KR-20260065725-A - Display device, method for manufacturing of the display device and electronic device including the display device

Abstract

The present invention relates to a display device, a method for manufacturing a display device, and an electronic device including a display device. One aspect of the present invention comprises a substrate, a pixel electrode disposed on the substrate, and a pixel defining film including a trench portion formed by being drawn in toward the pixel electrode, wherein the pixel defining film includes an opening that exposes a central portion of the pixel electrode. The pixel defining film may include a first pixel defining film adjacent to the opening and a second pixel defining film spaced apart from the first pixel defining film.

Inventors

• 이영호
• 이준희
• 이진수
• 임충열
• 장은제
• 최범락
• 황성용

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260511

Application Date

20250605

Priority Date

20241101

Claims (20)

1. Substrate; A pixel electrode disposed on the above substrate; and A pixel defining film comprising: an opening that exposes the central portion of the pixel electrode, and a trench portion formed by being drawn in toward the pixel electrode; The above pixel definition film is, A first pixel defining film adjacent to the above-mentioned opening; and A display device comprising: a second pixel defining film spaced apart from the first pixel defining film.
2. In paragraph 1, The above pixel definition film is, A display device that is a black pixel defining film.
3. In paragraph 1, The above trench section is, A display device formed to expose at least a portion of the pixel electrode.
4. In paragraph 1, The pixel electrode above is, A display device arranged to overlap with the entire area of the first pixel definition film.
5. In paragraph 1, The above-mentioned first pixel defining film is, A display device formed with a shape in which the width narrows as it moves away from the pixel electrode.
6. In paragraph 1, The above-mentioned first pixel defining film is, A display device in which the angle of inclination of the part adjacent to the opening is greater than the angle of inclination of the part adjacent to the trench.
7. In paragraph 1, The above-mentioned first pixel defining film is, A display device having an inclination angle of 11° to 45° between the above trench section and the adjacent section.
8. In paragraph 1, The pixel electrode above is, A display device arranged to overlap at least a portion of the second pixel defining film.
9. In paragraph 1, The first pixel defining film and the second pixel defining film are, A display device spaced apart by a distance of 2.0 μm to 2.2 μm.
10. In paragraph 1, A display device further comprising: an anti-reflection member disposed on the pixel definition film so as to overlap with at least a portion of the trench portion.
11. Substrate; A pixel electrode disposed on the above substrate; A pixel defining film comprising an opening that exposes the central portion of the pixel electrode and a trench portion formed by being drawn in toward the pixel electrode; and A display device comprising a capping layer disposed on the above trench portion.
12. In Paragraph 11, The above capping layer is, A display device formed of a material different from the pixel defining film above.
13. In Paragraph 11, The above trench section is, A display device formed to expose at least a portion of the pixel electrode.
14. In Paragraph 13, The above capping layer is, A display device formed to cover an exposed area of the pixel electrode.
15. In Paragraph 11, The above pixel definition film is, A first pixel defining film adjacent to the above-mentioned opening; and A display device comprising: a second pixel defining film spaced apart from the first pixel defining film.
16. In paragraph 15, The above capping layer is, A display device positioned so as not to cover the uppermost part of the first pixel definition film.
17. In paragraph 15, The above capping layer is, A display device positioned to cover the uppermost part of the second pixel definition film.
18. In paragraph 15, The above capping layer is, A display device that overlaps the first pixel defining film by more than 0 μm and 2.0 μm.
19. In Paragraph 11, The thickness from the pixel electrode to the bottom of the capping layer is, A display device having a diameter of 0.4 μm to 0.8 μm.
20. In Paragraph 11, A display device further comprising: an anti-reflection member disposed on the pixel definition film so as to overlap with at least a portion of the trench portion.

Description

Display device, method for manufacturing of the display device and electronic device including the display device The present invention relates to a display device, a method for manufacturing a display device, and an electronic device including a display device. As the demand for display devices expands, the need for display devices capable of various applications is also increasing. Following this trend, display devices are becoming increasingly larger or thinner, and there is a growing need for display devices that provide accurate and vivid colors while offering larger and thinner forms. FIG. 1 is a schematic perspective view illustrating a display device according to one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view illustrating an example of the I-I' section of FIG. 1. FIG. 3 is a schematic plan view illustrating a part of the display device of FIG. 1. Figure 4 is a circuit diagram illustrating an example of a pixel of the display device of Figure 1. Figure 5 is a cross-sectional view schematically illustrating an example of a cross-section of a pixel of Figure 3. Figure 6 is an enlarged view of section X of Figure 5. FIG. 7a is a photograph of a pixel defining film according to one embodiment of the present invention. FIG. 7b is a schematic cross-sectional view illustrating an example of the IV-IV' section of FIG. 7a. FIG. 7d is a schematic cross-sectional view illustrating an example of the V-V' section of FIG. 7a. FIG. 8a is a schematic diagram illustrating one embodiment of a photomask used to form the pixel defining film of FIG. 7a to 7c. FIG. 8b is a schematic diagram illustrating another embodiment of a photomask used to form the pixel defining film of FIG. 7a to 7c. FIG. 8c is a schematic diagram illustrating a pixel defining film formed by the photomask of FIG. 8a. FIG. 8d is a schematic diagram illustrating a pixel defining film formed by the photomask of FIG. 8b. FIG. 8e is a diagram illustrating diffraction and light scattering in the light-emitting region according to whether a trench is formed and the shape of the opening by the pixel definition film. FIG. 8f is a diagram showing the distance between adjacent trench sections according to one embodiment of the present invention. FIG. 8g is a drawing showing the removal of the second pixel definition film existing between adjacent trench sections in FIG. 8f. FIG. 8i is a drawing showing that a second pixel defining film does not exist between adjacent trench sections according to one embodiment of the present invention. FIG. 8i is a drawing showing a trench section and a transparent opening according to one embodiment of the present invention. FIG. 8j is a cross-sectional view illustrating an example of the VI-VI' section of FIG. 8i. FIG. 8k is a drawing showing the removal of the second pixel defining film existing between the trench portion and the transparent aperture in FIG. 8i. FIG. 81 is a drawing showing that a second pixel defining film does not exist between the transparent opening and the trench portion according to one embodiment of the present invention. FIG. 8m is a drawing showing the removal of the second pixel definition film adjacent to the transparent opening in FIG. 8l. FIG. 8n is another drawing showing the removal of the second pixel defining film adjacent to the transparent opening in FIG. 8l. FIG. 9 is a diagram for explaining the process of forming the pixel definition film of FIG. 7a to 7c. FIG. 10a is a drawing for explaining a pixel defining film having a capping layer formed thereon according to another embodiment of the present invention. FIG. 10b is another drawing for explaining a pixel defining film having a capping layer formed thereon according to another embodiment of the present invention. FIG. 10c is a schematic diagram illustrating one embodiment of a photomask used to form the capping layer of FIG. 10a or FIG. 10b. FIG. 10d is a drawing for explaining the process of forming the capping layer of FIG. 10a or FIG. 10b. FIG. 11a is a drawing for explaining a pixel defining film having a separator formed thereon according to another embodiment of the present invention. FIG. 11b is a schematic diagram illustrating the process of forming a separator on a pixel defining film according to an embodiment of the present invention. FIG. 11c is a photograph of a separator formed on a pixel defining film according to an embodiment of the present invention. FIG. 12 is a diagram illustrating the reflection path of light in a display device according to the present invention. Figures 13a and 13b are photographs illustrating the improvement effect of optical properties according to Figure 12. FIG. 14a is a drawing showing an embodiment of a display device with the anti-reflection member removed according to the present invention. FIG. 14b is a drawing showing another embodiment of a display device with the anti-reflection member removed according to the present invention. FIG. 14c is a d