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1. 发明专利

JPH10340070A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH10340070A
公开(公告)日：1998-12-22
申请号：JP15108097
申请日：1997-06-09
申请人： HITACHI LTD
发明人： NAKANO SHUICHI , IGARASHI YOICHI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/18
摘要： PROBLEM TO BE SOLVED: To reduce the number of frequencies of clock signals to be transmitted to driving means by generating N pieces of clock signals whose frequencies are the same and whose phases are different with each other and transmitting them to the N pieces of driving means groups which are respectively constituted of (M/N) pieces of driving means and also permuting a simple one line of display data to be inputted at the same time and transmitting them to M pieces of driving means. SOLUTION: Two clock signals whose frequency are the same frequency as that of display data and whose phases are different with each other and which have, for example, frequencies of 32.5 MHz are respectively transferred to drain drivers 130 (every other drain drivers 130) of A group of B group. Moreover, since the permuted display data are made to be transferred to respective drain drivers 130 via the bus lines 134 of one system, it is mode possible to transfer the two clock signals whose frequencies are the same and whose phase are different with each other for latching the display data from a display controller to the drain drivers 130 without broadening the bus width of the bus lines 134 of the display data.

2. 发明专利

JPH0944116A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0944116A
公开(公告)日：1997-02-14
申请号：JP18996595
申请日：1995-07-26
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： TSUCHIYA SHINICHI , OWAKU YOSHIHARU , IGARASHI YOICHI
IPC分类号： G02F1/133 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To provide technology which can reduce the area of a frame part by decreasing data lines for transferring display data to a dry driving circuit. SOLUTION: Of the liquid crystal display device equipped with a TFT liquid crystal display panel 101 which has a plurality of thin film transistors(TFT) provided in matrix, a drain driving circuit 104 which drives the drain signal line 108 of the TFT liquid crystal display panel 101, a signal converting circuit 102 which converts control signals and display data inputted from a computer part into the control signals and display data of the liquid crystal panel 101, and a transfer means 103 which transfers the display data outputted from the signal converting circuit 102 to the drain driving circuit 104, the transfer means 103 is equipped with a common transfer means which transfers display data of blue and red by a common data line and the drain driving circuit 104 is equipped with a data separating means which separates the display data transferred by the common data line into display data of blue and red.

3. 发明专利

JPH0756538A DRIVING METHOD FOR MATRIX TYPE DISPLAY DEVICE 失效
公开(公告)号：JPH0756538A
公开(公告)日：1995-03-03
申请号：JP20615293
申请日：1993-08-20
申请人： HITACHI LTD
发明人： KURIHARA HIROSHI , FUJII TATSUHISA , KOSHI HIROBUMI , MANO HIROYUKI , NISHITANI SHIGEYUKI , IGARASHI YOICHI
IPC分类号： G02F1/133 , G09G3/36
摘要： PURPOSE:To obtain good contrast in a driving method of STN liquid crystal having a high speed response. CONSTITUTION:This method is constituted with a memory means which stores display data of plural rows, a function generating means 22 which generates a driving function of a row electrode, an operation means which operates output of these means, a column electrode driving means 18 which drives a column electrode in accordance with an output of the operation means, and a row electrode driving means 24 which drives a row electrode in accordance with a row electrode driving function. Since an object to be calculated is only volume of several rows, small circuit scale of the memory means, the operation means and the like may be allowed. Also, voltage applied to a matrix is an average value in a period in which the driving function of the row electrode has values of 1 and -1, driving suitable for high speed response are obtained.

4. 发明专利

JPH075849A FLAT DISPLAY DEVICE 失效
公开(公告)号：JPH075849A
公开(公告)日：1995-01-10
申请号：JP16748193
申请日：1993-06-14
申请人： HITACHI LTD
发明人： IGARASHI YOICHI
IPC分类号： G02F1/133 , G02F1/136 , G02F1/1368 , G09G3/36
摘要： PURPOSE:To provide a flat display device which can drive a high definition flat display panel with a display control device having a simple constitution. CONSTITUTION:A clock pulse made high frequency being integral multiple of a transfer clock of display data is supplied to a signal line driver and a scanning line driver which drives a flat display panel, and a display control device which supplies a timing signal and display data required for its operation, data taken in by this clock pulse is spatially separated and display data is supplied to plural signal line drivers. Since the number of operations in the display control device increases by a increment proportional to in creased clock frequency, data of same numbers are partially separated synchronizing with an input data and they can be outputted by plural drivers.

5. 发明专利

JPH04181800A AIR CONDITIONING SYSTEM FOR ELECTRONIC DEVICE CONTAINING CHAMBER 失效
公开(公告)号：JPH04181800A
公开(公告)日：1992-06-29
申请号：JP30868490
申请日：1990-11-16
申请人： HITACHI LTD
发明人： SHINDO TAKANORI , TAKECHI TOSHIYUKI , IKENO MASAHIRO , IGARASHI YOICHI
IPC分类号： G12B15/04 , F24F1/00 , H05K7/20
摘要： PURPOSE:To properly feed chilled gas in a containing chamber, to uniformly cool electronic devices, and to further improve a volume efficiency and economy by providing a shielding plate between one side of a row of the devices and the sidewall of the chamber. CONSTITUTION:Two rows of electronic device trestles are deviated laterally to be disposed, and one ends of the rows are connected to the sidewalls of a containing chamber via shielding plates 61, 62. As a result, chilled gas of an air conditioner 51 is not introduced to the back of the row 22 of the trestle, and hence brought into direct contact with the front as indicated by arrows to be sucked from a suction port of the front of each device, and discharged through the device from an exhaust port of the back. Thus, the cooling efficiency of the device is enhanced, the devices can be substantially uniformly cooled at the same time. Accordingly, space utility ratio of the containing chamber is enhanced, and economy of an air conditioner system can be simultaneously enhanced.

6. 发明专利

JPH04163647A DISK MEMORY CONTROL DEVICE 失效
公开(公告)号：JPH04163647A
公开(公告)日：1992-06-09
申请号：JP28853290
申请日：1990-10-29
申请人： HITACHI LTD
发明人： KURIHARA HIROSHI , IGARASHI YOICHI
IPC分类号： G06F12/08 , G06F3/06
摘要： PURPOSE:To realize efficient data transfer by providing a buffer RAM monitor circuit to count the number of sectors transferred from a disk memory to a buffer RAM and detect that a count value reaches a prescribed number. CONSTITUTION:An HDD interface transfers data from the disk memory to the buffer RAM, and includes a disk memory control circuit. A buffer RAM control circuit accesses the buffer RAM by a control signal from the HDD interface, and writes the data to be transferred by a sector unit. Here, by providing the buffer RAM monitor circuit to count the sectors transferred from the disk memory to the buffer RAM and detect that the count value reaches the prescribed number, it is found out automatically that the objective sector was transferred to the buffer RAM on the basis of this timing. Thus, the objective sector can be efficiently transferred to a host system.

7. 发明专利

JPS63219193A MECHANISM OF OPENING AND CLOSING DOOR 失效
公开(公告)号：JPS63219193A
公开(公告)日：1988-09-12
申请号：JP5194987
申请日：1987-03-09
申请人： HITACHI LTD , HITACHI COMMUNICATION SYSTEM
发明人： IGARASHI YOICHI , NISHIMURA KIYOSHI
IPC分类号： H05K5/03

8. 发明专利

JP2001311933A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001311933A
公开(公告)日：2001-11-09
申请号：JP2000130649
申请日：2000-04-28
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： OWAKI YOSHIO , IGARASHI YOICHI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36 , G09G5/00
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device permitting to reduce a transfer frequency on a bus line when a display control device transfers display data containing ineffective display data to a driving circuit. SOLUTION: The liquid crystal display device is provided with the display control device which alternately sends display data for the odd-numbered driving circuits and display data for the even-numbered driving circuits to the plural driving circuits, and when the display control device sends the ineffective display data to at least one of the even-numbered driving circuits, it sends the effective display data for the odd-numbered driving circuits, which are positioned before the ineffective display data, as the ineffective display data.

9. 发明专利

JP2000338938A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2000338938A
公开(公告)日：2000-12-08
申请号：JP15262399
申请日：1999-05-31
申请人： HITACHI LTD
发明人： IGARASHI YOICHI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20
摘要： PROBLEM TO BE SOLVED: To fetch display data in a drain driver in a low clock frequency with an interface not adopting an LVDS system. SOLUTION: This device is equipped with a clock multiplying circuit PLL for multiplying by (a) the frequency of a clock signal CL inputted from a computer to an interface circuit, and with a parallel-serial conversion circuit for converting the number of display data to the number of (n) transferred from the computer into (m). The display data to the number of (m) is fetched in a drain driver with a double edge of a clock a×CL, in the relation between (m) and (n), expressed as m

10. 发明专利

JPH08122746A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH08122746A
公开(公告)日：1996-05-17
申请号：JP25642894
申请日：1994-10-21
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： UEDA SHIRO , KUMAOKA SHUNICHI , SASUGA MASUMI , SHIBATA KATSUHIKO , IGARASHI YOICHI , KOBAYASHI NAOTO
IPC分类号： G02F1/1335 , G02F1/133 , G02F1/13357 , G02F1/1345
摘要： PURPOSE: To make small the outermost shape of a liquid crystal display module on a sealing port side by providing a recessed part on a peripheral circuit board located at the outer peripheral part of the sealing port so as to evade the projected part of the sealing port and arranging the lamp cable of a fluorescent tube by circulating the periphery of four sides of a liquid crystal display element. CONSTITUTION: The liquid crystal display module consists of a shield case SHD, a display window WD, insulating spacers SPC1 to 4, folded multi-layer flexible circuit boards FPC1 to 3, an interface circuit board PCB, a liquid crystal display element ASB with driving circuit board, and the liquid crystal display element PNL in which a driving IC is loaded on the board on one side of two superimposed transparent insulating boards, and every member is superimposed and assembled with prescribed upper and lower relation. The peripheral circuit board located at the outer peripheral part of the sealing port is provided with the recessed part so as to evade the projected part of the sealing port. The lamp cable of a lengthy fluorescent tube is arranged in a space under the multi- layer flexible boards FPC1 to 3 packaged on the outer peripheral part of the liquid crystal display element by circulating the four sides.

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