Liquid Crystal Display Device, Manufacturing Method Thereof, and Color Filter Substrate

• US 20090021675A1
• Filed: 06/30/2008
• Published: 01/22/2009
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: KISHIOKA, Atsushi, Sekiguchi, Shinji
• Granted Patent: US 8,094,269 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 2201/50 Protective arrangements

Abstract

In a transflective liquid crystal panel having an in-cell retarder, for improving a layer structure of poor adhesion, an alignment film for the retardation layer is not applied to a portion of disposing a sealing material at the main surface of a substrate of the liquid crystal panel in the step of applying the alignment film to the main surface.

Claims

1. A liquid crystal display device having liquid crystals put between a first substrate and a second substrate, and having a reflective display section for conducing display by a reflection light and a transmissive display section for conducting display by a transmission light, wherein

a first protection layer, an alignment film for a retardation layer, a retardation layer, and a second protection layer are laminated in this order at a position corresponding to the reflective display section of the first substrate, and

the seal portion at the outer peripheral edge of the display region has a region where the first protection layer and the second protection layer are laminated in this order.

3. The liquid crystal display device according to claim 1, wherein

the material for forming the retardation layer contains an additive for adjusting the wettability.

4. The liquid crystal display device according to claim 3, wherein

the additive is one of acrylic additives, silicon type additives, and fluoric additives.

5. The liquid crystal display device according to claim 3, wherein

the content of the additive is 0.2% by weight or less based on the material for forming the retardation layer.

6. The liquid crystal display device according to claim 1, wherein

the material for forming the retardation layer contains an Si element.

2. A liquid crystal display device having liquid crystals put between a first substrate and a second substrate, and having a reflective display section for conducing display by a reflection light and a transmissive display section for conducting display by a transmission light, wherein

a retardation layer is formed to the first substrate at a position corresponding to the reflective display section at the surface on the side of the liquid crystal, and

a region not formed with an alignment film for the retardation layer is disposed to the first substrate at the seal portion of the outer peripheral edge of the display region at the surface on the side of the liquid crystals.

7. A method of manufacturing a liquid crystal display device having a liquid crystal layer sandwiched in a opposing gap between a first substrate and a second substrate, in which the first substrate and the second substrate are sealed at the outer peripheral edge of the display region by a sealing material, the display region includes a matrix arrangement of a plurality of pixels, and having a reflective display section and a transmissive display section on every pixel,

the method comprising the steps of:

forming an alignment film for a retardation layer to the main surface of the first substrate in the surface of the substrate at least partially or entirely removing a portion of disposing the sealing material,

providing an alignment film for the retardation layer with an alignment control function,

applying an optical retardation material covering the alignment film for retardation layer, and

selectively exposing and curing a portion of the optical retardation material corresponding to the reflective display section.

8. The manufacturing method of a liquid crystal display device according to claim 7, wherein

the material for forming the retardation layer contains an additive for adjusting the wettability.

9. The manufacturing method of a liquid crystal display device according to claim 7, wherein

the additive is one of acrylic additives, silicon type additive, and fluoric additives.

10. The manufacturing method of a liquid crystal display device according to claim 8, wherein the content of the additive is 0.2% by weight or less based on the solidifying ingredient of the optical retardation material.

11. The manufacturing method of a liquid crystal display device according to claim 7, wherein the step of applying the optical retardation material includes the use of an optical retardation material adjusted for the wettability such that the content angle to a test specimen with a contact angle of 650 or more is 20°

or less when it is brought into contact with a droplet of pure water with a specific resistivity of 10 MΩ

cm or higher and measuring the contact angle after 30 sec.

12. A color filter substrate of a liquid crystal display device having a reflective display section and a transmissive display section wherein

a first protection layer, an alignment film for a retardation layer, a retardation layer, and a second protection layer are laminated in this order at a position corresponding to the reflective display section at the main surface on the liquid crystal side of the color filter substrate, and

a region of stacking the first protection layer and the second protection layer in this order is present at a position corresponding to the seal portion at the outer peripheral edge of the display region.

13. A color filter substrate of a liquid crystal display device having a reflective display section and a transmissive display section wherein

a retardation layer is formed at a position corresponding to the reflective display section at the surface on the side of the liquid crystal, and

a region not formed with the alignment film for the retardation layer is present to the seal portion at the outer peripheral edge of the display region at the surface on the side of the liquid crystal.