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1. 发明专利

JP2003280037A Active matrix type liquid crystal display device 审中-公开
标题翻译：主动矩阵式液晶显示装置
公开(公告)号：JP2003280037A
公开(公告)日：2003-10-02
申请号：JP2003026136
申请日：2003-02-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ASHIZAWA KEIICHIRO , OTA MASUYUKI , OGAWA KAZUHIRO , YANAGAWA KAZUHIKO , YANAI MASAHIRO , KONDO KATSUMI , OE MASATO , KONISHI NOBUTAKE
IPC分类号： G02F1/1337 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To provide an active matrix type liquid crystal display device having a wide range of viewing angles with uniform color tone and capable of realizing the same viewing angle as that of a CRT, and also improving picture quality.
SOLUTION: This is the active matrix type liquid crystal display device comprising a pair of substrates, a liquid crystal layer held between the pair of substrates, a plurality of video signal lines formed on one of the substrates of the pair, a plurality of scanning signal lines formed on the one of the substrates of the pair, and pixel electrodes and counter electrodes formed on the one of the substrates, and the counter electrodes are supplied with counter voltage from the scanning signal lines.
COPYRIGHT: (C)2004,JPO
摘要翻译：解决的问题：提供具有均匀色调的宽视角范围的有源矩阵型液晶显示装置，并能够实现与CRT相同的视角，并且还提高图像质量。解决方案：这是一种有源矩阵型液晶显示装置，包括一对基板，保持在一对基板之间的液晶层，形成在该对基板之一上的多个视频信号线，多个形成在一对基板上的扫描信号线，以及形成在一个基板上的像素电极和对置电极，并且从扫描信号线向对向电极提供相对电压。版权所有（C）2004，JPO

2. 发明专利

JPH10186410A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH10186410A
公开(公告)日：1998-07-14
申请号：JP1719098
申请日：1998-01-29
申请人： HITACHI LTD
发明人： OTA MASUYUKI , YANAGAWA KAZUHIKO , ASHIZAWA KEIICHIRO , MISHIMA YASUYUKI , OGAWA KAZUHIRO , OE MASATO , KONDO KATSUMI , YANAI MASAHIRO
IPC分类号： G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To drive a liquid crystal display device with a low voltage and a low power consumption by allowing electrode width of shorter side of pixel electrodes to exceed the thickness of a liquid crystal composition layer and to be smaller than the interval between the pixel electrode and a video signal line. SOLUTION: Each pixel is arranged ion the intersection area (in the area surrounded by four lines of signal lines) of a scanning signal line (a gate signal line or a horizontal signal line) GL, an counter voltage signal line (a counter electrode wiring) CL and adjacent two lines of video signal lines (a drain signal line or a cervical signal line) DL. Each pixel includes a thin film transistor TFT, a storage capacitance Cstg, pixel electrodes PX and counter electrodes CT. Electrode widths of the pixel electrodes PX and counter electrodes CT are respectively set to be sufficiently larger than values exceeding the maximum set thickness of a liquid crystal layer. Moreover, maximum values of electrode widths of respective electrodes PX, CT are made smaller than the interval between the pixel electrode PX and the counter electrode CT.

3. 发明专利

JPH10186391A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH10186391A
公开(公告)日：1998-07-14
申请号：JP34942996
申请日：1996-12-27
申请人： HITACHI LTD
发明人： OE MASATO , ONO KIKUO , OTA MASUYUKI
IPC分类号： G02F1/1337 , G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To attain the compatibility between a wide visual field angle and display uniformity inconspicuous in display abnormality, by forming an oriented layer on at least one surface of a liquid crystal layer, specifying the specific resistance of this liquid crystal layer, and forming a part of electrode structure in direct contact with the oriented film. SOLUTION: Two sheets of transparent glass substrates having polished surfaces are used as substrates SUB1, 2. A thin-film transistors is formed on the one substrate of these substrates SUB1, 2. A silicon nitride film which is an insulating film is formed thereon. A pixel electrode, which is a slender wire-shaped or belt-like electrode and a common electrode are formed as the electrode structure for driving liquid crystal on the insulating film. Further, an oriented film is applied thereon. In such a case, the oriented film is formed on at least one surface of the liquid crystal layer and the specific resistance of the liquid crystal layer is >=10 Ω.cm. The electrode structure is partly formed in direct contact therewith.

4. 发明专利

JPH10170939A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH10170939A
公开(公告)日：1998-06-26
申请号：JP461998
申请日：1998-01-13
申请人： HITACHI LTD
发明人： OTA MASUYUKI , YANAGAWA KAZUHIKO , ASHIZAWA KEIICHIRO , MISHIMA YASUYUKI , OGAWA KAZUHIRO , OE MASATO , KONDO KATSUMI , YANAI MASAHIRO
IPC分类号： G02B5/00 , G02F1/1335 , G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration in display contrast by completely shielding the light leakage caused from the portion of the electric field generated between video signal lines and counter electrodes using a light shielding film (a black matrix). SOLUTION: A pixel electrode PX and a counter electrode CT are made opposed to each other, and the optical conditions of liquid crystals LC are controlled by the electric field between electrodes PX and CT, and the display is controlled. One of the electrodes CT of the respective pixels is positioned adjacent to both sides of a video signal line DL, a black matrix BM is formed over the line DL and its contour section is extended to the CT positioned adjacent to both sides of the line DL. In other words, the transmission light beams from an unnecessary interval section (the interval other than the gap between the electrodes PX and CT) are emitted to the display surface side in an upper section transparent glass substrate SUB2 side so that the matrix BM is formed to prevent the deterioration in the display contrast ratio.

5. 发明专利

JPH09258269A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH09258269A
公开(公告)日：1997-10-03
申请号：JP7178796
申请日：1996-03-27
申请人： HITACHI LTD
发明人： ARAYA SUKEKAZU , HAAGEN KURAUSUMAN , KONDO KATSUMI , ASHIZAWA KEIICHIRO , OTA MASUYUKI , OE MASATO
IPC分类号： G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device with a wide view angle, without gradation inversion at all, capable of multi-level displaying and with a high numerical aperture by constituting the device so that initial oriented direction of liquid crystal molecules is one direction, and plural driving direction of the liquid crystal molecules are provided in one pixel. SOLUTION: In the liquid crystal display device provided with a group of pixel electrodes 2 in matrix formed so that electric field applied to a liquid crystal layer becomes nearly parallel to a substrate surface, an active element and a prescribed drive means, the initial oriented direction of the liquid crystal is made one direction, and plural driving directions of the liquid crystal exist in one pixel. For instance, when the pixel electrode 2 and a common electrode 3 are constituted of a bent structure, two electric field directions 7 exist in the pixel. The liquid crystal molecule arranged along the initial oriented direction 6 of the liquid crystal molecule whose rotational directions are changed respectively by two electric field directions, and face to two up and down vertical directions such as the liquid crystal molecule 8 when electric field is applied, and thus, since the characteristic optical characteristics of two directions is averaged, the gradation inversion is eliminated.

6. 发明专利

JPH09105925A LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH09105925A
公开(公告)日：1997-04-22
申请号：JP26385995
申请日：1995-10-12
申请人： HITACHI LTD
发明人： ARAYA SUKEKAZU , UMEDA HIROYUKI , KAGAWA HIROYUKI , YOKOKURA HISAO , KONDO KATSUMI , MATSUYAMA SHIGERU , OE MASATO
IPC分类号： G02B5/20 , G02F1/1333 , G02F1/1335 , G02F1/1343
摘要： PROBLEM TO BE SOLVED: To obtain a liquid crystal display device having a wide visual field angle, a high contrast and less unequal display by providing one substrate of a pair of substrates with plural electrodes, protective films formed on these plural electrodes and insulating films formed in the recessed parts on these protective films in order to make the thickness of a liquid crystal uniform. SOLUTION: This liquid crystal display device is provided with a pair of the substrates and the liquid crystal layer 8 held between a pair of the substrates. At least one substrates of a pair of the substrates are provided with the plural electrodes 3, the protective films 4 formed on the plural electrodes 3 and the insulating films formed in the recessed parts on the protective films 4 in order to make the thickness of the liquid crystal uniform. The change in the thickness of the liquid crystal layer is preferably confined to

7. 发明专利

JPH0980424A ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0980424A
公开(公告)日：1997-03-28
申请号：JP23231495
申请日：1995-09-11
申请人： HITACHI LTD
发明人： OE MASATO , ARAYA SUKEKAZU , ITO OSAMU , KONDO KATSUMI
IPC分类号： G02F1/1335 , G02F1/1343 , G09F9/30
摘要： PROBLEM TO BE SOLVED: To prevent coloration in spite of direct viewing from a diagonal direction by applying electric fields on a substrate by electrode group in parallel therewith and providing the liquid crystal display device with double refractive media for compensating the increase and decrease of the retardation of a liquid crystal layer in case of inclination between the substrate and polarizing plate. SOLUTION: Thin-film transistor are formed on the one substrate. A scanning electrode driving circuit 18, a signal electrode driving circuit 19 and a common electrode driving circuit 20 are connected to their electrodes. Color filters 23 attached with a black matric 22 are formed on another substrate. The transverse electric field type liquid crystal display device is arranged with the double refractive medium (phase substrate) having a phase difference for compensating the increase and decrease of the retardation at the time of inclination of the liquid crystal layer between the substrate and the polarizing plate 8. In this case, the optical axes are so interposed as to erase the mutual phase differences on the front surface if, for example, two phase difference plates 26 are used. Then, the compensation of the increase and decrease of the retardation in case of inclination of the liquid crystal layer is executed by using the difference of the increase out decrease of the different retardations.

8. 发明专利

JPH0980383A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0980383A
公开(公告)日：1997-03-28
申请号：JP23231795
申请日：1995-09-11
申请人： HITACHI LTD
发明人： KONDO KATSUMI , OTA MASUYUKI , OE MASATO
IPC分类号： G02F1/136 , G02F1/133 , G02F1/1333 , G02F1/1335 , G02F1/1368 , G09F9/35 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To obtain a liquid crystal display device which has a wide field angle and a high contrast and is high in the light transmissivity of its liquid crystal panel, bright, and lower in power consumption. SOLUTION: The liquid crystal display device has a couple of substrates 3, plural signal wiring electrodes 12 and scanning wiring electrodes formed on the substrates, and a liquid crystal composition layer sandwiched between the couple of substrates, and in this device, signal wiring electrodes 12 and scanning wiring electrodes cross each other in matrix to form plural pixels and an active element which turns on and off a pixel electrode 1 in a pixel is formed in the pixel. When the active element is turned on, an electric field is applied between the scanning wiring electrode 1 and a reference electrode 2 almost in parallel to the substrate surface, and a scanning wiring electrode driving circuit which supplies a scanning signal having a nonselective voltage in more than binary notation is connected to the scanning wiring electrode and a signal wiring electrode driving circuit which supplies an image signal is connected to the signal wiring electrode 12.

9. 发明专利

JPH08327978A ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH08327978A
公开(公告)日：1996-12-13
申请号：JP13140495
申请日：1995-05-30
申请人： HITACHI LTD
发明人： OTA MASUYUKI , YANAGAWA KAZUHIKO , KONDO KATSUMI , OE MASATO
IPC分类号： G02F1/1343 , G02F1/133 , G02F1/136 , G02F1/1368 , G09G3/36 , H01L21/336 , H01L29/786
摘要： PURPOSE: To obtain a device which has a high opening rate and long service time and prevents the occurrence of a decrease in after-images by connecting counter electrodes to scanning electrodes and impressing an AC voltage nearly positive/negative symmetrical with the non-selecting voltage of scanning voltage as reference on pixel electrodes. CONSTITUTION: The driving of the device is executed by charging and holding the voltage to be impressed on liquid crystals in the pixel electrodes 104 formed in a matrix form by switching active elements. The counter electrodes 105 of this device are connected to the scanning electrodes. Thereby, the scanning electrodes are made to commonly have the role of the counter electrode wirings to supply the voltage to the counter electrodes 105 form outside. The need for the counter electrode wirings is thus eliminated, these regions can be used as opening regions, and the opening rate is improved. The device is so constituted that the AC voltage nearly positive/negative symmetrical with the non- selecting voltage of the scanning voltage as the reference is impressed on the pixel electrodes 105. As the result, the driving of the liquid crystals with the AC voltage is made possible and the service time is improved even if the non- selecting voltage of the scanning voltage is used as the counter voltage.

10. 发明专利

JPH08286211A ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH08286211A
公开(公告)日：1996-11-01
申请号：JP9216895
申请日：1995-04-18
申请人： HITACHI LTD
发明人： YANAGAWA KAZUHIKO , OTA MASUYUKI , KONDO KATSUMI , OE MASATO , UMEDA HIROYUKI
IPC分类号： G02F1/1335 , G02F1/1343 , G02F1/136 , G02F1/1368 , H01L21/336 , H01L29/786
摘要： PURPOSE: To provide an active matrix type liquid crystal display device which is bright at an effectively high opening rate by forming at least a part of the regions of either or both of pixel electrodes and counter electrodes to a shape at which the incident light on the pixel electrodes and counter electrodes is at least partly condensed to the apertures between the pixel electrodes and the counter electrodes by the reflection on electrode surfaces. CONSTITUTION: This liquid crystal display device has the pixel electrodes 104 and counter electrodes 105 arranged in such a manner that nearly parallel electric fields are impressed on substrate surfaces. The sectional shape of either or both of the pixel electrodes 104 and the counter electrodes 105 is formed to the shape at which the incident light on the pixel electrodes 104 and the counter electrodes 105 is at least partly condensed to the apertures between the pixel electrodes 104 and the counter electrodes 105 by the reflection on electrode surfaces. The light reflection surfaces having the shape capable of at least partly condensing the incident light on the pixel electrodes 104 and the counter electrodes 105 to the apertures between the pixel electrodes 104 and the counter electrodes 105 are formed between at least either or both of the pixel electrodes 104 and the counter electrodes 105.

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