KR20140086706A - Patterned glass having high transmittance - Google Patents

Abstract

Disclosed is a patterned glass having high transmittance which includes a plurality of geometric patterns on a glass surface, and provides patterns, bottom surface size of the pattern, pattern height, and gap between the patterns which increase transmittance through optical scattering and collection effects, thereby being formed in an embossing or engraving form. Such patterned glass having high transmittance provides the patterns, bottom surface size of the pattern, pattern height, and gap between patterns which increase transmittance through optical scattering and collection effects, thereby increasing visible ray transmittance (Tvis) and solar energy transmittance (Te); therefore, efficiency of a solar battery, a solar collector, and the like can be increased.

Description

{PATTERNED GLASS HAVING HIGH TRANSMITTANCE}

The present invention relates to a patterned glass, and more particularly to a patterned glass having a high transmittance which can be used for a solar cell, a solar collector, and the like.

Generally, the use of the patterned glass is not particularly limited, but can be widely applied to solar cells, solar collectors, and the like. This patterned glass is produced using a roll-out method in which a pattern is embossed or embossed on the surface of a roller in contrast to a float method of producing a plate glass. The patterned glass has a function of improving the visible light transmittance (Tvis) and the solar transmittance (Te) compared with the general plate glass due to the scattering and trapping effect of the light due to the pattern of the glass surface.

US Patent Publication No. 20100051093 discloses a patterned glass characterized in that a wave or a pattern of a crescent moon forms a group of squares or squares. However, the patterned glass of the above-mentioned shape has a weak point that the glass can be easily broken by a wave or crescent-shaped pattern, so that it is not suitable to be applied to a solar cell or a solar collector requiring durability and resistance to wind pressure, So that the light scattering and trapping effect deteriorates.

In addition, U.S. Patent Publication No. 20110011445 discloses a patterned glass which can be applied to a solar cell and a patterned glass characterized by convex pattern of convex features by a method of manufacturing a photovoltaic device using patterned glass. However, in the patterned glass of the above-mentioned form, the degree of improvement of the transmission performance is low due to high effect of reflection of light due to the pattern of incident sunlight. This is not suitable for application to a solar cell or a solar collector requiring a high transmittance.

The present invention is to provide a high transmittance patterned glass capable of improving light transmittance through light scattering and collecting effects.

The present invention relates to an image display device having a plurality of geometric patterns on at least one glass surface and having a pattern shape for increasing the light transmittance through scattering and collecting effects of light, a pattern bottom size, a pattern height, A high transmittance pattern glass is formed.

Also disclosed is a high transmittance patterned glass characterized in that the underside of the pattern has a polygonal, circular, elliptical or curvilinear shape.

Also disclosed is a high transmittance patterned glass characterized in that the underside of the patterned shape is diamond-like, square, triangular or circular.

Further, the size of the underside of the pattern having the diamond shape is 0.3 to 1.2 mm in width and 0.6 to 1.8 mm in length.

Further, the size of the underside of the pattern having the quadrangle is 0.3 to 1.2 mm in width and 0.3 to 1.2 mm in height.

Further, the size of the underside of the pattern having the triangle has a length of one side of the base of 0.3 to 1.2 mm.

A high transmittance patterned glass is characterized in that the size of the underside of the pattern having the circular shape is 0.3 to 1.2 mm in diameter.

Also, the pattern height refers to a vertical distance from the bottom of the pattern to the apex of the pattern, and the pattern height has a length of 0.1 to 1.3 mm.

Also, the inter-pattern spacing means a distance from one side of the undersurface of the pattern to the opposite side of the adjacent pattern pattern in parallel thereto, and the interval between the patterns has a length of 0.1 to 1.1 mm Discloses a high transmittance pattern glass.

The high-transmittance patterned glass according to the present invention exhibits appropriate pattern shape, bottom size, pattern height, and inter-pattern spacing that can improve light transmittance through light scattering and trapping effects, thereby obtaining visible light transmittance (Tvis) and solar energy transmittance It is possible to increase the efficiency of a solar cell, a solar collector, and the like by increasing the amount Te of the solar cell.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a bottom surface size of a pattern of a high transmittance pattern glass according to a preferred embodiment of the present invention. FIG.
FIG. 2 is a diagram illustrating pattern height of a pattern of a high transmittance pattern glass according to a preferred embodiment of the present invention.
FIG. 3 is a view showing the spacing between the patterns of the high transmittance patterned glass according to the preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The high transmittance patterned glass according to a preferred embodiment of the present invention can be applied to a solar cell, a solar collector, a solar cell application product, a window of a building, a light diffusion device, a lighting, a condenser mirror, an interior window, and the like.

The high transmittance patterned glass of the present invention includes a plurality of geometric patterns on at least one glass surface, and the pattern shape may be polygonal, circular, elliptical or curved, but is not limited thereto. For reference, not all glasses having a pattern shape have a high light transmittance, but transmittance may be reduced through scattering or diffuse reflection of light depending on the distribution of the pattern shape, the size and shape of the pattern shape, Glass is not suitable for use in solar cells and solar collectors that require high transmission.

Therefore, in the present invention, a high transmittance pattern glass having an optimum pattern shape, a bottom size of a pattern, a pattern height, and a pattern spacing that increases a visible light transmittance (Tvis) and a solar energy transmittance (Te) It is suggested.

FIG. 1 is a view showing a bottom surface size of a pattern of a high-transmittance patterned glass according to a preferred embodiment of the present invention. FIG. 2 is a view showing a pattern height of a pattern of a high-transmittance patterned glass according to a preferred embodiment of the present invention. And FIG. 3 is a view showing the spacing between the patterns of the high transmittance patterned glass according to the preferred embodiment of the present invention.

As shown in FIGS. 1 to 3, in the present embodiment, the pattern shape of the patterned glass has a pyramid shape, and a shape having a curved bottom face such as a circular shape or an elliptic shape has a conical shape, The shape and size of the underside of the pattern constituting the pattern shape, the pattern height, and the spacing between the patterns have the following characteristics.

(a) The underside size of the diamond-shaped pattern is 0.3 to 1.2 mm in width and 0.6 to 1.8 mm in length, preferably 0.6 to 0.8 mm in width and 1,1 to 1,3 mm in height . The pattern height has a length of 0.1 to 1.3 mm, preferably 0.4 to 1.0 mm. Further, the interval between the patterns has a length of 0.1 to 1.1 mm, preferably 0.3 to 0.9 mm.

(b) The square bottom pattern has a width of 0.3 to 1.2 mm and a length of 0.3 to 1.2 mm, preferably 0.6 to 0.8 mm, and a length of 0.6 to 0.8 mm. . The pattern height has a length of 0.1 to 1.3 mm, preferably 0.4 to 1.0 mm. Further, the interval between the patterns has a length of 0.1 to 1.1 mm, preferably 0.3 to 0.9 mm.

(c) Triangle pattern The underside size is 0.3 to 1.2 mm on one side and 45 or more on the other side, preferably 0.6 to 0.8 mm, One of the angles formed by two sides is more than 60 degrees. The pattern height has a length of 0.1 to 1.3 mm, preferably 0.4 to 1.0 mm. Further, the interval between the patterns has a length of 0.1 to 1.1 mm, preferably 0.3 to 0.9 mm.

(d) The underside size of the circle-shaped pattern is 0.3 to 1.2 mm in diameter, preferably 0.6 to 0.8 mm in diameter. The pattern height has a length of 0.1 to 1.3 mm, preferably 0.4 to 1.0 mm. Further, the interval between the patterns has a length of 0.1 to 1.1 mm, preferably 0.3 to 0.9 mm.

Here, the underside size of the pattern represents the length (A, B), one side (E), or the length (F) of two sides (C, D) between opposing vertexes of the pattern shape as shown in FIG.

In addition, the pattern height represents the vertical distance (H) from the bottom of the pattern to the apex of the pattern shape as shown in the example shown in Fig.

Also, the interval between the patterns represents the vertical length (G) to one side of the bottom surface of two different patterns and the other side as shown in the example shown in FIG.

The high transmittance patterned glass of the present invention having the above structure is characterized in that the visible light transmittance (Tvis) and the solar transmittance (Te) are increased. When the underside size of the pattern is less than 0.3 mm, the size of the pattern is small and the diffused light is high, so that the amount of transmitted light is reduced. When the size of the underside of the pattern exceeds 1.2 mm, the scattering effect is low, It is not suitable for structures requiring transmission.

In addition, when the pattern height is less than 0.1 mm, the amount of collected light is low due to high reflection of light, and when the pattern height exceeds 1.3 mm, the contamination degree of the glass surface due to the external is increased and the transmittance is lowered.

In addition, when the interval between the patterns is less than 0.1 mm, the interval between the patterns is narrow, the density of the pattern is increased, and the durability and the wind-resistance of the glass are low, so that it is not suitable for use in a structure easily exposed to the outside. Is more than 1.1 mm, it is difficult to expect low reflection due to the pattern and improvement in light scattering.

In the present invention, when the pattern height is low, the transmittance is improved by providing a wide spacing between the patterns, and when the pattern height is high, the spacing between the patterns should be narrow to improve the transmittance. In addition, when the shape of the pattern is out of the above range, the visible light transmission (Tvis) and the solar energy transmittance (Te) are decreased. When the distance between the patterns is narrow and the density is high or the pattern height is high, the durability is low. It was not suitable for the use of a solar cell or a solar collector used outdoors.

In the present invention, the glass composition may contain 65 to 75 wt% of SiO2, 0 to 10 wt% of Al2O3, 10 to 18 wt% of Na2O, 0 to 5 wt% of K2O, 1 to 12 wt% of CaO, 0 to 8 wt% of MgO, 0 to 2 wt% Fe 2 O 3, and 0 to 2 wt% Sb 2 O 3. _{Preferably, SiO2 71.7%, Al 2 O} 3 1.1%, CaO 9.1%, MgO 3.7%, Na 2 O 13.9%, K 2 O 0.1%, SO 3 0.2% and Sb2O3 soda lime glass composition consisting of 0.2% And the shape of the pattern based on the same glass composition. The height of the pattern, and the spacing between the patterns.

Example

The optical properties were evaluated by processing the sample glass to a thickness of 4 mm and evaluating the properties using the following equipment.

The visible light transmittance (Tvis) in this experiment was measured according to ISO 9050: 2003 in the wavelength range of 380 to 780 nm.

In addition, solar transmittance (Te) was measured according to ISO 9050: 2003 in the wavelength range of 300 to 2500 nm.

Here, the visible light transmittance (Tvis) and the solar energy transmittance (Te) were measured according to each standard using a Perkinelmer Lambda 950 spectrophotometer.

In each of the examples and comparative examples, the shape of the pattern, the size of the bottom of the pattern, the height of the pattern, the spacing between the patterns, and the measured optical property values are shown in the following table. Here, the underside size of the pattern is represented by the length of the diamond in the case of a diamond or the square, the length of the diameter in the case of a circle, and the length of one side in the case of a triangle.

division Example Example Example Example Example Example One 2 3 4 5 6 Pattern shape Pattern shape Pyramid Pyramid Pyramid Pyramid Pyramid Pyramid Bottom Circle Triangle Square Diamond Circle Circle Bottom size
(mm) horizontal D: 0.7 D: 0.7 0.7 0.7 0.3 1.2 Vertical 1.2 Pattern height
(mm) 0.8 0.8 0.8 0.8 1.1 0.4 Spacing between patterns
(mm) 0.4 0.4 0.4 0.4 0.3 0.9 Optical property Visible light transmittance
(Tvis,%) 91.62 91.45 91.57 92.17 91.56 92.55 Solar energy transmittance
(Te,%) 90.90 90.72 90.78 91.25 90.58 91.59

division Example Example Example Example Example Example 7 8 9 10 11 12 Pattern shape Pattern shape Pyramid Pyramid Pyramid Pyramid Pyramid Pyramid Bottom Triangle Triangle Square Square Diamond Diamond Bottom size
(mm) horizontal 0.3 1.2 0.3 1.1 0.3 0.8 Vertical 0.3 1.1 0.7 1.3 Pattern height
(mm) 1.0 0.3 1.1 0.3 1.0 0.4 Spacing between patterns
(mm) 0.3 1.0 0.2 1.0 0.3 0.9 Optical property Visible light transmittance
(Tvis,%) 91.94 92.84 91.92 92.91 92.67 93.70 Solar energy transmittance
(Te,%) 90.87 91.86 90.94 92.03 91.71 92.75

division Comparative Example Comparative Example Comparative Example Comparative Example Comparative Example Comparative Example One 2 3 4 5 6 Pattern shape Pattern shape Flat Pyramid Pyramid Pyramid Pyramid Pyramid Bottom Circle Triangle Square Square Diamond Bottom size
(mm) horizontal - D: 0.2 1.5 0.1 0.86 0.7 Vertical - 0.1 0.86 1.2 Pattern height
(mm) - 0.7 0.8 0.7 0.7 0.4 Spacing between patterns
(mm) - 0.4 0.8 0.6 1.3 0.01 Optical property Visible light transmittance
(Tvis,%) 91.39 89.16 90.58 89.78 85.84 88.08 Solar energy transmittance
(Te,%) 90.49 89.23 89.98 88.95 85.67 87.88

division Comparative Example Comparative Example 7 8 Pattern shape Pattern shape Pyramid Pyramid Bottom Triangle Diamond Bottom size
(mm) horizontal 0.7 0.8 Vertical 1.3 Pattern height
(mm) 1.6 0.08 Spacing between patterns
(mm) 0.4 0.6 Optical property Visible light transmittance
(Tvis,%) 90.81 90.67 Solar energy transmittance
(Te,%) 90.21 90.08

In the above Tables 1 to 4, D represents the diameter of the bottom of the pattern having a circular shape, and the size of the bottom of the pattern having a triangle represents the length of one side.

As shown in Tables 1 and 2, the patterned glasses of Examples 1 to 12 satisfy the following conditions: a patterned shape, a patterned bottom size, a patterned height, It was confirmed that the visible glass transmittance (Tvis) and the solar energy transmittance (Te) were increased to be a pattern glass which can be used for a solar cell or a solar collector.

Comparative Examples 2 to 8 were prepared in the same manner as in Comparative Example 1 except that they were out of the range of the pattern height, the inter-pattern space and the bottom size, and were a general float glass having no visible light transmittance (Tvis) and solar energy transmittance (Te) .

In Comparative Examples 2 to 4, the pattern height and the spacing between the patterns were the same as in Example 1, but the visible light transmittance (Tvis) and the solar energy transmittance (Te) were out of the range of the pattern size, . When the pattern size is small, the scattering of the transmitted light is reduced due to the high diffuse reflection of light, and when the pattern size is large, the scattering effect of light is low and the amount of collected light is not sufficient for use in solar cells or solar collectors .

In Comparative Examples 5 to 6, the pattern height and the undersize size were the same as in Example 1, but the visible light transmittance (Tvis) and the solar energy transmittance (Te) were out of the range of the inter- . When the spacing between the patterns is narrow, the durability and windability of the patterned glass are lowered due to the high density of patterns, and the transmittance is lowered. When the interval between the patterns is wide, for the purpose of improving the light scattering due to the pattern and reducing the reflection It does not match.

Comparative Examples 7 to 8 were prepared in the same manner as in Comparative Example 1 except that the spacing between the patterns and the base size were the same as in Example 1 but the visible light transmittance (Tvis) and the solar energy transmittance (Te) . When the height of the pattern increases, the pollution of the glass surface is influenced by the influence of the outdoor climate and the pollution degree is high, thereby decreasing the transmittance. When the pattern height is low, the reflection of light is high, It is not suitable for use in a collector.

Accordingly, the high-transmittance patterned glass according to the present invention exhibits a proper pattern shape, a bottom size of a pattern, a height of a pattern, and a spacing between patterns to improve the light transmittance through scattering and trapping of light, By increasing the energy transmittance Te, the efficiency of solar cells, solar collectors, and the like can be increased.

While the present invention has been described in connection with certain exemplary embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the present invention. Further, the scope of the present invention is determined by the matters set forth in the claims, and the brackets used in the claims are not used for optional limitation, but are used for specific components, .

Claims (9)

Comprising a plurality of geometric patterns on at least one glass surface,
Characterized in that it is formed of embossing or embossing, which is composed of a pattern shape increasing the light transmittance through scattering and collecting effect of light, a size of undersurface of pattern, a height of pattern, and a spacing between patterns. The method according to claim 1,
Wherein the undersurface of the pattern has a polygonal, circular, elliptical or curvilinear shape. The method according to claim 1,
Characterized in that the undersurface of the pattern has a diamond shape, a square shape, a triangle shape or a circular shape. The method of claim 3,
Wherein the pattern bottom surface having the diamond shape has a width of 0.3 to 1.2 mm and a length of 0.6 to 1.8 mm. The method of claim 3,
Wherein the pattern bottom surface having the quadrangle has a width of 0.3 to 1.2 mm and a length of 0.3 to 1.2 mm. The method of claim 3,
Wherein the bottom side of the pattern having the triangle has a side length of 0.3 to 1.2 mm. The method of claim 3,
Wherein a size of the underside of the pattern having the circular shape is 0.3 to 1.2 mm in diameter. 8. The method according to any one of claims 1 to 7,
Wherein the pattern height refers to a vertical distance from a bottom of the pattern to a vertex of the pattern, and the pattern height has a length of 0.1 to 1.3 mm. 8. The method according to any one of claims 1 to 7,
Wherein the spacing between the patterns means a distance from one side of the undersurface of the pattern to the opposite side of the adjacent pattern in parallel thereto and the interval between the patterns has a length of 0.1 to 1.1 mm. Patterned glass.

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