Title:
BRAUN TUBE DISPLAY UNIT
Document Type and Number:
Japanese Patent JPS6086966
Kind Code:
A
Abstract:
A CRT display system providing a raster pattern has digital means 30, 31, 32 to drive a DAC 34. In response, there are supplied analogue signals, on a line 37. There are also provided pulse generating means 90 controlled by the digital means, and integrating means comprising two integrators. Each integrator is connected individually to an X deflection plate 14 of the CRT, and comprises an amplifier and a feedback capacitor. One capacitor C2 is charged by negative-going pulses, and the other capacitor C2' is charged by positive-going pulses, until the pulses are removed, when the required ramps are applied to the deflection plates. Then a current flows through a transistor T7, and is controlled by the DAC output on the line 37. Hence, the waveforms applied to the deflection plates cause distortion of the raster pattern otherwise obtained, to be corrected, the DAC output representing a function comprising the inverse of the function representing the distortion.
Inventors:
ANDORIYUU MAACHIN MARINSON
ADORIAN HAARII UIRIAMU FUTSUDO
ADORIAN HAARII UIRIAMU FUTSUDO
Application Number:
JP19191984A
Publication Date:
May 16, 1985
Filing Date:
September 14, 1984
Export Citation:
Assignee:
FERRANTI LTD
International Classes:
H04N3/23; G09G1/00; G09G1/04; G09G1/16; H04N3/233; (IPC1-7): G09G1/04; H04N3/233
Attorney, Agent or Firm:
Warren G. Simor
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