公开(公告)号：CA2311432A1

公开(公告)日：2001-02-05

申请号：CA2311432

申请日：2000-06-13

Applicant: IBM

Inventor： RAO SEETHARAM G ,  PUDOTA RAJU B S ,  MISRA ASHUTOSH ,  DESAI NARENDRA M ,  MARION NEAL R

IPC: G06F3/14 ,  G09G5/08 ,  G06F3/033

Abstract: Smoother transitions between changing cursor images which are less stressful to the interactive user of a computer controlled display are provided by apparatus for changing the cursor image, including a frame buffer for storing the display screen image as a pixel array, a separate display buffer for storing the current cursor image as a pixel array, togeth er with apparatus for storing an alternate cursor image as a pixel array during the display of the current cursor image, and means for replacing the current cursor image with the alternate cursor image . In raster scan apparatus for maintaining screen images in the frame buffer on said display screen, there are means for effecting the replacement of said cursor images during a vertical blanki ng period in said raster scanning.

公开(公告)号：CA2311432C

公开(公告)日：2007-10-16

申请号：CA2311432

申请日：2000-06-13

Applicant: IBM

Inventor： MISRA ASHUTOSH ,  DESAI NARENDRA M ,  MARION NEAL R ,  PUDOTA RAJU B S ,  RAO SEETHARAM G

IPC: G06F3/14 ,  G09G5/08

Abstract: Smoother transitions between changing cursor images which are less stressful to the interactive user of a computer controlled display are provided by apparatus for changing the cursor image, including a frame buffer for storing the display screen image as a pixel array, a separate display buffer for storing the current cursor image as a pixel array, togeth er with apparatus for storing an alternate cursor image as a pixel array during the display of the current cursor image, and means for replacing the current cursor image with the alternate cursor image . In raster scan apparatus for maintaining screen images in the frame buffer on said display screen, there are means for effecting the replacement of said cursor images during a vertical blanki ng period in said raster scanning.