KR101082043B1 - Optical sheet and optical device having the same - Google Patents

Abstract

The present invention relates to an integrated optical sheet and an optical device including the optical sheet, and more particularly, to an optical lens pattern for integrating and diffusing a diffusion film and a prism film to prevent wet-out phenomenon. The formed integrated optical sheet and an optical device employing the optical sheet.

An integrated optical sheet of the present invention, comprising: a light collecting part including a plurality of prism elements extending in a first direction; And an anisotropic diffusion portion in which a plurality of optical elements extending in a second direction different from the first direction are formed on a surface opposite to a surface on which the prism element of the light collecting portion is formed, wherein the surface on which the prism element is formed and the optical element A plurality of optical lens patterns are formed on at least one of the formed surfaces.

Optical sheet, integrated

Description

Integrated optical sheet and optical device including the same {OPTICAL SHEET AND OPTICAL DEVICE HAVING THE SAME}

The present invention relates to an integrated optical sheet and an optical device including the optical sheet. More particularly, the present invention relates to an integrated optical sheet and an optical device including an optical sheet, in which the diffusion film and the prism film are integrated and thinned to prevent wet-out and moire. An integrated optical sheet having a lens pattern and an optical device employing the optical sheet.

Liquid crystal display devices are widely used as information displays for notebooks, personal computers, TVs, and the like, and their characteristics are improved year by year as demand increases. The liquid crystal panel of the LCD which is a non-light emitting element requires a backlight unit due to its structure. The backlight unit is composed of various optical systems. In addition, the backlight unit uses an optical sheet, which is an assembly of optical films in a periodic arrangement, for improving luminance.

FIG. 22 is a diagram illustrating a structure of a conventional liquid crystal display device. Referring to FIG. 22, problems of the conventional optical sheet are described as follows. As shown in FIG. 22, the liquid crystal display device 101 includes a backlight unit 20 and a liquid crystal panel 30. The backlight unit 20 includes optical sheets 10 and 24 including a light source 21, a light guide plate 22, a diffuser film 24, and a prism film 10. . Since light generated from the light source 21 scatters through the light guide plate 22 and directly enters the eye, the pattern of the light guide plate 22 is reflected as it is. Since the pattern can be clearly detected even after mounting the liquid crystal panel 30, the diffusion film 24 minimizes or eliminates them. However, after passing through the diffusion film 24, the light luminance is diffused in both horizontal and vertical directions, and the light luminance rapidly drops. Accordingly, the prism film 10 condenses the light again to increase the light brightness. The prism film 10 has mountain-shaped fine valleys, and it is common to use two prism films laminated. When laminating | stacking a prism film, it is common to laminate | stack so that the extension direction of the prism element of each prism film may become perpendicular | vertical to each other. The light passing through the prism film 10 is directed toward the front surface with the focused viewing angle and the luminance is also improved.

In the conventional liquid crystal display device as described above, since a plurality of optical films having different functions are stacked, the assembly process is cumbersome and requires careful attention during operation, thereby reducing productivity and competitiveness due to reduced workability and product yield. The problem of degradation occurs.

In addition, the use of a plurality of films increases the overall thickness of the backlight unit, there is a disadvantage in that the manufacturing cost is increased to reduce the market competitiveness for finished products such as liquid crystal display devices.

In addition, there is a problem in that the optical coupling is generated in the process of stacking the diffusion film 24 and the prism film 10, the wet out phenomenon occurs, and the moire pattern is generated in the displayed image.

An object of the present invention to solve the above problems is to provide an integrated optical sheet thinned by integrating a portion of the plurality of films.

In addition, by integrating the optical film that was conventionally configured separately, an object of the present invention is to prevent the occurrence of infiltration phenomenon that occurred in the separate configuration process.

In addition, it is an object of the present invention to provide an optical device that improves the yield, and is implemented by adopting the integrated optical sheet as described above.

An integrated optical sheet of the present invention for achieving the above object, comprising: a light collecting portion including a plurality of prism elements extending in a first direction; And an anisotropic diffusion portion in which a plurality of optical elements extending in a second direction different from the first direction are formed on a surface opposite to a surface on which the prism element of the light collecting portion is formed, wherein the surface on which the prism element is formed and the optical element A plurality of optical lens patterns are formed on at least one of the formed surfaces.

In the integrated optical sheet of the present invention, the first direction and the second direction are substantially perpendicular.

In addition, in the integrated optical sheet of the present invention, the anisotropic diffuser is characterized in that the short axis direction of the emitted light distribution diagram substantially coincides with the second direction, and the long-to-short ratio of the emitted light distribution diagram is 2: 1 or more.

Further, in the integrated optical sheet of the present invention, the optical element of the anisotropic diffusion portion is characterized in that the lenticular.

Further, in the integrated optical sheet of the present invention, the lenticular is characterized in that the R value of 0.65 or less relative to the pitch.

In addition, in the integrated optical sheet of the present invention, the lenticular is characterized by a circular hemispherical shape or a circular semi-cylindrical shape.

In addition, in the integrated optical sheet of the present invention, it characterized in that it further comprises a translucent base between the light collecting portion and the anisotropic diffusion portion.

In the integrated optical sheet of the present invention, the optical lens patterns are distributed in an embossed form at predetermined intervals from each other.

In addition, in the integrated optical sheet of the present invention, the optical lens pattern has a shape of at least one of a circular or elliptical shape or polygonal shape in planar projection, and is a convex shape protruding upward in a partial arc shape in cross-sectional projection, It is characterized by having a concave shape recessed downward into a partial arc shape or a combination of a convex shape and a concave shape.

In addition, in the integrated optical sheet of the present invention, the optical lens pattern is characterized in that formed at equal intervals or irregular intervals.

In the integrated optical sheet of the present invention, the optical lens pattern may have a polygonal shape or a partial arc shape in cross-sectional projection, or a complex shape of the polygonal shape and the partial arc shape.

On the other hand, the optical device of the present invention, the light guide plate having an incident surface on the side; A light collecting part disposed on the light guide plate and including a plurality of prism elements extending in a first direction and having a directivity; And an anisotropic diffusion portion in which a plurality of optical elements extending in a second direction different from the first direction are formed on a surface opposite to a surface on which the prism element of the light collecting portion is formed, wherein the surface on which the prism element is formed and the optical element are An optical sheet having a plurality of optical lens patterns formed on at least one surface thereof; And a prism sheet disposed on the optical sheet.

In the optical apparatus of the present invention, the first direction and the second direction are substantially perpendicular.

Further, in the optical device of the present invention, the prism element extending direction of the prism sheet is substantially perpendicular to the first direction.

Further, in the optical device of the present invention, the prism element extending direction of the prism sheet is substantially the second direction.

Further, in the optical device of the present invention, the anisotropic diffusion portion has a short axis direction of the emitted light distribution diagram substantially coinciding with the second direction, and a long-to-short ratio of the emitted light distribution diagram is 2: 1 or more.

Further, in the optical device of the present invention, the optical lens patterns are distributed in an embossed form at predetermined intervals or linearly arranged at predetermined intervals.

In addition, in the optical device of the present invention, the optical lens pattern has a shape of at least one of a circular, elliptical, or polygonal shape in planar projection, and is a convex shape protruding upward in a partial arc shape in cross-sectional projection, or It is characterized by having a concave shape recessed downward in an arc shape, or a combination of a convex shape and a concave shape.

Further, in the optical device of the present invention, the optical lens pattern has a convex shape in which the optical cross section protrudes upward in the projection of the cross section, or a concave shape in the downward recess, or a combination of the convex shape and the concave shape. do.

In the optical apparatus of the present invention, the optical lens pattern is formed at equal or irregular intervals.

In the optical apparatus of the present invention, the optical lens pattern may have a polygonal shape or a partial arc shape in cross-sectional projection, or a combination of the polygonal shape and the partial arc shape.

The integrated optical sheet of the present invention as described above has the advantage of realizing a high brightness and uniformity of light emitted through the optical sheet and at the same time thinning by integrating a portion of the optical film constituting.

In addition, there is an advantage that can prevent the generation of moire fringes on the displayed image by preventing the infiltration of the integrated optical sheet occurs.

In particular, the optical device employing the optical sheet can be implemented in a thin form, has the advantage of having a high product competitiveness by improving the shortening and yield of the assembly process.

Hereinafter, with reference to the accompanying drawings 1 to 21 will be described in detail a preferred embodiment according to the present invention. Note that the same components in the drawings are represented by the same reference numerals and symbols as much as possible even if shown in different drawings. In addition, in describing the embodiments of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. First, referring to FIG. 1, a liquid crystal display according to an exemplary embodiment of the optical device according to the present invention will be described.

It includes a light source 100 and a light guide plate 200 installed to one side of the light source 100. The light guide plate 200 is responsible for guiding and emitting light incident from the light source 100. Therefore, the lower surface of the light guide plate 200 may be processed into a predetermined microstructure for the desired light reflection. In addition, a reflector may be further provided below the light guide plate 200. In this embodiment, the light source 100 is described as an example of being positioned on the side of the light guide plate 200, but the present invention is not limited thereto and may be realized in a direct manner.

An integrated optical sheet 300 may be installed in the light exit direction of the light guide plate 200, and a prism sheet 400 may be installed in the light exit direction of the integrated optical sheet 300. In addition, the liquid crystal display panel 500 may be formed in the light output direction of the prism sheet 400 to configure one liquid crystal display device.

As shown in detail in FIG. 2, the integrated optical sheet 300 includes a light collecting part 330 formed on a surface facing the light guide plate 200 and having a plurality of downward prism elements 331 extending in one direction. It is formed on the emission direction surface and includes an anisotropic diffusion portion 310 for diffusing light. A plurality of scattering elements may be formed between the plurality of prism elements 331 as shown in FIG. 3 to prevent luminance unevenness. Referring to FIG. 4, when there is no scattering element on the left side, the luminance unevenness is revealed in appearance. When the light is scattered with the scattering element, luminance uniformity can be achieved as shown on the right side. Therefore, the scattering element 332 need not be provided where the appearance is not important and the brightness needs to be realized. However, the scattering element 332 may be provided where the luminance unevenness does not appear. In this case, the height L2 of the scattering element 332 formed between the downward prism elements 331 of the light collecting part 330 should be smaller than the height L1 of the downward prism element 331. It is preferable to form less than / 2. If the height of the scattering element 332 is greater than 1/2, it is most preferable that the scattering element 332 is formed to be 1/2 or less because it causes mutual interference with the downward prism element 331 and thus the functionality of scattering, which is the original purpose, is inferior. Do. According to the experimental results, as shown in FIG. 5, when the height of the scattering element 332 is 1/2 or less, the luminance is gradually decreased, but when it exceeds 1/2, the luminance is rapidly decreased. . From this, it can be seen that it is most preferable that the height L2 of the scattering element 332 is less than or equal to 1/2 of the height of the downward prism element 331 in order to prevent the reduction in overall luminance.

In addition, a plurality of optical lens patterns 320a and 320b are further formed on each of the light collecting parts 330 and the anisotropic diffusion part 310 to collect and scatter incident light at predetermined angles.

In FIG. 2 of the present exemplary embodiment, an integrated optical sheet 300 having optical lens patterns 320a and 320b formed on both surfaces thereof is illustrated, but the optical lens pattern may be formed on only one side thereof. That is, it may be formed only on the light collecting part 330 or only on the anisotropic diffusion part 310 or may be formed on both surfaces as shown in FIG. 2.

As shown in FIGS. 2 and 12, the optical lens patterns 320a and 320b have a circular shape in planar projection and are distributed in an embossed form at a predetermined interval from each other. It has an optical section in the form of a convex lens that protrudes upward in an arc shape that protrudes upward. The optical lens patterns 320a and 320b condense the light transmitted from the light source 100 from the pattern surface formed by the arc surface and scatter it in all directions as indicated by arrows in the drawing. It is possible to control the size, structure and spacing of the optical lens patterns (320a, 320b) when manufacturing the (300).

 As described above, the light collecting part 330 having the downward prism element 331 is formed on one surface of the optical sheet 300, and the anisotropic diffusion part 310 for diffusing the concentrated light through the light collecting part 330 is formed on the other surface of the optical sheet 300. And by forming the optical lens patterns (320a, 320b) in each of the light collecting portion 330 and the anisotropic diffusion portion 310 to integrate the conventional diffusion film and the prism film, it is possible to implement a thin optical sheet. A light transmitting base portion (not shown) may be further provided between the light collecting portion 330 and the anisotropic diffusion portion 310, which is provided with a light collecting portion on one side and an anisotropic diffusion portion on the other side thereof. This is because it is possible to provide.

A plurality of lenticulars are formed in the other direction as an optical element for diffusion on the upper surface of the anisotropic diffuser 310, and may be formed in a semi-circular column shape 312 as shown in FIGS. 2 and 3.

In the following description, the lenticular is formed in a semicircular column shape 312 as an example. In FIG. 6, an intaglio lenticular is illustrated and described. However, in the case of an intaglio lenticular, the present invention is understood to include both an intaglio or an intaglio lenticular.

The plurality of downward prism elements 331 of the light collecting part 330 and the lenticular 312 of the anisotropic diffusion part 310 are formed to be perpendicular to each other, for example, but are not limited thereto. That is, the direction of the downward prism element 331 and the lenticular 312 may be formed to have a cross angle that is not perpendicular to each other.

The lenticular 312 of the anisotropic diffuser 310 is provided in a circular hemispherical shape or a circular semi-cylindrical shape. As shown in FIG. 6, the amount of light diffusion may be adjusted by changing the R value of the lenticular. The experimental results measured by changing the R value are shown in FIG. 7.

7 shows a percentage of the reference luminance value of the integrated sheet 300 by changing the value of R while fixing the pitch P at 50 μm and the depth D at 25 μm.

As shown in FIG. 7, it can be seen that the luminance value is significantly increased and changed when the R value of the circle having a radius of 32 um is applied to the lenticular, and then the luminance value is gradually increased as the R value is made smaller and sharper. It can be seen. In summary, when the ratio of the R value to the pitch P is 0.65 or less, it can be seen that a significant brightness enhancement effect can be obtained.

In the above description, the anisotropic diffusion portion is formed by the lenticular as an example, but is not limited thereto, and the anisotropic diffusion portion may be implemented by the formation of a leaf pattern, a scratch, etc., which may exhibit anisotropy. The leaf-shaped optical element has an elliptical shape having a long axis and a short axis, and an embossed shape having a height lowered toward both ends, that is, the edge of the short axis, about the center of the long axis. In the present example, but is made of an embossed example, it is also possible to form intaglio grooves. The leaf-shaped optical element has a ratio of long and short axes of 1.5: 1 to 50: 1, each of which has a length of 1 to 5000um and 1 to 100um and a height of 0.2 to 200um. Do.

FIG. 8 shows the output light by separately separating only the anisotropic diffuser 310 of the integrated sheet 300 and projecting the light. When the luminance of the incident light is 100, the points where the luminance of 50% or more is distributed are connected. In this case, as shown in FIG. 9, the emission light distribution having a substantially elliptical shape is obtained. When the R value of the lenticular 312 of the anisotropic diffuser 310 is changed, the long-length ratio of the elliptical is measured, as shown in Table 1 below.

TABLE 1

Division (R) 35 34 33 32 31 30 29 28 27 26 25 ratio 1.4: 1 1.45: 1 1.7: 1 2.04: 1 2.21: 1 2.3: 1 2.4: 1 2.84: 1 3: 1 3.4: 1 3.6: 1

Such a test is performed through a general viewing angle measuring device, and the emitted light distribution obtained through the viewing angle measuring device has the shape of an ellipse having a long axis and a short axis. The direction of the short axis is formed in the lenticular extending direction of the integrated sheet 300, the direction of the long axis is formed in the vertical direction of the lenticular extension direction of the integrated sheet 300. In particular, when the ratio between the long axis and the short axis of the anisotropic diffuser is 2: 1 or more, the brightness enhancement effect becomes prominent. In the long-to-short ratio 2: 1, the R value of the lenticular corresponds to 32 μm, which corresponds to the ratio of R value to pitch to 0.65. That is, when the ratio of the R value with respect to the pitch of the anisotropic diffused part in which the lenticular is formed is 0.65 or less, good front luminance can be obtained. When generalizing the above results for anisotropic diffusion parts without lenticular, that is, anisotropic diffusion parts produced by leaf pattern formation or unidirectional scratch formation, the ratio of the long axis and the short axis of the emitted light distribution is 2: 1 or more. Good front luminance can be obtained.

Meanwhile, a scattering element 313 may be further formed between the lenticulars 312 of the anisotropic diffusion 310 as shown in FIG. 10. The scattering element 313 is to prevent the luminance non-uniformity from appearing in appearance as shown in FIG. 4. The scattering element 313 as shown in FIG. 10 may be formed by a mold or roller having a sanding, blasting or scratching surface, and the technical concept thereof will be apparent to those skilled in the art, and thus a detailed description thereof will be omitted.

On the other hand, when the prism sheet is disposed on the optical sheet as described above to configure the optical device, the prism element extending direction of the prism sheet is arranged perpendicular to the first direction which is the extending direction of the downward prism element, or is an anisotropic diffusion portion. It is preferable to arrange | position in the 2nd direction which is a short axis direction.

Each of the optical lens patterns 320a and 320b is formed on the light exit surface of each anisotropic diffuser 310 and the light incident surface of the light converging unit 330, and each of the lenticular 312 and the downward prism element ( 331 is formed along the pattern surface of the optical lens patterns 320a and 320b. Accordingly, the lenticular 312 and the downward prism element 331 positioned in the upper region of each of the optical lens patterns 320a and 320b may have patterns of the optical lens patterns 320a and 320b as shown in FIGS. 11A and 11B. Corresponding to the plane has a curved shape having a relatively high peak and a low peak. The heights of the lenticular 312 and the downward prism element 331 are light scattered from the optical lens patterns 320a and 320b while minimizing wet-out by minimizing optical defects observed by the human eye. Can be refracted in a substantially vertical direction.

On the other hand, the optical sheet 300 according to the present invention, as shown in Figs. 12 and 13, the optical lens patterns 320a, 320b are spaced apart from each other with an ellipsoidal or polygonal upwardly projecting convex lens shape in planar projection. 14 to 17, it may be formed in a concave lens-shaped embossed shape having a circle, an ellipse, a polygonal shape and recessed down in cross section as shown in FIGS. 14 to 17.

The lenticular 312 may have an optical cross section having a partial arc shape as shown in FIG. 18, but may have various widths. As shown in FIG. 19, an optical cross section having a partial arc shape is illustrated. And a triangular optical cross section may be formed in a convexly complex shape.

In addition, as shown in FIGS. 20 and 21, the optical lens patterns 320a and 320b may be formed at irregular intervals regardless of a circle shape, an ellipse shape, or a polygonal shape in planar projection.

The optical sheet 300 according to the present invention having such a structure is refracted by the light emitted from the light source 100 in the vertical direction to enter the panel 500, thereby increasing the luminance in the entire area of the panel 500. . Therefore, high brightness can be exhibited even at a wide viewing angle. Since each of the lenticular 312 and the downward prism element 331 is formed along the pattern surface of the optical lens patterns 320a and 320b to form a structure having a relatively high peak and a relatively low peak, the human eye The optical coupling with adjacent films observed can be minimized. As a result, the wet-out phenomenon is minimized and the moire fringe does not occur.

In addition, even when fine dust and scratches are generated in the optical sheet 300 by the light scattered from each of the optical lens patterns 320a and 320b, the optical sheets 300 may not be visually observed. Therefore, productivity of the optical sheet 300 is improved by the defect rate reduction and the workability improvement. As such, by providing an optical film in which a plurality of lenticulars 312 and downward prism elements 331 are linearly arranged along the pattern surfaces of the optical lens patterns 320a and 320b of the embossing type having an optical cross section capable of controlling light. The present invention provides an optical film capable of exhibiting high brightness at a wide viewing angle, removing moiré by preventing infiltration, and improving productivity.

One embodiment of the present invention described above should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

1 is a schematic exploded perspective view of a liquid crystal display device according to an embodiment of the optical device of the present invention;

2 is a detailed view of the optical sheet of FIG.

3 is a view for explaining a scattering element formed between the downward prism element

4 is a view for explaining a difference depending on the presence or absence of scattering elements shown in FIG.

5 is a view for explaining a luminance change according to the height of the scattering element shown in FIG.

6 is a view for explaining in detail the lenticular shown in FIG.

7 is a view for explaining a luminance change according to the change of the R value of the lenticular of FIG.

FIG. 8 is a view showing the emitted light of FIG. 2 and the anisotropic diffuser shown in FIG.

9 is a distribution diagram of FIG. 8.

10 is a view for explaining a lenticular according to another embodiment of the present invention.

FIG. 11A is a cross-sectional view taken along line AA ′ of FIG. 2, and FIG. 11B is a cross-sectional view taken along line BB ′ of FIG. 2.

12 and 13 illustrate another embodiment of the convex optical lens pattern.

14 is a diagram for explaining an embodiment of a concave optical lens pattern.

15A is a cross-sectional view taken along line C-C 'of FIG. 14, and FIG. 15B is a cross-sectional view taken along line D-D' of FIG. 14.

16 and 17 are views for explaining another embodiment of the concave optical lens pattern.

18 and 19 are cross-sectional views illustrating an optical sheet according to another embodiment of the present invention.

20 and 21 are views for explaining the arrangement of the optical lens pattern according to an embodiment of the present invention.

22 is a schematic exploded perspective view for explaining a conventional liquid crystal display device.

Claims (21)

A light collecting part including a plurality of prism elements extending in a first direction; And, An anisotropic diffuser having a plurality of optical elements extending in a second direction different from the first direction on a surface opposite to a surface on which the prism element is formed; A plurality of optical lens patterns are formed on at least one of the surface on which the prism element is formed and the surface on which the optical element is formed. The optical sheet of the anisotropic diffusion part has a short axis direction of the emitted light distribution diagram coinciding with the second direction, and a long-to-short ratio of the emitted light distribution diagram is 2: 1 or more. The method of claim 1, And the second direction is perpendicular to the first direction. delete The method of claim 1, And the optical element of the anisotropic diffuser is a lenticular. 5. The method of claim 4, The lenticular is an optical sheet having an R value of 0.65 or less relative to a pitch. 5. The method of claim 4, The lenticular is a circular hemispherical or circular semi-cylindrical optical sheet. The method of claim 1, The optical sheet further comprises a translucent base portion between the light collecting portion and the anisotropic diffusion portion. The method of claim 1, The optical lens pattern, Optical sheets, characterized in that distributed in the form of embossing at a predetermined interval from each other. The method of claim 8, The optical lens pattern, It has a shape of at least one of circular or oval shape or polygonal shape in the plane projection, An optical sheet comprising a convex shape protruding upward in a partial arc shape in a cross-sectional projection, a concave shape recessed downward in a partial arc shape, or a combination of a convex shape and a concave shape. The method of claim 8, The optical lens pattern, Optical sheet, characterized in that formed at equal intervals or irregular intervals. The method of claim 8, The optical lens pattern, An optical sheet comprising a polygonal shape or a partial arc shape in cross-sectional projection or a complex shape of the polygonal shape and the partial arc shape. A light guide plate having a light exit surface; A light collecting part including a plurality of prism elements disposed in a light output direction of the light guide plate and extending in a first direction and having a directivity; And an anisotropic diffusion portion in which a plurality of optical elements extending in a second direction different from the first direction are formed on a surface opposite to a surface on which the prism element of the light collecting portion is formed, wherein the surface on which the prism element is formed and the optical element are An optical sheet having a plurality of optical lens patterns formed on at least one surface thereof; And A prism sheet disposed on the optical sheet, And the anisotropic diffusion portion has a short axis direction of the emitted light distribution diagram coinciding with the second direction, and a long-to-short ratio of the emitted light distribution diagram is 2: 1 or more. The method of claim 12, And the second direction is perpendicular to the first direction. The method of claim 12, And a prism element extending direction of the prism sheet is perpendicular to the first direction. The method of claim 12, And a prism element extending direction of the prism sheet is the second direction. delete The method of claim 12, The optical lens pattern, Are distributed in the form of embossing at a predetermined interval from each other, An optical device, characterized in that the linear arrangement at a predetermined interval from each other. The method of claim 12, The optical lens pattern, It has a shape of at least one of circular or oval shape or polygonal shape in the plane projection, An optical device comprising a convex shape protruding upward in a partial arc shape in a cross-sectional projection, a concave shape recessed downward in a partial arc shape, or a combination of a convex shape and a concave shape. The method of claim 12, The optical lens pattern, The optical device, wherein the optical section has a convex shape projecting upward in the projection of the cross section, a concave shape recessed downward, or a combination of the convex shape and the concave shape. The method of claim 12, The optical lens pattern, Optical device, characterized in that formed at equal intervals or irregular intervals. The method of claim 12, The optical lens pattern, And a polygonal shape or a partial arc shape in cross-sectional projection, or a complex shape of the polygonal shape and the partial arc shape.

Images