JP2003117048A - Indicating device and line switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor face indicating device capable of easily, quickly and selectively indicating a line of a desired court on a floor face in accordance with the necessity. SOLUTION: A light guide material 3 emitting the light by a light source 3 or an indicating member 13 having the light source 4 is mounted at a lower side of a protective material 6 having a surface approximately flush with the floor face A, and transmitting the linear light. The light source 4 is electrically controlled to selectively indicate the line on the floor face A through the protective material 6. Three primary colors are used in the light source 4 to indicate the line of the desired color. Further the line can be indicated without using the light source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor display device for an indoor stadium, and more particularly, to an electric line for electrically selecting a desired court line selected from a plurality of various competition lines drawn on the floor. The present invention relates to a floor display device capable of displaying.

[0002]

[Prior Art] In general indoor stadiums such as gymnasiums,
Various competition lines are drawn in an overlapping manner as shown in FIG. 11, for example.

That is, a center line is drawn in the center of a line L2 of a rectangular outer frame for basketballs, a basketball goal area line is drawn on each short side, and an inside of the outer frame line L2 is drawn. , A smaller volleyball line L1 etc. is drawn,
Lines for each competition are mixed.

Since these lines L1, L2, etc. are drawn in a size determined for each competition in an overlapping manner, in the present situation,
Different colors are used to distinguish each competition.

[0005]

[Problems to be Solved by the Invention] However, in the case of official competition, the line must be drawn in the color specified in the official rule. For this reason, we have responded by newly affixing colored tapes, etc. based on the official rules on the already drawn lines.

[0006] In addition, the other competition lines which are not used are hidden by applying a tape of the same color as the floor so as not to hinder the official competition.

As described above, changing the colors of the lines L1, L2, etc. requires a great deal of labor, and also requires a lot of time and effort to peel off the attached tape after the competition, and it becomes necessary to discard a large amount of tape. However, there were issues such as not being economical.

The present invention has been proposed in view of the above, and an object thereof is to provide a floor on which a desired coat line can be selectively displayed on the floor surface easily and quickly as needed. An object is to provide a surface display device.

[0009]

According to the present invention, a floor 6 has a surface substantially flush with the surface A, is provided in a line, and has a light-transmitting protective material 6, and a protective material 6 is provided below the protective material 6. A light control material 5 that can be switched to transparent or semi-transparent, a light guide material 3 provided below the light control material 5 to which light is incident, and provided on a side portion of the light guide material 3 for guiding light. The material 3 is provided with a large number of light sources 4 capable of emitting light, and a line is displayed on the floor surface A through the transparent light control material 5 when the light source 4 is turned on, thereby achieving the above object. .

Further, two or more kinds of competition courts are constructed by using the line composed of this display device, and the power source 8 and the light source power source device 10 to which the power source 8 is supplied and which drives the light source 5 The light source power supply device 11 for turning on the light source 4 and the line control switch 12 inserted between the light control material power supply device 10 and the light source power supply device 11 and the light control material 5 and the light source 4 are provided. 12, the lines of each coat are selectively displayed.

In the display device, the floor A is substantially flush with the surface A, the protective material 6 is provided in a line shape and transmits light, and a large number of red, green and blue light sources are provided below the protective material 6. 4 is provided, the light source 4 of the display member 13 can selectively emit light, and lines are displayed outside through the protective material 6.

Two or more kinds of competition courts are constructed by using the line composed of the display device, and the power source 8, the power source device 15 to which the power source 8 is supplied, and the power source through the power source device 15 are red. , The light source 4 of each color of green, blue is uniformly turned on, and the light emission color “white” setting circuit 16 and the light emission color selection circuit 17 of turning on only the light source 4 of a predetermined color among the light sources 4 of the respective colors are lightened. The light emission color “white” setting circuit 16 and the light emission color selection circuit 17 and the line changeover switch 18 inserted between the light source 4 of each coat line are provided, and the line changeover switch 18 allows the color of each coat line to be changed. Is selectively displayed.

Further, the display device is provided with a protective member 6 which is substantially flush with the floor surface A and which is provided in a line shape and which transmits light, and is provided below the protective member 6 and can be switched to transparent or semitransparent. The light control material 5 and red, green,
A display member 13 having a large number of light sources 4 for each color of blue,
The light source of the display member 13 can selectively emit light, and the floor surface A is lit through the transparent light control material 5 when the light source 4 is turned on.
The line is displayed above.

Two or more kinds of competition courts are constructed by using the line composed of the display device, and the power source 8, the power source device 15 to which the power source 8 is supplied, and the power source via the power source device 15 are supplied to each color. Of the light source 4 for uniformly lighting the light source 4 and a light-emission color selecting circuit 17 for lighting only the light source 4 of a predetermined color among the light sources 4 of the respective colors so as to be substantially the same color as the floor surface A, A light control material power supply device 15 'for driving the light control material 5, the light emission color "white" setting circuit 16, a light emission color selection circuit 17, a light control material power supply device 15', a light source 4 of each coat line, a light control The line changeover switch 18 inserted between the material 5 and the line changeover switch 1 is provided.
8, the colors of the lines of two or more types of coats are selectively displayed.

Further, the light source 4 is connected to a controller 20 capable of adjusting the amount of light emission so that the light source 4 is turned on.

The floor A is substantially flush with the surface A and is provided in a line, and the light-transmitting protective material 6 is provided. 5 is provided, and the floor material 2 having the same color as the floor surface A is provided below the light control material 5.

The floor A is substantially flush with the surface A, and the protective material 6 is provided in a line and transmits light, and the lower part of the protective material 6 is switched to white or the same color as the floor A. The electronic paper 22 that can be used is provided.
The floor surface A is provided in the lower part of the.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, lines of a plurality of coats are selectively displayed so that they can be seen from the outside, or are made inconspicuous from the floor surface.

As a means thereof, when a large number of light sources 4 are turned on, the light source 4 is selectively turned on or off by switching a switch so that the light sources 4 become linear, and this is realized by an electric control device. ing.

Further, as the light source 4, a monochromatic one or red, green, blue or the like corresponding to the three primary colors is used, and by appropriately lighting them, it is possible to display in a desired color.

Alternatively, the lines can be displayed by a display device having a simple structure without using the light source 4.

[0022]

[Embodiment 1] FIG. 1 is an explanatory view showing an internal structure of a floor display device according to a first embodiment of the present invention.

In the figure, A is a floor such as a gymnasium or an indoor stadium made of concrete or wood, and a display device 1 for displaying a line-like display object on the floor A is provided on the floor A. Is buried.

This display device 1 includes a line-shaped floor material 2 provided on a lower floor B, a light guide material 3 provided thereon, a side portion on the floor material 2, and a light guide material. 3 is provided with a light source 4 provided on a side portion, a light control material 5 provided on the light guide material 3, and a protective material 6 provided thereon.

In other words, from the top, the protective material 6, the light control material 5,
The light guide material 3 and the floor material 2 are laminated in this order, and the surface of the uppermost protective material 6 is substantially flush with the floor surface A. In addition, the width and length of each of these members are based on the court line of the rules of each competition.

The protective member 6 is made of a transparent and strong material such as hard plastic, protects the lower member from the impact of the competition, and allows the lower member to be seen through. Further, the surface is made into a fine uneven surface, or wax is applied to give the same friction effect as that of the floor surface A.

The light control material 5 is made of a member that can be switched between transparent and semi-transparent by turning the electricity off and on. Liquid crystal may be used as such a member. The liquid crystal is constructed by providing a liquid crystal between two transparent electrodes. When a voltage is applied between the two transparent electrodes (ON), the molecules of the liquid crystal are aligned in parallel with the electric field and light is transmitted, and the transparent glass Like When it is turned off, the light is diffused and becomes translucent milky white.

The light guide member 3 is made of transparent or translucent plastic and is a member that guides the light from the light source 4 arranged on the side surface upwards evenly.

The light source 4 is composed of a member such as a light emitting diode which emits light in the color of the line of the court defined in the official rules of each competition, and a large number of light sources are arranged on the side surface of the light guide member 3 along the length direction thereof. ing. In the illustrated example, the light source 4 is provided on either side of the light guide member 3, but may be provided on both sides. When the light source 4 is caused to emit light by energization, the light is made incident and guided into the light guide member 3 to make the light guide member 3 bright.

The floor material 2 is made of the same floor material as the floor surface A. When the floor material A is made of wood, for example, the same wood is used. Further, when the floor coating material is applied to the surface of the floor material A, the lower floor material B may be directly coated to substitute it.

FIG. 2 shows an example of a basic circuit for driving the above-mentioned display device which constitutes a line of a court for competition. The first coat C shown by a block on the upper left side in the figure is for baskets, for example, and shows the light control material 5 of the display device 1 and the light source 4 below the same, which form a line of coat in the block. Further, the second court D shown by the block on the upper right side shows, for example, the light control material 5, the light source 4, etc. of the line for volleyball.
Here, for convenience of description, the protective material 6 provided on the upper part of the light control material 5 and the light guide material 3 provided on the lower part of the light control material 5 shown in FIG. 1 are omitted.

Although FIG. 2 shows the first and second courts C and D, the number of courts is not limited to two and, for example, a tennis court line has the same floor. Of course, it may be added on the surface A.

The light control material 5 and the light source 4 of the display device 1 forming the lines of the first and second coats C and D are connected to the line switching device 7.

This line switching device 7 is for switching to each court for each competition. In this example, the first court C is used.
Alternatively, the light control material 5 of the second coat D and the light source 4 can be selectively displayed.

That is, the line switching device 7 has a power source 8
A power switch 9 for turning on the power source, a power source 8 supplied through the power switch 9, and a dimmer power source device 10 for driving the dimmer material 5, and the light source 4 lighting through the power switch 9. Light source power supply device 11, light control material 5 of first and second coats C and D, and light source 4, and light control material power supply device 10
And a light source power supply device 11, and a multi-contact structure changeover switch 1 for selectively driving the light control material 5 and the light source 4 of the display device 1 of the first coat C or the second coat D.
2 and.

In use, for example, when displaying the line of the second coat D, first turn on the power switch 9,
If the changeover switch 12 is set to the second coat D side, the contact of the light source 4 on the second coat D side of the changeover switch 12 is O.
Because of N, a predetermined current is supplied from the light source power supply device 11 to the light source 4 of the display device 1 on the second coat D side to operate, and the light source 4 emits the color of the line defined by the official rule to guide light. The material 3 is made to emit light in that color. Since the light control material 5 does not pass electricity and is semitransparent, the color of the light guide material 3 that emits light is displayed while hiding the floor surface A so as not to show it, and the line of the volleyball for competition on the second court D. L1 is displayed as shown by the solid line in FIG.

In this case, the light source 4 does not emit light on the first coat C side because the contact of the changeover switch 12 connected to the light source 4 is OFF. Since the light control material 5 becomes transparent by being energized, the color of the floor material 2 or the lower floor B appears on the surface via the transparent light guide material 3 on the lower side and the protective material 6 on the upper layer. Since the color of the floor material 2 or the lower floor B is almost the same as that of the floor surface A, no line appears on the first coat C.

When the changeover switch 12 is changed over from the second coat D side to the first coat C side, the contact point of the changeover switch 12 connected to the light source 4 on the second coat D side is changed from ON to OFF. The light source 4 is turned off. Since the light control material 5 on the side of the second coat D is energized and becomes transparent, the color of the underlayer having almost the same color as the floor surface A is displayed outside and the line is erased.

Since the contact of the changeover switch 12 of the light source 4 on the first coat C side is changed from OFF to ON, the light source 4 emits light and the light guide member 3 emits light of the color of the official line. Light control material 5
Is not energized and becomes semi-transparent, and the competition line L2 is displayed.

In this way, the competition line L1 or L
2 can be easily switched.

When all the lines L1 and L2 are not used, if the power switch 9 which is the main switch is turned off, all the light sources 4 are turned off and no line is displayed.

[0042]

Second Embodiment FIG. 4 shows a second embodiment of the present invention. In this embodiment, the display device 1 embedded in the floor surface A is replaced with the floor material B.
A large number of light sources 4 which are provided above and emit light upward
The band-shaped display member 13 having the above-mentioned structure and the two-layer structure of the surface A and the substantially flush surface protective member 6 laminated on the band-shaped display member 13 are used to remove the light control member 5 in the first embodiment. In addition, the feature is that the line color can be selected.

In this case, the protective member 6 is made of a material such as semi-transparent and strong hard plastic, and protects the lower member from the impact of the competition, and at the same time, the light from the lower display member 13 is transmitted. The light source 4 cannot be identified. Further, the surface of the protective material 6 is made into a fine uneven shape so as to have a friction effect equivalent to that of the floor surface A.

When the floor surface A is made of wood, the protective material 6 and the display member 13 are made of a material having the same impact absorption property as the surrounding floor material as a whole.

A large number of light sources 4 are arranged on the display member 13 below the protective member 6. The light source 4 is composed of light emitting diodes of three primary colors of red, green, and blue, and the amount of light emission can be adjusted. Also, for example, red, green, blue, red, green,
It is arranged alternately with blue.

When the color of the competition line is white and the color of the floor surface A is, for example, green, the white of the competition line can be realized by uniformly emitting light from each of the three types of light-emitting diodes forming the three primary colors. . The color of the floor surface A is based on a green light emitting diode, and the amount of light emitted from the light emitting diodes of other colors may be adjusted to produce a color substantially the same as the floor surface A.

FIG. 5 shows a circuit example of a switching device for switching the color of the line in the second embodiment. The line switching device 14 of the second embodiment is supplied with power through a power source 8, a power switch 9 for turning on the power source, a power source device 15 including a rectifying circuit for rectifying the commercial power source 8, and a power source device 15. Setting circuit 16 for emitting light color, a light emitting color selecting circuit 17 for emitting the same color as the floor surface A when the floor surface A is green, and the setting circuit 16 for emitting light color "white" or the light emitting color selecting circuit A switch 18 having a multi-contact structure for switching the color of a predetermined line to one of the switches 17 is provided, and the switch 18 has the first and second coats C,
D light sources 4 are respectively connected.

The light emission color "white" setting circuit 16 has lines R, G, B for supplying a uniform current to each of the red, green and blue light emitting diodes.
And has a white color. Further, the light emission color selection circuit 17 has lines R and B in which a rated current flows only in the green light emitting diode, and resistors are inserted in the other two color red and blue light emitting diodes such that the colors are not darkened. This allows the color to be set by reducing the voltage.

In use, for example, the second coat D
When using, change switch 18 to the second coat D
When it is turned to the side, the corresponding contact is turned on, a uniform current flows through the red, green, and blue light emitting diodes of all three primary colors through the light emission color “white” setting circuit 16, and the line of the second coat D is white. Becomes

In this case, the light source 4 in the second coat D
The contact of the changeover switch 18 between the light emission color selection circuit 17 and the light emission color selection circuit 17 is OFF.

On the other hand, the contact point of the changeover switch 18 between the light source 4 and the emission color selection circuit 17 in the first coat C is turned on, and the light source 4 in the first coat C emits green light, so that the line is on the floor surface. The color is almost the same as A. Further, in this case, the light source 4 and the emission color “white” in the first coat C are used.
The contact of the changeover switch 18 with the setting circuit 17 is OF
It is F.

Further, when the changeover switch 18 is changed over, the respective contacts are changed over so that the line of the first coat C can be raised and displayed on the floor surface A, and the line of the second coat D can be erased. However, the floor color can be almost the same.

In this embodiment, the emission color selection circuit 1
The case where 7 is made to emit green light is explained, but the floor surface A
When is red or blue, it is of course possible to set it to red or blue.

[0054]

Third Embodiment FIG. 6 shows a third embodiment of the present invention. In this embodiment, the light control material 5 described in the first embodiment is inserted and added between the protective material 6 and the display member 13 in the display device 1 of the second embodiment, and the display member 13 is added. Is characterized in that its upper surface is colored almost the same as the surface of the floor surface A.

As shown in FIG. 7, in the line switching device 19 of the third embodiment, a contact 9'of the power switch 9 is added to that of FIG. 5, and when the switch 9 is turned on, the power 8 is supplied. An optical material power supply device 15 'is added. Further, the light control material power supply device 15 ′ is connected to the light control material 5 of the first and second coats C and D via the contacts 18 a and 18 b to which the changeover switch 18 is added.

When the second coat D is used, the contact 18a of the light control material 5 is turned off and made semitransparent, and the changeover switch 18 is turned on and the light emission color "white" setting circuit 16 is used. A line is displayed by causing the light source 4 on the second coat D side to emit light. When the line is not used, the contact 18a is turned on to make the light control material 5 transparent, and the light source 4 is turned off by switching the changeover switch 18 to turn off the floor. Surface A
The line is erased by the upper surface of the display unit 13 having the same color as that of.

When the second coat D is used and the first coat C is not used, the contact of the changeover switch 18 of the light source 4 on the first coat C side is OFF and the light source 4 is off. Further, the contact 18b of the changeover switch 18 is ON, the light control material 5 of the first coat C is transparent, the display member 13 of substantially the same color as the floor surface A appears, and the line is not displayed.

The third embodiment has the following advantages as compared with the second embodiment shown in FIGS. 4 and 5.

That is, in the second embodiment, for example, the second
Even if the contact on the side of the light emission color “white” setting circuit 16 is turned off to turn off the line of the coat D, the contact on the side of the light emission color selection circuit 17 is turned on from off to turn on the light source 4 on the floor A.
It emits light in almost the same color as, and always uses electricity.

However, in the third embodiment, the second
When the light source 4 is turned off in order to erase the line of the coat D, the light control material 5 is also energized and transparent.
Although you can see one, it has the advantage of not using electricity. Further, since the light control material 5 is semitransparent when not energized, the
Each light can be softened and made uniform.

[0061]

[Embodiment 4] In the line switching device in the second embodiment, the light emission amount of each light source 4 can be freely operated by a controller, and the light emission color and light emission pattern can be variously changed. You can also

As shown in FIG. 8, as the controller, a controller 20 such as a known so-called dimming circuit including a variable resistor is provided, and its output terminal is connected to each light source 4 via the changeover switch 18. Just do it. In this case, a desired emission color can be obtained by controlling the current to each light source 4 via the controller 20.

According to this embodiment, it is possible to display floors other than the competition line.

That is, by embedding a display device that can be driven by the line switching device 21 in a partial area or the entire surface of the floor surface A, various patterns can be displayed on the floor surface A.
For example, it is possible to make the area under the goal of basketball red and display the mascot character of the competition team.

The controller 20 can also be applied to the third embodiment shown in FIG. 7 by replacing the emission color "white" setting circuit 16 and the emission color selection circuit 17 with the controller 20, for example.

In each of the above embodiments, the basketball and volleyball courts have been described as examples. However, the present invention is applied to other tennis court lines, for example, doubles and singles. You can also switch the line to.

[0067]

[Embodiment 5] FIG. 9 shows a case in which the light control material 5 of the first embodiment is of a type that can be switched between transparent and white by turning the power supply on and off. Can be used as a line. When it is turned on and made transparent, the color of the floor material 2 therebelow can be seen, so that the line can be erased. In this example,
The display device 1 is provided with a protective material 6 which is substantially linear with the floor surface A and which is provided in a line shape and which transmits light, and a light control material which can be switched to transparent or white below the protective material 6. 5 is provided, and the floor material 2 having the same color as the floor surface A is provided under the light control material 5. Since there is no light source 4, the line becomes slightly dark, but there is an advantage that the use of electricity can be minimized. .

[0068]

[Embodiment 6] FIG. 10 shows an electronic paper 22 connected to a power source (not shown), which is an ultra-thin display device having a thickness of 1 mm or less, which is provided below a thin protective member 6. In this example, the white line on the floor is displayed or erased by switching to the color A or the grain. That is, the electronic paper 22 is configured by so-called electronic ink technology. Electronic ink, for example, has an infinite array of minute capsules containing particles of white and floor colors, which are sandwiched between two resin films, and which have a voltage of white and floor colors depending on the voltage. Particles are moved up and down, thereby providing a display function. Since the electronic paper 22 is thin, it can be directly attached to the floor surface A and then covered with a non-slip transparent sheet for use, or can be installed on the existing floor surface A. In addition, the electronic paper 22 has a feature of maintaining display even when electricity is cut off. In addition, since the display of the electronic paper 22 is based on the color development of ink, the line itself does not illuminate and hinder the competition. Further, since the electronic paper 22 is a film and thin, it is possible to use the thin protective material 6 to remove the floor surface A.
On the other hand, it can be easily installed almost flush with the floor surface A, and the construction is easy.

[0069]

As described above, according to the present invention described in claims 1 and 2, it is possible to easily and selectively display the line of each coat through the light source 4.

According to the third aspect of the present invention, the main member can have a simple structure having a two-layer structure, and the line of each coat can be easily and selectively displayed through the light source 4.

According to the fourth aspect of the present invention, since the light emission color "white" setting circuit 16 and the light emission color selection circuit 17 are provided, the color of each coat line can be selectively displayed. You can

According to the fifth and sixth aspects of the present invention, it is possible to easily and selectively display the lines of each coat through the light source 4 using the display device having the three-layer structure.

According to the present invention as set forth in claim 7, since the light source 4 is controlled by the controller 20, various emission colors and emission patterns can be obtained in addition to the above effects.

According to the present invention of claim 8, since a light source is used, there is a power saving effect and it is economical.

According to the ninth aspect of the present invention, it is possible to easily perform construction on the floor surface and easily perform desired display.
The line once displayed can be maintained even when the power is turned off, which is economical.

[Brief description of drawings]

FIG. 1 shows an internal structure explanatory diagram of a first embodiment of the present invention.

FIG. 2 shows a basic configuration example of a line switching device used in the first embodiment of the above.

FIG. 3 shows a display example of the display device of the first embodiment.

FIG. 4 shows an internal structure explanatory diagram of a second embodiment of the present invention.

FIG. 5 shows an example of a basic configuration of a line switching device used in the second embodiment.

FIG. 6 shows an internal structure explanatory diagram of a third embodiment of the present invention.

FIG. 7 shows an example of the basic configuration of a line switching device used in the third embodiment.

FIG. 8 shows a basic configuration example of a line switching device according to a fourth embodiment of the present invention.

FIG. 9 shows a configuration example of a fifth embodiment of the present invention.

FIG. 10 shows a configuration example of a sixth embodiment of the present invention.

FIG. 11 shows a conventional example.

[Explanation of symbols]

A floor B lower floor C, D coat 1 Display device 2 floor materials 3 Light guide material 4 light sources 5 Light control material 6 protective material 7 line switching device 8 power supplies 9 power switch 10 Light control device power supply 11 Light source power supply 12 Changeover switch 13 Display member 14 line switching device 15 power supply 15 'dimmer power supply 16 Emission color “white” setting circuit 17 Emission color selection circuit 18 Changeover switch 18a, 18b contact 19 line switching device 20 controller 21 Line switching device 22 Electronic paper

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaki Miyashita             1-24-4 Shinkawa, Chuo-ku, Tokyo Daihoken             Inside the corporation

Claims (9)

[Claims] 1. A protective material (6) having a surface substantially flush with the floor surface (A) and being provided in a line shape, and transmitting light.
A light control material (5) which is provided below the protective material (6) and can be switched between transparent and translucent, and a light guide material () which is provided below the light control material (5) and on which light is incident ( 3) and a large number of light sources (4) provided on the sides of the light guide material (3) and capable of emitting light to the light guide material (3), and are transparent when the light source (4) is turned on. A display device for displaying a line on the floor surface (A) through the light control material (5). 2. A line composed of the display device according to claim 1 is used to form two or more kinds of competition courts, a power source (8), and this power source (8) is supplied, and a light control material (5). Light source power source device (10) for driving the light source and light source power source device (11) for turning on the light source (4), and the light source power source device (10), light source power source device (11) and light source (5) And a line changeover switch (12) inserted between the light source (4) and the line changeover switch (12) for selectively displaying the lines of each coat. 3. A protective material (6) which has a surface substantially flush with the floor surface (A) and which is provided in a line and which transmits light.
A large number of red, green, and blue light sources (4) provided below this
And a display member (13) having
A display device, characterized in that the light source (4) of 3) can selectively emit light and a line is displayed outside through the protective material (6). 4. A power supply (8) and a power supply device (15) to which the power supply (8) is supplied, which comprises two or more kinds of competition courts using the line composed of the display device according to claim 3. Power is supplied through the power supply device (15) to uniformly light the light sources (4) of red, green, and blue colors, and a light emission color “white” setting circuit (16) and the light sources (4) of the respective colors.
Among these, the light emission color selection circuit (17) that brightly lights only the light source (4) of a predetermined color, the light emission color “white” setting circuit (16) and the light emission color selection circuit (17), and the line of each coat A line switching device comprising a line switching switch (18) inserted between the light source (4) and the line switching switch (18) for selectively displaying the color of the line of each coat. 5. A protective material (6) which is substantially flush with the floor surface (A) and which is provided in a line and which transmits light.
A dimmer material (5) provided below this and capable of switching to transparent or translucent, and a display member (13) provided below this and having a large number of red, green and blue light sources (4) The light source (4) of the display member (13) can be selectively made to emit light, and a desired color of a desired color can be displayed on the floor surface (A) through a transparent light control material (5) when the light source (4) is turned on. A display device for displaying lines. 6. A power supply (8) and a power supply device (15) to which the power supply (8) is supplied, which comprises two or more kinds of competition courts using the line composed of the display device according to claim 5. Power is supplied through the power supply device (15) to uniformly light the light sources (4) of the respective colors, and a light emission color “white” setting circuit (16) and a light source of a predetermined color among the light sources (4) of the respective colors ( 4) only the bright color is lit to make the same color as the floor surface (A), a light emission color selection circuit (17), a light control material power supply device (15 ') for driving the light control material (5), and the light emission color ""White" setting circuit (16), emission color selection circuit (17), light control material power supply device (15 ') and light source (4) for each coat line,
A line changeover switch (18) inserted between the light control material (5) and the line changeover switch (18) for selectively displaying the color of each coat line. apparatus. 7. The article according to claim 3 or 5,
Controller (20) capable of adjusting the amount of light emitted from the light source (4)
A display device characterized by connecting and lighting. 8. A protective material (6) which is provided in a line shape and whose surface is substantially flush with the floor surface (A) and which transmits light.
A light control material (5) that can be switched to transparent or white is provided below the protective material (6), and a floor material (2) of the same color as the floor surface (A) is provided under the light control material (5). A display device characterized by being provided. 9. A protective material (6) which is provided in a line shape and whose surface is substantially flush with the floor surface (A) and which transmits light, and a white or floor under the protective material (6). A display device characterized in that an electronic paper (22) that can be switched to the same color as the surface (A) is provided, and the floor surface (A) is provided below the electronic paper (22).