The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2005
Filed:
Jan. 12, 2001
Ken Yamamoto, Yokohama, JP;
Kiyoshi Hidaka, Yokohama, JP;
Teruhisa Kudo, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This invention provides an image display apparatus for displaying data stored in a random access memory (RAM) such as LCD, more specifically a display driver achieving easy and flexible display control such as scroll in a display screen without increasing load on CPU and an image display apparatus including the same. This display driver comprises an RAM for storing the display data to be displayed on the display screen, a latch shift register for receiving the display data read out from the RAM and if the display screen is intended to be scrolled in a horizontal direction, shifting the read out display data depending on the scrolling direction and if the display screen is intended to be scrolled in a vertical direction, holding the read out display data and an access control circuit for reading out the display data from the RAM and if the display screen is intended to be scrolled in a horizontal direction, writing back the display data shifted by the latch shift register into an original position in the RAM and if the display screen is intended to be scrolled in a vertical direction, writing back the display data held by the latch shift register from the original position of the RAM to a position shifted by the amount of the scroll.