Display device

Patent metadata

Field	Value
Publication number	US-2016347246-A1
Application number	US-201615163283-A
Country	US
Kind code	A1
Filing date	May 24, 2016
Priority date	Jun 1, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A display device includes a first display surface that emits light and displays vehicle information, and a second display surface that is placed on the first display surface in an overlapping manner, transmits the light emitted from the first display surface, and on which grooves that form a drawing pattern are created, wherein the grooves with a groove pitch are created so as to prevent diffracted light having visible light range components that is emitted from the first display surface and that is diffracted by the grooves from forming an image in an eye range determined in advance according to a vehicle.

First claim

What is claimed is:

1 . A display device comprising:
a first display surface that emits light and displays vehicle information; and a second display surface that is placed on the first display surface in an overlapping manner, transmits the light emitted from the first display surface, and on which grooves that form a drawing pattern are created, wherein the grooves with a groove pitch are created so as to prevent diffracted light having a visible light range component that is emitted from the first display surface and that is diffracted by the grooves from forming an image in an eye range determined in advance according to a vehicle.

2 . The display device according to claim 1 , wherein
the groove pitch is at a maximum within a range of a predetermined area in which the diffracted light having a visible light range component that is emitted from the first display surface and that is diffracted by the grooves does not form an image.

3 . The display device according to claim 1 , wherein
the first display surface displays the vehicle information by light polarized in a single direction, and the grooves extend in a direction intersecting with a polarization direction of the light being polarized.

4 . The display device according to claim 2 , wherein
the first display surface displays the vehicle information by light polarized in a single direction, and the grooves extend in a direction intersecting with a polarization direction of the light being polarized.

5 . A display device comprising:
a first display surface that emits light and displays an image related to vehicle information; and a second display surface that is placed on the first display surface in an overlapping manner, transmits the light emitted from the first display surface, and on which grooves that form a drawing pattern is created, wherein an incident surface of light to the first display surface and the second display surface, and an exit surface of light from the second display surface are parallel to each other, and the grooves extend in a horizontal direction and prevent diffracted light having a visible light range component that is emitted from the first display surface and that is diffracted by the grooves from forming an image within an angle range of 20 degrees with respect to a normal line of the first display surface in a vertical direction, based on an intersection between the first display surface and the normal line of the first display surface, by making a groove pitch equal to or more than zero and equal to or less than 0.5 μm.

6 . The display device according to claim 5 , wherein
the groove pitch is at a maximum within a range of a predetermined area in which the diffracted light having a visible light range component that is emitted from the first display surface and that is diffracted by the grooves does not form an image.

7 . The display device according to claim 5 , wherein
the first display surface displays the vehicle information by light polarized in a single direction, and the grooves extend in a direction intersecting with a polarization direction of the light being polarized.

8 . The display device according to claim 6 , wherein
the first display surface displays the vehicle information by light polarized in a single direction, and the grooves extend in a direction intersecting with a polarization direction of the light being polarized.

Assignees

• Yazaki Corp

Inventors

• Fujita Sunao

Classifications

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• G02B6/006 Primary

  to produce indicia, symbols, texts or the like · CPC title

• B60Q1/26

  the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic · CPC title

• B60Q3/004

  Operations & Transport · mapped topic

• B60Q3/046

  Operations & Transport · mapped topic