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1. 发明专利

JPH1020834A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1020834A
公开(公告)日：1998-01-23
申请号：JP17329896
申请日：1996-07-03
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： KUROKAWA KAZUNARI , KATAOKA NOBORU , YASUKAWA SHINJI , MATSUDO TOSHIMITSU , FUJII TATSUHISA
IPC分类号： G02F1/133 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To reduce shadowing caused by waveform dullness of driver output by outputting an arbitrary voltage by which waveform dullness is caused in the case of an output terminal in which a driver output waveform is not changed. SOLUTION: In a driver output waveform SEG2 in which the same data are continued, since the same data such as ruled lines are continued as compared with a driver output waveform SEG1 displaying the background of a halftone display, a correction is performed in order to reduce a luminance difference caused in the background due to waveform dullness in the SEG1. That is, an arbitrary voltage VM is outputted (d's) as the driver output waveform of the SEG2 for a fixed time according to a correction signal CC1 by detecting that same data are continuously outputted in the SEG2. Thus, effective voltages to be impressed on liquid crystal are made almost equal to each other in all screen regardlessly of display data by causing waveform dullness is an output waveform whose output waveform is not changed and is which waveform dullness is hardly caused by this correction.

2. 发明专利

JPH10282939A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH10282939A
公开(公告)日：1998-10-23
申请号：JP2063598
申请日：1998-02-02
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： KUROKAWA KAZUNARI , KATAOKA NOBORU , WATANABE HIROSHI , ABE HIDEAKI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To reduce power consumption of a liquid crystal display device by dividing into a shift register, an output circuit, and the like of a segment driver to blocks for each arbitrary output numbers and providing a standby function for each block. SOLUTION: A shift register 301, a bit latch circuit 302, a line latch circuit 303, an output circuit 304 are divided into blocks for each 40 output numbers, and each block has a standby circuit 305. Also, an internal data bus SSD and an internal block signal line SSCL2 are divided into blocks, and each divided internal data bus SSD and internal block signal line SSCL2 has a standby circuit 306. Also, a random logic circuit 310 has a standby circuit 307 making a standby state with one piece unit of a segment driver. An internal data bus SD and an internal clock signal SCL are inputted to the standby circuit 307 and the standby circuit 306. Thereby, an operation circuit scale can be reduced.

3. 发明专利

JPH1020275A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1020275A
公开(公告)日：1998-01-23
申请号：JP17893996
申请日：1996-07-09
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： KATAOKA NOBORU , KUROKAWA KAZUNARI , YASUKAWA SHINJI , MATSUDO TOSHIMITSU , FUJII TATSUHISA
IPC分类号： G02F1/133 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To reduce shadowing by correcting the increase of an effective voltage due to a crosstalk noise generated in a non-selective voltage of a common driver by the output change of a segment driver. SOLUTION: The voltage waveform of a common electrode is discribed by a dot line in SEG1, SEG2. In order to prevent the generation of difference in an effective voltage by causing a crosstalk noise in the common electrode, correcting signals CC1, CC2 are formed from the crosstalk noise and the output waveform of SEG2 is corrected (d). At this time, at the changing point of the output signal of a segment driver at the time of white background display of the segment driver, the rise noise of the output signal of segment driver shown by SEG1 and the fall noise of the output signal of segment driver shown by SEG2 are detected by a circuit for detecting a crosstalk noise propagating to the common driver side as the crosstalk noise amount generated on a non- selected level VM, respectively, and outputted to the driver as CC1, CC2 pulse signals.

4. 发明专利

JP2001056486A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001056486A
公开(公告)日：2001-02-27
申请号：JP23424599
申请日：1999-08-20
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： SAITO KAZUNARI , ITO SHIGERU , OGURA AKIRA , KATAOKA NOBORU , YU HIRONOBU
IPC分类号： H01L21/8234 , G02F1/136 , G02F1/1365 , G02F1/1368 , H01L27/088
摘要： PROBLEM TO BE SOLVED: To improve an IC drive circuit and the connection of the IC drive circuit to a transparent substrate side by fonning the contact layers of the source regions and drain regions of high-voltage resistance MIS transistors(TRs) by offsetting the same form element separation regions. SOLUTION: Gate electrodes 19 are formed on the surfaces of well layers 12 in the forming regions of the high-voltage resistance MOS TRs so as to run on the central parts. Low-concentration diffusion layers of p-type are formed between the gate electrodes 19 and peripheral LOCOS layers 13 with the gate electrodes 19 in-between, by which the source regions 20 and the drain regions 21 are formed. The contact layers 22 and 23 are formed by the high- concentration diffraction layers of p-type in the respectively source regions 20 and the drain regions 21. The respective contact layers 22 and 23 are formed in part of the source regions 20 and the drain regions 21 in the same manner as in the case of standard MOS transistors and are formed apart (offset) a specified distance particularly from the peripheral LOCOS layers 13.

5. 发明专利

JP2001022328A LIQUID-CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001022328A
公开(公告)日：2001-01-26
申请号：JP19621299
申请日：1999-07-09
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： ITO SHIGERU , KATAOKA NOBORU , OGURA AKIRA
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To improve the display quality of a display picture displayed on a liquid-crystal display element by providing a switching control means, etc., which turns off a 1st switching means and turns on a 2nd switching means in a specific beginning period of one horizontal scanning period. SOLUTION: A precharge control circuit 30 has a transfer gate circuit (switch circuit) TG31 connected between a high-voltage decoder circuit 278 and a high- voltage amplifier circuit 271 and a transfer gate circuit TG32 connected between a low-voltage decoder circuit 279 and a low-voltage amplifier circuit 272. The transfer gate circuits TG31 and TG32 are controlled with control signals DECT and DECN applied to gate electrodes to disconnect the decoder circuits 278 and 279 from the amplifier circuits 271 and 272 in a precharge period of one horizontal period.

6. 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.

7. 发明专利

JPH06342826A TAPE CARRIER PACKAGE 失效
公开(公告)号：JPH06342826A
公开(公告)日：1994-12-13
申请号：JP13031093
申请日：1993-06-01
申请人： HITACHI LTD
发明人： KATAOKA NOBORU , KUROKAWA KAZUNARI , KATAYANAGI HIROSHI
IPC分类号： H01L21/60
摘要： PURPOSE:To detect an end of an alignment mark precisely by scanning in one direction by connecting a lead line to a contour line nearly in a straight line. CONSTITUTION:An outermost outerlead 6' is connected to a right upper corner part of an alignment mark 2 with a connecting lead 4. The connecting lead 4 and an upper contour line of the positioning mark 2 form a straight line. Therefore, when a video image recognition device is scanned from the outer lead 6' through the connecting lead 4 to the end B of the alignment mark 2, since the first detected end is the end B of the alignment mark 2, the erroneous recognition of the end B of the alignment mark 2 is prevented, and by scanning in one direction, the end B of the positioning mark 2 is detected precisely.

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