JP4725606B2 - Manufacturing method of split wave plate filter - Google Patents

Description

  The present invention relates to a method of manufacturing a divided wave plate filter of a stereoscopic image display device, for example.

  Conventionally, various attempts have been made for techniques for expressing images in three dimensions, and display methods relating to three-dimensional images have been studied and put into practical use in many fields such as photography, movies, and television. Three-dimensional image display methods can be broadly divided into glasses and glasses-free methods, and both methods allow images with binocular parallax to be input to the left and right eyes of the observer and viewed as stereoscopic images. .

  Typical examples of the glasses type include an anaglyph method in which so-called red and blue glasses are worn and a polarized glasses method. A color separation method such as anaglyph has many disadvantages in terms of quality, such as difficulty in color expression and deterioration of the field of view. In addition, the polarized glasses method generally requires the use of two projectors. In recent years, however, a method has been proposed that enables stereoscopic display on a single direct-view display device.

  FIG. 19 shows an outline of a stereoscopic image display apparatus using the polarized glasses method.

  The stereoscopic image display apparatus 200 has a structure including a liquid crystal panel unit 201 and a divided wavelength plate filter unit 202 attached to the liquid crystal panel unit 201. In the liquid crystal panel unit 201, a pair of transparent support bases 204 and 206 are formed between a pair of polarizing plates 203 and 207, and a pixel liquid crystal unit 205 in which RGB pixels are formed therebetween is provided. A split wave plate filter unit 202 is provided on the surface of the liquid crystal panel unit 201. For example, the split wave plate 208 is arranged on one side of the transparent support base 209 every other line. The divided wave plate filter unit 202 is also referred to as a micropole (μ-Pol) or a micropolarizer.

  The stereoscopic image display apparatus 200 having such a structure converts the linearly polarized light from the even and odd lines of the display screen into orthogonal ones by rotating the direction of the linearly polarized light emitted from the liquid crystal panel unit 201. Yes. That is, the linearly polarized light from the liquid crystal panel is emitted as it is from the even lines, and is converted into the linearly polarized light orthogonal to the odd lines by the action of the divided wavelength plate 208.

  By observing the light of this display device with glasses 210 having polarization directions orthogonal to each other, the light of the right eye image is incident on the right eye and the light of the left eye image is incident on the left eye. By viewing with the glasses 210, it is possible to view a full-color and flicker-free stereoscopic image.

  That is, the stereoscopic image display apparatus 200 can display a stereoscopic image by combining the configuration of the liquid crystal panel unit 201 and the configuration of the divided wavelength plate filter unit 202, and can view this as a stereoscopic image by the polarizing glasses 210. is there. On the liquid crystal panel side, the pixel liquid crystal unit 205 is disposed between the pair of transparent support bases 204 and 206, and includes a combination of a red pixel unit (R), a green pixel unit (G), and a blue pixel unit (B). Pixel portions of three colors are arranged in a matrix.

  Then, the light that has passed through the polarizing plate 207 disposed on the viewer side of the transparent support base 206 becomes linearly polarized light, and the light of the linearly polarized light reaches the divided wavelength plate filter unit 202. The divided wave plate filter unit 202 is provided with a transparent support base 209 made of glass or the like that functions as a frame, and each band-like divided wave plate 208 is formed on the transparent support base 209 on the liquid crystal panel 201 side. Each of the divided wavelength plates 208 is extended so that the longitudinal direction thereof is the horizontal direction, and the band-like width is approximately the same as the pixel pitch of the pixel liquid crystal unit 205. The number of divided wavelength plates 208 is half of the number of pixels in the vertical direction of the pixel unit 205.

  Since each band-shaped divided wavelength plate 208 is formed every other line at the pixel pitch of the pixel liquid crystal unit 205, either the right-eye stereoscopic image or the left-eye stereoscopic image is divided into the divided wavelength plate 208. By passing, the polarization direction is rotated by 90 degrees, and the stereoscopic image on the side not passing through the divided wave plate 208 is emitted as it is without rotating the polarization direction.

  In this way, when the polarization direction is controlled differently for each line and passes through the divided wavelength plate 208, two types of orthogonal linearly polarized light are mixed. Therefore, the viewer can wear the polarized glasses 210, selectively receive the stereoscopic image for the right eye and the stereoscopic image for the left eye with both eyes, and view the stereoscopic image.

  The stereoscopic image display apparatus 200 configured as described above can accurately view the stereoscopic image without crosstalk or the like so that the band-shaped divided wavelength plate 208 can accurately correspond to the pixel pitch. It is important that they are arranged accurately with respect to the stripe lines of the pixel liquid crystal unit 205.

  Accordingly, the divided wavelength plate 208 formed with a fine width (100 to 200 μm) is manufactured with high accuracy, and is arranged with a uniform thickness with an accurate line shape every other line with respect to the lines of the pixel liquid crystal unit 205. In addition, it is required to manufacture the divided wavelength plate 208 having in-plane uniformity with high reproducibility.

  FIG. 20 is a schematic perspective view showing an example of a conventional method for manufacturing the divided wave plate 208 (see Patent Document 1 described later). That is, a grinder (dicer) 20 is used to manufacture the conventional divided wavelength plate 208, and a retardation material layer (for example, a retardation film) provided on a transparent support base (hereinafter referred to as a glass substrate) 209 as described above. ) When forming 3 in a stripe shape, the phase difference material layer 3 is scraped for each line using a grinder 20 having a grindstone with a fine width, and a fine width removing portion 4 and a divided wavelength plate 208 are formed. It was.

JP-A-10-160933 (paragraph numbers [0037] to [0041], [FIG. 2])

  However, in the manufacturing method shown in FIG. 20, since the phase difference material layer 3 made of resin is scraped by the grinder 20, the accuracy may be difficult to obtain due to clogging of the grindstone of the grinder 20, and the resin is softened by frictional heat. Therefore, it is difficult to rotate the grinder 20 at high speed, and the grinders 20 cannot be arranged in multiple rows, so that there is a problem of lack of mass productivity, and an immediate solution to these problems is required.

  Accordingly, an object of the present invention is to provide a method for manufacturing a divided wave plate filter that is excellent in pattern accuracy, uniform thickness, in-plane uniformity, and has high reproducibility and mass productivity so as to accurately correspond to a pixel portion. is there.

That is, the present invention is a method of manufacturing a divided wavelength plate filter that controls the polarization direction of light obtained from each image region divided in accordance with parallax in an image display unit,
After the alignment film material layer is printed on the entire surface or in a predetermined pattern on the substrate, it is rubbed, and after the photopolymerizable monomer layer to be a divided wavelength plate is printed on the entire alignment film or in a divided pattern, The photopolymerizable monomer layer is exposed to a polymer to be polymerized and oriented.
The present invention relates to a method for manufacturing a divided wavelength plate filter.

The present invention is a method for manufacturing a divided wavelength plate filter for controlling the polarization direction of light obtained from each image region divided in accordance with parallax in an image display unit,
A photopolymerizable monomer layer to be a divided wavelength plate is printed on the entire surface or in a divided pattern on the substrate, the photopolymerizable monomer layer is polymerized by exposure treatment, and then this polymer layer is rubbed and oriented.
A method of manufacturing a divided wave plate filter is also provided.

  According to the production method of the present invention, the photopolymerizable monomer layer printed in the whole surface or in the divided pattern is exposed on the alignment film formed by rubbing the alignment film material layer printed on the whole surface or in a predetermined pattern on the substrate, and the polymer is exposed. The photopolymerizable monomer layer printed on the entire surface or in a divided pattern is polymerized by exposure treatment, and then the polymer layer is rubbed for orientation treatment. It becomes easy to form retardation characteristics in the polymer layer along the direction.

  In addition, since the alignment film material layer and / or the photopolymerizable monomer layer is formed by printing, the alignment film and the monomer layer (and therefore the divided wavelength plate) can be formed to have a constant film thickness.

  Therefore, the divided wave plate can be accurately formed in a predetermined pattern on the substrate by a simple process, and a method for manufacturing a divided wave plate filter with high mass productivity can be realized.

  Embodiments of the present invention will be described below.

  In the production method of the present invention, it is desirable to coat the obtained divided wavelength plate with a protective film.

  Next, embodiments of the present invention will be specifically described with reference to the drawings.

  First, from the reference example of the present invention, the divided wave plate material layer, the alignment film material layer, the adhesive layer, and the like as the material layer to be the divided wave plate are mainly printed (pasted) in the process of formation. A film having a phase difference characteristic on an adhesive layer or an adhesive layer arranged in a predetermined division pattern on a substrate, and cutting and removing the film into a predetermined division pattern; After the alignment film material layer is formed on the entire surface or a predetermined pattern on the substrate, the alignment film material layer is subjected to alignment treatment, and the divided wavelength plate material is disposed on the entire surface or the predetermined pattern on the alignment film material layer. To form a divided wave plate, or to form a divided wave plate by direct alignment treatment on the divided wave plate material layer disposed on the substrate.

[Reference Example 1]
FIG. 1 shows that in the process of forming a divided wave plate, in order to divide the divided wave plate material layer into a predetermined divided pattern, an adhesive or the like is printed on the substrate, and then the divided wave plate material layer is arranged. It is a schematic perspective view which shows the process until it cut | disconnects to a division | segmentation pattern, (a) is the state which has arrange | positioned the adhesive agent or adhesive agent on the board | substrate, (b) is the state which affixed the division | segmentation wavelength plate material layer on this , (C) shows the cut state. In addition, the same code | symbol is used for a site | part common to the prior art example shown in FIG. 19 (other examples are also the same).

  As shown in FIG. 1A, first, an adhesive or pressure-sensitive adhesive (hereinafter referred to as an adhesive) 2 is printed on a glass substrate (hereinafter simply referred to as a substrate) 209 in a predetermined division pattern. Provide. Thereby, an adhesive agent can be formed in fixed thickness. Next, as shown in FIG.1 (b), the division | segmentation wavelength plate material layer 3 is provided in the whole surface on this. In FIG. 1, a film having retardation characteristics is attached as the divided wavelength plate material layer 3. However, after a material described later is disposed on the entire surface, it may be subjected to an orientation treatment in a predetermined pattern.

  Next, as shown in FIG.1 (c), it cuts collectively with the cutting blade (for example, knife) 5 along the pattern of the adhesive agent 2 distribute | arranged on the board | substrate 209 previously. The cutting blades 5 are arranged in multiple rows so that collective cutting is possible, but is illustrated in a simplified manner in FIG. By this cutting, the region where the adhesive 2 exists and the region where the adhesive 2 does not exist are divided, and the divided wavelength plate material layer 3 in the region where the adhesive 2 does not exist is wound around a winding device (not shown). Thereby, the divided wavelength plates 208 arranged every other line can be formed with high accuracy so as to correspond to the pixel pitch lines of the pixel liquid crystal unit 205 shown in FIG.

  1A to 1C are cross-sectional views (ie, a'-a 'cross-section, b'-b' cross-section, c'-c 'cross-section) are shown below the respective drawings. Thereby, as shown in the cross section (b) ′ of b′-b ′ in (b), the thickness t of the divided wavelength plate material layer 3 formed on the substrate 209 is 5 to 30 μm, and in (c) As shown in the c′-c ′ cross section (c) ′, the width W of the region to be the divided wavelength plate is formed to be 100 to 200 μm. In addition, as shown in FIG.1 (c), after cutting | disconnection, it coat | covers with the protective film (it shows with a virtual line) 6.

  For example, printing is performed using the apparatus shown in FIG. FIG. 2 shows a schematic view of this device. That is, the printing roll 23 and the anix roll 22 that rotates in contact with the printing roll 23 are disposed above the table 21 in a fixed position, and these rolls are driven and rotated in the directions of the arrows, respectively. At an oblique upper position of the anix roll 22, a doctor blade 24 is disposed with a certain gap D between the anix roll 22 and the roll surface 22 a of the anix roll 22. A material to be a divided wavelength plate is supplied as the printing material 1 between the doctor blade 22 and the doctor blade 24. Therefore, the printing material 1 is applied with a constant film thickness by the gap D described above.

  On the roll surface 23a of the printing roll 23, a predetermined pattern for forming the divided wavelength plate is formed as a convex master as designed, while the printing material 1 supplied to the roll surface 22a of the anix roll 22 is The doctor blade 24 is controlled to have a constant thickness, adheres to the anix roll surface 22a, and is conveyed downstream in the rotational direction.

  Accordingly, the printing material 1 adhered to the roll surface 22a of the anix roll adheres to the convex portion of the original plate formed on the roll surface of the printing roll 23 and is conveyed between the printing roll 23 and the table 21 in the direction of the arrow. It is transferred to the surface of the substrate 209 in a predetermined pattern. The printing material 1 to be transferred is the above-described adhesive 2 or an alignment film material or a divided wavelength plate material described later.

  In FIG. 2, the rubbing roll 26 indicated by a solid line on the upstream side of the printing roll 23 and the rubbing roll 26 indicated by an imaginary line on the downstream side with respect to the traveling direction of the substrate 209 are oriented films or divisions provided on the substrate 209. The wave plate material is disposed for orientation treatment.

  According to this reference example, a convex original plate having a predetermined pattern is formed on a roll surface 23a of a printing roll 23 as set, and an adhesive 2 as a printing material 1 (or an alignment film material or a divided wavelength plate material described later) is used. Is formed in a predetermined pattern by printing on the substrate 209, so that the shape of the pattern and the thickness of the printing can be formed constant, and the divided wavelength plate material layers 3 adhered thereon are arranged in multiple rows in a predetermined pattern with a cutter 5 Since it is cut in a lump, it can be formed with high accuracy and is mass-productive. The requirement for a divided wave plate filter of a stereoscopic image display device (that is, accuracy and mass-productivity that can be arranged accurately every other line corresponding to the pixel pitch line) Etc.) can be satisfied, and a method for producing a divided wave plate filter can be provided.

[Reference Example 2]
In FIG. 3, the divided wavelength plate material layer 3 is formed by printing on a substrate 11 as a second substrate, and an adhesive layer 2a is formed in a predetermined pattern on the substrate 209 as a first substrate. The schematic sectional drawing which shows the process which transfers the division | segmentation wavelength plate material layer 3 to the board | substrate 209 via the layer 2a, and forms a division | segmentation wavelength plate by transcription | transfer is shown.

  First, as shown in FIG. 3A, the divided wavelength plate material layer 3 is formed on the entire surface of the substrate 11 with a constant thickness by, for example, the printing method shown in FIG.

  Next, as shown in FIG. 3B, for example, by the printing method shown in FIG. 2, an adhesive layer 2a having a large adhesive force as a high adhesion layer is arranged on the substrate 209 in a predetermined pattern as designed. As shown in FIG. 3C, both the substrates 11 and 209 are brought into contact with each other and pressed against each other.

  Next, as shown in FIG. 3D, these substrates 11 and 209 are separated by separation. At this time, the substrate 11 may be moved downward, and conversely, the substrate 209 may be moved upward. By this separation, the divided wavelength plate material layer 3 at a position corresponding to the adhesive 2a of the substrate 209 is transferred from the substrate 11 to the substrate 209 side and can be arranged in a predetermined pattern. Thereby, the divided wavelength plates 208 arranged every other line can be formed with high accuracy so as to correspond to the pixel pitch lines of the pixel liquid crystal unit 205 shown in FIG.

  Next, as shown in FIG. 3 (e), the substrate 209 is inverted and turned over, and the surface of the divided wavelength plate material layer 3 is subjected to orientation treatment using a rubbing roll 26 as shown in FIG. Thus, after the divided wavelength plate 208 is formed, the entire surface is covered with the protective film 6.

  Although not shown in FIG. 3, the divided wavelength plate material layer 3 ′ is also formed in a predetermined pattern on the side of the substrate 11 where the divided wavelength plate material layer 3 ′ that is not transferred remains, for example, the substrate 11 If unnecessary portions at both ends are cut and removed, the substrate 11 having the divided wavelength plate material layer 3 ′ having the same pattern as that of the substrate 209 side is obtained. It can also be used as a plate filter.

  According to this reference example, the divided wavelength plate material layer disposed on the entire surface of the substrate 11 with a constant thickness via the adhesive 2a having a large thickness and disposed on the substrate 209 in a predetermined pattern. 3 is transferred to the substrate 209 side, so that the divided wavelength plate material layer 3 can be formed on the substrate 209 with high accuracy and is mass-productive, so that a requirement for a divided wavelength plate filter of a stereoscopic image display device (that is, pixel pitch) It is possible to provide a method of manufacturing a divided wave plate filter that can satisfy the accuracy and mass productivity that can be accurately arranged every other line corresponding to the line.

  Further, since the divided wavelength plate material layer 3 ′ remains accurately and arranged in a predetermined pattern on the opposite substrate 11, the divided wavelength plate 208 is simultaneously formed on two substrates by this transfer process as designed. Since it can be formed into a pattern and an accurate divided wave plate filter can be manufactured by a simple process, a manufacturing method with higher mass productivity can be provided.

  Specific examples of the above-described divided wavelength plate material layer, alignment film material layer, and alignment processing thereof are shown in FIGS.

  First, in FIG. 4, after the above-described divided wavelength plate material layer 3 and an alignment film material layer, which will be described later, are formed on the substrate 209 by, for example, printing using the printing method shown in FIG. It is a figure which shows the concept which carries out an orientation process as shown in FIG. As the divided wavelength plate material layer, a birefringent liquid crystal polymer of a thermotropic phase or a lyotropic phase is used as an ink, or a photopolymerizable monomer is used.

<Specific example 1>
FIG. 5 is an example of the case where a thermotropic phase birefringent liquid crystal polymer or a lyotropic phase birefringent liquid crystal polymer is used as the ink layer 9, and a schematic cross section of a process of forming a divided wave plate using the ink layer 9. The figure is shown.

  First, as shown in FIG. 5 (a) as a pretreatment, an alignment film 8 is formed on the entire surface of the substrate 209 by using, for example, polyimide as a material. Then, as shown in FIG. The processing unit 8a is formed.

  Next, as shown in FIG. 5C, an ink layer 9 is formed on the entire surface by printing. Since the ink layer 9 composed of the thermotropic phase is a birefringent liquid crystal polymer that melts by heating and changes phase at this temperature, printing is performed on the alignment film 8 by heating and melting, so that an alignment treatment portion of the alignment film 8 is obtained. The ink layer 9 in the region above 8a changes in phase along the alignment direction of the alignment processing portion 8a.

  Further, in the case of the ink layer 9 composed of a lyotropic phase, since this polymer is a birefringent liquid crystal polymer that undergoes a phase change when dissolved in a solvent, the region on the alignment processing portion 8a can be obtained by printing a solution dissolved in the solvent. The ink layer 9 changes in phase along the alignment direction of the alignment processing portion 8a as the solvent evaporates.

  Next, as shown in FIG. 5D, the entire surface of the ink layer 9 is subjected to a heat treatment as a post-treatment, whereby the orientation of the ink layer 9a in the phase-changed portion is enhanced and the ink layer 9 composed of a lyotropic phase is formed. In this case, the divided wavelength plate 208 having a fixed orientation direction can be formed by evaporating the solvent.

<Specific example 2>
FIG. 6 shows another example of the case where a birefringent liquid crystal polymer having a thermotropic phase or a birefringent liquid crystal polymer having a lyotropic phase is used as the ink layer 9 (however, the explanation will be given for the thermotropic phase). The schematic sectional drawing of the process which forms a division | segmentation wavelength plate is shown.

  First, as shown in FIG. 6A, the alignment film 8 is formed on the entire surface of the substrate 209 using, for example, polyimide as a pretreatment, and then the entire upper surface of the alignment film 8, for example, as shown in FIG. 6B. Is rubbed to form the alignment treatment portion 8a.

  Next, as shown in FIG. 6C, an ink layer 9 is formed in a predetermined pattern on the orientation processing portion 8a by printing. Therefore, as in the above example, since the ink layer 9 is a birefringent liquid crystal polymer that changes in phase with temperature, it is heated and melted and printed on the alignment film 8 to form the entire surface on the alignment film 8 subjected to the alignment treatment. The ink layer 9 thus changed into the ink layer 9 that has undergone phase change along the alignment direction of the alignment processing portion 8a.

  Next, as shown in FIG. 6 (d), in this post-treatment, similarly to the above example, the ink layer 9 is heat-treated, whereby the orientation of the ink layer 9 is strengthened and the orientation direction is fixed. 208 can be formed.

  The method of using the thermotropic phase birefringent liquid crystal polymer or the lyotropic phase birefringent liquid crystal polymer as the ink layer 9 is not limited to the above examples, and can be modified. 7 and 8 show typical modifications.

  In this modification, first, as shown in FIG. 7A, after an alignment film 8 made of polyimide, for example, is formed on a substrate 209 by printing in a predetermined pattern, as shown in FIG. The upper surface of the alignment film 8 is rubbed to form an alignment processing portion 8a.

  Next, as shown in FIG. 7C, an ink layer 9 is formed on the entire surface by printing. Therefore, as in the above example, the portion of the ink layer 9 existing on the alignment film 8a that has been subjected to the alignment treatment can be phase-changed along the alignment direction of the alignment film 8a to form the divided wavelength plate 208.

  In the next modification, first, as shown in FIGS. 8A and 8B, an alignment film 8a is formed as in FIG.

  Next, as shown in FIG. 8C, by forming an ink layer 9 in a predetermined pattern only on the alignment film 8 by printing, as in the above example, along the alignment direction of the alignment film 8a subjected to the alignment treatment. The divided wavelength plate 208 can be formed by the phase change of the ink layer 9.

  The alignment treatment in the case of using the thermotropic phase birefringent liquid crystal polymer or the lyotropic phase birefringent liquid crystal polymer may be performed simultaneously with printing (not shown).

Embodiment 1
Next, Embodiment 1 of the present invention will be described.

  FIG. 9 is an example in the case where a photopolymerizable monomer is used as the ink layer 12, and is a schematic cross-sectional view of a process for forming a divided wavelength plate using the ink layer 12. Finally, the monomer is polymerized. As a basic process, (1) an alignment film is used as a base, and (2) alignment treatment is performed after polymerization.

  FIG. 9 is an example in which an alignment film is used as the base of the above (1), and a schematic process cross-sectional view is shown. That is, as shown in FIG. 9A, after the alignment film material layer 8 made of polyimide, for example, is formed on the entire surface of the substrate 209 by printing shown in FIG. As shown, the alignment film material layer 8 is rubbed into a predetermined pattern to form an alignment processing portion 8a (alignment film).

  Next, as shown in FIG. 9C, an ink layer 12 made of a photopolymerizable monomer is formed on the entire upper surface by printing, and then the entire surface is exposed. By this exposure, the ink layer 12 is polymerized, and the ink layer 12 existing above the alignment processing portion 8a of the alignment film 8 changes in phase along the alignment direction of the alignment processing portion 8a to form the divided wavelength plate 208. be able to.

[Reference Example 3]
FIG. 10 is an example in which a monomer is polarized and exposed without an alignment film, and a schematic cross-sectional view of the process is shown. That is, as shown in FIG. 10A, the ink layer 12 is formed on the substrate 209 by printing in a predetermined pattern.

  Next, as shown in FIG. 10B, the entire surface of the substrate 209 is exposed to polarized light. By this polarization exposure processing, the ink layer 12 arranged in a predetermined pattern on the substrate 209 changes in phase, and the divided wavelength plate 208 can be formed. Although not shown, the divided wavelength plate 208 can be formed by forming the ink layer 12 on the entire surface of the substrate 209 and polymerizing it, and then performing a rubbing process in a predetermined pattern.

Embodiment 2
FIG. 11 is an example in which the orientation treatment is performed after the polymerization of (2) described above, and a schematic cross-sectional view of the process is shown. That is, for example, as shown in FIG. 11 (a), the ink layer 12 is formed on the entire surface of the substrate 209 without printing with an alignment film, and this is exposed to the entire surface to form a polymer. The wave plate 208 can also be formed.

[Reference Example 4]
The method of using the photopolymerizable monomer as the ink layer 12 is not limited to the above examples, and can be carried out by being modified. An example is shown in FIG.

  In this example, first, as shown in FIG. 12A, an ink layer 12 is formed on the entire surface of the substrate 209, an exposure mask 15 is arranged in a predetermined pattern above the ink layer 12, and then the entire surface is polarized and exposed. To do. As a result, the ink layer 12 in the non-mask portion is subjected to orientation treatment and polymerized.

  Next, as shown in FIG. 12B, the exposure mask 15 is removed and the entire surface is further exposed. As a result, the ink layer 12 in the region not subjected to the polarization exposure by the exposure mask 15 is also polymerized, and the divided wavelength plate 208 can be formed in the region subjected to the polarization exposure.

[Reference Example 5]
FIG. 13 shows a schematic diagram of an example without the above-described alignment treatment.

  That is, as shown in FIG. 13A, the divided wavelength plate material layer 3 is formed on the entire surface of the substrate 209, and the heat absorbing ink layer 14 is formed on the substrate 209 in a predetermined pattern by, for example, the printing method shown in FIG. Print. As the divided wavelength plate material layer 3, for example, a film having retardation characteristics is attached on the substrate 209.

  Next, as shown in FIG. 13B, the divided wave plate material layer 3 under the heat-absorbing ink layer 14 loses the phase difference characteristics due to the heat of the heat-absorbed ink by performing the entire surface exposure. Accordingly, the divided wave plate 208 is formed in a predetermined pattern in the region where the heat absorbing ink layer 14 does not exist.

  According to this reference example, the heat absorbing ink layer 14 is formed in a predetermined pattern on the divided wavelength plate material layer 3, and this is subjected to exposure treatment, whereby the position of the material layer 3 under the heat absorbing ink layer 14 is selectively selected. The phase difference characteristic is lost, and the region where the heat absorbing ink layer 14 does not exist is formed as the divided wavelength plate 208. Accordingly, the divided wavelength that can be accurately arranged every other line corresponding to the pixel pitch line. It is possible to provide a method of manufacturing a divided wave plate filter that can form a plate filter with high accuracy, is mass-productive, and can satisfy the requirements for the divided wave plate filter of a stereoscopic image display device.

[Reference Example 6]
FIG. 14 shows that the divided wavelength plate material layer 3 is formed into a divided pattern corresponding to the predetermined pattern by laser irradiation of a predetermined pattern, (a) is a schematic perspective view, and (b) is the essential after laser irradiation. (C) is an enlarged cross-sectional view of the main part in a state where the phase difference characteristic has disappeared due to laser heat.

  That is, as shown in FIG. 14A, after the divided wavelength plate material 3 is formed on the entire surface of the substrate 209, the laser oscillator (not shown) is programmed into a predetermined pattern so that the laser oscillator can be divided into the divided wavelength plates. Can be scanned in the line direction L, and ablated by this laser irradiation 30 to selectively remove the divided wave plate material layer 3 and form a divided wave plate with a predetermined pattern with high accuracy as designed. As a result, it is possible to arrange every other line so as to correspond to the pixel pitch line of the pixel liquid crystal unit 205 shown in FIG. 19, and it is possible to further increase the mass productivity.

  As the divided wavelength plate material layer 3, for example, a film having a phase difference characteristic and a material having a laser absorption property are used. Alternatively, for example, laser absorbing titanium oxide 18 or the like may be provided on the entire surface of the divided wavelength plate material layer 3 (see FIG. 14C). However, when providing the titanium oxide 18, it is preferable to irradiate with the laser of the wavelength which is easy to permeate | transmit the titanium oxide 18. FIG.

  By this laser irradiation 30, as shown in FIG. 14B, the divided wavelength plate material layer 3 in the laser-scanned region is ablated to form the removal portion 4, and the divided wavelength plate material in the region that remains without being removed. The layer can be formed as a divided wave plate 208 in a predetermined pattern with high efficiency. Finally, the entire surface is covered with a protective film 6 so that the removal portion 4 is also flat.

  Further, by adjusting the voltage in the laser oscillator, as shown in FIG. 14B, the phase difference characteristic of the divided wavelength plate material layer 3 in the irradiation region is lost and not removed by the laser irradiation 30 with low heat. It is also possible to leave the characteristic disappearing portion 3b as it is, and to cover the whole with the protective film 6 finally with the characteristic disappearing portion 3b remaining between the divided wavelength plates 208.

  According to this reference example, the divided wavelength plate material layer 3 having good laser absorption formed on the entire surface of the substrate 209 is selectively irradiated with laser 30 to remove the divided wavelength plate material layer 3 in a predetermined pattern. Therefore, the divided wave plate 208 can be formed with high accuracy and is mass-productive. The requirement for the divided wave plate filter of the stereoscopic image display device (that is, every other line corresponding to the pixel pitch line). In addition, it is possible to provide a method of manufacturing a divided wavelength plate filter that can satisfy the accuracy and mass productivity that can be accurately arranged.

[Reference Example 7]
This reference example is a method of dividing the divided wave plate material layer 3 formed on the substrate 209 into a predetermined division pattern by cutting, and specific examples are shown in FIGS.

  First, FIG. 15 shows a specific example of division in Reference Example 1 described above, for example. As shown in FIG. 15, on the substrate 209, for example, an adhesive (or adhesive) 9 is formed in a predetermined division pattern as designed, and then the divided wavelength plate material layer 3 is formed on the entire surface thereof. Then, on this divided wavelength plate material layer 3, the cutters 5 are fixedly arranged in multiple rows along both side lines of the pressure-sensitive adhesive 2, and the substrate 209 is conveyed in the direction of the arrow F, so that the divided wavelength plate is batched. The material layer 3 is cut and wound around a winding device (not shown) while peeling off the peeling portion 3a to be removed.

  By this cutting and removal of the peeling portion 3a, the removal portion 4 is formed at the trace where the peeling portion 3a is peeled off, and the divided wavelength plate 208 is formed in a region that is not removed, and the pixel pitch of the pixel liquid crystal portion 205 shown in FIG. Divided wave plates 208 arranged every other line can be formed so as to correspond to the lines. Accordingly, the divided wavelength plate 208 can be accurately formed in a predetermined pattern on the substrate 209 and can be manufactured with mass productivity.

  FIG. 16 shows a method of transporting the substrate 209 in the direction of arrow F. For example, as shown in FIG. 16, the transport roller 17 may be used, or the transport roller 17 may transport in the direction of the arrow F, for example, on a flat or substantially flat support table. Further, the substrate may be fixed and the cutter 5 may be moved in the direction opposite to the arrow F.

  FIG. 17 shows an example of another cutting method. In this case, the rotary cutters 16 are arranged in multiple rows in the same manner as the cutter of FIG. 15, and the position of the shaft 16a is fixed. In this case as well, as shown in FIG. 15, the peeling portion 3 a that peels after cutting is taken up by a winding device. Further, the conveying method may be performed in the same manner as in the above example, and the rotary cutter 16 may be moved and the substrate 209 may be fixed.

  FIG. 18 is a schematic perspective view of a modified example of cutting and removing described above. That is, as shown in FIG. 18, nozzles 28 for injecting liquid (for example, water) 29 at a high pressure are arranged in multiple rows in a predetermined pattern, and the divided wave plate material layer 3 on the substrate 209 is selectively removed by this injection pressure. May be.

  In this case, the divided wavelength plate material layer 3 may be provided on the pressure-sensitive adhesive (or adhesive) 2 arranged in a predetermined pattern on the substrate 209, and for example, the birefringent liquid crystal polymer or photopolymerizable already described. It may be formed by polymerizing a monomer.

  Further, by using, for example, hot water as the liquid 29 to be jetted at a high pressure, the selective removal capability of the divided wavelength plate material layer 3 can be increased, and the divided wavelength plate material layer 3 is thick (for example, 30 μm, see FIG. 1). In the case where it is formed, it can be suitably used when it is necessary to remove a wide band as in the case of forming a wide removal width (for example, 100 μm).

  According to this reference example, the divided wavelength plate material layer is cut together by the multi-row arrangement cutter 5 (or 6) along the both side lines of the adhesive 2 formed in a predetermined division pattern on the substrate 209. Therefore, the divisional wave plate 208 having a predetermined pattern can be accurately formed as designed, and has mass productivity, so that the requirement for the divisional wave plate filter of the stereoscopic image display device (ie, corresponding to the pixel pitch line). Thus, it is possible to provide a method for manufacturing a divided wave plate filter that can satisfy the accuracy and mass productivity that can be accurately arranged every other line.

  The above-described embodiment can be modified based on the technical idea of the present invention.

  For example, the formation process of the divided wave plate 208 in the embodiment may be appropriate other than that shown in the embodiment, and the material used and the method of orientation treatment may be appropriate as long as the equivalent function can be exhibited.

  Furthermore, the present invention can be applied not only to the above-described stereoscopic image observation using the polarized glasses method but also to general known stereoscopic image observation using parallax or the like using polarized light or the like.

  INDUSTRIAL APPLICABILITY The present invention can provide a divided wavelength plate filter that corresponds to a pixel portion accurately, has excellent pattern accuracy, uniform thickness, in-plane uniformity, high reproducibility and mass productivity, and is suitable for a stereoscopic image display device.

It is a schematic perspective view which shows the formation process of the division | segmentation wavelength plate filter by the reference example 1 of this invention. It is the schematic which shows a printing apparatus equally. It is a schematic sectional drawing which shows the manufacturing process of the division | segmentation wavelength plate filter by the reference example 2 of this invention. It is a figure which shows the concept which performs the orientation process after printing the material layer of a division | segmentation wavelength plate filter similarly. It is a schematic sectional drawing which shows the specific example of formation of a material layer and an orientation process similarly. It is a schematic sectional drawing which shows the specific example of formation of a material layer and an orientation process similarly. It is a schematic sectional drawing which shows the modification of an orientation process equally. It is a schematic sectional drawing which shows the modification of an orientation process equally. It is a schematic sectional drawing which shows the specific example of formation of the material layer by Embodiment 1 of this invention, and an orientation process. It is a schematic sectional drawing which shows the specific example of formation of the material layer by the reference example 3 of this invention, and an orientation process. It is a schematic sectional drawing which shows the specific example of formation of the material layer by Embodiment 2 of this invention, and an orientation process. It is a schematic sectional drawing which shows the example of an alignment process by the reference example 4 of this invention. It is a schematic perspective view which shows the example of an alignment process by the reference example 5 of this invention. It is a schematic perspective view which forms a division | segmentation wavelength plate filter by laser irradiation by the reference example 6 of this invention. It is a schematic perspective view which shows an example of the cutting state of the division | segmentation wavelength plate material layer in the reference example 7 of this invention. It is the schematic which shows an example of a cutting | disconnection state similarly. It is the schematic which shows an example of a cutting | disconnection state similarly. It is a schematic perspective view which shows the modification of a cutting | disconnection same as the above. It is an exploded schematic diagram which shows the structure of the pixel part and division | segmentation wavelength plate filter part of a stereo image display apparatus. It is a perspective view which shows an example of the manufacturing method of the division | segmentation wavelength plate filter by a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Printing material, 2 ... Adhesive (or adhesive material), 3 ... Divided wavelength plate material layer, 4 ... Removal part,
3a ... peeling part, 3b ... characteristic disappearance part, 5, 16 ... cutter, 6 ... protective film,
8 ... alignment film (polyimide), 8a ... rubbing treatment part,
9 ... Birefringent liquid crystal polymer (ink), 9a ... Phase-changed part,
12 ... Photopolymerizable monomer (ink), 14 ... Heat absorbing ink, 15 ... Mask, 16a ... Shaft,
17 ... Conveying roller, 18 ... Titanium oxide, 20 ... Grinder, 21 ... Stand,
22 ... anix roll, 23 ... printing roll, 24 ... doctor blade,
26 ... rubbing roll, 28 ... nozzle, 29 ... liquid, 30 ... laser irradiation,
208: Divided wavelength plate, 209 ... Glass substrate, F ... Arrow, D ... Gap, L ... Line direction

Claims (2)

A method of manufacturing a divided wave plate filter that controls the polarization direction of light obtained from each image region divided in accordance with parallax in an image display unit,
After the alignment film material layer is printed on the entire surface or in a predetermined pattern on the substrate, it is rubbed, and after the photopolymerizable monomer layer to be a divided wavelength plate is printed on the entire alignment film or in a divided pattern, The photopolymerizable monomer layer is exposed to a polymer to be polymerized and oriented.
A method of manufacturing a divided wave plate filter.   The manufacturing method of the division | segmentation wavelength plate filter of Claim 1 which coat | covers the division | segmentation wavelength plate formed in the said division | segmentation pattern with a protective film.

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