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公开(公告)号：JP2003087688A
公开(公告)日：2003-03-20
申请号：JP2001272930
申请日：2001-09-10
Applicant: SONY CORP
Inventor： INO MASUMITSU , MAEKAWA TOSHIICHI
IPC: G01C21/00 , B60K35/00 , B60K37/02 , G02B5/02 , G02B5/04 , G02F1/13 , G02F1/133 , G02F1/1335 , G02F1/13357 , H04N5/72
Abstract: PROBLEM TO BE SOLVED: To provide an on-vehicle display device in which the visibility of a display image from a driver's seat side and a passenger' seat side is improved and the reflection of the display image in side glass is eliminated. SOLUTION: When a liquid crystal display device is arranged at the center part of a dashboard, variation in luminance or contrast is set to almost =-20 dB to the right and left at about >=40 deg. from the center to prevent the reflection of the display image in right and left side glasses.
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公开(公告)号：JP2003029715A
公开(公告)日：2003-01-31
申请号：JP2001211797
申请日：2001-07-12
Inventor： KIDA YOSHITOSHI , NAKAJIMA YOSHIHARU , SHIMOGAICHI YASUSHI , MAEKAWA TOSHIICHI
Abstract: PROBLEM TO BE SOLVED: To provide a display device capable of realizing a partial display mode with a simple constitution and also capable of realizing a more reduced power consumption and a portable terminal on which the display device is mounted. SOLUTION: In a liquid crystal display device having the partial display mode, at the time of driving a non-display area, for example, white signals to be supplied from an external driver IC 15 are simultaneously written in the non-display area by turning analog switches of the selection switching pat 13 all ON and also level shifting circuits which are provided in the selection switch control part 14 and which give driving pulses having high amplitude to respective analog switches of the selection switching part 13 are made to be in an inactive states under the control of a selection switch control circuit 14.
Abstract translation: 要解决的问题：提供一种能够以简单的结构实现部分显示模式并且还能够实现更低功耗的显示装置和安装显示装置的便携式终端。 解决方案：在具有部分显示模式的液晶显示装置中，在驱动非显示区域时，例如，将通过转动来从外部驱动器IC 15提供的白色信号同时写入非显示区域 使选择开关控制部分14中提供的选择切换节拍13的所有ON和电平移动电路以及向选择切换部分13的相应模拟开关提供具有高振幅的驱动脉冲的模拟开关使其处于非活动状态 在选择开关控制电路14的控制下的状态。
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公开(公告)号：JP2002175053A
公开(公告)日：2002-06-21
申请号：JP2000372355
申请日：2000-12-07
Applicant: SONY CORP
Inventor： NAKAJIMA YOSHIHARU , MAEKAWA TOSHIICHI
IPC: G02F1/1368 , G02F1/133 , G09F9/30 , G09G3/36 , H01L27/32 , H01L29/786
Abstract: PROBLEM TO BE SOLVED: To provide an active matrix display in which a narrower frame can be formed in a polysilicon TFT structure integrated with drive circuits, and to provide a mobile terminal which uses the above device as a display part. SOLUTION: In the polysilicon TFT-active matrix type liquid crystal display device integrated with drive circuits, at least one of circuits relating to signals with small amplitudes or circuits relating to the power supply voltage, or a part of the circuits relating to the signals with small amplitudes such as a sampling clutch circuit 132, or a part of the circuits relating to the power supply voltage, such as a circuit 19 generating the voltage on a counter electrode is formed by using TFTs having a dual gate structure. Other circuits are formed by using TFTs, having a top gate structure or a bottom gate structure.
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公开(公告)号：JP2001282168A
公开(公告)日：2001-10-12
申请号：JP2000096964
申请日：2000-03-31
Applicant: SONY CORP
Inventor： KIDA YOSHITOSHI , NAKAJIMA YOSHIHARU , MAEKAWA TOSHIICHI
Abstract: PROBLEM TO BE SOLVED: To solve the problem that, in a reference voltage selection type D/A conversion circuit, since a switching part positioned between a reference voltage line supplying a reference voltage for the number of gradations and a column line of a pixel part occupies a large area, the switching part becomes a hindrance to narrowing of the frame part of an LCD panel. SOLUTION: In a reference voltage selection type D/A conversion circuit, weighting is performed to channel widths W of respective transistors of MOS switches constituting respective gradation selecting units 41-0 to 41-3 in accordance with a gradation to be selected. Specifically, when the channel width of MOS switches Qn11, Qn12, the channel width of MOS switches Qn13, Qp11, the channel width of MOS switches Qp12, Qn14, the channel width of MOS switches Qp13, Qp14 are defined respectively as W0, W1, W2 and W3, the channel width W3 is set in conformity with the maximum capacity of the column line and other channel widths W0, W1, W2 are set so as to satisfy the relation of W0
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公开(公告)号：JP2000305528A
公开(公告)日：2000-11-02
申请号：JP11307899
申请日：1999-04-21
Applicant: SONY CORP
Inventor： UCHINO KATSUHIDE , MAEKAWA TOSHIICHI
Abstract: PROBLEM TO BE SOLVED: To provide a level conversion circuit capable of sustaining a duty ratio of a two-phase clock signal outputted finally at 50%, even if a duty ratio of an output clock of a level shifter is confused by fluctuation of a supply voltage or the like, and a liquid crystal display device capable of improving a vertical stripe defect caused by shift of a duty ratio of a two-phase horizontal clock, and capable of improving an image quality. SOLUTION: In this level conversion circuit having such a formation that, for example, a mutually-antiphase two-phase clock is boosted and outputted after meeting the mutual phases with each other, two level shifters 11, 12 are installed as means for converting a level of the mutually-antiphase two-phase clock, and the two-phase clock is inputted in mutually opposite phases relative to the level shifters 11, 12. Each one-phase clock outputted from the level shifters 11, 12 is supplied to a phase adjusting circuit 15, and outputted as a mutually-antiphase two-phase clock having a duty ratio of 50% after executing mutual phase adjusting in the phase adjusting circuit 15.
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Patent Agency Ranking
公开(公告)号：JP2000305504A
公开(公告)日：2000-11-02
申请号：JP36723599
申请日：1999-12-24
Applicant: SONY CORP
Inventor： MAEKAWA TOSHIICHI , NAKAJIMA YOSHIHARU , MORITA SHINTARO
Abstract: PROBLEM TO BE SOLVED: To eliminate the necessity of providing a power generation circuit in addition to a liquid crystal display(LCD) pannel in which another power generation circuit is incorporated by providing such an LCD pannel, and supplying a voltage generated at the circuit to a drive circuit. SOLUTION: In an active matrix type LCD, a negative power generation circuit 22 is integrally formed on an LCD pannel 21 by using a polysilicon thin film transistor. The circuit 22 is incorporated to supply a generated negative power voltage to a drive circuit, e.g. a vertical driver 20. The circuit 22 generates the negative power voltage according to a horizontal clock HCK with the HCK to be inputted to a horizontal driver 19 inputted thereto, and the voltage is supplied to a second negative side power line at an output stage of the vertical driver 20.
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公开(公告)号：JP2000267067A
公开(公告)日：2000-09-29
申请号：JP7478999
申请日：1999-03-19
Applicant: SONY CORP
Inventor： UCHINO KATSUHIDE , MAEKAWA TOSHIICHI
Abstract: PROBLEM TO BE SOLVED: To obtain a liquid crystal display device and its driving method which can realize a two-step precharge even when a graphic display standard with a short horizontal blanking period for a video format is used. SOLUTION: In the active matrix type TFT liquid crystal display device by a dot-sequential driving method, sampling switches Pb1 to Pb4 and Pg1 to Pg4 in two series are connected between each signal line sig1 to sig4 arranged for every line and a precharge signal line 18-1 to input a black level precharge signal Psig-black and the precharge signal line 18-2 to input the gray level precharge signal Psig-gray. For every signal line of sig1 to sig4, first, the black level precharge signal Psig-black, and then the gray level precharge signal Psig-gray are successively written, and then the video signal video is written.
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公开(公告)号：JP2000224024A
公开(公告)日：2000-08-11
申请号：JP2338299
申请日：1999-02-01
Applicant: SONY CORP
Inventor： NAKAJIMA YOSHIHARU , MAEKAWA TOSHIICHI
IPC: G11C19/00 , G09G3/20 , G09G3/36 , H03K5/02 , H03K19/0185
Abstract: PROBLEM TO BE SOLVED: To enable a level-shifting circuit composed fundamentally of a CMOS latch cell to input a signal, having a sufficient amplitude for turning on each transistor constituting the CMOS latch cell, when a device having a large threshold is used. SOLUTION: The operating points of CMOS inverters 11 and 12 are defined more clearly by connecting resistance elements R11 and R12 between the two input sections of a CMOS latch cell 10 (the input terminals of CMOS inverters 11 and 12) and two input signal sources (two circuit input terminals 13 and 14 to which input signals in1 and in2 are inputted) and giving the input signals in1 and in2 to the two input sections of the cell 10 by DC-shifting the signals in1 and in2, and in addition, by connecting resistance elements R13 and R14 between the input terminals of the inverters 11 and 12 and a power source VDD and biasing nodes 1 and 2.
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公开(公告)号：JP2000180821A
公开(公告)日：2000-06-30
申请号：JP35410498
申请日：1998-12-14
Applicant: SONY CORP
Inventor： INO MASUMITSU , KUNII MASABUMI , SATO MAKI , MAEKAWA TOSHIICHI
IPC: G09G3/36 , G02F1/133 , G02F1/1343 , G02F1/136 , G02F1/1368 , G09G3/20
Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device performing a higher definition display on a liquid crystal display part having the number of pixels more than the number of pixels of the original data. SOLUTION: In the liquid crystal display device provided with a data conversion circuit converting the original data consisting of addresses (x, y) of respective pixel and an image signal d(x, y) and the liquid crystal display part 13 displaying an image according to the instruction of the data conversion circuit, the liquid crystal display part 13 is provided with the number of pixels doubling the number of pixels of the original data in the horizontal direction and vertical direction. The data conversion circuit displays the image signal d(x, y) of the original data for the pixel of the address (X, Y)=(2x, 2y) of the liquid crystal display part 13 answering to the address (x, y) of the original data, and displays an interpolation signal obtained based on the image signal d(x, y) on the other pixels A, B, C in the liquid crystal display part 13 as a display signal D(X, Y).
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公开(公告)号：JP2000066642A
公开(公告)日：2000-03-03
申请号：JP23310498
申请日：1998-08-19
Applicant: SONY CORP
Inventor： NAKAJIMA YOSHIHARU , MAEKAWA TOSHIICHI
Abstract: PROBLEM TO BE SOLVED: To make reducible the area of a liquid crystal display device, to make realizable the narrowing of frame thereof, and to make realizable the multiple gradation. SOLUTION: The liquid crystal display device is provided with a data line drive circuit 20 having analog-digital conversion circuits 23-1 to 23-m provided with reference voltage lines V1L-V8L of the number corresponding to the gradation number of the high order bit of image data, a low order bit decode circuit 23, to receive the low order bit of the image data and output the pulse signal at every preset time corresponding to the content of the information, and a reference voltage selection circuit 232 to receive the pulse signal Sblow by high order bit and low order bit decode circuits of the image data, to select only the reference voltage line according to the content of the high order bit information only for the period when the pulse signal is active, and to supply the voltage of the selected reference voltage line to the data line. The liquid crystal display device is provided with a reference voltage generation circuit 30 to supply the reference voltage which is changed by the gradation number of the low order bit of the image data to each reference voltage line.
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