Browse Prior Art Database

LCD-Projector has Window Display Function of Multi PCs with Different Resolution by Using Time-sharing Method

IP.com Disclosure Number: IPCOM000123993D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 3 page(s) / 98K

Publishing Venue

IBM

Related People

Itoh, H: AUTHOR [+3]

Abstract

Disclosed is a method for LCD-Projector, which minimizes Hardware circuit, by using time-sharing method to deal with multi PCs VIDEO data with different and various resolutions (ex. SXGA, XGA and VGA).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 70% of the total text.

LCD-Projector has Window Display Function of Multi PCs with Different
Resolution by Using Time-sharing Method

   Disclosed is a method for LCD-Projector, which minimizes
Hardware circuit, by using time-sharing method to deal with multi
PCs VIDEO data with different and various resolutions (ex. SXGA, XGA
and VGA).

   This method deals with multi PC's Video (ex. SXGA-aa-XGA
or XGA etc.) data by dividing process duration as T1, T2, T3, T4,
continuously as Figure. 2 below.

   On Figure. 2, within T1 duration, it deals with a
synchronization process of Vsync/Hsync/RGB of 1st PC-1 video data,
after the synchronization, writes 1st PC-1 Video data for 1 frame
into the allocated Frame memory (F-2: Frame memory for multi PCs
(PC-1/PC-2/PC-3/PC-4))

   At the next time, within T2 duration, it deals with a
synchronization process of Vsync/Hsync/RGB of 2nd PC-2 video data,
after the synchronization, writes 2nd PC-2 Video data for 1 frame
into the allocated Frame memory (F-2: Frame memory for multi PCs
(PC-1/PC-2/PC-3/PC-4))

   In the same manner with T1 and T2, within T3 and T4, it
deals with a synchronization and writing process of video data of
3rd PC-3 and 4th PC-4.

   After that, it returns to T1, it repeats the same vido
data process of PC-1/PC-2/PC-3/PC-4, continuously.

   On the other hand, F-1(Frame-memory for PC-0) is written
with PC-0's Video data after synchronization.

   At last, in order to get a merged Window screen, an
address of reading F-1 (Frame-memory fo...