JP2004287406A - Patterning phase difference plate, liquid crystal display panel and manufacturing method for liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a patterning phase difference plate capable of realizing the improvement of yield by preventing the lowering of the phase difference of the patterning phase difference plate to be used and washing the patterning phase difference plate in a liquid crystal display panel including structure where the liquid crystal display panel for generating a display image is stuck to the patterning phase difference plate acting as a parallax barrier for giving the specified different viewing angles to a 1st display area and a 2nd display area on the display image respectively with a UV curing resin. <P>SOLUTION: An alignment layer 22 and a liquid crystal layer 23, to which specified alignment state is applied, are formed on a transparent substrate 21, and further a transparent protection film 24 is formed on the liquid crystal layer 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid crystal display panel capable of switching between a display state in which different images are displayed for a plurality of viewpoints and a display state in which one image is displayed in the entire screen area, such as a 2D / 3D switchable liquid crystal display panel. TECHNICAL FIELD The present invention relates to a patterned retardation plate used for a liquid crystal display, a liquid crystal display panel including the patterned retardation plate, and a method for manufacturing a liquid crystal display panel.

  In recent years, a 2D / 3D switching type liquid crystal display panel using a patterned retarder having different optical characteristics in different regions as a parallax barrier in a retarder having an alignment film and a liquid crystal layer formed on a substrate has been proposed. (For example, Patent Document 1).

  In a 2D / 3D switching type liquid crystal display panel using the patterned retarder as a parallax barrier, it is necessary to attach the patterned retarder to a polarizing plate of the liquid crystal panel. At this time, the positional accuracy required for bonding the parallax barrier and the polarizing plate is on the order of several μm. Therefore, before bonding the polarizing plate and the patterned retarder, that is, in a state where the polarizing plate and the patterned retarder are spatially separated from each other, they are aligned, and then it is necessary to bring them into close contact with each other. It is difficult from the point of view.

Therefore, in the 2D / 3D switching type liquid crystal display panel, when bonding the polarizing plate and the patterned retardation plate, the alignment is performed after the polarizing plate and the patterned retardation plate are brought into close contact with each other. In this case, a UV-curable resin is used for bonding the polarizing plate and the patterned retardation plate, and after the polarizing plate and the patterned retardation plate are adhered to each other, UV irradiation is performed to cure the resin. Can be
JP-A-10-123461 (publication date May 15, 1998)

  However, when the polarizing plate and the patterned retarder are laminated by the above-mentioned conventional laminating method, the UV curable resin and the liquid crystal layer of the patterned retarder are in direct contact with each other. Because it is a system resin, it is in a state of being easily mixed.

  Further, the liquid crystal layer of the patterned retardation plate is a mixture of monoacrylate and diacrylate, and when the UV-curable resin is cured in a state where the UV-curable resin and the liquid crystal layer of the patterned retardation plate are mixed. The diacrylate molecule is cross-linked at both ends, while the monoacrylate molecule is cross-linked at only one end. For this reason, since one end of the monoacrylate molecule is free, the orientation of the liquid crystal molecule in the liquid crystal layer is easily disturbed.

  Therefore, when the UV-curable resin contacts the liquid crystal layer of the patterned retardation film, the phase difference of the patterned retardation film drops, and there is a problem that the display quality of 2D / 3D is impaired.

  Further, the liquid crystal layer of the patterned retardation plate is a film that is very easily damaged, and it is difficult to perform cleaning after forming the liquid crystal layer. Therefore, if dust or dirt adheres to the liquid crystal layer of the patterned retardation plate before bonding the polarizing plate and the patterned retardation plate, it is difficult to remove the dust and dirt, and the surface is physically damaged. Easiness also causes a decrease in yield.

  The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a polarizing plate and a patterned retardation plate which are made of a UV-curable resin. An object of the present invention is to provide a patterned retardation plate capable of preventing the lowering of the film and enabling the cleaning thereof to improve the yield.

  In order to solve the above-mentioned problems, 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; And a liquid crystal layer formed on the liquid crystal layer, wherein a protective film is formed on the liquid crystal layer.

  According to the above configuration, the liquid crystal layer of the patterned retardation film is protected by the protective film. For this reason, in a configuration in which the patterned retarder is used as a parallax barrier of a 2D / 3D switching type liquid crystal display panel, for example, when the patterned retarder is bonded to a liquid crystal display panel used as a display image generating unit. In addition, the liquid crystal layer of the patterned retardation plate does not come into contact with the UV curable resin used as the adhesive.

  Thereby, it is possible to prevent the alignment disorder of the liquid crystal layer due to the mixing of the liquid crystal layer of the patterned retardation plate and the UV-curable resin, that is, the drop of the phase difference. In addition, it is possible to clean the patterned retardation plate without physically or chemically damaging the liquid crystal layer before bonding the patterned retardation plate and the liquid crystal display panel. This makes it possible to reduce defects such as bonding failure due to the above, and to improve the yield in a liquid crystal display panel using the patterned retardation plate.

  In the patterned retardation plate, it is preferable that the protective film can be formed at a low temperature of 150 ° C. or less.

  According to the above configuration, it is possible to prevent the liquid crystal layer formed earlier from being denatured or decomposed by heat when the protective film is formed.

  In the patterned retardation plate, the protective film may be formed of an inorganic material.

  In the patterned retardation plate, the protective film may be formed of an organic material that does not chemically affect the liquid crystal layer.

  According to another aspect of the present invention, there is provided a liquid crystal display panel comprising: a display image generating unit configured to generate a display image in accordance with input image data; a first display area in the display image; Liquid crystal having parallax barrier means for giving different specific viewing angles to the respective display areas, and switching means for switching between a first display state and a second display state by switching the effect of the parallax barrier means on / off. In the display panel, any of the above-described patterned retardation films is used as the parallax barrier means, and the patterned retardation film is oriented such that the surface on which the protective film is formed faces the display image generating means. It is characterized in that it is bonded to the display image generating means by using a UV curable resin.

  According to the above configuration, in the configuration in which the patterned retarder is used as, for example, a parallax barrier unit of a 2D / 3D switching type liquid crystal display panel, the liquid crystal display panel using the patterned retarder as a display image generating unit When bonding the patterned retarder, the liquid crystal layer of the patterned retarder is protected by the protective film, and the liquid crystal layer of the patterned retarder does not come into contact with the UV-curable resin used as the adhesive.

  Thereby, it is possible to prevent the alignment disorder of the liquid crystal layer due to the mixing of the liquid crystal layer of the patterned retardation plate and the UV-curable resin, that is, the drop of the phase difference. In addition, it is possible to clean the patterned retardation plate without physically or chemically damaging the liquid crystal layer before bonding the patterned retardation plate and the liquid crystal display panel. Therefore, it is possible to reduce defects such as defective bonding, and to improve the yield of the liquid crystal display panel.

  In the liquid crystal display panel, the total thickness of the protective film and the thickness of the UV-curable resin layer used for bonding the protective film to the display image generating means is preferably 50 μm or less. .

  When the total thickness of the protective film and the thickness of the UV-curable resin layer used for bonding to the display image generating means is 50 μm or less, for example, a decrease in 3D display performance can be suppressed.

  According to another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display panel, comprising: a display image generating unit configured to generate a display image according to input image data; and a first display area in the display image. Barrier means for providing different specific viewing angles to the display area and the second display area, and switching means for switching between the first display state and the second display state by switching on / off the effect of the parallax barrier means. Having the display image generating means, the parallax barrier means, and the switching means separately, and then manufacturing the liquid crystal display panel by bonding these, the parallax barrier means, It is manufactured by forming an alignment film and a liquid crystal layer on a transparent substrate, and further forming a protective film on the liquid crystal layer, and bonding the display image generating means and the parallax barrier means. When the display image generating means and the parallax barrier means are in close contact with each other via a UV-curable resin before curing in a direction in which the protective film forming surface of the parallax barrier means faces the display image generating means. The alignment is performed, and after the alignment is completed, the UV curable resin is cured by UV irradiation.

  According to the above configuration, it is possible to prevent the alignment disorder of the liquid crystal layer due to the mixture of the liquid crystal layer of the patterned retardation plate and the UV-curable resin, that is, to prevent the phase difference from dropping.

  In the method for manufacturing a liquid crystal display panel, it is preferable that the protective film is formed at a temperature of 150 ° C. or less at the time of forming the protective film.

  According to the above configuration, it is possible to prevent the liquid crystal layer formed earlier from being denatured or decomposed by heat when the protective film is formed.

  In the method for manufacturing a liquid crystal display panel, the protective film may have a thickness such that the total thickness of the protective film and a UV-curable resin layer used for bonding the protective film to the display image generating means is 50 μm or less. It is preferably formed.

  When the total thickness of the protective film and the thickness of the UV-curable resin layer used for bonding to the display image generating means is 50 μm or less, for example, a decrease in 3D display performance can be suppressed.

  As described above, the patterned retardation plate of the present invention has a configuration in which the protective film is formed on the liquid crystal layer.

  Therefore, in a configuration in which the patterned retarder is used as, for example, a parallax barrier of a 2D / 3D switching type liquid crystal display panel, when the patterned retarder is bonded to a liquid crystal display panel used as a display image generating unit, In addition, the liquid crystal layer of the patterned retardation plate does not come into contact with the UV curable resin used as the adhesive.

  This has the effect of preventing the alignment disorder of the liquid crystal layer due to the mixing of the liquid crystal layer of the patterned retardation plate and the UV-curable resin, that is, the reduction of the phase difference.

  In addition, it is possible to wash the patterned retardation plate before laminating the patterned retardation plate and the liquid crystal display panel. In addition, the present invention has an effect that the yield can be improved in a liquid crystal display panel using the same.

  An embodiment of the present invention will be described below with reference to FIGS. First, a schematic configuration of a liquid crystal display panel to which the patterned retarder according to the present embodiment is applied will be described with reference to FIG. In the following description, a case where the present invention is applied to a 2D / 3D switching type liquid crystal display panel will be exemplified. That is, in the 2D / 3D switching type liquid crystal display panel, 3D display is performed in the first display state in which the effect of the parallax barrier is enabled, and 2D display is performed in the second display state in which the effect of the parallax barrier is disabled. It can be carried out.

  As shown in FIG. 2, the 2D / 3D switching type liquid crystal display panel has a configuration in which a display liquid crystal panel 10, a patterned retardation plate 20, and a switching liquid crystal panel 30 are bonded.

  The display liquid crystal panel 10 is provided as a TFT liquid crystal display panel, and includes a first polarizing plate 11, a counter substrate 12, a liquid crystal layer 13, an active matrix substrate 14, and a second polarizing plate 15, which are laminated. Image data corresponding to an image to be displayed is input to the active matrix substrate 14 via a wiring 51 such as an FPC (Flexible Printed Circuits).

  That is, the display liquid crystal panel 10 is provided to give the 2D / 3D switching type liquid crystal display panel a function of generating a display screen according to image data. Note that the display method (TN method or STN method) and the drive method (active matrix drive or passive matrix drive) in the display liquid crystal panel 10 are not particularly limited as long as they have a function of generating a display screen. .

  The patterned retardation plate 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 a liquid crystal layer 23 thereon. This is a configuration in which a transparent protective film 24 is laminated. Further, in the active area of the patterned retardation plate 20, as shown in FIG. 3B, a first region 20A (shown by a hatched portion in the figure) and a second region 20A having different polarization states, respectively. 20B (indicated by a projection portion in the drawing) are alternately formed in a stripe shape.

  The switching liquid crystal panel 30 includes a drive-side substrate 31, a liquid crystal layer 32, a counter substrate 33, and a third polarizing plate 34, which are stacked to apply a drive voltage to the drive-side substrate 31 when the liquid crystal layer 32 is turned on. Are connected.

  The switching liquid crystal panel 30 is arranged to switch the polarization state of light passing through the switching liquid crystal panel 30 according to ON / OFF of the liquid crystal layer 32. The switching liquid crystal panel 30 does not need to be driven in a matrix like the display liquid crystal panel 10, and the driving electrodes provided on the driving side substrate 31 and the counter substrate 33 are formed on the entire active area of the switching liquid crystal panel 30. Just fine.

  Next, a display operation of the 2D / 3D switching type liquid crystal display panel having the above configuration will be described.

  First, in the 2D / 3D switching type liquid crystal display panel shown in FIG. 2, the direction of the optical axis of each component is illustrated in FIG. The optical axis shown in FIG. 4 is the direction of the slow axis in the alignment film (ie, 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.

  In the configuration of FIG. 4, the incident light emitted from the light source is first polarized by the third polarizing plate 34 of the switching liquid crystal panel 30. The switching liquid crystal panel 30 functions as a half-wave plate in the 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 20A and the second region 20B of the patterned retardation plate 20, the light passing through the first region 20A and the second region 20B The polarization state of the light passing through is different. In the example of FIG. 4, the polarization axes of the light passing through the first region 20A and the light passing through the second region 20B are different by 90 °. The patterned retardation plate 20 is set to function 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. At the time of 3D display, the polarization axis of light that has passed through the first region 20A of the patterned retardation plate 20 is parallel to the transmission axis of the second polarizing plate 15, and the light that has passed through the first region 20A is a polarizing plate. 15 through. On the other hand, the polarization axis of the light passing through the second region 20B forms an angle of 90 ° with the transmission axis of the second polarizing plate 15, and the light passing through the second region 20B does not pass through the polarizing plate 15.

  That is, in the configuration of FIG. 4, the function of the parallax barrier is achieved by the optical action related to the patterned retarder 20 and the second polarizer 15, and the first region 20 </ b> A in the patterned retarder 20 is transmitted. The region and the second region 20B are the blocking regions.

  The light that has passed through the second polarizing plate 15 is subjected to different optical modulation in the liquid crystal layer 13 of the display liquid crystal panel 10 between a pixel performing black display and a pixel performing white display, and the optical modulation is performed by the pixel performing white display. Image display is performed by transmitting only the received light through the first polarizing plate 11.

  At this time, light having a specific viewing angle given by passing through the transmissive region of the parallax barrier passes through pixels corresponding to the right-eye image and the left-eye image on the display liquid crystal panel 10, thereby causing the right-eye image to pass through. The image for use and the image for left eye are separated into different viewing angles, and 3D display is performed.

  When 2D display is performed, the switching liquid crystal panel 30 is turned on, and no optical modulation is given 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 so that different polarization states are given to the light that has passed through the first region 20A and the light that has passed through the second region 20B. Can be

  However, in the case of 2D display, unlike in the case of 3D display, since there is no optical modulation effect in the switching liquid crystal panel 30, the polarization axis of the light passing through the patterned retardation plate 20 is changed to the second polarization plate 15. Will be shifted symmetrically with respect to the transmission axis. Therefore, both the light that has passed through the first region 20A and the light that has passed through the second region 20B of the patterned retardation plate 20 pass through the second polarizing plate 15 at the same transmittance, and The function of the parallax barrier by the optical action related to the second polarizer 20 and 20 is not achieved (no specific viewing angle is given), and 2D display is performed.

  Next, an assembly process of the 2D / 3D switching type liquid crystal display panel will be described with reference to FIG.

  The 2D / 3D switching type liquid crystal display panel according to the present embodiment is completed by bonding separately manufactured display liquid crystal panel 10, patterned retardation plate 20, and switching liquid crystal panel 30.

  In the assembling process of the 2D / 3D switching type liquid crystal display panel, as shown in FIG. 5, the patterned retardation plate 20 is bonded to the display liquid crystal panel 10 with an adhesive such as a UV curable resin (S1). . Further, in this bonding step, the display liquid crystal panel 10 and the patterned retardation plate 20 are each adhered to each other with the display liquid crystal panel 10 and the patterned retardation plate 20 in close contact with each other via the UV-curable resin before curing. The alignment is performed by an alignment mark (not shown) formed on the substrate. Then, after the positioning is completed, the UV curable resin is cured by UV irradiation, and the bonding of the display liquid crystal panel 10 and the patterned retardation plate 20 is completed.

  At this time, the patterned retardation plate 20 is bonded in a direction in which the transparent protective film 24 faces the display liquid crystal panel 10. This is because, when the transparent substrate 21 is bonded to the display liquid crystal panel 10 so as to be opposed to the display liquid crystal panel 10, the distance between the active surface of the display liquid crystal panel 10 and the active surface of the patterned retardation plate 20 becomes large. This is because the parallax barrier effect at the time cannot be obtained.

  Further, the switching liquid crystal panel 30 is attached to the display liquid crystal panel 10 with the patterned retardation plate 20 with an adhesive, thereby completing the 2D / 3D switching type liquid crystal display panel (S2 to S3).

  The present invention provides a structure for preventing the UV-curable resin and the liquid crystal layer 23 of the patterned retardation plate 20 from being mixed when the patterned retardation plate 20 is bonded to the display liquid crystal panel 10 with the UV-curable resin. It is characterized by the following. Therefore, the patterned retardation plate 20 has a configuration in which a transparent protective film 24 is formed on the upper surface of the liquid crystal layer 23 as shown in FIG. The manufacturing process of the patterned retardation plate 20 will be described with reference to FIGS.

  In the manufacturing process of the patterned retardation plate 20, as shown in FIG. 6, first, the glass to be the transparent substrate (substrate material) 21 is washed, and polyimide is applied to one side of the washed substrate and fired. This forms the alignment film 22 (S11 to S13). Next, 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 first region 20A. FIG. 1A shows a state in which the processes of S11 to S14 are completed.

  After the first rubbing, a resist is applied to the cleaned alignment film 22 of the substrate and calcined to form a resist layer 41 (S15 to S16). FIG. 1B shows a state in which the processing of S15 to S16 is completed.

  After the formation of the resist layer 41, the resist layer 41 is patterned by the steps of exposure, development and drying (S17 to S18). The patterned resist layer 41 forms a mask portion 41a that masks a portion to be the first region 20A of the patterned retardation plate 20. 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 on which the resist layer 41 has been patterned in this manner from the resist layer 41 side (S19). The rubbing direction in the second rubbing is the rubbing direction of the second region 20B. At this time, in the first region 20A where the alignment film 22 is covered with the mask portion 41a, the direction of the slow axis formed by the first rubbing is maintained, but the first region exposed without being covered with the mask portion 41a. In the second region 20B, the direction of the slow axis is along the rubbing direction of the second rubbing. FIG. 1D shows a state in which the process of S19 is completed.

  After the second rubbing, the resist remaining on the cleaned alignment film 22 of the substrate is exposed and developed again to remove the mask portion 41a, and then dried (S20 to S22). FIG. 1E shows a state in which the processing from S20 to S22 is completed.

  On the substrate from which the mask portion 41a has been removed, a UV-curable liquid crystal solution is applied on the alignment film 22 by a spin coating method or the like, and the UV-curable liquid crystal solution is further irradiated with UV to form liquid crystal molecules. Are crosslinked and polymerized (S23-S24). Thus, the liquid crystal layer 23 is formed. FIG. 1F shows a state in which the process of S24 is completed.

  Next, the transparent protective film 24 is formed on the liquid crystal layer 23 by a method such as a spin coating method, a sol-gel method, and a sputtering method (S25). FIG. 1 (g) shows a state in which the process of S25 has been completed.

  The processes of S11 to S25 are performed so that a plurality of patterned retardation plates 20 are collectively formed on one large substrate. For this reason, the substrate on which the plurality of patterned retarders 20 are formed is divided into individual patterned retarders 20, and inspection and cleaning are performed to complete the patterned retarders 20 (S26 to S29). .

Regarding the properties of the transparent protective film 24, at least the following three conditions are required.
(1) It has no optical anisotropy.
(2) A film can be formed at a low temperature of 150 ° C. or less.
(3) The total thickness of the adhesive layer (UV curable resin) used for bonding the display liquid crystal panel 10 to the display liquid crystal panel 10 is 50 μm or less.

  The condition (1) is a condition necessary to prevent the display quality of 2D / 3D from deteriorating due to the optical action of the transparent protective film 24 itself.

  The condition (2) is a condition necessary for preventing the liquid crystal layer 23 from being denatured or decomposed by heat when the transparent protective film 24 is formed.

  The condition (3) limits the distance between the active surface of the patterned retardation plate 20 (that is, the liquid crystal layer 23) serving as a parallax barrier and the active surface of the display liquid crystal panel 10 (that is, the liquid crystal layer 13). This is a necessary condition for suppressing a decrease in 3D display performance.

Since the transparent protective film 24 does not need to function as an electrode, the transparent protective film 24 may be formed as a film having any property of a transparent conductive film such as ITO or ZnO or a transparent insulating film such as SiO _2. I do not care. The transparent protective film 24 may be formed using not only an inorganic material but also an organic material as long as the solvent used does not chemically change the liquid crystal layer 23 of the patterned retardation plate 20. .

  As described above, in the 2D / 3D switching type liquid crystal display panel according to the present embodiment, the liquid crystal layer 23 in the patterned retardation plate 20 is protected by the transparent protective film 24. For this reason, in the above configuration in which the patterned retardation plate 20 is used as a parallax barrier of a 2D / 3D switching type liquid crystal display panel, when the patterned retardation plate 20 is bonded to the display liquid crystal panel 10, The 20 liquid crystal layer 23 does not come into contact with the UV curable resin used as an adhesive. Thereby, the alignment disorder of the liquid crystal layer 23 due to the mixture of the liquid crystal layer 23 and the UV-curable resin can be prevented, that is, the drop of the phase difference can be prevented.

  In addition, before the patterned retardation plate 20 and the display liquid crystal panel 10 are bonded to each other, the patterned retardation plate 20 is not damaged physically and chemically to the liquid crystal layer 23 of the patterned retardation plate 20. Washing is also possible. As a result, defects such as bonding failure due to adhesion of dust and dirt can be reduced, and the yield can be improved in a 2D / 3D switching type liquid crystal display panel using the patterned retardation plate 20.

  Note that a 2D / 3D switchable liquid crystal display device is provided by mounting a drive circuit, a backlight, and the like on the 2D / 3D switchable liquid crystal display panel according to the present embodiment.

  In the above description, the case where the present invention is applied to the 2D / 3D switching type liquid crystal display panel has been exemplified. However, in the liquid crystal display panel according to the present invention, the liquid crystal display panel is separated at different viewing angles in the first display state. The images are not only required to be related to each other like the right-eye image and the left-eye image, but the liquid crystal display panel according to the present invention is not limited to the 2D / 3D switching type liquid crystal display panel.

  For example, the liquid crystal display panel according to the present invention performs a screen display that displays different video sources in each of the first display area and the second display area separated by the parallax barrier unit in the first display state. In the display state of 2, the present invention can be applied to a liquid crystal display panel that performs a screen display for displaying the same video source in the entire screen area.

  An example of the use of such a liquid crystal display panel is a display device that displays an image of a car navigation system to a driver in a driver's seat of a car and an image of a television broadcast to a passenger in a passenger seat. Can be considered. When different images are displayed to a plurality of observers, the light transmitted through each pixel is shielded by a parallax barrier so that the plurality of observers at a predetermined distance can be separated as images to be observed. What is necessary is just to set the arrangement | positioning pattern of a part and a transmission part suitably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows one embodiment of the present invention, and FIG. 1 (a) to FIG. 1 (g) are cross-sectional views showing a manufacturing process of a patterned retardation plate. It is sectional drawing which shows schematic structure of the 2D / 3D switching type liquid crystal display panel using the said patterned retardation plate. FIG. 3A is a cross-sectional view, and FIG. 3B is a plan view, showing a configuration of the patterned retardation plate. It is a figure which shows the direction of the optical axis of each component in the said 2D / 3D switching type liquid crystal display panel. It is a flowchart which shows the assembly process of the said 2D / 3D switching type liquid crystal display panel. It is a flowchart which shows the manufacturing process of the said patterned retardation plate.

Explanation of reference numerals

10. Liquid crystal panel for display (display image generating means)
20 Patterned phase difference plate (parallax barrier means)
21 Transparent substrate (substrate material)
22 Alignment film 23 Liquid crystal layer 24 Transparent protective film (protective film)
30 Switching liquid crystal panel (switching means)

Claims (7)

In a patterned retardation plate having, on a substrate material, an alignment film in which first and second alignment regions having different alignment directions are formed, and a liquid crystal layer formed on the alignment film,
A patterned retardation plate, wherein a protective film is formed on the liquid crystal layer.   The patterned retardation plate according to claim 1, wherein the protective film can be formed at a low temperature of 150C or less.   The patterned retardation plate according to claim 1, wherein the protective film is formed of an inorganic material.   The patterned retardation plate according to claim 1, wherein the protective film is formed of an organic material that does not chemically change the liquid crystal layer. Display image generation means for generating a display image in accordance with input image data, parallax barrier means for providing different specific viewing angles to the first display area and the second display area in the display image, A liquid crystal display panel having switching means for switching between a first display state and a second display state by switching on / off of the effect of the barrier means;
The patterned phase difference plate according to claim 1 is used as a parallax barrier means,
A liquid crystal, wherein the patterned retardation plate is bonded to the display image generating means using a UV curable resin in a direction in which a surface on which the protective film is formed faces the display image generating means. Display panel. Display image generation means for generating a display image in accordance with input image data, parallax barrier means for providing different specific viewing angles to the first display area and the second display area in the display image, Switching means for switching between a first display state and a second display state by switching on / off of the effect of the barrier means, wherein the display image generating means, the parallax barrier means, and the switching means are separately provided After being created, in the method of manufacturing a liquid crystal display panel to manufacture a liquid crystal display panel by bonding these,
The parallax barrier means is manufactured by forming an alignment film and a liquid crystal layer on a transparent substrate, and further forming a protective film on the liquid crystal layer,
When the display image generating unit and the parallax barrier unit are attached to each other, the display image generating unit and the parallax barrier unit are cured in a direction in which the protective film forming surface of the parallax barrier unit faces the display image generating unit. A method for manufacturing a liquid crystal display panel, wherein the alignment is performed in a state of being in close contact with the previous UV-curable resin, and after the alignment is completed, the UV-curable resin is cured by UV irradiation.   7. The method according to claim 6, wherein the protective film is formed at a temperature of 150 [deg.] C. or less during the film formation.

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