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1. 发明专利

JPH09101510A REFLECTION TYPE LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH09101510A
公开(公告)日：1997-04-15
申请号：JP25794095
申请日：1995-10-04
申请人： SHARP KK
发明人： KIMURA TADASHI
IPC分类号： G02F1/1333 , G02F1/1335 , G02F1/136 , G02F1/1368 , G09F9/30
摘要： PROBLEM TO BE SOLVED: To provide a reflection type liquid crystal display device and its production method by which a device can be rather easily formed at a low cost and a bright display can be obtd. SOLUTION: Plural light-shielding members 50, gate electrodes 40 and gate wires are patterned at one time on a light-transmitting substrate 35. A photosensitive resin film is formed to cover the light-shielding members 50, TFT element 36 and gate wires and exposed to light through the opposite side of the substrate 35 to the photosensitive resin film side by using the light-shielding members 50 as a mask. The resin film is developed to form a first insulating film comprising the photosensitive resin film remaining on the substrate. Then a second insulating film having contact holes 37C is formed to cover the first insulating film to form an insulating layer 37 comprising the first and second insulating films. A light-reflecting electrode 38 is formed to cover at least a part of the insulating layer 37. On the surface of the electrode 38, a projected part 38a and a recessed part 38b are formed due to the photosensitive resin film formed by using the light-shielding members 50 as a mask.

2. 发明专利

JPH07175034A LIQUID CRYSTAL ELECTRONIC DEVICE AND ITS DRIVING METHOD 失效
公开(公告)号：JPH07175034A
公开(公告)日：1995-07-14
申请号：JP32033593
申请日：1993-12-20
申请人： SHARP KK
发明人： SAWAYAMA YUTAKA , KIMURA TADASHI , YAMAMOTO YOSHITAKA , ISHII YUTAKA
IPC分类号： G02F1/13 , G02F1/133 , G02F1/1335 , G02F1/13363 , G02F1/139 , G09G3/20 , G09G3/36
摘要： PURPOSE:To obtain a liquid crystal electronic device having sufficient high-speed responsiveness. CONSTITUTION:A sufficient on-off ratio is not obtainable under a condition 1 and there is no change from a display made to be responded near the threshold of the conventional TN type, etc., under a condition 2 and further, the sufficient response of liquid crystal display is optically obtd. even if the displacement of liquid crystal molecules is slight under a condition 3 in the case of driving by impressing the impression voltage from a driving voltage supply section 27 to picture elements by a field sequential system in such a manner that the optical on-off is executed between the impression voltages between the increase of the light transmittance and the decrease of the light transmittance in three ways of impression voltage-transmittance characteristics; the condition 3: dXDELTAn lambda/2 in the retardation (dXDELTAn) which is a difference in the travelling distance of light between an ordinary light component and extraordinary light component in the case whose light for irradiation passes a liquid crystal layer 24 if the thickness of the liquid crystal layer 24 held by both substrates 22, 23 is defined as (d), the refractive index difference between the ordinary light and the extraordinary light as DELTAn and the wavelength of the light for irradiation of display as lambda.

3. 发明专利

JPH06175126A REFLECTION TYPE LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH06175126A
公开(公告)日：1994-06-24
申请号：JP33181092
申请日：1992-12-11
申请人： SHARP KK
发明人： NAKAMURA HISAKAZU , MITSUI SEIICHI , KIMURA TADASHI
IPC分类号： G02F1/1335
摘要： PURPOSE:To make bright display by obtaining scattered light having directivity. CONSTITUTION:An org. insulating film 42 is formed to cover gate bus wirings, source bus wirings and TFTs 40 formed on one substrate 31 of the reflection type liquid crystal display device 30. Projecting parts 42a which are convergent and are formed to a spherical shape at the fronts are formed in the regions of this org. insulating film 42 where reflection electrodes 38 are formed. These projecting parts 42a are so patterned that the average angle; thetaAV of inclination is within a 4 to 15 deg. range. The scattered light having the directivity is obtd. by deciding the average angle thetaAV of inclination is within the 4 to 15 deg. range and, therefore, the extremely bright display is realized.

4. 发明专利

JPH0572534A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0572534A
公开(公告)日：1993-03-26
申请号：JP23807491
申请日：1991-09-18
申请人： SHARP KK
发明人： MITSUI SEIICHI , NAKAMURA KOZO , KIMURA TADASHI
IPC分类号： G02F1/1337 , G02F1/137
摘要： PURPOSE:To obtain a display of a high contrast by lowering of transmittance when a voltage is not impressed. CONSTITUTION:Oriented films are treated by a rubbing orientation treatment in such a manner that the pretilt angle (delta) defined by the angle of the direction perpendicular to substrates attains 20 to 50 deg.. A liquid crystal having an angle (delta) of the liquid crystal molecules with the upper and lower substrates of light transparent substrates contains at least one kind of liquid crystal compsns. which are chiral nematic of a guest-host type, have

5. 发明专利

JPH04134323A OPTICAL WRITING TYPE LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH04134323A
公开(公告)日：1992-05-08
申请号：JP25598090
申请日：1990-09-26
申请人： SHARP KK
发明人： FUJIWARA SAYURI , KIMURA TADASHI
IPC分类号： G02F1/1347 , G02F1/1333 , G02F1/1335 , G02F1/135
摘要： PURPOSE:To extremely facilitate the formation of a reflection layer and to simplify cell constitution by forming the reflection layer of a high-polymer film of a cholesteric liquid crystal having circular polarization dichromaticity. CONSTITUTION:This liquid crystal display element has a 1st transparent substrate 21a, a 1st transparent electrode layer 22a formed thereon, a photoconductor layer 23 formed thereon, a light absorptive layer 24 formed thereon, the reflection layer 25 which is formed thereon and consists of the high-polymer film of the cholesteric liquid crystal, a 2nd transparent substrate 22b, a 2nd transparent electrode layer 21b formed thereon, and the liquid crystal layer 26 inserted between this transparent electrode layer 21b and the reflection layer 25. Such reflection layer 25 is formed of the high-polymer film of the cholesteric liquid crystal having circular polarization dichromaticity in such a manner and, therefore, the formation of the reflection layer 25 is extremely facilitated and the process for production over the entire part is simplified. The cell constitution is simplified as well.

6. 发明专利

JPH0453928A OPTICAL WRITE TYPE LIQUID CRYSTAL ELEMENT 失效
公开(公告)号：JPH0453928A
公开(公告)日：1992-02-21
申请号：JP16364590
申请日：1990-06-21
申请人： SHARP KK
发明人： HATANO AKITSUGU , KIMURA TADASHI
IPC分类号： G02F1/135
摘要： PURPOSE:To suppress the DC voltage component from being applied to a liquid crystal layer, and also, to form the image having high contrast by allowing a photoconductive layer to have a back-to-back diode structure. CONSTITUTION:The back-to-back diode structure is used for a photoconductive layer 4, therefor, in a dark state, since the impedance of the diode structure part of a reverse bias is higher than that of a liquid crystal layer 9, a voltage is scarcely applied to the liquid crystal layer 9. In a bright state, the photoconductive layer 4 becomes low impedance by its photoelectric effect, and becomes lower impedance than that of the liquid crystal layer 9, therefore, the greater part of the voltage applied between electrodes is applied to the liquid crystal layer 9. Accordingly, as for the applied voltage to the liquid crystal layer 9, not only a sufficiently large ON/OFF voltage ratio is obtained in bright/dark states, but also, a difference by polarity of the applied voltage is nearly eliminated in the case an AC is applied between the electrodes. In such a manner, not only the image having high contrast can be formed, but also a DC voltage component is not applied to the liquid crystal layer 9.

7. 发明专利

JPH035729A FERROELECTRIC LIQUID CRYSTAL ELEMENT AND OPTICAL WRITE TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH035729A
公开(公告)日：1991-01-11
申请号：JP13995989
申请日：1989-06-01
申请人： SHARP KK
发明人： KIMURA TADASHI , HATANO AKITSUGU
IPC分类号： G02F1/1337 , G02F1/133 , G02F1/135 , G02F1/136 , G02F1/1365
摘要： PURPOSE:To prevent application of a DC voltage to a liquid crystal layer to deteriorating of a characteristic by forming Schottky junction in a photoconductor layer. CONSTITUTION:Schottky junction is formed on both surfaces of the photoconductor layer 53. Therefore, current-voltage characteristics of the photoconductor layer 53 in a dark and a bright state do not indicate rectification characteristics, so even when a liquid crystal layer 57 is connected in series with this structure, no DC voltage is applied to the liquid crystal layer 57. Further, the ratio of conductivity in the dark state and conductivity in the light state is 2 - 3 digits higher than that in case of ohmic junction, so the liquid crystal layer 57 can be caused to has sufficient optical variation. Consequently, no DC voltage is applied to the liquid crystal layer 57, neither the decomposition of a liquid crystal material itself nor the adsorption of ion components in the liquid crystal to the surfaces of orienting films 55a and 55b is caused, and the disorder of orientation is not caused. Consequently, the ferro-electric liquid crystal element which deteriorates in characteristics owing to said phenomena is obtained.

8. 发明专利

JPH02187729A PROJECTING TYPE DISPLAY DEVICE 失效
公开(公告)号：JPH02187729A
公开(公告)日：1990-07-23
申请号：JP718289
申请日：1989-01-14
申请人： SHARP KK
发明人： KIMURA TADASHI
IPC分类号： G02F1/133 , G02F1/1347
摘要： PURPOSE:To form a picture without distortion on the screen of a projecting type display device by varying the first layer of a two-layer type liquid crystal cell from a second layer in the size of the picture elements of the liquid crystal cells based on optical axial distances to the projecting screen. CONSTITUTION:As for the projecting type display device using the two-layer type liquid crystal cell 20 consisting of the liquid crystal cells 21 and 22, light beams from a light source 32 are collimated and irradiate the two-layer type liquid crystal cell 20 by a condenser lens 31, and the light transmitted through the two-layer type liquid crystal cell 20 is enlarged and projected on the screen 34 by a projecting lens 33. The picture position A of the liquid crystal layer of the liquid crystal cell 21 being the first liquid crystal layer of the two-layer liquid crystal 20 is apart from the picture position B of the liquid crystal layer of the liquid crystal cell 22 being the second liquid crystal layer by deltaa which is the total thickness of the glass substrate. Therefore, considering the influence of the distance deltaa, the size of the picture elements of the liquid crystal cell 22 of the second layer is set larger than that of the liquid crystal cell 21 of the first layer. Consequently, the size of the projecting pictures formed by both liquid crystal cells 21 and 22 can be the same of the screen 34, where the picture without distortion can been seen.

9. 发明专利

JPH01147432A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH01147432A
公开(公告)日：1989-06-09
申请号：JP30618487
申请日：1987-12-03
申请人： SHARP KK
发明人： HAYASHI MARIKO , KIMURA TADASHI , ICHIMURA SACHIKO
IPC分类号： G02F1/133 , G02F1/1335 , G02F1/13363 , G02F1/1347 , G02F1/139
摘要： PURPOSE:To enable color display with good color reproducibility at a high contrast ratio by setting the dependency of the refractive index anisotropy on wavelength exhibited by a liquid crystal layer of the 1st layer larger than the dependency of the refractive index anisotropy on wavelength exhibited by the liquid crystal layer of the 2nd layer. CONSTITUTION:The spiral twist directions of the liquid crystal molecules of the liquid crystal layers 4 are set reverse with upper and lower substrates 1 in respective cells. The lowest transmittance and the high contrast ratio are obtd. by forming the 1st layer and the 2nd layer so as to have the equal value of DELTAn.d (DELTAn: double refraction, d: layer thickness). The dependency of DELTAn on wavelength of the liquid crystal to be put into the 1st layer is set larger than the same dependency of the liquid crystal of the 2nd layer. The sharp color image is thereby obtd. in the display system using the twisted nematic liquid crystal layer having 90 deg. orientation or >=180 deg. orientation.

10. 发明专利

JPS6432233A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPS6432233A
公开(公告)日：1989-02-02
申请号：JP18826487
申请日：1987-07-28
申请人： SHARP KK
发明人： HATANO AKITSUGU , NAKAGAWA KENICHI , KIMURA TADASHI
IPC分类号： G02F1/1343 , G02F1/1335 , G09F9/35
摘要： PURPOSE:To obtain a good contrast without decreasing the opening rates of respective picture elements by forming a transparent conductive film and colored light transparent members on one transparent substrate and further forming a 2nd transparent conductive film thereon so as to cover the colored light transparent members. CONSTITUTION:An ITO film 13 which is the 1st transparent conductive film is formed on the surface of the transparent substrate 12 and color filters 14 are patterned and formed on this film 13. An ITO film 15 which is the 2nd transparent conductive film is then formed to cover the film 13 and the filters 14 and is connected to the film 13 between the respective filters 14. Transparent electrodes 30 are formed to include these films 13, 15. The resistance value of the electrodes 30 is thereby lowered to about a desired value without decreasing the opening rate of the filters 14. The sharp change of the light transmittance near the voltage of the threshold value at which the optical characteristics of a liquid crystal 24 changes is, therefore, enabled. The good color display is thus executed even in the case of executing high time-division driving by increasing the number of the transparent electrodes.

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