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A fully digital convergence system for projection TV

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7 Author(s)
Shiomi, M. ; Hitachi Ltd., Yokohama, Japan ; Ohsawa, M. ; Ando, K. ; Sakamoto, T.
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A high-precision fully digital convergence system for home-use PTVs (projection televisions) has been developed. The use of digital circuits and the curved-line interpolation technique can reduce the misconvergence to less than 2 mm (it is 4-6 mm in the conventional system). The use of time-division processing in the digital-to-analog converter and the newly developed gate array realizes a low-cost system and reduces the number of variable resistors to 6 (there are 30-45 in a conventional system). The system can handle nonstandard signals reproduced from VCRs, and can also be applied to EDTV, HDTV, and so on

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Consumer Electronics, IEEE Transactions on  (Volume:36 ,  Issue: 3 )