Illumination device

Patent metadata

Field	Value
Publication number	US-2017334341-A1
Application number	US-201515523007-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Nov 7, 2014
Publication date	Nov 23, 2017
Grant date	—

Abstract

An illumination device has a coherent light source that emits coherent light beam, and an optical device that diffuses the coherent light beam, wherein the optical device comprises a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area.

First claim

1 . An illumination device comprising:
a coherent light source that emits coherent light beam; and an optical device that diffuses the coherent light beam, wherein the optical device comprises a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area.

2 . The illumination device according to claim 1 , comprising a scanning unit that scans the coherent light beam emitted by the coherent light source on the optical device,
wherein the first diffusion region diffuses coherent light beam from the scanning unit to illuminate the first area, and the second diffusion region diffuses the coherent light beam from the scanning part and to display the predetermined information in the second area.

3 . The illumination device according to claim 1 , wherein the second diffusion region displays the information by changing at least one of hue, brightness, and chroma in the second area.

4 . The illumination device according to claim 3 , wherein the second diffusion region displays the information including at least one of a picture, a pattern, a character, a number, and a symbol in a single color or in a plurality of colors.

5 . The illumination device according to claim 1 , wherein the first area and the second area are arranged so as not to overlap one another.

6 . The illumination device according to claim 1 , wherein the first area and the second area are arranged so that at least parts of the first area and the second area overlap one another.

7 . The illumination device according to claim 2 , wherein the scanning unit scans the coherent light beam on the first diffusion region and the second diffusion region.

8 . The illumination device according to claim 1 , wherein
the first diffusion region has a plurality of first element diffusion regions and the plurality of first element diffusion regions diffuse incident coherent light beams to illuminate respective partial regions.

9 . The illumination device according to claim 1 , wherein
the second diffusion region has a plurality of second element diffusion regions and the plurality of second element diffusion regions diffuse incident coherent light beams to display the diffused coherent light beams on respective partial regions.

10 . The illumination device according to claim 2 , wherein the scanning unit comprises a light scanning device that periodically changes a traveling direction of the coherent light beam emitted from the coherent light source.

11 . The illumination device according to claim 1 , wherein the illumination device comprises a timing control unit that controls an incident timing of the coherent light beam on the optical device or controls an illumination timing in the first area and a display timing in the second area.

12 . The illumination device according to claim 1 , comprising a timing control unit that controls whether or not to scan the coherent light beam from the scanning unit on at least one of the first diffusion region and the second diffusion region.

13 . The illumination device according to claim 12 , comprising an object detection unit that detects an object in a predetermined area, wherein
the timing control unit controls a scanning timing of the coherent light beam in at least one of the first diffusion region and the second diffusion region, in accordance with a position of the object detected by the object detection unit.

14 . The illumination device according to claim 12 , wherein the timing control unit controls the scanning timing of the coherent light beam in the first diffusion region so that the object detected by the object detection unit is illuminated in the first area.

15 . The illumination device according to claim 14 , wherein the timing control unit controls the scanning timing of the coherent light beam in the first diffusion region so that the first area is positioned in a region where the object detected by the object detection unit does not exist.

16 . The illumination device according to claim 12 , comprising an event detection unit that detects an occurrence of a specific event, wherein
the timing control unit controls the scanning timing of the coherent light beam in at least one of the first diffusion region and the second diffusion region when it is detected by the event detection unit that the specific event has occurred.

17 . The illumination device according to claim 1 , wherein
the coherent light source comprises a plurality of light emitting units that emit a plurality of coherent light beams having different emission wavelength ranges, and at least one of the first diffusion region and the second diffusion region has a plurality of diffusion region parts to be scanned by the plurality of coherent light beams.

18 . The illumination device according to claim 1 , wherein
the optical device is a hologram recording medium, and the first diffusion region and the second diffusion region have element hologram areas in which different interference fringe patterns are formed.

19 . The illumination device according to claim 1 , wherein
the optical device is a lens array group having a plurality of lens arrays, and the first diffusion region and the second diffusion region comprise the lens arrays.

20 . The illumination device according to claim 1 , wherein
the optical device comprises a hologram recording medium and a lens array group having a plurality of lens arrays, and one of the first diffusion region and the second diffusion region comprises the hologram recording medium and another comprises the lens array group.

21 . The illumination device according to claim 12 , wherein the timing control unit controls a timing at which the coherent light beam from the scanning unit is continuously scanned on the first diffusion region, and the coherent light beam from the scanning unit is scanned on the second diffusion region.

22 . The illumination device according to claim 12 , comprising an information selection unit that selects the information to be displayed in the second area, wherein
the timing control unit controls a timing at which the coherent light beam from the scanning unit is scanned on the second diffusion region based on the information selected by the information selection unit.

23 . The illumination device according to claim 22 , comprising a route information acquiring unit that acquires route information for traveling, wherein
the information selection unit selects the information to be displayed in the second area based on route information acquired by the route information acquiring unit.

24 . The illumination device according to claim 23 , wherein the information selection unit selects the information capable of discriminating at least one of a direction to travel and a direction not to travel based on the route information acquired by the route information acquiring unit.

25 . The illumination device according to claim 22 , wherein the information selection unit selects the information of a display mode capable of discriminating one candidate route to travel among a plurality of candidate routes and the other candidate route.

26 . The illumination device according to claim 25 , wherein the information selection unit selects information for displaying one candidate route to

Assignees

• Dainippon Printing Co Ltd

Inventors

• Kurashige Makio
• Sato Tomoe
• Ishida Kazutoshi

Classifications

• G03H2001/2284

  Superimposing the holobject with other visual information · CPC title

• G03H2210/20

  2D object · CPC title

• G03H2001/0232

  Mechanical components or mechanical aspects not otherwise provided for · CPC title

• G03H2001/2273

  Pseudo-dynamic holobject, e.g. due to angle multiplexing and viewer motion · CPC title

• G03B21/2033

  LED or laser light sources · CPC title