KR-20260067392-A - DISPLAY MODULE, ELECTRONIC DEVICE AND METHOD FOR MANUFACTURING DISPLAY MODULE

Abstract

The electronic device of the present invention comprises a display panel and a light control layer disposed on the display panel, wherein the light control layer comprises a first refractive layer disposed on the display panel and a second refractive layer disposed on the first refractive layer, wherein the refractive index of the first refractive layer for visible light is 1.2 or higher and 1.5 or lower, and the second refractive layer comprises a metamaterial, and the refractive index of the second refractive layer for visible light is -2.0 or higher and -0.1 or lower.

Inventors

• 박용준
• 이영석

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260513

Application Date

20241104

Claims (20)

1. Display panel; and A light control layer disposed on the above-mentioned display panel; comprising The above light control layer It includes a first refractive layer disposed on the above-mentioned display panel and a second refractive layer disposed on the first refractive layer, and The refractive index of the first refractive layer for visible light is 1.2 or higher and 1.5 or lower, and A display module in which the second refractive layer comprises a metamaterial, and the refractive index of the second refractive layer for visible light is -2.0 or greater and -0.1 or less.
2. In paragraph 1, The light control layer further comprises a third refractive layer disposed on the second refractive layer, and the refractive index of the third refractive layer for visible light is 1.2 or higher and 1.5 or lower, in a display module.
3. In paragraph 2, A display module in which the first refractive layer and the third refractive layer each independently comprise at least one of SiO₂ and MgF₂ .
4. In paragraph 2, A display module in which the thickness of the first refractive layer and the thickness of the third refractive layer are each independently 10 nm or more and 500 nm or less.
5. In paragraph 2, The light control layer further comprises a plurality of refractive lenses disposed on the third refractive layer, forming a display module.
6. In paragraph 5, A display module in which each of the plurality of refractive lenses comprises a metamaterial, and the refractive index of each of the plurality of refractive lenses for visible light is -2.0 or greater and -0.1 or less.
7. In paragraph 2, The light control layer further includes a fourth refractive layer disposed on the third refractive layer, and A display module in which the fourth refractive layer comprises a metamaterial, and the refractive index of the fourth refractive layer for visible light is -2.0 or greater and -0.1 or less.
8. In paragraph 2, The second refractive layer includes a plurality of lower refractive patterns, and each of the plurality of lower refractive patterns is spaced apart from each other with a space between them. The third refractive layer comprises a plurality of upper refractive patterns each disposed on top of each of the plurality of lower refractive patterns, forming a display module.
9. In paragraph 8, Each of the above plurality of lower refraction patterns is a display module that includes a rectangular shape on a plane.
10. In Paragraph 9, Each of the above plurality of lower refraction patterns is a display module having a side length of 10 nm or more and 500 nm or less on a plane.
11. In paragraph 8, A display module in which the distance between each of the above plurality of refraction patterns on a plane is 50 nm or more and 500 nm or less.
12. In paragraph 1, The second refractive layer comprises at least one of a metal, a metal oxide, and a metal halide.
13. In paragraph 1, The second refractive layer comprises at least one of Au, TiO2 , SiO2 , MgF, and Ta2O5 , forming a display module.
14. In paragraph 1, A display module in which the extinction coefficient of the second refractive layer for visible light is 0.
15. In paragraph 1, A display module having a second refractive layer with a thickness of 10 nm or more and 300 nm or less.
16. Housing; A display module housed within the above housing; and A window disposed on the above display module; including, The above display module is It includes a display panel and a light control layer disposed on the display panel, and The above light control layer It includes a first refractive layer disposed on the above-mentioned display panel and a second refractive layer disposed on the first refractive layer, and The refractive index of the first refractive layer for visible light is 1.2 or higher and 1.5 or lower, and An electronic device in which the second refractive layer comprises a metamaterial, and the refractive index of the second refractive layer for visible light is -2.0 or greater and -0.1 or less.
17. A step of forming a first refractive layer on a display panel; and The step of forming a second refractive layer on the first refractive layer; is included, The refractive index of the first refractive layer for visible light is 1.2 or higher and 1.5 or lower, and A method for manufacturing a display module in which the second refractive layer comprises a metamaterial, and the refractive index of the second refractive layer for visible light is -2.0 or higher and -0.1 or lower.
18. In Paragraph 17, A method for manufacturing a display module, further comprising the step of forming a third refractive layer on the second refractive layer after the step of forming the second refractive layer.
19. In Paragraph 18, The step of forming the second refractive layer above The method includes the steps of forming a preliminary second refractive layer on the first refractive layer, and etching a portion of the preliminary second refractive layer to form a plurality of lower refractive patterns spaced apart from each other with a space between them. The step of forming the third refractive layer above A method for manufacturing a display module comprising the step of forming a plurality of upper refraction patterns, each disposed on the upper portion of each of the plurality of lower refraction patterns.
20. In Paragraph 17, A method for manufacturing a display module in which the second refractive layer comprises at least one of Au, TiO2 , SiO2 , MgF , and Ta2O5 .

Description

Display module, electronic device and method for manufacturing display module The present invention relates to a display module, an electronic device, and a method for manufacturing a display module, comprising a light control layer that controls light having an emission angle greater than or equal to a predetermined angle. As the information society develops, the demand for display devices to display images is increasing in various forms. For example, display devices are being applied to a wide range of electronic devices, such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions. Additionally, display devices can be applied to Center Information Displays (CIDs) located on the instrument panel, center fascia, or dashboard of automobiles. Meanwhile, research is being conducted on limiting the viewing angle of display devices to prevent driver distraction and protect the personal information of personal electronic device users. FIG. 1 is a drawing illustrating the interior of a vehicle in which an electronic device according to one embodiment of the present invention is arranged. FIG. 2 illustrates an image of an electronic device according to one embodiment of the present invention as seen from the driver's seat of a vehicle. FIG. 3 illustrates an image of an electronic device according to one embodiment of the present invention being visible from the passenger seat of a vehicle. FIG. 4 is a schematic diagram illustrating the viewing angle of an image of an electronic device according to one embodiment of the present invention. FIGS. 5 and FIGS. 6 are each perspective views of an electronic device according to an embodiment of the present invention. FIG. 7a is an exploded perspective view of an electronic device according to one embodiment of the present invention. FIG. 7b is a block diagram of an electronic device according to one embodiment of the present invention. FIG. 8 is a plan view of a display module according to one embodiment of the present invention. Figures 9 and 11 are cross-sectional views taken along line II' of Figure 8, respectively. FIG. 12 is an enlarged plan view of the TT' region of FIG. 8. FIG. 13 is a cross-sectional view taken along the line II-II' of FIG. 12. FIG. 14 is an enlarged plan view of the TT' region of FIG. 8. FIG. 15 is a cross-sectional view taken along the line III-III' of FIG. 14. FIGS. 16a and FIGS. 16b are flowcharts illustrating a method for manufacturing a display module of one embodiment. FIGS. 17 to 22 are each cross-sectional views showing a part of a method for manufacturing a display module according to one embodiment. FIG. 23a is a graph showing the results of simulating the light intensity of each of the Comparative Example 1 display module and the Example 1 display module according to the viewing angle. FIG. 23b is a cross-sectional view of the display module of Comparative Example 1. FIG. 24 is a graph showing the results of simulating the light efficiency of each of the display modules of Comparative Example 2 and Examples 2 to 4 according to the viewing angle. The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "combined" with another component, it means that it may be directly placed/connected/combined with the other component, or that a third component may be placed between them. Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. "And/or" includes all one or more combinations that the associated components may define. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. Additionally, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. Terms such as "include" or "have" are intended to specify the exist