DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20190319218A1
• Filed: 09/28/2017
• Published: 10/17/2019
• Est. Priority Date: 09/28/2017
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: TAKAHASHI, Jumpei, SONODA, Tohru, MIYAMOTO, Yoshinobu
• Application Number:
  US16/473,274
• Publication Number:
  US 20190319218A1
• Time in Patent Office: Days
• CPC Class Codes: G09F 9/30 in which the desired character or characters are formed by combining individual elements panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour

Abstract

In a sealing film in which a first inorganic film, an organic film, and a second inorganic film are layered in that order, a high-wettability region having a relatively high wettability with respect to droplets configured to become the organic film, and a low-wettability region having a relatively low wettability with respect to the droplets, are arranged in an alternating manner on an organic film side surface of the first inorganic film.

Claims

1. A display device comprising:

a base substrate in which a display region, in which an image is displayed, and a frame region located in the periphery of the display region are defined;

a light emitting element provided in the display region of the base substrate; and

a sealing film in which a first inorganic film, an organic film, and a second inorganic film are layered in that order, the sealing film being provided in the display region and the frame region, the sealing film covering the light emitting element,

wherein a high-wettability region having a relatively high wettability with respect to droplets configured to become the organic film, and a low-wettability region having a relatively low wettability with respect to the droplets, are arranged in an alternating manner on an organic film side surface of the first inorganic film.

2. The display device according to claim 1,

wherein the high-wettability region is formed by irradiation with ultraviolet light.

3. The display device according to claim 1,

wherein another inorganic film that is different from the first inorganic film is provided in the high-wettability region.

4. The display device according to claim 1,

wherein a damming wall that contacts a circumferential end part of the sealing film is provided in the frame region, the damming wall surrounding the light emitting element, and

the high-wettability region and the low-wettability region are arranged in an alternating manner on an inner side of the damming wall.

5. The display device according to claim 4,

wherein a surface of the first inorganic film provided above the damming wall has the same wettability as the low-wettability region with respect to the droplets configured to become the organic film.

6. The display device according to claim 1,

wherein a damming wall that contacts a circumferential end part of the sealing film is provided in the frame region, the damming wall surrounding the light emitting element, and

a surface of the first inorganic film provided above the damming wall has the same wettability as the low-wettability region with respect to the droplets configured to become the organic film.

7. The display device according to claim 6,

wherein a surface of the first inorganic film provided in the display region is irradiated with ultraviolet light.

8. The display device according to claim 6,

wherein another inorganic film that is different from the first inorganic film is provided on a surface of the first inorganic film provided in the display region.

10. The display device according to claim 1,

wherein the light emitting element is an organic EL element.

9. (canceled)

11. A method of manufacturing a display device, the method comprising:

forming a light emitting element on a base substrate; and

forming a sealing film covering the light emitting element,

wherein the forming of the sealing film includes

forming a first inorganic film covering the light emitting element,

forming an organic film by applying an organic film upon the first inorganic film, and

forming a second inorganic film covering the organic film, and

in the forming of the first inorganic film, a high-wettability region having a relatively high wettability with respect to droplets configured to become the organic film, and a low-wettability region having a relatively low wettability with respect to the droplets, are formed on the first inorganic film alternately along a direction in which the organic film is applied in the forming of the organic film.

12. The method of manufacturing a display device according to claim 11,

wherein in the forming of the first inorganic film, the high-wettability region and the low-wettability region are formed orthogonal to the direction in which the organic film is applied in the forming of the organic film.

13. The method of manufacturing a display device according to claim 11,

wherein in the forming of the first inorganic film, the high-wettability region is formed by irradiating a surface of the first inorganic film with ultraviolet light.

14. The method of manufacturing a display device according to claim 13,

wherein a damming wall is provided on the base substrate, the damming wall surrounding the light emitting element, and

in the forming of the first inorganic film, a surface of the first inorganic film above the damming wall is not irradiated with the ultraviolet light.

15. The method of manufacturing a display device according to claim 11,

wherein the light emitting element is an organic EL element.