monochromatic filter. For a monochromatic filter portion corresponding to a partial monochromatic filter layer whose projection overlaps, the color of the emitted light is a color of light mixed by light rays respectively emitted from the two monochromatic filter layers overlapped. The emitted light rays constituting the other monochromatic filter portions corresponding to the partial monochromatic filter layers that do not overlap the projections are the color of the light emitted from the individual monochromatic filter layers. The monochromatic filter portion in the embodiment according to the present invention is constituted by the above-described monochromatic filter portion.

 More specifically, as shown in FIG. 1 , a portion of the inorganic encapsulating film layer 32 corresponding to the electroluminescent structure is doped with a metal ion to form a first color filter layer 321 , and the inorganic encapsulating film layer 34 a portion corresponding to the electroluminescent structure is doped with another metal ion to form a second color filter layer 341, and the filter layer is disposed on the substrate 1 toward the side surface of the package film 3 Projection, the filter layer 321 of the first color and the filter layer 341 of the second color overlap at the projection portion of the substrate 1 toward the side surface of the package film 3, as shown in Fig. 1, the filter of the second color The projection of the E2 portion in the light layer 341 and the projection of the D2 portion in the filter layer 321 of the first color overlap each other; wherein, in the thickness direction of the substrate 1, in the package film 2: the filter having the first color The projection of the D2 portion in the layer 321 and the E2 portion of the filter layer 341 of the second color overlap each other, and the D2 portion and the E2 portion together form a monochromatic filter portion B, and the monochromatic filter portion B The color is the first color and the second color a third color formed;

 Only the portion of the filter layer 321 having the first color forms a monochromatic filter portion C, as shown in Fig. 1, the D1 portion of the filter layer 321 of the first color, the color of the monochromatic filter portion C For the first color;

 Only the portion of the filter layer 341 having the second color forms a monochromatic filter portion A, as shown in Fig. 1, the E1 portion of the filter layer 341 of the second color, the color of the monochromatic filter portion A For the second color.

 In a preferred embodiment, in the above embodiment:

 The first color is green, that is, the color of the monochromatic filter C is green;

 The second color is blue, that is, the color of the monochrome filter A is blue;

 The third color is cyan, that is, the color of the monochromatic filter portion B is cyan which is a mixture of green and blue.

 In the embodiment of the present invention, the inorganic encapsulating film layer 32, the inorganic encapsulating film layer 34, and the inorganic encapsulating film layer 34 are all silicon dioxide film layers, and the inorganic encapsulating film layer 32 is doped with nickel ions to form the first type. The color filter layer 321 and the inorganic encapsulating film layer 34 are doped with cobalt ions to form a second color filter layer 341.

 Of course, there are other options for the number and arrangement of the filter portions in the package film 3. The filter portions of the package film 3 can also be obtained by other means, and are not described herein.

The embodiment of the invention further provides a liquid crystal display device, which comprises a backlight module, and the backlight module comprises any of the organic electroluminescent devices provided by the above embodiments. The embodiment of the invention further provides a lighting device, which comprises any of the organic electroluminescent devices provided by the above embodiments. The illumination device is capable of emitting illumination light of a plurality of colors.

 It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications

Claims

claims 1. An organic electroluminescent device, which includes: substrate; an electroluminescent structure formed on the substrate; and An encapsulation film that sealingly cooperates with the substrate to encapsulate the light-emitting structure on the substrate, and the light emitting direction of the electroluminescent structure is toward the encapsulation film, where: The packaging film forms a plurality of single-color filter parts, and the colors of the plurality of single-color filter parts are at least two single colors. 2. The organic electroluminescent device according to claim 1, wherein the electroluminescent structure is a plurality of electroluminescent structures, and each of the single-color filter portions is formed along the thickness direction of the substrate. disposed opposite at least one of said electroluminescent structures, wherein: The monochromatic filter part and the electroluminescent structure are projected on the side surface of the substrate facing the packaging film, and the projection of the monochromatic filter part covers the projection of the electroluminescent structure. 3. The organic electroluminescent device according to claim 1, characterized in that, The encapsulation film includes a multi-layer organic encapsulation film layer and a multi-layer inorganic encapsulation film layer; the multi-layer organic encapsulation film layer and the multi-layer inorganic encapsulation film layer are arranged such that a gap is provided between every two organic encapsulation film layers. layer of inorganic encapsulation film, and an organic encapsulation film layer is provided between each two layers of inorganic encapsulation film, where, The portions of at least one of the inorganic encapsulating film layers corresponding to the electroluminescent structure are doped with metal ions to form the plurality of single-color filter portions. 4. The organic electroluminescent device according to claim 3, characterized in that In at least two layers of the inorganic encapsulation film layer, the portion of each layer of the inorganic encapsulation film layer corresponding to the electroluminescent structure is doped with metal ions to form a filter layer, The filter layer is projected on a side surface of the substrate facing the packaging film, and the projections of the filter layer at least partially overlap; at least two of the filter layers have at least two colors. 5. The organic electroluminescent device according to claim 4, characterized in that, The color of one layer of the filter layer is the first color, and the color of the other layer of the filter layer is the second color; along the thickness direction of the substrate, in the packaging film, corresponding A single-color filter portion is formed at a location where the projections of the filter layer at least partially overlap, and the color of the single-color filter portion is a third color formed by mixing the first color and the second color; The portion of the filter layer having only the first color forms a single-color filter portion, and the color of the single-color filter portion is Color is the first color; The portion of the filter layer having only the second color forms a single-color filter portion, and the color of the single-color filter portion is the second color. 6. The organic electroluminescent device according to claim 5, characterized in that: The first color is green; The second color is blue; The third color is cyan. 7. The organic electroluminescent device according to claim 6, wherein each layer of the inorganic encapsulating film layer is a silicon dioxide film layer, and one of the inorganic encapsulating film layers is in contact with the electroluminescent film. The portion corresponding to the light-emitting structure is doped with nickel ions to form the filter layer of the first color, and the other layer of the inorganic packaging film layer is doped with cobalt ions in the portion corresponding to the electroluminescent structure. To form the filter layer of the second color. 8. A liquid crystal display device including a backlight module, characterized in that the backlight module includes an organic electroluminescent device as described in any one of claims 1 to 7. 9. A lighting device, characterized by comprising the organic electroluminescent device according to any one of claims 1 to 8.