Browse Prior Art Database

Super High Intensity Circuit

IP.com Disclosure Number: IPCOM000099301D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Aruga, N: AUTHOR [+3]

Abstract

Disclosed is a circuit to achieve high contrast suppressing a beam current in a monochrome monitor has two kinds of attributes; a high intensity field a normal intensity field.

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This is the abbreviated version, containing approximately 83% of the total text.

Super High Intensity Circuit

       Disclosed is a circuit to achieve high contrast
suppressing a beam current in a monochrome monitor has two kinds of
attributes; a high intensity field a normal intensity field.

      The table shows the combination of the normal intensity and the
high intensity video.  Fig. 1 shows CRTC Ray Tube Controller)
circuit.  Fig. 2 shows the amplifier circuit.

      Referring to Fig. 1, a refresh buffer stores character which
selects font image in a character generator and such as high
intensity and reverse (positive corresponding to the characters.  A
character generates the font image which is selected by the code.  An
attribute controller receives the font and generates a normal video
and high intensity signal to the rule of this method.

      In  Fig. 2, the video signals #1 and #2 are each to a video
pre-amplifiers.  The output current from pre-amplifier is supplied to
a video output amplifier.  The output amplifier drives the cathode of
the CRT:
             Table
Video Signal
 #1       #2          Displayed Character
Normal  High-int.
  0        0          No display
  1        0          Normal intensity in negative and
                      positive mode
  0        1          High intensity in positive mode
  1        1          High intensity in negative mode
where
negative mode. light characte...