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US 10,539,793 B2Granted
Head mounted image display device and display device
AssigneeSony Corporation
InventorHiroshi Mukawa
Life of this patent
Estimating the term…
Abstract
There is provided an image display device including (A) an image forming device, (B) an optical device configured to receive incident light output from the image forming device and output the incident light, and (C) a light receiving device configured to detect the light output from the image forming device.
Claims16
An image display device comprising:
- an image forming device;
- an optical device configured to receive incident light output from the image forming device and output the incident light, the optical device including a light guide plate configured to cause the incident light to propagate inside the light guide plate according to total reflection and then output the incident light;
- a light receiving device arranged on a first surface of the light guide plate and configured to detect the light output from the optical device;
- and
- a control device configured to control an image output from the image forming device based on a detection result from the light receiving device,
- wherein the optical device further includes:
- a first polarizing unit arranged on a second surface of the light guide plate and configured to polarize the light incident on the light guide plate so that the light incident on the light guide plate is totally reflected inside the light guide plate, and
- a second polarizing unit arranged on the second surface of the light guide plate and configured to polarize the light propagating inside the light guide plate according to total reflection to output the light propagating inside the light guide plate according to total reflection from the light guide plate,
- wherein the light receiving device is configured to detect an occurrence of an abnormality in the image display device based on an image detected by the light receiving device, the image being detected based on the part of the light received by the light receiving device from the second polarizing unit, and
- wherein the first surface of the light guide plate and the second surface of the light guide plate face each other.
7 more elements
A display device comprising:
- a frame to be mounted on a head of an observer;
- and
- an image display device mounted on the frame, the image display device including:
- an image forming device,
- an optical device configured to receive incident light output from the image forming device and output the incident light, the optical device including a light guide plate configured to cause the incident light to propagate inside the light guide plate according to total reflection and then output the incident light,
- a light receiving device arranged on a first surface of the light guide plate and configured to detect the light output from the optical device;
- and
- a control device configured to control an image output from the image forming device based on a detection result from the light receiving device,
- wherein the optical device further includes:
- a first polarizing unit arranged on a second surface of the light guide plate and configured to polarize the light incident on the light guide plate so that the light incident on the light guide plate is totally reflected inside the light guide plate, and
- a second polarizing unit arranged on the second surface of the light guide plate and configured to polarize the light propagating inside the light guide plate according to total reflection to output the light propagating inside the light guide plate according to total reflection from the light guide plate,
- wherein the light receiving device is configured to detect an occurrence of an abnormality in the image display device based on an image detected by the light receiving device, the image being detected based on the part of the light received by the light receiving device from the second polarizing unit, and
- wherein the first surface of the light guide plate and the second surface of the light guide plate face each other.
10 more elements
An image display device comprising:
- an image forming device configured to include a liquid crystal display device and a light source;
- a light guide plate configured to propagate light output from the image forming device;
- and
- a light receiving device arranged on a first surface of the light guide plate and configured to detect part of light output from the optical device;
- and
- a control device configured to control an image output from the image forming device based on a detection result from the light receiving device,
- wherein a first polarizing unit is disposed inside the light guide plate, is arranged on a second surface of the light guide plate, and is configured to polarize the light incident on the light guide plate so that the light incident on the light guide plate is totally reflected inside the light guide plate, and
- a second polarizing unit is disposed inside the light guide plate, is arranged on the second surface of the light guide plate, and is configured to polarize the light propagating inside the light guide plate according to total reflection to output the light propagating inside the light guide plate according to total reflection from the light guide plate,
- wherein the light receiving device is configured to detect an occurrence of an abnormality in the image display device based on an image detected by the light receiving device, the image being detected based on the part of the light received by the light receiving device from the second polarizing unit,
- wherein a wavelength of light output from the light source is controlled based on the detection of the occurrence of the abnormality in the image display device by the light receiving device, and
- wherein the first surface of the light guide plate and the second surface of the light guide plate face each other.
8 more elements
Dependencies are inferred from the claim text.