JP2014238511A - Light control member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize incident light without complicating a structure, thereby suppressing energy consumption and the emission amount of carbon dioxide.SOLUTION: A light control member 1 includes a first area 5 having at least one first optical characteristic part 7 which is arranged along a light incoming face and reflects light incoming to a light incoming face in a direction different from a light incoming direction, and a second area 6 having a second optical characteristic part 8 which is arranged along the light incoming face and has an optical characteristic, including at least one of reflection, absorption, and deflection of, and light emission due to the light incoming to the light incoming face, different from that of the first optical characteristic part.

Description

  The present invention relates to a light control member that takes in incident light.

  The light control member controls the capturing of incident light, and can be used for various applications depending on its optical characteristics. For example, natural light can be effectively used for indoor indirect lighting by guiding natural light incident from a window to a ceiling or the like where natural light does not reach directly by a light control member that reflects or refracts light in the visible range. As a result, the use time of indoor lighting can be reduced, and the illumination intensity can be weakened. Therefore, it is considered that the consumption of carbon dioxide can be reduced and the energy consumption can be suppressed.

  For example, a technology is disclosed in which the blades of the blinds are made of a reflective material, and sunlight reflected by the blades is guided to the ceiling surface (see Patent Document 1).

  In addition, a technique is disclosed in which the angle of the prism portion of the prism sheet is optimized so that direct sunlight is collected as almost parallel light so that the shade portion can also be irradiated (see Patent Document 2).

JP 2002-106271 A JP 2010-67565 A

  The incident direction and the incident angle of sunlight vary depending on the direction of the window and the season, and also vary greatly depending on the daytime. For this reason, in order to enhance the daylighting effect, it is necessary to consider that the incident direction and the incident angle of sunlight change according to the season and time. Does not present effective measures.

  For example, in the case of Patent Document 1, all the blades of the blind are set in the same direction. When the incident direction and the incident angle of sunlight change, a human must manually change the direction of the blades. Is not good.

  In the case of Patent Document 2, an integrally formed prism sheet is used, and even if a plurality of prisms having different sizes and shapes are provided, it is possible to correspond to a wide range of incident directions and incident angles of sunlight. Can not.

  Therefore, when the techniques of Patent Documents 1 and 2 are used, even if a desired lighting efficiency is obtained for a certain limited season or time zone, the lighting efficiency is greatly reduced in other seasons or time zones. There is a risk.

  The present invention has been made in view of the above-described problems, and enables light efficiency to be improved with respect to incident light from a wide range, thereby enabling light control capable of suppressing energy consumption and carbon dioxide emission. A member is provided.

In order to solve the above-described problem, in one aspect of the present invention, at least one first optical characteristic unit that reflects light incident on the light incident surface in a direction different from the light incident direction is provided on the light incident surface. A first region arranged along;
Before the second optical characteristic part, the optical characteristic including at least one of reflection characteristic, refraction characteristic, absorption characteristic, transmission characteristic and light emission characteristic with respect to the light incident on the light incident surface is different from that of the first optical characteristic part. And a second region disposed along the writing light surface. A light control member is provided.

  At least one of the placement location and the placement area of the first region and the second region may be set based on at least one of a light incident direction and a light incident angle of light incident on the light incident surface. Good.

  The light incident on the light incident surface may be direct light or indirect light from the sun.

  The first region and the second region may be arranged along a vertical direction.

The first region is disposed above the second region in the vertical direction,
The light incident on the first region from the light incident surface is reflected by the first region and travels upward,
The light incident on the second region from the light incident surface may be reflected or refracted by the second region and travel upward or downward.

The first region is disposed above the second region in the vertical direction,
The light incident on the first region from the light incident surface is reflected by the first region and travels upward,
The light incident on the second region from the light incident surface may be absorbed by the second region.

  The first area and the second area may be arranged along a horizontal direction.

  At least one of the first region and the second region may be distributed and arranged at a plurality of locations on the light incident surface.

  A plurality of the first regions and the second regions may be alternately arranged along at least one of the vertical direction and the horizontal direction.

The light incident surface is provided with three or more regions including the first region and the second region,
Each of the three or more regions has optical characteristics including at least one of a reflection property, a refraction property, an absorption property, a transmission property, and a light emission property with respect to the light incident on the light incident surface. Is different,
Each of the three or more regions may be arranged in a predetermined order along the light incident surface.

  A light exit direction of light incident on the first region from the light incident surface may be substantially equal to a light exit direction of light incident on the second region from the light incident surface.

  The first region and the second region may be different from each other in at least one of reflectance, refractive index, absorption, and transmittance of at least one light in a visible region, an infrared region, and an ultraviolet region.

The first region and the second region are provided on a transparent substrate,
The first optical property portion is a first groove filled with a first filler disposed along the light incident surface on the transparent substrate,
The second optical characteristic portion is a second groove that is arranged along the light incident surface on the transparent substrate and filled with a second filler.
The first groove in the first region and the second groove in the second region may be different from each other in at least one of shape, size, interval, and number.

Each of the first region and the second region is provided on a prism sheet,
The first optical characteristic part and the second optical characteristic part may be prism parts having different shapes, sizes, and materials on the prism sheet.

  Appearance by at least one of the arrangement of the first area and the second area, the arrangement of the first optical characteristic section in the first area, and the arrangement of the second optical characteristic section in the second area. And at least one of alphanumeric character / symbol information, graphic information, and image information may be included.

  According to the present invention, incident light can be effectively used without complicating the structure, and as a result, energy consumption and carbon dioxide emission can be suppressed.

FIG. 2A is a partial cross-sectional view of the light control member 1 according to the first embodiment, and FIG. (A) shows the light shielding range by the eaves 9 when the sunlight incident angle is low, and FIG. 2 (b) shows the light shielding range by the eaves 9 when the sunlight incident angle is high. Sectional drawing of the light control member 1 which concerns on 2nd Embodiment. The figure which shows an example of the prism sheet 20 applicable to the light control member 1 which concerns on 1st and 2nd embodiment. The figure which shows the roll curtain 30 which affixed the light control member 1 which concerns on 4th Embodiment. The figure which shows an example of the usage method of the roll curtain 30 of FIG. The figure which shows the example of the light control member 1 which concerns on 5th Embodiment. The figure which shows the example which provides a light shelf. The figure explaining the light control member 1 which concerns on 6th Embodiment. The expanded sectional view of the light control member 1 of FIG.

  Hereinafter, embodiments of the present invention will be described in detail.

(First embodiment)
FIG. 1A is a partial cross-sectional view of the light control member 1 according to the first embodiment, and FIG. 1B is a plan view of the light control member 1. The light control member 1 of FIG. 1 can be attached to, for example, a window glass 3 to produce a window or a lighting tool, and is called a so-called window film. In this case, the top and bottom of FIG.

  The internal structure of the light control member 1 of FIG. 1 may be integrated into the window or the lighting tool 3 as a part of composite glass, for example. In the present embodiment, the light control member 1 in FIG. 1 is referred to as the light control member 1 including the case where the internal structure of the light control member 1 is integrated into a window or a daylighting tool.

  One surface (light incident surface) 1 a of the light control member 1 in FIG. 1 is attached to a window or a lighting tool 3 via a bonding layer 2, for example. Further, the other surface (light exit surface) 1 b of the light control member 1 is covered with a protective layer 4.

  The light control member 1 in FIG. 1 includes at least a first region 5 and a second region 6 as its internal structure.

  The first region 5 includes at least one first optical characteristic unit 7 that reflects light incident on the light incident surface 1a of the light control member 1 in a direction different from the light incident direction. The first optical property portion 7 is a portion in which a first filler is filled in a groove disposed along the light incident surface 1 a of a transparent base material that is a base material of the light control member 1.

  The second region 6 is different from the first optical characteristic unit 7 in the optical characteristics including at least one of reflection characteristics, refraction characteristics, absorption characteristics, and light emission characteristics with respect to the light incident on the light incident surface 1a. It has a characteristic part 8. The second optical characteristic portion 8 is obtained by filling a second filling material into a groove disposed along the light incident surface 1 a of the transparent base material that is a base material of the light control member 1.

  A plurality of first optical characteristic portions 7 filled in the grooves in the first region 5 and a plurality of second optical characteristic portions 8 filled in the grooves in the second region 6 are arranged separately in a predetermined direction. It is particularly preferable that the first region 5 and the second region 6 are arranged side by side. By arranging a plurality of regions having different optical characteristics on one light control member 1, it is possible to select suitable optical characteristics for each region according to the usage status of the light control member 1. Because it can. In addition, since the same filling material can be filled in a plurality of grooves within a certain range, the manufacturing efficiency is improved. Therefore, it is preferable that the first region 5 and the second region 6 each occupy a certain area range, and both the first region 5 and the second region 6 are at least 1% or more of the entire light control member. Preferably, it occupies an area range of 5% or more, more preferably 10% or more.

  By changing the shapes of the first optical characteristic unit 7 and the second optical characteristic unit 8 from each other, the optical characteristics of the first optical characteristic unit 7 and the second optical characteristic unit 8 can be made different from each other. Moreover, the optical characteristics of the first optical characteristic part 7 and the second optical characteristic part 8 can be made different from each other by changing the fillings of the first optical characteristic part 7 and the second optical characteristic part 8 to each other.

  Each of the first optical characteristic portion 7 and the second optical characteristic portion 8 of the light control member 1 in FIG. 1 is set in the horizontal direction of the light control member 1 (the front and back direction of the paper surface in FIG. 1). The longitudinal direction may be inclined from the horizontal direction. At this time, the longitudinal directions of the first optical characteristic unit 7 and the second optical characteristic unit 8 may be different from each other. Thereby, even if the first optical characteristic unit 7 and the second optical characteristic unit 8 are formed of the same material and light is incident at the same incident angle from the same incident direction, the reflection directions can be made different from each other. it can.

  The cross-sectional shapes of the first optical characteristic unit 7 and the second optical characteristic unit 8 are not particularly limited, and may be any of, for example, a triangle, a trapezoid, a rectangle, and a circle. By changing the cross-sectional shape and the size of the first optical characteristic unit 7 and the second optical characteristic unit 8, the optical characteristics of the first region 5 and the second region 6 can be made different from each other. The difference in cross-sectional shape is, for example, that at least one of the length and height of the bottom side of the cross-sectional shape of the first optical characteristic unit 7 and the second optical characteristic unit 8 is different, or the angle formed between the bottom side and the side in contact with the bottom side. It can be considered that the length is different or the length of the side facing the base is different.

  In addition, the arrangement interval and the number of the first optical characteristic portions 7 in the first region 5 and the arrangement interval and the number of the second optical characteristic portions 8 in the second region 6 may be changed from each other. The optical characteristics of the first region 5 and the second region 6 can be made greatly different. In addition, the arrangement | positioning space | interval of the 1st optical characteristic part 7 in the 1st area | region 5 does not necessarily need to be uniform. Similarly, the arrangement interval of the second optical characteristic portions 8 in the second region 6 is not necessarily uniform.

  As described above, various specific means for making the optical characteristics of the first optical characteristic section 7 and the second optical characteristic section 8 different from each other can be considered, but basically any means may be adopted. . That is, the first optical characteristic unit 7 and the second optical characteristic unit 8 include optical characteristics including at least one of a reflection characteristic, a refraction characteristic, an absorption characteristic, an absorption characteristic, and a light emission characteristic with respect to light incident on the light incident surface 1a. Should be different from each other. In other words, the first optical characteristic unit 7 and the second optical characteristic unit 8 may have different optical characteristics with respect to at least part of light in at least one wavelength region of the visible region, the infrared region, and the ultraviolet region.

  It is particularly preferable that the optical characteristics for light in the wavelength range included in the near infrared region that particularly affects the thermal action in the infrared region and the light in the wavelength range included in the near ultraviolet region that particularly affects the chemical action are different in the ultraviolet region. . In the present specification, heat rays are synonymous with infrared light, and actinic rays are synonymous with ultraviolet light.

  It is preferable that the first optical characteristic unit 7 and the second optical characteristic unit 8 have different optical characteristics including two or more of a reflection characteristic, a refraction characteristic, an absorption characteristic, a transmission characteristic, and a light emission characteristic with respect to incident light. This is because the plurality of optical characteristics are different so that they become more complementary, making it easier to effectively use incident light.

  In the example of FIG. 1B, the first region 5 is provided above the second region 6, but the areas of the first region 5 and the second region 6 may be the same or different. Good. Further, as will be described later, the first region 5 and the second region 6 do not need to extend from one end side to the other end side of the light control member 1 in the horizontal direction, and are arranged only in a part in the horizontal direction. May be.

  For the internal structure of the light control member 1 sandwiched between the bonding layer 2 and the protective layer 4, a base material in which a groove is formed and a filler filled in the groove are used.

  The base material is a transparent base material that transmits at least part of light in the visible region. The main constituent material of the base material is, for example, a resin whose main component is acrylic, polyester, polyolefin, polycarbonate, or the like. These resins may be modified.

  The filler is filled in the groove formed in the base material and contains a light control material. The light control material is a material used for imparting or adjusting the optical properties of the filler. The content of the light control material can be appropriately changed depending on the type of the light control material and the degree of desired optical characteristics, and may be a small amount when a light control material having a large influence on the optical characteristics is used. The filler may contain a binder having a function of holding the light control material, an additive imparting a function other than the light control, and the like. For example, after filling a groove formed in a base material with a composition containing a light control material, a curable material that functions as a binder or a crosslinking part after curing, and an optional additive, the composition is heated. Or irradiating with ionizing radiation such as light or electron beam. At this time, if the light control material itself is a curable material or the light control material is a thermoplastic resin, the shape can be maintained with only the light control material, and therefore the filler contains a binder. It does not have to be.

  The first optical characteristic unit 7 in the first region 5 can reflect light incident on the side surface of the first optical characteristic unit 7 from the light incident surface 1a obliquely upward and guide it to the indoor ceiling, for example. Have good reflection characteristics. In order to give such a reflection characteristic to the first optical characteristic unit 7, the shape of the side surface of the first optical characteristic unit 7 on which the light from the light incident surface 1a is incident is inclined and the first optical characteristic is obtained. It is conceivable to make the refractive index of the portion 7 smaller than the refractive index of the base material. The reflection direction can be adjusted by changing the inclination angle of the side surface of the first optical characteristic portion 7. More specifically, the greater the inclination angle of the side surface, the lower the direction of light reflection at the side surface. Therefore, when it is desired to guide reflected light to the indoor ceiling, it is desirable to make the inclination angle of the side surface of the first optical characteristic unit 7 gentle. As a main constituent material of the first optical characteristic unit 7, for example, it is conceivable to contain a scattering material such as a scattering resin. The reason why the scattering material is used is that it is desirable to scatter the incident light to the first optical characteristic section 7 because surface reflection tends to occur when the incident light angle is low.

  On the other hand, the second optical characteristic portion 8 in the second region 6 has a side surface on which light from the light incident surface 1 a is incident as an inclined surface, and the inclination angle of the second optical characteristic portion 8 is the inclination of the side surface of the first optical characteristic portion 7. The light incident on the side surface of the second optical characteristic unit 8 from the light incident surface 1a is reflected at a steeper angle than the first optical characteristic unit 7 so as to be guided to the indoor ceiling. May be. Thereby, the second area 6 is arranged below the first area 5, but is almost the same as the indoor ceiling illumination area illuminated by the light reflected by the first optical characteristic section 7 in the first area 5. The same area can be illuminated with the light reflected by the second optical characteristic portion 8 in the second region 6, and the lighting efficiency can be improved. In this case, for example, a mirror material is conceivable as a main constituent material of the second optical characteristic portion 8. The reason why the mirror material is desirable is that surface reflection is less likely to occur when the incident light angle is high, and therefore it is desirable to facilitate surface reflection using a mirror material.

  Alternatively, the second optical characteristic unit 8 in the second region 6 increases the inclination angle of the side surface on which the light from the light incident surface 1a is incident, and refracts the light incident on the side surface obliquely downward. May be. This makes it possible to illuminate an indoor window area that is originally shaded. In this case, the main constituent material of the second optical characteristic section 8 may be a high refractive index laminated material using a polymer or the like that can suppress a refractive index difference from the base material of the light control member 1.

  Further, at least one of the first optical characteristic unit 7 in the first region 5 and the second optical characteristic unit 8 in the second region 6 is in addition to the function of reflecting or refracting incident light, or instead of this function. Further, it may have a function of absorbing light in a specific wavelength region (for example, near infrared region or near ultraviolet region). In order to have a function of absorbing light in the near infrared region, a heat ray absorbing material may be used as at least one light control material of the first optical characteristic unit 7 and the second optical characteristic unit 8.

  Furthermore, at least one of the first optical characteristic unit 7 and the second optical characteristic unit 8 may include a coloring material that absorbs at least part of light in the visible region as a light control material. A difference in refractive index of light occurs at the interface of the first optical characteristic unit 7 or the interface of the second optical characteristic unit 8, and thus the visible light reflected at the interface causes multiple reflections repeatedly in the light control member 1. There is also a possibility. As a result, the reflected light and the incident light interfere with each other, and there is a possibility that the image visually recognized as the appearance of the light control member 1 becomes a multiple image. If colored particles are included in at least one of the first optical characteristic part 7 and the second optical characteristic part 8, the colored particles are visible when the light enters the first optical characteristic part 7 or the second optical characteristic part 8. A part of the light can be absorbed, and the intensity of visible light reflected at the interface of the first optical characteristic unit 7 or the second optical characteristic unit 8 can be attenuated. As a result, it is possible to suppress the occurrence of multiple reflections of visible light in the light control member 1 and the occurrence of interference phenomenon, and to perform multiplexing without significantly reducing the transmittance in the visible light region of the entire light control member 1. The expression of the image can be suppressed.

  In addition, at least one main constituent material of the first optical characteristic unit 7 in the first region 5 and the second optical characteristic unit 8 in the second region 6 includes a photoinitiator, an ultraviolet absorber, a light stabilizer, and the like. It may be included.

  Further, at least one of the first optical characteristic unit 7 in the first region 5 and the second optical characteristic unit 8 in the second region 6 is added with a luminous material that stores incident light and emits light as a light control member. May be. Thereby, the 1st area | region 5 and the 2nd area | region 6 can be light-emitted by a predetermined color at night etc. where the room is dark. By changing the kind of the phosphorescent material between the first filling and the second filling, the first region 5 and the second region 6 can emit light in different colors. Moreover, the 1st area | region 5 and the 2nd area | region 6 can be light-emitted by different intensity | strength by changing content of a phosphorescent material with a 1st filler and a 2nd filler.

  Thus, the first optical characteristic unit 7 and the second optical characteristic unit 8 are different in shape from each other, and in addition, the filler in the first optical characteristic unit 7 and the second optical characteristic unit 8 Each of the fillers may be different in at least one of the type of the main constituent material, the component ratio of the main constituent material, the type of additive mixed with the main constituent material, and the component ratio of the additive .

  Buildings often have eaves above the windows, and this eaves blocks sunlight from high incident angles. FIG. 2A shows a light shielding range by the eaves 9 when the sunlight incident angle is low, and FIG. 2B shows a light shielding range by the eaves 9 when the sunlight incident angle is high.

  As can be seen from these figures, sunlight with a high incident angle is not incident on the upper region in the window. Therefore, as shown in FIG. 2C, the light shielding range by the eaves 9 is the first region 5 described above, and this region has optical characteristics that reflect sunlight from a low incident angle obliquely upward. The first optical characteristic unit 7 may be disposed. In this case, the inclination angle of the side surface of the first optical characteristic unit 7 on which sunlight is incident needs to be an inclination angle at which sunlight is totally reflected.

  On the other hand, in the second region 6 disposed below the first region 5, sunlight having a low light incident angle and a high light incident angle is incident, so that the reflection characteristics having a wide allowable range of the light incident angle. It is desirable to arrange the second optical characteristic portion 8 having

  In order to direct the reflected light from the second optical characteristic unit 8 in the ceiling direction, it is conceivable that the inclination angle of the side surface of the second optical characteristic unit 8 is relaxed. The light is easily refracted without being reflected by the side surface of the second optical characteristic portion 8, and the ratio of the reflected light toward the ceiling is reduced. Therefore, as shown in FIG. 2 (d), a first side surface portion 7a having a large inclination angle and a second side surface portion 7b having a small inclination angle may be provided on the side surface of the second optical characteristic portion 8. In the case of FIG. 2D, the incident (sun) light is reflected by the first side surface portion 7a and proceeds in the direction of the second side surface portion 7b, and subsequently reflected by the second side surface portion 7b and proceeds in the ceiling direction. Since the first side surface portion 7a on which the incident light is incident has a large inclination angle, the ratio of the light refracted by the first side surface portion 7a is reduced, and most of the incident light is the first side surface portion 7a and the second side surface portion. The light can be reflected by the portion 7b and directed toward the ceiling, and the utilization efficiency of incident light, that is, the daylighting efficiency is improved.

  As a main constituent material of the second optical characteristic portion 8, it is conceivable to use a mirror material such as a mirror ink. The reason is that when the incident angle is high, surface reflection is less likely to occur, and therefore it is desirable to make surface reflection easier by using mirror reflection. On the other hand, it is conceivable that the first optical characteristic portion 7 in the first region 5 uses a scattering material such as a scattering resin, a scattering ink, or a clear ink. This is because, when the incident angle is low, surface reflection is likely to occur, and therefore it is desirable to scatter incident light to the first optical characteristic unit 7.

  Moreover, since scattering resin and clear ink are cheaper than mirror ink etc., the 1st optical characteristic part 7 which consists of an inexpensive material is provided in the 1st area | region 5 into which only incident light with a low incident angle is incident. By using, the member cost as the light control member 1 whole can be suppressed.

  Thereby, when the eaves 9 are present above the window, the member cost of the light control member 1 can be suppressed while maintaining the lighting efficiency of the entire window.

  In addition, since it becomes possible to reflect even if it is a case where a light-incidence angle is large when a refractive index difference becomes large, about the 2nd optical characteristic part 8 in the 2nd area | region 6, instead of a mirror material, You may make it a hollow state.

  When there is a building near the window, sunlight is blocked by the building, and sunlight is incident on a part of the window only when the sun is at a high position. In this case, a member made of a material that can be used for daylighting only in an angular range where sunlight enters may be provided in the region.

  In the above description, the light control member 1 for windows placed in the vertical direction has been described. However, the light control member 1 of the present embodiment may be used for windows provided on a ceiling surface or an inclined surface. Even when the light control member 1 is arranged on the ceiling surface or the inclined surface, the light incident direction and the light incident angle of the sunlight incident on the light control member 1 vary depending on the time zone or season. In order to obtain efficiency, the members may be divided into a plurality of regions and members having different optical characteristics may be arranged for each region.

  Furthermore, in the above description, the example in which the light control member 1 is divided into two regions (the first region 5 and the second region 6) in the vertical direction has been described, but the number of regions divided in the vertical direction is not particularly limited. . Since the incident direction and the incident angle of sunlight change from time to time, the light control member 1 is divided into a plurality of regions more finely, and more optimal lighting efficiency is obtained according to the incident direction and incident angle of sunlight. As obtained, at least one of the shape, size, spacing, and number of grooves in each region may be optimized for each region. In addition, the light control material filled in the grooves in each region may be optimized for each region.

  Thus, in the first embodiment, the first region 5 and the second region 6 each having the first optical characteristic unit 7 and the second optical characteristic unit 8 having different optical characteristics are arranged side by side in the vertical direction. The lighting efficiency of the light control member 1 as a whole can be improved. In particular, in the present embodiment, since the optical characteristics of the first optical characteristic unit 7 and the second optical characteristic unit 8 are changed by changing the shapes and sizes of the first optical characteristic unit 7 and the second optical characteristic unit 8, it is more preferable to change the optical characteristics than to change only the packing of each other. The characteristics can be greatly different. Therefore, for example, the reflection direction can be changed greatly.

  In addition, each of the first optical characteristic unit 7 and the second optical characteristic unit 8 can have various optical characteristics including at least one of light reflection, light absorption, light refraction, light transmission, and light emission independently. The light control member 1 that meets the environmental conditions can be produced. Therefore, according to this embodiment, use of an illuminating device or air conditioning equipment can be suppressed, and energy consumption and carbon dioxide emission can be suppressed.

(Second Embodiment)
In the second embodiment described below, a first region 11 and a second region 12 each having a first optical property portion 14 and a second optical property portion 15 having different optical properties are arranged side by side in the horizontal direction. is there.

  As described above, the incident direction of sunlight changes from time to time depending on the daytime. Therefore, even if the light control member 1 is divided into a plurality of regions in the vertical direction as in the first embodiment and the optical characteristics are changed for each region, the desired lighting efficiency may not be obtained depending on the time zone. There is.

  Therefore, in the light control member 1 according to the second embodiment described below, a plurality of regions in which light can be efficiently collected in a plurality of different time zones are provided in one light control member 1.

  FIG. 3 is a sectional view of the light control member 1 according to the second embodiment. The light control member 1 in FIG. 3 is attached to, for example, a south-facing window for lighting. As illustrated in FIG. 3A, the light control member 1 includes a first region 11, a second region 12, and a third region 13 that are arranged in the vertical direction. Each of the first region 11, the second region 12, and the third region 13 is provided with a first optical characteristic unit, a second optical characteristic unit, and a third filling unit in which a groove is filled.

  As shown in FIG. 3 (d), the first region 11 has an optical characteristic that causes external light from diagonally left, that is, the west side to travel straight into the room and scatters external light from other directions. In order to provide such optical characteristics, the side surface of the first optical characteristic unit is inclined so that external light from the west side is reflected by the side surface of the first optical characteristic unit in the first region 11 and goes straight in the room. You can do it. In addition, it is desirable to include a scattering material in the main constituent material of the first optical characteristic unit so that external light from other directions is scattered on the side surface of the first optical characteristic unit.

  As shown in FIG. 3B, the second region 12 has an optical characteristic that causes the external light from the right side, that is, the east side to travel straight into the room and scatters the external light from other directions. In order to have such optical characteristics, the side surface of the second optical characteristic unit is inclined so that the external light from the east side is reflected by the side surface of the second optical characteristic unit in the second optical characteristic unit and goes straight in the room. You can do it. In addition, it is desirable to include a scattering material in the main constituent material of the second optical characteristic unit so that external light from other directions is scattered on the side surface of the second optical characteristic unit 15.

  As shown in FIG. 3 (c), the third region 13 has an optical characteristic in which external light from the front, that is, from the south side goes straight into the room, and external light from other directions is scattered. In order to provide such optical characteristics, the side surface of the third filling portion in the third region 13 may be inclined obliquely downward from the front direction. In addition, it is desirable to include a scattering material in the main constituent material of the second optical characteristic unit so that external light from other directions is scattered on the side surface of the second optical characteristic unit 15.

  Note that the straight traveling includes not only the case where light travels in the normal direction of the sheet surface of the light control member 1, but also the case where light travels obliquely upward or obliquely downward from the normal direction of the sheet surface.

  The light control member 1 of FIG. 3 goes straight into the room using any one of the first region 11 to the third region 13 even if the incident angle of sunlight changes during the day. Therefore, the daylighting efficiency can be made uniform regardless of the time zone of the first optical characteristic part and the second optical characteristic part during the daytime.

  In FIG. 3, the example in which the light control member 1 is divided into three regions in the vertical direction has been described, but the number of regions to be divided is not particularly limited. Moreover, the area of each area | region does not necessarily need to be the same.

  Moreover, each area | region in the light control member 1 does not necessarily intend to improve the lighting efficiency. That is, each region in the light control member 1 may have an optical characteristic including at least one of light reflection, light absorption, light refraction, and light emission independently.

  As described above, in the second embodiment, a plurality of regions are provided along the horizontal direction of the light control member 1, and each region has independent optical characteristics. Even if it changes during the day, the daylighting efficiency can be made uniform regardless of the time.

(Third embodiment)
In the first and second embodiments described above, an example in which the first optical characteristic portion 23 and the second optical characteristic portion 24 having different optical characteristics are formed separately in the transparent base material of the light control member 1 will be described. However, a prism sheet in which the first optical characteristic portion 23 and the second optical characteristic portion 24 are integrally formed on a transparent substrate may be used.

  FIG. 4 is a view showing an example of the prism sheet 20 applicable to the light control member 1 according to the first and second embodiments. The prism sheet 20 of FIG. 4 includes a first region 21 in which a prism-shaped first optical property portion 23 is integrally formed on a transparent substrate, and a prism-shaped second optical property portion different from the first optical property portion 23. 24 includes a second region 22 integrally formed on the transparent substrate. When the prism sheet 20 of FIG. 4 is applied to the first embodiment, the first region 21 and the second region 22 may be arranged side by side in the vertical direction. In addition, when the prism sheet 20 of FIG. 4 is applied to the second embodiment, the first region 21 and the second region 22 may be arranged side by side in the horizontal direction.

  The first optical characteristic portion 23 and the second optical characteristic portion 24 in the prism sheet 20 of FIG. 4 are different from each other in optical characteristics including at least one of light reflection, light refraction, light absorption, and light emission. In order to make such optical characteristics different, at least one of the shape, size, interval, and number of the first optical characteristic portion 23 and the second optical characteristic portion 24 may be made different from each other. In addition to this, for example, a material having different optical characteristics may be added to one of the first optical characteristic portion 23 and the second optical characteristic portion 24 that are integrally formed with the transparent substrate. The first optical characteristic unit 23 and the second optical characteristic unit 24 have the same functions as the first region 21 and the second region 22 in the first and second embodiments described above by making the optical characteristics different. Can be made.

(Fourth embodiment)
In the first to third embodiments described above, the example of the light control member 1 that can be attached to a window or a lighting tool has been described. However, the light control member 1 according to the fourth embodiment described below is described below. The present invention is applied to a roll curtain that can be placed on a window as required.

  FIG. 5 is a view showing a roll curtain 30 to which the light control member 1 according to the fourth embodiment is attached. The roll curtain 30 in FIG. 5 is adapted to the first region 31 adapted to the incident light in winter and the incident angle for spring and autumn, taking into account that the incident angle of sunlight varies depending on the season. The second region 32, the third region 33 adapted to the incident light angle for summer, the fourth region 34 having a function of scattering incident light regardless of the season, and the heat rays contained in the incident light regardless of the season And a fifth region 35 having a function of absorbing.

  The first region 31 to the fifth region 35 are different in the shape of the filling portion provided therein, and thereby, at least one of reflection characteristics, refraction characteristics, absorption characteristics, and light emission characteristics with respect to incident light is obtained. The optical characteristics to be included are different. More specifically, the filling portion in the first region 31 has a side surface with an inclination angle that reflects incident light from a winter incident angle, for example, toward the ceiling. The filling portion in the second region 32 has a side surface with an inclination angle that reflects incident light from the incident angles of spring and autumn in the direction of the ceiling, for example. Since the light incident angle in spring and autumn is larger than the light incident angle in winter, the inclination angle of the side surface of the filling portion in the second region 32 is larger than the inclination angle of the side surface of the filling portion in the first region 31. Set to an angle. The filling portion in the third region 33 has a side surface having an inclination angle that reflects incident light from a light incident angle in summer, for example, toward the ceiling. Since the light incident angle in summer is high, for example, as shown in FIG. 2 (d), the first inclined portion 7a and the second inclined portion 7b having different inclination angles are provided on the side surface of the filling portion. The light reflected by 7a may be further reflected by the second inclined portion 7b and advanced toward the ceiling. The main constituent material of the filling portion in the fourth region 34 contains a scattering material so that the incident light can be scattered regardless of the incident direction of the incident light. The filling portion in the fifth region 35 absorbs heat in the near-infrared region and near-ultraviolet region included in the incident light regardless of the incident direction of the incident light, so that the main constituent material absorbs heat rays. Contains material.

  Note that FIG. 5 shows an example having a total of five regions, the first region 31 to the fifth region 35, but the number of regions and the function of each region may be arbitrarily changed. That is, the roll curtain 30 only needs to include at least two regions having different optical characteristics including at least one of reflection characteristics, refraction characteristics, absorption characteristics, and light emission characteristics with respect to incident light.

  FIG. 6 is a diagram showing an example of how to use the roll curtain 30 of FIG. The winding amount of the roll curtain 30 is adjusted, and an area corresponding to the season is arranged so as to overlap the window 3. The size in the winding direction of each region provided on the roll curtain 30 is adjusted to the vertical size of the window 3, and one region is overlapped on the entire surface of the window 3 as shown in FIG. Can be arranged.

  If the upper part of the window 3 scatters incident light for daylighting and the lower part of the window 3 absorbs heat rays and has a heat insulating function, as shown in FIG. 5 may be disposed, and the fifth region 35 of FIG. 6 may be disposed below the window 3. In this case, it is necessary to match the vertical length of the fourth region 34 and the fifth region 35 with the vertical length of the window 3. Further, the fifth region 35 disposed on the lower side of the window is easily reachable by human eyes. Therefore, the fifth region 35 may be made of the same material as that of the clear film in order to increase the visible light transmittance. As described at the end of the second embodiment, the groove in the fifth region 35 may be filled with any material having the same optical characteristics as the base material of the roll curtain 30.

  In the example of FIG. 6, the example in which the roll curtain 30 is moved in the vertical direction has been described. However, when the roll curtain 30 is moved in the horizontal direction, a plurality of regions may be provided along the horizontal direction.

  As described above, in the fourth embodiment, since a plurality of regions having different optical characteristics are provided in the roll curtain 30, an appropriate region is selected according to the incident angle and direction of incident light, and the window 3 And the user can arbitrarily select the optical characteristics of the roll curtain 30.

(Fifth embodiment)
In the first to fourth embodiments described above, the example in which the light control member 1 is provided with a plurality of regions having different optical characteristics has been described. However, in each region including a member having different optical properties, the first optical property unit With the arrangement of 7 etc., the appearance looks different. Therefore, in the fifth embodiment, the appearance of the light control member 1 is given a design by actively utilizing the influence of the optical characteristics of the light control member 1 on the appearance.

  FIG. 7 is a diagram illustrating an example of the light control member 1 according to the fifth embodiment. 7A is an example in which two regions 41 and 42 are provided in the vertical direction, FIG. 7B is an example in which two regions 41 and 42 are provided in the horizontal direction, and FIG. FIG. 7D shows an example in which a plurality of different regions 44 are arranged vertically and horizontally, and FIG. 7E shows an appearance. Each shows an example in which a plurality of regions 44 representing figures, symbols, and the like are provided.

  In the region 45, a moon, an arrow, and a face mark are drawn. Designs that can be expressed by a member having predetermined optical characteristics are, for example, alphanumeric character / symbol information, graphic information, and image information. When any design is represented on the exterior as in the region 45, the light control member 1 is divided into regions vertically and horizontally, and the depth of the groove in each region is changed. You can do it. At this time, if you want some of the grooves to have the same appearance as the surrounding transparent base material, you can fill some material with the same optical characteristics as the transparent base material. It can be made indistinguishable.

  If only members having different optical characteristics are arranged in each region with the design property in mind, the original optical characteristics may not be sufficiently obtained. Therefore, it is necessary to devise the arrangement of members and the like within a range that does not impair the original optical characteristics so that each region has design properties.

  Further, in FIGS. 7A to 7C, the first optical characteristic portions 7 and the like are evenly arranged in each region, but the shape of the groove such as the groove depth is different for each region. Therefore, the appearance of each region is different. Thus, by arranging a plurality of regions having different appearances in the one-dimensional direction or the two-dimensional direction, various patterns having different shades and shades can be produced, and the design can be given by this pattern. If it is desired to make the appearances of the two regions completely different, the shape of the groove in each region may be greatly changed. On the other hand, when it is desired to make the two regions look similar but not the same, the groove shapes in each region may be similar to each other.

  In addition to changing the shape and size of the grooves in each region, it is possible to make a difference in appearance by changing the type of filler to be filled in the grooves.

  Furthermore, by including a phosphorescent material or a fluorescent material in the first optical characteristic portion 7 or the like in each region, it is possible to emit light with a desired color, and design properties may be given depending on the emission color and emission intensity.

  The fifth embodiment may be implemented in any combination with the first to fourth embodiments described above. Thereby, while being able to give a desired optical characteristic to each area | region of the light control member 1, the light control member 1 excellent also as a design can be produced.

  In each of the above-described embodiments, an example in which direct sunlight is incident on the window 3 or the roll curtain 30 has been described. However, as illustrated in FIG. The reflected light may enter the window 3 or the roll curtain 30. That is, the window 3 and the roll curtain 30 may use sunlight indirect light for daylighting.

  Since the light shelf 50 is generally attached to the outside of the outer wall of the building, the reflected light from the light shelf 50 enters the window 3 and the roll curtain 30 obliquely upward. Therefore, if the light control member 1 for the window 3 or the roll curtain 30 has the first optical characteristic section 7 and the second optical characteristic section 8 shown in FIG. The light is incident on the lower side surface of the first optical characteristic unit 7 and the second optical characteristic unit 8. Depending on the inclination angle of the side surface, the light from the light shelf 50 incident on the side surface is reflected downward. For this reason, when the light shelf 50 is provided, the first optical characteristic unit 7 is configured so that the light from the light shelf 50 entering the lower side surface of the second optical characteristic unit 8 is reflected obliquely upward. It is necessary to adjust the inclination angle of this side surface. Alternatively, the light from the light shelf 50 may be scattered on the side surface. Further, since the reflected light from the light shelf 50 does not reach the lower side of the light shelf 50, it is necessary to change the structures of the first optical characteristic unit 7 and the second optical characteristic unit 8 on the upper side and the lower side of the light shelf 50. is there.

  FIG. 8 shows an example in which the first region 5 is provided above the installation location of the light shelf 50 and the second region 6 is provided below. The reflected light from the light shelf 50 is incident on the first region 5 but is not incident on the second region 6. For this reason, the lower side surface of the first optical characteristic section 7 in the first region 5 is tilted, and the reflected light from the light shelf 50 is further reflected by this side surface and proceeds obliquely upward. Further, the lower side surface of the second optical characteristic portion 8 in the second region 6 is not inclined but extends in the normal direction of the sheet surface 1a. In addition, the main constituent material of the first optical characteristic unit 7 contains a scattering material, and the second optical characteristic unit 8 in the second region 6 gradually decreases in the scattering characteristic from the upper side to the lower side, so that visible light is reduced. The main constituent material of the second optical characteristic section 8 or its additive is changed so that the transmission characteristics gradually increase.

  Thus, in the example of FIG. 8, the first area 5 can take in both the direct light from the sun and the indirect light from the light shelf 50 to illuminate the room brightly. In the second area 6, the lower side is visible light. Since the transmittance is improved, it is possible to prevent the lower side from entering sunlight from becoming dark.

(Sixth embodiment)
In the first to fifth embodiments described above, an example in which external light such as sunlight is incident on the light control member 1 has been described. However, in the present invention, illumination light in a building is incident on the light control member 1. Thus, the present invention can also be applied when performing daylighting control.

  FIG. 9 is a diagram illustrating the light control member 1 according to the sixth embodiment. The light control member 1 in FIG. 9 includes a light control layer 51 and a light reflection layer 52. For example, the light control member 1 is attached to a wall 50 extending in a vertical direction in a building. A light reflecting layer 52 is disposed on the wall 50 side, and illumination light 57a from the lighting device 57 in the building is incident on one surface (hereinafter referred to as a light incident surface) 1a of the light control layer 51.

  A plurality of first inclined surfaces 53 and a plurality of second inclined surfaces 54 are alternately arranged on the side of the light control layer 51 facing the light incident surface 1a, that is, on the light reflecting layer 52 side. The inclination angles of the first inclined surface 53 and the second inclined surface 54 with respect to the normal direction d1 of the light incident surface 1a are, for example, an upper region (hereinafter referred to as a first region) 55 of the light control member 1 and a lower region. (Hereinafter referred to as the second region) 56. Thereby, the reflection characteristic with respect to the illumination light 57 a in the building can be changed between the first region 55 and the second region 56.

  FIG. 10 is an enlarged cross-sectional view of the light control member 1 of FIG. The illumination light 57 a incident on the light incident surface 1 a is refracted by the light incident surface 1 a and travels in the direction of the first inclined surface 53 or the second inclined surface 54. The angle of the second inclined surface 54 with respect to the normal direction d1 of the light incident surface 1a is smaller than that of the first inclined surface 53. For this reason, the illumination light 57a that has reached the second inclined surface 54 passes through the second inclined surface 54, is diffused and reflected by the light reflecting layer 52, and travels through the light incident surface 1a in the building. Further, the illumination light 57 a that has entered the light incident surface 1 a and reached the first inclined surface 53 is reflected by the first inclined surface 53, reaches the second inclined surface 54, and is further reflected by the second inclined surface 54. As a result, the light travels through the light incident surface 1a in the building. Further, in the example of FIG. 10, a flat surface 58 is provided between the first inclined surface 53 and the second inclined surface 54, and this surface 58 is in contact with the light reflecting layer 52. When light from the light incident surface 1a is incident on this surface, it is reflected by this surface and travels through the light incident surface 1a in the building.

  In the case where the first region 55 and the second region 56 described above are provided vertically along the vertical direction of the light control member 1, assuming that the lighting device 57 is on the ceiling in the building, the illumination light 57a from the lighting device 57 is incident. Since the angle is originally different between the first region 55 and the second region 56, even if the inclination angles of the first inclined surface 53 and the second inclined surface 54 are the same between the first region 55 and the second region 56, Although the reflection direction of the illumination light 57a differs between the first region 55 and the second region 56, the inclination angle of the first inclined surface 53 and the second inclined surface 54 is further changed to the first region 55 and the second region 56. Thus, the reflection characteristics of the first region 55 and the second region 56 can be greatly changed.

  Further, the light control member 1 of FIG. 9 has a function of absorbing the illumination light 57a and absorbing heat by mixing colored particles depending on the region, in addition to being used only for the purpose of reflecting the illumination light 57a. You may have it.

  Furthermore, the area division of the light control member 1 in FIG. 9 may be performed not only in the vertical direction but also in the horizontal direction.

  Further, if the light control member 1 of FIG. 9 is divided into regions and each region has different optical characteristics, the appearance of each region is different. Therefore, as in the fifth embodiment, each region It is also possible to produce the light control member 1 excellent not only in optical function but also in design by actively utilizing the difference in appearance.

  The aspect of the present invention is not limited to the individual embodiments described above, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 Light control member, 1a Light entrance surface, 2 Bonding layer, 3 Window or lighting tool, 4 Protection layer, 5 1st area | region, 6 2nd area | region, 7 1st optical characteristic part, 8 2nd optical characteristic part, 9 eaves , 11 1st area, 12 2nd area, 13 3rd area, 14 1st optical characteristic part, 15 2nd optical characteristic part, 16 3rd optical characteristic part, 20 Prism sheet, 21 1st area, 22 2nd area , 23 1st optical characteristic part, 24 2nd optical characteristic part, 30 Roll curtain, 31 1st area | region, 32 2nd area | region, 33 3rd area | region, 34 4th area | region, 35 5th area | region, 41-45 area | region, 50 Wall, 51 Light control layer, 52 Light reflection layer, 53 First inclined surface, 54 Second inclined surface, 55 First region, 56 Second region, 57 Illuminating device, 57a Illuminating light, 58 Flat surface

Claims (16)

A first region in which at least one first optical characteristic part that reflects light incident on the light incident surface in a direction different from the light incident direction is disposed along the light incident surface;
Before the second optical characteristic part, the optical characteristic including at least one of reflection characteristic, refraction characteristic, absorption characteristic, transmission characteristic and light emission characteristic with respect to the light incident on the light incident surface is different from that of the first optical characteristic part. And a second region arranged along the writing light surface.   The said 1st optical characteristic part and the said 2nd optical characteristic part have a mutually different shape so that the optical characteristic with respect to the light which injected into the said incident surface may each differ. Light control member.   At least one of an arrangement place and an arrangement area of the first area and the second area is set based on at least one of an incident direction and an incident angle of light incident on the light incident surface. The light control member according to claim 1 or 2.   The light control member according to claim 1, wherein the light incident on the light incident surface is direct light or indirect light from the sun.   The light control member according to claim 1, wherein the first region and the second region are arranged along a vertical direction. The first region is disposed above the second region in the vertical direction,
The light incident on the first region from the light incident surface is reflected by the first region and travels upward,
The light control member according to claim 5, wherein light incident on the second region from the light incident surface is reflected or refracted by the second region and travels upward or downward. The first region is disposed above the second region in the vertical direction,
The light incident on the first region from the light incident surface is reflected by the first region and travels upward,
The light control member according to claim 5, wherein light incident on the second region from the light incident surface is absorbed by the second region.   The light control member according to claim 1, wherein the first region and the second region are arranged along a horizontal direction.   9. The light control member according to claim 1, wherein at least one of the first region and the second region is dispersedly disposed at a plurality of locations on the light incident surface.   The light control member according to claim 9, wherein a plurality of the first regions and the second regions are alternately arranged along at least one of a vertical direction and a horizontal direction. The light incident surface is provided with three or more regions including the first region and the second region,
Each of the three or more regions has optical characteristics including at least one of a reflection property, a refraction property, an absorption property, a transmission property, and a light emission property with respect to the light incident on the light incident surface. Is different,
The light control member according to claim 1, wherein each of the three or more regions is arranged in a predetermined order along the light incident surface.   The light exit direction of the light incident on the first region from the light incident surface is substantially equal to the light exit direction of the light incident on the second region from the light incident surface. The light control member in any one of thru | or 11.   2. The first region and the second region are different from each other in at least one of reflectance, refractive index, absorption rate, and transmittance of at least one light in a visible region, an infrared region, and an ultraviolet region. The light control member according to any one of 1 to 12. The first region and the second region are provided on a transparent substrate,
The first optical property portion is a first groove filled with a first filler disposed along the light incident surface on the transparent substrate,
The second optical characteristic portion is a second groove that is arranged along the light incident surface on the transparent substrate and filled with a second filler.
The said 1st groove | channel in the said 1st area | region and the said 2nd groove | channel in the said 2nd area | region differ from each other in at least one of a shape, a size, a space | interval, and a number. A light control member according to claim 1. Each of the first region and the second region is provided on a prism sheet,
The said 1st optical characteristic part and the said 2nd optical characteristic part are prism parts from which at least one of the shape on the said prism sheet, a size, and material differs, The Claim 1 thru | or 13 characterized by the above-mentioned. Light control member.   Appearance by at least one of the arrangement of the first area and the second area, the arrangement of the first optical characteristic section in the first area, and the arrangement of the second optical characteristic section in the second area. 16. The light control member according to claim 1, comprising at least one of alphanumeric character / symbol information, graphic information, and image information appearing in FIG.