KR-20260065678-A - display device and electronic device

Abstract

A display device according to one embodiment comprises a substrate and a first light-emitting diode unit, a second light-emitting diode unit, and a third light-emitting diode unit positioned on the substrate, wherein the first light-emitting diode unit comprises at least one first light-emitting diode that emits light of a first color light, the second light-emitting diode unit comprises at least one second light-emitting diode that emits light of a second color light different from the first color light, and the third light-emitting diode unit comprises at least one third light-emitting diode that emits light of a third color light different from the first color light and the second color light, and the planar size of the third light-emitting diode is larger than the planar size of the first light-emitting diode and the planar size of the second light-emitting diode.

Inventors

• 이종원
• 강재웅
• 장진혁

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260511

Application Date

20241101

Claims (20)

1. Substrate, and It includes a first light-emitting diode unit, a second light-emitting diode unit, and a third light-emitting diode unit located on the substrate, The above-mentioned first light-emitting diode unit includes at least one first light-emitting diode that emits light of a first color, and The second light-emitting diode unit comprises at least one second light-emitting diode that emits light of a second color different from the first color light, and The above third light-emitting diode unit includes at least one third light-emitting diode that emits a third light different from the first light and the second light, and The planar size of the third light-emitting diode is larger than the planar size of the first light-emitting diode and the planar size of the second light-emitting diode. Display device.
2. In paragraph 1, A display device in which the shortest planar width of the third light-emitting diode is greater than the shortest planar width of the first light-emitting diode and the shortest planar width of the second light-emitting diode.
3. In paragraph 2, A display device in which the shortest width of the third light-emitting diode is greater than or equal to a specific size, and at least one of the shortest width of the first light-emitting diode and the shortest width of the second light-emitting diode is less than the specific size.
4. In Paragraph 3, The above specific size is a display device located within the range of 3 micrometers to 5 micrometers.
5. In Paragraph 4, A display device in which the shortest width of the third light-emitting diode is less than 10 micrometers.
6. In paragraph 5, A display device in which at least one of the number of first light-emitting diodes included in the first light-emitting diode unit and the number of second light-emitting diodes included in the second light-emitting diode unit is greater than the number of third light-emitting diodes included in the third light-emitting diode unit.
7. In paragraph 1, A display device further comprising a driving circuit portion located between each of the first light-emitting diode unit, the second light-emitting diode unit, and the third light-emitting diode unit and the substrate.
8. In Paragraph 7, The pixel circuit further comprises a first electrode electrically connected to at least one of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode. The pixel circuit described above includes a plurality of transistors Display device.
9. In paragraph 8, The above driving circuit is a display device including the above pixel circuit.
10. In paragraph 8, The pixel circuit portion is a display device located between the substrate and the driving circuit portion.
11. In paragraph 1, A display device in which at least one of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode has a planar shape that is circular or rectangular.
12. Substrate, and It includes a first light-emitting diode unit and a second light-emitting diode unit located on the substrate, The first light-emitting diode unit comprises at least one green light-emitting diode, and The second light-emitting diode unit comprises at least one blue light-emitting diode, and The shortest planar width of the second light-emitting diode is 3 micrometers or more, and The shortest planar width of the first light-emitting diode is less than 3 micrometers. Display device.
13. In Paragraph 12, A display device in which the shortest width of the first light-emitting diode is less than 10 micrometers.
14. In Paragraph 13, A display device in which the number of first light-emitting diodes included in the first light-emitting diode unit is greater than the number of second light-emitting diodes included in the second light-emitting diode unit.
15. In Paragraph 12, A display device further comprising a driving circuit portion located between each of the first light-emitting diode unit and the second light-emitting diode unit and the substrate.
16. In Paragraph 15, The pixel circuit further comprises at least one first electrode of the first light-emitting diode and the second light-emitting diode and is electrically connected to the first electrode. The pixel circuit described above includes a plurality of transistors Display device.
17. In Paragraph 16, The above driving circuit is a display device including the above pixel circuit.
18. In Paragraph 16, The pixel circuit portion is a display device located between the substrate and the driving circuit portion.
19. Substrate, and It includes a first light-emitting diode unit, a second light-emitting diode unit, and a third light-emitting diode unit located on the substrate, The above-mentioned first light-emitting diode unit includes at least one first light-emitting diode that emits light of a first color, and The second light-emitting diode unit comprises at least one second light-emitting diode that emits light of a second color different from the first color light, and The above third light-emitting diode unit includes at least one third light-emitting diode that emits light of the first color light, and The planar size of the first light-emitting diode is larger than the planar size of the second light-emitting diode. Display device.
20. In Paragraph 19, A display device further comprising a color conversion layer located above the third light-emitting diode and including a semiconductor nanocrystal.

Description

Display device and electronic device The present disclosure relates to a display device and an electronic device. A display device includes a plurality of pixels, which are units for displaying images. Each pixel may include a pixel circuit and a light-emitting part connected thereto. The light-emitting part can be implemented in various forms, for example, by including a light-emitting diode as a light-emitting element. Light-emitting diodes can have various sizes, and recently, micro- or nano-scale ultra-small light-emitting diodes using II-VI or III-V compound semiconductors are being developed. Light-emitting diodes can be formed directly on a substrate containing a display device or mounted on a substrate in the form of a chip. Light-emitting diodes can emit light of one of several primary colors. A pixel circuit for driving a light-emitting diode may be integrated on a substrate or included in a light-emitting diode chip. The pixel circuit may include a plurality of transistors and at least one capacitor. The pixel circuit controls the amount of driving current delivered to the light-emitting diode so that each pixel can emit light of a desired brightness. FIG. 1 is a block diagram of a display device according to one embodiment. FIG. 2 is a plan view of a display portion of a display device according to one embodiment. Figure 3 is a graph showing the external quantum efficiency according to the planar size of the light-emitting diode. Figure 4 is a graph showing the external quantum efficiency peak values according to the planar size of the light-emitting diode. Figure 5 is a graph showing the external quantum efficiency according to the planar size of red, green, and blue light-emitting diodes. Figure 6 is a graph showing the luminance according to the planar size of red, green, and blue light-emitting diodes. Figure 7 is a graph showing the change in normalized external quantum efficiency over time of red, green, and blue light-emitting diodes of various planar sizes. Figure 8 is a graph showing the change in normalized external quantum efficiency over time of red, green, and blue light-emitting diodes of various planar sizes. FIGS. 9, FIGS. 10, and FIGS. 11 are each plan views of a display portion of a display device according to one embodiment. FIG. 12 is a perspective view showing a cross- section of a light-emitting diode according to one embodiment. FIG. 13 is a circuit diagram of a pixel of a display device according to one embodiment. FIG. 14 is a perspective view of a light-emitting diode unit of a display device according to one embodiment. FIGS. 15, FIGS. 16, and FIGS. 17 are cross-sectional views of a display device according to one embodiment, respectively. FIG. 18 illustrates an example in which a display device according to one embodiment is applied to a mobile device. FIG. 19 illustrates an example in which a display device according to one embodiment is applied to a vehicle display device. FIG. 20 illustrates an example in which a display device according to one embodiment is applied to augmented reality glasses or virtual reality glasses. FIG. 21 illustrates an example in which a display device according to one embodiment is applied to a wearable display device. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components b