Display having light-scattering property

Patent metadata

Field	Value
Publication number	US-2016279999-A1
Application number	US-201615176718-A
Country	US
Kind code	A1
Filing date	Jun 8, 2016
Priority date	Apr 18, 2008
Publication date	Sep 29, 2016
Grant date	—

Abstract

A display includes light-scattering regions. Each of the light-scattering regions is provided with linear protrusions and/or recesses having the same longitudinal direction. The light-scattering regions are different from each other in the longitudinal direction.

First claim

What is claimed is:

1 . A display comprising
light-scattering regions each provided with linear protrusions or recesses having the same longitudinal direction, the light-scattering regions being different from each other in the longitudinal direction, and a diffraction grating region provided with a relief structure which forms a diffraction grating.

2 . The display according to claim 1 , wherein the light-scattering regions are in the same plane.

3 . The display according to claim 1 , wherein the light-scattering regions display images, respectively, and the images are distinguishable from each other with an unaided eye.

4 . The display according to claim 1 , wherein each of the light-scattering regions includes an array of cells, each provided with the protrusions or recesses.

5 . The display according to claim 4 , wherein in at least one of the light-scattering regions, the cells included in the at least one light-scattering region include cells different from each other in length and/or width of the protrusions or recesses.

6 . The display according to claim 1 , wherein in at least one of the light-scattering regions, the linear protrusions or recesses are arranged at random.

7 . The display according to claim 1 , wherein in at least one of the light-scattering regions, the linear protrusions or recesses have the same length and width.

8 . The display according to claim 1 , wherein in at least one of the light-scattering regions, an average interval among the protrusion or recesses is equal to or smaller than 10 μm.

9 . The display according to claim 1 , wherein the light-scattering regions include two light-scattering regions having the longitudinal directions orthogonal to each other.

10 . The display according to claim 1 , further comprising a diffraction grating region provided with a relief structure which forms the diffraction grating.

11 . The display according to claim 10 , wherein each of the light-scattering regions includes an array of cells each provided with the protrusions or recesses, and
the diffraction grating region includes an array of cells each provided with the relief structure.

12 . The display according to claim 11 , wherein in at least one of the light-scattering regions, the cells included in the light-scattering region include cells different in at least one of density, size, shape, and depth or height of the protrusions or recesses, and an area ratio of a portion provided with the protrusions or recesses with respect to the cell, and
the cells included in the diffraction grating region include cells different in at least one of spatial frequency, orientation, and depth or height of grooves forming the diffraction grating, and an area ratio of the diffraction grating with respect to the cell.

13 . The display according to claim 1 , wherein in at least one of the light-scattering regions, the protrusions or recesses have planar shapes of circles, ellipses or polygons.

14 . The display according to claim 1 , wherein the light-scattering regions are regions included in a main surface of a layer made of a light-transmitting material, and the display further comprises a reflective layer or a semitransparent reflective layer covering the main surface.

15 . A labeled article comprising:
the display according to claim 1 ; and an article supporting the display.

16 . The display according to claim 5 , wherein in at least one of the light-scattering regions, the cells included in the light-scattering region include first and second cells different from each other in at least one of length and width of the protrusions or recesses, the first and second cells being configured to emit the scattered light at first and second degrees of divergence, respectively, such that an image formed by the first and second cells is seen as an image with light and shade.

Assignees

• Toppan Printing Co Ltd

Inventors

• Toda Toshiki

Classifications

• G02B5/0284

  used in reflection · CPC title

• B42D25/328

  Diffraction gratings; Holograms · CPC title

• B42D25/24

  Passports · CPC title

• G02B5/0278

  used in transmission · CPC title

• G02B5/0263

  with positional variation of the diffusing properties, e.g. gradient or patterned diffuser · CPC title