WO2000052522A1 - Procede permettant de fabriquer un afficheur a cristaux liquides - Google Patents
Procede permettant de fabriquer un afficheur a cristaux liquides Download PDFInfo
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- WO2000052522A1 WO2000052522A1 PCT/JP2000/001209 JP0001209W WO0052522A1 WO 2000052522 A1 WO2000052522 A1 WO 2000052522A1 JP 0001209 W JP0001209 W JP 0001209W WO 0052522 A1 WO0052522 A1 WO 0052522A1
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- WIPO (PCT)
- Prior art keywords
- polymer substrate
- liquid crystal
- alignment film
- vertical alignment
- crystal display
- Prior art date
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
- G02F1/133723—Polyimide, polyamide-imide
-
- 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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
-
- 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
- G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
Definitions
- the present invention relates to a method for manufacturing a liquid crystal display device using a polymer substrate, and more particularly to a method for manufacturing a liquid crystal display device easily and excellent in mass productivity using a polymer substrate.
- Fig. 7 shows the configuration of a conventional STN (Super Twisted Nematic) liquid crystal display device using a polymer substrate.
- a transparent electrode 22 made of ITO is formed on a polymer substrate 21 made of polycarbonate or the like.
- a polyamic acid or polyimide solution is printed on the polymer substrate 21 and cured to form an alignment film 23 made of polyimide.
- the substrate 21 is oriented by rubbing with a buff cloth made of cotton or rayon fiber.
- a transparent electrode 25 made of ITO and an alignment film 26 are formed on another polymer substrate 24 facing the same, and the rubbing direction of the substrate 21 is 200 to 260 °.
- the rubbing direction is set so as to form an angle.
- the two substrates are opposed to each other and integrated with a sealant 27, and a liquid crystal 28 is sealed in the gap to form an STN liquid crystal display device.
- An STN display device using such a polymer substrate can be realized as a lightweight display device that is not easily broken because the substrate is not a conventional glass but a high molecule. Furthermore, since the STN display mode is used, even if the number of electrodes for time-division driving is increased, the display quality is not degraded and a large-capacity display can be realized. It is.
- Another advantage of using a polymer substrate is the so-called roll-to-roll process, which is different from single-wafer processing as in the conventional glass substrate processing process because the polymer substrate is flexible. This is to enable continuous processing.
- the alignment film printing process, the alignment film solidification process, and the alignment process can be performed continuously using the polymer substrate 31 wound up in a roll shape, making it extremely simple. It is a manufacturing method with excellent mass productivity.
- the orientation of the alignment film in the STN display mode is a homogenous (parallel) orientation
- the orientation angle of the upper and lower substrates is 200 to 260 °
- the angle formed by the specifications of the manufactured product is constant.
- the rubbing direction for processing is not constant depending on the product, the rubbing direction of the rubbing buff cloth must be changed to a predetermined angle with respect to the substrate flow direction each time the tooling is changed, which requires a great deal of labor.
- important characteristics such as electro-optical characteristics and viewing angles are determined by the orientation direction, so it is no exaggeration to say that the orientation direction changes for each product. If the continuous line was stopped for each product, productivity would be lower than in the processing of single-wafer processing glass substrates.
- glass substrates that have been generally used for liquid crystal display devices are optically isotropic, so that even if linearly polarized light is incident in any direction, it is converted to linearly polarized light in the same direction. Emit. Therefore, the optical design of STN has been designed ignoring the substrate.
- polymer substrates have anisotropic refractive indices in the X and y directions and are not optically isotropic. That is, the linearly polarized light entering from directions other than the x and y directions becomes elliptically polarized light when exiting from the polymer substrate, which greatly degrades the optical design of the STN liquid crystal display device.
- the other method is to align the alignment direction of the liquid crystal molecules on the substrate with the fast or slow axis direction of the optical anisotropy of the polymer substrate.
- the linearly polarized light incident on the polymer substrate does not become elliptically polarized light at the time of emission but remains linearly polarized light.
- the direction of the fast or slow axis of the optical anisotropy is parallel or perpendicular to the long side due to the restrictions imposed by the manufacturing method. It must be one of them. Therefore, it cannot be set to any angle between 200 and 260 degrees as required by STN.
- an object of the present invention is to provide a simple and high-productivity production method that does not damage a polymer substrate. Disclosure of the invention
- the present invention uses a vertical alignment (VA) mode for the alignment treatment of a polymer substrate, and the polymer substrate is manufactured by continuously moving the polymer substrate in a longitudinal direction in a vertical alignment film forming step and a vertical alignment film curing step.
- VA vertical alignment
- a step of providing a vertical alignment film material on the polymer substrate, and solidifying this material to form a vertical alignment film The step of obtaining is performed by continuously moving the polymer substrate in the longitudinal direction.
- VA vertical alignment
- the step of determining the direction in which the liquid crystal molecules fall is performed by continuously moving the polymer substrate in the longitudinal direction.
- rubbing in a fixed direction is sufficient even if the characteristics of the liquid crystal are changed. Therefore, alignment processing can be performed while moving the polymer substrate in the long direction, and productivity is remarkably improved.
- Specific alignment methods include rubbing in the direction in which the polymer substrate is moved, or incorporating a functional group that changes its structure by light into the alignment film and irradiating the polymer substrate with light from a certain direction. There is a method of performing an alignment treatment by moving the wafer.
- the step of forming the vertical alignment film in the step is to provide a polymer substrate buffer that flows continuously between these steps so that the polymer substrate can flow continuously in the longitudinal direction. This makes it possible to continuously perform the patterning step in which the exposure processing cannot be performed without stopping once and the vertical alignment film forming step in which the processing can be continuously performed without stopping the flow of the polymer substrate.
- FIG. 1 is a diagram showing a cross section of the structure of a display device according to the present invention
- FIG. 2 is a diagram schematically showing a manufacturing process of the display device according to the present invention
- FIG. 5 is a diagram showing a cross section of another configuration of the display device according to the present invention.
- FIGS. 5 and 6 are diagrams schematically showing another manufacturing process of the display device according to the present invention.
- FIG. 2 is a diagram showing a cross section of the configuration of the display device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIGS. 1 to 6 show schematic diagrams of a configuration of a polymer substrate liquid crystal display device using a vertical alignment (VA) mode according to the present invention and a method of manufacturing the same.
- the vertical alignment (VA) mode is a display mode that has been known in the past, and has excellent time division characteristics and excellent display characteristics.
- FIG. 1 shows a typical configuration of a liquid crystal display device using a polymer substrate in a vertical alignment (VA) mode according to the present invention.
- the liquid crystal molecules 8 having a negative dielectric anisotropy are oriented in a direction slightly inclined from the direction perpendicular to the polymer substrate 1 in the cell, so that when a voltage is applied to the transparent electrode 2, the liquid crystal molecules are inclined in the inclined direction.
- the molecules fall in a uniform direction, causing a uniform optical change.
- such initial alignment is created by forming a vertical alignment film 3 on the substrate surface. This is done by rubbing in one direction. To put it this way,
- the flow direction of the polymer substrate that is, the fast or slow axis of the optical anisotropy is always parallel to the rubbing direction, that is, the direction of orientation of the liquid crystal molecules on the substrate surface, as in the case of STN.
- the optical anisotropy of the polymer substrate does not adversely affect the optical design. Therefore, the selection of the polymer substrate can be made with emphasis on transparency, durability, and cost, and the production can be made very easily.
- the strength of the rubbing only determines the direction of falling, there is no need to rub strongly, and there is no danger of damaging the soft polymer substrate.
- the substrate is a conventional glass substrate, only a single-wafer processing step can be performed as in the case of the STN mode, and the unique features of the vertical alignment mode, which is a simple manufacturing method, cannot be used at all. is there.
- the features of a simple manufacturing method can be utilized for the first time.
- FIG. 2 is a schematic diagram of the manufacturing method of the present invention in which the polymer substrate employs the vertical alignment mode.
- a polymer substrate that is long and continuous in the lengthwise direction is wound in a roll shape.
- the polymer substrate 31 is provided with an alignment film, a step 33 of solidifying the alignment film 33, an alignment step 34 And it will be processed continuously.
- the alignment process from alignment film formation to rubbing is continuous Processing makes it possible.
- the direction in which the liquid crystal molecules fall in the vertical alignment mode is set to two directions, which are different by 180 ° within one pixel. It is known that the viewing angle characteristics of the display are improved.
- Fig. 3 shows an example.
- an inclined film 12 having a mountain-shaped inclination is formed on a polymer substrate 10, and a vertical alignment film 13 is formed thereon.
- a voltage is applied to the transparent electrode 11
- the liquid crystal molecules 19 are inverted on both sides of the peak of the mountain, and the initial tilt that improves the viewing angle characteristics is obtained.
- the rubbing process itself is not necessary, so that not only does the continuous processing of the polymer substrate have no hindrance, but nothing touches the soft polymer substrate surface. It won't hurt at all.
- FIG. 4 shows another method for making the liquid crystal molecules fall in two or more directions in one pixel in the vertical alignment mode.
- the rubbing step itself is not required, so there is no hindrance to the continuous processing step of the polymer substrate.
- an alignment film in which the alignment direction of the polymer alignment film is not controlled by rubbing but is controlled by irradiating light in a certain direction.
- a polymer, polyimide, cinnamate, chalcone, azobenzene, or other polymer is introduced with a functional group that causes a structural change by light, and the irradiation light
- the functional group undergoes a three-dimensional structural change depending on the direction, and the arrangement of the entire polymer is made uniform. This method can also be applied to the present invention.
- the patterning step is performed separately by sequentially moving and processing, and the patterned polymer substrate is wound into a roll as shown in FIG.
- a patterning step is also provided in the roll-to-roll processing step, and a buffer for stopping the substrate during exposure in this patterning step or between the patterning step and the step of providing an alignment film during the patterning step.
- a method of providing is also provided in the roll-to-roll processing step, and a buffer for stopping the substrate during exposure in this patterning step or between the patterning step and the step of providing an alignment film during the patterning step.
- FIG. 5 shows an example in which a substrate buffer is provided in the polishing process.
- the polymer substrate supplied from the polymer substrate roll is provided with a substrate buffer in the process.
- the process moves to the patterned step 41.
- a buffer is provided to accumulate the substrate for the stop during the exposure in the process, so that the flow of the substrate does not stop at the exit.
- the polymer substrate is continuously processed in a step 42 of providing an alignment film, a step 43 of solidifying the alignment film, and an alignment step 44.
- FIG. 6 shows an example in which a buffer is provided between the patterning step and the alignment film printing step.
- the polymer substrate wound into a roll moves to a patterning step 51, and passes through an exposure step of a stopping process.
- the substrate then enters 52 buffer rolls. No, the puffer roll is initially located off the continuous path, and the substrate will move around.
- the buffer port moves in the direction of the substrate path and continuously supplies the polymer substrate to the next alignment film forming step 53. to continue. Thereafter, the process of solidifying the alignment film 54 and the alignment process 55 and the substrate are continuously processed, and a simple and high-productivity liquid crystal display device manufacturing method is provided.
- the polymer substrate used in the present invention is not limited as long as it is a transparent polymer.
- PET heat-resistant polyolefin resin
- ADC resin aryl diglycol carbonate resin
- acrylic resin norbornene resin
- maleimide resin transparent epoxy resin
- transparent polyimide resin etc.
- STN it is desirable that the optical anisotropy And in the fast axis and the slow axis is 5 nm or less, but there is no limitation in the present invention.
- the present invention will be described in more detail based on examples.
- Polymers forming the polymer substrate 1 include polyether sulfone (PES), polycarbonate (PC), polyarylate (PAR), amorphous polyolefin (APO), polyester ether 'ether' ketone (PEEK), It can be appropriately selected from polyethylene terephthalate (PET), arylglycolcarbonate resin (ADC resin), acrylic resin, norbornene resin, maleimide resin, transparent epoxy resin, and transparent polyimide resin.
- PES polyether sulfone
- PC polycarbonate
- PAR polyarylate
- APO amorphous polyolefin
- PEEK polyester ether 'ether' ketone
- PET polyethylene terephthalate
- ADC resin arylglycolcarbonate resin
- acrylic resin norbornene resin
- maleimide resin maleimide resin
- transparent epoxy resin and transparent polyimide resin.
- a PES substrate having a thickness of 0.2 mm and an optical anisotropy of the fast axis and the slow axis, that is, the optical anisotropy And in the long and short directions of the substrate of 10 nm was used.
- a transparent electrode 2 made of ITO is formed by low-temperature sputtering or the like.
- the substrate was separately subjected to patterning processing of a transparent electrode by a patterning step of sequential movement, wound up in a roll shape, and then processed by applying a continuous processing step shown in FIG. That is, in this embodiment, a polyimide-based vertical alignment agent is printed on a polymer substrate, and solidified to form a vertical alignment film. Rubbing was performed by weakly rubbing the vertical alignment film.
- a polyimide polymer vertical alignment agent is used for the alignment film 3 in FIG. 1, and the rubbing process is considerably weaker than that of a normal STN liquid crystal display device and is parallel to the long direction. Since it was rubbed in a certain direction, there was no damage due to rubbing, and there was no need to change the tooling to change the rubbing direction for any product, showing extremely high productivity.
- the polymer substrate 4 on which the transparent electrode 5 and the alignment film 6 in FIG. 1 are formed is treated in the same process, and the polymer substrate 1 and the rubbing direction are opposed to each other.
- the liquid crystal display device manufactured in this manner was light and unbreakable because the substrate was a polymer, and the display characteristics were comparable to those of the STN liquid crystal display device. According to the present embodiment, a display device of a polymer substrate comparable to the conventional one can be manufactured easily and with high productivity.
- FIG. 3 is a diagram showing another example of a display device using a polymer substrate.
- the polymers contained in the high molecular substrate 10 include polyestersulfone (PES), polycarbonate (PC), polyarylate (PAR), amorphous polyolefin (APO), polyether 'ether' ketone (PEEK), and polyethylene. It can be appropriately selected from terephthalate (PET), aryl diglycol carbonate resin (ADC resin), acrylic resin, norbornene resin, maleimide resin, transparent epoxy resin, and transparent polyimide resin.
- PET terephthalate
- ADC resin aryl diglycol carbonate resin
- acrylic resin norbornene resin
- maleimide resin maleimide resin
- transparent epoxy resin and transparent polyimide resin.
- a PC substrate having a thickness of 0.1 mm and an optical anisotropy of the fast axis and the slow axis, that is, the optical anisotropy And of the substrate in the long and short directions of 15 nm was used.
- a transparent electrode 11 made of ITO is formed by low-temperature sputtering or the like. This substrate was processed by applying the continuous processing step shown in FIG.
- an inclined film 12 having a mountain-shaped inclination in FIG. 3 was produced using a photoresist.
- An alignment film 13 made of a polyimide-based vertical alignment agent was formed thereon, and processed without performing a rubbing step, and there was no damage observed during rubbing. Even for products, there was no need to change the tooling to change the rubbing direction, indicating a very high productivity.
- the polymer substrate 14 on which the transparent electrode 15, the inclined film 16, and the alignment film 17 are formed as shown in FIG. 3 is processed in the same process, and the peaks and valleys of the polymer substrate 10 and the inclined film 16 are relatively opposed.
- a liquid crystal display device is obtained by sealing liquid crystal with negative dielectric anisotropy in the gap.
- the liquid crystal display device manufactured in this manner was light and indivisible due to the polymer substrate, and the display characteristics were comparable to those of the STN liquid crystal display device. According to the present embodiment, a display device of a polymer substrate comparable to the conventional one can be manufactured easily and with high productivity. (Example 3)
- FIG. 4 is a diagram showing a configuration of another example of a display device using a polymer substrate.
- the polymers contained in the polymer substrate 100 include polyether sulfone (PES), polycarbonate (PC), polyarylate (PAR), amorphous polyolefin (APO), polyether 'ether' ketone (PEEK), and polyethylene. It can be appropriately selected from terephthalate (PET), aryl diglycol carbonate resin (ADC resin), acrylic resin, norbornene resin, maleimide resin, transparent epoxy resin, and transparent polyimide resin.
- an amorphous polyolefin substrate having a thickness of 0.15 mm and an optical anisotropy of the fast axis and the slow axis, that is, the optical anisotropy And of the substrate in the long and short directions of 10 nm was used.
- a transparent electrode 101 made of TO is formed.
- This substrate was processed by applying the continuous processing step shown in FIG.
- the transparent electrode was formed by panning so that the slit shown in FIG.
- An alignment film 102 made of a polyimide-based vertical alignment agent was formed on this polymer substrate, and was processed without performing the rubbing process.There was no damage observed during rubbing, and , Which Even for such products, there was no need to change the tooling by changing the rubbing direction, and the product showed extremely high productivity.
- the high molecular substrate 103 on which the transparent electrode 104 and the alignment film 105 shown in FIG. 4 are formed is processed in the same process, and the polymer substrate 100 and the sealing agent 106 are attached. At the same time, a liquid crystal with negative dielectric anisotropy is sealed in the gap to form a liquid crystal display.
- the liquid crystal display device thus manufactured was light and indivisible due to the polymer substrate, and the display characteristics were comparable to those of the STN liquid crystal display device. According to the present embodiment, a display device of a polymer substrate comparable to the conventional one can be manufactured easily and with high productivity. (Example 4)
- the polymer substrate 1 in Fig. 1 was obtained by setting the optical anisotropy of the fast axis and the slow axis of 0.15 mm thick, that is, the optical anisotropy An in the long and short directions of the substrate to 20 nm.
- the continuous processing step shown in FIG. 2 is performed. In this case, light is irradiated in a direction slightly inclined from the vertical direction in the alignment step 34 in FIG. That is, there is no need for rubbing.
- Example 4 When the alignment film 3 in Example 4 was made of a chalcone-based polymer, and a display device of a polymer substrate was manufactured in the same manner as in Example 4, the same effect as in Example 4 was obtained.
- the method for manufacturing a display device according to the present invention provides a liquid crystal display device using a polymer substrate with high productivity while maintaining a display quality comparable to the conventional one. Compared to conventional liquid crystal display devices using glass substrates, they can be provided at low cost by adopting a production method that does not break, is thin, light, and has high productivity. . Industrial applicability
- the method for manufacturing a liquid crystal display device according to the present invention is useful in the case where a polymer substrate is used for continuous manufacturing with a roll t0 roll, and a manufacturing method with high productivity becomes possible. It is suitable for manufacturing low cost polymer substrate liquid crystal display devices.
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/914,484 US7327426B1 (en) | 1999-03-02 | 2000-03-01 | Method of manufacturing liquid crystal display |
JP2000602678A JP3730124B2 (ja) | 1999-03-02 | 2000-03-01 | 液晶表示装置の製造方法 |
EP00906610A EP1168052B1 (en) | 1999-03-02 | 2000-03-01 | Method of manufacturing liquid crystal display |
DE60034776T DE60034776T2 (de) | 1999-03-02 | 2000-03-01 | Verfahren zur herstellung von flüssigkristallanzeigen |
HK02108369.4A HK1046735B (zh) | 1999-03-02 | 2002-11-19 | 液晶顯示單元的製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5460299 | 1999-03-02 | ||
JP11/54602 | 1999-03-02 |
Publications (1)
Publication Number | Publication Date |
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WO2000052522A1 true WO2000052522A1 (fr) | 2000-09-08 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/001209 WO2000052522A1 (fr) | 1999-03-02 | 2000-03-01 | Procede permettant de fabriquer un afficheur a cristaux liquides |
Country Status (9)
Country | Link |
---|---|
US (1) | US7327426B1 (ja) |
EP (1) | EP1168052B1 (ja) |
JP (1) | JP3730124B2 (ja) |
KR (1) | KR100643719B1 (ja) |
CN (1) | CN1162740C (ja) |
DE (1) | DE60034776T2 (ja) |
HK (1) | HK1046735B (ja) |
TW (1) | TWI240129B (ja) |
WO (1) | WO2000052522A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008081678A1 (ja) * | 2006-12-28 | 2008-07-10 | Citizen Holdings Co., Ltd. | 液晶パネル |
WO2011152590A1 (en) * | 2010-06-01 | 2011-12-08 | Snu R&Db Foundation | Liquid crystal display device, method for manufacturing the same and method for manufacturing substrate for alignment of liquid crystal |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20020023173A (ko) * | 2001-12-05 | 2002-03-28 | 서대식 | 복합폴리이미드를 이용한 Advanced VA-π셀 액정표시장치 |
KR101146381B1 (ko) * | 2005-07-29 | 2012-05-17 | 엘지디스플레이 주식회사 | 액정 표시 장치의 러빙 장치 및 러빙 방법 |
CN103969890B (zh) * | 2013-09-04 | 2016-08-24 | 上海天马微电子有限公司 | 一种tft阵列基板及显示面板、显示装置 |
CN109727530A (zh) * | 2017-10-31 | 2019-05-07 | 昆山工研院新型平板显示技术中心有限公司 | 柔性显示模组及柔性显示模组制备方法 |
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JPS5838926A (ja) * | 1981-09-01 | 1983-03-07 | Canon Inc | 液晶表示装置における透明樹脂基板の製造方法 |
JPS632019A (ja) * | 1986-06-23 | 1988-01-07 | Matsushita Electric Ind Co Ltd | 液晶表示体用複合フイルタの製造法 |
EP0788012A2 (en) * | 1996-02-05 | 1997-08-06 | Stanley Electric Co., Ltd. | Homeotropic orientation liquid crystal display and its manufacture |
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JPS62270918A (ja) * | 1986-05-20 | 1987-11-25 | Stanley Electric Co Ltd | 液晶表示素子の傾斜配向処理方法 |
JPS6432229A (en) * | 1987-07-28 | 1989-02-02 | Ricoh Kk | Liquid crystal display element having plastic substrate |
JPH06110059A (ja) * | 1992-09-25 | 1994-04-22 | Casio Comput Co Ltd | 配向処理方法およびその処理装置 |
US5718839A (en) * | 1994-08-26 | 1998-02-17 | Fujitsu Limited | Liquid crystalline material operable with low voltages and liquid crystal display panel using the same and liquid crystal display apparatus and manufacturing method of the apparatus |
JP3698749B2 (ja) * | 1995-01-11 | 2005-09-21 | 株式会社半導体エネルギー研究所 | 液晶セルの作製方法およびその作製装置、液晶セルの生産システム |
US5757456A (en) | 1995-03-10 | 1998-05-26 | Semiconductor Energy Laboratory Co., Ltd. | Display device and method of fabricating involving peeling circuits from one substrate and mounting on other |
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2000
- 2000-03-01 EP EP00906610A patent/EP1168052B1/en not_active Expired - Lifetime
- 2000-03-01 CN CNB008071187A patent/CN1162740C/zh not_active Expired - Fee Related
- 2000-03-01 US US09/914,484 patent/US7327426B1/en not_active Expired - Lifetime
- 2000-03-01 WO PCT/JP2000/001209 patent/WO2000052522A1/ja active IP Right Grant
- 2000-03-01 JP JP2000602678A patent/JP3730124B2/ja not_active Expired - Fee Related
- 2000-03-01 KR KR1020017011028A patent/KR100643719B1/ko active IP Right Grant
- 2000-03-01 DE DE60034776T patent/DE60034776T2/de not_active Expired - Lifetime
- 2000-03-01 TW TW089103622A patent/TWI240129B/zh not_active IP Right Cessation
-
2002
- 2002-11-19 HK HK02108369.4A patent/HK1046735B/zh not_active IP Right Cessation
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JPS5838926A (ja) * | 1981-09-01 | 1983-03-07 | Canon Inc | 液晶表示装置における透明樹脂基板の製造方法 |
JPS632019A (ja) * | 1986-06-23 | 1988-01-07 | Matsushita Electric Ind Co Ltd | 液晶表示体用複合フイルタの製造法 |
EP0788012A2 (en) * | 1996-02-05 | 1997-08-06 | Stanley Electric Co., Ltd. | Homeotropic orientation liquid crystal display and its manufacture |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008081678A1 (ja) * | 2006-12-28 | 2008-07-10 | Citizen Holdings Co., Ltd. | 液晶パネル |
US8274637B2 (en) | 2006-12-28 | 2012-09-25 | Citizen Holdings Co., Ltd. | Liquid crystal panel having an opening in transparent conductive layer for venting gas |
JP5147729B2 (ja) * | 2006-12-28 | 2013-02-20 | シチズンホールディングス株式会社 | 液晶パネル |
WO2011152590A1 (en) * | 2010-06-01 | 2011-12-08 | Snu R&Db Foundation | Liquid crystal display device, method for manufacturing the same and method for manufacturing substrate for alignment of liquid crystal |
Also Published As
Publication number | Publication date |
---|---|
JP3730124B2 (ja) | 2005-12-21 |
EP1168052A1 (en) | 2002-01-02 |
EP1168052B1 (en) | 2007-05-09 |
DE60034776D1 (de) | 2007-06-21 |
DE60034776T2 (de) | 2007-10-11 |
HK1046735A1 (en) | 2003-01-24 |
CN1351720A (zh) | 2002-05-29 |
KR20020015027A (ko) | 2002-02-27 |
US7327426B1 (en) | 2008-02-05 |
CN1162740C (zh) | 2004-08-18 |
TWI240129B (en) | 2005-09-21 |
KR100643719B1 (ko) | 2006-11-10 |
HK1046735B (zh) | 2005-05-06 |
EP1168052A4 (en) | 2005-04-06 |
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