JP3342454B2 - Film for forming 3D image display and method for manufacturing 3D image display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film for forming a 3D image display for displaying a 3D image and a method for manufacturing the 3D image display.

[0002]

2. Description of the Related Art Conventionally, for example, US Pat.
D imaging devices have been proposed. This 3D image device is shown in FIG.
As shown in FIG. 5, a film 52 in which right-eye image display portions a and left-eye image display portions b are alternately arranged on the surface of a liquid crystal display member 51 is attached.
When controlling the emission of light to make a predetermined image appear,
The right-eye image display section a causes the right-eye image to appear, and the left-eye image display section b causes the left-eye image to appear. Then, the oscillation direction of the polarized light constituting the right-eye image from the right-eye image display unit a is a polarized light having an angle of 90 ° with respect to the oscillation direction of the polarized light constituting the left-eye image from the left-eye display unit b. (For example, the x component of the right-eye image composed of the two components x and y is similarly
180 ° (π) for the x component of the left-eye image consisting of y
When viewed with polarized glasses comprising a right-eye lens with a polarizing plate that transmits only the right-eye image and a left-eye lens with a polarizing plate that transmits only the left-eye image, since the image is configured to have a phase difference of Thus, the observer can think of a stereoscopic image.

Meanwhile, the film 52 in which the right-eye image display portions a and the left-eye image display portions b are alternately arranged is an iodine treatment as disclosed in FIG. 2 of US Pat. No. 5,327,285. A polarizing film (also called a retardation film or a half-wave plate) using one stretched stretched PVA film (polyvinyl alcohol film) is used.

However, since only one retardation film cannot function as a half-wave plate over a wide range of visible light, the wavelength that can function as a half-wave plate accurately and change the polarization direction can be obtained. There is a problem that it is limited to a narrow range.

More specifically, in such an application, the direction of oscillation of polarized light is generally changed by 90 ° (rotation) using a retardation film having a retardation value of about 275 nm. Although it functions as a half-wave plate for light near 550 nm (green region), it is accurate for light in a short wavelength region (blue region) or a long wavelength region (red region).
It does not function as a two-wavelength plate (the polarization direction does not change in the state of perfect linearly polarized light and becomes elliptically polarized light). Therefore,
When the right-eye image display part a and the left-eye image display part b are formed using one such retardation film, the right-eye image and the left-eye image are all in a linear polarization state, and the respective vibration directions are not orthogonal. Therefore, there is a problem that a double image and a color shift occur, and the display quality as a stereoscopic image is not improved.

The present invention provides a film for forming a 3D image display body in which a right-eye image display section a and a left-eye image display section b are mixed and a good 3D image can be displayed.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

A right-eye image display section a and a left-eye image display section b
And a plurality of retardation films such as a polycarbonate film having a birefringence and a stretched PVA film on a transparent support material 1. 3 ′ is provided so that a laminated retardation film 3 is laminated so that the optical axes thereof intersect each other
Then, a predetermined portion of the laminated retardation film 3 is removed, and the removed portion is filled with an appropriate synthetic resin 6 and set on the right-eye image display section a. The portion other than the video display section a is set to the video display section b for the left eye, and relates to a film for forming a 3D video display body.

A film for forming a 3D image display for displaying a 3D image in which a right-eye image display section a and a left-eye image display section b are mixed, and a plurality of films are formed on a transparent support member 1. Polycarbonate film with refractive index and stretched PV
A laminated retardation film 3 in which a plurality of retardation films 3 ′ such as A film are laminated so that their optical axes cross each other.
Is provided, a predetermined portion of the laminated retardation film 3 is removed, and the removed portion is filled with an appropriate synthetic resin 6 and set on the left-eye image display portion b. The portion other than the left-eye video display section b is set in the right-eye video display section a.
The present invention relates to a film for forming a D image display.

A method of manufacturing a 3D image display for displaying a 3D image in which a right-eye image display section a and a left-eye image display section b are mixed, wherein the method is transparent and has no birefringence. A laminate in which a plurality of retardation films 3 ′ such as a birefringent polycarbonate film or a stretched PVA film are laminated on the support material 1 such that their optical axes intersect.
The retardation film 3 is provided, and a predetermined portion of the laminated retardation film 3 is removed, and a plurality of concave grooves extending from one side to the other side are formed in the laminated retardation film 3 in parallel. A method of manufacturing a 3D image display body, characterized in that the concave groove is filled with an appropriate synthetic resin 6, and subsequently, the display member 5 is overlapped or bonded to the laminated retardation film 3 filled with the synthetic resin 6. It is related to.

[0011]

Since a plurality of retardation films 3 'are provided so that their axes intersect with each other, the oscillation direction of polarized light can be converted (rotated) over a wide wavelength range without destroying the polarization state.得 る wavelength plate (laminated retardation film 3) can be obtained.

Thus, by using the laminated retardation film 3, the oscillation direction of the polarized light of the right-eye image from the right-eye image display unit a and the polarization direction of the left-eye image from the left-eye image display unit b can be linearly polarized in a wide wavelength range. It is possible to intersect at 90 ° in the state, and therefore, when viewed by an observer using dedicated polarizing glasses, it is possible to obtain an image in which double images and color shifts are eliminated and an extremely three-dimensional effect can be felt. Become.

[0013]

FIG. 2 illustrates an embodiment of the present invention, which will be described in detail below.

A transparent support material 1 (for example, a glass plate having a thickness of about 1 mm or cellulose acetate butyrate (CAB)
The adhesive 2 (for example, a plurality of sheets of the retardation film 3 through a UV-curable resin) 'crossed the optical axis to each other on a plate or the like) are sequentially laminated by an adhesive 4 (e.g., ultraviolet curable resin), ultraviolet Cures the ultraviolet curable resin.
The support 1 is most preferably a glass plate having no birefringence. The adhesives 2 and 4 used may be any as long as they are transparent and can fix each layer.

The retardation film 3 'is a known retardation plate and rotates the vibration direction of light in a specific wavelength range in a linearly polarized state (9 when the optical axis and the vibration direction are set to 45 °).
For example, it is a polycarbonate film having birefringence that can be rotated by 0 °. In addition, a uniaxially stretched PVA film (about 70 μm in thickness) having similar properties may be used instead of the polycarbonate film.

The crossing angle of the plurality of retardation films 3 ′ is, for example, the number of layers N and the angle of the outgoing linear polarization direction (θ) after transmission through the wavelength film with reference to the incident linear polarization direction (0 °). θ, the angle θk of each half-wave film is θk = (2K−1) · θ / 2N (where K
Is an integer value of 1 to N). Therefore, the intersection angle of the retardation film 3 'is appropriately determined from this equation.

This embodiment is a laminated retardation film 3 in which three polycarbonate films having a retardation value of 230 nm at a measurement wavelength of 550 nm are laminated, and the crossing angle of each retardation film 3 ′ is set at 15 ° from the incident side.
, 45 °, and 75 ° (determined from the above equation), and the characteristics of the laminated retardation film 3 are as shown in FIG. That is, it can be confirmed that the laminated retardation film 3 according to this example has a polarization rotation performance of 90 ° in a wide band of the visible light region as is clear from FIG.

Subsequently, a predetermined portion (three-layered retardation film 3 ') of the laminated retardation film 3 is put on a carbide blade (saw blade).
Then, a plurality of parallel grooves extending from one side to the other side are formed in parallel on the surface of the laminated retardation film 3. The width of the grooves and the pitch of the grooves match the pixel pitch of the display member 5 (liquid crystal display member) to be combined.

By removing a part of the laminated retardation film 3 in this manner, a part where the property of rotating the polarization oscillation direction by 90 ° is not exhibited is produced.

Subsequently, the concave groove is made of an appropriate synthetic resin 6, for example, colorless and transparent, and is filled with an ultraviolet curable resin having the same refractive index as that of the retardation film 3 '. This portion is referred to as a right-eye image display unit a, for example, and the other portions are referred to as a left-eye image display unit b. The right-eye image display part a and the left-eye image display part b may be reversed by making the part filled with the synthetic resin 6 a left-eye image display part b.

Although fine concaves and convexes are formed on the inner surface of the concave grooves by cutting and removing with a carbide blade or the like, the fine concaves and convexes are filled and the surface becomes flat by filling the concave grooves with a resin. Optical characteristics are improved. It has been confirmed that when the groove is filled with resin, the haze (degree of cloudiness) is extremely reduced as compared with the case where the groove is not filled.

Subsequently, the display member 5 (liquid crystal display member) is overlaid with a magnet or the like or bonded with an appropriate adhesive to form a 3D image display.

A film in which the right-eye image display portion a and the left-eye image display portion b obtained by the above-described manufacturing method are arranged side by side can obtain a 3D image display body capable of displaying a good 3D image. Will be.

The image from the 3D image display manufactured in this manner is passed through only the right-eye image from the right-eye image display unit a, and the right-eye lens with a polarizing plate and the left-eye image from the left-eye image display unit b. When viewed with polarized glasses including a left-eye lens with a polarizing plate that transmits only the light that vibrates in a direction orthogonal to the light by 90 ° with respect to the vibration direction of the light that composes the right-eye image, the observer sees the image. Can be considered as a stereoscopic image.

In this embodiment, as described above, since the laminated retardation film 3 in which a plurality of retardation films 3 'are laminated so that their optical axes intersect is used, the light oscillation direction is 90 ° over a wide wavelength range. It can be rotated with that Do. That is, it is possible to rotate all of R (red), G (green), and B (blue) by 90 degrees without destroying the polarization state to almost the same degree (according to the above-described embodiment, the characteristics shown in FIG. 3 can be obtained). Therefore, the vibration directions of the light of the right-eye image from the right-eye image display a and the light of the left-eye image from the left-eye image display b are orthogonal to each other by 90 ° as much as possible. A high-quality 3D image display body in which color shift has been eliminated can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conventional 3D video device.

FIG. 2 is an explanatory diagram of a configuration of the present embodiment.

FIG. 3 is a graph showing characteristics of the laminated retardation film of the present example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support material 2 Adhesive 3 Laminated retardation film 3 'Retardation film 4 Adhesive 5 Display member 6 Synthetic resin a Right-eye image display part b Left-eye image display part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-95176 (JP, A) JP-A-63-14105 (JP, A) JP-A-11-23839 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G03B 35/00-35/26

Claims (3)

(57) [Claims] 1. A film for forming a 3D image display body for displaying a 3D image in which a right-eye image display section and a left-eye image display section are mixed, wherein a birefringence is formed on a transparent support material. A laminated retardation film is provided in which a plurality of retardation films such as a polycarbonate film or a stretched PVA film are laminated such that their optical axes cross each other.
A predetermined portion of the laminated retardation film is removed, the removed portion is filled with an appropriate synthetic resin and set in a right-eye image display portion, and a portion other than the right-eye image display portion of the laminated retardation film is set. A film for forming a 3D image display, which is set in a left-eye image display unit. 2. A film for forming a 3D image display body for displaying a 3D image in which a right-eye image display unit and a left-eye image display unit are mixed, wherein a birefringence is formed on a transparent support material. A laminated retardation film is provided in which a plurality of retardation films such as a polycarbonate film or a stretched PVA film are laminated such that their optical axes cross each other.
A predetermined portion of the laminated retardation film is removed, and the removed portion is filled with an appropriate synthetic resin to be set in the left-eye image display portion, and a portion of the laminated retardation film other than the left-eye image display portion. A film for forming a 3D image display, wherein the film is set in the image display unit for the right eye. 3. A method for producing a 3D image display for displaying a 3D image in which a right-eye image display section and a left-eye image display section are mixed, wherein the support member is transparent and has no birefringence. A laminated retardation film on which a plurality of retardation films such as a birefringent polycarbonate film and a stretched PVA film are laminated such that their optical axes cross each other.
Then, a predetermined portion of the laminated retardation film is removed, and a plurality of grooves extending from one side to the other side are juxtaposed on the laminated retardation film, and an appropriate combination is formed on the concave grooves. A method for manufacturing a 3D image display, comprising: filling a resin; and then superimposing or attaching a display member to the laminated retardation film filled with the synthetic resin.