Color filter, display device and electronic equipment, manufacturing method thereof, and apparatus for manufacturing display device

• US 20030012870A1
• Filed: 05/31/2002
• Published: 01/16/2003
• Est. Priority Date: 06/01/2001
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Sakurada, Kazuaki
• Granted Patent: US 6,933,086 B2
• Time in Patent Office: Days
• US Class Current: 427/68
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays

Abstract

In a manufacturing method of a color filter for display devices having a plurality of pixels on a substrate, each pixel comprises a reflective layer and a color layer, the method of manufacture comprises a step of forming partitions which separate each pixel area from the other pixel areas to comprise the pixel in each pixel area; a step of forming the reflective layer by discharging a first liquid material into each of the pixel areas by means of a droplet discharge method; and a step of forming the color layer within each of the pixel areas. By this method, color filters can be manufactured without requiring photolithography or other complicated processes, in a short time, using little energy, and at low cost.

Claims

1. A manufacturing method of a color filter having a plurality of pixels on a substrate, each pixel comprising a reflective layer and a color layer, said method comprising:

a step of forming partitions which separate each pixel area from the other pixel areas, each pixel area comprising each pixel;

a step of forming said reflective layer by discharging a first liquid material into each of said pixel areas by means of a droplet discharge method; and

,

a step of forming said color layer within each of said pixel areas.

2. The manufacturing method of a color filter according to claim 1,

wherein said step of forming said color layer comprises a step of discharging a second liquid material by means of a droplet discharge method.

3. The manufacturing method of a color filter according to claim 1,

wherein said reflective layer is a semi-transmissive reflective layer having light-transmitting properties.

4. The manufacturing method of a color filter according to claim 1,

wherein said first liquid material comprises a light-scattering material.

5. The manufacturing method of a color filter according to claim 1, further comprising a step of forming a light-scattering layer between said reflective layer and said color layer.

6. The manufacturing method of a color filter according to claim 1,

wherein said partitions, said reflective layer and said color layer are formed integrally on an active matrix substrate.

7. A manufacturing method of a display device by using a color filter manufactured by the method according to claim 1.

9. A manufacturing method of electronic equipment by using a display device manufactured by a method according to claim 7 or claim 8.

8. A manufacturing method of a display device, comprising:

a step of forming a reflective layer by a droplet discharge method; and

,

a step of forming an electroluminescence element on said reflective layer.

10. Apparatus for manufacturing a display device having a reflective layer on a substrate, said apparatus comprising a discharge portion, which discharges a liquid material onto said substrate to form said reflective layer, by means of a droplet discharge method.

11. A color filter having a plurality of pixels on a substrate, each pixel comprising a reflective layer and a color layer,

said color filter comprises partitions which separate each pixel area from the other pixel areas, each pixel area comprising each pixel,

wherein said reflective layer and said color layer of each pixel are isolated from the reflective layers and the color layers of other pixels by said partitions.

12. A display device, comprising the color filter according to claim 11.

13. Electronic equipment, comprising the display device according to claim 12.