KR-20260066886-A - DISPLAY DEVICE

Abstract

A display device according to embodiments of the present disclosure may provide a substrate having a display area including an optical area through which light is transmitted and a general area outside the optical area; a first anode pad and a first cathode pad located in the general area; a first light-emitting element located in the general area and including a first anode electrode electrically connected to the first anode pad and a first cathode electrode electrically connected to the first cathode pad; a second anode pad and a second cathode pad located in the optical area; a second light-emitting element located in the optical area and including a second anode electrode electrically connected to the second anode pad and a second cathode electrode electrically connected to the second cathode pad; and a first dummy anode pad and a first dummy cathode pad located in the optical area and disposed adjacent to the second anode pad and the second cathode pad, to which the light-emitting element is not connected.

Inventors

• 송태준
• 김철호

Assignees

• 엘지디스플레이 주식회사

Dates

Publication Date

20260512

Application Date

20241105

Claims (20)

1. A substrate having a display area including an optical region through which light is transmitted and a general region outside the optical region; A first anode pad and a first cathode pad located in the above general area; A first light-emitting element located in the above general area and comprising a first anode electrode electrically connected to the first anode pad and a first cathode electrode electrically connected to the first cathode pad; A second anode pad and a second cathode pad located in the above optical region; A second light-emitting element located in the optical region and comprising a second anode electrode electrically connected to the second anode pad and a second cathode electrode electrically connected to the second cathode pad; and A display device comprising a first dummy anode pad and a first dummy cathode pad, which are located in the optical region and are positioned adjacent to the second anode pad and the second cathode pad, and to which a light-emitting element is not connected.
2. In paragraph 1, A display device further comprising a second dummy anode pad and a second dummy cathode pad located in the optical region and disposed adjacent to the second anode pad and the second cathode pad, to which a light-emitting element is not connected.
3. In paragraph 2, The above optical region includes a common redundancy region, and The second anode pad, the second cathode pad, the first dummy anode pad, the first dummy cathode pad, the second dummy anode pad, and the second dummy cathode pad are, It is located at an equal distance from the center of the above common redundancy area, and The second anode pad and the second cathode pad are located in opposite directions relative to the center, and The first dummy anode pad and the first dummy cathode pad are located in opposite directions relative to the center, and A display device in which the second dummy anode pad and the second dummy cathode pad are located in opposite directions relative to the center.
4. In paragraph 3, The second anode pad and the second cathode pad are spaced apart in a first direction, and The first dummy anode pad and the first dummy cathode pad are spaced apart in a second direction, and The second dummy anode pad and the second dummy cathode pad are spaced apart in a third direction, and A display device in which the first direction, the second direction, and the third direction are different directions.
5. In paragraph 4 The first anode pad and the first cathode pad are spaced apart in a predetermined reference direction, and A display device in which two or more of the first direction, the second direction, and the third direction are different from the reference direction.
6. In paragraph 3, The above optical region includes a plurality of pixel regions, and Each of the above plurality of pixel regions includes a first region, a second region, a third region, and a fourth region, and The plurality of pixel regions includes a first pixel region comprising the second light-emitting element and a second pixel region adjacent to the first pixel region. In the above first pixel area, A light-emitting element is not placed in the first region above, and A light-emitting element that emits second color light is disposed in the second region above, and A light-emitting element that emits a third color light is disposed in the above third region, and The second light-emitting element emitting a first color light is disposed in the fourth region, and In the above second pixel area, A light-emitting element that emits the first color light is disposed in the first region, and A light-emitting element that emits the second color light is disposed in the second region, and A light-emitting element that emits the third color light is disposed in the third region, and A display device in which a light-emitting element is not placed in the above-mentioned fourth region.
7. In paragraph 1, An optical bezel area between the optical area and the general area; A first subpixel circuit disposed in the above general area and configured to drive the first light-emitting element; and A display device further comprising a second subpixel circuit disposed in the optical bezel area and configured to drive the second light-emitting element.
8. In Paragraph 7, A common wiring disposed in the optical bezel area and to which a cathode voltage is applied; A first connecting wire electrically connecting the second anode electrode of the second light-emitting element of the optical region and the second subpixel circuit; and A display device comprising a second connecting wire that electrically connects the second cathode electrode of the second light-emitting element of the optical region and the common wiring.
9. In paragraph 8, A display device wherein the first connecting wire and the second connecting wire comprise a transparent conductive material.
10. In paragraph 8, It further comprises a planarization layer disposed on the substrate and disposed on the side of the first light-emitting element, having an opening, and The second light-emitting element is a display device located within the opening.
11. In Paragraph 10, The above second connecting wiring is, Lower wiring electrically connected to the above second cathode pad; and It includes upper wiring electrically connected to the lower wiring mentioned above, and A display device in which the upper wiring is electrically connected to the lower wiring through the contact hole of the flattening layer.
12. In paragraph 1, A display device in which the second light-emitting element is a chip of a different form from the first light-emitting element.
13. In Paragraph 12, The second light-emitting element is a flip-type chip, and the first light-emitting element is one of a lateral-type chip and a vertical-type chip, or A display device in which the second light-emitting element is a lateral type chip, and the first light-emitting element is one of a flip type chip and a vertical type chip.
14. In paragraph 1, A display device in which the second light-emitting element is a chip of the same shape as the first light-emitting element.
15. In Paragraph 14, A display device in which both the first light-emitting element and the second light-emitting element are flip-type chips or lateral-type chips.
16. A first main area comprising a first color main pad set equipped with a first color main anode pad and a first color main cathode pad; A first main light-emitting element electrically connected to the first color main pad set above; A second main area comprising a second color main pad set equipped with a second color main anode pad and a second color main cathode pad; A second main light-emitting element electrically connected to the second color main pad set above; A third color main pad set equipped with a third color main anode pad and a third color main cathode pad; A third main light-emitting element electrically connected to the above third color main pad set; and A common pad region adjacent to the first to third main light-emitting elements; is included, The above common pad area is, A first redundancy pad set equipped with a first color redundancy anode pad and a first color redundancy cathode pad; A second redundancy pad set equipped with a second color redundancy anode pad and a second color redundancy cathode pad; and It includes a third redundancy pad set equipped with a third color redundancy anode pad and a third color redundancy cathode pad, and A display device in which the first redundancy pad set, the second redundancy pad set, and the third redundancy pad set are in a state where the light-emitting element is not connected.
17. In Paragraph 16, The first color redundancy anode pad, the first color redundancy cathode pad, the second color redundancy anode pad, the second color redundancy cathode pad, the third color redundancy anode pad, and the third color redundancy cathode pad are, It is located at an equal distance from the center of the above common pad area, and The first color redundancy anode pad and the first color redundancy cathode pad are located in opposite directions relative to the center, and The second color redundancy anode pad and the second color redundancy cathode pad are located in opposite directions relative to the center, A display device in which the third color redundancy anode pad and the third color redundancy cathode pad are located in opposite directions relative to the center.
18. In Paragraph 16, The first color redundancy anode pad and the first color redundancy cathode pad are spaced apart in a first direction, and The second color redundancy anode pad and the second color redundancy cathode pad are spaced apart in a second direction, and The third color redundancy anode pad and the third color redundancy cathode pad are spaced apart in a third direction, and A display device in which the first direction, the second direction, and the third direction are different directions.
19. In Paragraph 18, The first color redundancy anode pad and the first color redundancy cathode pad are spaced apart in a predetermined reference direction, and A display device in which two or more of the first direction, the second direction, and the third direction are different from the reference direction.
20. In Paragraph 16, A display device further comprising connecting wiring that electrically connects the first color main pad set, the second color main pad set, and the third color main pad set with the first redundancy pad set, the second redundancy pad set, and the third redundancy pad set.

Description

Display Device Embodiments of the present disclosure relate to a display device including a redundancy structure. Display devices with self-emissive elements can be implemented thinner than display devices with embedded light sources, and have the advantage of being flexible and foldable. Display devices with self-emissive elements may include organic light-emitting display devices that include organic materials as the light-emitting layer, and micro LED display devices that use micro LED elements as light-emitting elements. Recently, research and development on micro-light emitting display devices using micro-sized micro light emitting diodes as light-emitting elements have been underway, but direct-emissive displays using micro LEDs require a transfer process to place multiple micro LEDs onto a substrate (or panel). However, it is very difficult to transfer micro LEDs with very small sizes (e.g., 100 micrometers or less) onto a substrate. Consequently, there is increasing interest in repair devices and processes (methods) capable of repairing substrates containing defective micro LEDs. Conventional devices and methods for repairing defective micro LEDs are inefficient and have the problem of consuming a lot of time. FIG. 1 shows a display device according to embodiments of the present disclosure. FIG. 2 is a system configuration diagram of a display device according to embodiments of the present disclosure. FIG. 3 is a schematic diagram of a display panel according to embodiments of the present disclosure. FIG. 4 schematically illustrates an optical region and a general region around it in a display panel according to embodiments of the present disclosure. FIGS. 5 and 6 show light-emitting elements disposed in a general area, an optical bezel area, and an optical area in a display panel according to embodiments of the present disclosure, and pixel circuits for driving the light-emitting elements. FIG. 7 shows the pixel arrangement in the general area and optical bezel area of a display panel according to embodiments of the present disclosure. FIG. 8 shows the pixel arrangement in the optical area of a display panel according to embodiments of the present disclosure. FIG. 9 is a cross-sectional view schematically showing the structure of a light-emitting element according to embodiments of the present disclosure. FIGS. 10 to 13 are drawings exemplarily illustrating a repair process of a redundancy light-emitting element in a general area and an optical bezel area according to embodiments of the present disclosure. FIGS. 14 to 17 are drawings illustrating an exemplary repair process of a redundancy light-emitting element in an optical region according to embodiments of the present disclosure. FIG. 18 is a plan view showing the connection structure of a display panel according to embodiments of the present disclosure. FIG. 19 is a detailed plan view showing the connection structure of area A of FIG. 18 according to embodiments of the present disclosure. FIG. 20 is a cross-sectional view taken along the YY' cut line of FIG. 19 according to embodiments of the present disclosure. FIG. 21 is a cross-sectional view taken along the XX' cut line of FIG. 18 according to embodiments of the present disclosure. FIG. 22 is a plan view showing the connection structure of a display panel according to embodiments of the present disclosure. FIG. 23 is a cross-sectional view taken along the ZZ' cut line of FIG. 22 according to embodiments of the present disclosure. FIGS. 24 and 25 are plan views showing a connection structure of a display panel according to embodiments of the present disclosure. Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, the same components may have the same reference numeral as much as possible, even if they are shown in different drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known components or functions may obscure the essence of the present disclosure, such detailed description may be omitted. Where terms such as "comprising," "having," or "consisting of" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it may include a plural unless there is a special explicit description otherwise. Additionally, terms such as first, second, A, B, (a), (b), etc., may be used to describe the components of the present disclosure. These terms are used merely to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by such terms. In describing the positional relationship of components, where it is stated that two or more components are "connected," "combined," or "joined," it should be understood that while the two or more components may be directly "conn