WO1994000792A1 - Unite d'affichage a cristaux liquides et projecteur a cristaux liquides l'utilisant - Google Patents
Unite d'affichage a cristaux liquides et projecteur a cristaux liquides l'utilisant Download PDFInfo
- Publication number
- WO1994000792A1 WO1994000792A1 PCT/JP1993/000903 JP9300903W WO9400792A1 WO 1994000792 A1 WO1994000792 A1 WO 1994000792A1 JP 9300903 W JP9300903 W JP 9300903W WO 9400792 A1 WO9400792 A1 WO 9400792A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- display unit
- crystal display
- crystal cell
- polarizing member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
- G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Definitions
- the present invention relates to a structure of a liquid crystal display unit used in a high temperature environment and a structure of a liquid crystal projector.
- a typical example of a technology for optically displaying an image under a high temperature environment using a liquid crystal cell is, for example, a method of illuminating light from behind a liquid crystal panel including a liquid crystal cell and a polarizing plate.
- a liquid crystal projector that irradiates light, forms a projection image with a liquid crystal panel, and enlarges and projects a projection image of a liquid crystal cell with an optical system that is a projection unit.
- FIG. 1 is a schematic view of a conventionally known liquid crystal projector presented in Japanese Patent Application Laid-Open No. 4-27992, in which an air inlet is provided in a part of the container, and the air inlet is provided in the air inlet.
- FIG. 9 is a diagram showing an example in which a dustproof filter 401 is added.
- the transmittance of the polarizing plate 103 is low, the light emitted from the illuminating means 203 composed of the light source means 201 and the condenser lens 202 is used as the polarizing plate 102. At 60, about 60% of the light becomes heat.
- the light source means 201 of the illuminating means 203 has a high luminance, so that the heat generated in the polarizing plate 103 is extremely high.
- the temperature characteristics of the liquid crystal change or deterioration due to high temperature and the polarizing plate deteriorate, and the appearance of the projected image deteriorates and the life of the liquid crystal cell 108 is shortened.
- a liquid crystal display as shown in Fig. 1
- an enclosure means 500 having a closed structure provided with a cooling fan 400 is provided with illumination means 203 mainly composed of a light source lamp 201, a liquid crystal cell 108, and
- the optical system 300 is composed of a projection lens, and the polarizing plate 103 and the liquid crystal cell 108 are separated from each other. This is to cool the polarizer 103 and the liquid crystal cell 108 by forced air cooling to prevent the deterioration of the liquid crystal and the polarizer due to heat.
- a filter 401 for preventing intrusion of dust is installed in front of the cooling fan 400 of the liquid crystal projector, and dust outside the liquid crystal projector enters the liquid crystal projector. And prevent dust from deteriorating the projected image quality.
- the liquid crystal projector could not completely remove the dust that entered when manufacturing the liquid crystal projector and the dust that entered when replacing the lamp, which is a lighting means that had reached its end of life. Dust that has entered the liquid crystal projector due to the wind pressure of the cooling fan in the projector, or vibration or dropping during transportation, flies and adheres to the surface of the liquid crystal cell. If dust adheres to the liquid crystal cell, even small dust is magnified by the optical system serving as the projection lens, so that there is a problem that the quality of the projected image is significantly impaired.
- the liquid crystal projector cannot be easily disassembled due to the structure in which the liquid crystal panel is hermetically sealed by the housing of the liquid crystal projector.
- the Kuta maker had to deal with it using advanced technology and jigs.
- the dust on the liquid crystal cell is removed, the liquid crystal cell is damaged, and the quality of the projected image is significantly impaired.
- An object of the present invention is to improve the above-mentioned drawbacks of the prior art and maximize the cooling effect, and at the same time, prevent dust or the like from adhering to the surface of the liquid crystal cell.
- the present invention provides a liquid crystal display unit having a configuration in which the dust or the like is not detected in an image reproduced optically even if the dust adheres to the surface of the liquid crystal display.
- An object of the present invention is to provide a liquid crystal display unit that can always supply high-quality image while keeping the contrast in the liquid crystal cell unchanged, and further provide a liquid crystal projector using the liquid crystal display unit. .
- the present invention basically employs the following technical configuration to achieve the above object. That is, a liquid crystal display unit comprising at least one liquid crystal cell and at least one polarizing member, wherein a frame provided to form a gap between the polarizing member and the liquid crystal cell; A liquid crystal display unit having a configuration in which a ventilation hole is provided in at least a part thereof, and a filter is provided in at least a part of the ventilation hole, and a liquid crystal projector configured using the liquid crystal display unit. .
- the configuration is a liquid crystal display unit including a first polarizing member, at least one liquid crystal cell, and a second polarizing member.
- a frame provided to form a gap at least between the first polarizing member and the liquid crystal cell or between the liquid crystal cell and the second polarizing member; and at least one of the frame
- a liquid crystal projector having a structure in which a ventilation hole is provided in a part thereof, a filter is provided in at least a part of the ventilation hole, and a liquid crystal display unit having such a structure.
- the liquid crystal display unit according to the present invention has a configuration in which dust does not easily enter the periphery of the liquid crystal cell because the gap between the liquid crystal cell and the polarizing member is covered with the dustproof filter.
- a liquid crystal projector using a unit has a configuration that prevents dust from adhering to the liquid crystal cell even if dust enters during assembly or lamp replacement.
- the liquid crystal display unit even when dust adheres to the outer surface of the polarizing member, a gap is provided between the liquid crystal panel and the polarizing member, and the gap is defined by the optical distance. Since the lens is designed to be outside the depth of focus of the lens that composes the system, even if dust or the like adheres to the surface of the liquid crystal cell, the projected image is not focused because the dust does not focus on the surface. I can't see the dust even if I observe it. Therefore, even if dust adheres to the outer surface of the polarizing member, no effect on the projected image quality is observed.
- the polarizing member can have a structure in which the polarizing plate is closely contacted with, for example, transparent glass, the polarizing plate can be effectively prevented from being deformed by heat, and the glass side is in contact with an outer surface. With such an arrangement, dust and dirt on the outer surface of the polarizing member can be easily cleaned without damaging the polarizing plate.
- FIG. 1 is a schematic cross-sectional view showing an example of a configuration of a conventional liquid crystal display unit and a liquid crystal projector configured using the liquid crystal display unit.
- FIG. 2 is a schematic cross-sectional view illustrating an example of a basic configuration of a liquid crystal display unit according to the present invention.
- FIG. 3 is a cross-sectional view showing an example of the configuration of a passive liquid crystal cell used in the present invention.
- FIG. 4 is a cross-sectional view showing an example of the configuration of a passive liquid crystal cell with a color filter in the liquid crystal cell used in the present invention.
- FIG. 5 is a partially exploded perspective view of c 6 view of an active type liquid crystal cell used in the present invention (A) ⁇ FIG. 6 (C) is employed in the the liquid crystal display Yunitto according to the present invention
- FIG. 4 is a perspective view illustrating a specific example of a frame to be formed.
- FIG. 7 is a cross-sectional view showing a specific configuration example of a liquid crystal display unit according to the present invention, and is a diagram showing an example of the configuration of a liquid crystal projector configured using the liquid crystal display unit.
- FIG. 8 is a sectional view showing a configuration example of another specific example of the liquid crystal display unit according to the present invention.
- FIG. 9 is a cross-sectional view showing a specific configuration example of the liquid crystal display unit configured according to FIG. 8, and a cross-sectional view of a liquid crystal projector configured using the liquid crystal display unit.
- FIG. 10 is a perspective view showing a configuration example of a closed type liquid crystal display unit used in the present invention.
- FIG. 11 is a cross-sectional view for explaining an example of means for connecting a polarizing member to a frame in the present invention.
- FIG. 12 is a cross-sectional view showing an example in which the polarizing member is bonded to a polarizing member support by bonding, and the polarizing member forms an outer surface of the liquid crystal display unit.
- FIG. 13 is a cross-sectional view showing an example in which the polarizing member is bonded to a polarizing member support by bonding, and the polarizing member forms the inner surface of the liquid crystal display unit.
- FIG. 14 is a cross-sectional view illustrating a configuration example of a liquid crystal display unit further provided with a phase correction member according to another embodiment of the present invention.
- FIGS. 15 and 16 show an example in which a phase correction member is arranged in a gap between a first polarizing member and the liquid crystal cell, and the phase correction member is bonded to the surface of the liquid crystal cell.
- FIG. 17 is a cross-sectional view showing an example in which a phase correction member is arranged in a gap between a second polarizing member and the liquid crystal cell, and the phase correction member is bonded to the surface of the liquid crystal cell. .
- FIG. 18 is a cross-sectional view showing an example of a liquid crystal display unit in which first and second phase correction members are bonded and arranged on both front and back surfaces of the liquid crystal cell.
- FIG. 19 shows the liquid crystal display unit shown in FIG.
- FIG. 9 is a cross-sectional view illustrating an example of a method of joining with two phase correction members.
- FIG. 20 is a graph showing the effect when a liquid crystal cell and a phase correction member are used in combination in the present invention.
- FIG. 2 is a cross-sectional view schematically illustrating the basic configuration of the liquid crystal display unit 1 according to the present invention.
- the liquid crystal display unit 1 includes at least one liquid crystal cell 2 and at least one polarizing member 3.
- a frame 5 provided to form a gap 4 between the polarizing member 3 and the liquid crystal cell 2, and a ventilation hole 6 provided in at least a part of the frame 5;
- the configuration of the liquid crystal cell 2 used in the present invention is not particularly limited, but a conventionally known TN type liquid crystal cell, an STN type liquid crystal cell, or the like can be used. Also, as a method of driving these liquid crystal cells, a passive type liquid crystal cell in which a plurality of electrodes are simply arranged in parallel on the respective surfaces of the opposed liquid crystal support members and the electrodes are arranged at right angles to each other between the liquid crystal support members. Alternatively, it is possible to use a so-called active liquid crystal cell in which active elements such as transistors are individually arranged for each pixel of the liquid crystal cell.
- the passive-type liquid crystal cell 100 is provided with a conductive material on an inner surface of each of the substrates 101 and 102 which are arranged to face each other at a predetermined interval by an appropriate sealing member 103.
- a plurality of electrodes 104. 105 composed of a film or the like are arranged in parallel. That is, on the inner surface of the substrate 101, the electrodes 104 composed of a plurality of conductive films are arranged in parallel with each other and covered with an appropriate alignment film 106.
- On the inner surface of the other substrate 102 a plurality of conductive films 105 arranged in parallel to each other in a direction perpendicular to the arrangement direction of the electrodes 104 are provided. And they are covered with an appropriate alignment film 107.
- an appropriate liquid crystal body 108 is filled in a gap between the substrates 101 and 102, and further, the liquid crystal body 108 has a space between the substrates. In order to maintain the appropriateness, a spacer 109 is mixed.
- FIG. 4 shows another example of the configuration of the passive liquid crystal cell.
- the structure is the same as that of the passive liquid crystal cell 100 shown in FIG. 3, except for the conductive liquid crystal cell provided on the inner surface of the substrate 112 as shown in FIG.
- An appropriate color filter 120 is disposed on the membrane 115.
- FIG. 5 shows an example of the configuration of an active liquid crystal cell.
- the configuration of the active liquid crystal cell is such that an active element 122 composed of a transistor or the like is arranged for each pixel electrode 121. Therefore, the pixel electrodes are individually signal-controlled.
- a color filter may be used in combination.
- the configuration of the polarizing member 3 used in the present invention is not particularly limited, and is not generally used. It is possible to use a polarizing member that has been used. Further, the material, thickness, and the like of the polarizing member 3 are not particularly specified.
- polarizing member 3 used in the present invention for example, G122ODU manufactured by Nitto Denko Corporation is suitable.
- the frame 5 used in the liquid crystal display unit according to the present invention will be described.
- the frame has an appropriate space between at least the liquid crystal cell 2 and the polarizing member 3. It has a function of forming, and its size, length, and the like differ depending on the size of the liquid crystal display unit used.
- connection between the frame 5 and the liquid crystal cell 2 is made by an appropriate liquid crystal cell. It is possible to realize this by interposing a metal support part.
- the frame 5 is formed of a plate-like body 11 on four sides so as to completely seal the gap 4 between the liquid crystal cell 2 and the polarizing member 3. It may be made of a member, and in that case, it is desirable to provide the above-described ventilation hole 6 at an appropriate portion of the rod 11.
- the frame 5 has a frame composed of a rod, a rod, a pongee, etc. 12 only in a portion corresponding to the outer peripheral edge of the gap 4. It is also possible to use.
- a suitable shielding member may be attached around the frame portion 12 and a suitable ventilation hole 6 may be provided.
- a shielding member may be provided with a breathable filter made of non-woven fabric or knitted fabric. In such a case, it is not necessary to provide the ventilation holes 6.
- the frame 5 is formed by connecting four peripheral plate portions 13 to each other and forming a trapezoidal frame. It is also possible to use the one that constitutes the body part 5.
- the filter provided in at least a part of the ventilation hole 6 has a function of allowing the air flow to pass easily, but not allowing the problematic dust and the like to pass.
- Any material can be used, for example, a nonwoven fabric, a mesh knitted fabric, or a combination thereof, which has many built-in voids.
- FIG. 7 shows an example of a case where a liquid crystal project 200 is formed using the liquid crystal display unit 1, and the illumination means 203 described above in the drawing is constituted.
- a light source 201, a liquid crystal display unit 1, and a projection optical system 300 are provided on the optical axis in parallel with each other.
- the light emitted from the light source 201 passes through the liquid crystal cell 2 attached to the liquid crystal cell support 10 constituting the liquid crystal display unit 1, and
- the light passes through the polarizing member 3 attached to the frame 5 formed into a shape, enters the optical system 300, and becomes a projected image.
- the trapezoidal frame 5 has a substantially prismatic shape, and has a suitable opening 14 at a portion where the polarizing member 3 is supported and fixed. At approximately the center of 10, an appropriate opening 15 for allowing predetermined light to pass through the liquid crystal cell 2 is provided.
- the liquid crystal display unit 1 is fixed to a part of the housing 500 forming the liquid crystal projector 200 by an appropriate fixing member 17.
- an appropriate ventilation hole 401 is provided in a part of the housing portion 500, and the ventilation hole 400 is provided with: It is desirable to provide forced air circulation means 400 such as an appropriate fan.
- reference numeral 402 denotes an exhaust hole.
- the liquid crystal cell 2 when the liquid crystal display unit 1 according to the present invention is used in the liquid crystal projector 200, the liquid crystal cell 2 is located at a position close to the light source 201 of the liquid crystal projector 200. Since the liquid crystal cell 2 is generally arranged, the liquid crystal cell 2 directly receives the light energy from the light source 201, and the light energy is accumulated in the liquid crystal cell 2, whereby The internal temperature of the liquid crystal cell 2 rises.
- the temperature of the liquid crystal cell 2 if the temperature of the liquid crystal cell 2 is high, the characteristics of the liquid crystal cell 2 are deteriorated and the contrast or the like is lowered.
- the cooling air flow to flow from the ventilation holes 6 of 5 the inner surface of the liquid crystal cell 2 is cooled, and it becomes possible to prevent the temperature of the liquid crystal cell 2 from rising above a predetermined temperature.
- the basic configuration of the liquid crystal display unit 1 according to the present invention described above is that described for the basic structure in which the liquid crystal cell 2 and the polarizing member 3 are each constituted by one.
- a plurality of polarizing members 3 can be used for the liquid crystal cell 2, and a plurality of liquid crystal cells 2 can be used.
- FIG. 8 is a cross-sectional view for explaining the outline of the above configuration.
- a liquid crystal display unit 1 comprising a first polarizing member 31, at least one liquid crystal cell 2, and a second polarizing member 3 is provided.
- a gap 41 or 4 Provided to form a gap 41 or 4 at least between the first polarizing member 31 and the liquid crystal cell 2 or between the liquid crystal cell 2 and the second polarizing member 3.
- a frame 51 or 5 and at least a part of the frame 5K5 are provided with ventilation holes 6 and 6, and at least a part of the ventilation holes 61 and 6 are provided with filters 71 and 7.
- a liquid crystal display unit having the above configuration is shown.
- FIG. 8 is merely an example of the technical configuration of the present invention.
- a configuration in which the cell 2 and any one of the polarizing members 31 or 3 are directly bonded may be employed.
- the gaps 41, 4 may be formed at the same interval, or may be formed by changing the interval as needed.
- FIG. 9 is different from the configuration in FIG. 7 in that the polarizing member 3 of the liquid crystal cell 2 is provided. It has a configuration in which another polarizing member is provided so as to face the surface opposite to the surface on which it exists.
- another frame 5 1 having substantially the same configuration as the frame 5 in FIG. 7 is provided on the light source 201 side of the liquid crystal cell support 10 of the liquid crystal display unit 1 in FIG. attached to, are those which allowed placement of the first polarizing member 3 1 in the opening 4 1 of the frame body 5 1 c
- the polarizing member 3 in FIG. 7 will be referred to as a second polarizing member
- the polarizing member 31 closer to the light source 201 in this specific example will be referred to as a first polarizing member.
- the frame 5 in FIG. 7 is referred to as a second frame, and in this specific example, the frame 5 closer to the light source 201 is referred to as the second frame. 1 is referred to as the first frame.
- FIG. 9 is basically substantially the same as the specific example of FIG. 7, and the liquid crystal display unit 1 is used as a liquid crystal projector.
- FIG. 2 shows an example of a case where 200 is configured.
- a light source 201, a liquid crystal display unit 1, and a projection optical system 300 are installed on the optical axis in parallel with each other.
- the light emitted from the light source 201 is applied to a first polarizing member 3 provided on a trapezoidal first frame 51 attached to a liquid crystal cell support 10 constituting the liquid crystal display unit 1.
- the light passes through the liquid crystal cell 2 supported by the liquid crystal cell support 10, passes through the second polarizing member 3 similarly attached to the frame 5 formed in a trapezoidal shape, and
- the system 300 enters a projection image.
- the first frame 51 formed in the trapezoidal shape has a substantially prismatic shape similarly to the frame 5 described above, and a portion where the first polarizing member 31 is supported and fixed is appropriately It has an opening 141, and the first frame 51 and the liquid crystal cell support 10 are fixed by an appropriate connection means 161.
- liquid crystal display unit 1 is fixed to a part of a housing 500 forming the liquid crystal project 200 by an appropriate fixing member 17.
- an appropriate ventilation hole 401 is provided in a part of the housing portion 500, and the ventilation hole 400 It is desirable to provide forced air circulation means 400 such as an appropriate fan.
- FIG. 10 is a perspective view showing the appearance of the configuration of the liquid crystal display unit 1 of the above specific example according to the present invention, and a joining member for joining and integrating the components of the liquid crystal display unit 1 described above.
- 16, 16 1 are provided, and at least two or more openings 6, 61 are formed on the side surface to allow air to flow into the display unit 1.
- At the edge of the liquid crystal cell support 10 Has a fixed end portion 17 for fixing the liquid crystal cell support 10 to the housing 500.
- the display unit 1 is composed of three members, a first frame 51, a liquid crystal cell support 10, and a second frame 5, and each member is formed of, for example, a resin material.
- the liquid crystal cell support 10 is sandwiched between the first and second frames 5, 51, and the connection end of each frame is fixed by screwing, which is an example of the joining members 16, 16 1. It is formed in a sealed structure.
- the liquid crystal display unit 1 is fixed to the housing 500 by screwing the sandwiched fixing member 17 of the liquid crystal cell support 10 to the housing 500.
- the frames 5, 51 and the liquid crystal cell support 10 may be made of a resin, but may be made of another material such as a metal material or a ceramic material. Can also achieve the object of the present invention.
- the liquid crystal cell 3 is fixed to the liquid crystal cell support 10 with an adhesive member so as to be installed substantially perpendicularly to the optical axis direction.
- the first polarizing member 31 and the second polarizing member 3 are attached to the opening ends 14 and 114 of the frames 5 and 51 on the side opposite to the liquid crystal cell 3 with an adhesive member, respectively. It is also possible to use the polarizing members 3 and 31 having a configuration in which polarizing plates 5 3 and 531 are attached to the surface of transparent glass 52.5 2 1, for example. In such a case, since the polarizing plate is attached to glass that is resistant to heat, deformation of the polarizing plate due to heat is corrected. Also, if a double-sided adhesive tape is used as an adhesive member for bonding the glass member and the polarizing plate, the efficiency of the bonding operation is improved.
- the openings 6, 61 provided on the side surfaces of the prism-shaped frame members 5, 51 for passing air therethrough prevent dust from entering.
- the filter 7, 71 may be provided, for example, the filter having the above-mentioned configuration may be formed by bonding or welding, and thus the liquid crystal display unit may be used.
- the inside of 1 is made to be a sealed structure against dust. As a method of attaching the filter to the frame to prevent dust, adhesion by an adhesive member may be used.
- the liquid crystal cell 2 is driven and projected in the housing 500 of the liquid crystal projector 200.
- a drive circuit 600 for forming an image is provided, and the drive circuit 600 and the liquid crystal cell 2 are connected by a thin flexible printed circuit board (FPC) 600.
- the frame 5, 51 is provided with a notch 54 corresponding to the thickness of the FPC 601, and a filter such as a non-woven fabric is disposed in the notch 54, and at the same time, wiring is performed through the FPC.
- the frames 5, 51 and the liquid crystal cell support 10 are connected and screwed down 16, 16 to form a structure in which the liquid crystal cell 2 is sealed.
- FIG. 10 shows a specific example of a closed structure of a liquid crystal display unit 1 using the liquid crystal cell 2 according to the present invention.
- the housing 500 of the liquid crystal projector 200 is provided with an intake port 401 and an exhaust port 402 for the outside air. Then, air flows into the housing 500 by the cooling fan 400 attached to the housing 500, and is polarized through the filters 7, 71 provided in the frames 5, 51. Plate 3 and liquid crystal cell 2 are air cooled.
- the prism support frames 5 and 51 are used for the structure of the liquid crystal display unit 1 according to the present invention, these shapes may be arbitrary.
- the above description has been made on the case where the liquid crystal display unit 1 according to the present invention includes the prismatic frames 5, 51 supporting the polarizing members 3 and 31 and the liquid crystal cell support 10 supporting the liquid crystal cell 2.
- the liquid crystal display unit 1 according to the present invention includes the prismatic frames 5, 51 supporting the polarizing members 3 and 31 and the liquid crystal cell support 10 supporting the liquid crystal cell 2.
- other structures may be adopted.
- the first polarizing member, the liquid crystal cell, and the second polarizing member are integrally provided in this order with a gap provided therebetween,
- the above-mentioned gaps 4, 41 have a structure having openings 6, 61 so as to allow ventilation with the outside, and the openings 6, 61 are covered with dustproof filters 7, 71.
- the openings 6 and 61 for the ventilation are four places in the entire liquid crystal display unit 1 is shown, but of course the number and the size of the openings are limited. There is no.
- the surface of the liquid crystal cell support 10 facing the light source 201 to which the second frame 5 is not bonded is It is also possible to directly dispose the first polarizing member 31 without providing the frame 51.
- a space formed in the liquid crystal cell support 10, that is, a window 15, is formed between the liquid crystal cell 2 and the first polarizing member 31. It will be.
- liquid crystal cell 2 has been described as being applied to a case where one liquid crystal cell 2 is used in the above specific example, the liquid crystal cell 2 may be used in combination of two or more. It is possible.
- the active type liquid crystal cell is used as the liquid crystal cell 2 because the contrast of the display screen of the liquid crystal display unit composed of the liquid crystal cell is extremely good as compared with other types of liquid crystal cells. Also, the viewing angle can be made larger than other types of liquid crystal cells.
- the polarizing members 3 and 31 is supported by a suitable polarizing member support 18.
- the polarizing member support 18 may be the frames 5, 51 themselves, or may be bonded to the frames 5, 51 in an appropriate form.
- the polarizing members 3 and 31 are fixed and supported on the polarizing member support member 18 by bonding, bonding, fixing, fitting or other appropriate means.
- the polarizing member support 18 is made of a light transmissive material
- the polarizing member support 18 is provided with an opening or a window provided in the frame, 5, 51, It is not necessary to provide an opening or a window for transmitting light in a portion corresponding to 14 and 14 1, and the polarizing members 3 and 31 are directly attached to the polarizing member support 18. It is also possible to adopt.
- FIG. 12 and FIG. 13 can be used to explain another embodiment of the present invention.
- an appropriate adhesive 19 is applied to the outer surface of the polarizing member support 18 so that the surface of the polarizing member 3 constitutes the outer surface of the liquid crystal display unit 1.
- a liquid crystal display unit 1 having a configuration in which the polarizing member 3 is adhered to the liquid crystal display unit 1 is disclosed, and FIG. 13 shows that the surface of the polarizing member 3 corresponds to the inner surface of the liquid crystal display unit 1.
- a liquid crystal display unit 1 having a configuration in which the polarizing member 3 is bonded to the inner surface of the polarizing member support 18 via an appropriate adhesive 19 so as to be configured is disclosed. This configuration can be applied as it is to the liquid crystal display unit 1 having the configuration using the first and second polarizing members 3 and 31 in FIG.
- the polarizing member support member 18 is formed of glass, a heat reflection filter, or an appropriate blast switch.
- the material constituting the polarizing member support 18 is glass
- the glass be a glass having a heat absorbing property, for example, JIS R 3207. It is preferable to use the specified first-class infrared absorbing glass.
- the polarizing member 3 has a structure in which a transparent glass and a polarizing member are laminated.
- the polarizing member 3 is arranged so that the polarizing member side is the outer surface of the liquid crystal display unit 1, and the glass 18 is provided.
- FIG. 12 shows an example in which the side is disposed inside the liquid crystal display unit 1.
- the polarizing plate 3 may be damaged. Therefore, if the glass 18 is arranged so that the glass 18 is located on the outer surface, dust adhering to the glass 18 can be cleaned without damaging the polarizing plate 3, and the effect of the present invention is further enhanced.
- the polarizing member 3 may have a structure in which the polarizing plate 3 is sandwiched between two transparent glass members 18 in a sandwich manner. In this case, it is not necessary to bond the polarizing plate and the glass.
- the material of the liquid crystal cell used in the present invention is not particularly limited with respect to its material, but in order to exhibit more preferable performance as a liquid crystal display unit, it is necessary to use liquid crystal molecules. It is preferable that the liquid crystal is formed of a liquid crystal having a twist angle in the range described below.
- liquid crystal cell which satisfies such conditions, for example, it is desirable to use a super twisted nematic type (STN) liquid crystal.
- STN super twisted nematic type
- the image display characteristics are strongly affected by the temperature.
- the liquid crystal display unit 1 when used in a high-temperature environment, it has led to a problem that the contrast is changed.
- a member made of a light-transmitting material having a temperature characteristic opposite to that of the liquid crystal cell 2 is used in combination as a correction member. It has become possible to solve such problems.
- the liquid crystal display unit 1 As another specific example of the liquid crystal display unit 1 according to the present invention, as shown in FIG. 14, at least one liquid crystal cell 2, at least one polarizing member 3, and at least one phase correcting member 2 are provided. 0, wherein the phase correction member 20 is formed using a light transmissive material having a temperature and a property opposite to those of the liquid crystal cell 2. A liquid crystal display unit is provided.
- the phase correction member 20 is made of a light-transmitting material having a temperature characteristic opposite to that of the liquid crystal cell 2, when the temperature changes, the characteristics change based on the temperature characteristics of the two. By offsetting each other, a flat temperature characteristic can be formed, so that the problem that the color of the image changes even at a high temperature can be avoided.
- phase correction member 20 may be used by being joined to the liquid crystal cell 2 used in the liquid crystal display unit 1, and may be used in such a manner that the phase correction member 20 is provided so as to face through a suitable gap. Is also possible.
- a liquid crystal display unit 1 comprising one phase correcting member 20, at least between the polarizing member 3 and the liquid crystal cell 2 or between the liquid crystal cell 2 and the correcting member 20 or between the polarizing member 3 and the polarizing member 3.
- a frame 5 that forms an air gap between the phase correction member 20 and a ventilation hole 6 is provided in at least a part of the frame 5, and a filter 7 is provided in at least a part of the ventilation hole 6.
- the phase correction member 20 is provided adjacent to or joined to either the polarizing member 3 or the liquid crystal cell 2, or the phase correcting member 20 is provided between the polarizing member 3 and the liquid crystal cell 2.
- a liquid crystal display unit characterized in that it is provided in a void portion 4 formed between the two.
- the specific example of the present invention has a configuration in which a phase correction member 20 is added to the basic configuration of the liquid crystal display unit according to the present invention shown in FIG.
- a phase correction member 20 is added to the basic configuration of the liquid crystal display unit according to the present invention shown in FIG.
- several modes can be considered.
- the phase correction member 20 is arranged on the outer surface of the liquid crystal cell 2, that is, on the side close to the light source when incorporated in the liquid crystal projector.
- the liquid crystal cell 2 and the phase correction member 20 are closely bonded to each other.
- the liquid crystal cell 2 and the phase correction member 20 may be arranged at a predetermined distance from each other.
- phase correction member 20 is arranged on the opposite side of the liquid crystal cell 2 on the opposite side of the polarizing member 3 to be in close contact with the liquid crystal cell 2 or via a predetermined gap. It may be disposed close to the polarizing member 3 or bonded to the polarizing member 3.
- the phase correction member 20 is connected to the liquid crystal cell 2.
- the surface of the liquid crystal cell 2 facing the light source 200 of the liquid crystal projector is preferably used as the phase correction member. It is desirable that 20 is arranged so as to cover c Then, it is desirable to cool the surface of the phase correction member 20 by cooling air.
- the thickness of the phase correction member 20 according to the present invention is not particularly limited. However, when the liquid crystal display unit 1 is used as a liquid crystal display unit of a liquid crystal projector, the thickness is not particularly limited. If the outer surface of the phase correction member 20 is designed to be outside the depth of focus of the projection lens of the liquid crystal projector, even if dust or the like adheres to the outer surface of the phase correction member 20, Dust and the like are not detected on the projected image,
- a liquid crystal display unit 1 which is arranged in at least one phase correction member 20, at least one liquid crystal cell 2 and a second polarizing member 3, and in this order along a force and an optical axis; Either between the second polarizing member 3 and the liquid crystal cell 2, or between the liquid crystal cell 2 and the phase correcting member 20, or between the phase correcting member 20 and the first polarizing member 31.
- Frames 5 and 5 1 forming voids 4 and 41 between them, and ventilation holes 6 and 61 provided in at least a part of the frames 5 and 51, wherein the ventilation holes 6 and 6 are provided.
- 1 is a liquid crystal display unit in which filters 7 and 71 are provided at least in part.
- a filter 71 is provided in the ventilation hole 61 of the gap 41, and the cooling air is forced to flow through the gap 41.
- a gap 41 formed between a first polarizing member 31 and a phase correcting member 20 is formed.
- the filter 71 is not provided in the ventilation hole 61 provided in the frame 51 for performing the above operation. If the outer surface is designed to be out of the depth of focus range of the projection lens in the LCD project For example, even if dust or the like adheres to the outer surface of the phase correction member 20, the dust or the like is not detected on the projection screen. It becomes possible.
- FIG. 17 shows another embodiment of the liquid crystal display unit 1 according to the above specific example of the present invention.
- at least the first polarizing member 31 and the first polarizing member 31 are different from each other.
- Frames 5, 5 1 forming voids 4, 41 between them, and ventilation holes 6, 61 provided in at least a part of the frames 5, 51, and a small number of the ventilation holes 6, 6 1
- At least a part of the liquid crystal display unit 1 is provided with filters 7 and 71.
- the main purpose is to correct the color of the liquid crystal cell 2, and it is also possible to further compensate the temperature characteristics of the liquid crystal cell 2, and to form a frame body forming the void 41.
- the filter 71 must be provided in the ventilation hole 61 of 51.
- FIG. 18 discloses a further embodiment of the liquid crystal display unit 1 ending with the above specific example according to the present invention, in which a first polarizing member 31 and at least one liquid crystal cell 2 are provided.
- a liquid crystal display unit 1 comprising a second polarizing member 3 and at least two phase correcting members 20 and 21, wherein the first phase correcting member 20 comprises the first polarizing member 3.
- the second phase correction member 21 is provided between the liquid crystal cell 2 and the second polarizing member 3, respectively; and At least between the first polarizing member 31 and the first phase correction member 20, or between the first phase correction member 20 and the liquid crystal cell 2, or between the liquid crystal cell 2 and the first Between the second-order complementary member 21 or the second phase correction member 21 and the second polarizing member
- Ventilation holes 6, 61 are provided in at least a part of the frame bodies 5, 51.
- a liquid crystal display unit in which filters 7 and 71 are provided in at least a part of the ventilation holes 6 and 61 is shown.
- liquid crystal cell 2 and the two phase correction members 20 and 21 may be joined using, for example, the method shown in FIG. 19. Also possible, oh.
- the liquid crystal cell 2 is fitted into the opening and the window 15 of the liquid crystal cell support 10 and fixed, and the window 15 is covered from both sides of the liquid crystal cell support 10.
- the phase correction member 20 used in the present invention preferably has a temperature characteristic opposite to that of the liquid crystal cell 2 used. Shown in the figure.
- FIG. 20 shows the temperature characteristics of TN and STN type liquid crystal cells as typical liquid crystal cells used in the present invention, and shows the threshold voltage V th (25 ⁇ ⁇ ) at 25 ° C.
- 5 is a graph showing a ratio of the threshold voltage Vth to a change in ambient temperature according to a temperature change.
- the temperature characteristics of the TN and STN type liquid crystal cells show a negative characteristic with respect to a temperature rise
- the temperature characteristics of the phase correction member 20 have a positive temperature characteristic as shown by a dotted line HB.
- the temperature characteristics of the TN or STN type liquid crystal cell can be smoothed to the temperature characteristics shown by HC. I can do it.
- the configuration of the liquid crystal display unit configured using the phase correction member 20 according to the present invention can be used together with all the configurations of the liquid crystal display unit not using the phase correction member described above. .
- phase correction member 20 similarly to the liquid crystal cell 2, it is possible to use a liquid crystal cell having the above-described correction function. It may be composed of a film having the same.
- a liquid crystal cell type when used as the phase correction member 20, it is made of the same material as the liquid crystal cell used as the driving liquid crystal cell 2 of the liquid crystal display unit. It is preferable to use a liquid crystal cell. In such a case, the liquid crystal cell used as the phase correction member 20 does not need to be provided with an electrode like the driving liquid crystal cell 2 of the liquid crystal display unit. It is desirable that the alignment direction is opposite to the liquid crystal alignment direction of the driving liquid crystal cell 2.
- phase correction member 20 when a material composed of a film is used as the phase correction member 20, for example, NR Z440 manufactured by Nitto Denko Corporation or the like can be preferably used. It is.
- the phase correction member 20 is disposed on the light incident side, It is desirable that the liquid crystal cell 2 is disposed on the light emission side.
- a liquid crystal display unit 1 configured by using the phase correction member 20 and a liquid crystal display unit configured by a light source 201, It is also possible to use a configuration in which the phase correction member 20 is disposed on the light exit side and the liquid crystal cell is disposed on the light entrance side.
- a liquid crystal projector using the liquid crystal display unit 1 configured using the phase correction member 20 described above, and as a specific example configuration in that case, Is, for example, an illumination device 203 including an illumination optical system including at least a light source 201, a condenser lens 202, a projection optical system 300, and the liquid A liquid crystal projector comprising a liquid crystal display unit 1, more specifically, the first polarizing member 31 in the liquid crystal display unit is disposed on an incident light source side, and the liquid crystal display It is preferable that the first polarizing member 31 or the first phase correcting member 20 in the unit be disposed on the incident light source side with respect to the liquid crystal cell 2.
- a fan 400 for forming an air flow in the liquid crystal display unit 1 is the same as in the above-described specific example.
- a heat absorption filter is provided between the lighting device and the liquid crystal display unit using the liquid crystal display unit without using the phase correction member.
- a heat absorption filter may be provided between the illumination optical system and the liquid crystal display unit.
- the liquid crystal display unit 1 using only one liquid crystal cell 2 used in the liquid crystal display unit 1 or the liquid crystal projector 200 is used.
- the RGB color separation / combination method such as when performing color one-pixel display, it is necessary to configure a liquid crystal display unit or a liquid crystal projector using at least three liquid crystal cells. It is clear that there is.
- one liquid crystal display unit may be configured by using two or more liquid crystal cells and a plurality of liquid crystal cells, and may be configured to be stored according to the present invention.
- the positional relationship between the polarizing member and the liquid crystal cell is only required to be opposite on the optical axis. If the optical axis is refracted by a reflecting mirror or the like, the positional relationship between the polarizing member and the liquid crystal cell is required. Need not necessarily be parallel.
- the sealed structure prevents dust from entering the vicinity of the liquid crystal cell, the dust is not attached to the liquid crystal cell, and the dust is enlarged and projected by the projection lens, which is an optical system, so that the quality of the projected image is significantly reduced. Damage does not occur, and dust adheres to the outer surface of the polarizing member in the liquid crystal projector. Because the depth of focus of the lens is not matched, dust is not seen in the projected image, and it has features that do not impair the quality of the projected image. In addition, it has the feature that it can provide good projected images without worrying about aftercare due to dust.
- the liquid crystal cell has a sealed structure
- the enclosure does not need to be sealed as much as before, and even if the housing is opened and closed by replacing the lamp that is the lighting means, advanced technology and jigs by the manufacturer are not required. It can provide LCD projectors with features that are easy to maintain.
- liquid crystal display unit since a phase correction member is used, it is said that pixel quality such as contrast changes with temperature change, or that color changes and the appearance deteriorates. This has the effect of eliminating the problem.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Projection Apparatus (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93914939A EP0601210B1 (en) | 1992-06-30 | 1993-06-30 | Liquid crystal display unit and liquid crystal projector using this liquid crystal display unit |
| JP50091794A JP3414399B2 (ja) | 1992-06-30 | 1993-06-30 | 液晶表示ユニット及び液晶表示ユニットを用いた液晶プロジェクタ |
| US08/199,139 US5508830A (en) | 1992-06-30 | 1993-06-30 | Liquid crystal display unit having an enclosed space between the liquid crystal cell and at least one polarizer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4/51311U | 1992-06-30 | ||
| JP5131192 | 1992-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994000792A1 true WO1994000792A1 (fr) | 1994-01-06 |
Family
ID=12883377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1993/000903 Ceased WO1994000792A1 (fr) | 1992-06-30 | 1993-06-30 | Unite d'affichage a cristaux liquides et projecteur a cristaux liquides l'utilisant |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5508830A (ja) |
| EP (2) | EP0816897B1 (ja) |
| JP (1) | JP3414399B2 (ja) |
| DE (1) | DE69329836T2 (ja) |
| WO (1) | WO1994000792A1 (ja) |
Families Citing this family (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5666171A (en) * | 1994-08-02 | 1997-09-09 | Casio Computer Co., Ltd. | Liquid crystal image projector |
| JP3606649B2 (ja) * | 1995-10-13 | 2005-01-05 | ソニー株式会社 | プロジェクタ装置 |
| US6394608B1 (en) * | 1997-06-20 | 2002-05-28 | Hitachi, Ltd. | Display device and display optical system unit |
| US6108131A (en) * | 1998-05-14 | 2000-08-22 | Moxtek | Polarizer apparatus for producing a generally polarized beam of light |
| US6208463B1 (en) | 1998-05-14 | 2001-03-27 | Moxtek | Polarizer apparatus for producing a generally polarized beam of light |
| US6288840B1 (en) | 1999-06-22 | 2001-09-11 | Moxtek | Imbedded wire grid polarizer for the visible spectrum |
| US6122103A (en) * | 1999-06-22 | 2000-09-19 | Moxtech | Broadband wire grid polarizer for the visible spectrum |
| US6666556B2 (en) | 1999-07-28 | 2003-12-23 | Moxtek, Inc | Image projection system with a polarizing beam splitter |
| US7306338B2 (en) * | 1999-07-28 | 2007-12-11 | Moxtek, Inc | Image projection system with a polarizing beam splitter |
| US6234634B1 (en) | 1999-07-28 | 2001-05-22 | Moxtek | Image projection system with a polarizing beam splitter |
| US6447120B2 (en) | 1999-07-28 | 2002-09-10 | Moxtex | Image projection system with a polarizing beam splitter |
| US6243199B1 (en) | 1999-09-07 | 2001-06-05 | Moxtek | Broad band wire grid polarizing beam splitter for use in the visible wavelength region |
| USD443216S1 (en) | 2000-07-27 | 2001-06-05 | Associates Of Cape Cod, Inc. | Liquid crystal polarizer for a device for measuring fluorescence polarization |
| US6967697B2 (en) | 2000-12-15 | 2005-11-22 | Kopin Corporation | Display housing with a display alignment device |
| US7253852B2 (en) | 2001-04-25 | 2007-08-07 | Kopin Corporation | Polarizer removal in a microdisplay system |
| US7375887B2 (en) | 2001-03-27 | 2008-05-20 | Moxtek, Inc. | Method and apparatus for correcting a visible light beam using a wire-grid polarizer |
| US6909473B2 (en) * | 2002-01-07 | 2005-06-21 | Eastman Kodak Company | Display apparatus and method |
| US7061561B2 (en) * | 2002-01-07 | 2006-06-13 | Moxtek, Inc. | System for creating a patterned polarization compensator |
| US6785050B2 (en) | 2002-05-09 | 2004-08-31 | Moxtek, Inc. | Corrosion resistant wire-grid polarizer and method of fabrication |
| US7113335B2 (en) * | 2002-12-30 | 2006-09-26 | Sales Tasso R | Grid polarizer with suppressed reflectivity |
| JP2005208492A (ja) * | 2004-01-26 | 2005-08-04 | Sony Corp | 液晶表示装置及びビデオカメラ |
| US7800823B2 (en) * | 2004-12-06 | 2010-09-21 | Moxtek, Inc. | Polarization device to polarize and further control light |
| US20080055549A1 (en) * | 2006-08-31 | 2008-03-06 | Perkins Raymond T | Projection Display with an Inorganic, Dielectric Grid Polarizer |
| US20080055720A1 (en) * | 2006-08-31 | 2008-03-06 | Perkins Raymond T | Optical Data Storage System with an Inorganic, Dielectric Grid Polarizer |
| US7570424B2 (en) * | 2004-12-06 | 2009-08-04 | Moxtek, Inc. | Multilayer wire-grid polarizer |
| US7961393B2 (en) | 2004-12-06 | 2011-06-14 | Moxtek, Inc. | Selectively absorptive wire-grid polarizer |
| US20080055722A1 (en) * | 2006-08-31 | 2008-03-06 | Perkins Raymond T | Optical Polarization Beam Combiner/Splitter with an Inorganic, Dielectric Grid Polarizer |
| US7630133B2 (en) * | 2004-12-06 | 2009-12-08 | Moxtek, Inc. | Inorganic, dielectric, grid polarizer and non-zero order diffraction grating |
| US20080055721A1 (en) * | 2006-08-31 | 2008-03-06 | Perkins Raymond T | Light Recycling System with an Inorganic, Dielectric Grid Polarizer |
| TW200728830A (en) * | 2005-10-18 | 2007-08-01 | Jds Uniphase Corp | Electronically compensated LCD assembly |
| US20070195257A1 (en) * | 2006-02-21 | 2007-08-23 | Jds Uniphase Corporation | LC imager panel assembly |
| US20070297052A1 (en) * | 2006-06-26 | 2007-12-27 | Bin Wang | Cube wire-grid polarizing beam splitter |
| US20070296921A1 (en) * | 2006-06-26 | 2007-12-27 | Bin Wang | Projection display with a cube wire-grid polarizing beam splitter |
| US8755113B2 (en) | 2006-08-31 | 2014-06-17 | Moxtek, Inc. | Durable, inorganic, absorptive, ultra-violet, grid polarizer |
| US7789515B2 (en) * | 2007-05-17 | 2010-09-07 | Moxtek, Inc. | Projection device with a folded optical path and wire-grid polarizer |
| US20080316599A1 (en) * | 2007-06-22 | 2008-12-25 | Bin Wang | Reflection-Repressed Wire-Grid Polarizer |
| JP2010032938A (ja) * | 2008-07-31 | 2010-02-12 | Hitachi Displays Ltd | 液晶表示装置 |
| CN101738668B (zh) | 2008-11-19 | 2011-12-07 | 上海丽恒光微电子科技有限公司 | 偏振立方体及其制造方法 |
| US8248696B2 (en) | 2009-06-25 | 2012-08-21 | Moxtek, Inc. | Nano fractal diffuser |
| US8913321B2 (en) | 2010-09-21 | 2014-12-16 | Moxtek, Inc. | Fine pitch grid polarizer |
| US8611007B2 (en) | 2010-09-21 | 2013-12-17 | Moxtek, Inc. | Fine pitch wire grid polarizer |
| US8873144B2 (en) | 2011-05-17 | 2014-10-28 | Moxtek, Inc. | Wire grid polarizer with multiple functionality sections |
| US8913320B2 (en) | 2011-05-17 | 2014-12-16 | Moxtek, Inc. | Wire grid polarizer with bordered sections |
| US8922890B2 (en) | 2012-03-21 | 2014-12-30 | Moxtek, Inc. | Polarizer edge rib modification |
| CN102998823B (zh) * | 2012-12-06 | 2015-04-08 | 京东方科技集团股份有限公司 | 点灯检查设备的偏光片支撑部件及点灯检查设备 |
| US9354374B2 (en) | 2013-10-24 | 2016-05-31 | Moxtek, Inc. | Polarizer with wire pair over rib |
| CN115167028B (zh) * | 2021-04-06 | 2025-07-15 | 上海太阳能工程技术研究中心有限公司 | 一种抗冲击柔性液晶镜片 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6484290A (en) * | 1987-09-28 | 1989-03-29 | Seiko Epson Corp | Projection type display device |
| JPH0283525U (ja) * | 1988-12-16 | 1990-06-28 | ||
| JPH04104124A (ja) * | 1990-08-23 | 1992-04-06 | Semiconductor Energy Lab Co Ltd | 液晶電気光学装置 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3890628A (en) * | 1973-10-23 | 1975-06-17 | Motorola Inc | Liquid crystal light control device and circuit |
| US4443065A (en) * | 1980-12-09 | 1984-04-17 | Sharp Kabushiki Kaisha | Interference color compensation double layered twisted nematic display |
| JPS57174375A (en) * | 1981-04-22 | 1982-10-27 | Hitachi Ltd | Liquid crystal composition |
| JPS58211742A (ja) * | 1982-06-04 | 1983-12-09 | Alps Electric Co Ltd | 移動体用情報表示装置 |
| JPS6250812A (ja) * | 1985-08-30 | 1987-03-05 | Sharp Corp | 液晶表示素子 |
| JPH0758372B2 (ja) * | 1985-12-20 | 1995-06-21 | カシオ計算機株式会社 | 液晶表示装置 |
| US5035489A (en) * | 1986-05-19 | 1991-07-30 | Seiko Epson Corporation | Liquid crystal device having two super twisted nematic cells |
| WO1987007394A1 (fr) * | 1986-05-27 | 1987-12-03 | Bernd Haastert | Affichage a cristaux liquides passif projetable |
| JPS6346416A (ja) * | 1986-08-13 | 1988-02-27 | Sharp Corp | オ−バ−ヘッドプロジェクタ用液晶表示装置 |
| JPS63105584A (ja) * | 1986-10-22 | 1988-05-10 | Kawasaki Heavy Ind Ltd | 画像投影装置 |
| JPH01105216A (ja) * | 1987-10-19 | 1989-04-21 | Toshiba Corp | 液晶表示装置 |
| JPH0269316A (ja) * | 1988-09-02 | 1990-03-08 | Idemitsu Kosan Co Ltd | 機能性複合材料 |
| EP0375425A3 (en) * | 1988-12-22 | 1991-09-18 | Seiko Instruments Inc. | Projection pad incorporating a liquid crystal panel |
| US5157523A (en) * | 1989-03-29 | 1992-10-20 | Matsushita Electric Industrial Co., Ltd. | Projection type liquid crystal display unit including orthogonal phase plates |
| DE3914526A1 (de) * | 1989-05-02 | 1990-11-08 | Licentia Gmbh | Fluessigkristall-anzeigevorrichtung |
| JPH02304416A (ja) * | 1989-05-19 | 1990-12-18 | Hitachi Ltd | 車載用デイスプレー装置 |
| DE3925382A1 (de) * | 1989-06-14 | 1991-01-03 | Merck Patent Gmbh | Elektrooptisches system mit kompensationsfilm |
| US5107356A (en) * | 1989-12-26 | 1992-04-21 | General Electric Company | Liquid crystal display device with birefringent films |
| JPH0427929A (ja) * | 1990-05-23 | 1992-01-30 | Matsushita Electric Ind Co Ltd | 投射型画像表示装置 |
| JPH0460533A (ja) * | 1990-06-29 | 1992-02-26 | Sharp Corp | 液晶プロジェクターの冷却制御機構 |
| JPH0460534A (ja) * | 1990-06-29 | 1992-02-26 | Sharp Corp | 液晶プロジェクターのエアフローシステム |
| CA2051191C (en) * | 1990-09-13 | 1996-07-09 | Shuzo Kaneko | Optical modulation element |
| JPH04194820A (ja) * | 1990-11-22 | 1992-07-14 | Sharp Corp | 液晶表示装置 |
| JPH04294323A (ja) * | 1991-03-25 | 1992-10-19 | Hitachi Ltd | 液晶表示装置 |
| JPH05158016A (ja) * | 1991-12-10 | 1993-06-25 | Sharp Corp | 液晶表示装置 |
-
1993
- 1993-06-30 JP JP50091794A patent/JP3414399B2/ja not_active Expired - Fee Related
- 1993-06-30 EP EP97114187A patent/EP0816897B1/en not_active Expired - Lifetime
- 1993-06-30 EP EP93914939A patent/EP0601210B1/en not_active Expired - Lifetime
- 1993-06-30 WO PCT/JP1993/000903 patent/WO1994000792A1/ja not_active Ceased
- 1993-06-30 DE DE69329836T patent/DE69329836T2/de not_active Expired - Fee Related
- 1993-06-30 US US08/199,139 patent/US5508830A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6484290A (en) * | 1987-09-28 | 1989-03-29 | Seiko Epson Corp | Projection type display device |
| JPH0283525U (ja) * | 1988-12-16 | 1990-06-28 | ||
| JPH04104124A (ja) * | 1990-08-23 | 1992-04-06 | Semiconductor Energy Lab Co Ltd | 液晶電気光学装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0601210A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US5508830A (en) | 1996-04-16 |
| JP3414399B2 (ja) | 2003-06-09 |
| EP0601210A4 (en) | 1995-03-29 |
| EP0601210A1 (en) | 1994-06-15 |
| DE69329836D1 (de) | 2001-02-08 |
| EP0601210B1 (en) | 2002-03-27 |
| DE69329836T2 (de) | 2001-04-19 |
| EP0816897A1 (en) | 1998-01-07 |
| EP0816897B1 (en) | 2001-01-03 |
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