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1. 发明专利

JP2001237688A LEVEL CONVERTER CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001237688A
公开(公告)日：2001-08-31
申请号：JP2000047164
申请日：2000-02-24
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： OKUMURA HARUHISA , OTE YUKIHIDE
IPC分类号： G02F1/136 , G02F1/133 , G02F1/1368 , G09G3/36 , H03K19/003 , H03K19/0185
摘要： PROBLEM TO BE SOLVED: To provide a level shift circuit which can stably operate at high speed against the threshold fluctuation of a transistor. SOLUTION: This circuit is provided with the circuit of a first stage having a first conductive transistor M3 and a load circuit connected to this first conductive transistor and the circuit of a second stage having a first conductive transistor M4 and a second conductive transistor M2 connected to the relevant first conductive transistor, and an external input signal voltage or DC voltage is impressed to all the electrodes except one connected to an output or output to the next stage among the electrodes of the first conductive transistor in the circuit of the first stage and the first conductive transistor in the circuit of the second stage.

2. 发明专利

JPH05346417A 失效
公开(公告)号：JPH05346417A
公开(公告)日：1993-12-27
申请号：JP24990592
申请日：1992-09-18
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： NAKANO TOSHIO , MAYAMA KOICHI , YAMAMOTO OSAMU , SHIIBA ITARU , KAWASAKI HIROSHI , OKAWA NAOYUKI , KURAMOCHI TOSHIAKI , MAKI EMIKO , OTE YUKIHIDE
IPC分类号： G01N1/00 , G01N1/22 , G01N27/06 , G01N27/28 , G01N27/416 , G01N30/00
摘要： PURPOSE:To analyze thin ionic gas in intake gas highly accurately. CONSTITUTION:The ionic gas analyzer comprises intake system 1 and discharge system 4 of gas containing ionic gas, a steam admixing system 2 for admixing steam with the gas containing ionic gas taken in between the intake system and the discharge system, a condenser 3 for cooling steam along with the gas containing ionic gas to produce condensate thereof, a condensate collecting sump 6, an ion detecting system 14, a system 11 for feeding the condensate to the detector, and a system 17 for feeding pure water to a steam mixer and a cooler/condenser. This analyzer realizes precise analysis in which reproducibility and response are enhanced.

3. 发明专利

JPH0954309A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0954309A
公开(公告)日：1997-02-25
申请号：JP20547195
申请日：1995-08-11
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： KOSHI HIROBUMI , KATAYANAGI HIROSHI , YU HIRONOBU , KATAOKA NOBORU , YASUKAWA SHINJI , OTE YUKIHIDE
IPC分类号： G02F1/133 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To make it possible to reduce the electric power consumption of a gradation voltage forming circuit forming many gradations of gradation voltages by specifying the circuitry construction of this gradation voltage forming circuit. SOLUTION: The rear stage of the gradation voltage forming circuit forming the many gradations of the gradation voltages is provided with a first switching element Sc and second switching element Sg of which the terminals at one side are connected to pixel electrodes and the terminal on the other side are inputted with power supply voltage and reference voltage. The first switching element Sc or second switching element Sg is alternately conducted in the prescribed period from the time of the voltage inversion to invert the gradation voltage to be impressed on a drain signal line in synchronization with a current alternating signal, by which the liquid crystal layer is precharged to the power supply potential when the common driving voltage Vcom to be impressed on a common electrode is at an H level and to the reference potential when the common driving voltage is at an L level. The charging and discharging currents flowing to the liquid crystal layer are decreased via the gradation reference voltage source forming the gradation reference voltage and the drain driver.

4. 发明专利

JPH05346379A 失效
公开(公告)号：JPH05346379A
公开(公告)日：1993-12-27
申请号：JP24990692
申请日：1992-09-18
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： NAKANO TOSHIO , MAYAMA KOICHI , YAMAMOTO OSAMU , SHIIBA ITARU , KAWASAKI HIROSHI , OKAWA NAOYUKI , OTE YUKIHIDE , KURAMOCHI TOSHIAKI , MAKI EMIKO
IPC分类号： G01N1/10 , G01N1/22 , G01N27/06 , G01N27/28 , G01N27/416 , G01N30/00
摘要： PURPOSE:To analyze a thin ionic gas in an intake gas with high sensitivity and high precision. CONSTITUTION:An intake system 1 and an exhaust system 4 for a gas containing an ionic gas, a steam mixing system 2 which mixes steam in the aforesaid gas containing the ionic gas and taken in, in the middle between the intake system and the exhaust system, a condenser 3 which cools down the steam together with the gas containing the ionic gas and produces a condensate, a condensate collector 6 provided with a level gage 7, an ion detecting system 14, a liquid supply system 11 which supplies the condensate to a detector, a demineralized water introducing system 17 which introduces demineralized water into a steam mixer and the cooling condenser, and a disposal system, are provided. According to this constitution, an analysis of each object gas and a precision analysis having responsiveness improved can be executed.

5. 发明专利

JP2002323877A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2002323877A
公开(公告)日：2002-11-08
申请号：JP2001128620
申请日：2001-04-26
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： SAITO KAZUNARI , ITO SHIGERU , OTE YUKIHIDE , NAKAYASU YOZO , YASUKAWA SHINJI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To realize a liquid crystal display device in which a driving circuit having low power consumption is mounted on the same substrate as that of a display part. SOLUTION: A driving circuit supplying a gradation voltage to pixels is mounted on a liquid crystal display panel and display data are transferred with wirings formed on the liquid crystal display panel between the driving circuit and the display panel and the display data are transferred with internal data bus lines in the inside of the driving circuit and a data inverting operation for inverting values of the display data in order to lower power consumption is performed in the inside of the driving circuit.

6. 发明专利

JPH11109928A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11109928A
公开(公告)日：1999-04-23
申请号：JP27229997
申请日：1997-10-06
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： OTE YUKIHIDE , OGURA AKIRA , AGATA KENTARO , KUROKAWA KAZUNARI , FUJIOKA TAKAHIRO , KATAYANAGI HIROSHI , GOTO MITSURU
IPC分类号： G02F1/133 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To generate the gradation voltage having more multilevel by reducing the total number of switch elements in a decoder circuit and reducing a chip size of a video signal line drive means. SOLUTION: A positive gradation voltage generation circuit 151a generates a first gradation voltage of positive polarity 17 levels based on positive polarity 5-ary gradation reference voltages V"0-V"4 inputted from a positive voltage generation circuit. A multiplexer 302 outputs the first gradation voltage VOUTA selected by the decoder circuit 301 to a terminal P1 or the terminal P2, and outputs the first gradation voltage VOUTB selected by the decoder circuit 301 to the terminal P2 or the terminal P1. A second gradation voltage generation circuit 303 voltage divides a potential difference ΔV between the first gradation voltages VOUTA, VOUTB adjacent to each other outputted from the multiplexer 302 to generate the voltages of 1/4 ΔV, 2/4 (=1/2) ΔV, 3/4 ΔV, 4/4 (=1) ΔV of the potential difference ΔV.

7. 发明专利

JPH08122733A LIQUID CRYSTAL DRIVING CIRCUIT 失效
公开(公告)号：JPH08122733A
公开(公告)日：1996-05-17
申请号：JP25347394
申请日：1994-10-19
申请人： HITACHI LTD , HITACHI DEVICE ENG , HITACHI VLSI ENG
发明人： OTE YUKIHIDE , KODERA KOICHI , KOSHI HIROBUMI , KATAYANAGI HIROSHI , YASUKAWA SHINJI
IPC分类号： G02F1/133 , G09G3/18
摘要： PURPOSE: To improve the picture quality of a display image and to reduce power consumption and the number of out-fitted parts by providing plural operational amplifiers operated selectively corresponding to plural target voltages per one output terminal connected to liquid crystal capacitance, respectively. CONSTITUTION: A buffer amplifier part 40 supplies an analog driving signal to the liquid crystal capacitance comprising a liquid crystal load 140. A switch 80 for gradation voltage selection which comprises the buffer amplifier part 40 selects a gradation voltage based on the voltage of a switch 70 for divided voltage, and applies it to a first operational amplifier 90 and a second operational amplifier 100 selectively under the control of an amplifier switching control circuit 150. The first operational amplifier 90 operates by fitting the output voltage of the switch 80 for gradation voltage selection in a target voltage level in accordance with the source current of the liquid crystal load, and the second operational amplifier 100 operates by fitting the output voltage of the switch 80 for gradation voltage selection in the target voltage level in accordance with the sync current of the liquid crystal load. In this way, the dynamic range of the whole output voltage can be set widely.

8. 发明专利

JPH11133926A SEMI-CONDUCTOR INTEGRATED CIRCUIT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11133926A
公开(公告)日：1999-05-21
申请号：JP29822797
申请日：1997-10-30
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： FUJIOKA TAKAHIRO , KUROKAWA KAZUNARI , KATAYANAGI HIROSHI , GOTO MITSURU , OTE YUKIHIDE , OGURA AKIRA , AGATA KENTARO
IPC分类号： G02F1/136 , G02F1/133 , G02F1/1368 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To enable the use of a low withstand pressure transistor for switching element by forming a switching element of a pair of transistors of an input terminal side transistor and an output terminal side transistor connected in series to each other. SOLUTION: When a PMOS transistor PM1 is turned off and a NMOS transistor NM2 is turned on, voltage at 15 V as the maximum is applied to both ends of a pair of transistors. But, since the PMOS transistor PM1 is turned off, current is not flowed, and source voltage of the PMOS transistor PM21 becomes a voltage obtained by subtracting a threshold value voltage from a gate voltage, and the source voltage of the PMOS transistor PM21 is equal to the gate voltage (0 voltage) and the withstand pressure between a source and a drain at about 15 V is unnecessary for the PMOS transistor PM1, and a low withstand pressure transistor PMOS at about 10 V can be used. Chip size of a semi-conductor chip to be loaded on a switching circuit can be reduced.

9. 发明专利

JPH1195726A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1195726A
公开(公告)日：1999-04-09
申请号：JP25804797
申请日：1997-09-24
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： YU HIRONOBU , KOSHI HIROBUMI , GOTO MITSURU , OTE YUKIHIDE , WATANABE HIROSHI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To make more finely adjustable a multi-level voltage generated by a gradation voltage generation means, by making respective voltage divided resistance in a resistance voltage divider circuit synthetic resistance selected form among respective connection points, etc., of plural pieces of serially connected reference resistance. SOLUTION: Serial resistance circuit 30 in which eight pieces of reference resistance R1-R8 are connected in series between gradation voltage wiring layers Va-Vg where respective gradation voltages are output, are constituted. Then, at least a piece of both ends a, i of the serial resistance circuits 30 and at least a piece of the connection points b-h of the respective reference resistance R1-R8 are connected to adjacent one side of the gradation voltage wiring layers Va-Vg, at least a piece of the both ends a, i of the serial resistance circuits 30 except the circuit 30 connected with the adjacent one side of the gradation voltage wiring layers Va-Vg and at least a piece of the connection points b-h of the respective reference resistance R1-R8 are connected to an adjacent other side of the gradation voltage wiring layers Va-Vg and the voltage divided resistance of a resistance voltage divider circuit are constituted. Thus, resistance values from a minimum R/8 to a maximum 8R are obtained as the voltage divided values of the voltage divided resistance.

10. 发明专利

JPH07325556A GRADATION VOLTAGE GENERATION CIRCUIT FOR LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH07325556A
公开(公告)日：1995-12-12
申请号：JP11785994
申请日：1994-05-31
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： OTE YUKIHIDE , YASUKAWA SHINJI , ABE HIDEAKI , WATANABE HIROSHI , KITAGAWA KATSUYUKI , KOSHI HIROBUMI
IPC分类号： G02F1/133 , G09G3/36
摘要： PURPOSE:To reduce power consumption in a gradation voltage generation circuit by driving the gradation voltage generation circuit in time-division manner and interrupting a DC current flowing through a series division resistance circuit in the period when a switch element control signal is a high level. CONSTITUTION:In the period when the switch element control signal P2 is the high level (TW), an input side switch element Sin and an output side switch element Sn are turned on, and the other switch elements are turned off, and in the period when the switch element control signal P2 is a low level, the input side switch elements Sin, Sin-1 and the output side switch element Sa are turned on, and the other switch elements are turned off. Thus, the DC current flowing through the input side switch element Sin, the series division resistance circuit 3 and the Sin-1 in the period when the switch element control signal P2 is the high level is interrupted, and the power consumption in the gradation voltage generation circuit is reduced.

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