TWI452325B - 3D glasses with phase difference film, 3D glasses with optical film and 3D glasses - Google Patents

Description

Phase difference film for 3D glasses, optical sheets for 3D glasses, and 3D glasses

The present invention relates to a retardation film for 3D glasses, an optical sheet for 3D glasses using the same, and 3D glasses using the same.

In recent years, when viewing image light emitted from a 3D (three-dimensional) stereoscopic image display device, a person who is watching wears 3D glasses. The 3D stereoscopic image display device emits a right-eye image light and a left-eye image light having parallax, and is designed to be viewed by a person who views the right-eye lens and the left-eye lens with different optical properties. The viewer who views this can recognize the 3D stereoscopic image (for example, refer to Japanese Laid-Open Patent Publication No. 2011-48236).

Specifically, the right-eye image light and the left-eye image light emitted from the 3D stereoscopic image display device are emitted as circularly polarized light having different rotation directions. The 3D glasses have a quarter-wave plate (wavelength plate) on the side of the 3D stereoscopic image display device. The right-eye image light and the left-eye image light, which are circularly polarized, are converted into linear polarized light and transmitted through the quarter-wave plate. Wherein, since the right-eye image light and the left-eye image light are circularly polarized lights having different rotation directions, the right-handed image light is converted to be inclined to the right-hand side by 45° with respect to the fast axis of the 1/4 wave plate. The linear polarized light in the direction and the left-turned image light are converted into linear polarized light inclined by 45° to the left-hand side.

Further, the 3D glasses have a polarizing plate on the side of the person watching. The polarizing plate is disposed in each lens such that the transmission axis direction is inclined in one direction (for example, the right-hand direction) with respect to the fast axis direction of the quarter-wave plate in one lens, and the transmission axis direction is opposite to 1 in the other lens. /4 wave plate fast axis direction to another Tilt in one direction (left-hand direction). Therefore, as described above, in the linearly polarized light converted by the quarter-wave plate, in one lens, the linearly polarized light converted into the left-handed image light does not pass, and only the linearly polarized light converted into the right-handed image light passes. On the other hand, in the other lens, the linearly polarized light converted by the right-handed image light does not pass, and only the linearly polarized light converted by the left-handed image light passes. Thereby, the wearer can separately view the image based on the right-eye image light and the image based on the left-eye image light with the right eye and the left eye, and the viewer can recognize the 3D stereoscopic image.

It is known that as a quarter-wave plate of a lens for the 3D glasses, an optical sheet obtained by forming a sheet using polycarbonate as a main polymer and extending the sheet is used.

However, in the case of a sheet made of polycarbonate, if thermoforming or the like is performed, since the birefringence changes, the lens of the 3D glasses using the optical sheet must have a planar shape. That is, in consideration of designability and the like, for example, if the lens of the 3D glasses has a three-dimensional curved surface, the birefringence of the retardation film of the lens changes when the curved shape is formed, and as a result, the desired image light cannot be obtained. Through the lens, the problem that the person who is watching cannot recognize the 3D stereoscopic image.

Patent Document 1: Japanese Patent Laid-Open Publication No. 2011-48236.

In view of the above problems, it is an object of the present invention to provide a retardation film for 3D glasses which can obtain a desired birefringence even when formed into a curved shape or the like, an optical sheet for 3D glasses using the same, and a 3D using the same. glasses.

In order to solve the problems, the present invention provides a retardation film for 3D glasses, which comprises, as a host polymer, a cyclic olefin copolymer or a cyclic olefin polymerization. The object has birefringence in the plane direction.

Since the host polymer of the retardation film for 3D glasses is a cycloolefin copolymer or a cycloolefin polymer, in order to form a curved shape or the like for thermoforming or the like, even if the amount and stress are heated on the retardation film for 3D glasses, Refraction is also hard to change. That is, since the cyclic olefin copolymer or the cycloolefin polymer has a small change in phase difference due to heat and stress, it is easy to maintain birefringence even in thermoforming or the like. Therefore, for example, even if the lens for the eyeglasses is formed into a curved shape or the like, the lens can have a desired birefringence.

Further, it is preferable that the retardation film for the 3D glasses is formed by uniaxial stretching. Thereby, the 3D glasses are subjected to uniaxial stretching using a retardation film to impart desired birefringence.

Further, it is preferable that the retardation film for the 3D glasses is a quarter-wave plate. Thus, the phase difference film for 3D glasses can convert circularly polarized light into linearly polarized light, and thus can be suitably used for, for example, a lens for 3D glasses.

Further, in order to solve the above-described problems, the present invention provides an optical sheet for 3D glasses, comprising the retardation film for 3D glasses as described above and a polarizing plate laminated on the retardation film for 3D glasses.

The optical sheet for 3D glasses can be suitably used as a lens of 3D glasses, and it is difficult to change birefringence even when a curved shape or the like is formed by thermoforming or the like. Therefore, even if it is formed into a curved shape or the like, it can be made to have a shape. The desired birefringent optical sheet allows the desired light to be transmitted through the lens.

Further, it is preferable that the optical sheet for 3D glasses has a structure that is curved in a three-dimensional manner, and therefore can be a product excellent in design, and can have a desired light by having a desired birefringence as described above. through Therefore, it is suitable for lenses for 3D glasses.

Further, it is preferable that the fast axis direction of the 3D glasses retardation film of the 3D glasses optical sheet and the transmission axis direction of the polarizing plate are disposed at an angle of about 45°.

According to the optical sheet for 3D glasses having the above configuration, when the circularly polarized light is incident on the retardation film for 3D glasses, the circularly polarized light is converted into linearly polarized light and transmitted through the retardation film for 3D glasses. The polarization direction (vibration direction) of the transmitted linearly polarized light is determined by the rotational direction of the circularly polarized light and the fast axis direction of the retardation film for 3D glasses. Specifically, when the circularly polarized light is right-handed when viewed from the traveling direction of the light, the polarization direction of the transmitted linearly polarized light is turned rightward from the direction of the light traveling direction with respect to the fast axis direction of the retardation film for 3D glasses. The side is inclined by 45°. On the other hand, when the circularly polarized light is left-handed when viewed from the traveling direction of the light, the polarization direction of the transmitted linearly polarized light is inclined to the left-hand side with respect to the fast-axis direction of the retardation film for 3D glasses as seen from the traveling direction of the light. 45° direction. Therefore, as described above, by arranging the fast axis direction and the transmission axis direction at an angle of about 45°, the polarizing plate converts only the circularly polarized light of one rotational direction into a linearly polarized light (transmission axis direction and polarization). The linearly polarized light having the same direction is transmitted, and the linearly polarized light (the linearly polarized light in the polarizing direction perpendicular to the transmission axis direction) converted by the circularly polarized light in the other rotational direction is not transmitted. Thus, the optical sheet for 3D glasses having the above configuration can be suitably used as a lens of 3D glasses.

Further, in order to solve the above problems, the present invention also provides a 3D glasses including a right-eye lens and a left-eye lens each including the optical sheet for 3D glasses as described above, the right-eye lens and the The direction of the fast axis of the retardation film of the 3D glasses of one lens of the left-eye lens is about 45° with the transmission axis direction of the polarizing plate of the one lens on one side in one direction. Configuration, the right-axis direction of the 3D glasses for the other of the right-eye lens and the left-eye lens, and the polarizing plate of the other lens on one side in the other direction The transmission axis direction is arranged at an angle of about 45°.

Since the host polymer of the retardation film for 3D glasses of the lens of the 3D glasses is a cycloolefin copolymer or a cycloolefin polymer, the lens is subjected to thermoforming or the like for forming a curved shape or the like, and the phase difference is used for the 3D glasses. It is also difficult to change the birefringence by the amount of film heating and stress. Further, since the direction of the fast axis of one lens is arranged at an angle of about 45 with the direction of the transmission axis on one side in one direction, the direction of the fast axis of the other lens is about 45 in the direction of the other direction and the direction of the transmission axis. The angle is arranged in such a way that only one circularly polarized light in one rotational direction is transmitted in one lens, and only circularly polarized light in the other rotational direction is transmitted in the other lens. Therefore, the right-eye image light and the left-eye image light emitted from the stereoscopic image display device can be viewed with the right eye and the left eye, respectively, and the viewer can recognize the 3D stereoscopic image.

As described above, the 3D glasses retardation film of the present invention can easily maintain the birefringence even when the lens is formed into a desired shape such as a curved shape. Therefore, even if it is formed into a curved shape or the like, it can be transmitted. The light that is desired. Therefore, even for the optical sheets for 3D glasses and the 3D glasses, the design can be improved, and the 3D stereoscopic image can be recognized accurately and reliably.

Hereinafter, an embodiment of the present invention will be described by taking 3D glasses 1 as an example.

The 3D glasses 1 includes a frame 2, and a right-eye lens 3 and a left-eye lens 3 attached to the frame 2.

The right-eye lens 3 and the left-eye lens 3 have an optical sheet 10 (an optical sheet for 3D glasses) composed of a sheet laminate, and the right-eye lens 3 and the left-eye lens 3 have a pair of optical sheets 10 The shape of the three-dimensionally curved shape formed by the thermoforming is a shape in which the center side of the lens 3 is curved outward from the center (the side of the stereoscopic image display device).

As shown in FIG. 2, the optical sheet 10 includes a quarter-wave plate 11 (a retardation film for glasses) and a polarizing plate 12, and a quarter-wave plate 11 is laminated on the outer side of the polarizing plate 12. In other words, the 1/4 wave plate 11 is disposed closer to the curved protruding side of the lens 3 than the polarizing plate 12. Further, the 1/4 wave plate 11 and the polarizing plate 12 may be adhered together by various methods, for example, by laminating together by an adhesive or the like. Further, in the case of using an adhesive, it is preferred to use a transparent adhesive. Fig. 2 shows the optical sheet 10 before thermoforming.

The polarizing plate 12 is a sheet-shaped member that is provided to transmit only light in a certain vibration direction. As the polarizing plate 12, various polarizing plates 12 can be used. For example, a polarizing plate mainly composed of polyvinyl alcohol and having an iodine compound molecule adsorbed on the main body can be used, or a polarizing plate having a protective layer or the like provided thereon can be used. board.

The quarter-wave plate 11 is a sheet-shaped member having birefringence in a planar direction, and is formed into a sheet shape by using a cyclic olefin copolymer or a cycloolefin polymer as a host polymer. The quarter-wave plate 11 may be provided with various additive materials depending on the purpose. Further, the quarter-wave plate 11 is formed by uniaxial stretching, thereby imparting birefringence in the planar direction.

Further, the glass transition temperature Tg of the 1/4 wavelength plate 11 is preferably set to 100 ° C or more and 170 ° C or less, more preferably set to 105 ° C or more and 160 ° C. Further, it is more preferably set to be 110 ° C or more and 150 ° C or less. By setting such a glass transition temperature range, thermoforming can be easily and reliably performed, and birefringence can be easily maintained at the time of thermoforming.

The fast axis direction of the quarter-wave plate 11 of the right-eye lens 3 is disposed at an angle of about 45° with respect to the transmission axis direction of the polarizing plate 12 of the right-eye lens 3 on the right-hand side. Further, the fast axis direction of the quarter-wave plate 11 of the left-eye lens 3 is arranged at an angle of about 45° with respect to the transmission axis direction of the polarizing plate 12 of the left-eye lens 3 in the left-hand direction.

More specifically, a specific example will be described. The direction of the transmission axis of the polarizing plate 12 of the right-eye lens 3 and the left-eye lens 3 is arranged in the horizontal direction (the right-eye lens 3 and the left-eye lens 3 are arranged side by side). The direction). The fast axis direction of the quarter-wave plate 11 of the right-eye lens 3 is arranged to be inclined by about 45° with respect to the horizontal direction to the left-hand side, and the fast-axis direction of the quarter-wave plate 11 of the left-eye lens 3 is arranged to be relatively Tilt about 45 to the right-hand side in the horizontal direction.

For the 3D glasses 1 constructed of the above structure, the wearer can recognize the 3D stereoscopic image based on the image light from the 3D stereoscopic image display device. That is, the right-eye image light passes through the right-eye lens 3, but does not pass through the left-eye lens 3; the left-eye image light passes through the left-eye lens 3, but does not pass through the right-eye lens 3.

More specifically, for example, when the right-eye image light is a right-handed circularly polarized light, if the circularly polarized light is transmitted through the quarter-wave plate 11 of the right-eye lens 3, the quarter-wave is The sheet 11 has a fast axis inclined by about 45° with respect to the horizontal direction to the left-hand side, so that the right-handed circularly polarized light is converted into a linearly polarized light whose polarization direction is the horizontal direction. In this case, since the image light for the left eye is left-handed, the circularly polarized light is transmitted through the mirror for the right eye. In the quarter-wave plate 11 of the sheet 3, the left-handed circularly polarized light is converted into a linearly polarized light whose polarization direction is the up-and-down direction (the direction perpendicular to the horizontal direction). Since the transmission axis direction of the polarizing plate 12 is in the horizontal direction, only the linearly polarized light (the polarization direction is the horizontal direction) into which the circularly polarized light of the right-eye image light is converted is transmitted through the polarizing plate 12, and the left-eye image light is used. The linearly polarized light (the polarization direction is the up and down direction) converted by the circularly polarized light is not transmitted through the polarizing plate 12.

Further, in the case of the left-eye lens 3, when the left-eye image light is a left-handed circularly polarized light, if the circularly polarized light is transmitted through the quarter-wave plate 11 of the left-eye lens 3, the quarter-wave is The sheet 11 has a fast axis inclined by about 45° to the right-hand side with respect to the horizontal direction, so that the left-handed circularly polarized light is converted into a linearly polarized light whose polarization direction is a horizontal direction. In this case, since the right-eye image light is right-handed, if the circularly polarized light is transmitted through the quarter-wave plate 11 of the left-eye lens 3, the right-handed circularly polarized light is converted into the polarized direction in the up and down direction. Straight line polarization (direction perpendicular to the direction of the level). Since the transmission axis direction of the polarizing plate 12 is in the horizontal direction, only the linearly polarized light (the polarization direction is a horizontal direction) into which the circularly polarized light of the left-eye image light is converted is transmitted through the polarizing plate 12, and the right-eye image light is rounded. The linearly polarized light (the polarization direction is the up and down direction) converted by the polarized light is not transmitted through the polarizing plate 12.

In this way, since only the linearly polarized light that converts the circularly polarized light of the right-eye image light is transmitted through the right-eye lens 3, only the linearly polarized light that converts the circularly polarized light of the left-eye image light is transmitted through the left-eye lens 3, By wearing the 3D glasses 1 composed of the above structure, it is possible to recognize a 3D stereoscopic image based on the image light from the 3D image display device.

Further, in the 3D glasses 1, since the lens 3 is curved in a three-dimensional manner, it can be a product excellent in design. Therefore, it can be used not only for viewing a 3D image display device, but also for polarizing too for outdoor use, etc. Sun mirror use.

In addition, since the host polymer of the quarter-wave plate 11 is a cycloolefin copolymer or a cycloolefin polymer, even if it is subjected to thermoforming or the like for three-dimensional bending as described above, even the amount of heat is applied to the quarter-wave plate 11 And the stress, the phase difference change due to heat and stress is also small, and it is difficult to change the birefringence of the quarter-wave plate 11. Therefore, desired light as described above can be transmitted through the lens 3.

Further, since the quarter-wave plate 11 is formed by uniaxial stretching, desired birefringence can be obtained easily and reliably.

Further, the above-described embodiment has the above-described configuration and has the above-described advantages, but the present invention is not limited thereto, and the design can be appropriately changed within the scope of the object of the present invention.

In the 3D glasses of the above-described embodiment, the 3D glasses in which the transmission axis direction of the polarizing plate of the right-eye lens and the transmission axis direction of the polarizing plate of the left-eye lens are aligned are described. However, the present invention is not limited to the invention. this. That is, for example, the transmission axis direction of the polarizing plate disposed as the right-eye lens and the transmission axis direction of the polarizing plate of the left-eye lens are perpendicular to each other (for example, one is arranged to be inclined by 45° to the left-hand direction with respect to the horizontal direction, and the other is placed It is arranged to be inclined by 45° in the right-hand direction, and may be arranged such that the fast axis direction of the quarter-wave plate of the right-eye lens coincides with the fast-axis direction of the quarter-wave plate of the left-eye lens, and The direction of each transmission axis is an angle of about 45 (the direction of the fast axis is arranged in the level direction).

Further, although the optical sheet for 3D glasses of the above-described embodiment has a two-layer structure of a polarizing plate and a quarter-wave plate, the optical sheet for 3D glasses of the present invention is not limited thereto. For example, the design may be appropriately changed, and a base material layer may be provided between the polarizing plate and the 1/4 wave plate. Specifically, the polarizing plate layer can be The stack is bonded to one side of the base material layer, and the 1/4 wave plate is laminated and bonded to the other surface. Alternatively, the design may be appropriately changed so that the base material layer is provided on the outer surface of the polarizing plate or the quarter-wave plate.

Further, the design may be appropriately changed. For example, a protective layer or the like may be provided on the outer surface of the polarizing plate and/or the quarter-wave plate. Further, in the case where a layer such as a protective layer is provided on the outer surface of the polarizing plate and/or the quarter-wave plate, a coating layer is preferably used. Further, it is preferred to apply the coating after forming a three-dimensional shape. Thus, the coating has no birefringence and can be suitably used as 3D glasses.

Industrial applicability

As described above, the retardation film for glasses of the present invention, the optical sheet for 3D glasses using the same, and the 3D glasses using the same can be suitably used when viewing a 3D stereoscopic image display device.

1‧‧‧ glasses

2‧‧‧Frame

3‧‧‧Lens

10‧‧‧ optical film

11‧‧‧ Wave Plate

12‧‧‧Polar plate

Fig. 1 is a perspective view schematically showing 3D glasses according to an embodiment of the present invention.

2 is a schematic cross-sectional view of an optical sheet used in the 3D glasses of FIG. 1.

1‧‧‧ glasses

2‧‧‧Frame

3‧‧‧Lens

Claims (6)

A retardation film for 3D glasses, which is thermoformed into a three-dimensionally curved shape, characterized in that the host polymer contains a cyclic olefin copolymer or a cycloolefin polymer so that no change in birefringence occurs during thermoforming; The retardation film for 3D glasses is a quarter-wave plate having birefringence in the planar direction; and the glass transition temperature of the retardation film for 3D glasses is 100° C. or higher and 170° C. or lower. The retardation film for 3D glasses according to claim 1, wherein the retardation film for the 3D glasses is formed by uniaxial stretching. An optical sheet for 3D glasses, comprising the retardation film for 3D glasses of the first aspect of the patent application, and a polarizing plate laminated on the retardation film for the 3D glasses. The optical sheet for 3D glasses according to item 3 of the patent application, wherein the optical sheet for 3D glasses is curved in a three-dimensional manner. The optical sheet for 3D glasses according to claim 3, wherein the fast axis direction of the retardation film for the 3D glasses and the transmission axis direction of the polarizing plate are at an angle of about 45° at an angle of the two. Configuration. A 3D glasses, comprising: a right-eye lens and a left-eye lens each including an optical sheet for 3D glasses according to claim 5 of the patent application, and one of the right-eye lens and the left-eye lens The direction of the fast axis of the retardation film for the 3D glasses of the lens is disposed at an angle of about 45° with respect to the transmission axis direction of the polarizing plate of the one lens in one direction, the right-eye lens and the left eye. The 3D glasses of the other lens in the lens are used in the fast axis direction of the retardation film to the other mirror side in the other direction The sheet of the polarizing plate has a transmission axis direction at an angle of about 45°.