公开(公告)号：WO2004059603A3

公开(公告)日：2004-10-21

申请号：PCT/JP0316757

申请日：2003-12-25

Applicant: CASIO COMPUTER CO LTD ,  HARADA TAKAHIRO

Inventor： HARADA TAKAHIRO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3648 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2320/0204 ,  G09G2320/0219

Abstract: A display drive device applied to a display device which drives a display panel (110) comprising a plurality of display pixels (Px) which comprises a gradation voltage setting circuit (40a, 40c)which sets a plurality of gradation voltages and voltage ranges according to each luminosity gradation of the display data, which reverses the gradation voltages for each luminosity gradation of the display data in a predetermined period while providing a change characteristic of the center voltage in reversal of the gradation voltages for each luminosity gradation corresponding to the change inclination of the field through voltage produced when the display signal voltage of each luminosity gradation is applied, and which maintains this change characteristic constant for changing the voltage range value; and a gradation conversion circuit (30a, 30d) which produces display signal voltages based on gradation voltages corresponding to the luminosity gradations of the display data.

Abstract translation: 一种显示驱动装置，应用于驱动包括多个显示像素（Px）的显示面板（110）的显示装置，该显示装置包括灰度电压设置电路（40a，40c），该电路设置多个灰度电压和电压范围， 显示数据的每个发光度等级，其在预定的时间段内反转显示数据的每个发光度等级的等级电压，同时提供与对应于等级改变倾向的每个等级发光度的等级电压相反的中心电压的改变特性 通过施加每个发光度等级的显示信号电压时产生的电压的场，并且为了改变电压范围值而保持该变化特性恒定; 以及基于与显示数据的亮度级对应的灰度级电压产生显示信号电压的灰度级转换电路（30a，30d）。

公开(公告)号：WO2006129890A2

公开(公告)日：2006-12-07

申请号：PCT/JP2006311681

申请日：2006-06-05

Applicant: CASIO COMPUTER CO LTD ,  HARADA TAKAHIRO

Inventor： HARADA TAKAHIRO

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G2310/0248 ,  G09G2310/0297 ,  G09G2310/06 ,  G09G2320/0209 ,  G09G2352/00

Abstract: A display drive device (20) which drives a display panel based on display data, comprises the display panel including a plurality of scan lines and a plurality of signal lines, the signal lines being divided into a plurality of signal line groups, each of the signal line groups including a predetermined number of signal lines, a display signal generation circuit section (23, 24, 25, 26) which sequentially outputs display signal voltages based on the display data in a timesharing manner within each horizontal scanning period, and a selection circuit section (27) which sequentially selects the signal line group corresponding to the display signal voltages output from the display signal generation circuit section (23, 24, 25, 26) in synchronized with an output timing of the display signal voltages, and applies the display signal voltages to the plurality of signal lines constituting the selected signal line group. The selection circuit section (27) applies the display signal voltages to each signal line group plural times within each horizontal scanning period.

Abstract translation: 基于显示数据驱动显示面板的显示驱动装置（20）包括：显示面板，包括多条扫描线和多条信号线，信号线被分成多条信号线组，每条信号线组 包括预定数量的信号线的信号线组，显示信号产生电路部分（23,24,25,26），其在每个水平扫描周期内以分时方式基于显示数据依次输出显示信号电压，以及选择 电路部分（27），其与显示信号电压的输出定时同步地依次选择与从显示信号产生电路部分（23,24,25,26）输出的显示信号电压相对应的信号线组， 对构成选择的信号线组的多条信号线显示信号电压。 选择电路部分（27）在每个水平扫描周期内将显示信号电压施加到每个信号线组多次。

公开(公告)号：AU2003294181A1

公开(公告)日：2004-07-22

申请号：AU2003294181

申请日：2003-12-25

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: A display drive device applied to a display device which drives a display panel (110) comprising a plurality of display pixels (Px) which comprises a gradation voltage setting circuit (40a, 40c) which sets a plurality of gradation voltages and voltage ranges according to each luminosity gradation of the display data, which reverses the gradation voltages for each luminosity gradation of the display data in a predetermined period while providing a change characteristic of the center voltage in reversal of the gradation voltages for each luminosity gradation corresponding to the change inclination of the field through voltage produced when the display signal voltage of each luminosity gradation is applied, and which maintains this change characteristic constant for changing the voltage range value; and a gradation conversion circuit (30a, 30d) which produces display signal voltages based on gradation voltages corresponding to the luminosity gradations of the display data.

公开(公告)号：HK1115219A1

公开(公告)日：2008-11-21

申请号：HK08110543

申请日：2008-09-23

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: G09G20060101

Abstract: A display drive device which drives a display panel based on display data, the display panel including a plurality of scan lines and a plurality of signal lines, the signal lines being divided into a plurality of signal line groups, each of the signal line groups including a predetermined number of signal lines, a display signal generation circuit section which sequentially outputs display signal voltages based on the display data in a time sharing manner within each horizontal scanning period, and a selection circuit section which sequentially selects the signal line group corresponding to the display signal voltages output from the display signal generation circuit section in synchronization with an output timing of the display signal voltages, and applies the display signal voltages to the plurality of signal lines constituting the selected signal line group. The selection circuit section applies the display signal voltages to each signal line group plural times within each horizontal scanning period.

公开(公告)号：AU2003294181A8

公开(公告)日：2004-07-22

申请号：AU2003294181

申请日：2003-12-25

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: A display drive device applied to a display device which drives a display panel (110) comprising a plurality of display pixels (Px) which comprises a gradation voltage setting circuit (40a, 40c) which sets a plurality of gradation voltages and voltage ranges according to each luminosity gradation of the display data, which reverses the gradation voltages for each luminosity gradation of the display data in a predetermined period while providing a change characteristic of the center voltage in reversal of the gradation voltages for each luminosity gradation corresponding to the change inclination of the field through voltage produced when the display signal voltage of each luminosity gradation is applied, and which maintains this change characteristic constant for changing the voltage range value; and a gradation conversion circuit (30a, 30d) which produces display signal voltages based on gradation voltages corresponding to the luminosity gradations of the display data.

公开(公告)号：JP2001343951A

公开(公告)日：2001-12-14

申请号：JP2000166260

申请日：2000-06-02

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal driving device in which frequency of the shift clock of a scanning driver is reduced while displaying a black strip region that is set for displaying a wide image on a liquid crystal display panel and which has reduced size (integrated) and saved power consumption and a method for driving the device. SOLUTION: When a wide image having an aspect ratio that differs from a display screen size is to be displayed on a liquid crystal display panel in which plural liquid crystal pixels are arranged in a matrix manner, a portion of the wide image is displayed in either one of an upper display region or a lower display region, black color display is provided to an upper black strip Bu or a lower black strip Bd included in an another display region and the process, in which a scanning line of the black strip region is selected and the scanning is conducted, and the process, in which a scanning line of the wide image is partially selected and the scanning is conducted, are overlapped in time wise (simultaneously) and executed.

公开(公告)号：JP2001189425A

公开(公告)日：2001-07-10

申请号：JP37509199

申请日：1999-12-28

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: H01L27/04 ,  G05F1/12 ,  H01L21/822

Abstract: PROBLEM TO BE SOLVED: To provide a power supply circuit which is low in power consumption and capable of efficiently stepping up a voltage. SOLUTION: A power supply source is composed of a step-up circuit 1 and a control circuit 2, which controls the step-up circuit 1. The step-up circuit 1 is composed of capacitors formed on a semiconductor substrate and a switch which switches the connection of wirings to the capacitors. The control circuit 2 turns switching on or off and connects capacitors together in parallel, and the capacitors are charged with the voltage VDD of a power supply. The control circuit 2 charges stray capacitances with the voltage VDD of a power supply, so as to suppress the amount of charge supplied to the stray capacitances which accompany without fail on capacitors from the capacitors, when a stepped-up voltage is outputted. Thereafter, the control circuit 2 generates a stepped-up voltage VUOUT higher than the power supply voltage connecting the charged capacitors together in series and outputs it to an external device.

公开(公告)号：JP2000194325A

公开(公告)日：2000-07-14

申请号：JP37189098

申请日：1998-12-28

Applicant: CASIO COMPUTER CO LTD

Inventor： IWASAKI MAKOTO ,  YONEKAWA TATSUHIKO ,  HARADA TAKAHIRO

IPC: G09G3/36 ,  G02F1/133 ,  G09G3/20 ,  H04N5/202 ,  H04N9/69

Abstract: PROBLEM TO BE SOLVED: To faithfully reproduce a gray shades display and to realize an appropriate picture display regardlessly of the temperature condition of the environment where a liquid crystal panel is used. SOLUTION: This device is provided with a liquid crystal panel which is composed of liquid crystal pixels provided at each cross point of data lines and scanning lines in a matrix manner, a data driver which supplies display data in a liquid crystal pixel unit through the data lines, a scanning driver which supplies an operating voltage of liquid crystal element units through the scanning lines, an interface section which converts inputted analog picture signals into digital signals having a prescribed bit number, a temperature detecting section 30 which detects the temperature of the panel in its display operation, and a driving control section 40 which conducts a γcompensation that makes the γ characteristic of the panel linear and converts the digital signals to driving signals.

公开(公告)号：JPH09198035A

公开(公告)日：1997-07-31

申请号：JP2206196

申请日：1996-01-12

Applicant: CASIO COMPUTER CO LTD

Inventor： HARADA TAKAHIRO

IPC: G06F3/153 ,  G09G5/00 ,  G09G5/36 ,  G09G5/39 ,  G09G5/393

Abstract: PROBLEM TO BE SOLVED: To reduce the effect to be exerted upon visual perception by the data read out from the faulty storage area of a data storage means. SOLUTION: A controller 3 converts video signals R, G, B to be inputted via an A/D converter 2 into multilevel data and performs data writings to a data storage device 4 in data arrangements which are different for every data writing operation and reads out the multilevel data in the same data arrangements as that at the time of the data writings to supply them to an LCD 5. Even when a faulty area is present in the data storage device 4, since data whose data arrangement orders are different are read out at every readout operation from the faulty area, display positions of the fauly data are dispersed and then the display positions of the fauly data are made to be inconspicuos.

公开(公告)号：JPH10123481A

公开(公告)日：1998-05-15

申请号：JP28076296

申请日：1996-10-23

Applicant: CASIO COMPUTER CO LTD

Inventor： YAMAGISHI KOJI ,  YONEKAWA TATSUHIKO ,  SAKAMOTO MASANORI ,  HARADA TAKAHIRO

IPC: G02F1/133 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To provide the liquid crystal display device, in which the amount of variation in an effective value is reduced and the generation of cross talk is also reduced, by dividing and generating the spikes, that are generated with signal electrode driving signals while conducting a polarity reversal driving of the scanning electrodes, into before and after the polarity reversal timing, canceling the generation of the spikes and providing a zero bias period. SOLUTION: In a liquid crystal display device 1, the alternative signals, which are inputted into a segment driver 3, are divided into odd and even electrode alternative signals and the polarity reversal timing of each signal electrode driving signal, which is applied to the odd and even signal electrodes, is made different while polarity reversal is conducted by the alternative control signal inputted to a common driver 2, spike waveforms are generated in a distributable manner before and after the polarity switching, the amount of variation in the effective value of the liquid crystal applied voltage by the spike waveforms is reduced and the cross talk generation is also reduced.