COMPUTER-SYSTEM AND SYSTEM EXTENSION DEVICE

    公开(公告)号:JPH0635825A

    公开(公告)日:1994-02-10

    申请号:JP16585892

    申请日:1992-06-24

    Applicant: IBM

    Abstract: PURPOSE: To connect a wired OR signal line without interlocking in a bus connection device connected to the bus of an extension box or the other system through a signal transmission line whose signal form is different from the bus. CONSTITUTION: Substitution mechanisms 46 substituting the level of the wired OR signal line 51 of the other bus are provided for respective systems. The level of the signal line 51 is transmitted to the substitution mechanism 46 of the other system through a channel. When the substitution mechanism 46 is in a prescribed level, the system prevents the level of the signal line 51 from being transmitted to the other system. Thus, it is avoided that the transmission of the level avoids the continuation of echoing between the systems, and interlocking is released. Re-substitution mechanisms 47 making the mirror images of the substitution mechanisms of the other systems are provided for both systems. A prescribed level is transmitted to the substitution mechanism 47 of the other system based on the non-matching of the level of the re-substitution mechanism 47 with the level of the signal line 51 of the system.

    IMAGE TRANSFORMING METHOD, IMAGE PROCESSING APPARATUS AND IMAGE DISPLAY DEVICE

    公开(公告)号:JP2001251500A

    公开(公告)日:2001-09-14

    申请号:JP2000050049

    申请日:2000-02-25

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To obtain clear enlarged or reduced images without damaging the rough shape of a font, etc., with respect to a graphic picture including many step edges such as fine lines handled by an information display such as an LCD panel and a projector. SOLUTION: This image processing apparatus for generating transformed image data by performing resolution conversion that enlarges/reduces original image data into a multiple of a rational number or an integer is provided with an original image data inputting part 11 for inputting the original image data, an algorithmic nonlinear processing part 12 for generating first transformed image data maintaining a connection relation to line width held by the inputted original image data even after the resolution conversion, a multiage processing part 13 for generating second transformed image data subjected to resolution conversion in the direction of maintaining the rough shape of the line width with respect to the inputted original image, and a synthesizing part 15 for combining the generated first transformed image data and the generated second transformed image data on the basis of the weighting by a weight deciding part 14.

    LIQUID CRYSTAL DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY DRIVING CIRCUIT, DRIVING METHOD FOR LIQUID CRYSTAL DISPLAY, AND PROGRAM

    公开(公告)号:JP2002351409A

    公开(公告)日:2002-12-06

    申请号:JP2001154531

    申请日:2001-05-23

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To improve color shifting, blur and tail draw and the like which appear in the scroll of a text, the dragging of an icon, a CG(computer graphic) animation and a moving video and the like which are displayed on an LCD(liquid crystal display). SOLUTION: This circuit is a liquid crystal display driving circuit which is provided with a capacitance estimating part 12 estimating capacitance values to which respective pixels reach after one refresh cycle at the time of applying a prescribed voltage to the pixels with respect to target luminance, a frame buffer 13 storing the capacitance values estimated by the capacitance estimating part 12 and an over drive voltage calculating part 11 calculating voltages to be applied to the respective pixels based on target luminance posterior to one refresh cycle and the capacitance values stored in the frame buffer 13.

    COMPUTER AND ITS SYSTEM RECONSTITUTING DEVICE AND METHOD

    公开(公告)号:JPH10260929A

    公开(公告)日:1998-09-29

    申请号:JP17711897

    申请日:1997-07-02

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide the computer system which enables an adapter, etc., to be mounted and dismounted even in a system operation state and can automatically reconstituting system constitution according to the mounting and dismounting of the adapter etc. SOLUTION: When the adapter 2 is mounted, an adapter detecting mechanism 11 informs a resource manager of the mounting of the adapter 2 by interruption etc. The resource manager connects the adapter 2 to the system mechanically and electrically right after the adapter 2 is mounted and reads attribute information on the adapter 2 out of the memory in the adapter 2 to make a necessary setup and the installation of a device driver and the allocation of a memory, etc., needed on the system side so that an application program can use the adapter 2. When the user wants to dismount the adapter, the user sends an adapter removal request to the resource manager with an adapter removal button 12 or by a program.

    DISPLAY CONTROLLER
    16.
    发明专利

    公开(公告)号:JPH0287188A

    公开(公告)日:1990-03-28

    申请号:JP23850288

    申请日:1988-09-22

    Abstract: PURPOSE:To display an image plane consisting of an optional number of lines than the number of display liens of a display device at an optional vertical position on a display panel at all times by providing a means which generates a signal for varying and setting the number of blank feeding shift clock pulses, feeding lines with the blank feeding shift clock, and making no display in the blank feeding period. CONSTITUTION:A generation part 60 for a horizontal synchronizing signal as an interface signal to a matrix display device consists of a generating circuit 61 for the blank feeding shift clock, a generating circuit 62 for pulses of frequency which is an (n) times as high as a horizontal synchronizing signal, and a kick circuit 63 for the generating circuit 61. In this case, lines are fed on the display device by as many as the blank feeding shift clock pulses in the blank feeding period and no display is made throughout the period. For the purpose, this blank feeding period is so set that when the number of lines on the image plane is smaller than that of the display panel, parts of unnecessary lines at the upper and lower part of the display panel are fed in blank, thereby displaying the image plane in the center. Further, the image plane can easily be displayed at an optical desired vertical position.

    METHOD AND DEVICE FOR CONVERTING GRAY SCALE

    公开(公告)号:JPH0285889A

    公开(公告)日:1990-03-27

    申请号:JP23629088

    申请日:1988-09-22

    Applicant: IBM JAPAN

    Abstract: PURPOSE:To facilitate the conversion, and also, to hold sequence and magnitude of a relative luminance of M pieces of gradations by specifying a relation of K, M and N, in the case of converting arbitrary M pieces of gradations of a K gradation gray scale to an N gradation. CONSTITUTION:A gray scale converter is formed by a first table Tin and a second table Tout. The table Tin is a processing table for generating the table Tout, and mapped to an N gradation having sequence and magnitude of M pieces of gradation relative luminances in a K gradation. Subsequently, the contents of the table Tin are allowed to correspond to the K gradation, and mapped to the table Tout. In this case, when there is a condition of K>N>=M, the conversion corresponds to one-to-one and executed easily. Also, even when a CRT controller can use only an arbitrary N gradation in the K gradation, a display can be executed on a panel PDP.

    Liquid crystal display device, liquid crystal display drive circuit, driving method of the liquid crystal display and program therefor
    19.
    发明专利
    Liquid crystal display device, liquid crystal display drive circuit, driving method of the liquid crystal display and program therefor 审中-公开
    液晶显示装置,液晶显示驱动电路,液晶显示器的驱动方法及其程序

    公开(公告)号:JP2003029713A

    公开(公告)日:2003-01-31

    申请号:JP2001207112

    申请日:2001-07-06

    Abstract: PROBLEM TO BE SOLVED: To suppress a color slippage occurring when a region having a sharp boundary is slipped on a liquid crystal display(LCD) and to improve an abnormal color visibility at the boundary portion being moved.
    SOLUTION: An overdrive controller driving the LCD is provided with a changing rate Rst computing section 21 which comprehends the transition state from the current luminance of R, G and B subpixels to target luminance, a selecting section 22 which selects a subpixel having slowest transition and other subpixels from among the comprehended transition state, an overdrive voltage computing section 11 which computes a voltage to accelerate luminance transition for the subpixel having the slowest transition, an effective luminance Yst' computing section 16 which computes the voltage to accelerate or decelerate the luminance transition for cooperation with respect to selected other subpixels and a Yst' overdrive voltage computing section 17, and supplys a supply voltage by switching with a switch (SW) 23.
    COPYRIGHT: (C)2003,JPO

    Abstract translation: 要解决的问题:当在液晶显示器(LCD)上滑动具有尖锐边界的区域时,抑制发生的颜色滑动,并改善在移动边界部分处的异常颜色可视性。 解决方案:驱动LCD的过驱动控制器设置有变化率Rst计算部分21,它将过渡状态从R,G和B子像素的当前亮度理解为目标亮度;选择部分22,其选择具有最慢转变的子像素;以及 从理解过渡状态的其他子像素,计算用于加速具有最慢转变的子像素的亮度转换的电压的过驱动电压计算部11,计算用于加速或减速亮度转换的电压的有效亮度Yst'计算部16 用于与所选择的其他子像素和Yst'过驱动电压计算部分17的协作,并且通过与开关(SW)23切换来提供电源电压。

    METHOD AND COMPUTER FOR LOWERING FREQUENCY OF VIDEO CLOCK

    公开(公告)号:JPH11296128A

    公开(公告)日:1999-10-29

    申请号:JP7183098

    申请日:1998-03-20

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To change the frequency of a video clock so as not to affect display quality by providing a step of lowering the frequency of the video clock and a step of repeating this step until the changed frequency of the video clock becomes a prescribed frequency. SOLUTION: First of all, the timing to change the frequency of the video clock (Vclk) is detected (S110). Next, it is judged from the name of an application on a window displayed on a screen whether the frequency of Vclk is changed or not (S120). Next, when changing the frequency of Vclk, there are the cases of increasing and decreasing the frequency and corresponding to the cases, processing is made different (S130). Therefore, it is reported to a user to lower the frequency of Vclk (S140). Then, processing for actually lowering the frequency of Vclk is executed (S150), it is judged whether or not processing is finished and when not finished, it is returned to S110 again (S170).

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