KR20130044546A - Illuminating member for reducing unified glare rating - Google Patents

Abstract

PURPOSE: An illumination member for USG(Unified Glare Rating) reduction is provided to improve optical efficiency by forming a collimation layer and a diffusion layer. CONSTITUTION: An air plate(200) includes an air region(220). The air region includes an air layer inside. A micro lens layer includes a lens pattern. The lens pattern is integrally formed with an upper plate of the air plate. A diffusion layer is formed in a lower plane of the air plate.

Description

ILLUMINATING MEMBER FOR REDUCING UNIFIED GLARE RATING}

The present invention relates to a lighting member, and more particularly, to a lighting member for reducing UGR that can reduce the UGR.

Illumination is an action or function that uses various light sources, illuminates a specific place for any purpose, and is widely used to brighten the environment at night or in a dark place.

1 is a cross-sectional view of a lighting fixture according to one embodiment of the prior art. Referring to FIG. 1, a lighting device according to the related art includes a light source 10 and a luminaire 20. The light source may be an incandescent lamp, an LED, a CCFL, or the like, and the luminaire 20 uses a louver (or a reflector). Such a lighting device has a light that is directly transmitted to the light source unit 10 that emits light. As shown in FIG. 1, the angle of light indicated by the dotted line is transmitted to the person, causing visual discomfort.

Therefore, to prevent direct light, install a louver (or reflector) to block the light. However, such a structure requires a lot of installation cost and time because the overall size of the lighting fixtures are to be enlarged or the ceiling must be embedded deeper. In addition, since the light emitted from the light source 10 is not uniformly distributed, hot spots are concentrated. Recently, in order to reduce hot spots and to uniformly emit light, a diffusion layer is used for the outermost part of the lighting fixture, and a structure using such a diffusion layer is shown in FIG. 2.

2 is a cross-sectional view of a lighting fixture according to another embodiment of the prior art. Referring to FIG. 2, referring to FIG. 2, light emitted from a light source mounted on the luminaire 30 is emitted to the outside through the diffusion layer 40.

The reason why the diffusion layer 40 is used at the outermost part of the luminaire is to reduce the hot spot of the light source 10 and to uniformly emit light. However, the diffusion layer 40 used in flat lighting removes only hot spots, and as shown, light at an angle indicated by a dotted line still causes discomfort to the human eye. This unpleasant degree is the UGR value (Unified Glare Rating).

UGR was proposed by the CIE in 1987 as an integrated and practical method for evaluating unpleasant glare. In other words, UGR is a quantitative measure of the level of discomfort for people who use lighting.

Same as

이며, 여기서 A_P는 조명기구 발광부분의 면적이며, r은 관찰자에서 조명기구 발광면적 중심까지의 거리이다. UGR은 Einhorn과 Hopkinson 공식의 특성을 결합한 것이며 Guth의 위치 지수 (position index)를 포함하는데, 이것은 UGR이 글레어를 예측할 수 있는 실용성 있는 주요공식의 장점을 수용한 것이라 할 수 있다. 또한, 읽기, 쓰기, 수업, 및 컴퓨터 작업 등에 적합한 UGR 평가등급의 수치는 19 이하이다. 종래 기술에 따른 조명 기구가 이러한 적합한 UGR 수치를 만족하는지를 알아보기 위해, 도 2에 도시된 조명기구의 빛의 각도에 따른 밝기를 도 3에 나타낸다.Where L _Background Is the luminance of the background (the value does not include the influence of the light source), L is the luminance of the light emitting portion of the light source in the observer's field of view, ω is the solid portion of the light emitting portion of the light source in the observer's field of view, and p is the Guth position index of each light source. The solid angle ω is obtained from the light emitting area of the luminaire and the distance from the observer position to the luminaire. In other words,

Where A _P is the area of the luminescent light emitting part and r is the distance from the observer to the center of the luminescent light emitting area. UGR combines the characteristics of the Einhorn and Hopkinson formulas, and includes Guth's position index, which is the UGR's acceptance of the advantages of a practical key formula for predicting glare. In addition, the number of UGR ratings suitable for reading, writing, teaching, and computer work is 19 or less. In order to find out whether the luminaire according to the prior art satisfies such a suitable UGR value, the brightness according to the angle of light of the luminaire shown in FIG. 2 is shown in FIG. 3.

3 is a graph showing the light distribution of the luminaire according to another embodiment of the prior art in intensity for each angle. Referring to FIG. 3, the intensity of light within an angle of 60 ° or more is indicated by boxes on the left and right sides, such as a dotted line, based on the angle 0 ° perpendicular to the top and bottom through the diffusion layer. The values in these left and right boxes are proportional to the UGR values. Referring to the numerical value in the box, the UGR value of the luminaire on which the diffusion layer 110 is formed is derived from the values of 20.3 and 20.9 at left and right, that is, from -90 ° to -45 ° and 45 ° to 90 °, respectively.

Most indoor luminaires in use today use reflective shades or louvers or embed the entire luminaire to reduce the angle of light spreading over a wide range affecting UGR. However, in the above case, due to the louver or lampshade, landfill, etc., the size of the luminaire is increased, and the space for installation is large.

Therefore, according to the prior art, even if the diffusion layer is used, the effect of the hot spot can be reduced, but there is still a problem that is not suitable for the UGR standard of 19 or less.

Korea Patent Publication No. 10-0649641

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to control a UGR using an illumination member including an air layer (air region), improve light efficiency, and at the same time include a microlens pattern. In order to provide a lighting member having a light collecting layer and a diffusing layer, the process is simplified by not processing the diffusion layer or the light collecting layer to form an air filter, and can reduce the manufacturing cost by using a separate adhesive layer. .

As a means for solving the above problems, the present invention provides an air plate including an air region formed to include an air layer therein; A microlens layer including a lens pattern integrally formed with an upper surface of the air plate; And a diffusion layer formed on the bottom surface of the air plate.

In particular, in this case, the air region may be formed of at least two unit air regions formed in the air plate.

In addition, the unit air region may be implemented in a structure having an air pipe shape formed in a first direction or a second direction of the air plate.

In addition, the unit air region according to the present invention is divided into a support partition wall that is supported between the upper surface and the lower surface of the air plate, the shape of the cross section of the air pipe may have any one of circular, oval or polygonal. Can be.

The microlens layer may have the lens pattern formed by imprinting on an upper surface of the air plate.

In addition, the microlens layer of the above-described lighting member, the shape of the lens may be any one of the shape of a circle, ellipse, prism, lenticular, R-prism, pyramid, or may be combined more than one.

In addition, the diameter of the lens can be implemented in the range of 20㎛ to 100㎛.

In addition, the Sag of the lens may be implemented at 0.1 to 0.5.

In addition, the ratio of the area of the air region to the area other than the air region and the air region may be implemented in the range of 6: 4 to 9: 1.

In addition, the diffusion layer according to the present invention may be formed in a structure to coat the diffusion ink in close contact with the lower surface of the air plate, in this case, the diffusion layer, bead (buad) or bubbles are further included therein Can be.

In addition, the diffusion layer may be configured to further include a haze diffusion pattern formed on the opposite surface in contact with the body.

In addition, the illumination member, UGR (Unified Glare Rating) is preferably implemented in the range of 17 to 19.6, the body may be formed using any one of PC, PMMA and PET film.

In addition, the fill factor of the lens pattern may be implemented as 0.5 to 1.0.

According to the present invention, there is an effect to control the UGR by using a lighting member including an air layer (air region), and to improve the light efficiency.

In particular, the lighting member according to the present invention includes a light collecting layer and a diffusing layer including a microlens pattern, but the process is simplified by not processing the diffusing layer or the light collecting layer to form an air region, and does not use a separate adhesive layer. The manufacturing cost is reduced, and the separation problem of the component due to the weakening of the adhesive is realized.

1 and 2 are cross-sectional views of lighting fixtures according to embodiments of the prior art.
3 is a graph showing the light distribution of the luminaire according to another embodiment of the prior art in intensity for each angle.
4A to 4D are conceptual views for explaining an embodiment according to the present invention.
5 to 7 are main cross-sectional views of another embodiment of the lighting member according to the present invention.
8 and 9 show simulation results using the lighting member according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

4A to 4D are conceptual views illustrating main parts of the structure of the lighting member according to the present invention.

Referring to the drawings, the lighting member according to the invention is characterized in that it comprises a flat body and an air region formed to include an air layer inside the body. That is, when combined with the diffusion plate to be described later, it is a main point to provide an air region to adjust the UGR and the light efficiency according to the area of the air layer therein.

Looking at the implementation of such an air region, in the structure as shown in Figure 4a, a lens layer (hereinafter MLA), such as the diffusion layer 110, adhesive layer 120, micro lens array (MLA) layer 130 as an example For example, the lens layer may include a lens layer including various types of lens shapes, and an air region 40. An air gap 40 is formed between the diffusion layer 110 and the MLA layer 130, and this air region may be formed by patterning the diffusion layer 110 as shown in (a), and in (b). As illustrated, the MLA layer 130 may be patterned and formed. In addition, the MLA layer 130 collects the light passing through the air gap 40 to a predetermined portion to shine. Through this configuration, it is possible to reduce the UGR and increase the light efficiency.

However, in this case, the adhesive layer 120 is used to bond the diffusion layer 110 and the MLA layer 130. The use of the adhesive layer basically uses an expensive adhesive material or a film (PSA). While increasing the manufacturing cost, there is a disadvantage in that the separation reliability of the joint portion is reduced by weakening the adhesive force.

Accordingly, in the preferred embodiment of the present invention, as shown in FIG. 4B, the above-described air region is formed in a separate transparent plate (hereinafter, referred to as an 'air plate').

That is, a microlens layer including an air plate including an air region formed to include an air layer in the lighting member according to the present invention, a lens pattern integrally formed with an upper surface of the air plate, and a diffusion layer formed on a bottom surface of the air plate. It may be configured to include.

In this case, the air plate 200 forms a structure as shown in (a) of FIG. 4B, but has a structure capable of forming an air region 220 forming a predetermined space inside the body 210 having a plate shape. Will be provided.

That is, the air region 220 can control the area of the air region by forming a plurality of air pipes of the air passage structure as shown in (a) of FIG. 4B, and in this case, the upper and lower surfaces of the body An air pipe is formed between the surfaces in the first direction (horizontal direction) or the second direction (vertical direction) of the body. In this case, individual air pipes are defined as 'unit air areas'.

Formation of the unit air region, as shown in (a) of Figure 4b can be implemented in a regular shape of the air pipe, of course, can also be implemented by forming a space of air in an irregular shape. .

As an example of a structure for forming an air region in a regular shape, as shown in FIG. 4B, the unit air region 220 may have a square or rectangular cross section.

In addition, in the structure (b) of FIG. 4B, the structure is embedded in the body 210 of the unit air region 220, but may be formed in a structure in which a portion of the upper or lower surface is opened. to be.

In addition, as shown in FIG. 4C, the cross section of the unit air region 230 may have a circular shape, or may have a three-dimensional structure as shown in FIG. 4D. In any case, when the unit air regions 220 are formed, the structure of the support bulkhead is formed between the unit air regions 220.

Overall, the structure is provided with a body formed as a support partition wall on the upper and lower surfaces of the multi-layer plate, such a multi-layer plate can be manufactured by co-extrusion method, and the thickness and the area of the inner air passage is adjusted according to the mold shape Can be.

In addition, the ratio of the area of the air region and the body is more preferably to satisfy the range of 6: 4 to 9: 1.

5 to 7 is a cross-sectional conceptual view showing an embodiment of the lighting member according to the present invention.

5 and 6, the lighting member according to the present invention may further include a microlens layer 130 or a structure further including a diffusion layer 110. The diffusion layer 110 may be a sheet or a substrate, may be used by bonding the two. In addition, beads or bubbles 111 may be formed in the diffusion layer 110. An illumination member 200 according to the present invention is disposed between the diffusion layer 110 and the microlens layer 130. The diffusion layer, the microlens layer, and the body 210 of the illumination member are implemented to be stacked without using a separate adhesive material. In addition, the diffusion layer 110 may be implemented by coating a diffusion ink, and may further include a haze diffusion pattern 112 for diffusion of haze.

In addition, the microlens layer 130 collects the light passing through the air region of the body 210 of the lighting member according to the present invention to a predetermined portion to shine. To this end, the microlens layer 130 may also include a body portion 130a which is a portion in contact with the diffusion layer 110 and a microlens pattern 130b formed on the body portion. The body portion 130a may use a sheet or a substrate, and may be used by bonding the two. The micro lens pattern 130b collects light, and at the same time, refracts the light passing through the air region 210 to adjust the numerical value of the UGR.

In particular, referring to the structure shown in FIG. 7, the preferred embodiment of the microlens layer 130 according to the present invention, in addition to forming a separate microlens layer like the structure of Figures 5 and 6, the air The lens pattern may be integrally formed on the upper surface of the plate 200. That is, the lens pattern may be integrally formed through imprinting on the upper surface of the air plate 200.

In this case, the microlens layer 130 and the air plate 200 may be made of the same material, thereby improving optical characteristics and simplifying the process.

In this case, the lens of the microlens layer 130 may be embodied in the form of a lens having any one of a circle, an ellipse, a prism, a lenticular, an R-prism, a pyramid, or a combination thereof. The diameter of the lens is preferably formed in the range of 20㎛ to 100㎛. The fill factor of the lens pattern 124 is characterized by satisfying 0.5 ~ 1.0. In this case, the fill factor is defined as the ratio of the microlens pattern area per unit base substrate area. In addition, the present invention implements a fill factor (fill factor) of the micro lens pattern to 50% ~ 100% to reduce the UGR when transmitting the light source.

The size of the lens pattern is preferably in the range of 20 μm to 100 μm, and the Sag (height (H): lens diameter (R)) of the micro lens pattern is preferably in the range of 0.1 to 0.5. That is, the lighting member according to the present invention is applied to a lighting device including a light source, and can further reduce the UGR value in the above-described range. That is, in the case of a flat lamp among general lighting fixtures, only a diffuser plate is used to uniformly emit light while covering a light source. However, since it scatters light up to the direction of high UGR, glare occurs and the user's eyes are tired, which does not meet the standards of indoor lighting.

Therefore, in the present invention, the UGR is reduced by using an optical plate patterned with a micro lens array. In particular, the fill factor of the microlens pattern is tuned in the range of 0.5 to 1.0, and the sag of the microlens pattern is formed in the range of 0.1 to 0.25 or 0.5 to 0.5 to satisfy the UGR 19 or less. In particular, the present invention shows a result that the UGR is lowered by increasing the fill factor of the microlens pattern array in the same sag.

That is, the present invention has a feature that the UGR value can be further lowered by adjusting the fill factor at a sag of a specific value.

When the light passing through the air region 210 contacts the surface of the microlens layer 130, the light is refracted once again according to the microlens pattern 130b to collect light. In this case, the refractive index of the microlens layer 130 is preferably higher than the refractive index 1 of air in the air region 220 such that light passing through the air region 220 is refracted at a narrower angle. Therefore, the illumination member of the present invention can first reduce the glare by the air region 220, and by reducing the second glare through the microlens layer 130, it is possible to satisfy the appropriate UGR value.

8 and 9 show the results of the optical simulation using the lighting member according to the present invention. (UGR condition: X = 4 H, Y = 8 H, Reflectance grade (ceiling, wall, ground): 70/50 / 20%, luminaire size: 600mm * 600mm)

(a) is the result of using the laminated structure shown in FIG. 4a, and (b) is using the structure of the embodiment of FIGS. 5 to 7, when the ratio of the body and the internal air area is 95%, (c) the body The result when the ratio of the air area | region is 80% is shown.

Comparing the results, compared with the simple laminated structure of (a), in the structure having the air region according to the present invention, the UGR is controlled to the same level, and the result of improving the light efficiency can be obtained.

When using the lighting member according to the invention, the UGR (Unified Glare Rating) can be adjusted in the range of 17 to 19.6.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

110: diffusion layer
120: adhesive layer
130: microlens layer
200: air plate
210: body
220: unit air area

Claims (15)

An air plate including an air region formed to include an air layer therein;
A microlens layer including a lens pattern integrally formed with an upper surface of the air plate; And
A diffusion layer formed on the bottom surface of the air plate;
UGR reduction lighting member comprising a.
The method according to claim 1,
The air region,
UGR reduction lighting member formed of at least two unit air region formed inside the air plate.
The method according to claim 2,
The unit air region,
UGR reduction lighting member having an air pipe shape formed in the first direction or the second direction of the air plate.
The method according to claim 2,
The unit air region,
It is divided into a support bulkhead for supporting the upper surface and the lower surface of the air plate,
UGR reduction lighting member of the cross-sectional shape of the air pipe is any one of a circle, an ellipse or a polygon.
The method of claim 4,
The micro lens layer,
UGR reduction lighting member that the lens pattern is formed by imprinting on the upper surface of the air plate.
The method of claim 4,
The micro lens layer,
The shape of the lens has a shape of any one of a circle, ellipse, prism, lenticular, R-prism, pyramid, or a combination of one or more UGR reduction lighting member.
The method of claim 6,
The diameter of the lens is 20㎛ 100㎛ for reducing the UGR illumination member.
The method of claim 7,
Sag of the lens is a UGR reduction lighting member of 0.1 to 0.5.
The method of claim 4,
The air plate,
The ratio of the area of the air area and the area other than the air area is a UGR reduction lighting member of 6: 4 to 9: 1.
The method of claim 4,
The diffusion layer,
The UGR reduction lighting member is formed in a structure that is in close contact with the lower surface of the air plate to coat the diffusion ink.
The method of claim 4,
The diffusion layer,
UGR reduction lighting member further comprises a bead (bead) or bubbles therein.
The method of claim 4,
The diffusion layer,
UGR reduction lighting member further comprises a haze diffusion pattern formed on the opposite surface in contact with the body.
The method of claim 4,
Wherein:
An illumination member for reducing UGR, wherein the Unified Glare Rating (UGR) is 17 to 19.6.
The method of claim 4,
The air plate is UGR reduction lighting member formed using any one of PC, PMMA and PET film.
The method of claim 4,
UGR reduction lighting member having a fill factor of the lens pattern is 0.5 ~ 1.0.

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