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31. 发明专利

JPH0593897A LIQUID CRYSTAL PANEL AND ITS DRIVING METHOD, AND OPTICAL VALVE 失效
公开(公告)号：JPH0593897A
公开(公告)日：1993-04-16
申请号：JP25335791
申请日：1991-10-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUBOTA HIROSHI , TAKAHARA HIROSHI , OMAE HIDEKI , MOCHIZUKI HIDEAKI
IPC分类号： G02F1/133 , G02F1/1333 , G09G3/36
摘要： PURPOSE:To provide the optical valve which makes an excellent gradational display and its driving method. CONSTITUTION:A modulation voltage is applied to the substrate electrode or counter electrode of a liquid crystal panel 3. The frequency of the modulation electrode is less than the response frequency of liquid crystal and the amplitude of the modulation voltage is less than the rising voltage of the liquid crystal. The liquid crystal of the liquid crystal panel 3 is macromolecule dispersed liquid crystal. The macromolecule dispersed liquid crystal has hysteresis characteristics, but has variation between transmissivity T1 in the rising of hysteresis by the application of the modulation voltage and transmissivity T2 in the falling and the apparent transmissivity is (T1+T2)/2. Therefore, the optical valve which uses the macromolecule dispersed liquid crystal makes the excellent gradational display under a little influence of the hysteresis.

32. 发明专利

JPH0588158A LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL PROJECTION TYPE TELEVISION FORMED BY USING THIS PANEL 失效
公开(公告)号：JPH0588158A
公开(公告)日：1993-04-09
申请号：JP24901491
申请日：1991-09-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI , MITO SHINYA
IPC分类号： G02F1/1333 , G03B33/12 , G09F9/35
摘要： PURPOSE:To eliminate the need for polarizing plates and to obtain a high-brightness screen as well as to prevent the peeling between the boundaries of a liquid crystal layer by using a high-polymer dispersed liquid crystal for a liquid crystal panel and forming a transparent film between an ITO film constituting a counter electrode and the liquid crystal layer. CONSTITUTION:Picture element electrodes 13, source signal lines 14, etc., are formed on an array substrate 12. The picture element electrodes 13 are formed of transparent electrodes, such as ITO. On the other hand, the counter electrode 15 formed on a counter electrode substrate 11 is also formed of a transparent electrode consisting of ITO, etc., in the same manner as for the picture element electrodes 13. The high- polymer dispersed liquid crystal 16 is crimped between the counter electrode 15 and the picture element electrodes 13. Thin films (transparent films) 17, 18 consisting of a transparent material are formed on the counter electrode 15 and the picture element electrodes 13. The transparent films 17, 18 are so formed that the film thickness d thereof attains about d=lambda/4/n when the central wavelength of the light to be modulated by the liquid crystal panel is designated as lambda and the refractive index of the thin films as n. In this case, the liquid crystal is a high-polymer dispersed liquid crystal and the film thickness thereof is 8 to 15mum.

33. 发明专利

JPH0588156A LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0588156A
公开(公告)日：1993-04-09
申请号：JP24901391
申请日：1991-09-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI , OMAE HIDEKI , MOCHIZUKI HIDEAKI
IPC分类号： G02F1/1333 , G09F9/35
摘要： PURPOSE:To provide the liquid crystal display device which can be made low in power consumption and improved in visual field angle. CONSTITUTION:Macromolecule dispersed liquid crystal is used as the liquid crystal of the liquid crystal panel 84. The ordinary light refractive index no of the liquid crystal in the macromolecule dispersed liquid crystal and the refractive index np of resin are so set that nonot equal to and ¦no-np¦ is 0.01-0.05. The light from a light emitting element 81 is made into a spot light source through a stop 94 and its light is made parallel through a condenser lens 83 and made incident on the liquid crystal panel 84. The liquid crystal panel 84 modulates the light according to a video signal. A display image is seen through magnifying lenses 91 and 92. Therefore, when no= np, the visual field angle becomes large and the range of an excellent observation of a screen becomes wide. Further, the spot light is used as a back light, so the light utilization efficiency of the light source is improved and the power consumption is decreased.

34. 发明专利

JPH0588153A LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY DEVICE FORMED BY USING THIS PANEL 失效
公开(公告)号：JPH0588153A
公开(公告)日：1993-04-09
申请号：JP24901691
申请日：1991-09-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI
IPC分类号： G02B5/18 , G02F1/13 , G02F1/1333 , G02F1/1335 , G03B33/12
摘要： PURPOSE:To extremely increase a contrast and to eliminate the need for polarizing plates and to provide a high-brightness image display. CONSTITUTION:Picture element electrodes 13 are formed of ITO and a counter electrode 15 is formed of a metallic material as a reflection electrode. A diffraction grating 41 is formed of a material having the refractive index coinciding with the ordinary light refractive index n0 of a liquid crystal 21 is formed on the reflection electrode 15. A high-polymer dispersed liquid crystal is used for the liquid crystal 21. The incident light on the liquid crystal panel is made incident from an array substrate 12 side. The n0 and the refractive index of the diffraction grating coincide and, therefore, the diffraction grating disappears when the liquid crystal 21 is in a transparent state. The incident light is scattered and diffracted by the liquid crystal layer when the liquid crystal 21 is in a scattering state. The counter electrode 15 has high smoothness and, therefore, has high reflection efficiency. The incident light is scattered and diffracted at the time of the scattering of the liquid crystal 21.

35. 发明专利

JPH0588152A LIQUID CRYSTAL PANEL AND PRODUCTION THEREOF AND LIQUID CRYSTAL PROJECTION TYPE TELEVISION 失效
公开(公告)号：JPH0588152A
公开(公告)日：1993-04-09
申请号：JP24901591
申请日：1991-09-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI
IPC分类号： G02F1/133 , G02F1/1333 , G02F1/1335 , G02F1/1343 , G03B33/12
摘要： PURPOSE:To provide the liquid crystal panel which has a high contrast, does not require polarizing plates and can be improved in the screen brightness higher by >=2 times than the screen brightness of a TN liquid crystal panel. CONSTITUTION:Black matrixes 17a, 17b are formed via an insulating film 31 on a counter electrode 15. A resin contg. a liquid crystal is injected between an array substrate 12 and a counter electrode substrate 11. A voltage is impressed between the black matrixes 17a and 17b at the time of polymerizing the resin. The liquid crystal between the black matrixes 17a and 17b is fixed in the state of being oriented on the counter electrode 15 by an electric field. The refractive index na of the oriented and fixed liquid crystal is higher than the refractive index nb of the case the resin is polymerized in the state of being not impressed with the electric field. The refractive index of the liquid crystal attains n0 when the voltage is impressed between the counter electrode 15 and picture element electrodes 13. Then, the liquid crystal layer has the larger difference in the light quantity between the scattering state and transparent state of light than na > nb, > nb > no.

36. 发明专利

JPH0580311A LIQUID CRYSTAL PANEL AND PRODUCTION THEREOF AND LIQUID CRYSTAL PROJECTION TYPE TELEVISION 失效
公开(公告)号：JPH0580311A
公开(公告)日：1993-04-02
申请号：JP24103691
申请日：1991-09-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI
IPC分类号： G02F1/13 , G02F1/1333 , G03B21/00 , H04N5/66 , H04N5/74
摘要： PURPOSE:To obtain an extremely high contrast and to provide a good image display. CONSTITUTION:Projecting patterns 15 are formed of a dielectric material on a counter electrode. The liquid crystal in parts A existing between the projecting patterns 15 orients if a signal is impressed to the counter electrode 16 at the time of polymerizing the high-polymer dispersed liquid crystal 17 with UV rays to polymerize the liquid crystal. Electric fields are, however, hardly impressed to the liquid crystal in the parts B and the resin component of the liquid crystal 17 is polymerized in the non-oriented state. The refractive index n1 of the parts A of the liquid crystal 17 and the refractive index n2 of the parts B attain a relation n1

37. 发明专利

JPH0511235A LIQUID CRYSTAL PANEL AND ITS MANUFACTURE, AND LIQUID CRYSTAL PROJECTION TYPE TELEVISION 失效
公开(公告)号：JPH0511235A
公开(公告)日：1993-01-19
申请号：JP16549391
申请日：1991-07-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI
IPC分类号： G02F1/1333 , G03B33/12 , G09F9/35
摘要： PURPOSE:To greatly reduce incident light which travels straight in a panel by generating diffraction gratings when a high polymer dispersed liquid crystal is in scattered mode and to make the contrast high by making the diffraction gratings disappear and transmitting the incident light as it is when the high polymer dispersed liquid crystal is in transmission mode. CONSTITUTION:Counter electrode are formed in an interdigital shape. When the high polymer dispersed liquid crystal 17 is irradiated with ultraviolet rays and polymerized, an AC signal is applied between the interdigital counter electrodes 16a and 16b. Liquid crystal at part. A positioned between the interdigital counter electrodes 16a and 16b is oriented. Nearly no electric field is applied to liquid crystal at a part B and resin components of the liquid crystal are polymerized still in an oriented state. The refractive index na of the part A of the liquid crystal 17 is larger than the refractive index nb of the part B and the parts A and B which differ in refractive index form a repetitive pattern, so the function of the diffraction grating is obtained. When a voltage is applied between the counter electrodes 16a and 16b and a picture element electrode 13, the liquid crystal is oriented at the parts A and B, so na=nb and the diffraction grating disappears.

38. 发明专利

JPH04309922A LIQUID CRYSTAL PANEL AND ITS MANUFACTURE, AND LIQUID CRYSTAL PROJECTION TYPE TELEVISION 失效
公开(公告)号：JPH04309922A
公开(公告)日：1992-11-02
申请号：JP7617291
申请日：1991-04-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI , OMAE HIDEKI
IPC分类号： G02F1/1333 , G02F1/1334 , G02F1/1347 , G09F9/35 , H04N5/74
摘要： PURPOSE:To provide a polymer dispersed liquid crystal panel which has an excellent scattering characteristic in a wide wavelength range. CONSTITUTION:Polymer dispersed liquid crystal layers 15a and 15b are formed between upper and lower array substrates 13a and 13b and a counter electrode layer 14 is formed in the middle between the liquid crystal layers 15a and 15b. The mean particle size of water drop type liquid crystal of the polymer dispersed liquid crystal layer 15a is made different from that of the polymer dispersed liquid crystal layer 15b. The particle sizes are adjusted with the intensity of ultraviolet rays at the time of the setting of the liquid crystal layers or by using a polymer material. The scattering characteristic depends upon the mean particle size of the water drop type liquid crystal and water drop type liquid crystal having two kinds of particle size is formed in one panel to improve the scattering characteristic in the wide wavelength range and also obtain the excellent contrast.

39. 发明专利

JPH04225319A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH04225319A
公开(公告)日：1992-08-14
申请号：JP40772190
申请日：1990-12-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OMAE HIDEKI , TAKAHARA HIROSHI
IPC分类号： G02F1/1333 , G02F1/13 , G03B33/12 , G09F9/35 , H04N9/12
摘要： PURPOSE:To display bright and high-contrast images with the liquid crystal display device which modulates and projects light by utilizing high-polymer dispersed liquid crystal panels. CONSTITUTION:The high-polymer dispersed liquid crystal panels 2 are respectively disposed to the light rays of wavelengths of the respective prescribed ranges separated to blue light, green light and red light by dichroic mirrors 1. The average particle sizes of the liquid crystal drops of the high-polymer dispersed liquid crystal panels 2 vary in correspondence to the wavelengths of the light and are so controlled as to equal scattering performance to the rays of the respective wavelengths. The light rays modulated by the respective high-polymer dispersed liquid crystal panels 2 are projected and displayed as images by projecting lens systems 5 through Schlieren optical systems 3 and 4.

40. 发明专利

JPH04208924A LIQUID CRYSTAL PANEL AND PRODUCTION THEREOF 失效
公开(公告)号：JPH04208924A
公开(公告)日：1992-07-30
申请号：JP31722290
申请日：1990-11-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAHARA HIROSHI , OMAE HIDEKI
IPC分类号： G02F1/1333 , G02F1/1335
摘要： PURPOSE:To obtain the panel which is high in contrast, light in weight and low in cost by forming projections consisting of insulators and a black matrix on the source signal lines of an array substrate, packing a high-polymer dispersed liquid crystal between the projections and forming a counter electrode on the upper layer thereof. CONSTITUTION:The projections 25 consisting of the insulators and the black matrix 24 are formed on the source signal lines 22 of the array substrate 11 and after a liquid crystal soln. is applied on the array substrate 11, a substrate having a release property is superposed on the liquid crystal soln. The panel is then pressurized successively from above the substrate and from the panel end in the direction parallel with the source signal lines 22 on the above substrate, by which the resin is smoothed to a plane shape. The liquid crystal soln. is then irradiated with UV rays, by which the resin in the liquid crystal is polymerized and cured to a polymer 21. The counter electrode 14 consisting of ITO and a protective thin film 15 are thereafter formed after the substrate is peeled. Then, there is no need for the counter substrate and the weight is reduced. In addition, the stage is simple and the liquid crystal panel is produced at a high speed. Further, the leakage of electric fields from the source signal 22 lines, etc., is shut off by the black matrix 24 and the extremely high-contrast images are displayed.

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