Three-dimensional image display apparatus
It is aimed to reduce the occurrence of crosstalk attributable to the thermal expansion/contraction of a retarder and an image display section, and the unevenness in color attributable to the uneven surfaces of the retarder and the image display section. It is also aimed to reduce the misalignment of the retarder with respect to the image display section. The exit surface of an image display section 130 and the entrance surface of a retarder 180 are adhered to each other by using an adhesion layer 300 . Additionally, the left and right edges of the image display section 130 are adhered to the left and right edges of the retarder 180 by using adhesion regions 400 . Here, the adhesion regions 400 have a higher glass transition temperature than the adhesion layer 300.
1. A three-dimensional image display apparatus comprising:
an image display section that includes an image generating section constituted by a right eye image generating region for generating right eye image light and a left eye image generating region for generating left eye image light, the image display section emitting (i) the right eye image light as linearly polarized light whose polarization axis extends in a given direction and (ii) the left eye image light as linearly polarized light whose polarization axis extends in a direction parallel to the given direction;
a retarder that is positioned in front of the image display section in a light proceeding direction, the retarder including a right eye polarization region and a left eye polarization region;
an adhesion layer that adheres together an exit surface of the image display section and an entrance surface of the retarder, the adhesion layer being provided in a region in which the right eye polarization region and the left eye polarization region of the retarder overlap the right eye image generating region and the left eye image generating region of the image display section; and
an adhesion region that adheres together a periphery portion of the image display section and a periphery portion of the retarder, wherein
when the right eye image light and the left eye image light emitted from the image display section are respectively incident on the right eye polarization region and the left eye polarization region of the retarder, the retarder (I) emits the right eye image light as linearly polarized light whose polarization axis extends in a certain direction and emits the left eye image light as linearly polarized light whose polarization axis extends in a direction orthogonal to the certain direction, or (II) emits the right eye image light as circularly polarized light whose polarization axis rotates in one direction and emits the left eye image light as circularly polarized light whose polarization axis rotates in an opposite direction,
a glass transition temperature of an adhesive forming the adhesion region is higher than a glass transition temperature of an adhesive forming the adhesion layer, and
the glass transition temperature of the adhesive forming the adhesion region is 80° C. or higher, and the glass transition temperature of the adhesive forming the adhesion layer is 0° C. or lower.
2. The three-dimensional image display apparatus as set forth in claim 1 , wherein
a plurality of adhesion regions are provided along an edge of the retarder, and are spaced away from each other.
3. The three-dimensional image display apparatus as set forth in claim 2 , wherein
the plurality of adhesion regions adhere a side surface of the retarder and the image display section to each other.
4. The three-dimensional image display apparatus as set forth in claim 3 , wherein
the image display section includes a glass substrate and a polarization plate that is attached to a surface of the glass substrate which is closer to the retarder, and
the plurality of adhesion regions adhere the glass substrate and the retarder to each other.
5. The three-dimensional image display apparatus as set forth in claim 4 , wherein the plurality of adhesion regions are spaced away from the polarization plate.
6. The three-dimensional image display apparatus as set forth in claim 4 , wherein
the retarder includes a glass substrate that supports the right eye polarization region and the left eye polarization region, and
the plurality of adhesion regions adhere, at least, a pair of opposing edges of the glass substrate in the retarder, to the glass substrate in the image display section.
7. A three-dimensional image display apparatus comprising:
an image display section that includes an image generating section constituted by a right eye image generating region for generating right eye image light and a left eye image generating region for generating left eye image light, the image display section emitting (i) the right eye image light as linearly polarized light whose polarization axis extends in a given direction and (ii) the left eye image light as linearly polarized light whose polarization axis extends in a direction parallel to the given direction;
a retarder that is positioned in front of the image display section in a light proceeding direction, the retarder including a right eye polarization region and a left eye polarization region;
an adhesion layer that adheres together an exit surface of the image display section and an entrance surface of the retarder, the adhesion layer being provided in a region in which the right eye polarization region and the left eye polarization region of the retarder overlap the right eye image generating region and the left eye image generating region of the image display section; and
an adhesion region that adheres together a periphery portion of the image display section and a periphery portion of the retarder, wherein
when the right eye image light and the left eye image light emitted from the image display section are respectively incident on the right eye polarization region and the left eye polarization region of the retarder, the retarder (I) emits the right eye image light as linearly polarized light whose polarization axis extends in a certain direction and emits the left eye image light as linearly polarized light whose polarization axis extends in a direction orthogonal to the certain direction, or (II) emits the right eye image light as circularly polarized light whose polarization axis rotates in one direction and emits the left eye image light as circularly polarized light whose polarization axis rotates in an opposite direction,
a glass transition temperature of an adhesive forming the adhesion region is higher than a glass transition temperature of an adhesive forming the adhesion layer, and
the glass transition temperature of the adhesive forming the adhesion layer is −20° C.
8. The three-dimensional image display apparatus as set forth in claim 7 , wherein
a plurality of adhesion regions are provided along an edge of the retarder, and are spaced away from each other.
9. The three-dimensional image display apparatus as set forth in claim 8 , wherein
the plurality of adhesion regions adhere a side surface of the retarder and the image display section to each other.
10. The three-dimensional image display apparatus as set forth in claim 9 , wherein
the image display section includes a glass substrate and a polarization plate that is attached to a surface of the glass substrate which is closer to the retarder, and
the plurality of adhesion regions adhere the glass substrate and the retarder to each other.
11. The three-dimensional image display apparatus as set forth in claim 10 , wherein the plurality of adhesion regions are spaced away from the polarization plate.
12. The three-dimensional image display apparatus as set forth in claim 10 , wherein
the retarder includes a glass substrate that supports the right eye polarization region and the left eye polarization region, and
the plurality of adhesion regions adhere, at least, a pair of opposing edges of the glass substrate in the retarder, to the glass substrate in the image display section.