20-03-2014 дата публикации
Номер: US20140078591A1
An image display apparatus includes an image forming device, a collimating optical system, and an optical device. The optical device includes a light guide plate, a first deflecting member that deflects light incident on the light guide plate, and a second deflecting member that deflects the light, which propagates in the light guide plate by total reflection, a plurality of times. The first and second deflecting members are provided in the light guide plate. Light having one wavelength emitted from at least one pixel satisfies the following condition: 1. An image display apparatus comprising:an image forming device;an optical system; andan optical device on which a light is incident from the optical system, in which the light is guided, and from which the light is emitted,wherein the optical device includes a light guide plate, first deflecting means, and second deflecting means,wherein the light guide plate has the first deflecting means and the second deflecting means, {'br': None, 'i': t', '≦Lh−', 't, '2·tan θ−21≦2·tan θ+2'}, 'wherein the following condition is satisfiedwhere an axial direction of the light guide plate is the Y-direction, a normal direction of the light guide plate is the X-direction, LH−1 (unit: mm) represents an effective length of the first deflecting means in the Y-direction, t represents the thickness of the light guide plate, and □ represents the incident angle of the light, which is totally reflected in the light guide plate, on an inner surface of the light guide plate.2. The image display apparatus according to claim 1 , wherein the second deflecting means includes a layered structure including a plurality of dielectric films.3. The image display apparatus according to claim 2 , wherein the dielectric films include a first dielectric film including a high dielectric constant material and a second dielectric film including a low dielectric constant material.4. The image display apparatus according to claim 2 , wherein the layered ...
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