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51. 发明专利

JPH03132849A CONTROL SYSTEM FOR IDENTIFICATION OF DMA CHANNEL 失效
公开(公告)号：JPH03132849A
公开(公告)日：1991-06-06
申请号：JP27044789
申请日：1989-10-19
申请人： FUJITSU LTD
发明人： MOTOYAMA HIDEYUKI , TAJIMA HIROTAKA
IPC分类号： G06F13/00 , G06F13/28
摘要： PURPOSE:To easily detect a specific character corresponding to a channel under a DMA even when the DMA is applied to the data on plural channels in response to these channels by identifying the channel under transfer of data based on the result of address comparison obtained via an address comparison part and informing a character detecting part of the identified channel. CONSTITUTION:A DMA control part 4 controls the transfer of data which is performed between a memory 2 and a communication control part 3 having plural channels via a bus 7 with no intervention of a processor 1. At the same time, a character detecting part 5 detects a specific character out of the data transferred. Then an address comparison part 6 compares the address corresponding to a channel where an area of the memory 2 is allocated in response to a channel with the address of the memory 2 set on the bus 7 which transfers the data under the control of the part 4. Thus a channel which is under transfer of data is identified based on the result of address comparison obtained by the part 6. Then the identified channel informed to the part 5. Thus it is possible to easily detect a specific character corresponding to a channel under DMA even when the DMA is applied to the data on plural channel in response to these channels.

52. 发明专利

JPH0374952A DATA TRANSMISSION/RECEPTION STOP MONITORING CIRCUIT 失效
公开(公告)号：JPH0374952A
公开(公告)日：1991-03-29
申请号：JP21062389
申请日：1989-08-17
申请人： FUJITSU LTD
发明人： TAJIMA HIROTAKA , MOTOYAMA HIDEYUKI
IPC分类号： H04L29/14
摘要： PURPOSE:To easily specify a line whose communication is interrupted by inputting the result of detection of interrupted communication to an OR circuit when a timer of each line and a status register detects the interrupted communication and using the output of the OR circuit to allow the firmware to reference the status register. CONSTITUTION:When a data input/output signal is inputted from each line, a timer 1 of each line is reset and when the timer is not reset for a prescribed time, an interruption signal is generated from the timer 1. An OR circuit 4 ORs status registers 3 and inputs the result to a firmware 5. Then the firmware 5 checks the content of the status registers 3, specifies a line with the interrupt caused therein and transits it to the interruption processing routine. The firmware 5 counts the number of times of interruption, resets the count when not consecutive and interrupts the line when a prescribed number or above of consecutive interruption takes place. Thus, the load of the firmware 5 is relieved.

53. 发明专利

JPH02237331A TRANSMISSION END SIGNAL RECOVERY DEVICE 失效
公开(公告)号：JPH02237331A
公开(公告)日：1990-09-19
申请号：JP5913589
申请日：1989-03-10
申请人： FUJITSU LTD
发明人： TAJIMA HIROTAKA , MOTOYAMA HIDEYUKI
IPC分类号： H04N1/32 , H04L1/08 , H04L29/14
摘要： PURPOSE:To recover an RTC signal automatically in a complete form even when part of the RTC signal is destroyed in a reception signal by recovering a transmission end signal in an input signal with a pattern signal from a pattern signal generating circuit in response to the detection of a consecutive pattern signal string. CONSTITUTION:A pattern signal generating circuit 21 generating a pattern signal EOL consecutively is provided in a transmission end signal recovery device recovering the transmission end signal (RTC) comprising N-set of consecutive prescribed pattern signal (EOL horizontal synchronizing signal) strings included in an input signal. Moreover, a consecutive pattern signal string detection circuit 22 detecting strings of consecutive pattern signals less than N from the input signal and a recovery circuit 23 recovering the transmission end signal in the input signal with a pattern signal from the pattern signal generating circuit 21 in response to the detection of the consecutive pattern signal string by the consecutive pattern signal string detection circuit 22 are provided. Thus, the transmission end signal is recovered automatically in a complete form and the reliability of communication service is improved.

54. 发明专利

JPS63185153A LINE CONNECTING SYSTEM IN COMMUNICATION TERMINAL 失效
公开(公告)号：JPS63185153A
公开(公告)日：1988-07-30
申请号：JP1671187
申请日：1987-01-27
申请人： FUJITSU LTD
发明人： MOTOYAMA HIDEYUKI
IPC分类号： H04M11/00
摘要： PURPOSE:To arbitrarily select the external modems of various types of line specifications and to execute a data communication with an information center by providing a telephone line connecting terminal, the line connecting terminal of the external modem and an exclusive line connecting terminal in a communication terminal. CONSTITUTION:When relays 11 and 13 are turned off, an internal modem 2 is connected to the telephone line side through relays 9-11 and the terminals N1, N2 and the external modem is connected to the exclusive line side through the terminals P1, P2. When the relays 11 and 12 are turned on, the internal modem 3 is connected to the exclusive line side through the terminals P1, P2 and the external modem is connected to the telephone line side through the relays 9-11 and the terminals N1, N2. Such a line switching function is provided and a general purpose interface is disposed in the terminal side, thereby, the external modems of the various types of the line specifications can be connected.

55. 发明专利

JPS6010325A KEY SCANNING SYSTEM 失效
公开(公告)号：JPS6010325A
公开(公告)日：1985-01-19
申请号：JP11889583
申请日：1983-06-30
申请人： FUJITSU LTD
发明人： KUNIMOTO YASUHIRO , MIZUI KENJI , MOTOYAMA HIDEYUKI
IPC分类号： H03M11/00 , G06F3/023 , H03M11/20
摘要： PURPOSE:To improve the reliability by discriminating it as the presence of key input when the key input is detected as absence, presence, and presence. CONSTITUTION:Presence/absence information of key switch depression is inputted to a shift register SR (0) at each prescribed time, and the shift register is shifted from (0) to (2) in order. Thus, the oldest information is stored in the (2) and the newest information is stored in the (0). Since the shift registers SR (0) and (1) are connected to inputs of an AND logic circuit LG1, when they are both logical 1, an exclusive OR circuit LG2 goes to logical 1. Since other input of an exclusive OR LG2 is connected to the shift register SR (2), when this input is logical 0, logical 1 is outputted to an output OUT. Thus, when the key input is present, the key input just before is present and further, the preceding key input is absent, then the output terminal OUT goes to logical 1.

56. 发明专利

JPS58112196A ABNORMAL ACTION DETECTION SYSTEM 失效
公开(公告)号：JPS58112196A
公开(公告)日：1983-07-04
申请号：JP20906781
申请日：1981-12-25
申请人： FUJITSU LTD
发明人： MOTOYAMA HIDEYUKI , OOGUCHI AKEMI
IPC分类号： H04Q9/00 , G08C25/00

57. 发明专利

JP2003114414A LIQUID CRYSTAL DISPLAY DEVICE TO BE USED IN ELECTRONIC EQUIPMENT 审中-公开
公开(公告)号：JP2003114414A
公开(公告)日：2003-04-18
申请号：JP2001310092
申请日：2001-10-05
申请人： FUJITSU LTD
发明人： HARA YASUSHI , MURAKAMI KEIICHI , YAMADA HIROSHI , MOTOYAMA HIDEYUKI , ARITAKE TAKAKAZU , YOSHIHARA TOSHIAKI , TADAKI SHINJI
IPC分类号： G02F1/13357 , F21V8/00 , F21Y101/02 , F21Y103/00 , G02F1/133 , G09G3/20 , G09G3/34 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To realize a liquid crystal display device capable of selecting an efficient light source for back-light according to the brightness required, and to realize an electronic equipment having such a display device. SOLUTION: A back-light device (100) for a light-transmission type liquid crystal display device includes a plurality of light sources consisting of cold- cathode tubes (10) and LEDs (30), a liquid crystal panel (54), and a light- transmission plate (50) for emitting the light of a light source made incident form a certain surface to the liquid crystal panel through another surface. Controllers (72, 74, 76) for the back-light device (100) selects at least one light source from among the cold-cathode tubes and LEDs according to the brightness required and decides the brightness to operate.

58. 发明专利

JP2000269999A INTER-NETWORK COMMUNICATION SYSTEM 失效
公开(公告)号：JP2000269999A
公开(公告)日：2000-09-29
申请号：JP7480699
申请日：1999-03-19
申请人： FUJITSU LTD
发明人： NISHIKAWA HIROSHI , MOTOYAMA HIDEYUKI , SUZUKI AYAKO
IPC分类号： H04L1/22 , H04L12/42 , H04L12/66 , H04L29/08 , H04L29/14
摘要： PROBLEM TO BE SOLVED: To conduct transparent communication by containing a LAN interface so as to effectively utilize frequency band. SOLUTION: A network interface accommodation means 11 contains a network communication interface. A traffic monitor means 12 monitors the traffic of a network. A band information storage means 13 stores band information. A band assignment control means 14 dynamically assigns a frequency band, on the basis of the traffic and the band information in the case of giving data generated in one network N1 to the other network N2. A communication control means 15 conducts communication control to interconnect the one network N1 and the other network N2 through the assigned frequency band.

59. 发明专利

JP2000235437A DEVICE AND METHOD FOR SAVING ELECTRIC POWER OF ELECTRONIC EQUIPMENT 失效
公开(公告)号：JP2000235437A
公开(公告)日：2000-08-29
申请号：JP3854499
申请日：1999-02-17
申请人： FUJITSU LTD
发明人： YOSHIMOTO SHINICHI , YAMADA HIROSHI , MOTOYAMA HIDEYUKI , FUTAMURA KAZUAKI , TANAKA HIDEKI
IPC分类号： G06F1/32 , G06F1/26
摘要： PROBLEM TO BE SOLVED: To efficiently save the electric power of electronic equipment by setting a time-out time according to reset cycles specified by a reset cycle setting means. SOLUTION: A reset factor accepting means 22 receives event inputs from respective parts of a PC main body and outputs signals indicating that to a reset cycle setting means 23 and a timer reset means 24. The reset cycle setting means 23 calculates event generation cycles and sets them as reset cycles and a time-out time setting means 25 sets a time-out time according to the inputted reset cycles. A comparing means 26 compares the elapsed time inputted from a timer 21 with the time-out time inputted from the time-out time setting means 25. An operation mode setting means 27 determines whether the respective parts of the equipment are placed in normal operation mode or power-saving mode according to the comparison result inputted from the comparing means 26.

60. 发明专利

JPH11185564A KEY SWITCH, KEYBOARD AND INFORMATION PROCESSOR USING THESE 失效
公开(公告)号：JPH11185564A
公开(公告)日：1999-07-09
申请号：JP35268997
申请日：1997-12-22
申请人： FUJITSU LTD
发明人： WATANABE GORO , MOTOYAMA HIDEYUKI
IPC分类号： G06F3/02 , H01H13/06 , H01H13/52 , H01H13/70 , H01H13/702
摘要： PROBLEM TO BE SOLVED: To provide a new portable information processor, capable of eliminating the need for an opening larger than a key top in a keyboard surface panel and preventing the entry of dust inside from a gap to the opening, without marring the beautiful appearance of the processor. SOLUTION: The protruded top of the inversely U-shaped elastic body of a key switch has a boss at the center and shoulders at the front and rear sides of the boss. The shoulder on the rear side is lower than the shoulder at the front side and has an inclination on the rear side of the boss. The recessed engagement of the key top 7 of the key switch has a hole at the center and droops on the front and rear sides of the hole. The droop on the rear side is lower than the droop on the front side. In the condition that the protruded top of the elastic body 8 is combined with the recessed engagement of the key top 8, the shoulder on the front side contacts with the droop on the front side and the shoulder on the rear side contacts with the droop on the rear side.

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