JP2002148713A5 - - Google Patents

Description

[0021]
[Means for Solving the Problems]
This invention was made in order to solve the said subject, and each invention is projected on a screen using several projection type imaging devices, and the invention of Claim 1 joins the edge part of each image mutually. A video joining apparatus for creating a large video, which is disposed in front of a light projection lens of a video generating unit provided in the projection type video apparatus, and shields an end of projected light to adjust the brightness of the junction; The light shielding plate has a multi-layer structure in which a plurality of flexible film-like filters are stacked so that the transmittance gradually decreases from the central portion to the peripheral portion of the projection light, and It is characterized in that the bonding width is extended and the increase in luminance due to the diffraction action of the projection light is suppressed.

[0029]
In FIG. 8, the widths R of the displacements of the edge portions of these band filters 50, 51, 52 are substantially the same, and this width is optimum according to the setting of the distance between the video image projector and the screen 16 and the width of the junction T. Values can be determined experimentally.
The filter of each concentration which comprises the density | concentration inclination shielding board 21 is a film-like flexible sheet | seat, and is comparatively thin film-like. Further, the thickness of the superposed concentration gradient shielding plate 21 is about 1 mm, and when it is bent to a bending degree, it is possible to form a smooth curve by sliding displacement slightly with respect to the bending.

[0033]
Next, on the front of the lens of the other projector 60 to be joined as shown in FIG. 10, the density gradient shield plate 22 with the characteristics of the composite brightness curve k and the reverse gradient (lower left) of the downward right of FIG. can be the brightness of them if the joint T adds become almost the same level as the internal brightness 1.0 in both windows, to integrate the screen images of the plurality images uniform with no continuous seam the boundary (screen) brightness .

[0036]
Therefore, if the edge P is not parallel to the lattice (longitudinal and lateral) array of the lens 17 group of the light collecting lens 7 of the light source, fringes will not be generated completely if especially near the middle 45 degrees.
On the other hand, when joining the left and right images (screens) on the screen 16 , the light shielding plate 21 has to be disposed vertically (horizontally in the upper and lower connection), and the influence of the slight vertical stripes can not be escaped The

Claims (1)

An image joining apparatus for projecting each image on a screen using a plurality of projection type imaging devices and connecting the ends of each image to each other to create a wide image,
A light shielding plate which is disposed in front of a light projecting lens of an image generating unit provided in the projection type video apparatus and shields an end portion of the projection light to adjust the brightness of the connecting portion from the central portion of the projection light The film has a multi-layered structure in which a plurality of flexible film-like filters are stacked so that the transmittance gradually decreases toward the part, the bonding width of the connecting part of the image is extended, and the diffraction action of the projection light An apparatus for joining images by a plurality of projectors characterized in that the increase in brightness due to

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