DISPLAY APPARATUS

• US 20120306940A1
• Filed: 05/09/2012
• Published: 12/06/2012
• Est. Priority Date: 06/01/2011
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Machida, Akio, Takahashi, Kenichi, Takanashi, Hidehiko, Suzuki, Kenji
• Application Number:
  US13/467,779
• Publication Number:
  US 20120306940A1
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/0176 characterised by mechanical features
• CPC Class Codes: G02B 6/005 provided by one optical element, or plurality thereof, placed on the light output side of the light guide
• CPC Class Codes: G02F 1/133524 Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 2201/44 Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
• CPC Class Codes: G06T 19/006 Mixed reality object pose determination, tracking or camera calibration for mixed reality G06T7/00
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

A display apparatus includes: (i) a glasses-type frame that is mounted on the head of an observer; and (ii) an image display device that is attached to the frame, wherein the image display device includes (A) an image forming device, and (B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted, a light control device that adjusts an amount of external light incident from the outside is provided in a region of the optical device from which light is emitted, and the light control device includes two opposite transparent substrates, electrodes that are provided on the substrates, and an electrophoretic dispersion liquid that is sealed between the two substrates.

Claims

1. A display apparatus comprising:

(i) a glasses-type frame that is mounted on the head of an observer; and

(ii) an image display device that is attached to the frame,

wherein the image display device includes

(A) an image forming device, and

(B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted,

a light control device that adjusts an amount of external light incident from the outside is provided in a region of the optical device from which light is emitted, and

the light control device includes

two opposite transparent substrates,

electrodes that are provided on the substrates, and

an electrophoretic dispersion liquid that is sealed between the two substrates.

2. The display apparatus according to claim 1, further comprising:

an illuminance sensor that measures the illuminance of an environment in which the display apparatus is located,

wherein the transmittance of the light control device is controlled on the basis of the measurement result of the illuminance sensor.

3. The display apparatus according to claim 1, further comprising:

an illuminance sensor that measures the illuminance of an environment in which the display apparatus is located,

wherein the brightness of an image formed by the image forming device is controlled on the basis of the measurement result of the illuminance sensor.

4. The display apparatus according to claim 1, further comprising:

a second illuminance sensor that measures illuminance on the basis of light which passes through the light control device from an external environment,

wherein the transmittance of the light control device is controlled on the basis of the measurement result of the second illuminance sensor.

5. The display apparatus according to claim 1, further comprising:

a second illuminance sensor that measures illuminance on the basis of light which passes through the light control device from an external environment,

wherein the brightness of an image formed by the image forming device is controlled on the basis of the measurement result of the second illuminance sensor.

6. The display apparatus according to claim 4,

wherein the second illuminance sensor is arranged closer to the observer than the optical device.

11. The display apparatus according to claim 1,

wherein the maximum transmittance of the light control device is equal to or greater than 50% and the minimum transmittance of the light control device is equal to or less than 30%.

12. The display apparatus according to claim 2,

wherein, when the measurement result of the illuminance sensor is equal to or greater than a predetermined value, the transmittance of the light control device is equal to or less than a predetermined value.

13. The display apparatus according to claim 2,

wherein, when the measurement result of the illuminance sensor is equal to or less than a predetermined value, the transmittance of the light control device is equal to or greater than a predetermined value.

14. The display apparatus according to claim 1,

wherein the light control device imparts a desired color to light passing through the light control device.

15. The display apparatus according to claim 14,

wherein the color imparted by the light control device is variable.

16. The display apparatus according to claim 14,

wherein the color imparted by the light control device is fixed.

17. The display apparatus according to claim 1,

wherein the light control device is removably provided in the region of the optical device from which light is emitted.

18. The display apparatus according to claim 1,

wherein the optical device includes:

(a) a light guide plate in which incident light propagates while being totally reflected and from which the light is emitted;

(b) a first deflection unit that deflects light incident on the light guide plate so as to be totally reflected in the light guide plate; and

(c) a second deflection unit that deflects the light, which propagates in the light guide plate while being totally reflected, a plurality of times so as to be emitted from the light guide plate.

19. The display apparatus according to claim 18,

wherein the second deflection unit is disposed in a projection image of the light control device.

20. The display apparatus according to claim 19,

wherein the second deflection unit is covered with one of the two substrates forming the light control device.

7. A display apparatus comprising:

(i) a glasses-type frame that is mounted on the head of an observer;

(ii) an image display device that is attached to the frame; and

an illuminance sensor that measures the illuminance of an environment in which the display apparatus is located,

wherein the image display device includes

(A) an image forming device, and

(B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted,

a light control device that adjusts the amount of external light incident from the outside is provided in a region of the optical device from which light is emitted, and

the transmittance of the light control device is controlled on the basis of the measurement result of the illuminance sensor.

8. A display apparatus comprising:

(i) a glasses-type frame that is mounted on the head of an observer;

(ii) an image display device that is attached to the frame; and

an illuminance sensor that measures the illuminance of an environment in which the display apparatus is located,

wherein the image display device includes

(A) an image forming device, and

(B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted,

a light control device that adjusts the amount of external light incident from the outside is provided in a region of the optical device from which light is emitted, and

the brightness of an image formed by the image forming device is controlled on the basis of the measurement result of the illuminance sensor.

9. A display apparatus comprising:

(i) a glasses-type frame that is mounted on the head of an observer;

(ii) an image display device that is attached to the frame; and

an illuminance sensor,

wherein the image display device includes

(A) an image forming device, and

(B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted,

a light control device that adjusts the amount of external light incident from the outside is provided in a region of the optical device from which light is emitted,

the illuminance sensor measures illuminance on the basis of light which passes through the light control device from an external environment, and

the transmittance of the light control device is controlled on the basis of the measurement result of the illuminance sensor.

10. A display apparatus comprising:

(i) a glasses-type frame that is mounted on the head of an observer;

(ii) an image display device that is attached to the frame; and

an illuminance sensor,

wherein the image display device includes

(A) an image forming device, and

(B) an optical device on which light emitted from the image forming device is incident, in which the light is guided, and from which the light is emitted,

a light control device that adjusts the amount of external light incident from the outside is provided in a region of the optical device from which light is emitted, the illuminance sensor measures illuminance on the basis of light which passes through the light control device from an external environment, and

the brightness of an image formed by the image forming device is controlled on the basis of the measurement result of the illuminance sensor.