JP2018178409A - Light blind device and window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a visible state and an invisible state of the deep side through a flat plate like a glass plate and others with a relatively simple structure.SOLUTION: A light blind device includes a planar transparent glass 11 which has a translucent property, LEDs 12 which are light sources that emit light from continuous positions on a line or from discrete positions on the line to the end surface of the planar plate, and a surface on which plural emboss-processed grooves 22 are formed, and comprises a transparent resin film 21 obtained by bonding the surface on which the grooves 22 are formed against one surface of the transparent glass 11, and control means which turns on and off the LED 12 that is the light source.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical blind device capable of realizing a visible state and an invisible state on the back side through a flat plate such as a glass plate, and a window configured using the optical blind device.

  Conventionally, for example, a light shielding film attached to a window of an automobile is known (Patent Document 1). According to this film, it is colored when it is exposed to sunlight and functions as a light shielding film, making it difficult to look inside the car from outside. In addition, it becomes transparent at night and secures sufficient visibility. In addition, Patent Literatures 2 and 3 disclose a display device that causes an image drawn on a positive film to emit light using an LED.

  Furthermore, Patent Document 4 discloses a windowing sheet having excellent stain resistance and improved design. Further, Patent Document 5 discloses a window glass panel provided with an optical element that reflects or scatters incoming light.

JP-A-9-300516 JP, 2015-220074, A JP, 2009-123557, A Unexamined-Japanese-Patent No. 11-198303 JP-A-2010-518286

  However, the invention described in Patent Document 1 has a light shielding property when it is bright and becomes transparent when it is dark, and the user can not control the light shielding. Further, Patent Documents 2 and 3 are used for displays, and when used as windows for blinds, a transparent state can not be realized unless the device is removed.

  The sheet described in Patent Document 4 is also a sheet for window attachment for transmitting patterns and information, and when it is attached to a window, it is impossible to see the other side through this sheet. Furthermore, the window glass panel described in Patent Document 5 suppresses the glare of incident sunlight, and can not control whether the other side of the window glass panel becomes invisible or invisible.

  The present invention has been made in view of the current state of light blinds as described above, and the object of the present invention is to provide a light with which a visible state and an invisible state on the back side through a flat plate such as a glass plate can be realized It is providing a blind apparatus. Another object is to provide a window constructed using the light blind device.

  The light blind device according to the present invention comprises: a flat plate having translucency; a light source for emitting light to an end face of the flat plate from a continuous position on a line or a discrete position on a line; and a plurality of embossed grooves The transparent resin film has a formed surface and is adhered with the grooved surface facing one surface of the flat plate, and a control means for turning on / off the light source. Do.

  In the light blind device according to the present invention, the light source is characterized by including an LED or a cold cathode fluorescent tube.

  In the optical blind device according to the present invention, the grooves are characterized in that the spacing is formed uniformly, gradually wide from one end side, or gradually narrowed from one end side.

  In the optical blind device according to the present invention, the grooves are characterized in that the intervals are formed at a predetermined width, a predetermined width, a gradually wide width, or a gradually narrow width, for each fixed length.

  The optical blind device according to the present invention is characterized in that the cross-sectional shape of the groove is formed in a V shape, a semicircular or elliptical shape, or a dish shape.

  The light blind device according to the present invention is characterized in that the groove is formed over the entire area of the transparent resin film or in a predetermined area of the transparent resin film.

  In the light blind device according to the present invention, the light source is provided on at least one end face of the flat plate.

  In the light blind device according to the present invention, the transparent resin film is a polyester film or a polypropylene film.

  In the light blind device according to the present invention, the flat plate is any one of a glass plate, an acrylic plate and a polycarbonate plate.

  A window according to the present invention is a window configured using the light blind device according to any one of claims 1 to 8, and the window frame according to any one of claims 1 to 8. It is characterized in that at least a flat plate, a light source and a transparent resin film in the configuration of the light blind device are provided.

  According to the present invention, the light emitted from the light source enters the inside from the end face of the light transmitting flat plate, is totally reflected by the groove of the transparent resin film, and the surface to which the flat transparent resin film is not attached Head outside This light reaches people who see as glare, and the other side of the light blind device can not be seen. When the light source is turned on, there is a blind effect as described above. When the light source is turned off, it can be seen through the other side of the light blind device without glare. That is, the visible state and the invisible state of the back side through a flat plate such as a glass plate can be realized by a relatively simple configuration.

The front view of the window concerning the embodiment of the present invention. AA sectional drawing of FIG. The expanded sectional view of the groove part of the light blind apparatus which concerns on embodiment of this invention. The front view which shows the 1st example of the whole view in the groove | channel of the optical blind apparatus which concerns on embodiment of this invention. The front view which shows the 2nd example of the whole view in the groove | channel of the optical blind apparatus which concerns on embodiment of this invention. The expanded sectional view which shows the example of the light reflection in the groove | channel of the light blind apparatus which concerns on embodiment of this invention. The expanded sectional view which shows the example of light reflection in the transparent glass of the light blind apparatus which concerns on embodiment of this invention. The expanded sectional view showing the 1st modification concerning the section shape of the slot of the light blind device concerning the embodiment of the present invention. The expanded sectional view showing the 2nd modification concerning the section shape of the slot of the light blind device concerning the embodiment of the present invention. The front view which shows the 1st modification of the whole view in the groove | channel of the light blind apparatus which concerns on embodiment of this invention. The front view which shows the 2nd modification of the whole view in the groove | channel of the light blind apparatus which concerns on embodiment of this invention. The figure for demonstrating the modification of the formation area of the groove | channel of the light blind apparatus which concerns on embodiment of this invention.

  Hereinafter, a light blind device according to an embodiment of the present invention and a window configured using the light blind device will be described with reference to the attached drawings. In each of the drawings, the same reference numerals are given to constituent elements in the same manner, and redundant description will be omitted. FIG. 1 shows a window 100 according to an embodiment of the present invention. As shown in FIG. 2, the window 100 includes a transparent glass 11 having a light transmitting flat plate, an LED 12 serving as a light source, and a transparent resin film 21 in the window frame 90 in the configuration of the light blind device according to the embodiment. And at least. The light source emits light to the end face of the flat plate from the continuous position on the line or from the discrete position on the line. In the present embodiment, the light source includes an LED, but a cold cathode fluorescent tube can be used instead of the LED. .

  The thickness of the transparent glass 11 may be, for example, 5 mm, and the transparent glass 11 may be replaced by a transparent acrylic plate or a transparent polycarbonate plate. The LEDs 12 can be LED modules configured by embedding a plurality of LEDs 12 in the substrate 13, and the plurality of LEDs can be arranged at predetermined intervals in the lateral direction of the window frame 90 shown in FIG. 1.

  The transparent resin film 21 can be a transparent polyester film, and the thickness can be, for example, 200 μm. A plurality of embossed grooves 22 are formed on one surface of the transparent resin film 21. The grooves 22 are formed in a plurality in the lateral direction of the window 100 as shown in FIG. 3 (a). In the front view of the transparent resin film 21, as shown in FIG. 4, a plurality of linear grooves 22 are formed in parallel in the vertical direction. The distance L between the grooves 22 can be 1 mm, and the end face can be V-shaped. As shown in FIG. 3 (b), the width W of the V-shaped groove 22 is 0.3 mm, and the angle θ between the groove slope and the perpendicular H to the groove can be 45 degrees to 46 degrees. . This angle is only an example.

  FIG. 5 shows that the distance L between the grooves 22 is 2 mm, the width is 0.3 mm, and the angle between the slope of the groove and the perpendicular H to the groove is 45 degrees to 46 degrees. You may form the groove | channel 22 of such a space | interval in the transparent resin film 21. FIG.

  A polyester film of the same size as the transparent resin film 21 and having a thickness of, for example, 50 μm is attached to the surface of the transparent resin film 21 on which the grooves 22 are formed.

  An adhesive layer coated with an adhesive is provided on the exposed surface of the protective film 23. The adhesive layer can be coated with a release sheet. When sticking the transparent resin film 21 to the transparent glass 11, it is preferable to work as follows. The peeling sheet is peeled off to expose the adhesive layer, and an aqueous solution for adhesion is sprayed on the adhesive layer to prevent inadvertent adhesion from occurring, so that the transparent resin is transparent resin while being made to face the surface of the transparent glass 11 The air between the film 21 and the transparent glass 11 is removed to complete adhesion.

  As shown in FIG. 2, in the state where the end face of the transparent glass 11 to which the transparent resin film 21 is stuck is positioned close to the light emitting surface of the LED 12 provided on the window frame 90, a spacer and fixing parts not shown Is made to act between the window frame 90 and the transparent glass 11 to which the transparent resin film 21 is stuck, and the transparent glass 11 is fixed.

  A voltage is supplied to the LED 12 through a wire (not shown), and a switch (not shown) is provided as a control means for turning on / off the LED 12 in the middle of the wire. The switch (not shown) may be provided at a required portion of the window frame 90 or at a required position in the room. The control means may have a light control function. When the light control function is provided, an operation means such as a volume is provided.

  The light blind device or window 100 configured as described above operates as follows. When the above switch is turned on, the LED 12 is turned on, and the light is incident from the end face of the transparent glass 11 and travels in the transparent glass 11. At this time, the incident angle to the transparent glass 11 is nearly 0 degree, so most of the light emitted from the LED 12 travels into the transparent glass 11. Since the refractive indexes of the transparent glass 11 and the transparent resin film 21 are substantially the same, light traveling from the transparent glass 11 to the transparent resin film 21 goes straight as shown in FIG.

  Here, since the groove 22 is formed on the surface on which the groove 22 of the transparent resin film 21 is formed, light having traveled through the transparent resin film 21 is input to the inclined surface of the groove 22 as shown in FIG. Do. It is considered that air is contained in the recess of the groove 22. Therefore, the transparent resin film 21 which is an optically dense medium and the air which is an optically sparse medium are in contact with each other with the inclined surface of the groove 22 as a boundary. It is known that, for light incidence from an optically dense medium to an optically sparse medium, the angle of refraction is greater than the angle of incidence. It is also known that total reflection occurs as shown in FIG. 6 when the angle of refraction exceeds 90 degrees.

  Considering the positional relationship between the LED 12 as a light source and the inclined surface of the groove 22, a light beam traveling from the transparent glass 11 to the transparent resin film 21 is nearly parallel to the bonding surface of the transparent glass 11 and the transparent resin film 21. For this reason, it is predicted that the incident angle of light reaching the inclined surface of the groove 22 is larger than the critical angle of total reflection. Much of the light beam traveling from the transparent glass 11 to the transparent resin film 21 and reaching the inclined surface of the groove 22 is totally reflected and emitted to the outside as glare light (glare light). In FIG. 6, the refraction of light emitted from the transparent resin film 21 to the outside (air) is not shown.

  On the other hand, consider light which is emitted from the LED 12, enters from the end face of the transparent glass 11, travels in the transparent glass 11, and reaches the surface of the transparent glass 11 to which the transparent glass 11 and the transparent resin film 21 are not bonded. This light beam is nearly parallel to the surface of the transparent glass 11 as shown in FIG. In FIG. 7, the grooves 22 of the transparent resin film 21 are not shown.

  For this reason, the light reaching the surface of the transparent glass 11 to which the transparent resin film 21 is not attached is totally reflected from the absence of the transparent glass 11 and returns to the inside of the transparent glass 11 to the inclined surface of the groove 22 shown in FIG. It is predicted to follow a light path close to the light going to. That is, most of the light beams emitted from the LED 12 and traveling from the end face of the transparent glass 11 to the inside of the transparent glass 11 are emitted as glare light to the outside. As a result, when the transparent glass 11 is viewed from the surface from which light is emitted, the other side can not be viewed, and the light blind device or the window 100 can function as a blind.

  On the other hand, when the switch is turned off, the LED 12 is turned off and no light is emitted from the LED 12. Therefore, glare does not occur and the other side can be seen when the transparent glass 11 is viewed. As described above, it is convenient for the user to realize the light transmission state and the light non-transmission state at will.

  In the above embodiment, although the LED array is provided on the lower end surface of the transparent glass 11, the light emitted from the LED 12 and traveling in the transparent glass 11 is attenuated. An array may be provided. That is, the structure of FIG. In this way, the blind effect can be appropriately generated even on the upper side of the transparent glass 11.

  Further, in the above-described embodiment, the grooves of the spacing shown in FIG. 2 are formed to have a constant size, with the spacing of the grooves 22 being constant, and then the grooves having the spacing shown in FIG. Also good. Alternatively, the grooves of the spacing shown in FIG. 2 may be dimensioned, and then the grooves of the spacing shown in FIG. 3 may be dimensioned, and then, the grooves of the spacing shown in FIG. It is also possible to repeat patterns with different intervals, such as forming. In addition, grooves with a groove spacing of 3 or more may be repeated by a fixed size. Alternatively, it may be formed gradually wider or gradually narrower.

  Further, the cross-sectional shape of the groove may be semi-circular or elliptical as shown in FIG. 8 other than V-shaped, or may be plate-like as shown in FIG. In the dish shape, the bottom surface 31 and the inclined portions 32 and 33 are provided. In any case, as described with reference to FIG. 6, it may be a cross-sectional shape of the groove in which a large amount of light is totally reflected by the inclined surface of the groove 22.

  Furthermore, although the grooves 22 are formed in a linear shape, one groove 22 may be a recess, and a plurality of dots may be formed on one surface as shown in FIG. 10, or as shown in FIG. It may be formed in a lattice shape. As described above, by forming the groove 22, not only the blinding effect is generated, but also an effect such as "blur" may be provided.

  In the above embodiment, the groove 22 is formed over the entire area of the transparent resin film 21 corresponding to the entire area of the transparent glass 11, but the invention is not limited thereto. That is, the groove 22 may be formed in a predetermined area of the transparent resin film 21.

  A concrete example will be described. As shown in FIG. 12, the area A and the area B are divided by a partition 50. It is assumed that all of the partitions 50 are the transparent glass 11. It makes it impossible for the person who performs the normal action in the area A to see the contents of the area B. The person who usually acts is a person who does not act to look into area B intentionally, such as jumping up or squatting.

  Then, an ordinary person can assume a range of 70 cm above 100 cm from the floor as a visible range as passing through a position separated from the partition 50 by 30 cm to 100 cm. Therefore, the transparent resin film 21 in which the groove 22 is formed in the above-described range of the transparent glass 11 may be attached. In this example, although it is assumed that all of the partitions 50 are the transparent glass 11, it is customary that a part of the partitions 50 is a window or the like, and in this case the dazzling effect is It will stick the transparent resin film 21 which it has.

  The shape and position of the region where the groove 22 is to be formed, the range of the region where the groove 22 is to be formed relative to the surface of the transparent resin film 21, and the number of regions where the groove 22 is to be formed may be changed appropriately.

11 transparent glass 13 substrate 21 transparent resin film 22 groove 23 protective film 31 bottom 32 inclined portion 90 window frame 100 window

Claims (10)

A translucent flat plate,
A light source for emitting light to the end face of the flat plate from continuous positions on the line or from discrete positions on the line;
A transparent resin film having a surface on which a plurality of embossed grooves are formed, and the surface on which the grooves are formed is attached to one surface of the flat plate;
Control means for turning on / off the light source;
An optical blind device comprising:   The light blind device according to claim 1, wherein the light source comprises an LED or a cold cathode fluorescent tube.   2. The light blind device according to claim 1, wherein the grooves are formed such that the distance is constant or gradually wide from one end side or gradually narrow from one end side.   The light blind device according to claim 1, wherein the grooves are formed at predetermined intervals, at predetermined widths, gradually widenings, or gradually narrowings.   The light blind device according to any one of claims 1 to 3, wherein the cross-sectional shape of the groove is formed in a V shape, or in a semicircular or elliptical shape, or in a dish shape. .   The optical blind device according to any one of claims 1 to 4, wherein a groove is formed over the entire area of the transparent resin film or in a predetermined area of the transparent resin film.   The said light source was provided in the at least 1 end surface of the said flat plate, The light-blind apparatus of any one of the Claims 1 thru | or 5 characterized by the above-mentioned.   The said transparent resin film is a polyester film or a polypropylene film, The light-blind apparatus of any one of the Claims 1 thru | or 6 characterized by the above-mentioned.   The said flat plate is a glass plate, an acrylic board, or a polycarbonate board, The light blind apparatus of any one of the Claims 1 thru | or 7 characterized by the above-mentioned. A window configured using the light blind device according to any one of claims 1 to 8, which is a window
A window provided with at least a flat plate, a light source, and a transparent resin film in the configuration of the light blind device according to any one of claims 1 to 8 in a window frame.

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