Browse Prior Art Database

Multiple Image Format Liquid Crystal Display

IP.com Disclosure Number: IPCOM000116204D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Iida, H: AUTHOR

Abstract

Disclosed is a device for Liquid Crystal Display (LCD) which displays various screen image formats (VGA, XGA, SXGA, and so on) with a full-size screen.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 75% of the total text.

Multiple Image Format Liquid Crystal Display

      Disclosed is a device for Liquid Crystal Display (LCD) which
displays various screen image formats (VGA, XGA, SXGA, and so on)
with a full-size screen.

      CRT display has a capability to display various image formats
such as VGA(640x 480), XGA(1024x768),and SXGA(1280x1024) with a
full-size screen.  These formats are widely used on personal
computers.  It is required to display these formats on LCD display
when LCD display is designed.  As LCD panel has dot matrix by nature,
it is difficult to display an image format which has different dot
configuration from that of the LCD panel.  For example, when a VGA
image is displayed on an XGA panel, only 640x480 dots are used to
display the image with a small size.  If a VGA screen is displayed on
a full-size screen, some of the lines are repeated and displayed.
Some graphical distortions are generated during this process.

      The Figure shows the example of this device.  The signal
analyzer detects the screen image format from the horizontal signal
and the vertical signal.  Display Position Controller always controls
to display the image on the center of the LCD panel with appropriate
image format based on the information from the signal analyzer.   If
the LCD panel has enough dot matrix, the image is magnified by a
integral number on the LCD panel.  The image on the LCD panel is
projected to the display screen by an optical system.  The
magnification...