Title:
PICTURE SUPERIMPOSITION CONTROL SYSTEM
Document Type and Number:
Japanese Patent JPH0216882
Kind Code:
A
Abstract:
PURPOSE:To change a superimposing area at high speed by writing a display change command in a control register to control the switching timing of a selector to output picture data from a refresh memory. CONSTITUTION:The switching timing of the selector 3 is controlled by the control register 6, and the outputs of the refresh memories 1, 2 are supplied through the selector 3, and display by a CRT 5 in which the picture, etc., of the memory 2 is superimposed at a right end, etc., of the picture data of the memory 1 is performed. Then, when the display change command is written in the register 6 from a processor 7, the switching timing of the selector 3 is changed, and the picture data of the memory 2 is superimposed and displayed at the lower end, etc., of the picture data of the memory 1, and the superimposing area can be changed at high speed according to an instruction from the processor.
Inventors:
NAKATANI MITSUYOSHI
Application Number:
JP16661488A
Publication Date:
January 19, 1990
Filing Date:
July 04, 1988
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
FUJI FACOM CORP
FUJI FACOM CORP
International Classes:
H04N5/32; (IPC1-7): H04N5/32
Attorney, Agent or Firm:
Iwao Yamaguchi
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