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1. 发明专利

JPH11237634A ELLIPTIC POLARIZING PLATE FOR LIQUID CRYSTAL DISPLAY 失效
公开(公告)号：JPH11237634A
公开(公告)日：1999-08-31
申请号：JP31633398
申请日：1998-11-06
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： HIRAKATA JUNICHI , KONDO KATSUMI , ABE HIDETOSHI , ITO OSAMU , HIYAMA IKUO , KITAJIMA MASAAKI , KOMURA SHINICHI , SUZUKI KENKICHI , KIKUCHI NAOKI , MADOKORO HITOMI
IPC分类号： G02F1/133 , G02B5/30 , G02F1/1333 , G02F1/1335 , G02F1/13363
摘要： PROBLEM TO BE SOLVED: To provide an elliptic polarizing plate for field effect type liquid crystal display with which contrast is made high and the characteristics of the field of view are made satisfactory or uniformity in display is improved by tightly laminating elliptic polarizing plates in the shape of sandwich with specified protecting films. SOLUTION: Elliptic polarizing plates 1 are tightly laminated in the shape of sandwich with transparent protecting films 3, this protecting film 3 has birefringency, its phase delay axis 4 crosses an absorption axis 2 of the elliptic polarizing plate 1, and its phase difference is 0.005 to 0.25 μm. This protecting film 3 is composed of at least two transparent organic polymer films having birefringency, and concerning at least two films, the films having phase differences smaller than the phase difference of each single film can be used. In this case, as the protecting film (birefringent medium) 3, one triacetyl cellulose film is arranged outside a substrate 5, but it may be arranged between the substrate 5 and a liquid crystal layer 7 or between a substrate 9 and the liquid crystal layer 7 as well.

2. 发明专利

JPH1164840A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1164840A
公开(公告)日：1999-03-05
申请号：JP22267797
申请日：1997-08-19
申请人： HITACHI LTD , HITACHI DEVICE ENG , NITTO DENKO CORP
发明人： HIYAMA IKUO , KONDO KATSUMI , HIRAKATA JUNICHI , MADOKORO HITOMI , MOTOMURA HIRONORI , KAMEYAMA TADAYUKI
IPC分类号： G02B5/30 , G02F1/133 , G02F1/1333 , G02F1/1335 , G09F9/35
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device with which view angle characteristics are compensated on the light incident side of a liquid crystal display element and a display image is not colored when a display panel is watched from oblique direction. SOLUTION: This device is provided with a pair of transparent substrates 1 and 2, a liquid crystal layer 3 held between a pair of transparent substrates 1 and 2, electrodes 81 -83 formed on the transparent substrate 2, a liquid crystal display element 10 composed of a polarizing board 5 arranged on one transparent substrate 1 between a pair of transparent substrates 1 and 2 and a reflection type polarizing board 13 arranged on the light incident side of the liquid crystal display element 10. The reflection type polarizing board 13 is composed of a costeric film 12 arranged on the light incident side and a birefringent medium 11 operated as a 1/4 wavelength board arranged on the side of the liquid crystal display element 10 and when the retardations of the liquid crystal layer 3 and the birefringent medium 11 in the direction oblique to a display screen are respectively defined as ΔL and ΔR in the case of transmitting light through the liquid crystal layer 13, a sum |ΔL|+|ΔR| of these respective absolute values is larger than an absolute value |ΔL+ΔR| of that sum.

3. 发明专利

JPH09113904A LIQUID CRYSTAL DISPLAY DEVICE AND ITS DIFFUSING PLATE 失效
公开(公告)号：JPH09113904A
公开(公告)日：1997-05-02
申请号：JP27283595
申请日：1995-10-20
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： HIRAKATA JUNICHI , FUJII TATSUHISA , FUMIKURA TATSUNORI , MADOKORO HITOMI
IPC分类号： G02B5/02 , G02F1/1335 , G02F1/13357
摘要： PROBLEM TO BE SOLVED: To improve viewing characteristics and to display an image of high quality by laminating the diffusing plate which has refractive index anisotropy and also has the axis of an extraordinary light component of the refractive index oriented disorderly on the display light projection side of a liquid crystal. SOLUTION: The liquid crystal cell 2 is constituted by sandwiching a liquid crystal layer 2c across spacers between a couple of transparent glass substrates 2a and 2b which are equipped with electrodes and arranged opposite each other, and polarizing plates 2d and 2e are provided so that the liquid crystal 2 is sandwiched. This liquid crystal display device consists of the diffusing plate 1 which diffuses transmitted light passed through the liquid crystal layer 2c, a control circuit which applies a voltage between the electrodes to vary the quantity of transmitted light of the liquid crystal layer 2c, and a driving circuit which generates a voltage waveform for varying the quantity of transmitted light of the liquid crystal. Here, the diffusing plate 1 has refractive index anisotropy and is formed of a high polymer material whose mean axial direction of the extraordinary light component of the refractive index in the thickness direction of the diffusing plate 1 is oriented disorderly. This diffusing plate 1 refracts the projection light from the liquid crystal cell 2 to various directions to widen the viewing angle.

4. 发明专利

JPH08136939A LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH08136939A
公开(公告)日：1996-05-31
申请号：JP23261595
申请日：1995-09-11
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： FUMIKURA TATSUNORI , FUJII TATSUHISA , HIRAKATA JUNICHI , MADOKORO HITOMI , OHIRA TOMOHIDE
IPC分类号： G02F1/1343
摘要： PURPOSE: To lessen the shadowing (unequal luminance) which arises on a screen by the crosstalks in pulse driving of liquid crystals and to improve display quality by providing the above device with auxiliary metallic electrodes between transparent electrodes and electrode substrates, thereby lowering wiring resistance. CONSTITUTION: A black matrix 33D is formed on the lower electrode substrate 12. Resins contg. pigments are formed in prescribed colors and arrangement in the apertures of a black matrix 33D, by which color filters 33 are formed. Next, a flattening film 76 consisting of a resin, such as polyimide or epoxy, is formed. Metallic films consisting of one later or plural layers of Al, etc., are formed atop 77 this flattening layer 76 to form the auxiliary metallic electrodes 1. The auxiliary metallic electrodes 1' are formed on the upper electrode substrate 11 as well except that there are no black matrix, color filters and flattening film. Transparent electrodes 32, 31 are respectively formed on the auxiliary metallic electrodes 1, 1'.

5. 发明专利

JPH0667145A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0667145A
公开(公告)日：1994-03-11
申请号：JP22382492
申请日：1992-08-24
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： TERAO HIROSHI , KONDO KATSUMI , NAKADA TADAO , OHARA SHUICHI , HIYAMA IKUO , KITAJIMA MASAAKI , SUZUKI KENKICHI , MADOKORO HITOMI
IPC分类号： G02F1/133 , G02F1/1335 , G02F1/13363 , G02F1/1362 , G02F1/139
摘要： PURPOSE:To obtain a low voltage driving liquid crystal display device which has multigradation and can be driven by a low voltage driving circuit. CONSTITUTION:To bring a range of twist angle 14 of a nematic liquid crystal layer between 95 deg. and 150 deg., to use phase difference plates 20, 21 with 0.005mum

6. 发明专利

JPH11174448A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11174448A
公开(公告)日：1999-07-02
申请号：JP34513297
申请日：1997-12-15
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： FUMIKURA TATSUNORI , MADOKORO HITOMI , OGAWA KAZUHIRO , KOBAYASHI SETSUO
IPC分类号： G02B6/00 , F21V8/00 , G02F1/1335 , G02F1/13357 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of displaying an image of an arbitrary color tone with uniform brightness over almost whole effective display area of the liquid crystal display device by a simple configuration. SOLUTION: This device consists of a liquid crystal display element 1 provided with a pair of transparent substrates 3 and 4, a liquid crystal 5 filled between the pair of transparent substrates 3 and 4, polarizing plates 6 and 7 arranged on the outside surfaces of the pair of transparent substrates 3 and 4, and a backlight device 2 comprising a linear light source 11, a light guide plate 10 having the linear light source 11 arranged on one side face thereof, a diffuser 9 arranged on one main surface on the side of the liquid crystal display element 1 of the light guide plate 10, and a reflecting plate 12 arranged on another main surface of the light guide plate 10. In this case, the one surface of the reflecting plate 12 facing the light guide plate 10 is made to chromatic planes 151 -154 of which color density is successively lightened according to a distance from the linear light source 11.

7. 发明专利

JPH11119212A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11119212A
公开(公告)日：1999-04-30
申请号：JP28711797
申请日：1997-10-20
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： OGAWA KAZUHIRO , MADOKORO HITOMI , FUMIKURA TATSUNORI , NISHIZAWA SHIGEKI
IPC分类号： G02F1/1335 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To suppress the fluctuation in liquid crystal gap accompanying resticking of polarizing plates and to maintain a high-quality video image display, by specifying the strength of adhesion of adhesive layers for adhering first and second polarizing plates respectively to first and second substrates to the a specified value. SOLUTION: The polarizing plates POL1, POL2 are adhered to the outside surfaces of the first and second substrates SUB1, SUB2 and a liquid crystal compsn. is sealed into the bonding spacing of the first and second substrates SUB1, SUB2 to form a liquid crystal layer LC. The peripheries thereof are then adhered by seals SL to integrate the liquid crystal panel. If the strength of adhesion between the polarizing plates and the substrates or the transparent conductive films formed on the substrates is too large in the work of peeling the polarizing plates POL1, POL2 in case of the occurrence of a trouble, the liquid crystal gap after peeling changes and luminance unevenness occurs. The occurrence of the defect by the occurrence of the fluctuation in the liquid crystal gap in the peeling work is prevented by setting the strength of adhesion to adhere the first and second substrates SUB1, SUB2 and the first and second laminated polarizing plates POL1, POL2 so as not to exceed 1000 (g/20 mm).

8. 发明专利

JPH1010537A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1010537A
公开(公告)日：1998-01-16
申请号：JP16196496
申请日：1996-06-21
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： MADOKORO HITOMI , FUJII TATSUHISA , HIRAKATA JUNICHI , FUMIKURA TATSUNORI
IPC分类号： G02B5/20 , G02F1/133 , G02F1/1333 , G02F1/1335 , G02F1/1337
摘要： PROBLEM TO BE SOLVED: To lessen the unequal luminance and unequal display of a liquid crystal display device arising from a difference in the effective voltage impressed on a liquid crystal layer, to attain higher-speed response and to avert the degradation in a contrast ratio and the transmittance of a bright display. SOLUTION: This liquid crystal display device is constituted by holding a liquid crystal layer 6 provided with a spiral structure having continuously changing angles of inclination of liquid crystal molecules between a pair of substrates 3A and 3B which respectively have striped electrodes 4A, 4B and oriented films 3A, 3B, are provided with color filters 8 of plural colors on one thereof while the substrates are combined to a matrix form by intersecting respective transparent electrodes. The display device is supplied with voltage from the ends of the substrates. The average angles of inclination formed by the liquid crystal molecules constituting the liquid crystal layer 6 at the time of non-impression of the voltage and the boundaries of a pair of the transparent conductive films 5A, 5B are varied within at least one of the substrates and the angles of inclination are changed in the stripe direction of the transparent electrodes.

9. 发明专利

JPH08262410A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH08262410A
公开(公告)日：1996-10-11
申请号：JP6227895
申请日：1995-03-22
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： MADOKORO HITOMI , FUJII TATSUHISA , OHIRA TOMOHIDE , FUMIKURA TATSUNORI
IPC分类号： G02F1/1333 , G02F1/133 , G02F1/1335 , G02F1/1343
摘要： PURPOSE: To provide a liquid crystal display device of a scattering type which is capable of making bright and high-speed response display having a high contrast ratio even in high time-sharing driving and is low in threshold voltage and excellent in stability. CONSTITUTION: This liquid crystal display device is formed by holding a liquid crystal layer 4 between transparent insulating substrates 1 and 11, disposing transparent electrodes 2, 12 and oriented films 3, 13 on the inside surfaces of these substrates 1, 11, twisting liquid crystals in a thickness direction and specifying the thickness (d) of the liquid crystal layer 4 to =360 deg.C and the viscosity of the liquid crystal material to >=25cPs. Since the twist angle of the liquid crystals is specified to >=360 deg.C, a steep electro-optical characteristic is obtd. and the higher contrast is obtd. In addition, the viscosity of the liquid crystals is low and, therefore, the high-speed response display is possible, and since additives are not used, the threshold voltage is low and the stability is excellent.

10. 发明专利

JPH08211386A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH08211386A
公开(公告)日：1996-08-20
申请号：JP1895895
申请日：1995-02-07
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： FUMIKURA TATSUNORI , FUJII TATSUHISA , MADOKORO HITOMI , OHIRA TOMOHIDE
IPC分类号： G02B6/00 , G02F1/1335 , G02F1/13357
摘要： PURPOSE: To prevent an uneven display by light emitted from a back light irrespective of a simple constitution. CONSTITUTION: As for the liquid crystal display device in which a liquid crystal display substrate 4 and a light transmission plate are arranged on top of each other and for inputting light from at least one end face of the light transmission plate and outputting the light from a surface facing to the liquid crystal display substrate 4, the liquid crystal display substrate 4 incorporates a black matrix layer 15 which is formed around each pixel for the substrate, and also, the substrate 4 is formed so that the size of the opening part area equivalent to the pixel area to the black matrix layer 15 may be in inverse proportion to the intensity of light outputted from the surface of the light transmission plate and passing through the opening part.

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