KR101263808B1 - Illuminating member for reducing unified glare rating comprising air gap - Google Patents

Abstract

The present invention is formed on the lower surface of the diffusion layer, the partition layer forming an air gap; And a light collecting layer formed below the barrier layer and collecting a light passing through the air gap into a predetermined portion. As a result, UGR can be reduced by reflecting the light scattering largely left and right among the light applied through the diffusion layer to the air gap by using the surrounding partition wall surrounding the air gap. In addition, the light passing through the air gap may be collected in a downward direction by using the light collecting layer having the pattern, to further reduce UGR.

Description

ILLUMINATING MEMBER FOR REDUCING UNIFIED GLARE RATING COMPRISING AIR GAP}

The present invention relates to a lighting member, and more particularly, to a lighting member for UGR reduction that can reduce the UGR by using a partition layer and a light collecting layer.

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 luminaire according to the prior art consists of 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 fixture has a light that is directly transmitted to the light source unit 10 for emitting 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 110. The reason why the diffusion layer 110 is used at the outermost part of the lighting fixture is to reduce the hot spot of the light source 10 and to uniformly emit light. However, the diffusion layer 110 used in flat lighting removes only the hot spots, and as shown, the light at an angle indicated by the dotted line still causes discomfort to the human eye. This degree of discomfort is the UGR (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

Where L _Background Is the luminance of the background (the value does not include the influence of the light source),

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.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.

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.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a lighting member for reducing UGR, which can reduce UGR to 19 or less while removing hot spots.

The structure of the UGR reduction lighting member according to the present invention for solving the above problems is formed on the lower surface of the diffusion layer, the partition layer forming an air gap; And a light collecting layer formed under the barrier layer and collecting light passing through the air gap into a predetermined portion.

The barrier layer may have a structure in which the diffusion layer is patterned.

Alternatively, the partition layer may have a structure in which an air gap formed by patterning the light collecting layer is formed.

In addition, the air gap may be a structure connected to the outside of the illumination member for reducing the UGR.

On the other hand, the light refractive index of the light collecting layer is maintained at 1.0 or more, the light passing through the air gap can be refracted down the light collecting layer.

In addition, the diffusion layer or the light collecting layer may be in the form of a sheet or a substrate.

In particular, the light collecting layer may include: a body portion in which one surface of the barrier layer is in contact with the light collecting layer; And it may be composed of a pattern formed on the other surface of the body portion.

In this case, the pattern may be composed of one or more of a micro lens, a cylindrical lens, a prism lens.

According to the present invention, UGR can be reduced by reflecting light scattering largely to the left and right among the light applied through the diffusion layer to the air gap using the surrounding partition wall surrounding the air gap. In addition, the light passing through the air gap may be collected in a downward direction by using the light collecting layer having the pattern, to further reduce UGR.

1 is a cross-sectional view of a lighting fixture according to one embodiment of the prior art.
2 is a cross-sectional view of a lighting fixture according to another embodiment of the prior art.
Figure 3 is a graph showing the distribution of light distribution of the lighting fixture according to another embodiment of the prior art (intensity) for each angle.
4 is a cross-sectional view of a lighting member for reducing UGR having an air gap according to an embodiment of the present invention.
5 is a cross-sectional view showing the optical function of the UGR reduction illumination member is formed with an air gap according to an embodiment of the present invention.
6 is a light distribution distribution diagram of light passing through the UGR reduction lighting member having an air gap according to one embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an illumination member for UGR reduction according to a preferred embodiment will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

4 is a cross-sectional view of a lighting member for reducing UGR having an air gap according to an embodiment of the present invention. Referring to FIG. 4, the UGR reducing lighting member having an air gap according to an embodiment of the present invention includes a diffusion layer 110, a partition layer 120, a light collecting layer 130, and an air gap 40. . Specifically, the diffusion layer 110 may use a sheet or a substrate, and may be used by bonding the two together. In addition, a light collecting layer 130 is formed under the diffusion layer 110 with the partition layer 120 interposed therebetween, and the air gap 40 is surrounded by the side walls by the partition layer, and the diffusion layer 110 and the light collecting layer ( 130) is formed by sealing the upper and lower parts. Here, the partition layer 120 may be part of the diffusion layer 110 formed by patterning the diffusion layer 110 or may be part of the collection layer 130 formed by patterning the light collection layer 130. In addition, the components may be formed separately from the diffusion layer 110 and the light collection layer 130. In addition, the air gap 40 may be a closed space surrounded by the partition layer 120 all around, or may be in the form of a passage connected to the outside. For example, according to the cross section of the figure, the air gap 40 may be a structure without the outermost left and right partition wall layer 120 to be connected to the outside of the left and right, the passage so as to be connected to the outside of the front, rear It may be in the form of a structure.

In addition, the light collecting layer 130 collects the light passing through the air gap 40 to a predetermined portion to be illuminated. To this end, the light collecting layer 130 may be formed of a body portion 130a in contact with the partition layer 120 and a pattern 130b formed on the other surface of the body portion 130a. The body portion 130a may use a sheet or a substrate, and may be used by bonding the two. The pattern 130b may be in the form of a micro lens array as in the left side, or may be in the form of a prism as in the right side. In addition, in addition to the cylindrical lens can be formed by a single or mixed. The shape of the pattern 130b collects light and at the same time serves to adjust the numerical value of UGR by refracting the light passing through the air gap 40 once again. 5 shows the principle that the optical functions of the air gap 40, the partition layer 120, and the light collecting layer 130 operate.

5 is a cross-sectional view showing the optical function of the UGR reduction lighting member according to an embodiment of the present invention. Referring to FIG. 5, light emitted from the light source layer 10 mounted in the luminaire 30 passes through the diffusion layer 110 and light to be refracted as an arrow enters the light collecting layer through the air gap 40. In this case, light passing through the air gap 40 may pass through only the air gap 40 to be incident on the light collecting layer 130, or may be reflected by the partition layer 120 to be incident on the light collecting layer 130. . Specifically, light that is highly refracted downward through the air gap 40 past the diffusion layer 110 or light that is not significantly refracted downward is applied to the air gap 40 at a distance from the partition layer 120. It is incident directly on the light collecting layer 130. On the other hand, the light that is not highly refracted in the downward direction of the air gap 40 is reflected by the partition layer 120 is incident on the light collecting layer 130. Here, the light that is not highly refracted downward is mostly light that affects the UGR, and as described above, passes through the diffusion layer 110 and is left-right, that is, between -90 ° and -45 ° based on 0 ° below the vertical. Light in the range of 20.3 and 20.9 between 45 ° and 90 °, respectively. The partition layer 130 serves to guide the light to the light collecting layer 130 by reflecting the light at such an angle so as not to leak to the outside.

As such, the light passing only through the air gap 40 and / or the light passing through the air gap 40 and reflected on the partition layer 120 at the same time comes into contact with the surface of the light collecting layer 130. The light is refracted down once again according to the pattern 130b). In this case, the refractive index of the light collecting layer 130 is preferably higher than the refractive index 1 of the air in the air gap 40 so that the light passing through the air gap 40 is refracted downward. Therefore, the lighting member of the present invention can satisfactorily reduce the glare by the partition layer 120 and by reducing the glare second through the light collecting layer 130, thereby satisfying a suitable UGR value. The light distribution of the final focused light is shown in FIG. 6.

6 is a light distribution diagram of light passing through the UGR reduction lighting member according to the embodiment of the present invention. Referring to FIG. 6, (a) is a light distribution distribution diagram of light passing through the diffusion layer 110 when only the diffusion layer 110 is used according to the related art. In addition, (b) is the light distribution distribution diagram of the light which passed the diffusion layer 110, the air gap 40, and the light condensing layer 130, when the illumination member which concerns on this invention is used.

Referring to (a), it can be seen that there is a portion of the light distribution distribution that exceeds 60 ° to the left and right. The calculated UGR value is 20.3 and 20.9 left and right, respectively, exceeding the appropriate value of 19. Meanwhile, referring to (b), the portion exceeding 60 ° to the left and the right of the light distribution distribution is significantly reduced compared to (a), and it can be seen that the light collected vertically increases. The calculated UGR values are 17.9 and 18.5 left and right, respectively, below the appropriate UGR value of 19. Therefore, when using the member for a lighting fixture according to the present invention, as well as reducing the hot spot, it is possible to meet the specifications of the appropriate UGR value without the need to increase the size of the overall lighting fixture or to deepen the ceiling.

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 spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

10: light source 20, 30: luminaire
40: air gap 110: diffusion layer
120: partition layer 130: light collecting layer
130a: body 130b: pattern

Claims (8)

In the lighting member for UGR reduction,
A barrier layer formed on a lower surface of the diffusion layer and forming an air gap; And
Is formed below the barrier layer, and includes a light collecting layer for collecting the light passing through the air gap into a predetermined portion,
The refractive index of the light collecting layer is 1.0 or more,
The partition layer is formed by a pattern formed by patterning the diffusion layer,
The pattern consists of one or more of a micro lens, a cylindrical lens, a prism lens,
The air gap is UGR reduction lighting member connected to the outside of the UGR reduction lighting member.
delete delete delete delete The method of claim 1,
The diffusion layer or the light collecting layer is a UGR reduction lighting member is formed an air gap which is a sheet or a substrate.
delete delete

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