Nippon Telegraph and Telephone Corporation

Nippon Telegraph and Telephone Corportion

Tomoyoshi Nomura

Yukio Takahashi

Shigenobu Sakai

Takayuki Okimura

Kiyoshi Masuda

Kazuo Kimura

Kazutake Uehira

Shigeto Kohda

Noboru Hagiwara

The present invention relates to a light ray shift element which provides controlled refraction of the incident ray and an optical axis displacement device using the above light ray shift element. An application of these optical devices to an interleave projection display system is demonstrated. The optical element is constructed from transparent flat plate materials containing a first optical medium and are disposed at a predetermined spacing along the optical axis. The orientation angle of the transparent flat plates with respect to the optical axis can be varied independently. A bulkhead consisting of the transparent flat plates and a second optical medium having an index of refraction different from the first optical medium, which is enclosed in a hermetic extendable seal, is utilized to provide light ray shift and optical axis displacement. By selecting the first and second optical media suitably, the angle of refraction of the incident ray can be controlled to optimize the quality of the image generated by the interleave projection system.

Light ray shift devices and projection display apparatus using the same

Optical element and optical axis displacement device using the same

An original image is divided into a plurality of image parts in the forms of image signals which are then given to liquid crystal light valves, respectively so that liquid crystal light valves display the plurality of image parts therein. These liquid crystal light valves allow light from light sources to pass through so as to form image light beams which are intensity-modulated in accordance with the divided image parts. A plurality of mirrors reflect the image light beams and introduce them onto a projecting lens system. In this arrangement, the plurality of mirrors are located in such a way that their reflecting surfaces do not cross the optical axis of the projecting lens system, and the image light beams are synthesized on the screen so as to reproduce an original image. Accordingly, the pixel density of the original image can be multiplied by a multiplier which equal to the number of used liquid crystal light valves.

Projector

An active matrix type display device is disclosed having an m number of unit pixel array blocks repetitively arranged in a row direction. Each pixel array block comprises a k rows.times.n columns matrix of display elements (Cij, i=1, 2, . . . n, j=1, 2, . . . n) and scanning lines G1 . . . Gn and data signal lines D1 . . . Dn are arranged in an intersecting fashion with first and second switching elements of each display element connected to the corresponding lines in a manner to provide different data input routes.

Method of operation for an active matrix type display device

Growing community of inventors

Tokyo, Japan

Tomoyoshi Nomura