Display front panel having an anti-reflection layer

• US 20020021393A1
• Filed: 06/15/2001
• Published: 02/21/2002
• Est. Priority Date: 06/16/2000
• Status: Active Grant

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Ochiai, Shinsuke, Muto, Kiyoshi
• Granted Patent: US 6,657,691 B2
• Time in Patent Office: Days
• US Class Current: 349/137
• CPC Class Codes: G02B 1/111 using layers comprising organic materials

Abstract

The present invention provides a display front panel having an anti-reflection layer characterized in that the anti-reflection layer comprises a first layer and a second layer having a smaller optical refractive index value than that of the first layer which are laminated to at least one side of the surfaces of a base plate of a display front panel in a way that the first layer faces the surface(s) of the base plate and the second layer is laminated on the first layer, wherein the first layer is a cured film made of a composition containing (A) a polymerizable compound or an oligomer thereof having at least two unsaturated double bonds, (B) an organo-silicon compound or an oligomer thereof and (C) particles of metal oxide, and

the second layer is a cured film made of an organo-silicon compound.

Claims

1. A display front panel having an anti-reflection layer characterized in that the anti-reflection layer comprises a first layer and a second layer having a smaller optical refractive index value than that of the first layer which are laminated to at least one side of the surfaces of a base plate of a display front panel in a way that the first layer faces the surface(s) of the base plate of the display front panel and the second layer is laminated on the first layer, wherein the first layer is a cured film made of a composition containing (A) a polymerizable compound or an oligomer thereof having at least two unsaturated double bonds and being capable of polymerizing by irradiation of activated energy beams, (B) an organo-silicon compound or an oligomer thereof and (C) particles of metal oxide selected from the group consisting of zirconium dioxide, titanium dioxide, tin dioxide and antimony dioxide, and

the second layer is a cured film made of an organo-silicon compound.

2. The display front panel having an anti-reflection layer according to claim 1, wherein the composition contains from about 20 to about 80 parts by weight of (A) the polymerizable compound or the oligomer thereof, from about 1 to about 20 parts by weight of (B) the organo-silicon compound or the polymer thereof, and from 10 to 70 parts by weight of (C) the particles of metal oxide based on 100 parts by weight of total amount of (A) the polymerizable compound or the oligomer thereof, (B) the organo-silicon compound or the polymer thereof and (C) particles of metal oxide.

3. The display front panel having an anti-reflection layer according to claim 1, wherein the optical refractive index value of the first layer is about 1.5 to about 2.2 and the refractive index value of the second layer is about 1.40 to about 1.49.

4. The display front panel having an anti-reflection layer according to claim 1, wherein the thickness of the first layer is about 0.01 μ

m to about 0.5 μ

m and the thickness of the second layer is about 0.01 μ

m to about 0.5 82 m.

5. The display front panel having an anti-reflection layer according to claim 1, wherein a primary particle diameter of the particles of metal oxide is about 0.001 μ

m to about 0.1 μ

m.

6. The display front panel having an anti-reflection layer according to claim 1, wherein the base plate is provided a hard coat layer on the surface thereof.

7. The display front panel having an anti-reflection layer according to claim 6, wherein the thickness of the hard coat layer is about 0.5 μ

m to about 50 μ

m.

8. The display front panel having an anti-reflection layer according to claim 1, wherein the display front panel is a display front panel for a liquid crystal display, a plasma display television or a projection display television.

9. The display front panel having an anti-reflection layer according to claim 1, wherein the display front panel is a display window plate of a cellular phone.