IMAGE DISPLAY APPARATUS

• US 20110032706A1
• Filed: 10/22/2010
• Published: 02/10/2011
• Est. Priority Date: 11/29/2007
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Mukawa, Hiroshi
• Granted Patent: US 8,220,966 B2
• Time in Patent Office: Days
• US Class Current: 362/268
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 2027/0174 holographic
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/102 for generating a colour image from monochromatic image signal sources
• CPC Class Codes: G02B 27/1033 having a single light modulator for all colour channels
• CPC Class Codes: G02B 27/149 using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes
• CPC Class Codes: G02B 3/0056 arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 6/0015 provided on the surface of the light guide or in the bulk of it
• CPC Class Codes: G02B 6/0035 provided on the surface of the light guide or in the bulk of it

Abstract

An image display apparatus includes an image forming device having pixels; a collimating optical system collimating light from the image forming device; and an optical device receiving, guiding, and outputting the collimated light as directional rays in different directions. The optical device includes a light-guiding plate; a first optical member reflecting or diffracting the light so as to totally reflect the light inside the light-guiding plate; and a second optical member causing the propagated light to emerge from the light-guiding plate. When a light ray emitted from a pixel located farthest from the center of the image forming device and a light ray emitted from a pixel located at the center of the image forming device pass through a front nodal point of the collimating optical system and are respectively incident on the collimating optical system and the light-guiding plate at angles θ₁ and θ₂, θ₂>θ₁ is satisfied.

Claims

1. An image display apparatus comprising:

an image forming device having a plurality of pixels;

a collimating optical system; and

an optical device configured to receive light, guide the light therethrough, and output the light,

wherein, when light emitted from a pixel located farthest from a center of the image forming device and passing through a nodal point of the collimating optical system near to the image forming device is incident on the collimating optical system at an angle of θ

₁, and when light emitted from a pixel located at the center of the image forming device and passing through the nodal point of the collimating optical system near to the image forming device is incident on the light-guiding plate at an angle of θ

₂, a condition of θ

₂>

θ

₁ is satisfied.

2. An image display apparatus comprising:

an image forming device having a plurality of pixels arranged in a two-dimensional matrix;

a collimating optical system configured to collimate light emitted from the pixels of the image forming device; and

an optical device configured to receive the light collimated by the collimating optical system into a plurality of directional rays in different traveling directions, guide the light therethrough, and output the light,

wherein the directional ray incident on the light-guiding plate is obliquely angled with respect to a normal to the plane of incidence of the light-guiding plate.