Victor Company of Japan, Limited

Morihiko Ota

Ryo Nishima

Yuji Suzuki

Yoshitaka Suzuki

Osamu Tajima

Satoshi Yonemitsu

Masanao Asami

One of preferred embodiments of a projection type display apparatus comprises a housing including a first surface inclined at an angle of 45 degrees with respect to an optical axis of the incoming light, a second surface, and a third surface. The second and the third surface each have one edge meeting with each other so that the surfaces are joined perpendicularly with each other and another edge meeting respectively side edges of the first surface so that the surfaces are joined with the first surface. On the first surface is adhered by an adhesive a wire gird polarizer; on the second surface perpendicular to an optical axis of the light that has passed through the wire grid polarizer is adhered by the adhesive a reflection type spatial light modulation element; and on the third surface perpendicular to an optical axis of the light reflected by the wire grid polarizer is adhered by the adhesive a transmission type polarizing plate. The adhesive used has a water vapor transmission rate of 17 g/m&#xb7;day or lower.

Projection type display apparatus

An optical color separation and synthesis system is constructed according to a method, in which four first to fourth polarization beam splitters are arranged in such a manner that polarization separating surfaces of the polarization beam splitters form an X-shape, a predetermined gap is formed between facing surfaces of the polarization beam splitters before bonding the polarization beam splitters onto a base platform, and thereafter a frame comprising an opening in a middle portion thereof and a stepped portion to be bonded to an optical function plate in a peripheral portion thereof is secured to any of the first to fourth polarization beam splitters.

Optical color separation and synthesis system, and method of constructing optical color separation and synthesis system

By mounting a projection lens to a first supporting member for fixing spatial light modulators, polarization beam splitters and a cross dichroic prism, and providing a second supporting member having a thermal expansion coefficient larger than that of the first supporting member between the projection lens and the first supporting member, afluctuation of distance between the spatial light modulators and the projection lens due to heat generated by a light source lamp of a projection type display apparatus and temperature change in use environment can be canceled so that an optimum projected image having nothing to do with being out of focus can always be obtained.

An image printing apparatus having high quality image printing capability due to minimized registration errors is provided. The image printing apparatus has a thermal head 18 and a platen roller 15 which is shorter in its circumference than the length of a pro-cut print medium 2 to be printed. An image is printed on the print medium by transporting the print medium and a ink ribbon 23 between the thermal head and the platen roller. A pair of clamp rings 3, 3 are rotatably and respectively provided approximately along both sides of the print medium, and each clamp ring has a circumference being same to or longer than the length pre-cut print medium, and has an internal gear 3b1. A clamper 5 is installed to connect the clamp rings together, and rotates with the print medium being clamped thereby. A capstan roller 7 is installed between the clamp rings and connected to a drive motor 8 to rotate constantly. A passively rotatable pinch roller 10 is installed and depressed to the capstan roller for transporting the print medium.

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Moriya, Japan

Morihiko Ota