Anzeigeverfahren und -gerät

• Main Authors: NAGASAKI, KATSUHIKO, TATSUMI, EISAKU, HARADA, TAKASHI, SUNAKAWA, SHINICHI, MATSUBAYASHI, KAZUHIRO, SHIMADA, KAZUTOSHI, MORI, SHIGEKI, FUKUDA, RYOJI
• Format: Patent
• Language: German
• Published: 01.08.2002
• Edition: 7
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

According to the invention, on the basis of a deviation between an optical axis direction of a projection light and a normal line direction of a projection plane, image data can be changed and displayed so as to set off a distortion of a display image which occurs due to such a deviation. A quality of the display image is raised and a use efficiency is improved. In the invention, the image data is constructed by (m x n) pixels, the left upper position is set to an origin, an X axis is set to the lateral direction, and a Y axis is set to the vertical direction. A quadrangle ABCD corresponds to mapping data of an image stored in a memory. For example, in the case where the projection plane is inclined and the display image on the projection plane is enlarged as it approaches the right, the image is changed like a quadrangle ABEF. Namely, the image data is changed while increasing a reduction ratio in the vertical direction toward the right of the image. By projecting such changed image data onto the projection plane, the distortion occurring by the projection and the distortion on the mapping data are set off, so that an image without a distortion is displayed.