-
公开(公告)号：DE69405831D1
公开(公告)日：1997-10-30
申请号：DE69405831
申请日：1994-07-29
Applicant: IBM
Inventor： KOBAYASHI MASAKI , KATAOKA RIEKO , NAITOH MASAHIRO
Abstract: A display device controller has digital RGB colour signal lines and horizontal and vertical sync signal lines (7, 8). NAND gates (9) detect in respect of at least one of the RGB colour signal lines when the digital signal on that line corresponds to a black level, and a D/A converter (10) and an adder (+) add to at least one of the horizontal and vertical sync signal lines a signal corresponding to the black level signal so detected.
-
公开(公告)号：DE69306297D1
公开(公告)日：1997-01-16
申请号：DE69306297
申请日：1993-04-19
Applicant: IBM
Inventor： KOBAYASHI MASAKI , KATAOKA RIEKO
-
3.发明专利
公开(公告)号：JP2003114648A
公开(公告)日：2003-04-18
申请号：JP2001303477
申请日：2001-09-28
Applicant: IBM
Inventor： KATAOKA RIEKO , TAKEDA YASUMASA , KOBAYASHI MASAKI , KIYOTANI YOSHIMASA
Abstract: PROBLEM TO BE SOLVED: To reduce the power consumption of a liquid crystal display device by shortening a frame cycle for replotting picture display in an LCD (liquid crystal display) panel and lowering the operating frequency of the LCD panel. SOLUTION: This display device is provided with an LCD panel 11 and a graphic controller 13 controlling display in the LCD panel 11. When the suppressing of power consumption is performed in the display device, the graphic controller 13 shortens the frame cycle while fixing a refresh rate as it is by shortening a non-display cycle at the time of replotting a picture.
-
公开(公告)号：JPH0744147A
公开(公告)日：1995-02-14
申请号：JP18968293
申请日：1993-07-30
Applicant: IBM
Inventor： KOBAYASHI MASAKI , KATAOKA RIEKO , NAITO MASAHIRO
Abstract: PURPOSE: To provide a means for exactly displaying black at a place where black should be displayed, and displaying a further clear color picture in the display device of a computer. CONSTITUTION: This controller for a display device is connected with a display device through R, G, and B color information signal lines 4, and horizontal and vertical synchronizing signals 7 and 8, is provided with a means 9 for fetching a black information signal in which N bits are defined as a prescribed pattern from at least one of the R, G, and B color information signal lines 4 constituted of N bit digital signals, and a means for superimposing the fetched black information signal on at least one of the horizontal and vertical synchronizing signals 7 and 8.
-
公开(公告)号：JPH05252408A
公开(公告)日：1993-09-28
申请号：JP32023091
申请日：1991-12-04
Applicant: IBM
Inventor： KATAOKA RIEKO , KOBAYASHI MASAKI
Abstract: PURPOSE: To minimize variation in high voltage on the output line of a flyback transformer by using compensation voltage pulses of a 2nd frequency higher than a 1st frequency supplied to the flyback transformer. CONSTITUTION: A control circuit 2 is triggered with a horizontal synchronizing pulse and its output is sent to a horizontal deflecting circuit 3, whose output passes through the flyback transformer FBT 11 and a diode 13 to charge a smoothing capacitor 12, so that a high DC voltage is generated on an output line 14 and supplied to the anode 15 of a CRT. Pulses of 70kHz are made into a pulse train 140kHz by a multiplexing circuit 17 and the pulse train is applied to a compensation circuit 18. The circuit 18 responds to an error signal from an error detector 21 and a compensation voltage is applied to a point 28 between capacitors 12 and 20 through a transformer 19. An LPF 29 is connected to the point 28 and FBT 11 and the compensation voltage is applied to the FBT 11.
-
Patent Agency Ranking6.发明专利Information processor, display control method of liquid crystal display device, program for executing the display control method, and information processor in which adjustment effect of viewing angle width is improved 有权信息处理器，液晶显示装置的显示控制方法，用于执行显示控制方法的程序和改善视角的调整效果的信息处理器被改进
公开(公告)号：JP2006208575A
公开(公告)日：2006-08-10
申请号：JP2005018326
申请日：2005-01-26
Applicant: Internatl Business Mach Corp
, インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Inventor： INOUE KOJI , KODATE MANABU , ISHII KEITA , KATAOKA RIEKO
CPC classification number: G09G3/3611 , G09G5/06 , G09G2320/028 , G09G2320/0285 , G09G2320/068
Abstract: PROBLEM TO BE SOLVED: To provide an information processor in which adjusting effect of a viewing angle width is improved by controlling gradation of a liquid crystal display (LCD) device, a display control method, and a program for executing the display control method with which a viewing angle characteristic is controlled.
SOLUTION: The information processor includes second software for forwarding display control of the LCD panel from a CPU 12 to first software after receiving a display mode change instruction, and a plurality of display control table 38 in which color pallet data of less than 128 gradation levels are allocated with degeneration for a higher gradation level. From an identification data of the LCD panel which is acquired by the first or the second software to which the control is forwarded, a degeneration color conversion table corresponding to the identification data is retrieved. A display adapter 30 reads out the degeneration color conversion table retrieved from a display control table storing section 36 to a look-up-table (LUT) reading section 40 and generates an RGB signal in which the gradation is degenerated.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：提供一种信息处理器，其中通过控制液晶显示器（LCD）装置的等级来提高视角宽度的调整效果，显示控制方法和用于执行显示控制的程序 控制视角特性的方法。 解决方案：信息处理器包括第二软件，用于在接收到显示模式改变指令之后将CPU面板的LCD显示控制转发到第一软件;以及多个显示控制表38，其中彩色托盘数据小于 128级灰度级别被分配用于较高灰度级的退化。 从由控制转发到的第一软件或第二软件获取的LCD面板的识别数据，检索对应于识别数据的退化颜色转换表。 显示适配器30将从显示控制表存储部分36检索的退化颜色转换表读出到查找表（LUT）读取部分40，并产生灰度退化的RGB信号。 版权所有（C）2006，JPO＆NCIPI
-
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
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
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.
-
公开(公告)号：JPH06225176A
公开(公告)日：1994-08-12
申请号：JP31982392
申请日：1992-11-30
Applicant: IBM
Inventor： IDEI SEIICHI , KATAOKA RIEKO , KOBAYASHI MASAKI
Abstract: PURPOSE: To lower the source voltage of a final-stage amplifier, to reduce heat generation and electromagnetic wave radiation, and to improve the reliability by performing cutoff adjustment, luminance adjustment, etc., of a CRT by a clump circuit which is separated from the final-stage amplifier in term of direct current. CONSTITUTION: The source voltage B1 of the final-stage amplifier 5 is only high enough to secure the dynamic range needed for the reference DC level of an analog video signal after amplification and the analog video signal to be amplified. Then the cutoff adjustment of the CRT is made by applying a DC voltage to the base (C point) of a transistor 28 by a variable resistor 26 and the luminance adjustment of the CRT screen is made by applying a control voltage to the base (A point) of a transistor 27. Eventually, the cutoff adjustment, luminance adjustment, etc., of the CRT are made by controlling the clamp voltage of the clamp circuit 19 separated from the final-stage amplifier 5 in terms of direct current. Therefore, the source voltage of the final-stage amplifier 5 is reducible approximately to a half as high as usual.
-
公开(公告)号：JPH06208331A
公开(公告)日：1994-07-26
申请号：JP32005992
申请日：1992-11-30
Applicant: IBM
Inventor： KATAOKA RIEKO , KOBAYASHI MASAKI
Abstract: PURPOSE: To control the luminance of information on a screen whose luminance is adjusted by contrast adjustment so that it does not exceed prescribed maximum luminance when background luminance is increased by brightness adjustment, to prevent the fluctuation of background luminance and to hold gradation luminance information. CONSTITUTION: The signal amplification rate of an input video signal is adjusted by a contrast adjustment variable resistor 4. The black level of white luminance at the background is adjusted by a brightness adjustment variable resistor 11. A transmission conversion circuit 12 receives adjustment values by the variable resistors 4 and 11 as inputs, and generate two values with the adjustment values as parameters. It is detected whether the total value of the two values exceeds a prescribed value corresponding to maximum luminance which is previously decided on the display screen. When it does not exceed the value, contrast is not readjusted. When it exceeds the value, the amplification rate of the amplifier 3 is reduced so that the maximum luminance of the video signal does not exceed the maximum luminance level of CRT, which is previously decided.
-
-
-
-
-
-
-
-
-
Search Results
20
records
(took 0.019 seconds)
