KR100721234B1 - Film for forming a 3? image display member and manufacturing method for a 3? image display member - Google Patents

Abstract

An object of the present invention is to obtain a film for forming a 3D image display body which can obtain a 3D image having a higher display quality and a three-dimensional effect.

A film for forming a 3D image display body for displaying a 3D image in which a right eye image display unit (a) and a left eye image display unit (b) are mixed. A polycarbonate film having birefringence on a transparent support material (1) A plurality of retardation films 3 'such as a stretched PVA film are set so that the optical axes of each other cross each other, and the laminated retardation film 3 is removed with a predetermined portion, and an appropriate synthetic resin 6 is filled in this removal portion. The right eye image display portion a is set, and the portion of the laminated phase difference film 3 other than the right eye image display portion a is set to the left eye image display portion b.

Description

Film for forming a 3D image display member and a manufacturing method for a 3D image display member {Film for forming a 3D image display member and manufacturing method for a 3D image display member}             

1 is an explanatory diagram of a conventional 3D imaging apparatus;

2 is a configuration explanatory diagram of this embodiment;

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

<Description of the symbols for the main parts of the drawings>

1: support material 2,4: adhesive

3: laminated retardation film 3 ': retardation film

5: display member 6: synthetic resin

a: Image display unit for right eye b: Image display unit for left eye

The present invention relates to a film for forming a 3D image display body for displaying a 3D image and a method of manufacturing the 3D image display body.

Conventionally, a 3D imaging apparatus as shown, for example, in US Pat. No. 5,327,285 has been proposed. As shown in Fig. 1, the 3D imaging apparatus is a film 52 having a right eye image display unit a and a left eye image display unit b alternately arranged on the surface of the liquid crystal display member 51. When the predetermined image is displayed by controlling the light emission of the liquid crystal display member 51, the image for the right eye is displayed in the right eye image display unit a, and the image for the left eye is displayed in the left eye image display unit b. . In addition, the vibration direction of the polarization constituting the right eye image in the right eye image display unit (a) is such that the polarization has a 90 ° angle with respect to the vibration direction of the polarization constituting the left eye image from the left eye display unit (b). [The x component of the right eye image composed of the two components x and y is similarly configured to have a phase difference of 180 ° (π) with respect to the x component of the left eye image composed of the two components x and y. ], A polarized eyeglass comprising a right eye lens with a polarizing plate that transmits only an image for a right eye and a left eye lens with a polarizing plate that transmits only an image for a left eye, the viewer can observe a stereoscopic image.

By the way, the film 52 in which the right eye image display unit a and the left eye image display unit b are alternately arranged is, as disclosed in FIG. 2 of US Pat. No. 5,327,285 so far, a stretched PVA film subjected to oxo treatment. A polarizing film (referred to as a phase difference film and a half wave plate) using one sheet of (polyvinyl alcohol film) is used.

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

Specifically, in such applications, a phase difference film with a phase difference value of about 275 nm is generally used to convert (rotate) the polarization oscillation direction by 90 °, but in this case, the wavelength of light is around 550 nm (green area). Function as a half-wave plate, but does not function as an accurate half-wave plate for light in a short wavelength region (blue region) or a long wavelength region (red region) (the polarization direction does not change in a state of complete linear polarization). , Elliptical polarization). Therefore, when the right eye image display unit (a) and the left eye image display unit (b) are formed using one sheet of retardation film, the vibration directions of the right eye image and the left eye image are not orthogonal to each other in a linearly polarized state. Therefore, there arises a problem that double image and color misalignment occur and the display quality as a three-dimensional image does not improve.

The present invention provides a film for forming a 3D image display body in which a right eye image display unit (a) and a left eye image display unit (b) are mixed and can display a good 3D image.

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

A film for forming a 3D image display body for displaying a 3D image in which a right eye image display unit (a) and a left eye image display unit (b) are mixed, and a polycarbonate film having birefringence on a transparent support material (1) A laminated retardation film 3 in which a plurality of retardation films 3 'such as a stretched PVA film are laminated so that optical axes intersect with each other is provided, and a predetermined portion of the laminated retardation film 3 is removed. An appropriate synthetic resin 6 is filled to set the right eye image display unit a, and other portions of the laminated phase difference film 3 other than the right eye image display unit a are set to the left eye image display unit b. It is related with the film for formation of a 3D video display body characterized by the above-mentioned.

Further, a film for forming a 3D image display body for displaying a 3D image in which a right eye image display unit (a) and a left eye image display unit (b) are mixed, a polycarbonate having birefringence on a transparent support material (1) The laminated retardation film 3 in which a plurality of retardation films 3 'such as a film and a stretched PVA film are laminated so that the optical axes of each other intersect is set, and a predetermined portion of the laminated retardation film 3 is removed. The removed portion is filled with a suitable synthetic resin 6 to be set as the left eye image display portion b, and the portion other than the left eye image display portion b of the laminated phase difference film 3 is the right eye image display portion a. It relates to a film for forming a 3D image display body, characterized in that it is set to ().

Further, a method of manufacturing a 3D image display body for displaying a 3D image in which a right eye image display unit (a) and a left eye image display unit (b) are mixed, on a support material (1) that is transparent and does not have birefringence. Laminated retardation film (3) is provided by stacking a plurality of retardation films (3 '), such as a birefringent polycarbonate film and a stretched PVA film, so that their optical axes intersect, and then the laminated retardation film (3). ), A plurality of concave grooves are formed on the laminated retardation film 3 extending from one side to the other side and filled with the appropriate synthetic resin 6 in the concave groove. A method for producing a 3D video display body, characterized in that the display member 5 is polymerized or pasted onto a laminated retardation film 3 filled with a synthetic resin 6.

[Operation and Effects of the Invention]

Since the plurality of retardation films 3 'are installed in a state where the cross axes of each other cross, 1/2 that can convert (rotate) the polarization vibration direction over a wide wavelength range without breaking the polarization state A wave plate (laminated phase difference film 3) can be obtained.

Therefore, by using the laminated retardation film 3, the polarization vibration direction of the right eye image from the right eye image display unit (a) and the left eye image from the left eye image display unit (b) is linearly polarized in a wide wavelength range. As it is possible to intersect at 90 °, therefore, when an observer is observed using a dedicated polarized glasses, the double image and color misalignment can be eliminated to obtain an image that can feel an extremely three-dimensional feeling.

[Embodiment of the Invention]

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

A plurality of retardation films 3 'are attached to the transparent support material 1 (e.g., a glass plate or a cellulose acetate butyrate (CAB) plate having a thickness of about 1 mm) through an adhesive 2 (e.g., an ultraviolet curable resin). The optical axes cross each other and are sequentially laminated with an adhesive 4 (for example, an ultraviolet curable resin), and the ultraviolet curable resin is cured by ultraviolet rays. On the other hand, the support material 1 is most preferably a glass plate having no birefringence. In addition, the adhesive agents 2 and 4 to be used should just be transparent and can fix each layer.                     

The retardation film 3 'is, for example, birefringent which can rotate the vibration direction of light in a specific wavelength region in a linearly polarized state (90 ° when the optical axis and the vibration direction are set to 45 °) in a known retardation plate. It is a polycarbonate film having sex. In addition, you may use uniaxially-stretched PVA film (about 70 micrometers in thickness) which has the same property instead of a polycarbonate film.

Incidentally, the crossing angles of the plurality of retardation films 3 'are, for example, the number of laminated sheets N and the incident linearly polarized light direction as reference (0 °). In one case, the angle θ k of each half-wave film is determined by θ k = (2K-1) · θ / 2N (only K is an integer value of 1 to N). Therefore, the crossing angle of the suitable retardation film 3 'is determined from this formula.

This embodiment is a laminated retardation film 3 in which three polycarbonate films having a retardation value of 230 nm are laminated at a measurement wavelength of 550 nm, and the crossing angles of the retardation films 3 'are respectively determined from the incident side. 15 degrees, 45 degrees, and 75 degrees (required by said formula) are laminated | stacked, and the characteristic of this lamination phase difference film 3 is the same as that of FIG. That is, it can be confirmed that the laminated retardation film 3 according to this embodiment has a polarization rotation performance of 90 ° in the wide band of the visible light region, as is apparent from FIG. 3.

Subsequently, a predetermined portion (three layers of retardation film 3 ') of the laminated retardation film 3 is cut off by a cemented carbide blade (saw blade) or the like to extend from one side to the other on the surface of the laminated retardation film 3. A plurality of parallel concave grooves are formed in parallel. The concave grooves are adapted to the pixel pitches of the display member 5 (liquid crystal display member) in which the width and pitch of the concave grooves are combined.

By removing a part of the laminated retardation film 3 in this way, the part which does not exhibit the property to rotate the vibration direction of polarization 90 degrees is produced.

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

Although fine concavities and convexities are formed on the inner surface of the concave grooves by cutting with a carbide blade or the like, by filling the concave grooves with resin, the fine concavities and convexities are filled and the surface becomes flat, thereby improving the optical characteristics. It can be seen that the haze (degree of roughness) decreases extremely compared with the fact that this recessed groove was not filled with resin.

Subsequently, the display member 5 (liquid crystal display member) is polymerized with a magnet or the like or glued together with an appropriate adhesive to form a 3D video display.

The film provided with the right eye image display unit (a) and the left eye image display unit (b) obtained by the above manufacturing method can obtain a 3D image display body capable of displaying a good 3D image.

The left eye image (right eye image in the left eye image display part (b) and the right eye lens with polarizing plate which transmits only the right eye image in the right eye image display part (a) to the image from the 3D image display body manufactured in this way) When viewed with a polarized glasses composed of a left-eye lens with a polarizing plate that transmits only an image composed of light vibrating in a direction perpendicular to the vibrational direction of light constituting the light, the observer can think of the image as a stereoscopic image. do.

Since the present embodiment uses a laminated phase difference film 3 in which a plurality of retardation films 3 'are laminated so that their optical axes intersect as described above, the vibration direction of light is rotated 90 ° over a wide wavelength range. It becomes possible. That is, it becomes possible to rotate R (red), G (green), and B (blue) all by 90 degrees without destroying the polarization state to about the same degree (since the characteristics of FIG. 3 can be obtained according to the embodiment). Therefore, the vibration direction of the light of the right eye image in the right eye image display body (a) and the left eye image in the left eye image display body (b) is preferably 90 ° orthogonal to each other. It is possible to obtain a high quality 3D image display body solved.

Claims (3)

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, and a plurality of phase difference films such as a polycarbonate film or a stretched PVA film having birefringence on a transparent support material The laminated retardation film laminated so as to cross each other's optical axis is provided, and the laminated retardation film is removed to form parallel concave grooves extending from one side to the other side, and the removal portion is a synthetic resin having the same refractive index as the retardation film. Is filled into the right eye image display unit, and a portion other than the right eye image display unit of the laminated retardation film is set as the left eye image display unit. 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. A plurality of retardation films, such as a polycarbonate film or a stretched PVA film, having birefringence on a transparent support material The laminated retardation film laminated so as to cross each other's optical axis is provided, and the laminated retardation film is removed to form parallel concave grooves extending from one side to the other side, and the removal portion is a synthetic resin having the same refractive index as the retardation film. Is filled into the left eye image display unit, and the part of the laminated phase difference film other than the left eye image display unit is set as the right eye image display unit. It is a manufacturing method of 3D image display body for displaying 3D image mixed with right eye image display unit and left eye image display unit, and it is transparent and birefringent polycarbonate film or stretched PVA film on support material which does not have birefringence. A plurality of retardation films of a plurality of retardation films are laminated so that their optical axes intersect with each other, and then the laminated retardation films are removed so as to form parallel concave grooves extending from one side to the other side, thereby forming the laminated retardation film. The concave grooves are provided with a plurality of concave grooves extending from one side to the other side, and the concave grooves are filled with a synthetic resin having the same refractive index as that of the retardation film. A method of manufacturing a 3D video display body, characterized in that the polymerization or bonding to each other.

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