WO2019117588A1 - 웨어러블 디바이스 - Google Patents
웨어러블 디바이스 Download PDFInfo
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- WO2019117588A1 WO2019117588A1 PCT/KR2018/015680 KR2018015680W WO2019117588A1 WO 2019117588 A1 WO2019117588 A1 WO 2019117588A1 KR 2018015680 W KR2018015680 W KR 2018015680W WO 2019117588 A1 WO2019117588 A1 WO 2019117588A1
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- Prior art keywords
- plastic lens
- light
- base material
- lens base
- less
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1852—Manufacturing methods using mechanical means, e.g. ruling with diamond tool, moulding
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating three-dimensional [3D] models or images for computer graphics
- G06T19/006—Mixed reality
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/045—Light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
Definitions
- the present invention relates to a wearable device.
- a wearable device such as a virtual reality device or an augmented reality device can form a diffracted light guide pattern on a lens such as a general eyeglass to make a desired image visible to a user.
- a lens base material for a wearable device uses a glass base material having a high refractive index.
- the glass base material has an advantage of having a high refractive index and a light transmittance, but can damage the eyeball of the user at the time of breakage, There is an inconvenience in wearing for a long time.
- the present invention provides a wearable device. Specifically, the present invention provides a wearable device to which a plastic lens substrate is applied.
- One embodiment of the present invention relates to a plastic lens substrate; And a diffracting light guide portion provided on the plastic lens base material, wherein the thickness of the plastic lens base material is 0.4 mm or more and 1.5 mm or less, and the thickness deviation with respect to the average thickness of the plastic lens base material is 1 %, And the total number of times of total reflection of diffracted light is 30 times or more and 40 times or more and 100 times or less for a length of 30 mm on the plastic lens base material.
- the wearable device according to one embodiment of the present invention is advantageous in that it is lighter than a wearable device to which a conventional glass substrate is applied as a lens substrate, and is relatively safe at the time of breakage.
- the wearable device can prevent the total amount of diffracted light from being adjusted to be excessively high so that the amount of extracted light is not weakened.
- the wearable device can realize excellent resolution by applying a plastic lens base material having a small thickness deviation.
- the wearable device according to one embodiment of the present invention is advantageous in that the volume of the product can be made smaller by applying a thin plastic lens base material.
- FIG. 1 is a view schematically showing that light incident on a plastic lens substrate applied to a wearable device according to an embodiment of the present invention is diffracted and totally reflected on the inside of the plastic lens substrate.
- FIG. 2 is a view schematically showing a diffraction light guiding pattern of a diffractive light guiding part provided on a plastic lens substrate applied to a wearable device according to an embodiment of the present invention, and diffracting incident light by the pattern.
- FIG. 3 is a view schematically showing that the total number of times of total reflection of diffracted light varies in the plastic substrate depending on the thickness of a plastic lens base material applied to a wearable device according to an embodiment of the present invention.
- FIG. 4 is a view schematically showing a process of extracting light input from a micro-display through a user's eyes through a plastic lens base applied to a wearable device according to an embodiment of the present invention.
- Fig. 5 is a graph showing the relationship between the incident angle [theta] o and the diffraction angle [theta] when the refractive index of the diffracting light guiding portion on the plastic lens substrate applied to the wearable device according to an embodiment of the present invention is 1.7 and the pitch is 425 nm and the wavelength of the incident light is 532 nm. &thetas; d ).
- FIG. 6 is a graph showing an image analyzed by an image-J program by an image output by a wearable device according to an embodiment of the present invention.
- a member When a member is referred to herein as being “on " another member, it includes not only a member in contact with another member but also another member between the two members.
- the term "length of the substrate” means a direction parallel to the substrate surface and a direction from the center of the first region to the center of the second region in the diffractive light guiding portion on the plastic lens substrate.
- the particle size of the particles can be measured by a scanning electron microscope (SEM) image, a transmission electron microscope (TEM) image or a particle size analyzer (Malvern, Japan).
- the particle size of the particles may be a secondary particle size measured by dynamic light scattering on a colloidal nano solution using a particle size analyzer.
- the average particle diameter of the particles is measured by TEM (transmission electron microscope), and the maximum diameter of 50 to 100 particles is measured at a magnification ratio of one smallest particle to 2 mm to 5 mm
- the average value can be obtained by the average particle diameter.
- the glass transition temperature (T g ) is measured using a DSC (Differential Scanning Calorimeter) (DSC 823e; Mettler Toledo) at a heating rate of 10 ° C / min in a temperature range of -15 ° C to 200 ° C And may be a value determined as the midpoint of the DSC curve.
- DSC Different Scanning Calorimeter
- the optical refractive index can be a value measured based on a wavelength of 532 nm using a Cauchy Film Model using Spectroscopy Ellipsometry (Ellipsometer M-2000, J.A. Woollam) at 25 ⁇ and 50 RH%.
- the field of view may mean the range of the incident angle at which the traveling angle of the diffracted light becomes larger than the minimum traveling angle at which total reflection in the plastic lens base is possible.
- the light transmittance may be a value measured in a transmittance mode using a Solidspec 3700, a UV-Vis-NIR Spectrophotometer equipment of SHIMADZU.
- haze may be a value measured by COH-400 of Nippon Denshoku.
- the surface flatness can be an Ra value measured by Park Systems' AFM machine NX10 for 4 ⁇ x 4 ⁇ area using Nanoworld's NCHR-50 AFM Probe.
- the duty can mean "width of pattern structure / pitch of pattern structure ".
- brightness and resolution can be measured from an image that is incident on a plastic lens substrate using a specific light source, and is output through total reflection.
- a surface light source was formed by adhering a diffuser in front of the LED light source (SML-LX1610RGBW, A, 525 nm), and then a UASF 1951 resolution chart was attached.
- the distance between the incident portion of the specimen and the light source was set to 1 mm do.
- the incident light should be incident in a direction perpendicular to the specimen.
- position the CCD monitor CA 2000 so that the distance between the exit of the specimen and the specimen is 17 mm.
- the image output from the diffracted light guiding sample is analyzed using an Image-J program, and the maximum value (I max ) of the measured luminance is taken as the luminance value.
- the resolution can be measured by a modulation transfer function (MTF) measurement method.
- MTF modulation transfer function
- the MTF of each horizontal and vertical stripe is calculated and the arithmetic mean is used as the MTF value of the diffracted light guiding sample.
- the MTF is obtained by analyzing the image of the photograph output from the diffracted light guide sample using an Image-J program and using the following equation (1).
- I max and I min are values of three points as shown in the area (I max : red circle, I min : blue circle) shown in FIG. 6, and each average value is used.
- the inventors of the present invention have found that the refractive index of the diffractive light guide portion, Thickness, thickness variation, and total number of incidence of incident light have a significant effect on the performance of the wearable device. Further, by adjusting the refractive index of the diffracting light guide portion and the pitch of the diffracting light guiding pattern applied to the wearable device to control the diffraction angle of the diffracted light advancing in the plastic lens base material and adjusting the refractive index, thickness, The inventors invented a plastic lens substrate optimized for a wearable device by controlling the total reflection characteristic of the light.
- One embodiment of the present invention relates to a plastic lens substrate; And a diffracting light guiding portion including a diffracting light guiding pattern provided on the plastic lens substrate.
- FIG. 1 is a view schematically showing that light incident on a plastic lens substrate applied to a wearable device according to an embodiment of the present invention is diffracted and totally propagates through the inside of the plastic lens substrate
- FIG. 2 is a cross- The diffraction light guiding pattern of the diffracting light guiding portion provided on the substrate is enlarged and the diffracting light guiding pattern diffracts the incident light.
- the incident light 210 incident on the diffracting light guiding unit 100 is incident at an incident angle of 0
- Diffracted light 220 propagates the inside of the plastic lens base 300 to the diffraction angle of? D.
- the diffraction angle of the light incident on the diffracting light guiding portion in which the diffracting light guiding pattern is formed can be obtained by the following expression (2).
- n denotes the refractive index of the diffracting light guide
- n 0 denotes the refractive index of air
- a denotes the pitch of the diffractive light guiding pattern.
- the thickness of the plastic lens base material is 0.4 mm or more and 1.5 mm or less.
- the thickness of the plastic lens base material may be 0.4 mm or more and 1.3 mm or less, 0.5 mm or more and 1.1 mm or less, or 0.6 mm or more and 1 mm or less.
- Fig. 3 is a view schematically showing that the total number of times of total reflection of diffracted light in the plastic substrate varies depending on the thickness of the plastic lens base material.
- the thickness of the plastic lens base 300 is reduced, the total number of times of diffraction light 220 having the same diffraction angle is increased. Therefore, when the thickness of the plastic lens base material 300 is within the above range, it is possible to prevent an excessive amount of total reflection of the diffracted light 220, thereby minimizing the loss of the light amount and further advantageously minimizing the volume of the wearable device have.
- the thickness deviation with respect to the average thickness of the plastic lens base material is 1% or less. Specifically, the thickness deviation with respect to the average thickness of the plastic lens base material may be 0.5% or less.
- the thickness deviation with respect to the average thickness of the plastic lens base material can be derived by the following equation (3).
- Thickness deviation (%) ⁇ (maximum thickness - minimum thickness) / average thickness ⁇ x 100
- the maximum thickness, the minimum thickness and the average thickness of a member can be obtained by a noncontact measurement method using OWTM (Optical Wafer Thickness Measurement) equipment of FiberPro at 25 ⁇ and 50 RH%. Specifically, a sample having a size of 50 mm x 50 mm was prepared, and the thickness was measured at intervals of 1 mm and width with respect to an area of 40 mm x 40 mm excluding 5 mm from the ends of the corners, After obtaining the thickness value, the highest value is the maximum thickness, the lowest value is the minimum thickness, and the average thickness can be obtained through the arithmetic average value of the total 1681 points measured.
- OWTM Optical Wafer Thickness Measurement
- the "thickness deviation with respect to the average thickness” can be used in the same meaning as “thickness deviation ".
- the thickness deviation of the plastic lens base material is much lower than the thickness deviation (2% to 5%) of a general plastic lens base material, Can be output.
- the total number of times of total reflection of the diffracted light is 30 times or more and 100 times or less per 30 mm in length on the plastic lens substrate.
- the total number of times of total reflection of diffracted light per 30 mm of the length on the plastic lens substrate may be 40 or more and 80 or less, 40 or more or 50 or less, or 40 or more and 45 or less.
- the total reflection number may be based on light having a wavelength of 532 nm.
- the refractive index of the diffracting light guide portion and the plastic lens base material at a wavelength of 532 nm may be 1.65 or more.
- a high refractive index glass substrate may have a refractive index of 1.65 or more at a wavelength of 532 nm
- the plastic lens base material according to an embodiment of the present invention has a refractive index equal to or higher than that of the glass base material, The present invention can be applied to a wearable device.
- the refractive index difference between the diffracting light guiding portion and the plastic lens substrate may be 0.05 or less.
- the refractive index difference is in the above range, the loss of light between the diffracting light guiding portion and the plastic lens base material can be minimized.
- the wearable device may have a viewing angle of 30 degrees or more. More specifically, the viewing angle may be 40 DEG or more.
- the viewing angle may be 40 DEG or more.
- FIG. 5 is a graph showing the relationship between the refractive index of the diffracting light guiding portion of the plastic lens base material applied to the wearable device and the wavelength of incident light of 532 nm and the pitch of the diffracted light guiding pattern included in the diffracting light guiding portion of the wearable device according to an embodiment of the present invention is 425 nm shows a diffraction angle ( ⁇ d) of the incident angle ( ⁇ o) when.
- the minimum diffraction angle (? Min , critical angle) at which total reflection occurs can be obtained by the following expression (4).
- the pitch of the diffracting light guide pattern may be 100 nm or more and 800 nm or less, and the height may be more than 0 nm and 500 nm or less.
- the pitch of the diffracting light guide pattern is 100 nm or more and 500 nm or less, 100 nm or more and 300 nm or less, 200 nm or more and 700 nm or less, 200 nm or more and 500 nm or less, 200 nm or more and 300 nm or less, 400 nm or more and 700 nm or less, 400 nm or more and 500 nm or less, 500 nm or more and 700 nm or less, or 600 nm or more and 700 nm or less.
- the height of the diffracting light guide pattern may be more than 0 nm and not more than 400 nm, more than 0 nm and not more than 300 nm, or more than 0 nm and not more than 200 nm.
- the duty and the Slanted angle of the diffracting light guide pattern can be appropriately adjusted within a range to be applied to a normal diffracting light guide portion.
- the haze of the plastic lens substrate may be 1% or less.
- the light transmittance of the plastic lens base material at a wavelength of 532 nm may be 80% or more.
- the range of the haze and the light transmittance of the plastic lens base material is within the above range, it is possible to have a transparency suitable for the wearable device application and further to increase the resolution of the image output through the plastic lens base material.
- the surface flatness of the plastic lens substrate may be 1 m or less.
- the surface flatness may be as defined surface roughness (R a). Specifically, when the surface flatness is within the above range, the path of the diffracted light in the plastic lens base can be prevented from being distorted. Furthermore, degradation in resolution of an image output through the plastic lens base can be minimized.
- the plastic lens base material may include inorganic particles having a refractive index at a wavelength of 532 nm of 1.8 or more and a particle diameter of 50 nm or less.
- the inorganic particles may include at least one selected from silica, alumina, zirconia, zeolite, and titanium oxide.
- the inorganic particles may have a refractive index at the wavelength of 532 nm of 1.8 or more, specifically 1.9 or more, more specifically 2.0 or more.
- the optical refractive index of an inorganic particle can be measured using an Abbe's refractometer. Further, the refractive index of the plastic substrate prepared by mixing the inorganic particles and the acrylate binder can be easily calculated by measuring the refractive index with an Ellipsometer.
- the plastic substrate prepared by mixing 50 parts by weight of inorganic particles with 50 parts by weight of acrylate HR6042 has a refractive index of RI based and a volume fraction of acrylate of V acrylic
- the inorganic particles can play a role of realizing a refractive index of the plastic lens base material of 1.65 or more.
- the particle size of the inorganic particles may be 50 nm or less. Specifically, the particle size of the inorganic particles may be 40 nm or less, 35 nm or less, or 30 nm or less. The particle size of the inorganic particles may be 5 nm or more, or 10 nm or more. Furthermore, the particle size of the inorganic particles may be an average particle size.
- the inorganic particles can maintain a high dispersibility at the time of manufacturing the plastic lens substrate, and further, transparency can be imparted to the plastic lens substrate, thereby greatly improving the optical refractive index.
- the content of the inorganic particles may be 20 parts by weight or more and 70 parts by weight or less based on 100 parts by weight of the polymer matrix of the plastic lens base.
- the content of the inorganic particles may be 25 parts by weight or more and 70 parts by weight or less, or 30 parts by weight or more and 70 parts by weight or less, based on 100 parts by weight of the polymer matrix of the plastic lens base.
- the refractive index of the plastic lens base material may be 1.65 or more at a wavelength of 532 nm.
- the plastic lens substrate may be formed using a matrix composition comprising a sulfur-containing compound containing at least 20 wt% of sulfur atoms.
- the sulfur-containing compound may serve to control the refractive index of the plastic lens base material to a high level.
- the sulfur-containing compound may include at least one selected from a thiol group-containing compound, a thiourethane group-containing compound and a thioepoxy group-containing compound.
- the thiol group-containing compound is a compound containing at least one thiol group (-SH) in the molecule, and examples thereof include methanedithiol, 1,2-ethanedithiol, 1,1-propanedithiol, Dithiol, 1,3-propanedithiol, 2,2-propanedithiol, 1,6-hexanedithiol, 1,2,3-propanetriethiol, bis (2-mercaptoethyl) , 3-dimercaptopropanyl) sulfide, bis (2,3-dimercaptopropanyl) disulfide, bis (mercaptomethyl) -3,6,9-trithiandecane-1,11- (2-mercaptoacetate), pentaerythritol tris (3-mercaptoacetate), trimethylolpropane tris (3-mercaptopropionate), triaeritoltetrakis thioglycolate And methylol
- the thiourethane group-containing compound can be prepared by using a compound having at least one isocyanate group (-NCO) and at least one thiol group, and by controlling the molar ratio (SH / NCO) of isocyanate to thiol, various thiourethane groups Containing compound can be prepared.
- the compound having an isocyanate group include hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanate, xylene diisocyanate, and dimethylphenylene diisocyanate.
- Examples of the thioepoxy group-containing compound include bis (2,3-epithiopropyl) sulfide, bis (2,3-epithiopropyl) disulfide, bis , 3-epithiopropylthio) cyclohexane, bis (2,3-epithiopropylthiocyclohexyl) sulfide, and the like.
- the plastic lens base material may be one in which the inorganic particles are dispersed in an acrylic polymer matrix.
- the plastic lens base material can be produced using an acrylic monomer and / or an acrylic copolymer, and a matrix composition comprising the sulfur-containing compound.
- the glass transition temperature (T g ) of the plastic lens base material may be 40 ° C or higher.
- T g the glass transition temperature of the plastic lens base material
- the plastic lens base material has an advantage that the glass transition temperature is 40 ⁇ ⁇ or higher and the change in physical properties according to temperature can be minimized even when used as a lens base material of a wearable device.
- the diffracting light guide portion may include a first region where light is incident and a second region where light is extracted.
- the diffracting light guiding portion is provided on the plastic lens substrate and may include a diffracting light guiding pattern.
- the diffracting light guiding portion may include a thermosetting resin or a photocurable resin containing a high-refraction component.
- the thermosetting resin or the photocurable resin may include at least one selected from an acrylic resin including urethane acrylate or epoxy acrylate, a polyamide resin, a polyimide resin, a silicone resin, an epoxy resin and a polyester However, it does not limit the kind.
- FIG. 4 is a view schematically showing a process of extracting light input from a micro-display through a user's eyes through a plastic lens base applied to a wearable device according to an embodiment of the present invention.
- the first region or the second region may include a diffraction light-guiding pattern whose height gradually increases from one side to the other side.
- the diffractive light guiding pattern of the second region may be provided at an inclination angle of 50 ° or more and less than 90 ° with respect to the plastic lens base material.
- the height of the diffraction light guiding pattern of the second region is gradually increased from one side to the other side of the second region, whereby light is diffracted from one side to the other side of the second region It is possible to prevent the amount of light from being reduced in the second area, and to make the light intensity of the light emitted by each part of the second area constant.
- the second region may include a diffraction light-guiding pattern gradually increasing in duty from one side to the other side.
- the second region includes a diffractive light guiding pattern gradually increasing in duty from one side to the other side, thereby gradually increasing the light refractive index from one side to the other side of the second region.
- the duty ratio of the diffraction light-guiding pattern gradually increases from one side to the other side of the second region, whereby the refractive index of the second region can be gradually increased from one side to the other side.
- the optical refraction index is gradually increased from one side of the second region to the other side, so that the light diffraction efficiency from one side to the other side of the second region can be gradually increased.
- the duty of the diffraction light guiding pattern included in the second region may be 0.1 or more and 1.0 or less.
- the pitch of the diffracting light-guiding pattern of the second region of the diffracting light guiding portion to be constant and gradually increasing the width of the diffracting light guiding pattern from one side to the other side of the second region
- the duty of the diffractive light guiding pattern can be gradually increased from one side to the other side of the second region.
- the wearable device may be an augmented reality device or a virtual reality device.
- the plastic lens base material is a lens base material of the wearable device, and may be applied as a base material for inputting, moving, and transmitting inputted optical information including a diffracting light guide portion on the one surface.
- the plastic lens base material has a high optical refractive index, optical loss can be minimized and optical information can be moved. Furthermore, since the plastic lens base material has a high glass transition temperature, it is possible to minimize changes in physical properties due to heat generated by the operation of the wearable device, thereby realizing high durability. Further, with the plastic lens substrate, the present invention can provide a wearable device that is lighter and more stable than a wearable device to which a conventional glass lens substrate is applied.
- a plastic lens base material having a refractive index of 1.70 at a wavelength of 0.5 mm and 532 nm was produced by a mold casting method using a buffered spacer using MGC Lumiplus LPJ-1102 as a material.
- the thickness deviation of the produced plastic lens base material was 0.5%.
- the produced plastic lens base material was cut into 50 x 50 mm < 2 >, and a UV curing type imprint resin was applied on one side to a thickness of 1 mu m.
- a mold in the form of a film having a pitch of 425 nm, a depth of 125 nm, and a duty of 0.4 was formed on the mold in the form of an engraved pattern, and then exposed to UV to produce a diffracted light guide portion having a diffractive light guiding pattern on the plastic lens base.
- the plastic lens base material according to Examples 2 to 4 and Comparative Examples 1 to 3 and the diffractive light guide portion on the plastic lens base material were produced in the same manner as in Example 1 except that the physical properties of the plastic lens base material were adjusted as shown in Table 1 Respectively.
- the total number of times of total reflection of the diffracted light and the glass transition temperature were measured per 30 mm of the length of the base of the plastic lens substrate prepared according to Examples 1 to 4 and Comparative Examples 1 to 3, and the results are shown in Table 1 below.
- Example 1 36 ⁇ 41 ⁇ 2.23 0.21 89.3 0.2
- Example 2 36 ⁇ 41 ⁇ 10.95 0.36 88.7 0.3
- Example 3 36 ⁇ 41 ⁇ 19.25 0.64 88.4 0.3
- Example 4 35 ⁇ 44 ⁇ 18.99 0.53 87.2 0.2
- Comparative Example 1 42 ⁇ 29 ⁇ 5.19 0.17 90.4 0.4
- Comparative Example 2 36 ⁇ 41 ⁇ 0.17 0.16 89.8 0.3 Comparative Example 3 36 ⁇ 41 ⁇ 19.03 0.19 88.4 0.3
- the wearable device according to Examples 1 to 4 is characterized in that the plastic lens base material has a thickness deviation of 0.4 mm or more and 1.5 mm or less and 1% or less and 40 times or more and 100 times or less
- the plastic lens base material has a thickness deviation of 0.4 mm or more and 1.5 mm or less and 1% or less and 40 times or more and 100 times or less
- Comparative Examples 1 and 3 the thickness deviation of the plastic lens base material was as large as 4% and 5%, respectively, and the resolution of the image to be emitted was low.
- the viewing angle was narrow and the haze was high, Can be confirmed. It is confirmed that the plastic lens base material of Comparative Example 2 in which the thickness of the plastic lens base material is as thin as 0.4 mm or less and the total number of times of reflection is 30 or more per 100 mm is extremely low in brightness and is unsuitable for wearable devices.
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- General Engineering & Computer Science (AREA)
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Abstract
Description
| 실시예 및 비교예 | 플라스틱 렌즈 기재의 재료 | 광굴절률(@ 532 nm) | 플라스틱 렌즈 기재 길이 30 mm 당회절광의 전반사 횟수 | 두께(mm) | 두께 편차(%) | Tg(℃) |
| 실시예 1 | LPJ-1102 | 1.7 | 83 | 0.5 | <1 | 90 |
| 실시예 2 | LPJ-1102 | 1.7 | 52 | 0.8 | <1 | 90 |
| 실시예 3 | LPJ-1102 | 1.7 | 41 | 1 | <1 | 90 |
| 실시예 4 | LPJ-1102+비스(2,3-에피티오프로필) 디설파이드 | 1.74 | 43 | 1 | <1 | 85 |
| 비교예 1 | 폴리카보네이트 | 1.49 | 67 | 0.5 | 4 | 145 |
| 비교예 2 | LPJ-1102 | 1.7 | 138 | 0.3 | <1 | 90 |
| 비교예 3 | LPJ-1102 | 1.7 | 41 | 1 | 5 | 90 |
| 구분 | 임계각(θmin) | 시야각(FOV) | 휘도(cd/㎡) | 해상도(MTF) | 투과도(%) | Haze(%) |
| 실시예 1 | 36˚ | 41˚ | 2.23 | 0.21 | 89.3 | 0.2 |
| 실시예 2 | 36˚ | 41˚ | 10.95 | 0.36 | 88.7 | 0.3 |
| 실시예 3 | 36˚ | 41˚ | 19.25 | 0.64 | 88.4 | 0.3 |
| 실시예 4 | 35˚ | 44˚ | 18.99 | 0.53 | 87.2 | 0.2 |
| 비교예 1 | 42˚ | 29˚ | 5.19 | 0.17 | 90.4 | 0.4 |
| 비교예 2 | 36˚ | 41˚ | 0.17 | 0.16 | 89.8 | 0.3 |
| 비교예 3 | 36˚ | 41˚ | 19.03 | 0.19 | 88.4 | 0.3 |
Claims (11)
- 플라스틱 렌즈 기재; 및 상기 플라스틱 렌즈 기재 상에 구비된, 회절 도광 패턴을 포함하는 회절 도광부를 포함하고,상기 플라스틱 렌즈 기재의 두께는 0.4 ㎜ 이상 1.5 ㎜ 이하이며,상기 플라스틱 렌즈 기재의 평균 두께에 대한 두께 편차는 1 % 이하이고,상기 플라스틱 렌즈 기재상의 길이 30 ㎜ 당 회절광의 전반사 횟수가 40 회 이상 100 회 이하인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 플라스틱 렌즈 기재의 532 ㎚ 파장에서의 광굴절률은 1.65 이상인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,시야각이 30˚ 이상인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 회절 도광 패턴의 피치(Pitch)는 100 nm 이상 800 nm 이하이고, 높이가 500 nm 이하인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 플라스틱 렌즈 기재의 헤이즈(Haze)는 1 % 이하인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 플라스틱 렌즈 기재의 532 ㎚ 파장에서의 광투과율은 80 % 이상인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 플라스틱 렌즈 기재의 유리전이온도(Tg)는 40 ℃ 이상인 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 회절 도광부는 광이 입사되는 제1 영역 및 이동된 광이 추출되는 제2 영역을 포함하는 것인 웨어러블 디바이스.
- 청구항 8에 있어서,상기 제2 영역의 회절 도광 패턴은 일측에서 타측까지 점진적으로 높이가 증가하는 것인 웨어러블 디바이스.
- 청구항 8에 있어서,상기 제2 영역의 회절 도광 패턴은 일측에서 타측까지 점진적으로 듀티(Duty)가 증가하는 것인 웨어러블 디바이스.
- 청구항 1에 있어서,상기 웨어러블 디바이스는 증강현실 디바이스 또는 가상현실 디바이스인 것인 웨어러블 디바이스.
Priority Applications (5)
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| JP2020529389A JP2021504760A (ja) | 2017-12-15 | 2018-12-11 | ウェアラブルデバイス |
| EP18888365.6A EP3712683A4 (en) | 2017-12-15 | 2018-12-11 | PORTABLE DEVICE |
| CN201880078779.5A CN111448501B (zh) | 2017-12-15 | 2018-12-11 | 可穿戴设备 |
| US16/765,888 US11681154B2 (en) | 2017-12-15 | 2018-12-11 | Wearable device including a plastic lens substrate |
| JP2022078261A JP7412843B2 (ja) | 2017-12-15 | 2022-05-11 | ウェアラブルデバイス |
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| KR20170173187 | 2017-12-15 |
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| WO2019117588A1 true WO2019117588A1 (ko) | 2019-06-20 |
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Country Status (6)
| Country | Link |
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| US (1) | US11681154B2 (ko) |
| EP (1) | EP3712683A4 (ko) |
| JP (2) | JP2021504760A (ko) |
| KR (1) | KR102215705B1 (ko) |
| CN (1) | CN111448501B (ko) |
| WO (1) | WO2019117588A1 (ko) |
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| KR102647662B1 (ko) * | 2020-01-16 | 2024-03-13 | 주식회사 엘지화학 | 광학 렌즈 및 이를 포함하는 웨어러블 디바이스 |
| KR102686409B1 (ko) * | 2022-06-16 | 2024-07-19 | 엑스퍼아이 주식회사 | 이미지 표시 광학장치 및 그 제조방법 |
| JP2024145363A (ja) * | 2023-03-31 | 2024-10-15 | 日東電工株式会社 | Arデバイス |
| CN121219626A (zh) * | 2023-05-31 | 2025-12-26 | 豪雅株式会社 | 树脂基板、导光板、眼部佩戴装置用光学构件及可穿戴设备 |
| JPWO2025142103A1 (ko) * | 2023-12-27 | 2025-07-03 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3712683A1 (en) | 2020-09-23 |
| EP3712683A4 (en) | 2020-12-23 |
| US20200355932A1 (en) | 2020-11-12 |
| KR20190072435A (ko) | 2019-06-25 |
| KR102215705B1 (ko) | 2021-02-18 |
| JP7412843B2 (ja) | 2024-01-15 |
| US11681154B2 (en) | 2023-06-20 |
| CN111448501B (zh) | 2022-03-15 |
| JP2021504760A (ja) | 2021-02-15 |
| JP2022103280A (ja) | 2022-07-07 |
| CN111448501A (zh) | 2020-07-24 |
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