KR-102962714-B1 - Color filter unit and display apparatus including the same

Abstract

The present invention provides a display device comprising a color filter unit with improved light efficiency and color reproducibility and a display device including the same, wherein the display device comprises a first pixel, a second pixel, and a third pixel emitting different colors on a first substrate, wherein each of the first pixel and the second pixel comprises: a light scattering layer disposed to correspond to the display element; and a color conversion layer disposed on the light scattering layer and comprising quantum dots that convert incident light into light of a predetermined color, wherein the light scattering layer and the color conversion layer each comprise first scattering particles and second scattering particles, and first quantum dots and second quantum dots.

Inventors

• 최원규

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20190909

Claims (20)

1. A display device comprising a first pixel, a second pixel, and a third pixel, each including a display element that emits different colors on a first substrate, Each of the above first pixel and the above second pixel is, A light scattering layer arranged to correspond to the above-mentioned display element and comprising first scattering particles and first quantum dots; and A color conversion layer disposed on the light scattering layer and comprising second scattering particles and second quantum dots that convert incident light into light of a predetermined color; and A display device in which the concentration of the first scattering particles in the light scattering layer is higher than the concentration of the second scattering particles included in the color conversion layer.
2. delete
3. In paragraph 1, A display device in which the concentration of the first quantum dots in the light scattering layer is different from the concentration of the second quantum dots included in the color conversion layer.
4. In paragraph 3, A display device in which the concentration of the first scattering particles is at least twice the concentration of the second scattering particles.
5. In paragraph 3, A display device in which the concentration of the second quantum dots is at least twice the concentration of the first quantum dots.
6. In paragraph 1, The above third pixel is, A first transparent layer arranged to correspond to the display element of the third pixel; and A second transparent layer disposed on the first transparent layer; further comprising The first transmission layer comprises the first scattering particles, A display device comprising the second transparent layer containing the second scattering particles.
7. In paragraph 6, A display device in which the concentration of the second scattering particles included in the second transparent layer is higher than the concentration of the first scattering particles included in the first transparent layer.
8. In Paragraph 7, The above third pixel is a display device that emits blue light.
9. In paragraph 8, A display device comprising a plurality of color filters corresponding to each of the first pixel, the second pixel, and the third pixel, and selectively transmitting light of a predetermined color,
10. In Paragraph 9, A display device further comprising a first light-blocking layer disposed between each of the above plurality of color filters.
11. In Paragraph 10, A display device further comprising a second light-blocking layer disposed between the color conversion layer corresponding to each of the first pixel and the second pixel and the second transmission layer.
12. In Paragraph 11, A display device further comprising a light scattering layer corresponding to each of the first pixel and the second pixel, and a third light-blocking layer disposed between each of the first transmission layer.
13. In Paragraph 12, A display device having sides of the second light-blocking layer and the third light-blocking layer having an inverse taper shape.
14. In Paragraph 12, A display device having sides of the second light-blocking layer and the third light-blocking layer having a tapered shape.
15. In Paragraph 9, A display device further comprising the plurality of color filters, the color conversion layer, and the first inorganic insulating layer interposed between the second transmission layer.
16. In Paragraph 9, A display device further comprising a second inorganic insulating layer interposed between the color conversion layer and the second transparent layer, and the light scattering layer and the first transparent layer.
17. In Paragraph 9, It further includes a second substrate positioned opposite to the first substrate, and The above plurality of color filters are a display device directly disposed on the second substrate.
18. In Paragraph 9, A display device further comprising a thin film encapsulation layer disposed on the first to third pixels, the thin film encapsulation layer comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer.
19. In Paragraph 18, A display device in which the light scattering layer and the first transparent layer are disposed on the thin film encapsulation layer.
20. In Paragraph 12, A display device further comprising a third inorganic insulating layer disposed to cover the light scattering layer and the third light-blocking layer.

Description

Color filter unit and display apparatus including the same The present invention relates to a color filter unit and a display device including the same, and more specifically, to a color filter unit with improved light efficiency and color reproducibility and a display device including the same. A display device is a device that visually displays data. Display devices are used as display units for small products such as mobile phones, as well as for large products such as televisions. A display device includes multiple pixels that receive electrical signals and emit light to display an image externally. Each pixel includes a light-emitting element; for example, in the case of an organic light-emitting display device, it includes an organic light-emitting diode (OLED) as the light-emitting element. Generally, an organic light-emitting display device forms thin-film transistors and organic light-emitting diodes on a substrate, and operates by the organic light-emitting diode emitting light on its own. Recently, as the applications of display devices have diversified, various design attempts are being made to improve their quality. In particular, as the resolution of display devices increases, research aimed at enhancing the color reproduction of each pixel is actively underway. FIG. 1 is a schematic perspective view illustrating a display device according to one embodiment of the present invention. FIG. 2 is a schematic plan view of a display device according to one embodiment of the present invention. FIG. 3 is an equivalent circuit diagram of a subpixel that may be included in a display device according to one embodiment of the present invention. FIGS. 4 and FIGS. 5 are cross-sectional views schematically illustrating a display device according to one embodiment of the present invention. FIG. 6 is an enlarged view illustrating a plurality of filter sections according to one embodiment of the present invention. FIG. 7 is a cross-sectional view schematically illustrating a color filter unit according to one embodiment of the present invention. Figure 8 is an enlarged view of the first filter section of Figure 7. FIG. 9 is a cross-sectional view schematically illustrating a color filter unit according to one embodiment of the present invention. Figure 10 is an enlarged view of the first filter section of Figure 9. FIGS. 11 and FIGS. 12 are cross-sectional views schematically illustrating a color filter unit according to one embodiment of the present invention. FIG. 13 is an enlarged view of the first filter section of FIG. 12. FIGS. 14 and FIGS. 15 are cross-sectional views schematically illustrating a display device according to one embodiment of the present invention. FIGS. 16 to 18 illustrate electronic devices to which a display device according to one embodiment of the present invention is applied. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the following embodiments, when a part such as a film, region, or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where another film, region, or component is interposed in between. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated. Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substant