Method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-12514060-B2
Application number	US-202217726978-A
Country	US
Kind code	B2
Filing date	Apr 22, 2022
Priority date	Jul 12, 2021
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A method of manufacturing a display device, which is provided using an inkjet apparatus that provides a liquid composition including a scatterer, includes performing j scanning stages to provide a first composition to i unit display areas among n unit display areas (j is a natural number equal to or greater than 2), and performing a first compensation-scanning stage to provide the first composition to first to (i−1)-th unit display areas among the n unit display areas. The i unit areas of the first head unit provide the first composition to the first unit display area to an i-th unit display area among the n unit display areas in a first scanning stage among the j scanning stages. The first head unit is shifted in the second direction by one unit display area in every scanning stage of the j scanning stages.

First claim

What is claimed is:

1 . A method of manufacturing a display device using an inkjet apparatus which provides a liquid composition comprising a scatterer, the display device comprising a display substrate comprising n unit display areas extending in a first direction and arranged in a second direction crossing the first direction, and the inkjet apparatus comprising a first head unit comprising i unit areas, each of which corresponds to one unit display area, wherein n is a natural number equal to or greater than 12, and i is a natural number equal to or greater than 2, the method comprising:
performing j scanning stages to provide a first composition to i unit display areas among then unit display areas, wherein j is a natural number equal to or greater than 2; and
performing a first compensation-scanning stage to provide the first composition to first to (i−1)-th unit display areas among the n unit display areas,
wherein the i unit areas of the first head unit provide the first composition to the first unit display area to an i-th unit display area among the n unit display areas in a first scanning stage among the j scanning stages, and
the first head unit is shifted in the second direction by one unit display area in every scanning stage of the j scanning stages.

2 . The method of claim 1 , wherein
the first compensation-scanning stage comprises a plurality of compensation-scanning stages, and the compensation-scanning stages of the first compensation-scanning stage comprises a beginning compensation-scanning stage in which (i−1) unit areas among the i unit areas of the first head unit provide the first composition to the first to (i−1)-th unit display areas among the n unit display areas.

3 . The method of claim 2 , wherein the first head unit is shifted in a direction opposite to the second direction by the one unit display area in every compensation-scanning stage of the compensation-scanning stages.

4 . The method of claim 1 , wherein the unit areas, which do not overlap the first to (i−1)-th unit display areas, among the i unit areas of the first head unit do not provide the first composition in the first compensation-scanning stage.

5 . The method of claim 1 , further comprising:
performing a second compensation-scanning stage to provide the first composition to (n−(i−2))-th to n-th unit display areas among the n unit display areas.

6 . The method of claim 5 , wherein the second compensation-scanning stage is consecutively performed following a j-th scanning stage among the j scanning stages.

7 . The method of claim 5 , wherein
the second compensation-scanning stage comprises a plurality of compensation-scanning stages, and the compensation-scanning stages of the second compensation-scanning stage comprises a beginning compensation-scanning stage in which i−1 unit areas among the i unit areas of the first head unit provide the first composition to the (n−(i−2))-th to n-th unit display areas among the n unit display areas.

8 . The method of claim 7 , wherein the first head unit is shifted in the second direction by the one unit display area in every compensation-scanning stage of the compensation-scanning stages.

9 . The method of claim 1 , wherein
the inkjet apparatus further comprises a second head unit comprising i unit areas, and the second head unit provides a second composition different from the first composition to the i unit display areas.

10 . The method of claim 1 , further comprising:
allowing the first head unit to provide the first composition to an outside of the display substrate before the j scanning stages.

11 . The method of claim 1 , wherein
the inkjet apparatus further comprises a tank which stores the first composition, and the first composition stored in the tank is circulated through an external path by a pump.

12 . The method of claim 1 , wherein
the inkjet apparatus further comprises a tank which stores the first composition, and the first composition stored in the tank is circulated inside the tank by a stirrer.

13 . A method of manufacturing a display device using an inkjet apparatus that provides a liquid composition comprising a resin composition and particles dispersed in the resin composition, the display device comprising a display substrate comprising n unit display areas extending in a first direction and arranged in a second direction crossing the first direction, the inkjet apparatus comprising a first head unit and a second head unit spaced apart from the first head unit in the second direction, and each of the first and second head units comprising i unit areas each of which corresponds to one unit display area, wherein n is a natural number equal to or greater than 12, and i is a natural number equal to or greater than 2, the method comprising:
performing j scanning stages to provide a first composition to i unit display areas among the n unit display areas, wherein j is a natural number equal to or greater than 2; and performing a first compensation-scanning stage to provide the first composition to first to (i−1)-th unit display areas among the n unit display areas, wherein the i unit areas of the first head unit provide the first composition to the first unit display area to an i-th unit display area among the n unit display areas in a first scanning stage among the j scanning stages, the first head unit and the second head unit are shifted in the second direction by one unit display area in every scanning stage of the j scanning stages, and the first composition is provided using the first head unit or the second head unit in the first compensation-scanning stage.

14 . The method of claim 13 , wherein
the inkjet apparatus further comprises a third head unit disposed between the first head unit and the second head unit, the third head unit comprises i unit areas, and the third head unit provides a second composition different from the first composition to the i unit display areas.

15 . The method of claim 13 , wherein
the first head unit and the second head unit are spaced apart from each other by k unit display areas in the second direction, wherein k is a natural number equal to or greater than 2, and the first head unit and the second head unit are shifted in the second direction by (i+k+1) unit display areas after the first head unit and the second head unit are scanned by j times.

16 . The method of claim 15 , wherein
j is equal to 3i, and k is equal to 2i.

17 . The method of claim 13 , further comprising
performing a second compensation-scanning stage to provide the first composition to (n−(i−2))-th to n-th unit display areas among the n unit display areas, wherein the first composition is provided using the first head unit or the second head unit in the second compensation-scanning stage.

18 . The method of claim 17 , wherein the first compensation-scanning stage is performed using the first or second head unit which is used in the second compensation-scanning stage.

19 . The method of claim 17 , wherein
the second compensation-scanning stage comprises a plurality of compensation-scanning stages, and the compensation-scanning stages of the second compensation-scanning stage comprises a beginning compensation-scanning stage in which (i−1 unit areas among the i unit areas of the first head unit or the second head unit provide the first composition to the (n−(i−2))-th to n-th unit display areas among the n unit display areas.

20 . The method of claim 19 , wherein the first head

Assignees

• Samsung Display Co Ltd

Inventors

• Han Kang Soo
• Kim Kanguk
• Lee Dongjun
• Lee Songee
• Hwang Sangyeon

Classifications

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K71/135

  using ink-jet printing · CPC title

• B41J2/17596

  Ink pumps, ink valves · CPC title

• B41J29/393

  Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns} · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title