Multilayer image display device

Patent metadata

Field	Value
Publication number	US-10146497-B2
Application number	US-201715467552-A
Country	US
Kind code	B2
Filing date	Mar 23, 2017
Priority date	May 18, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A two-layer image display device includes a back side LCD, a transparent screen, and a lower side LCD. The back side LCD displays an image on a display screen. The transparent screen is disposed on a front side of the display screen of an image display device. The lower side LCD projects an image from a lower position of the transparent screen. The transparent screen reflects, with directivity, light incident at a predetermined angle and includes an anisotropic optical film which transmits light incident at an angle other than the predetermined incident angle. The lower side LCD is disposed at a position where the image incident at the predetermined angle is projected and reflected on the transparent screen. The back side LCD is disposed at a position where incident light from an image displayed on the display screen transmits through the transparent screen.

First claim

What is claimed is:

1. A multilayer image display device, comprising; an image display device configured to display an image on a display screen; a transparent screen disposed on a front side of the display screen of the image display device; and an image projection device configured to project an image from a lower position below the transparent screen, wherein the transparent screen reflects, with directivity, light incident at a predetermined angle and includes an anisotropic optical film which transmits light incident at an angle other than the predetermined angle, wherein the image projection device is disposed at a position relative to the transparent screen where light of the projected image is incident at the predetermined angle and reflected on the transparent screen, and wherein the image display device is disposed at position relative to the transparent screen where light of the displayed image is incident at an angle other than the predetermined angle and transmitted through the transparent screen.

2. The multilayer image display device according to claim 1 , wherein an orientation of the image projection device is selectively adjustable to adjust an angle incident to the transparent screen to the predetermined angle.

3. The multilayer image display device according to claim 1 , wherein a light source of the image projection device is a specific direction converging light source which converges light in a specific direction.

4. The multilayer image display device according to claim 3 , wherein the image projection device comprises a converging light angle adjustment unit configured to adjust a converging angle of the specific direction converging light source.

5. The multilayer image display device according to claim 1 , wherein the image display device and the image projection device comprise an LCD panel which displays an image by using a backlight as a light source.

6. The multilayer image display device according to claim 1 , wherein display screens of the image display device and the image projection device are AR coated screens.

Assignees

• Alpine Electronics Inc

Inventors

• Imanishi Shunichi

Classifications

• B60K2350/2052

  Operations & Transport · mapped topic

• H04N9/315

  Modulator illumination systems (general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20) · CPC title

• G09G3/36

  using liquid crystals · CPC title

• B60K2350/2039

  Operations & Transport · mapped topic

• G06F3/147 Primary

  using display panels · CPC title