KR20110119244A - A liquid crystal shutter glasses and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A liquid crystal shutter type eyeglass manufacturing method and liquid crystal shutter type eyeglasses are provided to reduce eye fatigue when a user views a 3D image in a 3D imaging system and to make thinner and lighter eyeglasses. CONSTITUTION: A polarizer filter(21) is arranged in the front surface of an image display apparatus(10). A transparent protection film(37), a polarizer(33), and an STN mode liquid crystal panel(31) synchronized in a time-division display surface cycle are laminated. The light projected from the liquid crystal panel passes a polarization film and a liquid crystal coating layer(41). The polarizer is arranged by absorbing iodine in a polyvinyl alcohol film. The transparent protection film is welded in both surfaces of the polarizer.

Description

Liquid Crystal Shutter Glasses and Manufacturing Method Thereof {A LIQUID CRYSTAL SHUTTER GLASSES AND MANUFACTURING METHOD THEREOF}

The present invention relates to a liquid crystal shutter type glasses and a method for manufacturing the same, which can be reduced in weight and thickness while reducing eye fatigue in a stereoscopic image system using a liquid crystal shutter type glasses.

In general, the eyes of a person are about 65 mm apart so that when looking at an object, each eye sees a slightly different side of the object. As a way of recognizing this, there is a slight difference between the shape of an object seen after covering one eye with a palm and the object seen after covering another.

This is called disparity due to the left and right binocular. This difference is synthesized in the brain and perceived as a three-dimensional image. This principle is the basic principle applied to stereoscopic image reproduction.

There are two ways to view three-dimensional images: glasses and glasses-free. Among them, the method of wearing glasses includes an anaglyph method of wearing blue and red sunglasses, respectively; A polarization method using polarizing glasses having different polarization directions; And a liquid crystal shutter method (or time division type) using glasses provided with a liquid crystal shutter that periodically repeats a time-divided screen and synchronizes with this period.

A three-dimensional image system using conventional liquid crystal shutter type glasses is composed of an image display device, and a liquid crystal shutter type glasses in which a liquid crystal panel and a polarizing film are disposed. In addition, the polarizer filter unit may be positioned in front of the image display apparatus (FIG. 1).

In the stereoscopic image system using the liquid crystal shutter type glasses, the image synchronization device (wired or wireless) displays the image of the liquid crystal shutter type glasses alternately and quickly displays the left eye image and the right eye image, and synchronizes them with the liquid crystal shutter type glasses. By opening and closing for a certain time to realize a three-dimensional image.

That is, when the left eye image is displayed on the screen, the left eye shutter of the liquid crystal shutter type glasses is opened. When the right eye image is displayed on the screen, the left eye image of the liquid crystal shutter type glasses is opened. Because it is displayed, human time hardly detects the time difference. Therefore, each image of the left and right eyes seems to be displayed continuously at the same time and continuously, so the human brain recognizes it as a stereoscopic image.

Recognition of these stereoscopic images is much more complicated and compulsive than when you see stereoscopic objects, so your brain has more work than usual.

In addition, the three-dimensional image system using the liquid crystal shutter glasses is remarkably generated flicker (glossy) to feel symptoms such as dizziness, headache, vomiting. It is often seen in people with vision problems or glaucoma patients, the symptoms often occur.

In addition, since the polarizing film is positioned on the wearer's side, the liquid crystal shutter glasses emit light of linearly polarized light. Since linear polarization has a fixed vibration direction of the vector, human eyes have more stimulation of photosensitive cells than natural light having a uniform distribution of the vector in each direction.

In connection with such eye fatigue, a method of converting light of linearly polarized light emitted from a conventional liquid crystal display device into circularly polarized or elliptically polarized light and entering the viewer's eye has been proposed [Korean Patent Laid-Open No. 2008-73678]. In this case, a wavelength retardation plate is used to convert circular or elliptical polarization. The wavelength retardation plate converts image signal light into various types of polarization by changing the phase of polarization, but the effect of changing the degree of polarization that substantially affects eye fatigue can be considered to be insignificant.

In addition, the wavelength retardation plate is required to be bonded by using an adhesive or an adhesive, there is a disadvantage that the thickness of the liquid crystal shutter glasses is thick and heavy. This is pointed out as a problem that cannot be overlooked along with eye fatigue.

Korean Patent Publication No. 2008-73678

The present invention provides a liquid crystal shutter glasses and a method of manufacturing the same that can reduce eye fatigue by reducing the polarization degree (DOP) of the linearly polarized light passed through the liquid crystal shutter glasses.

In another aspect, the present invention provides a liquid crystal shutter glasses and a method of manufacturing the same that can reduce the eye fatigue while being lightweight and thin.

1. Liquid crystal shutter type glasses including a liquid crystal panel synchronized to a time division display surface period, a polarizing film for passing the light emitted from the liquid crystal panel, and a liquid crystal coating layer for changing the polarization of the light emitted from the polarizing film.

2. In the above 1, wherein the liquid crystal coating layer is a liquid crystal shutter glasses containing a reactive liquid crystal compound.

3. In the above 2, wherein the liquid crystal coating layer is a liquid crystal shutter glasses to reduce the polarization degree (DOP) of the linearly polarized light passed through the glasses to 0.5 or less.

4. In the above 3, wherein the polarization degree (DOP) of the linearly polarized light passing through the glasses is substantially zero liquid crystal shutter glasses.

5. In the above 3, wherein the liquid crystal coating layer is a liquid crystal shutter glasses of 0.01 to 10㎛ thickness.

6. The liquid crystal shutter glasses of any one of the above 1 to 5, wherein the polarizing film is a polarizer.

7. The liquid crystal shutter glasses of any one of the above 1 to 5, wherein the polarizing film is a laminate of a polarizer and one or more transparent protective films.

8. The manufacturing method of the liquid crystal shutter glasses of the above 1 comprising applying a liquid crystal coating layer-forming composition on the polarizing film.

9. The method of claim 8, further comprising the step of curing by applying light after drying the coated liquid crystal coating layer-forming composition manufacturing method of the liquid crystal shutter glasses.

10. The method according to the above 9, wherein the liquid crystal coating layer-forming composition comprises a reactive liquid crystal compound.

11. The method according to the above 10, wherein the liquid crystal coating layer-forming composition is applied to reduce the polarization degree (DOP) of the linearly polarized light passed through the glasses to 0.5 or less.

12. The method of claim 11, wherein the liquid crystal coating layer-forming composition is coated so that the polarization degree (DOP) of the linearly polarized light passed through the glasses is substantially zero.

13. In the above 11, wherein the liquid crystal coating layer-forming composition is a method of manufacturing a liquid crystal shutter type glasses are applied so that the coating layer thickness after drying is 0.01 to 10㎛.

14. The method of any one of 9 to 13 above, wherein the polarizing film is a polarizer liquid crystal shutter method glasses.

15. The method according to any one of 9 to 13, wherein the polarizing film is a laminate of polarizer and one or more transparent protective films.

The liquid crystal shutter glasses of the present invention can reduce visual fatigue of the eyes, allowing viewing of stereoscopic images for a long time, and is effective for protecting eye health.

In addition, since the liquid crystal shutter glasses of the present invention are formed with a liquid crystal coating layer of the sub-micro unit, it is possible to reduce the weight and thickness.

In addition, the present invention can be easily manufactured since the polarization degree (DOP) of linearly polarized light is reduced without considering the transmission axis of the polarizer provided in the glasses for stereoscopic image display.

Figure 1 shows the configuration of a three-dimensional image system using a conventional liquid crystal shutter glasses,
Figure 2 shows an example of the liquid crystal shutter glasses according to the first embodiment of the present invention,
3 is a simplified view showing the principle of the liquid crystal shutter glasses according to the first embodiment of the present invention,
Figure 4 shows an example of a liquid crystal shutter glasses according to a second embodiment of the present invention,
Figure 5 briefly shows the principle of the liquid crystal shutter glasses according to a second embodiment of the present invention,
Figure 6 shows an example of the liquid crystal shutter glasses according to a third embodiment of the present invention,
Figure 7 briefly shows the principle of the liquid crystal shutter glasses according to Comparative Example 1,
8 shows a liquid crystal shutter glasses according to Comparative Example 2,
Figure 9 briefly shows the principle of the liquid crystal shutter glasses according to Comparative Example 2.

The present invention relates to a liquid crystal shutter type glasses and a method of manufacturing the same that can reduce eye fatigue when viewing stereoscopic images.

Hereinafter, the liquid crystal shutter type glasses of the present invention will be described in detail.

The liquid crystal shutter glasses of the present invention include a liquid crystal panel synchronized with a time division display surface period, a polarizing film for passing the light emitted from the liquid crystal panel, and a liquid crystal coating layer for changing the polarization of the light emitted from the polarizing film.

In addition, in the three-dimensional image system to which the liquid crystal shutter glasses of the present invention is applied, a polarizing film or a retardation film may be included on the image display device as necessary. In addition, the liquid crystal shutter glasses may be provided with a polarizing film that is positioned before the liquid crystal panel to pass the light emitted from the image display device.

In the stereoscopic image system using the liquid crystal shutter type glasses, the left and right eye images are quickly displayed alternately in the image display device, and the left and right sides of the liquid crystal shutter type glasses are opened and closed for a predetermined time by an image synchronization device (wired or wireless) synchronized thereto. Recognize stereoscopic images.

The image display device is not particularly limited as long as it is a device that periodically scans image signals on the screen. For example, a cathode ray tube (CRT), a liquid crystal display, an organic light emitting diode (OLED) plasma display, a projector, or the like may be used, and a flat panel display such as a dual liquid crystal display (OLED) or the like is preferable. When the polarizer filter is built-in and arranged in the outermost surface of an image display apparatus, it is not necessary to provide a polarizer filter further.

The liquid crystal panel of the liquid crystal shutter type glasses has a structure in which a transparent liquid crystal material is filled between two transparent electrodes, and the liquid crystal material of TN, STN, IPS, VA, PVA, MVA, SMVA, and OCB modes may be used. Preferably, STN is used in terms of response speed.

When a voltage is applied between the two electrodes, the arrangement direction of the liquid crystal material changes, and the transmitted light is changed according to the arrangement direction of the liquid crystal material. For example, if no voltage is applied, the transmission axis of the linearly polarized light that has passed through the liquid crystal panel is changed vertically.

The polarizing film contains a polarizer alone or a laminating agent of a polarizer and one or more transparent protective films. At this time, the liquid crystal panel / adhesive / transparent protective film / polarizer / transparent protective film / liquid crystal coating layer; Liquid crystal panel / adhesive agent / polarizer / transparent protective film / liquid crystal coating layer; Liquid crystal panel / adhesive agent / transparent protective film / polarizer / liquid crystal coating layer; Liquid crystal shutter type glasses having a structure such as a liquid crystal panel / adhesive / polarizer / liquid crystal coating layer. In addition, the configuration in which the polarizing film is disposed on both sides of the liquid crystal panel may also be included in the present invention.

In addition, the polarizing film, the liquid crystal panel, and the polarizer and one or more transparent protective films may be bonded using a known adhesive or pressure-sensitive adhesive.

The polarizing film serves to block or transmit light passing through the liquid crystal panel.

The polarizer is not particularly limited as long as the polarizer can generally perform a polarizing function.

For example, a polarizer manufactured by dyeing iodine or dichroic dye on a PVA (polyvinyl alcohol) film and stretching it in a predetermined direction may be used. In addition, as an example, a thin polarizing plate having a fine pattern of conductive gratings having a polarizing function on the transparent substrate and having an insulating layer coated on the valleys and floors of the grating may be used.

The polarizer may be laminated on at least one surface of the polarizer to prevent the polarization degree is reduced by high temperature and high humidity.

As the transparent protective film, a film excellent in transparency, mechanical strength, thermal stability, moisture shielding, isotropy, and the like may be used. Specific examples include polyester resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate and polybutylene terephthalate; Cellulose resins such as diacetyl cellulose and triacetyl cellulose; Polycarbonate resin; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin-based resins such as polyethylene, polypropylene, cyclo-based or norbornene-structured polyolefins, ethylene-propylene copolymers; Vinyl chloride-based resins; Amide resins such as nylon and aromatic polyamides; Imide resin; Polyether sulfone resin; Sulfone resins; Polyether sulfone resin; Polyether ether ketone resins; Sulfided polyphenylene resins; Vinyl alcohol-based resins; Vinylidene chloride-based resins; Vinyl butyral resin; Allyl resins; Polyoxymethylene resin; And films composed of thermoplastic resins such as epoxy resins, and the like, and films composed of blends of the above thermoplastic resins may also be used. Moreover, the film of thermosetting resin or ultraviolet curable resin, such as (meth) acrylic-type, urethane type, acrylurethane type, epoxy type, and silicone type, can also be used.

The content of the thermoplastic resin in the transparent protective film is 50 to 100% by weight, preferably 50 to 99% by weight, more preferably 60 to 98% by weight, most preferably 70 to 97% by weight. If the content is less than 50% by weight, it may not sufficiently express the original high transparency possessed by the thermoplastic resin.

Such a transparent protective film may be one containing an appropriate one or more additives. As an additive, a ultraviolet absorber, antioxidant, a lubricating agent, a plasticizer, a mold release agent, a coloring agent, a flame retardant, a nucleating agent, an antistatic agent, a pigment, a coloring agent, etc. are mentioned, for example.

The liquid crystal coating layer serves to reduce the degree of polarization (DOP) of the linearly polarized light passing through the glasses by passing the light emitted from the polarizing film so as to be close to natural light.

The liquid crystal coating layer is formed on the wearer side of the polarizing film. For example, it is formed on the wearer side of the polarizer or the wearer side of the polarizer and at least one transparent protective film laminate.

The degree of polarization DOP may be expressed as a degree of polarization (DOP) according to Equation 1 below. In this case, light having a degree of polarization of 1 is completely polarized light (circularly polarized light, linearly polarized or elliptically polarized light), and light of 0 is called natural light.

(S0, S1, S2, and S3 are Stokes Parameters).

Since the eye is adapted to natural light in a long-term development process, it is most desirable to reduce the degree of polarization (DOP) so as to be incident on the eye of the spectacle wearer to represent natural light.

Since the human eye feels the polarization degree (DOP) at 0.5 or less, similar to natural light (polarization degree 0), the polarization degree (DOP) of light passing through the liquid crystal shutter type glasses is preferably maintained at 0.5 or less.

More preferably, the polarization degree DOP is substantially zero. Substantially zero polarization degree (DOP) means a range that can be detected by the human eye similarly to the polarization degree (DOP) is zero. Specifically, the polarization degree DOP means a range of 0.1 or less.

In this case, the degree of polarization may be controlled by the thickness of the liquid crystal coating layer.

The liquid crystal coating layer is prepared by applying a liquid crystal coating layer forming composition on a polarizing film. For example, it may be applied to the wearer side of the polarizer or the wearer side of the polarizer and one or more transparent protective films.

The liquid crystal coating layer-forming composition has optical anisotropy and may be used by containing a liquid crystal compound having crosslinkability by light. For example, it is preferable to use a reactive liquid crystal compound (RM). Examples of the reactive liquid crystal compound (RM) include those described in Information Display 10, No. 1 (Recent Research Trends of Reactive Liquid Crystal Monomer (RM)).

The reactive liquid crystal compound refers to a monomer molecule having a liquid crystal phase including a mesogen capable of expressing liquid crystal and a terminal group capable of polymerization. By polymerizing the reactive liquid crystal compound, it is possible to obtain a crosslinked polymer network while maintaining the aligned phase of the liquid crystal. When the reactive liquid crystal compound molecules are cooled from the clearing point, a large area domain having a structure that is better aligned at a relatively low viscosity in the liquid crystal phase may be obtained than when the liquid crystal polymer having the same structure is used.

The large area liquid crystal crosslinked network film thus formed is mechanically and thermally stable because it has a solid thin film form while maintaining properties such as optical anisotropy and dielectric constant of the liquid crystal.

The coating layer forming composition is used after dilution in a solvent in order to ensure the efficiency of the coating process and uniformity of the coating layer, preferably, it is preferably dissolved in a solvent capable of dissolving the liquid crystal compound.

For example, the reactive liquid crystal compound may be a solvent capable of dissolving it, specifically, a coating layer formed using one or two or more mixed solvents selected from propylene glycol monomethyl ether acetate (PGMEA), methyl ethyl ketone (MEK), xylene, and chloroform. Prepare the composition.

In addition, the reactive liquid crystal compound comprises an initiator for polymerizing and crosslinking it to prepare a coating layer forming composition. As the initiator, a known photopolymerization initiator or a thermal polymerization initiator may be used, and a photopolymerization initiator is preferable because of easy reaction time and control. The initiator is 10% by weight or less, preferably 0.1 to 5% by weight based on the total solids of the reactive liquid crystal compound.

In addition, the reactive liquid crystal compound further includes an additive to prepare a coating layer forming composition. Additives include, for example, dispersants, binders (eg, free radical polymerizable and cationic polymerizable binders), preservatives (eg, glutaraldehyde, tetramethylolacetyleneurea), silane coupling agents, leveling agents, crosslinking agents, antioxidants Degassers, defoamers, viscosity modifiers, flow improvers, sedimentation inhibitors, gloss improvers, lubricants, adhesion promoters, anti-skinning agents, metting agents, emulsifiers, stabilizers, hydrophobic agents, light stabilizer additives, treatment improvers and antistatic agents have.

The coating method is not particularly limited, but specifically, pin coating, roll coating, dispensing coating, or gravure coating may be used. It is desirable to determine the type and amount of solvent depending on the coating method.

The liquid crystal coating layer is coated to have a thickness of 0.01 to 10 μm, preferably 0.1 to 5 μm after drying. 10 占 퐉 is a thickness capable of converting linearly polarized light into natural light, and if it exceeds this range, there is a problem of increasing the thickness of the liquid crystal shutter type glasses. Moreover, when it is less than 0.01 micrometer, there exists a problem that the effect of the fall of the polarization degree (DOP) of linearly polarized light cannot be acquired.

The solvent contained in the coating layer forming composition is evaporated through a drying process.

Drying is not particularly limited and can be generally carried out using a hot air dryer or a far infrared heater, and the drying temperature is usually 30 to 100 ° C, preferably 50 to 80 ° C, and the drying time is usually 30 to 600 seconds, preferably It is preferable that it is 120 to 600 seconds. In addition, drying may be carried out at the same temperature conditions, or may be performed while raising the temperature step by step.

After drying, photocuring is carried out by light irradiation such as ultraviolet rays or thermosetting by heat irradiation such as a heater to form a liquid crystal coating layer.

The present invention may include an anti-glare laminate in order to protect the liquid crystal coating layer and to prevent surface shine. In addition, a surface treatment layer such as a hard coating layer, an antireflection layer, an anti-stick layer, a diffusion barrier layer, and an anti-glare layer may be further stacked.

The liquid crystal shutter type glasses may be manufactured by bonding a polarizing film having a liquid crystal coating layer formed thereon on a liquid crystal panel with a known adhesive or an adhesive.

In addition, the liquid crystal shutter glasses may be prepared by forming a liquid crystal coating layer on the polarizing film bonded to the liquid crystal panel.

In the case where the polarizing film is a polarizer, the liquid crystal coating layer may serve as a polarizer protective film, and thus, light weight and thinning of the liquid crystal shutter type glasses may be achieved.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

Example 1

Referring to FIG. 2, a 42 ”image display device (liquid crystal panel) screen 10 on which a stereoscopic image is displayed is prepared, and a polarizer filter 21 is disposed on the front surface of the 42” image display device 10. ) Was placed.

STN-mode liquid crystal panel 31 synchronized with the time-divided display surface period, the polarizer 33 and the transparent protective film 37 is laminated to include a polarizing film and a liquid crystal coating layer 41 for passing the light emitted from the liquid crystal panel Liquid crystal shutter type glasses were placed.

In the polarizer 33, iodine was adsorbed and oriented on a PVA (polyvinyl alcohol) -based film, and the triacetyl cellulose transparent protective film 37 was bonded to both sides of the polarizer 33 and constructed. The adhesive used the acrylic adhesive.

A coating layer forming composition containing a reactive liquid crystal compound (Merck, RMS03-013) was applied onto the wearer's transparent protective film 37 and preliminarily dried at 80 ° C. for 30 seconds. Thereafter, the film was dried at 110 ° C. for 5 seconds to form a liquid crystal coating layer 41 having a thickness of 3 μm, and photocured with ultraviolet light for 500 seconds with a 14 mW exposure lamp to prepare a polarizing film having a liquid crystal coating layer.

Subsequently, the polarizing film in which the liquid crystal coating layer 41 was laminated was cut in accordance with the size of the STN mode liquid crystal panel 31 of the liquid crystal shutter glasses. The cut polarizing film and the liquid crystal panel were bonded with an acrylic adhesive to prepare liquid crystal shutter glasses. At this time, the degree of polarization (DOP) of the light passing through the glasses was set to zero.

Figure 3 shows the principle that can confirm the three-dimensional image of the liquid crystal shutter glasses. The light emitted from the image display device 10 is transmitted only by the polarizer filter 21 whose linear polarization direction is a horizontal component.

The linearly polarized light of the horizontal component passes through the linearly polarized light in the vertical component when no voltage is applied to the liquid crystal panel 31, and the linearly polarized light in the vertical direction is the same as the transmission axis 34 of the polarizer 33 of the wearer. Through 37, the left eye image can be viewed. The liquid crystal coating layer 41 formed on the transparent protective film 37 changes linearly polarized light into natural light to recognize an image.

On the other hand, when voltage is applied, the linearly polarized light of the horizontal component passes through the horizontal component perpendicular to the transmission axis 34 of the wearer-side polarizer 33 in the liquid crystal panel 31, so that the left eye image cannot be viewed. The same principle applies to the case where the right eye image is displayed.

Example 2

In the same manner as in Example 1, the polarizer 35 was bonded to the image display device side of the liquid crystal panel 31 to arrange liquid crystal shutter glasses as shown in FIG. 4. The polarizer 35 and the liquid crystal panel 31 were bonded using an acrylic pressure sensitive adhesive.

FIG. 5 is the same as that of FIG. 3 in which a stereoscopic image of liquid crystal shutter type glasses can be confirmed, but the linear polarization direction of the horizontal component is transmitted again through the polarizer 35.

Example 3

In the same manner as in Example 1, the liquid crystal coating layer was manufactured to the liquid crystal shutter glasses so that the degree of polarization (DOP) of the light passing through the glasses to be 0.4. At this time, the thickness of the liquid crystal coating layer was 2.3 μm.

The principle of confirming the stereoscopic image of the liquid crystal shutter glasses is the same as in FIG.

Example 4

In the same manner as in Example 1, as shown in FIG. 6, liquid crystal shutter glasses were formed in which the liquid crystal coating layer 41 was formed on the wearer side of the polarizer 33.

The principle of confirming the stereoscopic image of the liquid crystal shutter glasses is the same as in FIG.

Comparative Example 1

In the same manner as in Example 1, but the liquid crystal shutter glasses were prepared as shown in FIG.

The principle of confirming the stereoscopic image of the liquid crystal shutter glasses of FIG. 7 is the same as that of FIG.

Comparative Example 2

In the same manner as in Example 1, but instead of the liquid crystal coating layer 41 as shown in Fig. 8 was bonded to the lambda / 4 phase difference layer 43 to prepare a liquid crystal shutter glasses. At this time, the bonding was used acrylic adhesive.

The principle of confirming the stereoscopic image of the liquid crystal shutter glasses of FIG. 9 is the same as that of FIG. 3 except that the λ / 4 retardation layer 43 formed on the transparent protective film 37 changes the linearly polarized light into circularly polarized light. Make it aware.

Experimental Example 1

Eye electrophysiological signals were recorded using an eye conduction recorder, and the frequency of eye blinks (frequency / 100 sec) was measured therefrom.

The blinking frequency of the eye is shown in Table 1 by recording the number of times during observation of the three-dimensional image before and after wearing the liquid crystal shutter glasses. At this time, the blinking frequency was calculated the average value of 50 spectators.

division Eye blink rate (frequency / 100 seconds) Before wearing After wearing (2 hours) Example 1 (natural light) 40 60 Example 2 (natural light) 40 61 Example 3 (similar to natural light) 40 63 Example 4 (natural light) 40 62 Comparative Example 1 (Linear Polarization) 40 81 Comparative Example 2 (Circular Polarization) 40 69

As shown in Table 1, Examples 1 to 4 converted to natural light using the liquid crystal shutter glasses according to the present invention significantly reduced visual fatigue of the eye compared to Comparative Example 1 (Linear Polarization) and Comparative Example 2 (Circular Polarization) I could confirm that.

Experimental Example 2

The sensory test was performed to confirm the image quality and sharpness of the stereoscopic image. The sensory test was performed on 50 spectators and the results are shown in Table 2 below.

division Sensory test Quality definition Example 1 (natural light) ◎ ◎ Example 2 (natural light) ◎ ◎ Example 3 (similar to natural light) ◎ ◎ Example 4 ◎ ◎ Comparative Example 1 (Linear Polarization) ◎ ○ Comparative Example 2 (Circular Polarization) △ △

[Assessment Methods]

◎: Very good ○: Excellent △: Normal Ⅹ: Poor

As shown in Table 2, Examples 1 to 4 converted to natural light using the liquid crystal shutter glasses according to the present invention was confirmed that the image quality and sharpness is excellent.

In particular, Comparative Example 2 in which the lambda / 4 phase difference layer is bonded can be confirmed that the image quality and clarity are relatively low.

10: image display device
21: polarizer filter 22: transmission axis of the polarizer filter
30: liquid crystal shutter glasses
31: liquid crystal panel
33: wearer side polarizer 34: wearer side polarizer
35: polarizer opposite to wearer 36: transmission axis of polarizer opposite to wearer
37: transparent protective film
41; Liquid crystal coating layer
43: lambda / 4 phase difference layer

Claims (15)

Liquid crystal shutter type glasses including a liquid crystal panel synchronized to a time division display surface period, a polarizing film for passing the light emitted from the liquid crystal panel and a liquid crystal coating layer for changing the polarization of the light emitted from the polarizing film.
The glasses of claim 1, wherein the liquid crystal coating layer comprises a reactive liquid crystal compound.
The glasses according to claim 2, wherein the liquid crystal coating layer reduces the polarization degree (DOP) of the linearly polarized light passing through the glasses to 0.5 or less.
The liquid crystal shutter glasses according to claim 3, wherein the polarization degree (DOP) of the linearly polarized light passing through the glasses is substantially zero.
The liquid crystal shutter glasses of claim 3, wherein the liquid crystal coating layer has a thickness of 0.01 to 10 μm.
The glasses according to any one of claims 1 to 5, wherein the polarizing film is a polarizer.
The liquid crystal shutter type glasses according to any one of claims 1 to 5, wherein the polarizing film is a laminate of a polarizer and at least one transparent protective film.
Method of manufacturing a liquid crystal shutter glasses of claim 1 comprising applying a liquid crystal coating layer-forming composition on the polarizing film.
The method of claim 8, further comprising curing the coated liquid crystal coating layer-forming composition after drying with light.
The method of claim 9, wherein the liquid crystal coating layer-forming composition comprises a reactive liquid crystal compound.
The method of claim 10, wherein the liquid crystal coating layer-forming composition is applied to reduce the polarization degree (DOP) of linearly polarized light passing through the glasses to 0.5 or less.
The method of claim 11, wherein the liquid crystal coating layer-forming composition is coated such that the polarization degree (DOP) of linearly polarized light passing through the glasses is substantially zero.
The method of claim 11, wherein the liquid crystal coating layer-forming composition is coated so that the thickness of the coating layer after drying is 0.01 to 10 μm.
The method according to any one of claims 9 to 13, wherein the polarizing film is a polarizer.
The manufacturing method of the liquid crystal shutter type | mold glasses of any one of Claims 9-13 which is a laminated body of a polarizer and one or more transparent protective films.

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