Optical device and three-dimensional display device
First Claim
1. An optical device comprising:
- a transparent material layer having a desired curved surface configuration;
a layer including a variable refractive index material having a dielectric constant anisotropy and having a property in which a sign of a difference Δ
ε
in dielectric constant due to the anisotropy is reversed at driving frequencies f1 and f2;
at least two transparent electrodes arranged to sandwich said transparent material layer and said layer including said variable refractive index material; and
a driving device supplying a voltage including said driving frequencies f1 and f2 between said transparent electrodes.
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Abstract
An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference Δε in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.
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Citations
61 Claims
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1. An optical device comprising:
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a transparent material layer having a desired curved surface configuration;
a layer including a variable refractive index material having a dielectric constant anisotropy and having a property in which a sign of a difference Δ
ε
in dielectric constant due to the anisotropy is reversed at driving frequencies f1 and f2;
at least two transparent electrodes arranged to sandwich said transparent material layer and said layer including said variable refractive index material; and
a driving device supplying a voltage including said driving frequencies f1 and f2 between said transparent electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical device comprising:
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a layer including a variable refractive index material having dielectric constant anisotropy would having a property to reverse signs of a difference of dielectric constant Δ
ε
due to anisotropy at driving frequencies f1 and f2;
at least two transparent electrodes arranged to sandwich said layer including said variable refractive index material; and
a driving device applying a voltage, in which voltages from V1 to VN respectively having respective primary frequencies f1 to fN (N≧
2) are superimposed, between said transparent electrodes. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An optical device comprising:
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a layer of transparent material having a desired curved surface configuration;
a layer including a variable refractive index material having positive or negative dielectric constant anisotropy;
at least two transparent electrodes arranged to sandwich said layer of the transparent material and said layer including the variable refractive index material, and a driving device for always supplying a voltage substantially equal to or greater than an amplitude of a voltage establishing static and vertical alignment in said variable refractive index material. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A three-dimensional display device for forming three dimensional image from two-dimensional image on a display portion, comprising:
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a layer of a transparent material having a desired curved surface configuration;
a layer of a variable refractive index material having a refractive index varying in accordance with a voltage applied thereto;
at least two transparent electrodes arranged to sandwich said layer of the transparent material and said layer including the variable refractive index material;
an imaging position shifting portion for shifting an imaging position of said two-dimensional image displayed on said display portion;
a synchronizing portion for synchronizing an updating period of the two dimensional image displayed on said display portion with a shifting period of the imaging point of said imaging position shifting portion; and
a driving portion for driving said imaging point shifting portion by applying a voltage to said at least two transparent electrodes in accordance with an output from said synchronizing portion. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. A driving method of driving a three-dimensional display device including a display portion for displaying two-dimensional images, an imaging point shifting portion disposed between said display portion and an observer, a synchronizing portion for synchronizing an updating period of the two-dimensional dimensional images displayed on said display portion with a shifting period of the imaging point of said imaging point shifting portion, and a driving portion for driving said imaging point shifting portion, said a driving method comprising the steps of:
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outputting a plurality of driving signals of an output voltage VN (N≧
2) having frequency fN as a primary frequency for a predetermined period of time assigned to each of the driving signals in a predetermined sequence to drive said imaging point shifting portion in said driving portion; and
updating and displaying said two-dimensional images in a predetermined sequence on said display portion in said synchronizing portion. - View Dependent Claims (42)
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41. A driving method of driving a three-dimensional display device including a display portion for displaying two-dimensional images, an imaging point shifting portion disposed between said display portion and an observer, a synchronizing portion for synchronizing an updating period of the two-dimensional images displayed on said display portion with a shifting period of the imaging point said imaging point shifting portion, and a driving portion for driving said imaging point shifting portion, said a driving method comprising the steps of:
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in said driving portion;
generating a driving signal of a predetermined output voltage in which a frequency IN (N≧
2) is superimposed;
applying said driving signal to said imaging position shifting portion;
varying said output voltage in a predetermined sequence in accordance with a synchronization signal of said synchronizing portion; and
in said synchronization portion;
outputting a synchronization signal in said synchronization portion when updating two-dimensional images to be displayed on said display portion. - View Dependent Claims (43)
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44. A three-dimensional display device comprising:
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a phantom three-dimensional display device for displaying a phantom three-dimensional image, and a shutter device formed by a shutter element for controlling a light transmittance, said shutter device being located at a position where said phantom three-dimensional image is reproduced or a position optically equivalent to said position. - View Dependent Claims (45, 46, 47, 48)
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49. A three-dimensional display device comprising:
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a phantom three-dimensional display device for displaying a phantom three-dimensional image; and
a shutter device formed by a shutter element for controlling a light transmittance, said phantom three-dimensional image being a real image, and said shutter element being a photoreactive element for lowering a light transmittance in a real image region at the position of said shutter element in accordance with an imaging light beam of said real image. - View Dependent Claims (50, 51)
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52. A head-mount display device comprising
two display devices corresponding to left and right eyes and each including a two-dimensional display device and an optical device having a variable focal length; - and
a control device for controlling said two dimensional display device and said optical device having a variable focal length, said display devices being mounted to left and right eyes, and said control device synchronously driving said two-dimensional display device and said optical device to perform three-dimensional display. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61)
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Specification