公开(公告)号：CA2352693A1

公开(公告)日：2002-02-14

申请号：CA2352693

申请日：2001-07-05

Applicant: IBM

Inventor： KOBAYASHI MASAKI ,  TAKEDA YASUMASA ,  OGAWA HIDEKI ,  KATAOKA RIEKO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/34 ,  G09G3/36 ,  G09G5/00 ,  G06F1/30 ,  G09G3/00 ,  G09G5/10

Abstract: To provide a liquid crystal display apparatus and computer apparatus allowin g power consumption to be effectively reduced. The refresh rate of an LCD panel is changed as th e brightness of the LCD panel changes. When the brightness of the LCD panel is decreased, the refres h rate is also decreased. In addition, whether the power source of the apparatus is AC or D C is determined based on whether an AC adapter is attached or not. When the DC power source is use d, the brightness and refresh rate of the LCD panel is lowered with respect to when the AC power source is used.

公开(公告)号：JP2003195828A

公开(公告)日：2003-07-09

申请号：JP2001395280

申请日：2001-12-26

Applicant: IBM

Inventor： OGAWA HIDEKI ,  SAKAETANI TETSUYA ,  KATAOKA RIEKO ,  KOBAYASHI MASAKI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/32 ,  G09G3/36 ,  G09G5/00

Abstract: PROBLEM TO BE SOLVED: To provide a display device and information processor which enable a user to properly set easiness of viewing a screen and a trade-off for lower power consumption. SOLUTION: The display device 200 equipped with a panel 230 where pixels are arrayed in matrix comprises a mode setting part 240 for setting one of a plurality of display modes of the display device 200, a voltage supply part 250 which varies a driving voltage as a reference voltage for a voltage to be supplied to the panel 230 according to the display mode set by the mode setting part 240, a gate driver 260 which supplies a selection signal to a plurality of pixels arrayed in a column direction on the panel 230, and a source driver 270 which supplies a pixel driving voltage generated based on luminance data specifying the luminance of a plurality of pixels selected by the selection signal and the driving voltage to the plurality of selected pixels. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002062838A

公开(公告)日：2002-02-28

申请号：JP2000245963

申请日：2000-08-14

Applicant: IBM

Inventor： KATAOKA RIEKO ,  OGAWA HIDEKI ,  TAKEDA YASUMASA ,  KOBAYASHI MASAKI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/34 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device and a computer system by which power consumption can effectively be reduced. SOLUTION: A refresh rate is changed in accordance with the changing of the brightness of an LCD(liquid crystal display) panel, and when the brightness of the LCD panel is lowered, the refresh rate is changed. It is judged whether the power source of the display device is an AC power source or a DC power source by judging whether an AC adaptor is connected to the device or not, and when the power source of the device is the DC power source, the brightness and refresh rate of the LCD panel are lowered than those at the time the power source of the device is the AC power source.