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1. 发明专利

JPH1090377A METHOD FOR DETECTING SERVICE LIFE OF BATTERY 失效
公开(公告)号：JPH1090377A
公开(公告)日：1998-04-10
申请号：JP24178896
申请日：1996-09-12
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： NAKANO KENJI , SAKAI YASUO , SUZUKI TETSUYA
IPC分类号： G01R31/36 , H01M6/50 , H01M10/48
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of power cut-off caused by continuous load switching by discriminating the operable state at each load based on the voltage variation of the battery detected at the time of switching the loads. SOLUTION: A timer circuit A 102 periodically sends a battery voltage detection requesting signal 112 to a battery voltage detecting circuit 101 and a storage circuit 111. The circuit 101 detects the voltage of a battery and sends the detected voltage to an arithmetic circuit 109 in the period of the signal 112. The circuit 11 sends the terminating voltage level to the circuit 109 when a light load 104 is continuously executed. The circuit 109 compares the detected voltage of the battery with the terminating voltage level and, when the former is higher, continues the execution of the load 104. When the detected voltage is lower, the circuit 109 stops the execution. When the detected voltage is higher, the circuit A 102 generates the signal so as to repeat the same process after a fixed period of time and, when the detected voltage becomes lower than the terminating voltage level, the execution of the load 104 is stopped. Even for a normal load 105 and a heavy load 106, the residual capacity of the battery is completely consumed by performing similar processing at each terminating voltage level.

2. 发明专利

JPH1039966A INFORMATION PROCESSOR 失效
公开(公告)号：JPH1039966A
公开(公告)日：1998-02-13
申请号：JP18918796
申请日：1996-07-18
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , MATSUO TOSHIHIRO , EGUCHI TOSHIYA , SUZUKI TETSUYA
IPC分类号： G06F3/00 , G06F11/32 , G06F13/00 , H04B10/07 , H04B10/11 , H04B10/112 , H04L12/28 , H04W24/00 , H04W84/10 , H04W84/12 , H04W88/02 , H04B10/10 , H04B10/105 , H04B10/22
摘要： PROBLEM TO BE SOLVED: To display information for judging the communication state by detecting the reception intensity of received signals at a connection part for communication and displaying the detected reception intensity at a display part. SOLUTION: At the time of receiving reception optical signals 100, a light receiving part 14 inside the connection part 10 for optical communication performs conversion to electric signals 101 for indicating a current value corresponding to the optical signal intensity of the reception optical signals 100 and outputs them to an information conversion part 15 and an external reception light intensity detection part 11. The information conversion part 15 converts the electric signals 101 to the reception information signals 102 of a digital form and a reception information storage part 12 stores the information contents in the storage medium of a memory or the like. The reception light intensity detection part 11 inputs the electric signals 101, detects the reception light intensity and decides an intensity level and a monitor part 13 displays the information of a reception light intensity level by an indicator 16. Thus, a user easily recognizes the degree of the reception light intensity at a present communication position.

3. 发明专利

JPH09120333A POSITION READER 失效
公开(公告)号：JPH09120333A
公开(公告)日：1997-05-06
申请号：JP27802395
申请日：1995-10-25
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , TSURETA YUTAKA , SUZUKI TETSUYA
IPC分类号： G06F3/041 , G06F3/03 , G06F3/033
摘要： PROBLEM TO BE SOLVED: To make a precise coordinate read by greatly relaxing restrictions on the detection timing of a depression position on a tablet arranged on a screen and greatly shortening the time spent by a CPU for the detection, and adjusting how to apply a voltage for the coordinate read from the tablet and reducing the power consumption for that. SOLUTION: This device consists of the tablet 2 consists of a horizontal transparent resistance film 30 and a vertical transparent resistance film 29 and a pen state recognizing circuit 45 as an input means. After coordinate data are generated by pen depression, pen-up motion is recognized by a pen state recognizing circuit 45 and a pen state signal is sent to a CPU 1 to perform an ineffective data discarding process, thereby making the precise position read.

4. 发明专利

JPH08328874A CONTROL SYSTEM FOR CPU OPERATING STATE 失效
公开(公告)号：JPH08328874A
公开(公告)日：1996-12-13
申请号：JP13679095
申请日：1995-06-02
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： ISHIHARA TAKESHI , MATSUMIYA SATOSHI , OKUHAMA MASASHI , SUZUKI TETSUYA
IPC分类号： G06F1/04 , G06F9/46 , G06F9/48
摘要： PURPOSE: To decide the interruption requests generated from plural factors in terms of hardware and to process these requests regardless of the state of a CPU. CONSTITUTION: The interruption request signals A, B and C generated from a power switch 3, an input device and a clock having an alarm function are supplied to the corresponding interruption processing request terminals 7a, 7b and 7c of a CPU 7 via a processing request control circuit 6. At the same time, an OR circuit 6a of the circuit 6 generates an interruption processing request signal D from the signals A to C. The signal D is supplied to a start trigger terminal 7d of the CPU 7. Then the priority is set among terminals 7a to 7d, and the terminal 7d has the highest priority. When one of signals A to C is produced, the signal D is always produced. The CPU 7 is set in its operating state by the signal D and performs the interruption processing of signals A to C respectively.

5. 发明专利

JPH1148567A PRINTER 失效
公开(公告)号：JPH1148567A
公开(公告)日：1999-02-23
申请号：JP12033498
申请日：1998-04-30
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： TATEUCHI TSUGUJI , SUZUKI TETSUYA
IPC分类号： B41J19/18
摘要： PROBLEM TO BE SOLVED: To adequately printing even when a carriage is moved by an incorrect operation. SOLUTION: This printer comprises a platen 4, a carriage 3 moving in parallel to an axis direction of the platen, a printing head 2 mounted on the carriage 3 and a printing control device 11 for controlling the above components. It further comprises a home position detecting means 13 for detecting the carriage 3 when it is on the home position and a driving signal generating means 9 that generates a driving signal for moving the carriage to a side of the home position. As a result of the structure, the carriage 3 is returned to the home position before starting the printing and the position thereof can be confirmed.

6. 发明专利

JPH08314634A DISPLAY INTEGRATED TYPE POSITION READER 失效
公开(公告)号：JPH08314634A
公开(公告)日：1996-11-29
申请号：JP11485595
申请日：1995-05-12
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , TSURETA YUTAKA , SUZUKI TETSUYA , SHIOBARA TAKESHI
IPC分类号： G06F3/041 , G06F3/03 , G06F3/033 , G06F3/048
摘要： PURPOSE: To improve detection precision by greatly relieving the restrictions of the detection timing of a depression position on a tablet arranged on a screen. CONSTITUTION: When the screen of a liquid crystal display device is regarded as a display area 101, a position read area 102 for detecting a depression position on the tablet is assumed outside the display area 101, and the scanning time of those display area 101 and position read area 102 is set to one frame. On the screen of the liquid crystal display device, an image is displayed when the display area 101 is scanned. To display this image, the liquid crystal display device uses display control signals such as a display data transfer signal 103 and a horizontal scanning signal 104, but in a period of the position read area 102, a position read period signal which becomes low in level in this period is generated to mask the display control signals so that they are not supplied to the liquid crystal display device. Consequently, a noise due to the level inversion of the display control signals is not generated in the period of the position read area 102.

7. 发明专利

JPH08137444A LIQUID CRYSTAL MULTISCAN DISPLAYING METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JPH08137444A
公开(公告)日：1996-05-31
申请号：JP27739694
申请日：1994-11-11
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： KASAI SHIGEHIKO , WAKIZAKA SHINJI , SATO HIROKO , SUZUKI TETSUYA , HAMADA TATSUZO , IIJIMA KANAME
IPC分类号： G02F1/133 , G09G1/16 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/26 , G09G5/391
摘要： PURPOSE: To display display information of former resolution without injuring by operating the gradation data of the display data and displaying them with second resolution. CONSTITUTION: This device is provided with a personal computer(PC) 1 loading a central processing unit (CPU) 101, etc., a data conversion part 4 converting the display data 2 of the PC 1 into a signal for liquid crystal display and a liquid crystal panel 7. Then, a horizontal direction data conversion means performs operational processing for the gradation data of plural continuous display dots so that the display data of m dots sent from the PC 1, etc., are matched with the resolution of a liquid crystal display device, and it converts them to the display data of n dots (m≠n). Further, a vertical direction data conversion means performs operational processing for the adjacent display data of i lines sent from the PC 1, and it forms the display data of j lines (j

8. 发明专利

JPH1091341A POSITION READING DEVICE 失效
公开(公告)号：JPH1091341A
公开(公告)日：1998-04-10
申请号：JP24738196
申请日：1996-09-19
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , RENDA YUTAKA , SUZUKI TETSUYA
IPC分类号： G06F3/041 , G06F3/033
摘要： PROBLEM TO BE SOLVED: To completely prevent noise against a tablet and to read a position with a high accuracy by setting a position read period to convert an output signal of a tablet into position information out of a display period of a display device and fixing a level of a voltage that is applied to a display panel in a position read period. SOLUTION: A position read period generation circuit 9 supplies a position read period signal 108 of a low level to a signal fixing circuit 8 and a period notification circuit 10. A CPU 1 can recognize the start of a position read area by a position read notification signal 109 that is supplied from the circuit 10 even while the CPU 1 is carrying out another process. When the circuit 8 fixes the levels of a display data transfer signal and a horizontal scan signal in a scan period of the position read area, the horizontal scan signal never produces its level change point nor the change point of a liquid crystal alternating signal. Therefore, the noise can be completely prevented in the scan period of the position read area.

9. 发明专利

JPH1040007A POSITION READING DEVICE 失效
公开(公告)号：JPH1040007A
公开(公告)日：1998-02-13
申请号：JP19433696
申请日：1996-07-24
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , TSUREDA YUTAKA , SUZUKI TETSUYA
IPC分类号： G06F3/041 , G06F3/033
摘要： PROBLEM TO BE SOLVED: To attain highly precise reading by level-fixing the driving signal of a display device among display control signals, preventing a noise component from mixing into the output signal of a tablet, and creating position information. SOLUTION: A position reading period signal generating circuit 9 counts a horizontal scanning signal, compares the counted value with a value preliminarily set by a CPU 1, and supplies a position reading period signal 108 to a signal fixing circuit 8 and a period informing circuit 10 as a low level output when the counted value is turned into the set value. Then, the signal fixing circuit 8 fixes the level of a display data transfer signal and a horizontal scanning signal in the scanning period of a position reading area so that the level changing point of the horizontal scanning signal and the signal changing point of a liquid crystal alternating signal can not be generated. Thus, a noise in the scanning period of the position reading area can be completely evaded and the highly precise position reading can be attained.

10. 发明专利

JPH09152939A POSITION READER 失效
公开(公告)号：JPH09152939A
公开(公告)日：1997-06-10
申请号：JP31086395
申请日：1995-11-29
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI YASUO , RENDA YUTAKA , SUZUKI TETSUYA
IPC分类号： G06F3/041 , G06F3/03 , G06F3/033 , G06F3/045
摘要： PROBLEM TO BE SOLVED: To attain low power consumption by sharply easing restriction to detection timing for the depression position of a tablet arranged on a screen, sharply shortening time consumed for detecting the position by a CPU and reducing power required for recognizing the depression of a pen. SOLUTION: The position reader is provided with a tablet 2 consisting of horizontal and vertical transparent resistor films to be input means, a display device 5, a display controller 7 for controlling the device 5, a position reading period signal generating circuit 9 for setting up a coordinate reading period, and a masking circuit 8 for masking a display control signal in the coordinate reading period. Voltage changed when the tablet 2 is depressed with the pen 2 is detected by a depression signal detecting circuit, a depression signal informing circuit informs the CPU 11 of the pen depression based upon the detection signal and the CPU 1 detects a pen depression point on the tablet 2, but until the pen depression information is received, the CPU 1 executes other processing.

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