Mirror with image display function

Patent metadata

Field	Value
Publication number	US-10175399-B2
Application number	US-201715609358-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	Dec 1, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

According to the invention, there is provided a mirror with an image display function including, in this order: an image display device; a ¼ wavelength plate; a circular polarization reflection layer; and a front surface plate made of glass or plastic, in which the circular polarization reflection layer includes a cholesteric liquid crystal layer, and the cholesteric liquid crystal layer has a central wavelength of selective reflection in a visible light region. The mirror with an image display function of the invention is capable of displaying a bright image.

First claim

What is claimed is:

1. A mirror with an image display function comprising, in this order:
an image display device;
a ¼ wavelength plate;
a circular polarization reflection layer; and
a front surface plate made of glass or plastic,
wherein the circular polarization reflection layer includes four or more cholesteric liquid crystal layers, and the four or more cholesteric liquid crystal layers have different central wavelengths of selective reflection,
wherein the circular polarization reflection layer includes a cholesteric liquid crystal layer having a central wavelength of selective reflection in a red light wavelength region, a cholesteric liquid crystal layer having a central wavelength of selective reflection in a green light wavelength region, a cholesteric liquid crystal layer having a central wavelength of selective reflection in a blue light wavelength region, and a cholesteric liquid crystal layer having a central wavelength of selective reflection in an infrared light region.

2. The mirror with an image display function according to claim 1 ,
wherein two or more cholesteric liquid crystal layers of the four or more cholesteric liquid crystal layers are in direct contact with each other.

3. The mirror with an image display function according to claim 1 ,
wherein in the circular polarization reflection layer, a cholesteric liquid crystal layer having a longer central wavelength of selective reflection is disposed closer to the image display device.

4. The mirror with an image display function according to claim 1 ,
wherein the ¼ wavelength plate is a layer formed by curing a composition containing a polymerizable liquid crystal compound.

5. The mirror with an image display function according to claim 1 ,
wherein the circular polarization reflection layer and the ¼ wavelength plate are in direct contact with each other.

6. The mirror with an image display function according to claim 1 ,
wherein the image display device and the ¼ wavelength plate are directly adhered to each other through an adhesive layer.

7. The mirror with an image display function according to claim 1 ,
which has an outer frame.

Assignees

• Fujifilm Corp

Inventors

• Anzai Akihiro
• Oki Kazuhiro
• Ichihashi Mitsuyoshi
• Taguchi Takao

Classifications

• G02F1/13363

  Birefringent elements, e.g. for optical compensation · CPC title

• B60R1/088

  using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors · CPC title

• G09F9/00

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title

• A47G1/04

  Multi-part mirrors · CPC title

• A47G1/06

  Picture frames (making from paper B31D) · CPC title