3D DISPLAY DEVICE AND METHOD

• US 20130258461A1
• Filed: 01/22/2013
• Published: 10/03/2013
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: SATO, Teruyuki, Yoshikawa, Hiroyasu, Itoh, Takashi, Moribe, Mineo, Umada, Takahiro
• Granted Patent: US 9,030,737 B2
• Time in Patent Office: Days
• US Class Current: 359/464
• CPC Class Codes: G02B 2027/0134 of stereoscopic type
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 30/34 Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers

Abstract

A 3D display device that includes: a first optical section of focal distance f1 provided with a group of small lenses arrayed along a specific direction; and a second optical section of focal distance f2 that converges N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to offset the N beams from an optical axis. A distance d1 between the first optical section and the second optical section satisfies f2−f1≦d1≦f2 and a viewing distance d2 from the second optical section satisfies d2≈f2.

Claims

1. A 3D display device comprising:

a display section that extracts respective single pixels from corresponding N individual images with mutually different viewpoints, that composes an elemental pixel by arranging the N extracted pixels in a specific sequence along a specific direction for all the pixels of the N individual images and that displays a combined image in which the N individual images have been combined;

a first optical section of focal distance f1 provided with a group of small lenses arrayed along the specific direction, the respective individual small lenses being disposed along the specific direction so as to each correspond to mutually different single display regions of the elemental pixels in the display section and the respective individual small lenses separating rays of light emitted from the N pixels of the corresponding elemental pixels into N beams of parallel light with mutually different light ray directions; and

a second optical section of focal distance f2 that converges the N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to offset the N beams from the optical axis, wherein

a distance d1 between the first optical section and the second optical section satisfies

f2−

f1≧

d1≧

f2 and

a viewing distance d2 from the second optical section satisfies

d2≈

f2.

2. The 3D display device of claim 1, wherein the distance d1 between the first optical section and the second optical section satisfies d1=f2.

3. The 3D display device of claim 1, wherein

the first optical section is a lenticular lens, and

the specific sequence is the reverse sequence to the disposed sequence of viewpoints along the specific direction of the original N individual images from which each of the N pixels is extracted.

4. A 3D display method comprising:

disposing a display section, a first optical section and a second optical section so that a distance d1 between the first optical section and the second optical section satisfies

f2−

f1≧

d1≦

f2 and

a viewing distance d2 from the second optical section satisfies

d2≈

f2; and

displaying a combined image on the display section, wherein

the display section extracts respective single pixels from corresponding N individual images with mutually different viewpoints, composes an elemental pixel by arranging the N extracted pixels in a specific sequence along a specific direction for all the pixels of the N individual images and displays the combined image in which the N individual images have been combined,

the first optical section of focal distance f1 is provided with a group of small lenses arrayed along the specific direction, the respective individual small lenses being disposed along the specific direction so as to each correspond to mutually different respective single display regions of the elemental pixels in the display section and the individual small lenses separating rays of light emitted from the N pixels of the corresponding elemental pixels into N beams of parallel light with mutually different light ray directions, and

the second optical section of focal distance f2 converges the N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to be offset from the optical axis.

5. The 3D display method of claim 4, wherein the first optical section and the second optical section are disposed such that the distance d1 between the first optical section and the second optical section satisfies d1=f2.

6. The 3D display method of claim 4, wherein

the first optical section is a lenticular lens, and

the specific sequence is the reverse sequence to the disposed sequence of viewpoints along the specific direction of the original N individual images from which each of the N pixels is extracted.