公开(公告)号：JP2001195150A

公开(公告)日：2001-07-19

申请号：JP2000000423

申请日：2000-01-05

Applicant: IBM

Inventor： NAKAZAWA YUKIFUMI ,  NISHIOKA YOSHIO ,  WADA TAKAHIDE ,  KATAYAMA KEN

IPC: G06F3/02 ,  F21V33/00 ,  F21Y101/02 ,  G06F1/16 ,  G09F9/00

Abstract: PROBLEM TO BE SOLVED: To provide a computer with a lighting fixture for a keyboard. SOLUTION: In this portable computer 100, an LED holder 150 is provided on top of an LCD 109 and an LED is mounted inside the LED holder 150. A keyboard 103 is irradiated with light emitted from the LED through an opening provided on the bottom of the LED holder 150. In addition, on/off of the LED is manually performed by a switch 113 installed in the portable computer 100 and controlled from a utility program, etc., as well by an on/off control circuit provided inside a computer body 101.

公开(公告)号：JPH02211521A

公开(公告)日：1990-08-22

申请号：JP3114789

申请日：1989-02-13

Applicant: IBM JAPAN

Inventor： IIDA HIROYASU ,  KODAIRA FUMIYA ,  NISHIOKA YOSHIO ,  HAYATA MASAYUKI

IPC: G06F3/14 ,  G09G5/14 ,  G09G5/30

Abstract: PURPOSE:To load the large quantity of screen attribute data by reading the screen attribute data during a horizontal display period, setting them in a register with the use of a DMA function, and preventing character data from being displayed during the horizontal display period. CONSTITUTION:A bus controller 15 accesses a DMA row starting address in a row table area by a row table address signal in the last horizontal fly-back interval during a horizontal scanning fly-back interval. According to an accessed DMA row starting address, a DMA row in a display data area 9 is read in the horizontal display interval continuously after the horizontal fly-back interval. The screen attribute data on the read DMA row are supplied to the buffer of the controller 15, and supplied to a DMA controller 17 of a display controller 16 by a prescribed timing signal. The controller 17 DMA-transfered the set data and pallet data out of the supplied data respectively to an I/O register 18 and to the memory of a pallet mechanism 19.