the present invention relates in general to an image projector, and more particularly to an optical system for such a projector which is capable of compensating the keystoning, in which keystoning the projected image on a screen appears as a reversed trapezoidal shape, thereby projecting an image without occurrence of the keystoning on the screen disposed at a desired height.capable of projecting hand-writing or drawing during action G03B21/00- Projectors or projection-type viewers Accessories therefor.G03B- APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR.G03- PHOTOGRAPHY CINEMATOGRAPHY ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ELECTROGRAPHY HOLOGRAPHY. H04N9/317- Convergence or focusing systems.H04N9/3141- Constructional details thereof.using electronic spatial light modulators H04N9/31- Projection devices for colour picture display, e.g.H04N9/00- Details of colour television systems.Application granted granted Critical Publication of US5283602A publication Critical patent/US5283602A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links OF KOREA ASSIGNMENT OF ASSIGNORS INTEREST. OF KOREA reassignment GOLDSTAR CO., LTD., A CORP. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from KR2019900021875U external-priority patent/KR970006585Y1/en Priority claimed from KR1019910016928A external-priority patent/KR930006497A/en Application filed by Gold Star Co Ltd filed Critical Gold Star Co Ltd Assigned to GOLDSTAR CO., LTD., A CORP. Original Assignee Gold Star Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Kwon Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US07/815,115 Inventor Soon H. Google Patents Optical system for projectorĭownload PDF Info Publication number US5283602A US5283602A US07/815,115 US81511591A US5283602A US 5283602 A US5283602 A US 5283602A US 81511591 A US81511591 A US 81511591A US 5283602 A US5283602 A US 5283602A Authority US United States Prior art keywords light image screen mirror optical path Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5283602A - Optical system for projector If you look for a plural word, use a singular word.US5283602A - Optical system for projector The ASL signs for French and France are the same. Likewise, if you look for an adjective word, try the noun or vice versa. If you look for "said", look up the word "say". For search in the dictionary, use the present-time verbs and base words. For plurals, verb inflections, word order, etc., learn grammar in the "ASL Learn" section. Video speed: Signing too fast in the videos? See HELP in the footer.ĪSL has its own grammar and structure in sentences that works differently from English. Browsing all the way down to the next search box is highly recommended. There are several signs for different meanings, contexts, and/or variations. Videos: The first video may be NOT the answer you're looking for. If you don't find a word/sign, you can send your request (only if a single link doesn't show in the result). :)Īdd a Word: This dictionary is not exhaustive ASL signs are constantly added to the dictionary. If you cannot find (perhaps overlook) a word but you can still see a list of links, then keep looking until the links disappear! Sharpening your eye or maybe refine your alphabetical index skill. "to", "he", etc.) to narrow down the words and pages in the list.įor best result, enter a short word in the search box, then select the alphetical letter (and page number if needed), and click on the blue link.ĭon't forget to click "All" back when you search another word with a different initial letter. For best result, enter a partial word to see variations of the word.Īlphabetical letters: It's useful for 1) a single-letter word (such as A, B, etc.) and 2) very short words (e.g. Click on the blue link to look up the word. Search/Filter: Enter a keyword in the filter/search box to see a list of available words with the "All" selection.
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