Multilayer image display device

• US 10,146,497 B2
• Filed: 03/23/2017
• Issued: 12/04/2018
• Est. Priority Date: 05/18/2016
• Status: Active Grant

• Current Assignee: Alpine Electronics Incorporated (Alps Alpine Co., Ltd.)
• Original Assignee: Alpine Electronics Incorporated (Alps Alpine Co., Ltd.)
• Inventors: Imanishi, Shunichi
• Primary Examiner(s): Bukowski, Kenneth
• Application Number:
  US15/467,552
• Publication Number:
  US 20170337024A1
• Time in Patent Office: 621 Days
• CPC Class Codes: B60K 2360/23 using reflectors
• CPC Class Codes: B60K 2360/27 using semi-transparent optical elements
• CPC Class Codes: B60K 2360/31 Virtual images
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 2380/10 Automotive applications
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: H04N 9/315 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 Class Codes: H04N 9/317 Convergence or focusing systems electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53

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.

Claims

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.