AUTOMATIC FOCUSING CONTROLLER

PURPOSE:To always properly execute automatic focusing with respect to every image by changing the magnification of the projecting image and reading an image area whose contrast is strong. CONSTITUTION:When an AF button 38 provided on the outer frame 2A of a screen is depressed, such an action that t...

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1. Verfasser:	KUSAKABE KAZUFUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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creator	KUSAKABE KAZUFUMI
description	PURPOSE:To always properly execute automatic focusing with respect to every image by changing the magnification of the projecting image and reading an image area whose contrast is strong. CONSTITUTION:When an AF button 38 provided on the outer frame 2A of a screen is depressed, such an action that the projected image is enlarged and reduced is executed first so that the edge part of the projected image is detected by an image sensor 5. It is judged, according to the output of the signal of waveform having the contrast from the sensor 5, whether it is the edge of the image or not. When the edge part is recognized, the focusing is executed next so that the inclination of the waveform of the detected contrast becomes the maximum. This is because the edge part of the image is clearly projected under the state that the inclination is the maximum. When the focusing is finished, the magnification of zoom is returned to an original state and operation is finished.
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CONSTITUTION:When an AF button 38 provided on the outer frame 2A of a screen is depressed, such an action that the projected image is enlarged and reduced is executed first so that the edge part of the projected image is detected by an image sensor 5. It is judged, according to the output of the signal of waveform having the contrast from the sensor 5, whether it is the edge of the image or not. When the edge part is recognized, the focusing is executed next so that the inclination of the waveform of the detected contrast becomes the maximum. This is because the edge part of the image is clearly projected under the state that the inclination is the maximum. 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When the focusing is finished, the magnification of zoom is returned to an original state and operation is finished.</description><subject>ACCESSORIES THEREFOR</subject><subject>APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES</subject><subject>APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM</subject><subject>CINEMATOGRAPHY</subject><subject>ELECTROGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHOTOGRAPHY</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1994</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZJB1DA3x93UM8XRWcPN3Dg329HNXcPb3Cwny9_FxDeJhYE1LzClO5YXS3AyKbq4hzh66qQX58anFBYnJqXmpJfFeAR4GZkamBgbmlo7GxKgBALC8IYk</recordid><startdate>19940909</startdate><enddate>19940909</enddate><creator>KUSAKABE KAZUFUMI</creator><scope>EVB</scope></search><sort><creationdate>19940909</creationdate><title>AUTOMATIC FOCUSING CONTROLLER</title><author>KUSAKABE KAZUFUMI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH06250079A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1994</creationdate><topic>ACCESSORIES THEREFOR</topic><topic>APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES</topic><topic>APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM</topic><topic>CINEMATOGRAPHY</topic><topic>ELECTROGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHOTOGRAPHY</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>KUSAKABE KAZUFUMI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KUSAKABE KAZUFUMI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>AUTOMATIC FOCUSING CONTROLLER</title><date>1994-09-09</date><risdate>1994</risdate><abstract>PURPOSE:To always properly execute automatic focusing with respect to every image by changing the magnification of the projecting image and reading an image area whose contrast is strong. CONSTITUTION:When an AF button 38 provided on the outer frame 2A of a screen is depressed, such an action that the projected image is enlarged and reduced is executed first so that the edge part of the projected image is detected by an image sensor 5. It is judged, according to the output of the signal of waveform having the contrast from the sensor 5, whether it is the edge of the image or not. When the edge part is recognized, the focusing is executed next so that the inclination of the waveform of the detected contrast becomes the maximum. This is because the edge part of the image is clearly projected under the state that the inclination is the maximum. When the focusing is finished, the magnification of zoom is returned to an original state and operation is finished.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
title	AUTOMATIC FOCUSING CONTROLLER
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