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Title:
REGISTRATION DEVICE
Document Type and Number:
Japanese Patent JPH07236149
Kind Code:
A
Abstract:

PURPOSE: To attain highly accurate registration adjustment necessary for a high picture quality projector at a low cost and to easily execute the adjustment by providing this registration device with correction waveform generating means adopting an analog system and a digital system.

CONSTITUTION: The registration device is provided with a correction waveform generating system of an analog type consisting of a reference waveform generating part 1 and a matrix circuit 2 and a correction waveform generating system of a digital type consisting of a memory 6, a controller 7 and a D/A converter 8. In the analog type correction waveform generating system, the circuit 2 controls the adding rate of a reference waveform supplied from the generating part 1 to set up a correction value and corrects the registration of the whole picture by the small quantity of data. A corrected waveform having the distortion having a degree higher than quartic is obtained by the digital type correction waveform generating system. Thereby for corrected data, the data obtained by calculation from a distortion component detected by practically picking up a raster image is recorded in an EP-ROM in a production stage.


Inventors:
NAKAMURA TOSHIYA
Application Number:
JP4471494A
Publication Date:
September 05, 1995
Filing Date:
February 21, 1994
Export Citation:
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Assignee:
SONY CORP
International Classes:
H04N9/31; (IPC1-7): H04N9/31
Attorney, Agent or Firm:
Atsuo Waki (1 person outside)



 
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