WO2004029700A1 - パターン化位相差板、パターン化位相差板の製造方法、2d/3d切替型液晶表示パネル、および2d/3d切替型液晶表示装置 - Google Patents
パターン化位相差板、パターン化位相差板の製造方法、2d/3d切替型液晶表示パネル、および2d/3d切替型液晶表示装置 Download PDFInfo
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- WO2004029700A1 WO2004029700A1 PCT/JP2003/006712 JP0306712W WO2004029700A1 WO 2004029700 A1 WO2004029700 A1 WO 2004029700A1 JP 0306712 W JP0306712 W JP 0306712W WO 2004029700 A1 WO2004029700 A1 WO 2004029700A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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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
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
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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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
Definitions
- Patterned retarder manufacturing method of patterned retarder, 2D 3D switchable liquid crystal display panel, and 2D / 3D switchable liquid crystal display
- the present invention enables a patterned retardation plate provided with an alignment mark used for a 2 ⁇ / 3D switching type liquid crystal display panel and the like, a method of manufacturing the same, and switching between 2D display and 3D display.
- the present invention relates to a 2D / 3D switching type liquid crystal display panel and a liquid crystal display device.
- two separate substrates for sandwiching a liquid crystal layer are separately formed, and then these substrates are bonded to each other.
- alignment marks are formed on both substrates, and alignment using these alignment marks is performed.
- the alignment mark is provided by a dedicated film for forming an alignment mark below the alignment film, and is formed by a process of forming the dedicated film over the entire surface of the substrate and then patterning the formed dedicated film. Have been. For this reason, the number of steps related to the formation of the alignment mark has been increased.
- ITO Indium Tin Oxide
- the resist layer which becomes a mask when the film is patterned by development a part which becomes an alignment mark other than the above mask part is formed at the same time. Then, after forming the wiring pattern by development, only the mask portion of the resist layer is removed, and the alignment mark is left as it is, which is used for alignment in the subsequent steps.
- the resist used for the above-mentioned alignment mark is inherently low in solvent resistance. If the alignment mark is formed at a position directly in contact with the liquid crystal, the resist is deformed by dissolving in the liquid crystal solution, resulting in high precision. There is a problem that positioning cannot be performed.
- the human eyes are spatially separated and located on the head, so they perceive images viewed from two different viewpoints.
- the stereoscopic effect is recognized by the parallax of the two images.
- a liquid crystal display device has been developed that provides parallax by allowing images viewed from different viewpoints to the left and right eyes of the observer to provide 3D (stereoscopic three-dimensional) display. I have.
- an image for the left eye and an image for the right eye on the display screen are, for example, colored, polarized, Some are encoded by the display time, and are separated by a spectacle-like filter system worn by the observer so that only the image corresponding to each eye is supplied.
- the display panel 101 of the liquid crystal display device is combined with a parallax barrier 101 in which a light transmitting area and a light blocking area are formed in a stripe shape, and a visual aid such as a filter system is used on the observer side.
- liquid crystal display device that can recognize 3D images (automatic stereoscopic display) without having to do so.
- a specific viewing angle is given to the right-eye image and the left-eye image generated on the display panel 101 by the parallax panel 102 (see FIG. 9 (a)), and the image is displayed in space. From the specific observation area, only the image corresponding to each eye is visually recognized, and the observer recognizes the 3D image (see FIG. 9 (b)).
- a device that performs automatic stereoscopic display by providing a parallax barrier in a liquid crystal display device is disclosed in, for example, US Pat. No. 6,055,013 (Date of Patent: Apr. 25, 2000). I have. Incidentally, US Pat. No. 6,055,013 (Date of Patent: Apr. 25, 2000) discloses a configuration using a No. 0 turny dangling phase difference plate as a parallax nori. Also, in the liquid crystal display device having the parallax panel as described above, a means for switching the effect of the parallax barrier on / off is provided by a switching liquid crystal layer or the like, so that 3D display and 2D display (flat display) are provided.
- a device capable of electrically switching between the above is disclosed, for example, in US Pat. No. 6,046,849 (Date of Patent: Apr. 4, 2000).
- 3D display is performed when the parallax barrier effect is made effective by ONZOF of the switching liquid crystal layer, Performs 2D display when the effect of the parallax barrier is disabled.
- the configuration of the conventional 2DZ3D switching type liquid crystal display device has the following problems. That is, in the 2D / 3D switching type liquid crystal display device, in 3D display, light emitted from a light source emits a switching liquid crystal layer, a parallax barrier, and a display liquid crystal layer (a display screen is generated). 3D display is achieved by passing through the three active areas of the liquid crystal layer), which is realized by a transmissive liquid crystal display device.
- the switching liquid crystal layer only invalidates the parallax barrier, and the light emitted from the light source emits light from the switching liquid crystal layer, the parallax barrier, and the display liquid crystal layer. Passing through one active area is the same as in 3D display.
- the light emitted from the light source passes through the switching liquid crystal layer and the parallax panel both in 3D display and 2D display.
- the efficiency of light utilization is reduced.
- a light source having a higher light intensity is required as a light source to be used, as compared with a liquid crystal display device performing only 2D display or 3D display.
- the temperature of the liquid crystal layer, which is closer to the light source, of the display liquid crystal layer and the switching liquid crystal layer is particularly likely to rise, and may be higher than the ambient environmental temperature. . For this reason, even at the environmental temperature where the operation of each of the display liquid crystal layer and the switching liquid crystal layer is guaranteed, normal operation cannot be performed by the liquid crystal layer arranged on the side close to the light source, and the display may be adversely affected. . Disclosure of the invention
- An object of the present invention is to provide a method for manufacturing a patterned retardation plate that can form an alignment mark even at a position in contact with a liquid crystal layer without increasing the number of steps.
- a patterned retardation plate of the present invention comprises: an alignment film in which a first alignment region and a second alignment region having different alignment directions are formed on a substrate material; In addition to having a liquid crystal layer formed at the same time, it has an alignment mark for bonding with another member, and the above alignment mark has a different optical action between the formation area and the surrounding area. It is formed as a region.
- the alignment mark has a different optical action between the formation area and the surrounding area. Specifically, the alignment direction of the alignment film is different between the alignment mark forming region and the surrounding region.
- the polarized light passes through the liquid crystal layer of the patterned retardation plate. Later, the formation region and the surrounding region have different polarization states (the polarization axes are different by 90 °). Then, the light transmitted through the vicinity of the alignment mark of the patterned retardation plate is polarized so that the direction of its transmission axis is parallel to the polarization axis of the light transmitted through the area around the alignment mark. Detect via. At this time, only the light applied to the alignment mark formation region is blocked by the polarizing plate, so that the alignment mark can be detected.
- the alignment mark in the patterned retardation plate is detected by using the optical properties of the alignment film and the liquid crystal layer, there is no layer itself for forming the alignment mark. . Therefore, as in the case where the alignment mark is formed in the resist, the alignment mark is formed.
- the alignment mark does not dissolve in the liquid crystal solution, and the alignment mark can be formed on the patterned retardation plate without increasing the number of steps.
- an alignment film having any one of the first alignment region and the second alignment region is provided in an alignment mark formation region, and It is preferable that an alignment film having the other alignment direction is provided in a region around the alignment mark.
- the alignment marks can be formed simultaneously with the formation of the first alignment region and the second alignment region.
- an alignment film having a first alignment region and a second alignment region having different alignment directions formed on a substrate material, and a liquid crystal layer formed on the alignment film And a method for manufacturing a patterned retardation plate having an alignment mark for bonding with another member, wherein the first alignment region is formed on the entire surface of the alignment film formed on the substrate material.
- the first rubbing step, the mask forming step, the second rubbing step A plurality of regions, each having a different alignment direction, are formed in the alignment film by the etching step and the mask removing step. That is, after the first rubbing step (giving the orientation direction of the first alignment region), a predetermined region is masked by a mask forming step, and the second rubbing step (giving the orientation direction of the second alignment region) from above the mask.
- the alignment direction of the second alignment region is set in the region where the mask is not formed, and the alignment direction of the first alignment region is maintained in the region where the mask is formed.
- the alignment mark forming region or the region around the alignment mark is masked.
- the alignment direction in the alignment film can be different between the alignment mark forming region and the surrounding region, and the liquid crystal layer is formed thereon by the liquid crystal layer forming step, thereby forming the alignment mark.
- an object of the present invention is to provide a 2D / 3D switching type liquid crystal display capable of reliably performing a display operation at an environmental temperature where operation is guaranteed. It is to provide a device.
- the 2D / 3D switching type liquid crystal display panel of the present invention can display both 2D display and 3D display, and displays a display image according to input image data.
- a switching liquid crystal panel for switching 3D display and is disposed on a side closer to the light source in the display liquid crystal panel and the switching liquid crystal panel.
- the transition point of the liquid crystal layer of the liquid crystal panel is set higher than the transition point of the liquid crystal layer of the other liquid crystal panel.
- a 2D / 3D switching liquid crystal display device of the present invention includes a 2DZ3D switching liquid crystal display panel having the above configuration.
- the liquid crystal panel disposed closer to the light source is affected by heat received from the light source and the temperature of the liquid crystal panel rises above the ambient temperature, the liquid crystal panel is disposed closer to the light source.
- the transition point of the liquid crystal layer in the liquid crystal panel is set higher than the transition point of the liquid crystal layer in the liquid crystal panel located far from the light source, so that the transition point in the liquid crystal panel located far from the light source is high.
- the operation of the 2 ⁇ / 3D switchable liquid crystal display device can be guaranteed up to the surrounding ambient temperature.
- FIG. 1A is a cross-sectional view of the patterned retardation plate after the first rubbing process.
- FIG. 1 (b) is a cross-sectional view of the patterned retardation plate after the resist layer has been formed.
- FIG. 1C is a cross-sectional view of the patterned retardation plate after the first exposure, development, and drying are completed.
- Figure 1 (d) shows the patterned retarder after the second rubbing process.
- FIG. 1E is a cross-sectional view of the patterned retardation plate after the second exposure, development, and drying are completed.
- FIG. 1 (f) is a cross-sectional view of the patterned retardation plate after the liquid crystal layer has been formed.
- FIG. 2 is a cross-sectional view showing a schematic configuration of a 2D Z 3D switching type liquid crystal display panel using the patterned retardation plate.
- FIG. 3A is a cross-sectional view of the patterned retardation plate.
- FIG. 3B is a plan view of the patterned retardation plate.
- FIG. 3C is a plan view of the patterned retarder provided with the alignment mark.
- FIG. 4 is a diagram showing the direction of the optical axis of each component in the 2D / 3D switchable liquid crystal display panel.
- FIG. 5 is a chart showing a process of assembling the 2D Z 3D switching type liquid crystal display panel.
- FIG. 6 is a flowchart showing a manufacturing process of the patterned retardation plate.
- FIG. 7 is a perspective view schematically showing an alignment mark detection device in the patterned retardation plate.
- FIG. 8 is a diagram showing a method for detecting an alignment mark in the patterned retardation plate.
- FIG. 9 (a) shows the principle of 3D display, and is a view showing the effect of providing a viewing angle by the viewing field.
- Fig. 9 (b) shows the principle of 3D display, and observes the 3D display screen.
- the 2D / 3D switchable liquid crystal display panel has a configuration in which a display liquid crystal panel 10, a patterned retarder 20, and a switching liquid crystal panel 30 are bonded together. .
- the display liquid crystal panel 10 is provided as a TFT liquid crystal display panel, and includes a first polarizer 11, a counter substrate 12, a liquid crystal layer 13, an active matrix substrate 14, and a second polarizer 11.
- the active matrix substrate 14 receives image data corresponding to an image to be displayed via wiring 51 such as FPC (Flexible Printed Circuits).
- the display liquid crystal panel 10 is provided to provide the 2D / 3D switching type liquid crystal display panel with a function of generating a display screen according to image data.
- the display liquid crystal panel 10 is provided as a display image generating means for generating a display screen according to image data with respect to the 2D / 3D switching type liquid crystal display panel.
- the display method (TN method or STN method) and the drive method (active matrix drive ⁇ passive matrix drive) are not particularly limited.
- the patterned retarder 20 functions as a part of a parallax barrier, and as shown in FIG. 3A, forms an alignment film 22 on a transparent substrate 21 and further forms an alignment film 22 thereon. And a liquid crystal layer 23 laminated thereon.
- a first region 20A having a different polarization state is used in the active area of the patterned retardation plate 20, as shown in FIG. 3 (b).
- Second regions 20 B are alternately formed in a stripe shape.
- an alignment mark 20C formed in a manufacturing process described later is provided.
- the switching liquid crystal panel 30 is formed by laminating a driving substrate 31, a liquid crystal layer 32, a counter substrate 33, and a third polarizing plate 34, and the liquid crystal layer 32 is turned on on the driving substrate 31. Sometimes, a wiring 52 for applying a drive voltage is connected.
- the switching liquid crystal panel 30 is arranged as switching means for switching the polarization state of light transmitted through the switching liquid crystal panel 30 according to ON / OFF of the liquid crystal layer 32. That is, the switching liquid crystal panel 30 makes an optical modulation effect on light transmitted through the switching liquid crystal panel 30 different between 2D display and 3D display.
- the switching liquid crystal panel 30 does not need to be driven by a matrix like the display liquid crystal panel 10, and the driving electrodes provided on the driving substrate 31 and the opposing substrate 33 use the switching liquid crystal panel 3. 0 if it is formed over the entire active area.
- the direction of the optical axis of each component is illustrated in FIG.
- the optical axis shown in FIG. 4 is determined by the direction of the slow axis in the alignment film (that is, the rubbing direction with respect to the alignment film) in the liquid crystal panel and the retardation plate, and the direction of the transmission axis in the polarizing plate.
- the incident light emitted from the light source is first polarized by the third polarizing plate 34 of the switching liquid crystal panel 30.
- switching liquid crystal panel 30 functions as a half-wave plate in an OFF state during 3D display.
- the light that has passed through the switching liquid crystal panel 30 is then incident on the patterned retardation plate 20. Since the rubbing direction, that is, the direction of the slow axis is different between the first region 20 A and the second region 20 B of the patterned retardation plate 20, the first region 20 A passes through the first region 20 A. The polarized state of the light that has passed through and the light that has passed through the second region 20B are different. In the example of FIG. 4, the polarization axis of the light passing through the first region 2OA and the polarization axis of the light passing through the second region 20B are 90. Is different. Further, the patterned retardation plate 20 is set to act as a half-wave plate by the birefringence anisotropy and the film thickness of the liquid crystal layer 23.
- the light that has passed through the patterned retardation plate 20 is incident on the second polarizing plate 15 of the display liquid crystal panel 10.
- the polarization axis of light that has passed through the first region 20 A of the patterned retarder 20 is parallel to the transmission axis of the second polarizer 15, and the first region 20 A Pass through the polarizer 15 You.
- the polarization axis of the light that has passed through the second region 20B forms an angle of 90 ° with the transmission axis of the second polarizer 15, and the light that has passed through the second region 20B is polarized. It does not pass through the light plate 15.
- the parallax barrier is formed by the optical action related to the patterned retarder 20 and the second polarizer (the polarizer for parallax panel) 15.
- the function of (parallax barrier means) is achieved, and the first region 20A in the patterned retardation plate 20 is a transmission region, and the second region 20B is a blocking region.
- the light that has passed through the second polarizer 15 undergoes different optical modulation between the pixel performing black display and the pixel performing white display in the liquid crystal layer 13 of the display liquid crystal panel 10, and is subjected to white modulation depending on the pixel performing white display.
- Image display is performed by transmitting only the light that has been optically modulated through the first polarizing plate 11.
- the switching liquid crystal panel 30 When 2D display is performed, the switching liquid crystal panel 30 is turned on, and no optical modulation is applied to light passing through the switching liquid crystal panel 30. The light that has passed through the switching liquid crystal panel 30 then passes through the patterned retardation plate 20, and has passed through the first region 20A and the second region 20B. However, unlike the case of 3D display, there is no optical modulation effect on the switching liquid crystal panel 30 in the case of 2D display, so that the patterned retarder 20 The polarization axis of the transmitted light is relative to the transmission axis of the second polarizer 15. As a result, a symmetrical angle shift occurs.
- both the light that has passed through the first region 20 A and the light that has passed through the second region 20 B of the patterned retarder 20 pass through the second polarizer 15 with the same transmittance.
- the function of the parallax barrier due to the optical action associated with the patterned retarder 20 and the second polarizer 15 is not achieved (a specific viewing angle is not given), and a 2D display is obtained. .
- the 2D / 3D switching type liquid crystal display panel has a display liquid crystal panel 10, a patterned retardation plate 20, and a switching liquid crystal panel 30 each manufactured separately. It is completed by combining.
- the patterned retardation plate 20 is attached to the display liquid crystal panel 10 with an adhesive (S 1). .
- the switching liquid crystal panel 30 is bonded to the display liquid crystal panel 10 with the patterned retardation plate 20 with an adhesive to complete the 2DZ3D switching type liquid crystal display panel (S2 to S2). 3).
- Alignment marks formed on each of the display liquid crystal panel 10, the patterned retardation plate 20, and the switching liquid crystal panel 30 are used for alignment in these bonding steps. For this reason, each of the manufacturing steps of the display liquid crystal panel 10, the patterned retarder 20, and the switching liquid crystal panel 30 includes a step for forming an alignment mark.
- the present invention is particularly applicable to the manufacturing process of the patterned retardation plate 20.
- a manufacturing process of the patterned retardation plate 20 will be described with reference to FIG. 6 and FIG.
- the elemental glass to be the substrate (substrate material) 21 is cleaned, and one side of the cleaned substrate is polyimide. Is applied and baked to form an alignment film 22 (S11 to S13).
- a first rubbing process (first rubbing) is performed on the alignment film 22 (S14). The rubbing direction in the first rubbing is the rubbing direction of the second region 20B.
- FIG. 1 (a) shows a state in which the processing of S11 to S14 is completed.
- FIG. 1 (b) shows a state in which the processing of S15 to S16 is completed.
- the resist layer 51 is patterned by exposure, development, and drying steps (S17 to S18).
- the patterned resist layer 51 forms a mask portion 51a for masking a portion to be the second region 20B of the patterned retardation plate 20. Further, since the first region 2OA and the alignment mark 2OC of the patterned retardation plate 20 are not covered with the mask, the alignment film 22 is exposed.
- FIG. 1C shows a state in which the processing of S17 to S18 is completed.
- a second rubbing process (second rubbing) is performed on the substrate after the resist layer 51 has been putt ceremonies from the resist layer 51 side (S19).
- the rubbing direction in the second rubbing is the rubbing direction of the first region 20A.
- the region of the second region 20B where the alignment film 22 was covered with the mask portion 5la the region was formed by the first rubbing.
- the direction of the slow axis is maintained, the first region 20 A and the alignment mark 20 C, which are exposed without being covered by the mask portion 51 a, follow the rubbing direction of the second rubbing.
- FIG. 1 (d) shows a state in which the processing of S19 is completed.
- FIG. 1 (e) shows a state in which the processing of S20 to S22 is completed.
- FIG. 1 (f) shows a state in which the process of S24 is completed.
- the processes of S11 to S24 are performed so that a plurality of patterned retardation plates 20 are collectively formed on one large substrate. Therefore, the substrate on which the plurality of patterned retarders 20 are formed is divided into individual patterned retarders 20 and inspected, thereby completing the patterned retarder 20 (S 25 ⁇ S27).
- the resist is formed after the first rubbing treatment.
- a second rubbing is applied from above the mask.
- the formation area of the alignment mark 20C is not masked.
- the alignment direction in the region of the alignment mark 20 C is the same as that of the first region 2 OA.
- the orientation around the alignment mark 20C is the same as the orientation of the second region 20B.
- the alignment mark 20C cannot be detected by an ordinary method.
- the alignment mark can be detected by combining it with a polarizing plate in the alignment mark detection device.
- the alignment mark detection device is used as a positioning mechanism in a device for bonding a patterned retardation plate 20 and another member (for example, a display liquid crystal panel 10).
- the emitted light from the light source is irradiated on the alignment mark 20 C of the patterned retardation plate 20 via the light source side polarizing plate 61,
- the light transmitted through the patterned retardation plate 20 is detected by the light receiving unit after passing through the light receiving unit side polarizing plate 62.
- the alignment marks of other members to be aligned with the patterned retardation plate 20 are also arranged between the light source and the light receiving unit, and these alignment marks overlap. By detecting the state, the patterned retardation plate 20 and another member are aligned.
- the light having passed through the light source side polarizing plate 61 is incident on the patterned retardation plate 20 as polarized light parallel to the transmission axis direction.
- a The direction of the slow axis is shifted by 45 ° between the area of the alignment mark 20C and the area around the alignment mark 2OC. For this reason, the polarization axes of the light passing through the region of the alignment mark 20C and the light passing through the region around the alignment mark 2OC are shifted by 90 °.
- the direction of the transmission axis is set so as to be parallel to the polarization axis of the light transmitted through the area around the alignment mark 20C. Accordingly, in the light received by the light receiving section, only the light irradiated on the area of the alignment mark 20C is blocked, and the alignment mark 20C can be detected.
- the alignment mark 20 C is detected using the optical properties of the alignment film 22 and the liquid crystal layer 23. Therefore, there is no layer itself for forming an alignment mark. Therefore, unlike the case where an alignment mark is formed by a resist, a problem that the alignment mark is dissolved in the liquid crystal solution does not occur. can do.
- the alignment mark detection device it is necessary to use two polarizing plates to detect the alignment mark 20C of the patterned retardation plate 20, but the alignment by providing these polarizing plates is required. There is almost no increase in the cost of the mark detection device.
- the alignment direction of the alignment mark is the same as the second alignment region (the first region 20A in the example of FIG. 3) formed by the second rubbing, but is formed by the first rubbing.
- the orientation may be the same as that of the first orientation region (the second region 20 B in the example of FIG. 3). in this case, At the time of the first rubbing, the alignment 1 and the mark may be masked, and the rubbing may be performed with the periphery of the alignment mark exposed.
- the present invention has been described as a method of forming an alignment mark in a patterned retardation plate.
- the patterned retarder is obtained by forming a plurality of patterned retarders in a lump on a large substrate, and cutting and cutting out each patterned retarder from the large substrate.
- This division requires a marker (a mark for division), and the present invention can be applied to the formation of the marker.
- a 2DZ3D switching type liquid crystal display device is provided by mounting a drive circuit, a backlight (light source), and the like on the 2DZ3D switching type liquid crystal display panel according to the present embodiment.
- the light emitted from the light source emits light from the display liquid crystal panel 10, the patterned retarder 2 0, the light passes through the three active areas of the switching liquid crystal panel 30, and the light use efficiency is reduced due to blocking or absorption in each active area.
- the brightness of the display screen is obtained by using a light source having a high light intensity for the low light use efficiency.
- a light source having a high light intensity As described above, in the above 2D / 3D switching type liquid crystal display device, it is necessary to use a light source having a high light intensity. Therefore, as the light source, a light emitting diode (LED) is used instead of a light emitting diode (CCFT). d Cathode Fluorescent Tube) is preferably used. However, such a light source having a high light intensity generates a large amount of heat, and a 2DZ 3D switching type liquid crystal display device is close to the light source. The temperature of the components arranged well rises.
- the display liquid crystal panel 10 and the switching liquid crystal panel 30 must both be T 1 or more.
- the display liquid crystal panel 10 and the switching liquid crystal panel 3 Even when both the transition points T ni 1 and ⁇ ⁇ i 2 are set to ⁇ 1 or more, the liquid crystal panel on the side close to the light source is particularly affected by the influence of heat from the light source.
- the operating temperature is higher than the ambient environment in panel 30). Therefore, even at an ambient temperature of ⁇ 1 or less, the temperature of the switching liquid crystal panel 30 exceeds the transition point, and the 2DZ 3D switchable liquid crystal display device itself cannot perform normal display operation. There may be cases.
- the liquid crystal panel arranged closer to the light source is used. Is set so that the transition point is higher than the transition point of the other liquid crystal panel.
- T ni 1 and T ni 2 T ni 1 ⁇ T ni 2
- T ni 1 ⁇ T ni 2 T ni 1 ⁇ T ni 2
- the transition points of the liquid crystal layers of the display liquid crystal panel 10 and the switching liquid crystal panel 30 are set.
- the difference between Tni1 and Tni2 is desirably 10 ° C or more.
- the liquid crystal layer in the liquid crystal panel arranged closer to the light source is set higher than the transition point of the liquid crystal layer in the liquid crystal panel arranged farther from the light source, the liquid crystal layer moves closer to the light source.
- the operation of the 2D / 3D switching type liquid crystal display device can be guaranteed up to the ambient temperature around the transition point of the liquid crystal panel to be arranged.
- the switching liquid crystal panel 30 is a liquid crystal panel closer to the light source, but in the 2D / 3D switching type liquid crystal display panel of the present invention, the display liquid crystal panel 10 is It is also possible to adopt a configuration arranged on the side close to the light source.
- the display liquid crystal panel 10, the switching liquid crystal panel 30, and the patterned retarder 20 are arranged in this order from the side near the light source, and the transition point T ni of the liquid crystal layer in the display liquid crystal panel 10 is arranged.
- the relationship between 1 and the transition point T ni 2 of the liquid crystal layer in the switching liquid crystal panel 30 is T ni 1> T ni 2.
- an alignment mark can be formed even in a portion in contact with a liquid crystal layer without increasing the number of steps. This makes it suitable for a patterned retardation plate having an alignment mark used for a 2DZ 3D switching type liquid crystal display panel and the like and a method for manufacturing the same. It can be used appropriately.
- the display operation can be reliably performed at the environmental temperature where the operation is guaranteed.
- the present invention can be suitably used for a 2D / 3D switching type liquid crystal display panel and a liquid crystal display device capable of switching between 2D display and 3D display.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/529,233 US7557871B2 (en) | 2002-09-26 | 2003-05-28 | Patterning phase difference plate, production method for patterning phase difference plate, 2D/3D switching type liquid crystal display panel, and 2D/3D switching type liquid crystal display unit |
US12/469,841 US7773179B2 (en) | 2002-09-26 | 2009-05-21 | Patterning phase difference plate, production method for patterning phase difference plate, 2D/3D switching type liquid crystal display panel, and 2D/3D switching type liquid crystal display unit |
Applications Claiming Priority (4)
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JP2002-280593 | 2002-09-26 | ||
JP2002280573 | 2002-09-26 | ||
JP2002280593 | 2002-09-26 | ||
JP2002-280573 | 2002-09-26 |
Related Child Applications (2)
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US10529233 A-371-Of-International | 2003-05-28 | ||
US12/469,841 Division US7773179B2 (en) | 2002-09-26 | 2009-05-21 | Patterning phase difference plate, production method for patterning phase difference plate, 2D/3D switching type liquid crystal display panel, and 2D/3D switching type liquid crystal display unit |
Publications (1)
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WO2004029700A1 true WO2004029700A1 (ja) | 2004-04-08 |
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ID=32044620
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PCT/JP2003/006712 WO2004029700A1 (ja) | 2002-09-26 | 2003-05-28 | パターン化位相差板、パターン化位相差板の製造方法、2d/3d切替型液晶表示パネル、および2d/3d切替型液晶表示装置 |
Country Status (3)
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US (2) | US7557871B2 (ja) |
TW (1) | TWI231378B (ja) |
WO (1) | WO2004029700A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US20060164578A1 (en) | 2006-07-27 |
US7557871B2 (en) | 2009-07-07 |
TWI231378B (en) | 2005-04-21 |
TW200500644A (en) | 2005-01-01 |
US20090262268A1 (en) | 2009-10-22 |
US7773179B2 (en) | 2010-08-10 |
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