KR-20260064316-A - DISPLAY APPARARTUS AND METHOD OF MANUFACTURING THE DISPLAY APPARARTUS

Abstract

A display device according to one embodiment includes a first light-emitting element, a second light-emitting element, and a first lens that are sequentially stacked, and the first lens may include a first interference pattern that reflects a first incident light emitted from a first focal point located outside the first lens to form parallel light, and a second interference pattern that reflects a second incident light emitted from a second focal point located outside the first lens to form parallel light.

Inventors

• 김선일
• 최준희
• 황경욱

Assignees

• 삼성전자주식회사

Dates

Publication Date

20260507

Application Date

20241031

Claims (20)

1. A first light-emitting element that is sequentially and monolithically stacked; a second light-emitting element; and a third light-emitting element; and It includes a first lens provided at the lower part of the first light-emitting element; and Each of the first light-emitting element, the second light-emitting element, and the third light-emitting element has a structure in which a first semiconductor layer of a first conductivity type, an active layer, and a second semiconductor layer of a second conductivity type are sequentially stacked. The first lens above is, A first interference pattern that reflects a first incident light diverging from a first focal point located outside the first lens and entering the first lens to form parallel light, and A display device comprising a second interference pattern that reflects a second incident light diverging from a second focal point located outside the first lens and entering the first lens, thereby creating parallel light.
2. In Article 1, The first lens above is, A display device further comprising a third interference pattern that reflects a third incident light diverging from a third focal point located outside the first lens and entering the first lens to form parallel light.
3. In Article 1, The first lens above is a display device comprising a photopolymer.
4. In Paragraph 3, A display device comprising a photopolymer that reacts to red light, a second monomer that reacts to green light, and a third monomer that reacts to blue light.
5. In Article 1, A display device comprising a holographic lens, wherein the first lens is a holographic lens.
6. In Article 1, A display device having a thickness of 2 μm or more and 10 μm or less of the first lens.
7. In Article 1, A display device further comprising a second lens provided on the third light-emitting element.
8. In Article 7, A display device in which the second lens is configured to reduce the angular distribution of light reflected by the first lens.
9. In Article 1, A display device further comprising a backplane substrate provided below the first lens and including at least one driving element.
10. A third light-emitting element that is sequentially and monolithically stacked; a second light-emitting element; and a first light-emitting element; and It includes a first lens provided on the upper part of the first light-emitting element; and Each of the first light-emitting element, the second light-emitting element, and the third light-emitting element has a structure in which a first semiconductor layer of a first conductivity type, an active layer, and a second semiconductor layer of a second conductivity type are sequentially stacked. The first lens above is, A first interference pattern that diffracts the first incident light diverging from a first focal point located outside the first lens and entering the first lens to form parallel light, and A display device comprising a second interference pattern that diffracts a second incident light, which diverges from a second focal point located outside the first lens and enters the first lens, to form parallel light.
11. In Article 10, The first lens above is, A display device further comprising a third interference pattern that reflects a third incident light diverging from a third focal point located outside the first lens and entering the first lens to form parallel light.
12. In Article 10, The first lens above is a display device comprising a photopolymer.
13. In Article 12, A display device comprising a photopolymer that reacts to red light, a second monomer that reacts to green light, and a third monomer that reacts to blue light.
14. In Article 10, A display device comprising a holographic lens, wherein the first lens is a holographic lens.
15. In Article 10, A display device having a thickness of 2 μm or more and 10 μm or less of the first lens.
16. In Article 10, A display device further comprising a second lens provided on the first lens.
17. In Article 16, A display device in which the second lens is provided to reduce the angular distribution of light diffracted by the first lens.
18. In Article 10, A display device further comprising a backplane substrate provided below the third light-emitting element and including at least one driving element.
19. Step of preparing the lens; A step of forming a first interference pattern that reflects a first incident light diverging from a first focal point located outside the lens and entering the lens to form parallel light; A step of forming a second interference pattern that reflects a second incident light diverging from a second focal point located outside the lens and entering the lens, thereby creating parallel light; A step of attaching the above lens to a backplane substrate; and A method for manufacturing a display device comprising the step of forming a first light-emitting element, a second light-emitting element, and a third light-emitting element that are sequentially monolithically stacked on the lens.
20. In Article 19, A method for manufacturing a display device, further comprising the step of forming a third interference pattern that reflects a third incident light diverging from a third focal point located outside the lens and entering the lens to form parallel light.

Description

Display apparatus and method of manufacturing the display apparatus The present disclosure relates to a display device and a method for manufacturing a display device. In monolithic light sources, light sources can be arranged horizontally or vertically. The horizontal arrangement method involves positioning RGB light sources horizontally; while this allows for a structure that enhances the light extraction efficiency of each RGB source, it is subject to resolution limitations. On the other hand, the vertical stacking method, which is implemented by stacking RGB light sources vertically, has the advantages of no loss in resolution and low driving current density; however, it suffers from a problem where Light Extraction Efficiency (LEE) is reduced due to differences in distance from the lens resulting from the stacking of RGB light sources. Therefore, a manufacturing process for the vertical stacking method with improved light extraction efficiency is required. FIG. 1 is a cross-sectional view showing a display device according to an exemplary embodiment. FIG. 2 is a cross-sectional view showing a display device according to an exemplary embodiment. FIG. 3 is a cross-sectional view showing a display device according to an exemplary embodiment. FIG. 4 is a cross-sectional view showing a display device according to an exemplary embodiment. FIGS. 5a to 5e are drawings illustrating a method for manufacturing a display device according to an exemplary embodiment. FIGS. 6a to 6c are cross-sectional views illustrating a lens manufacturing method according to an exemplary embodiment. FIG. 7 illustrates an example in which a display device according to embodiments is applied to a mobile device. FIG. 8 illustrates an example in which a display device according to embodiments is applied to a vehicle display device. FIG. 9 illustrates an example in which a display device according to embodiments is applied to augmented reality glasses or virtual reality glasses. FIG. 10 illustrates an example in which a display device according to embodiments is applied to signage. FIG. 11 illustrates an example in which a display device according to embodiments is applied to a wearable display. Hereinafter, display devices and methods for manufacturing display devices according to various embodiments will be described in detail with reference to the attached drawings. In the drawings below, the same reference numerals refer to the same components, and the size of each component in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the embodiments described below are merely illustrative, and various modifications are possible from these embodiments. In the following, terms designated as "upper" or "upper" may include not only those directly above in contact but also those above non-contact. Singular expressions include multiple expressions unless the context clearly indicates otherwise. Furthermore, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. The use of the term "for example" and similar descriptive terms may apply to both the singular and the plural. Unless there is an explicit description of the order of the steps constituting the method, these steps may be performed in a suitable order and are not necessarily limited to the described order. The connections of lines or connecting members between the components shown in the drawings are exemplary representations of functional connections and/or physical or circuit connections, and may be replaced or additionally represented as various functional connections, physical connections, or circuit connections in the actual device. All examples or the use of exemplary terms are merely for the purpose of describing technical ideas in detail, and unless limited by the claims, the scope is not limited by such examples or exemplary terms. FIG. 1 is a cross-sectional view showing a display device according to an exemplary embodiment. Referring to FIG. 1, the display device (100) may include a first lens (140) provided on a backplane substrate (10), a first light-emitting element (110), a second light-emitting element (120), and a third light-emitting element (130) sequentially monolithically stacked on the first lens (140). The backplane substrate (10) may include at least one driving element (12). The at least one driving element (12) is intended to electrically drive a first light-emitting element (110), a second light-emitting element (120), and a third light-emitting element (130), and may include, for example, a transistor, a thin-film transistor, or a High Electron Mobility Transistor (HEMT). However, it is not limited thereto, and the driving element (12) may further include a capacitor. The backplane substrate (10) may include electrode pads (14) spaced apart from each other. The electrode pads (14) may be