Head mounted display

Patent metadata

Field	Value
Publication number	US-2016238236-A1
Application number	US-201514829531-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Feb 18, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

Disclosed is a head mounted display (HMD) having light emitting devices. The HMD includes a body having a plurality of surfaces; and a plurality of light emitting units formed on the plurality of surfaces and configured to emit light to outside of the body, wherein each of the plurality of light emitting units includes at least four light emitting devices that are disposed in a straight line in a spaced manner such that a specific cross ratio defines spacing for each of the plurality of light emitting units, a cross ratio of one of the plurality of light emitting units being different from cross ratios of other light emitting units among the plurality of light emitting units.

First claim

What is claimed is:

1 . A head mounted display, comprising:
a body having a plurality of surfaces; and a plurality of light emitting units, each of the plurality of light emitting units formed on a corresponding one of the plurality of surfaces and configured to emit light to outside of the body, wherein each of the plurality of light emitting units includes at least four light emitting devices that are disposed in a straight line in a spaced manner such that a specific cross ratio defines spacing for each of the plurality of light emitting units, a cross ratio of one of the plurality of light emitting units being different from cross ratios of other light emitting units among the plurality of light emitting units.

2 . The head mounted display of claim 1 , wherein:
the specific cross ratio is determined based on a ratio of distances separating two adjacently located light emitting devices among the at least four light emitting devices; and each of the plurality of light emitting units is formed to have a different ratio of distances.

3 . The head mounted display of claim 2 , wherein a first ratio of distances separating two adjacently located light emitting devices among the at least four light emitting devices included in a first one of the plurality of light emitting units is different from a second ratio of distances separating two adjacently located light emitting devices among at least four light emitting devices included in a second one of the plurality of light emitting units.

4 . The head mounted display of claim 1 , wherein two of the at least four light emitting devices emit light in a first manner that is different from a second manner in which light is emitted from the rest of the at least four light emitting devices.

5 . The head mounted display of claim 4 , wherein:
the two light emitting devices are first light emitting devices that emit light of which brightness is changed at preset time intervals; and the rest of the at least four light emitting devices are second light emitting devices that emit light of a constant brightness.

6 . The head mounted display of claim 5 , wherein:
the first light emitting devices are light emitting devices that are arranged at two ends among the at least four light emitting devices; and the second light emitting devices are light emitting devices that are arranged between the first light emitting devices.

7 . The head mounted display of claim 5 , wherein the brightness of the light that is emitted from the first light emitting devices is changed to be greater than a preset brightness.

8 . The head mounted display of claim 5 , wherein each of the plurality of light emitting units further includes two third light emitting devices that are disposed at a position that is distant from the straight line and is configured to emit light of a constant brightness.

9 . The head mounted display of claim 8 , wherein the two third light emitting devices are arranged such that a straight line formed by any two among the first and second light emitting devices and a straight line formed by the two third light emitting devices are not parallel to each other.

10 . The head mounted display of claim 9 , wherein the any two among the first and second light emitting devices are the first light emitting devices.

11 . The head mounted display of claim 8 , wherein the two third light emitting devices included in one of the plurality of light emitting units are arranged to be located closer to any one among the first and second light emitting devices included in the one of the plurality of light emitting units than to any one among first to third light emitting devices included in a different one of the plurality of light emitting units.

12 . The head mounted display of claim 11 , wherein the two third light emitting devices included in the one of the plurality of light emitting units are arranged such that a distance from any one of the first light emitting devices included in the one of the plurality of light emitting units to any one of the two third light emitting devices is shorter than a distance from the first light emitting device included in the different one of the plurality of light emitting units to any one of the two third light emitting devices.

13 . The head mounted display of claim 12 , wherein a distance between one of the two third light emitting devices included in the one of the plurality of light emitting units and one of the two first light emitting devices included in the one of the plurality of light emitting units that is located closer to the one of the two third light emitting devices is shorter than distances between the third light emitting device and the first light emitting device that are included in the different one of the plurality of light emitting units.

14 . The head mounted display of claim 8 , wherein the first to third light emitting devices are arranged such that each of distances that separate any two of the first to third light emitting devices has a value that is greater than a preset value.

Assignees

• Lg Electronics Inc

Inventors

• Im Soungmin
• Kim Sungjin
• Baek Sungmin

Classifications

• G01S5/163 Primary

  Determination of attitude (using inertial means G01C9/00; control of attitude G05D1/49) · CPC title

• F21V19/001

  the light sources being semiconductors devices, e.g. LEDs · CPC title

• G02B2027/0187

  slaved to motion of at least a part of the body of the user, e.g. head, eye · CPC title

• G02B27/0101

  characterised by optical features (G02B27/0172 takes precedence) · CPC title

• G02B2027/0138

  comprising image capture systems, e.g. camera · CPC title