WO2005050304A1 - 液晶表示素子および投射型表示装置 - Google Patents
液晶表示素子および投射型表示装置 Download PDFInfo
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- WO2005050304A1 WO2005050304A1 PCT/JP2004/016995 JP2004016995W WO2005050304A1 WO 2005050304 A1 WO2005050304 A1 WO 2005050304A1 JP 2004016995 W JP2004016995 W JP 2004016995W WO 2005050304 A1 WO2005050304 A1 WO 2005050304A1
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- liquid crystal
- crystal display
- display element
- alignment film
- sealing material
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Classifications
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- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
-
- 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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
Definitions
- Liquid crystal display device and projection type display device Liquid crystal display device and projection type display device
- the present invention relates to a liquid crystal display element in which a liquid crystal layer is sandwiched between a pair of substrates bonded with a sealing material so that alignment films face each other at a predetermined gap, and a projection type display device using this liquid crystal display element It is about
- a projection type display device such as a liquid crystal projector
- light emitted from a light source is separated into red, green and blue, and each color light is formed by three light valves configured by liquid crystal display elements (hereinafter referred to as LCD).
- LCD liquid crystal display elements
- an LCD of an active matrix drive system driven by a thin film transistor (hereinafter referred to as TFT) is generally used.
- Nematic liquid crystal is used for most of the active matrix drive type LCDs, and the main display method is an optical rotation mode LCD.
- the nematic liquid crystal used in the liquid crystal in the rotatory polarization mode is a twisted nematic (TN) liquid crystal with a 90-degree twisted molecular alignment, and in principle it has a high contrast ratio and good gradation display performance in black and white display. Show.
- TN twisted nematic
- the alignment film of each substrate is disposed opposite to each other on the substrate on which the two electrodes having the alignment film are formed, and in the seal area located around the pixel display area where the image is actually displayed. , It is pasted together by seal material.
- a spherical spacer called a micropearl is used before bonding as described above, or a columnar spacer formed by a resist is used.
- An empty cell is manufactured by passing through these processes. Thereafter, the liquid crystal is sealed in the empty cell to manufacture a liquid crystal cell.
- the above-mentioned liquid crystal is composed of several kinds of single liquid crystal materials, and is also called a liquid crystal composition.
- a polarizing plate is attached to the manufactured liquid crystal cell to manufacture a liquid crystal display element.
- the image quality abnormality is easily noticeable due to the enlarged projection.
- the amount of light incident on the panel is much larger than that of the direct-view type, the temperature of the panel becomes high, and deterioration due to a slight amount of water ingress is easily visible.
- Patent Document 1 Patent Document 1
- Patent Document 2 Patent Document 2
- a filler is added for the purpose of adjusting the viscosity of the seal with an average particle diameter of about 2 m.
- conductive beads of 6. O / zm or 6.5 ⁇ m are mixed as a transfer material, and the average particle diameter is obtained in order to obtain conduction between counter electrodes through the conductive beads.
- the conductive filler of 0. 1-0. 5 m is added.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-15005
- Patent Document 2 Japanese Patent Application Laid-Open No. 11-95232
- an active matrix drive type LCD used as a light valve of a projection type display device is miniaturized along with the miniaturization of the projection type display device such as a liquid crystal projector.
- the development of brightness is progressing.
- the pixel pitch of the liquid crystal display device is getting smaller as the definition is increased.
- the number of pixels is 1024 x 768, and the pixel pitch is 18 m.
- the distance between transparent electrodes for example, ITO: indium oxide
- a filler having an average particle diameter of about 2 m is used, or conductive beads having a diameter of 6.0 m or 6.5 m are mixed, and the average is
- a conductive filler having a particle diameter of 0.1-0.5 / zm is used, gap defects occur in a narrow gap liquid crystal panel which tends to narrow the cell gap such as in a projector, and reliability defects occur. Has the disadvantage of frequent occurrences.
- An object of the present invention is to provide a projection type display device using the liquid crystal display element.
- an alignment film for aligning liquid crystals in a predetermined direction is formed on two substrates, and the alignment film has a predetermined gap. It is a liquid crystal display element in which a liquid crystal layer is sandwiched between a pair of substrates pasted together by a sealing material so as to face each other, wherein the sealing material contains a filler having an average particle diameter of less than 0.5 m.
- the liquid crystal material used for the liquid crystal layer has a refractive index anisotropy of 0.16 or more at room temperature and a cell gap of 3 ⁇ m or less.
- the content of the filler contained in the seal material is in the range of 15 to 40 wt%.
- the maximum particle size of the filler contained in the seal material is 1.5 It is less than ⁇ m.
- the specific surface area of the filler contained in the sealing material is 30 m 2 / g or less.
- the alignment film material is an inorganic alignment film.
- a light source, a condensing optical system for guiding light emitted from the light source to a liquid crystal display element, and light projected by light modulation by the liquid crystal display element are enlarged and projected.
- a projection optical system, and in the liquid crystal display element, an alignment film for aligning the liquid crystal in a predetermined direction is formed on the two substrates, and the alignment film is opposed at a predetermined gap.
- a liquid crystal layer is sandwiched between a pair of substrates bonded by a sealing material, the sealing material contains a filler having an average particle diameter of less than 0.5 m, and the liquid crystal material used for the liquid crystal layer has a refraction at room temperature.
- Cell anisotropy is less than 0.16 and cell gap is less than 3 m.
- the present invention it is effective to make the diameter of the filler smaller for the purpose of, for example, the reliability such as the penetration of water. According to experiments, it is not necessary to use fillers with an average particle size of less than 0. 0, preferably 0. 3 ⁇ m or less, and there are many reliability failures caused by water infiltration, and no effect is seen at all. .
- the content of the filler is less than 15 wt%, the effect of the reliability failure caused by water infiltration can not be seen at all, and if it is more than 40 wt%, the viscosity increases and the workability is poor. I hesitate.
- the maximum particle diameter of the filler contained in the sealing material is 1.5 m or less
- a narrow gap liquid crystal such as a projector with a cell gap of 3 ⁇ m or less
- the specific surface area is too large, which is the surface area per unit weight, the proportion of the fine particles becomes large, and the viscosity of the sealing agent rapidly increases.
- the shape of each of these fillers is preferably spherical. The reason is that the specific surface area of the sphere is the smallest and the increase in viscosity when mixed with the sealing agent is small.
- the present invention is very effective particularly for a liquid crystal display element employing an alignment film formed by spin coating.
- the liquid crystal material used for the liquid crystal layer is characterized by having a refractive index anisotropy of 0.16 or more at room temperature and a cell gap of 3 ⁇ m or less.
- the present invention is particularly effective for a projection type liquid crystal display device.
- the present invention it is possible to realize a high quality image by improving the moisture resistance, and an advantage of being able to realize a high refractive index anisotropic liquid crystal with high definition and a high contrast by narrow cell gap. .
- the seal width can be reduced, and a high aperture ratio can be realized by downsizing the panel or expanding the effective pixel area.
- the projection type LCD such as a projector, etc.
- high brightness can be realized by the high irradiation amount of the lamp being possible, and workability can be improved, and high productivity and high yield can be realized by cell gap abnormality prevention.
- the narrow cell gap has the advantage of improving the response speed and favoring the motion picture characteristics.
- FIG. 1 is a cross-sectional view showing a schematic configuration of an active matrix liquid crystal display device according to the present invention.
- FIG. 2 is a diagram showing the relationship between cell gap and contrast.
- FIGS. 3A and 3B are diagrams for explaining the relationship between the cell gap d and the refractive index anisotropy ⁇ .
- FIG. 4 is a view showing the relationship between retardation (And) and transmittance.
- FIG. 5 is a schematic diagram of a pixel portion of the active matrix liquid crystal display device according to the present embodiment.
- FIG. 5 is a schematic diagram of a pixel portion of the active matrix liquid crystal display device according to the present embodiment.
- FIG. 6 is an example of a cross-sectional view of the active matrix liquid crystal display element of the present embodiment.
- FIGS. 7A to 7F are diagrams for explaining the process (the manufacturing process of the liquid crystal panel) of the cell manufactured in the present embodiment.
- FIG. 8 is a schematic configuration view showing an example of a projection type display device which is an electronic apparatus using a liquid crystal display element according to the present embodiment.
- FIG. 9 is a schematic configuration view showing another example of a projection type display device which is an electronic device using a liquid crystal display element according to the present embodiment.
- FIG. 1 is a cross-sectional view showing a schematic configuration of an active matrix liquid crystal display device according to the present invention.
- the liquid crystal display element 10 has two oppositely disposed substrates, that is, a TFT array substrate 11 and a transparent opposite disposed opposite to the TFT array substrate 11. And a substrate 12.
- the TFT array substrate 11 is also, for example, a quartz substrate, and the counter substrate 12 is made of, for example, a glass substrate or a quartz substrate.
- a pixel electrode 13 is provided on the TFT array substrate 11, and is made of, for example, a transparent conductive thin film such as an ITO film (indium 'tin' oxide film).
- An ITO film 14 is formed on the entire surface of the opposing substrate 12 opposite to the TFT array substrate 11.
- An alignment film (not shown) for aligning liquid crystals in a predetermined direction is formed on the TFT array substrate 11 and the counter substrate 12 as described later, and the sealing material 15 is used so that the alignment films face each other at a predetermined gap.
- the liquid crystal layer 16 is sandwiched between a pair of bonded substrates (enclosed Has been
- the sealing material 15 contains a nonconductive filler (filler) having an average particle diameter of less than 0.5 ⁇ m!
- the liquid crystal material used for the liquid crystal layer 16 has a refractive index anisotropy ⁇ ⁇ force of 0.16 or more at room temperature, for example, 0.16, 0.17, 0
- the cell gap d is set to 3 ⁇ m or less, which is set to 18, 18 etc., and which is the distance between the TFT array substrate 11 and the counter substrate 12 (in fact, the distance between the alignment film and the alignment film).
- the liquid crystal display element 10 having such a configuration is used, for example, as a light valve of a projection type display device.
- the liquid crystal display device 10 used as a light valve for a liquid crystal projector or the like is miniaturized along with the miniaturization of the projection type display device, and the pixel pitch is 20 m or less, for example, 18 ⁇ m for XGA type. I'm going forward.
- FIG. 2 is a diagram showing the relationship between cell gap and contrast.
- the abscissa represents the cell gap d
- the ordinate represents the relative contrast ratio.
- the measurement was performed using a three-plate projector with black and white display, in a dark room, at one point in the center of the panel.
- the cell gap d is preferably 3 m or less.
- FIG. 3A and FIG. 3B are diagrams for explaining the relationship between the cell gap d and the refractive index anisotropy ⁇ 0031.
- PL indicates a polarizing plate
- DL indicates an analyzing plate
- GL1 and GL2 indicate glass substrates
- LCM indicates liquid crystal molecules.
- the normally white (NW) mode in which the polarizing plate PL and the analyzing plate DL are orthogonally arranged and lighted when not lit
- the following Gooch-Tarry equation determines ⁇ nd to obtain high transmittance.
- the transmissivity at voltage off depends on the wavelength of light and retardation ( ⁇ nd), and the above-mentioned Gooch-Tarry equation holds.
- FIG. 4 is a diagram showing the relationship between retardation (And) and transmittance.
- the horizontal axis represents retardation (And), and the vertical axis represents transmittance.
- the curve indicated by A is the characteristic of blue light with a wavelength of 450 nm
- the curve indicated by B is the characteristic of green light with a wavelength of 550
- the curve indicated by C is red (with a wavelength of 650 nm Red) shows the characteristics of colored light.
- the maximum value of the retardation (And) of the transmittance of green light is usually the first maximum value in relation to the force response speed at which two of 0.48 111 and 1.07 m exist. We adopt 0.48 ⁇ m.
- the liquid crystal has a high ⁇ ⁇ ⁇ .
- the liquid crystal generally tends to deteriorate in moisture resistance and heat resistance as the refractive index anisotropy ⁇ increases, and the selection width as a liquid crystal material tends to decrease.
- Table 1 shows the relationship between ⁇ and display abnormality in environmental testing.
- Table 1 shows the results of accelerated driving test of the conventional liquid crystal display device under an environment of 60 ° C. and 90% using an environmental tester.
- the cell gap d which is the distance between the TFT array substrate 11 and the counter substrate 12, is set to 3 m or less, and the liquid crystal layer
- the refractive index anisotropy ⁇ ⁇ at room temperature of the liquid crystal material used in 16 is set to 0.16 or more, and further, the sealing material 15 contains a nonconductive filler having an average particle diameter of less than 0.5 ⁇ m.
- the liquid crystal display element 10 according to this embodiment to which a nonconductive filler having an average particle diameter of less than 0.5 / xm is added as described above is 60 ° using an environmental tester. Table 2 shows the results of accelerated drive tests conducted under a C, 90% environment.
- the liquid crystal display device 10 according to the present embodiment does not have the possibility of occurrence of display abnormality due to the change with time, even when used under actual severe conditions.
- the selection range of the liquid crystal material is expanded, and as a result, a high ⁇ material margin can be achieved.
- Non-Patent Document 1 Monthly Display '02 January Issue High Refractive Index Anisotropic Liquid Crystal Sumitomo Chemical Sekine et al.
- the average particle diameter of the sealing material 15 is less than 0.5 ⁇ m.
- Non-conductive filler is added.
- the liquid crystal display element 10 according to the present embodiment sufficiently corresponds to this. It can correspond. Furthermore, response speed can be improved.
- the filler added to the sealing material 15 has a small particle size with good uniformity, such as large dispersion such as silica, and in this embodiment, the average particle diameter is 0.5 ⁇ m in this embodiment. It is less than.
- the content of the filler (filler) contained in the sealing material 15 is in the range of 15 to 40 wt%.
- the maximum particle diameter of the filler contained in the sealing material 15 is 1.5 ⁇ m or less.
- the specific surface area of the filler (filler) contained in the sealing material 15 is 30 m 2 / g or less.
- an alignment film for aligning liquid crystals in a predetermined direction is formed on the TFT array substrate 11 and the counter substrate 12, in the present embodiment, at least one of the TFT array substrate 11 and the counter substrate 12 is used. An alignment film is formed under the sealing material of the substrate.
- the average particle size of the filler (filler) is, for example, a measurement by a scanning electron microscope (SEM) or a measurement, and a cumulative weight average particle size by a laser scattered light method does not matter. .
- the specific surface area is measured by the BET method.
- the diameter of the filler (filler) for the purpose of reliability such as water infiltration is more effective, as it is thinner. According to experiments, unless the average particle size of the filler is less than 0. 0, preferably 0. 0 or less, reliability failure caused by water infiltration may occur frequently and the effect may not be observed at all. I understand.
- the content of the filler is set in the range of 15-40 wt%, the filler (filler) If the content of is less than 15 wt%, no effect is observed on the reliability failure caused by water infiltration, and if it is more than 40 wt%, the viscosity is increased to deteriorate the workability.
- the maximum particle diameter of the filler (filler) contained in the sealing material 15 is 1.5 ⁇ m or less, using a filler in which large particle diameters are mixed, the cell gap of 3 ⁇ m or less like a projector In a narrow gap liquid crystal panel, a gap failure occurs.
- the basis of the filler having a specific surface area of 30 m 2 / g or less contained in the sealing material 15 is as follows.
- the specific surface area is the surface area per unit weight, but if it is too large, the proportion of fine particles will increase and the viscosity of the sealing material will rise sharply. According to the experiment, it was possible to obtain a sealing material at 30 m 2 / g or less, with no problem in the workability.
- each of these fillers is preferably spherical. The reason is that the specific surface area of the sphere is the smallest and the increase in viscosity when mixed with the sealing agent is small.
- the reason why the alignment film is formed under the seal material of at least one of the TFT array substrate 11 and the counter substrate 12 is as follows.
- the present embodiment is very effective particularly for a liquid crystal display device employing an alignment film formed by spin coating.
- the alignment film material is an inorganic alignment film.
- the inorganic alignment film is typically exemplified by silicon dioxide or the like formed by vapor deposition, but vaporizable acids such as CaF 2 and MgF 2 can also be used.
- Other examples include materials having a siloxy acid skeleton formed by printing, spin coating, or an inkjet method.
- FIG. 5 is a schematic view of a pixel portion of the active matrix liquid crystal display device according to the present embodiment
- FIG. 6 is an example of a cross sectional view of the active matrix liquid crystal display device of the present embodiment.
- the liquid crystal display element 10 includes the TFT array substrate 11 and the transparent opposing substrate 12 disposed opposite to the TFT array substrate.
- the TFT array substrate 11 is, for example, a quartz substrate
- the counter substrate 12 is, for example, a glass substrate or a quartz substrate.
- the TFT array substrate 11 is provided with a pixel electrode 13 and is made of, for example, a transparent conductive thin film such as an ITO film (indium 'thin' oxide film).
- the counter substrate 12 is provided with the entire surface ITO film (counter electrode) 14 described above on the entire surface.
- a light shielding film 17 is further provided in a region other than the opening region of each pixel portion.
- alignment films 20 and 21 for aligning the liquid crystal 16 in a predetermined direction are formed at the time of manufacturing the liquid crystal panel on the pixel electrode 13 and the protective film 19 as well as on the counter electrode 14 opposed thereto.
- a plurality of pixel switching TFTs 22 for switching control of the respective pixel electrodes 13 are provided at adjacent positions on the plurality of pixel electrodes 13 formed in a matrix shape forming the image display area of the liquid crystal display element 10!
- the signal line 23 to which the pixel signal is supplied is electrically connected to the source 24 of the TFT 22 described above.
- the pixel signal to be written is supplied to the signal line 23.
- the scanning line 25 is electrically connected to the gate of the TFT 22, and it is configured to apply a scanning signal in a pulse manner to the scanning line 25 at a predetermined timing.
- the pixel electrode 13 is electrically connected to the drain 26 of the TFT 22, and the pixel signal supplied from the signal line 23 is specified by causing the switch 22 to be conductive for a certain period of time as the switching element TFT 22. Write at the timing of.
- the pixel signal of a predetermined level written to the liquid crystal through the pixel electrode 13 is held for a certain period with the counter electrode (ITO film) 14 formed on the counter substrate 12.
- the liquid crystal layer 16 has a change in the orientation or order of the molecular assembly depending on the voltage level applied. Modulate the light to enable gradation display. In the case of normally white display, incident light is allowed to pass through the liquid crystal portion according to the applied voltage, and light having a contrast corresponding to the liquid crystal display element power pixel signal is emitted as a whole.
- a storage capacitor 27 is added in parallel with the liquid crystal capacitor formed between the pixel electrode 13 and the counter electrode 14. As a result, the retention characteristics are further improved, and a liquid crystal display device having a high contrast ratio can be realized. Also, in order to form such a storage capacitor 27, a resistively coupled Cs line 28 is provided.
- Reference numeral 29 denotes an interlayer insulating film, and 30 denotes a semiconductor layer.
- a transparent resist layer to be a columnar spacer (not shown) was formed on the counter substrate 12 described above.
- Example 1 the process of bonding the TFT array substrate 11 and the counter substrate 12 having the above-described configuration with the sealing material 15 and the device characteristics will be described as specific Example 1 Example 5.
- the TFT array substrate 11 and the counter substrate 12 were washed with a neutral detergent or pure water and then dried at 120 ° C. for 20 minutes.
- a quartz substrate was used as the substrate material.
- substrate was aligned.
- an orientation film made of polyimide was applied to a thickness of about 50 nm by spin coating, it was dried at 100 ° C. for 1 minute (temporary baking).
- polyimide for example, soluble polyimide (manufactured by Japan Synthetic Rubber Co., Ltd.) was used (Spinner 1 at 2000 rpm for 30 seconds).
- the spin coating method was used to form the alignment film, but the printing method is acceptable, and the ink jet method is not effective.
- the kind of alignment film material is polyimide
- Rubbing was performed using a rayon cloth under conditions of a rubbing angle of 90 ° and two rubbing times.
- sealing material used in this example those obtained by adding a silica filler (hereinafter referred to as a filler) to a sealing material containing an epoxy resin as a main component and those not containing it were used.
- a silica filler hereinafter referred to as a filler
- fused silica, crystalline silica, alumina, silicon nitride and the like are preferably mixed with different kinds of fillers, and even when it is used.
- the following spherical silica was used.
- the average particle size was measured by sampling 100 pieces of particles by SEM, the specific surface area was measured by BET method, the content was measured by electronic balance, and the maximum particle size was confirmed particles of maximum particle size by 30,000 magnification.
- the viscosity of these sealants was about 200,000 mPa ⁇ s when measured at room temperature with a cone-plate viscometer.
- the adjusted sealing material is formed on the periphery of the counter substrate by a dispenser with a pattern excluding the injection port, and as shown in FIG. 7E, the TFT array substrate 1 and the counter substrate are formed.
- the cell gap was set to 3.
- the seal width was about 0.7 mm.
- liquid crystal material a material in which a small amount of a single substance was newly added at a high level of the refractive index anisotropy ⁇ was used.
- the liquid crystal display element of this example was subjected to an acceleration drive test under an environment of 60 ° C. and 90% using an environmental tester. The results are shown in Table 3.
- liquid crystal display device of the present embodiment it is possible to obtain a more reliable high quality liquid crystal display device.
- a sealing material containing an epoxy resin as a main component and a silica filler (hereinafter referred to as a filler) added thereto was used.
- Filler One has an average particle size of 0.3 / ⁇ , specific surface area of 20 m 2 / g, content of 10 wt%, 15 wt%, 20 wt%, 30 wt%, 40 wt%, 45 wt%, six conditions, maximum particle size Spherical silica with a diameter of 1. or less was used.
- the average particle size was measured by sampling 100 pieces of particles by SEM, the specific surface area was measured by BET method, the content was measured by electronic balance, and the maximum particle size was confirmed particles of maximum particle size by 30,000 magnification.
- the adjusted sealing material was formed on the periphery of the counter substrate by a dispenser with a pattern excluding the injection port, and the TFT array substrate 1 and the counter substrate 2 were superimposed to form a cell gap of 3. 3.m.
- the seal width was about 0.7 mm.
- the liquid crystal display element of this example was observed.
- the content is 45 wt%, the workability is poor and the seal breakage occurs due to the increase in viscosity.
- liquid crystal display element of the present example was subjected to an acceleration drive test under an environment of 60 ° C. and 90% using an environmental tester.
- liquid crystal display element of this embodiment it is possible to obtain a more reliable high quality liquid crystal display element.
- a silica filler (hereinafter referred to as a filler) to a sealing material containing an epoxy resin as a main component was used.
- Filler One has an average particle size of 0.3 m, a specific surface area of 20 m 2 / g each, a content of 20 wt%, and a maximum particle size of 0.5 m, 1.0 / ⁇ 1., 1.5 / ⁇ ⁇
- a spherical silica of 2.0 / ⁇ and 3.0 m or less was used.
- the average particle size was measured by sampling 100 pieces of particles by SEM, the specific surface area was measured by BET method, the content was measured by electronic balance, and the maximum particle size was confirmed particles of maximum particle size by 30,000 magnification.
- the adjusted sealing material was formed on the periphery of the counter substrate by a dispenser with a pattern excluding the injection port, and the TFT array substrate 1 and the counter substrate 2 were superimposed to form a cell gap of 3. 3.m.
- the seal width was about 0.7 mm.
- Cell gap abnormality was observed in the case of using a filler having a maximum particle size of 2.0 ⁇ m or less and 3. O / z m or less. In the liquid crystal display devices having a maximum particle size of 0. or less, 1. O / z m or less, and 1.5 m or less, no cell gap abnormality was observed.
- liquid crystal display element of this embodiment it is possible to obtain a more reliable high quality liquid crystal display element.
- a sealing material containing an epoxy resin as a main component and a silica filler (hereinafter referred to as a filler) added thereto was used.
- FILLER one average particle diameter of 0. 3 / ⁇ ⁇ , the specific surface area of 40m 2 / g, 30m 2 / g, 3 conditions 20m 2 / g, 20wt% content, the maximum particle diameter 1. 0 m
- the following spherical silica was used.
- the average particle size was measured by sampling 100 pieces of particles by SEM, the specific surface area was measured by BET method, the content was measured by electronic balance, and the maximum particle size was confirmed particles of maximum particle size by 30,000 magnification.
- the adjusted sealing material was formed on the periphery of the opposite substrate by a dispenser except for the injection port, and the workability was evaluated.
- liquid crystal display element of this embodiment it is possible to obtain a more reliable high quality liquid crystal display element.
- a seal pattern was formed in the same manner as in Example 1, and then the inlet was removed.
- the sealing material used in this example those obtained by adding a silica filler (hereinafter referred to as filler) to a sealing material containing an epoxy resin as a main component, and those not using it were used.
- the filler used was spherical silica having an average particle size of 0.3 m, a specific surface area of 20 m 2 / g, a content of 20 wt%, and a maximum particle size of 1. O / z m or less.
- the average particle size was measured by sampling 100 pieces of particles by SEM, the specific surface area was measured by BET method, the content was measured by electronic balance, and the maximum particle size was confirmed particles of maximum particle size by 30,000 magnification.
- the adjusted sealing material is formed on the periphery of the counter substrate in a pattern excluding the injection port by a dispenser, and the TFT array substrate 1 and the counter substrate 2 are superposed, and the cell gap is 2.65 m, 2.4 m And The seal width was about 0.7 mm.
- the acceleration drive test was conducted on the liquid crystal display element of the present example at an environment of 60 ° C. and 90% using an environmental tester. The results are shown in Tables 1 and 2 described above.
- liquid crystal display element of this embodiment it is possible to obtain a more reliable high quality liquid crystal display element.
- a projection-type display device will be described with reference to the schematic configuration diagram of FIG. 8 as an example of an electronic apparatus using a liquid crystal display element having the above-described features.
- a light source 301 for example, a light source 301, a transmission type liquid crystal display element 302, and a projection optical system 303 are sequentially arranged and arranged on an optical axis C. ing.
- the light emitted from the lamp 304 constituting the light source 301 has its component emitted backward by the reflector 305 collected forward and made incident on the condenser lens 306.
- the condenser lens 306 further concentrates the light and guides it to the liquid crystal display element 302 via the incident side polarizing plate 307.
- the guided light is converted into an image by the air polarizing plate 308 and the liquid crystal display element 302 having a shutter or light valve function and the emission.
- the displayed image is enlarged and projected onto the screen 310 via the projection optical system 303.
- a filter 314 is inserted between the light source 301 and the condenser lens 306 to remove light of unnecessary wavelength contained in the light source, such as infrared light and ultraviolet light.
- the projection type display device 500 shown in FIG. 9 is a schematic configuration diagram of an optical system of a projection type liquid crystal device in which three liquid crystal display elements described above are prepared and used as liquid crystal display elements 562R, 562G and 562B for RGB. Indicates
- a light source device 520 and a uniform illumination optical system 523 are used as an optical system.
- a color separation optical system 524 which is a color separation means for separating the luminous flux W emitted from the uniform illumination optical system 523 into red (R), green (G) and blue (B), and luminous flux R, G, B
- a projection lens unit 506 which is projection means for enlarging and projecting onto the surface.
- a light guide system 527 for guiding the blue luminous flux B to the corresponding light valve 525 B is provided.
- the uniform illumination optical system 523 includes two lens plates 521 and 522 and a reflection mirror 531.
- the two lens plates 521 and 522 are disposed so as to be orthogonal to each other with the reflection mirror 531 interposed therebetween.
- the two lens plates 521 and 522 of the uniform illumination optical system 523 are arranged in a matrix, respectively. Equipped with multiple rectangular lenses.
- the light beam emitted from the light source device 520 is divided into a plurality of partial light beams by the rectangular lens of the first lens plate 521.
- these partial luminous fluxes overlap near the three light nosses 525R, 525G, 525B by the rectangular lenses of the second lens plate 522. Therefore, by using the uniform illumination optical system 523, the three light valves 525R, 525G, and 525B can be uniformed even when the light source device 520 has an uneven illuminance distribution in the cross section of the emitted light flux. It becomes possible to illuminate with various illumination lights.
- Each color separation optical system 524 comprises a blue-green reflective dichroic mirror 541, a green reflective dichroic mirror 542, and a reflective mirror 543.
- the blue light flux B and the green light flux G contained in the light flux W are reflected at a right angle, and are directed to the green reflection dichroic mirror 542 side.
- the red luminous flux R passes through the blue-green reflecting dichroic mirror 541, is reflected at a right angle by the rear reflecting mirror 543, and is emitted from the emitting portion 544 of the red luminous flux R toward the prism unit 510.
- the green reflecting dichroic mirror 542 only the green light beam G is reflected at a right angle among the blue light beam B and the green light beam G reflected by the blue-green reflecting dichroic mirror 541, and the green light beam G is reflected.
- the light is emitted from the light emission unit 545 to the side of the color combining optical system.
- the blue light beam B that has passed through the green reflection dichroic mirror 542 is emitted from the emission portion 546 of the blue light beam B to the light guide system 527 side.
- the distances from the emitting part of the luminous flux W of the uniform illumination optical system 523 to the emitting parts 544, 545, 546 of the respective color luminous fluxes in the color separation optical system 524 are set to be substantially equal.
- a condensing lens 551 and a condensing lens 552 are disposed on the emission side of the emission portion 544 of the red light beam R and the emission portion 545 of the green light beam G of the color separation optical system 524, respectively. Therefore, the red luminous flux R and the green luminous flux G which also emitted the respective emission part forces are made incident on the condensing lens 551 and the condensing lens 552 to be collimated.
- the red light flux R and the green light flux G thus paralleled are incident on the light valve 525R and the light valve 525G, respectively, are modulated, and image information corresponding to each color light is attached.
- these liquid crystal display elements are switching-controlled in accordance with image information by drive means (not shown), whereby modulation of each color light passing therethrough is performed.
- the blue luminous flux B is guided to the corresponding light valve 525 B via the light guide system 527, where it is similarly modulated according to the image information.
- the light valves 525R, 525G, and 525B in this example further include incident side polarization means 561R, 561G, and 561B, and liquid crystal display elements 562R, 562G, and 5B disposed between them.
- the light guiding system 527 is provided between the blue light flux B and the condenser lens 554 disposed on the exit side of the exit section 546, the entrance side reflection mirror 571 and the exit side reflection mirror 572 and these reflection mirrors.
- An intermediate lens 573 disposed and a condenser lens 553 disposed on the front side of the light valve 525 B are also configured.
- the blue luminous flux emitted from the condenser lens 546 is guided to the liquid crystal display element 562 B via the light guide system 527 and modulated.
- the optical path lengths of the luminous fluxes of the respective color luminous fluxes that is, the light emitting portion force of the luminous flux W, the distances to the respective liquid crystal display elements 562R, 562G and 562B are the longest for the blue luminous flux B.
- the light quantity loss can be suppressed by interposing the light guide system 527.
- the color light fluxes R, G, G modulated through the light valves 525R, 525G, 525B are incident on the color synthesis prism 510 and are synthesized here.
- the light combined through the color combining prism 510 is enlarged and projected onto the surface of the projection surface 600 at a predetermined position through the projection lens unit 506.
- the present invention is applicable to liquid crystal display devices of any type such as TFTF active matrix type, TFT active matrix type, nossic matrix drive type, optical rotation mode, birefringence mode, etc.
- the effects described above can be expected.
- the built-in drive type liquid crystal device but also a liquid crystal display element of an external drive circuit type, a liquid crystal display element of various sizes of about 1 inch to 15 inches diagonal or more, a projection type liquid crystal display Even when the liquid crystal injection device of the present invention is applied to a device or the like, the effect can be expected.
- the present invention is directed to a reflection type liquid crystal display element which is lined only with a projection type liquid crystal display element, LCOS
- LCOS projection type liquid crystal display element
- liquid crystal display element has a built-in drive type liquid crystal display element, a liquid crystal display element with a drive circuit attached externally, a simple matrix system, a TFD active matrix system, a passive matrix drive system, an optical rotation mode, a birefringence mode, etc. Even when applied to a liquid crystal display element, the above-mentioned effects can be expected.
- the liquid crystal panel used for a light valve such as a projector is operated in a high temperature and high humidity environment, the liquid crystal panel can be prevented from deterioration and the like. It can be applied to devices, LCOS, organic EL, and all types of devices.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04818895A EP1686414B1 (en) | 2003-11-21 | 2004-11-16 | Liquid crystal display element and projection display |
US10/579,202 US7453544B2 (en) | 2003-11-21 | 2004-11-16 | Liquid crystal display device and projection type display apparatus |
Applications Claiming Priority (2)
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JP2003392940A JP2005156752A (ja) | 2003-11-21 | 2003-11-21 | 液晶表示素子および投射型表示装置 |
JP2003-392940 | 2003-11-21 |
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WO2005050304A1 true WO2005050304A1 (ja) | 2005-06-02 |
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PCT/JP2004/016995 WO2005050304A1 (ja) | 2003-11-21 | 2004-11-16 | 液晶表示素子および投射型表示装置 |
Country Status (7)
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US (1) | US7453544B2 (ja) |
EP (1) | EP1686414B1 (ja) |
JP (1) | JP2005156752A (ja) |
KR (1) | KR20060097124A (ja) |
CN (1) | CN100416382C (ja) |
TW (1) | TWI282469B (ja) |
WO (1) | WO2005050304A1 (ja) |
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JP4944396B2 (ja) * | 2005-06-21 | 2012-05-30 | 積水化学工業株式会社 | 液晶滴下工法用硬化性樹脂組成物、液晶滴下工法用シール剤、上下導通材料及び液晶表示素子 |
TWI392905B (zh) * | 2006-08-30 | 2013-04-11 | Sony Corp | 液晶顯示元件以及投射型液晶顯示裝置 |
JP2009069422A (ja) * | 2007-09-12 | 2009-04-02 | Sony Corp | 液晶表示素子および投射型液晶表示装置 |
JP5618464B2 (ja) | 2008-05-22 | 2014-11-05 | 株式会社ジャパンディスプレイ | 液晶表示装置およびその製造方法 |
JP5736656B2 (ja) | 2010-03-24 | 2015-06-17 | セイコーエプソン株式会社 | 液晶装置および電子機器 |
JP5457321B2 (ja) | 2010-09-28 | 2014-04-02 | 株式会社ジャパンディスプレイ | 液晶表示装置 |
US20130120722A1 (en) * | 2011-11-14 | 2013-05-16 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Method and system for forming alignment film region through uv light exposure |
JP2013117744A (ja) * | 2013-03-18 | 2013-06-13 | Sony Corp | 液晶表示素子および投射型液晶表示装置 |
JP5731023B2 (ja) * | 2014-01-09 | 2015-06-10 | 株式会社ジャパンディスプレイ | 液晶表示装置 |
CN106200136B (zh) * | 2016-08-29 | 2019-08-20 | 京东方科技集团股份有限公司 | 一种封框胶及、显示面板 |
JP7106410B2 (ja) * | 2018-09-24 | 2022-07-26 | シチズンファインデバイス株式会社 | 強誘電性液晶セルの製造方法 |
CN111081604A (zh) * | 2019-12-02 | 2020-04-28 | 深圳市华星光电半导体显示技术有限公司 | 微发光二极管转移装置及微发光二极管转移方法 |
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- 2004-11-16 US US10/579,202 patent/US7453544B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
EP1686414B1 (en) | 2013-01-02 |
US7453544B2 (en) | 2008-11-18 |
KR20060097124A (ko) | 2006-09-13 |
EP1686414A1 (en) | 2006-08-02 |
TWI282469B (en) | 2007-06-11 |
EP1686414A4 (en) | 2008-04-23 |
TW200527060A (en) | 2005-08-16 |
US20070121050A1 (en) | 2007-05-31 |
CN100416382C (zh) | 2008-09-03 |
JP2005156752A (ja) | 2005-06-16 |
CN1882870A (zh) | 2006-12-20 |
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