PROJECTION TYPE DISPLAY DEVICE

PURPOSE:To effectly use zero-order diffracted light by two-dimmensionally scanning a screen by using primary diffracted light which is projected by a light modulating means and projecting the zero-order diffracted light on the screen while two-dimensionally polarizing the light. CONSTITUTION:At an A...

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Bibliographic Details
Main Authors MURATA YASUSHI, MATSUI FUMIO, TANAKA SATORU
Format Patent
LanguageEnglish
Published 23.05.1991
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEALS
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Summary:PURPOSE:To effectly use zero-order diffracted light by two-dimmensionally scanning a screen by using primary diffracted light which is projected by a light modulating means and projecting the zero-order diffracted light on the screen while two-dimensionally polarizing the light. CONSTITUTION:At an A/O modulator 2, incident light is separated into the zero-order diffracted light and the 1st-order diffracted light by Bragg diffraction, and at a prism 3, the 1st-order diffracted light is introduced to a raster scanning system 4 and the zero-order diffracted light is introduced to a vector scanning system 5 as a diffracting means. The 1st-order diffracted light projected on the screen 11 by the raster scanning system 4 is scanned by the operation of a rotating polygon mirror 7 and a galvanomirror 10 on the screen plane in the horizontal and vertical scanning directions. Thus, the zero-order diffracted light is effectly used.
Bibliography:Application Number: JP19890260625