Projection type display device and image displaying method

• US 20090290127A1
• Filed: 07/29/2009
• Published: 11/26/2009
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Aizaki, Takatsugu, Miyake, Masahiko, Kobayashi, Manabu, Murata, Toshitaka, Fukutomi, Hironobu, Takahashi, Ryusaku
• Granted Patent: US 8,337,025 B2
• Time in Patent Office: Days
• US Class Current: 353/30
• CPC Class Codes: H04N 21/42204 User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor constructive details of casings for the remote control device H01H9/0235; user interfaces for controlling a tuning device of a television receiver through a remote control H03J9/00; remote control of peripheral devices connected to a television receiver through the remote control device of the television receiver H04B1/205
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 5/7416 involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026
• CPC Class Codes: H04N 9/3185 Geometric adjustment, e.g. keystone or convergence optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A projection type display device includes a image displaying element 20 having image display areas 20a, 20b for displaying a plurality of images respectively, a projection optical system 30A having an emitting part for emitting projection light flux to the image display areas 20a, 20b of the image displaying element 20, and a plurality of screens for displaying projected images by the projection light flux transmitted through the image display areas 20a, 20b of the image displaying element 20. In the projection type display device, the image display areas are formed in respective areas in the image displaying element independent of each other. The projected images on the screens correspond to the image display areas, respectively. Each of the screens is arranged in such a position that the each of the screens is not overlapped with shadows of the other screens which are produced since the projection light flux is emitted from the emitting part to the screens.

Claims

1. A projection type display device comprising:

at least one image displaying element having a plurality of image display areas for displaying a plurality of images respectively;

a projection optical system having an emitting part for emitting light flux from the image display areas of the image displaying element as projection light flux; and

a plurality of screens for displaying projected images thereon by the projection light flux emitted from the emitting part, wherein

the image display areas are formed in areas independent of each other in the image displaying element,

the projected images on the screens correspond to the image display areas, respectively, and

each of the screens is arranged in such a position that the each of the screens is not overlapped with shadows of the other screens which are produced since the projection light flux is emitted from the emitting part to the screens.

2. The projection type display device of claim 1, wherein the screens are arranged in positions where respective linear distances between the emitting part and the screens are different from each other.

3. The projection type display device of claim 1, wherein:

the screens are movable relatively to each other, and

one of the screens closest to the emitting part is adapted to cover the emitting part when the one screen is moved.

4. A projection type display device comprising:

a light source;

an image displaying element having a first image display area and a second image display area and optically modulating light flux from the light source by the first image display area and the second image display area based on a first video signal and a second video signal, both inputted from an outside, thereby to produce a first image and a second image;

a projection optical system having an emitting part and projecting respective fluxes as projection light flux, which are obtained by optically modulating the light flux by the image displaying element, from the emitting part;

a first screen for displaying the first image since the projection light flux is irradiated to the first screen; and

a second screen arranged between the emitting part and the first screen for displaying the second image since the projection light flux is irradiated to the second screen,

wherein the second screen is arranged in such a position that the first screen is not overlapped with a shadow of the second screen which is produced since the projection light flux emitted from the emitting part is irradiated to the second screen.

5. The projection type display device of claim 4, further comprising

a light transmissive member arranged on an outside part of the first screen to have an optical transparency, and defining respective fluxes of the projection light flux irradiated to the first screen and the second screen as a first partial flux and a second partial flux, respectively,

wherein an extension area of the second partial flux transmitted through the second screen intersects with the light transmissive member.

6. The projection type display device of claim 4, wherein:

the second screen is displaceable, and

the projection light flux is irradiated to only the first screen on condition that the second screen is displaced.

7. The projection type display device of claim 4, wherein the second screen can be displaced to a position to cover the emitting part.

8. The projection type display device of claim 4, wherein the projection optical system includes:

a projection lens for projecting the respective fluxes optically modulated by the image displaying element in enlargement; and

a reflecting part having any one of an aspherical concave mirror, a flat mirror, and an aspherical convex mirror, all of which can reflect the respective fluxes transmitted through the projection lens.

9. The projection type display device of claim 4, wherein the first screen and the second screen are formed by either light transmissive screens or light reflective screens.

10. An imaging displaying method comprising the steps of:

optically modulating light flux emitted from a light source at different areas in an image display area of an image displaying element based on a first video signal and a second video signal, both inputted from an outside, thereby producing first light flux and second light flux;

emitting projection light flux containing the first light flux and the second light flux produced from an emitting part of a projection optical system;

displaying a first image based on the first video signal on a first screen arranged on an optical path of the first light flux so that at least part of the first screen intersects with the first light flux; and

displaying a second image based on the second video signal on a second screen arranged between the first screen and the emitting part on an optical path of the second light flux so that at least part of the second screen intersects with the second light flux.