Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Reexamination Certificate
2005-12-27
2005-12-27
Lee, Wilson (Department: 2821)
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
C315S368240, C348S806000
Reexamination Certificate
active
06979944
ABSTRACT:
Provided are a display device, and more particularly, a display device shared between a digital-to-analog converter for outputting a convergence signal and a digital-to-analog converter for outputting a dynamic focus signal, in a projection television using 3 cathode-ray tube projection optics. The display device includes a convergence and dynamic focus corrector and operation processor which corrects a convergence to adjust red and blue color images to a green color image using horizontal and vertical sync signals and controls a focus to converge focuses of portions of an image displayed on central and peripheral portions of a screen using the horizontal and vertical sync signals; a first digital-to-analog converter which converts corrected horizontal red, green, and blue signals and a dynamic focus control signal sequentially output from the convergence and dynamic focus corrector and operation processor into analog signals; a second digital-to-analog converter which converts corrected vertical red, green, and blue signals sequentially output from the convergence and dynamic focus corrector and operation processor into analog signals; and a multiplexer which selectively switches and outputs the analog signals output from the first and second digital-to-analog converters in response to a selection control signal output from the convergence and dynamic focus corrector and operation processor.
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Ryu Il-hyeon
Shim Jae-seung
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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