# US 10,501,017 B2 · Vehicle mirror with image display function

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- Number: US 10,501,017 B2
- Document ID: US10501017B2
- Status: Granted
- Kind: B2
- Application number: 15/837,441
- Filed: 2017-12-11
- Published: 2018-04-12
- Granted: 2019-12-10
- Earliest claimed: 2015-06-24
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Takao Taguchi; Kazuhiro Oki; Mitsuyoshi Ichihashi; Akihiro Anzai
- Web page: https://patentgrep.com/patent/US10501017B2

## CPC

- B60R 1/08: involving special optical features, e.g. avoiding blind spots {, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors (B60R1/025, B60R1/10 take precedence)}
- B60R 1/04: mounted inside vehicle {(B60R1/025, B60R1/08 take precedence)}
- B60R 1/12: Mirror assemblies combined with other articles, e.g. clocks
- G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00)
- G02B 5/3016: {involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528)}
- G02B 5/3041: {comprising multiple thin layers, e.g. multilayer stacks}
- G02B 5/3083: {Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001)}
- B60R 2001/1215: {with information displays}
- B60R 2001/1253: {with cameras, video cameras or video screens}
- G02B 5/3058: {comprising electrically conductive elements, e.g. wire grids, conductive particles}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A vehicle mirror with an image display function includes a half mirror which includes a high-Re retardation film and a reflection layer and an image display device on the half mirror, in which the high-Re retardation film, the reflection layer, and the image display device are disposed in this order, the high-Re retardation film has a front phase difference of 5000 nm or greater, and the reflection layer is a linear polarization reflection layer or a circular polarization reflection layer.

## Claims

### Claim 1

A vehicle mirror with an image display function comprising:
a half mirror which includes a high-Re retardation film and a circular polarization reflection layer; and
an image display device on the half mirror,
wherein the high-Re retardation film, the circular polarization reflection layer, and the image display device are disposed in this order,
the high-Re retardation film has a front phase difference of 5000 nm or greater,
the circular polarization reflection layer includes a cholesteric liquid crystal layer, and
the cholesteric liquid crystal layer is a layer in which a cholesteric liquid crystalline phase is fixed.

### Claim 2 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the front phase difference is 7000 nm or greater.

### Claim 3 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the circular polarization reflection layer includes three or more cholesteric liquid crystal layers.

### Claim 4 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the half mirror includes a ¼ wavelength plate, and
the high-Re retardation film, the circular polarization reflection layer, and the ¼ wavelength plate are provided in this order.

### Claim 5 (depends on 4)

The vehicle mirror with an image display function according to claim 4,
wherein the circular polarization reflection layer and the ¼ wavelength plate are in direct contact with each other.

### Claim 6 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the half mirror includes a front surface plate, and
the front surface plate, the high-Re retardation film, and the circular polarization reflection layer are provided in this order.

### Claim 7 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the half mirror includes a front surface plate,
the front surface plate is a laminated glass including two glass plates and an interlayer between the two glass plates, and
the interlayer includes the high-Re retardation film.

### Claim 8 (depends on 1)

The vehicle mirror with an image display function according to claim 1,
wherein the half mirror is a laminated glass including two glass plates and an interlayer between the two glass plates, and
the interlayer includes the high-Re retardation film and the circular polarization reflection layer.