Display apparatus

Patent metadata

Field	Value
Publication number	US-2016018658-A1
Application number	US-201514867284-A
Country	US
Kind code	A1
Filing date	Sep 28, 2015
Priority date	Jun 1, 2011
Publication date	Jan 21, 2016
Grant date	—

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.

First claim

1 - 20 . (canceled)

21 . 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,
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, wherein the second deflection unit is covered with a first one of the two substrates forming the light control device, and wherein there is a gap between the light guide plate and the first one of the substrates.

22 . The display apparatus according to claim 21 , 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.

23 . The display apparatus according to claim 21 , 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.

24 . The display apparatus according to claim 21 , 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.

25 . The display apparatus according to claim 21 , 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.

26 . The display apparatus according to claim 24 ,
wherein the second illuminance sensor is arranged closer to the observer than the optical device.

27 . The display apparatus according to claim 21 ,
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%.

28 . The display apparatus according to claim 22 ,
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.

29 . The display apparatus according to claim 22 ,
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.

30 . The display apparatus according to claim 21 ,
wherein the light control device imparts a desired color to light passing through the light control device.

31 . The display apparatus according to claim 30 , wherein the color imparted by the light control device is variable.

32 . The display apparatus according to claim 30 ,
wherein the color imparted by the light control device is fixed.

33 . The display apparatus according to claim 21 ,
wherein the light control device is removably provided in the region of the optical device from which light is emitted.

34 . 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,
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, wherein the second deflection unit is covered with a first one of the two substrates forming the light control device, and wherein there is a gap between the light guide plate and the first one of the substrates.

35 . 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,
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, wherein the second deflection unit is covered with a first one of the two substrates forming the light control device, and wherein there is a gap between the light guide plate and the first one of the substrates.

36 . A display apparatus comprising:
(i) a glasses-type frame that is mounted on

Assignees

• Sony Corp

Inventors

• Machida Akio
• Takahashi Kenichi
• Takanashi Hidehiko
• Suzuki Kenji

Classifications

• G02B27/0176

  characterised by mechanical features · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/0118

  comprising devices for improving the contrast of the display / brillance control visibility · CPC title

• G02F1/133524

  Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title