METHOD AND DEVICE FOR FORMING MASK PLATE
PURPOSE:To highly improve the picture quality of a pattern area by electronically meshing on a meshed plate by means of a mask plate forming device without using a contact screen. CONSTITUTION:An analogue picture signal having a voltage value corresponding to a density value at every picture element...
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| creator | OGAWA YOSHIO YABUMOTO SHINJI OI MICHIO |
| description | PURPOSE:To highly improve the picture quality of a pattern area by electronically meshing on a meshed plate by means of a mask plate forming device without using a contact screen. CONSTITUTION:An analogue picture signal having a voltage value corresponding to a density value at every picture element outputted from a line sensor 25 is time sequentially inputted to an A/D converter 32 and converted to a digital signal. Said signal is shaded and corrected in a shading correction circuit 33 and inputted in a gradation circuit 34. Said circuit 34 regulates the characteristic of an output voltage with respect to an input voltage and attains a delicate density control. At the time of forming a mask 7, the gradation circuit 34 is adjusted so as to obtain a gradation curve B so that said circuit 34 is functioned as a binarization circuit. |
| format | Patent |
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CONSTITUTION:An analogue picture signal having a voltage value corresponding to a density value at every picture element outputted from a line sensor 25 is time sequentially inputted to an A/D converter 32 and converted to a digital signal. Said signal is shaded and corrected in a shading correction circuit 33 and inputted in a gradation circuit 34. Said circuit 34 regulates the characteristic of an output voltage with respect to an input voltage and attains a delicate density control. At the time of forming a mask 7, the gradation circuit 34 is adjusted so as to obtain a gradation curve B so that said circuit 34 is functioned as a binarization circuit.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION |
| title | METHOD AND DEVICE FOR FORMING MASK PLATE |
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