KR20150143988A - Window member - Google Patents

Abstract

An invention relating to a window member is disclosed. The disclosed window member includes: a first transparent member, wherein the first transparent member is provided on the back surface of the incident surface and the incident surface to include a first pattern surface for retroreflecting or transmitting light according to the altitude of the sun .

Description

Window member {WINDOW MEMBER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window member, and more particularly, to a window member capable of reducing energy by allowing light to be retroreflected or transmitted according to the altitude of the sun.

Glass is a familiar material that has been used for a long time and is widely used as an important material for advanced electronic devices such as storage containers, glass for construction and transportation, and TVs, mobile phones and cameras.

On the other hand, in recent years, the skyscraper buildings of the city have been rapidly increasing. Especially, there are a lot of glass windows buildings which are considered the aesthetic sense of the building by utilizing the open feeling and various personality and functions.

The glass window gives a sense of openness based on its distinctive transparency, it produces a bright indoor lighting, a light and economical building, a wide variety of colors and functions to broaden the choice of design, maximize the characteristics of the building, Do.

Despite these many advantages, it has a large amount of radiant heat flow from solar heat and high heat loss due to high heat flow rate, resulting in increased cooling load in summer and increased heating load in winter This is a big drawback.

In recent years, there have been used various kinds of glass such as color glass, reflective glass, Roy glass, double-layer glass, or composite functional glass in which the functions of these products are combined.

On the other hand, in the domestic registered patent No. 1097923 (registered on December 16, 2011), "energy saving functional window" is disclosed.

An object of the present invention is to provide a window member having an energy saving function capable of reducing the illumination load by allowing light to be retroreflected or transmitted according to the altitude of the sun, and indirect natural light of the light being appropriately introduced.

Another object of the present invention is to provide an environmentally friendly window member by reducing the amount of light reflected toward the ground or a side building, thereby reducing the light reflection of the glass fixed structure and reducing the heat island of the urban heat island.

The window member according to the present invention includes: a first transparent member, the first transparent member being provided on an incident surface and a back surface of the incident surface, the first window having a first pattern for retroreflecting or transmitting light according to the altitude of the sun Plane.

The first pattern surface may be formed by a pattern consisting of a first total reflection surface, a second total reflection surface connected to the first total reflection slope, and a first connection surface connected to the second total reflection slope. do.

An angle formed by the light incident from the plane with the normal of the plane and the normal of the plane is denoted by L _in , and the angle between the plane and the first plane of the first transparent member is denoted by n1, the refractive index of the external medium of the first transparent member is denoted by n3, And the angle between the first total slope surface and the second total slope surface is? 2, the first and second total reflection surfaces satisfy the following conditions.

Configuration conditions of the first total reflection surface:? ¹ > sin ^-1 (n1 / n3) -L _in

The second configuration of the total reflection surface ^{condition: sin -1 (n1 / n3)} + θ1 + L in <θ2 <130 °

Further, the light emitting device may further include a second transparent member disposed in parallel with the first transparent member.

In addition, a second pattern surface may be formed on the second transparent member so as to face the first pattern surface in parallel with the first pattern surface.

The second transparent member may have a second pattern surface formed to face the first pattern surface in parallel with a part of the first pattern surface, and the other of the second pattern surface is not parallel.

In addition, the incident light is retroreflected by the first transparent member, and the light incident on the incident surface is totally reflected by the first and second total reflection surfaces and transmitted through the incident surface. do.

In addition, a gap layer is provided between the first transparent member and the second transparent member.

The gap layer may be formed of vacuum or air, or may be provided with at least one of argon and krypton.

N1 > n3 and n2 > n3 when the refractive index of the first transparent member is n1, the refractive index of the second transparent member is n2, and the refractive index of the gap layer is n3.

The first transparent member and the second transparent member may be made of glass or plastic.

In addition, a reinforcing transparent member is provided on the outer sides of the first transparent member and the second transparent member.

The window member according to the present invention causes the light to be retroreflected or transmitted through the sun according to the altitude of the sun so that the light is retroreflected in the summer when the sun is high and the cooling load of the room is reduced, Reducing the lighting load, reducing the heating load during the low altitude of the sun and increasing the natural light performance, reduces the lighting load, thereby maximizing the energy savings in all seasons.

In addition, the present invention is eco-friendly because it can reduce the amount of light reflected toward the ground or a side building due to the reflex reflection angle, thereby reducing the light reflection damage of the glass fixed structure and the heat island of the urban heat island.

In addition, the present invention can reduce the manufacturing cost by a simple structure in which two or more total reflection surfaces are formed on one surface.

Further, according to the present invention, visibility is improved by the second pattern surface of the second transparent member formed in parallel with the first pattern surface of the first transparent member, so that the outside scenery can be observed or appreciated without distortion.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing an altitude change of an embodiment for explaining the principle of a window member according to the present invention. FIG.
2 is a cross-sectional view of a window member according to a first embodiment of the present invention.
3 is a view showing an optical path of a window member according to the first embodiment of the present invention.
4 is a cross-sectional view of a window member according to a second embodiment of the present invention.
5 is a view showing an optical path according to a sun altitude of a window member according to a second embodiment of the present invention.
6 is a view showing the principle of retroreflection of a window member according to a second embodiment of the present invention.
7 is a view showing an optical path of retroreflection of a window member according to a second embodiment of the present invention.
8 is a view showing a visibility correction of a window member according to a second embodiment of the present invention.
9 to 12 are views showing a modified example of the window member according to the second embodiment of the present invention.
13 is a graph showing the seasonal transmittance of the window member according to the present invention.

Hereinafter, an embodiment of a window member according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

2 is a cross-sectional view of a window member according to a first embodiment of the present invention, and Fig. 3 is a cross-sectional view of a window member according to a first embodiment of the present invention. Fig. 1 is a view showing an optical path of a window member according to an embodiment.

1 to 3, the window member 100 according to the first embodiment of the present invention includes a first transparent member 110. [

The first transparent member 110 has a characteristic that it makes recurrent reflection for light incident at a specific angle and transmits it for light incident at another angle.

Here, light incident at a specific angle refers to light that is to be retroreflected to the angle of light corresponding to the total reflection condition described later, and light incident to other ranges refers to light that is to be transmitted at an angle other than the total reflection condition.

The first transparent member 110 includes an incident surface 112 and a first pattern surface 115. The incident surface 112 is formed in a planar shape so that light incident from the outside is refracted and incident. The first pattern surface 115 is provided on the back surface of the incident surface 112 to retroreflect or transmit the light according to the altitude of the sun.

The first pattern surface 115 is repeatedly formed with two or more total reflection surfaces. 2, the first pattern surface 115 includes a first total reflection surface 116a, a second total reflection surface 116b formed continuously to the first total reflection surface 116a, a second total reflection surface 116b And a first connecting surface 117 formed continuously with the first connecting surface 117.

As shown in Fig. 1, the sun altitude of the lower limbs is about 70 degrees, and the sun altitude of the comrades is about 30 degrees. Therefore, as shown in FIG. 3, the incidence angle of the incident light is increased by the first and second total reflection surfaces 116a and 116b in the summer when the altitude of the sun is high, And is transmitted through the first and second total reflection surfaces 116a and 116b.

Here, total reflection is a phenomenon in which light is totally reflected at the interface when the incident angle is larger than the threshold value when the light travels from a medium having a large refractive index to a medium having a small refractive index. In general, when a medium having a high refractive index is moved to a medium having a low refractive index, a part of the medium is transmitted through the interface and a part of the light is reflected. However, when the angle of incidence is gradually increased, there is no light transmitted when a specific angle is exceeded, and all of the light is reflected at the interface. This is called total reflection, and the incident angle at this time is called the critical angle. Accordingly, when the incidence angle is greater than the critical angle, incident light is totally reflected by the first and second total reflection slopes 116a and 116b, and light incident on the first and second total reflection slopes 116a and 116b ). &Lt; / RTI &gt;

The angle formed by the refracted light from the plane and the normal of the plane is represented by L _in , and the angle between the plane and the first total reflection surface And the angle between the first total reflection slope surface 116a and the second total reflection slope surface 116b is? 2, the first and second total reflection surfaces 116b are configured to satisfy the following condition .

Configuration conditions of the first total reflection surface:? ¹ > sin ^-1 (n1 / n3) -L _in

The second configuration of the total reflection surface ^{condition: sin -1 (n1 / n3)} + θ1 + L in <θ2 <130 °

And n1 > n3.

The above formula shows the configuration of the first and second total reflection slopes 116a and 116b. The angle? 1 of the first total reflection slope 116a is determined with respect to the incident angle L _in of light, The angle &amp;thetas; That is, the angle of the first total reflection slope 116a is determined by the angle of the light to be retroreflected, and the angle of the second total reflection slope 116b is determined by the first total reflection slope 116a.

Hereinafter, a window member according to a second embodiment of the present invention will be described. FIG. 4 is a cross-sectional view of a window member according to a second embodiment of the present invention, FIG. 5 is a view showing an optical path according to a sun altitude of a window member according to a second embodiment of the present invention, 7 is a view showing an optical path of retroreflection of a window member according to a second embodiment of the present invention, and Fig. 8 is a view showing a retroreflecting principle of the window member according to the second embodiment Fig. 8 is a view showing the visibility correction of the window member according to the example.

For convenience of description, the same reference numerals are used for the same components as those of the first embodiment, and a detailed description thereof will be omitted.

Referring to FIGS. 4 to 8, the window member according to the second embodiment of the present invention includes a first transparent member 110 and a second transparent member 120.

The first transparent member 110 is the same as the first embodiment. That is, the first transparent member 110 has the incident surface 112 and the first pattern surface 115. The second transparent member 120 is provided on the rear side of the first transparent member 110. The second transparent member 120 includes an emission surface 122 and a second pattern surface 125. This prevents the first pattern surface 115 of the first transparent member 110 from being exposed to the outside have.

A second pattern surface 125 is formed on the second transparent member 120 so as to face the first pattern surface 115 of the first transparent member 110 in parallel. The first pattern surface 115 of the first transparent member 110 is formed by successively forming the first and second total reflection surfaces 116a and 116b and the first connection surface 117, The pattern surface 125 is formed so that all the surfaces thereof are parallel to the first pattern surface 115. That is, the second pattern surface 125 also includes two or more corresponding surfaces 126 and a second connecting surface 127.

A gap layer 130 is provided between the first transparent member 110 and the second transparent member 120. The gap layer 130 may include a first transparent member 110 and a second transparent member 120 spaced apart from each other by a predetermined distance and may be formed of a vacuum or air and may include at least one of argon and krypton It may be filled.

5, the light incident at a specific angle is retroreflected by the first transparent member 110. As a result, The reflex reflection is such that light incident on the incident surface 112 is totally reflected by the first and second total reflection surfaces 116a and 116b and is transmitted through the incident surface 112. [ The incident light is deflected through the first and second total reflection surfaces 116a and 116b and is transmitted through the second transparent member 120 to the inside and is emitted through the outgoing surface 122.

Light incident at a specific angle refers to light which is to be retroreflected to the angle of light corresponding to the total reflection condition described later, and light incident at another angle is light which is to be transmitted through another angle beyond the total reflection condition.

4, the refractive index of the first transparent member 110 is denoted by n1, the refractive index of the second transparent member 120 is denoted by n2, and the refractive index of the gap layer 130 is denoted by n2. N3 > n3, and n2 > n3.

6, the refractive index of the first transparent member is denoted by n1, the refractive index of the second transparent member is denoted by n2, and the refractive index of the interstitial layer is denoted by n3. An angle formed by the refracted light from the plane and the normal of the plane the first, the L _in, when the said plane and a between each of the first total reflection surface of the first total reflection surface of each of θ1, ranging from (116a) (116a) and the second total reflection surface (116b) θ2, The second total reflection facets 116a and 116b are configured to satisfy the following conditions.

Configuration conditions of the first total reflection surface:? ¹ > sin ^-1 (n1 / n3) -L _in

The second configuration of the total reflection surface ^{condition: sin -1 (n1 / n3)} + θ1 + L in <θ2 <130 °

As a result, as shown in FIG. 5, the incidence angle of the incident light becomes higher than the critical angle in the summer when the altitude of the sun is high. Therefore, the light is totally reflected by the first and second total reflection surfaces 116a and 116b, Is smaller than the critical angle, it can be transmitted through the first and second total reflection surfaces 116a and 116b.

8, a gap layer 130 is formed between the first pattern surface 115 of the first transparent member 110 and the second pattern surface 125 of the second transparent member 120, Since the one pattern surface 115 and the second pattern surface 125 are parallel to each other, the refraction angle is constant, so that distortion does not occur and visibility is improved.

The first transparent member 110 and the second transparent member 120 are made of glass or plastic. That is, the first and second transparent members may be made of the same material such as glass or plastic, and the first and second transparent members may be made of different materials.

9 to 12 are views showing a modified example of the window member according to the second embodiment of the present invention.

Referring to FIG. 9, a first transparent member 210 and a second transparent member 220 are formed side by side, and a gap layer 130 is provided therebetween. In this case, the first transparent member 210 and the second transparent member 220 are provided so as to incline at a predetermined angle, and the first pattern surface 215 formed only of the total reflection surface and the second pattern surface 225). Even if the number, shape, angle, and the like of the first pattern surface 215 and the second pattern surface 225 facing each other are changed, two total reflection surfaces are formed so as to retroreflect or transmit light incident according to the altitude of the sun.

Referring to FIG. 10, the second transparent member 320 may have a second pattern surface (not shown) formed to face the first pattern surface 115 of the first transparent member 110 in a direction parallel to the first pattern surface 115, 325 are formed. This is because the second pattern surface 325 is formed so as to be in parallel with one of the two total reflection surfaces of the first pattern surface 115 in the form of a mixture of a surface having a visibility and a surface having distortion, It can be formed not to be parallel to one total reflection plane. That is, parallel to the first total reflection slope surface 116a and not parallel to the second total reflection slope surface 116b.

11, the second transparent member 120 may be formed with flat front and rear surfaces.

12, a reinforcing transparent member 140 is further provided on the outer sides of the first transparent member 110 and the second transparent member 120. As shown in FIG. The reinforcing transparent member 140 may reinforce the mechanical properties of the window member 100 with a general window.

Hereinafter, the operation and effects of the window member 100 according to the first and second embodiments of the present invention will be described.

The window member 100 according to the first embodiment of the present invention comprises a first transparent member 110. The first transparent member 110 is composed of an incident surface 112 and a first pattern surface 115 formed on the back surface of the incident surface 112. The light incident from the outside by the first pattern surface 115 It can be retroreflected or transmitted depending on the altitude.

In this case, the refractive index of the first transparent member is denoted by n1, the refractive index of the external medium of the first transparent member is denoted by n3, the angle formed by the light refracted from the plane and the normal of the plane is denoted by L _in , And the angle between the first total reflection slope surface 116a and the second total reflection slope surface 116b is? 2, the first total reflection slope surface 116a satisfies? ¹ > sin ^-1 (n1 / n3 ) -L _in , and the second total reflection slope 116b is satisfied by satisfying sin ^-1 (n1 / n3) +? 1 + L _in <? At this time, n1> n3 must be satisfied.

As shown in FIG. 3, the incidence angle of incident light is different according to the altitude of the sun as shown in FIG. 3, and the light is totally reflected and retroreflected by the first and second front slopes 116a and 116b according to the incident angle, It can be. That is, in the summer when the altitude of the sun is high, the incidence angle of the incident light becomes larger than the critical angle, so that the total reflection is performed by the first and second total reflection surfaces 116a and 116b to reflex the light, thereby obtaining a Shading Coefficient ), And the solar heat gain coefficient (SHGC).

Thus, the cooling load of the room can be reduced, the indoor glare can be reduced, and the light reflection damage can be reduced. In addition, it reduces the heat island of the city, reflects natural light directly, and indirectly introduces natural light, thereby reducing the illumination load.

In the winter season where the altitude of the sun is low, since the incidence angle of the incident light is smaller than the critical angle in the winter season, it is transmitted through the first and second total reflection slopes 116a and 116b so that the Shading Coefficient (SC) The solar heat gain coefficient (SHGC) can be increased and the heating load can be reduced to reduce energy use.

In addition, natural lighting performance is enhanced, and illumination load is reduced.

FIG. 13 is a graph showing the seasonal transmittance of the window member 100 according to the present invention. In the winter, when the altitude of the sun is low, the transmittance is high, so that the heating load can be reduced and energy usage can be reduced. And in summer where the altitude of the sun is high, the transmittance is low, so that the cooling load can be reduced and the indoor glare can be prevented.

Meanwhile, the window member 100 according to the second embodiment includes the first transparent member 110 and the second transparent member 120.

That is, unlike the first embodiment, as shown in FIG. 4, the first pattern surface 115 of the first transparent member 110 is not exposed to the outside by the second transparent member 120. Since the first pattern surface 115 is not exposed to the outside, it is possible to prevent a safety accident due to cleaning and a sharp surface.

A second pattern surface 125 is formed in the second transparent member 120 to correspond to the first pattern surface 115 of the first transparent member 110. The second pattern surface 125 is formed parallel to the first pattern surface 115 and the gap layer 130 is formed between the first pattern surface 115 and the second pattern surface 125.

The window member 100 according to the second embodiment In addition, the light incident from the outside by the first pattern surface 115 can be retroreflected or transmitted according to the altitude as in the first embodiment. In other words, the incoming light according to the altitude of the sun can be retroreflected or transmitted, so that it retroreflects the light during the summer season and transmits the light during the winter season (see FIG. 5).

4 and 6, the refractive index of the first transparent member 110 is denoted by n1, the refractive index of the second transparent member 120 is denoted by n2, the refractive index of the gap layer 130 is denoted by n2, Is n3, it is possible to satisfy n1 > n3 and n2 > n3.

When the refractive index of the first transparent member 110 is n1, the refractive index of the second transparent member 120 is n2, and the refractive index of the gap layer 130 is n3, light incident from the plane is refracted, when the angle is called L _in, for between each of the planar and the first total reflection surface (116a) is a leading angle θ1, the first total reflection surface (116a) and the second total reflection surface (116b) θ2, the first total reflection surface ( 116a) is ^{θ1> sin -1 (n1 / n3} ) satisfies -L _in, and the second total reflection surface (116b) is possible by satisfying ^{sin -1 (n1 / n3) +} θ1 + L in <θ2 <130 ° Do.

The specific effects are the same as those of the above-described first embodiment, and therefore, the detailed description has been superseded.

The window member 100 according to the second embodiment is improved in visibility by the gap layer 130 and the second pattern surface 125 formed in parallel with the first pattern surface 115. As shown in FIG. 8, the first pattern surface 115 and the second pattern surface 125 are formed in parallel to each other, so that the refraction angle is constant, distortion is hardly caused and visibility is improved, It is possible to appreciate or appreciate.

9 to 12 are views showing a modified example of the window member 100 according to the second embodiment of the present invention, and the second transparent members 220, 320 and 420 may be variously modified. That is, even if the number, shape, and angle of the first pattern surface 215 and the second pattern surface 225 are changed according to the installation state of the window member 100 as shown in FIG. 9, And can reflect or transmit the incident light according to the altitude of the sun.

As shown in FIG. 10, the second transparent member 320 is formed to face the first pattern surface 115 of the first transparent member 110 in parallel with the first pattern surface 115, A patterned surface 325 can be formed. This makes it possible to reduce the cost by facilitating the production of a mixture of a face having a visibility and a face having a distortion.

Also, as shown in FIG. 11, the second transparent member 420 may be a general window having front and rear surfaces formed flat. This is not parallel to the first pattern surface 115, so that visibility is poor. However, since a general window can be used, the manufacturing can be facilitated and the cost can be lowered.

12, a reinforcing transparent member 140 is formed on the outer side of the first transparent member 110 and the second transparent member 120 by using a bonding glass system using a transparent resin layer or an adhesive film or the like By attaching, mechanical properties can be reinforced. Thus, the stability and quality of the window member 100 can be improved.

As described above, the window member according to the present invention has a function of appropriately refracting or transmitting light to the window member, thereby reducing cooling and heating energy and lighting load on buildings, transportation means, etc., Reflection damage and urban heat island phenomenon can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

100: window member 110, 210: first transparent member
112, 212: incident surface 115, 215: first pattern surface
116a, 216a: first total reflection slopes 116b, 216b:
117: first connection surface 120, 220, 320, 420: second transparent member
122, 222: exit surface 125, 225, 325: second pattern surface
126, 226: corresponding surface 127: second connecting surface
140: reinforcing transparent member

Claims (12)

A first transparent member;
Wherein the first transparent member has an incident surface; And
And a first pattern surface provided on the back surface of the incident surface for retroreflecting or transmitting light according to the altitude of the sun.
The method according to claim 1,
Wherein the first pattern surface is constituted by a pattern consisting of a first total reflection slope, a second total reflection slope formed in succession to the first total reflection slope, and a first connection surface connected to the second total reflection slope absence.
3. The method of claim 2,
The refractive index of the first transparent member is n1, and the refractive index of the external medium of the first transparent member is n3;
When that is the light incident on the plane is refracted to normal and the angle of the plane L _in, for between each θ2 of the plane and the first total reflection surface of each of θ1, the second total reflection surface of the first and the total reflection surface leading , Wherein the first and second total reflection surfaces satisfy the following conditions.
Configuration conditions of the first total reflection surface:? ¹ > sin ^-1 (n1 / n3) -L _in
The second configuration of the total reflection surface ^{condition: sin -1 (n1 / n3)} + θ1 + L in <θ2 <130 °
3. The method of claim 2,
Further comprising a second transparent member disposed in parallel with the first transparent member.
5. The method of claim 4,
And a second patterned surface is formed on the second transparent member so as to face the first patterned surface in parallel with the first patterned surface.
5. The method of claim 4,
Wherein the second transparent member is provided with a second pattern surface which is formed so as to face a portion of the first pattern surface in parallel and the other of which is not parallel.
3. The method of claim 2,
The incident light is retroreflected by the first transparent member;
Wherein the reflex reflection is such that light incident on the incidence surface is totally reflected by the first and second total reflection surfaces and is transmitted through the incidence surface.
5. The method of claim 4,
And a gap layer is provided between the first transparent member and the second transparent member.
9. The method of claim 8,
Wherein the gap layer is formed of vacuum or air, or is provided with at least one of argon and krypton.
9. The method of claim 8,
N1 > n3, n2 > n3, where n1 is the refractive index of the first transparent member, n2 is the refractive index of the second transparent member, and n3 is the refractive index of the gap layer.
5. The method of claim 4,
Wherein the first transparent member and the second transparent member comprise glass or a plastic material.
5. The method of claim 4,
And a reinforcing transparent member is provided on the outer side of the first transparent member and the second transparent member.

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