INK-JET APPLICATION METHOD AND DISPLAY DEVICE PRODUCING METHOD

• US 20110001784A1
• Filed: 09/15/2010
• Published: 01/06/2011
• Est. Priority Date: 09/24/2004
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Sakurai, Naoaki
• Granted Patent: US 8,419,178 B2
• Time in Patent Office: Days
• US Class Current: 347/102
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

By using an ink-jet application method, a solid content having a desired thickness contained in an application solution is formed in a desired region of a substrate by repeating an applying process and a drying process more than once. In the applying process, the application solution is sprayed and applied on the substrate. In the drying process, the application solution is dried to generate the solid content.

Claims

1. An ink-jet application method comprising steps of:

spraying and applying drops of an application solution in a block surrounded by a bank formed on a substrate; and

drying the applied application solution to generate a solid content contained in the application solution,

wherein the solid content having a desired thickness is formed in the block by repeating the applying step and the drying step more than once.

3. The ink-jet application method according to claim 1, wherein an air-knife nozzle dries the application solution in each drying step.

4. The ink-jet application method according to claim 3, wherein airflow is locally generated by discharging air from a discharge air-knife nozzle and suctioning the air into a suction air-knife nozzle.

5. The ink-jet application method according to claim 1, wherein a shield plate prevents the application solution from drying in each applying step.

6. The ink-jet application method according to claim 1, wherein the applying step and the drying step are repeated until the thickness of the solid content become to be equal to or more than 1 μ

m.

7. The ink-jet application method according to claim 1, wherein the bank has an upper end surface in which an ink-shedding process is carried out.

8. The ink-jet application method according to claim 1, wherein in each applying step after a first applying step, drops of the same application solution as that applied in the first applying step are applied.

9. The ink-jet application method according to claim 1, wherein a final drying step, the solvent contained in the applied application solution is completely volatilized, and in each drying step other than the final drying step, the solvent contained in the applied application solution is not completely volatilized.

10. The ink-jet application method according to claim 1, wherein the solid content is contained in the application solution in concentrations of 20-30%.

2. A display device producing method comprising steps of:

spraying and applying drops of an application solution in a block surrounded by a bank formed on a substrate; and

drying the applied application solution to generate a light shield film,

wherein the light shield film having a desired thickness is formed in the block by repeating the applying step and the drying step more than once.

11. The display device producing method according to claim 2, wherein an air-knife nozzle dries the application solution in each drying step.

12. The display device producing method according to claim 11, wherein airflow is locally generated by discharging air from a discharge air-knife nozzle and suctioning the air into a suction air-knife nozzle.

13. The display device producing method according to claim 2, wherein a shield plate prevents the application solution from drying in each applying step.

14. The display device producing method according to claim 2, wherein the applying step and the drying step are repeated until the thickness of the solid content become to be equal to or more than 1 μ

m.

15. The display device producing method according to claim 2, wherein the bank has an upper end surface in which an ink-shedding process is carried out.

16. The display device producing method according to claim 2, wherein in each applying step after a first applying step, drops of the same application solution as the applied in the first applying step are applied.

17. The display device producing method according to claim 2, wherein in a final drying step, the solvent contained in the applied application solution is completely volatilized, and

in each drying step other than the final drying step, the solvent contained in the applied application solution is not completely volatilized.

18. The display device producing method according to claim 2, wherein the solid content is contained in the application solution in concentrations of 20-30%