Virtual screen display device
First Claim
1. A virtual screen display apparatus comprising:
- a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
wherein a diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
1 Assignment
0 Petitions
Accused Products
Abstract
A virtual screen display apparatus includes a display arranged to generate display information and having an effective diagonal length DLC and an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element. A field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer. A diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied:
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Citations
36 Claims
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1. A virtual screen display apparatus comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A virtual screen display apparatus comprising:
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a display means for outputting display information and having an effective diagonal length DLC;
an optical projecting means for receiving the display information from the display and for projecting and forming an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical means for forming an in-space image in a position of a virtual screen and for directing a divergent light flux from the virtual screen to form an image in a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
- View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of manufacturing a virtual screen display apparatus comprising the steps of:
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providing a display for generating display information and having an effective diagonal length DLC;
providing an optical projecting element adjacent to the display to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
providing a field optical element adjacent to the optical projecting element to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to form an image in a view region where the image is viewable to an observer; and
selecting the display, the optical projecting element and the field optical element to have characteristics such that the following equation is satisfied;
- View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A television comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
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27. A television telephone apparatus comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
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28. A computer comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between virtual screen and the view region is VSP, and the following equation is satisfied;
- View Dependent Claims (29, 30, 31, 32)
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33. A video player comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein S1 is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
- View Dependent Claims (34, 35)
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36. A virtual screen display apparatus comprising:
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a display arranged to generate display information and having an effective diagonal length DLC;
an optical projecting element arranged to receive the display information from the display and to project and form an image, the optical projecting element having an effective F number which is defined by Fe=S1/PuD wherein SI is a distance between the display and a principal point of the optical projecting element and PuD is a diameter of an exit pupil of the optical projecting element; and
a field optical element arranged to form an in-space image in a position of a virtual screen and to direct a divergent light flux from the virtual screen to a view region where the image is viewable to an observer;
whereina diameter of a range in which the image is viewable to the observer in the view region is ERD and a diagonal length of the virtual screen is VSD and a distance between the virtual screen and the view region is VSP, and the following equation is satisfied;
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Specification