JP2023018370A - Shutter device and game machine - Google Patents

Abstract

To provide a shutter device which can switch the possibility of visual recognition of a display object with a simple configuration.SOLUTION: A shutter device comprises: light sources (3-1 to 3-n); a light guide plate 2 which is arranged on the front surface side of a display object 6; and a control unit 5 which controls turn-on or turn-off of the light sources. The light guide plate 2 has a plurality of prisms 11 which are arranged in individual regions (21-1 to 21-n) provided on one surface 2b and reflect light emitted from the light sources and incident in the light guide plate 2 from an incidence surface 2c such that the reflected light is emitted from the front surface of the light guide plate 2. The light intensity of the light emitted from the light sources and the arrangement density of each prism 11 are set such that the luminance on the front surface 2a of the light guide plate 2 of the light emitted from the light sources, reflected by each prism 11 and emitted from the front surface of the light guide plate 2 becomes larger than the luminance on the front surface 2a of the light guide plate 2 of the light emitted from the display object 6 and passing through the light guide plate 2 toward the front surface 2a from the back surface 2b of the light guide plate 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a shutter device that implements a visual shutter using a light guide plate, and a game machine having such a shutter device.

A technique has been proposed in which a liquid crystal panel is used as a visual shutter in order to enable a user to switch whether or not to visually recognize a predetermined object (see Patent Document 1, for example).

JP 2015-196066 A

When the liquid crystal panel is used as a visual shutter, the structures of the liquid crystal panel and the driving circuit for driving the liquid crystal panel are complicated, so the structure of the shutter itself and the control of the shutter are complicated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a shutter device capable of switching whether or not a display object is visible with a simple configuration.

A shutter device is provided as one form of the present invention. This shutter device includes at least one light source, a light guide plate arranged in front of a display object, formed of a transparent member, and having an incident surface facing the at least one light source, and lighting of the at least one light source. Alternatively, it has a control unit that controls turning off. The light guide plate is arranged along each of at least one region provided on one surface of the light guide plate, and is arranged along each of the regions. A light guide plate that has a plurality of prisms that reflect light incident thereon so that it is emitted from the front of the light guide plate, and that emits light from at least one light source, is reflected by the plurality of prisms, and is emitted from the front of the light guide plate. The luminous intensity of the light emitted from at least one light source is greater than the brightness in front of the light guide plate due to the light emitted from the display object and transmitted through the light guide plate from the back side to the front side of the light guide plate. and the arrangement density of a plurality of prisms is set.
By having such a configuration, the shutter device can switch whether or not the display object is visible with a simple configuration.

In this shutter device, any one of the at least one area on the light guide plate is displayed by the light emitted from the light source corresponding to the area of the at least one light source and entering the light guide plate from the incident surface. A predetermined pattern is formed, and it is preferable that the arrangement density of the plurality of prisms in the predetermined pattern is different from the arrangement density of the plurality of prisms outside the predetermined pattern.
By having such a configuration, the shutter device can display a pattern in an area where the light source is turned on to obstruct the visual recognition of the display object.

Further, according to another aspect of the present invention, a game machine main body, a display object provided on the side of the game machine main body facing the player, a shutter device arranged closer to the player than the display object, A game machine having an effect control device for outputting a control signal corresponding to a game state to a shutter device is provided. In this game machine, the shutter device includes at least one light source, a light guide plate disposed closer to the player than the display object, formed of a transparent member, and having an incident surface facing the at least one light source, It has a control part which controls lighting or extinguishing of at least one light source according to the control signal received from the production|presentation control apparatus. The light guide plate is arranged in each of at least one region provided on one surface of the light guide plate. It has a plurality of prisms that reflect incident light so that it is emitted from the player-side surface of the light guide plate, and is emitted from at least one light source, reflected by the plurality of prisms, and emitted from the player-side surface of the light guide plate. The luminance on that surface of the light guide plate due to the light emitted from the light guide plate is changed by the light emitted from the display object and transmitted through the light guide plate from the display object side surface to the player side surface of the light guide plate. The luminous intensity of light emitted from at least one light source and the arrangement density of the plurality of prisms are set so as to be greater than the luminance on the surface.
By having such a configuration, this gaming machine can switch visibility of a display object provided in the gaming machine with a simple configuration.

1 is a schematic configuration diagram of a shutter device according to one embodiment of the present invention; FIG. It is a schematic side view of a shutter device. 4 is a schematic front view of a light guide plate included in the shutter device; FIG. 4 is a schematic side cross-sectional view of the light guide plate taken along the line indicated by arrow AA' in FIG. 3; FIG. It is a schematic front view of a light guide plate according to a modification. FIG. 11 is a schematic front view of a light guide plate according to another modified example; It is a schematic perspective view of a pinball game machine having a shutter device according to an embodiment or a modified example.

The shutter device will be described below with reference to the drawings. This shutter device has a light guide plate made of a plate-shaped material transparent to light emitted from one or more light sources, and the light guide plate is arranged between a display object and an observer. At least one of the two surfaces of the light guide plate, which surrounds the surface facing the viewer (hereinafter referred to as the front surface), is formed as an incident surface facing the light source. On the other hand, a plurality of prisms are formed on the surface of the light guide plate facing the display object (hereinafter referred to as the back surface). The plurality of prisms reflect light emitted from the light source and incident on the light guide plate so as to be emitted from the front of the light guide plate toward the viewer. When the light source is turned off, the observer can visually recognize the display object through the light guide plate. On the other hand, when the light source is turned on, the light from the light source is reflected by the prisms and reaches the viewer. Further, the brightness in front of the light guide plate due to the light emitted from the light source and reflected by the plurality of prisms of the light guide plate and reaching the observer is set to be higher than the brightness in front of the light guide plate due to light emitted from the display object. , the luminous intensity of the light emitted from the light source and the arrangement density of each prism are set. Therefore, when the light source is turned on, the light from the light source is brighter than the light from the display object as seen from the observer, and as a result, the observer cannot see the display object.

FIG. 1 is a schematic configuration diagram of a shutter device according to one embodiment of the present invention. FIG. 2 is a schematic side view of the shutter device. The shutter device 1 includes a light guide plate 2, a plurality of light sources 3-1 to 3-n (n is an integer of 2 or more, 5 in the illustrated example), a plurality of collimating lenses 4-1 to 4-n, and a control circuit 5;

The light guide plate 2 is a plate-shaped member that is transparent to the light emitted from each of the plurality of light sources 3-1 to 3-n. The light guide plate 2 is formed by molding a resin transparent to visible light, such as polymethylmethacrylate (PMMA), polycarbonate, or cycloolefin polymer. The light guide plate 2 is arranged so that the front surface 2 a of the light guide plate 2 faces the viewer P and the back surface 2 b of the light guide plate 2 faces the display object 6 . Also, the front surface 2a and the rear surface 2b of the light guide plate 2 are divided into a plurality of regions 21-1 to 21-n. Each region 21-i (i=1, . . . , n) corresponds to the light source 3-i among the plurality of light sources 3-1 to 3-n. One of the side surfaces of the light guide plate 2 is formed as an incident surface 2c. A light plate 2 is arranged.

While any one of the plurality of light sources 3-1 to 3-n is lit, the light guide plate 2 internally propagates the light emitted from the lit light source and entering the light guide plate 2 from the incident surface 2c. Let Then, the light guide plate 2 directs the light to the observer P positioned on the front side by the prisms arranged in the area corresponding to the light source being lit among the plurality of prisms (details will be described later) formed on the back surface 2b. reflect towards. As a result, the area corresponding to the lighting light source appears to shine with the light from the light source, and the observer P visually recognizes the display object 6 provided on the back side of the light guide plate 2 through the area. I can't do it. On the other hand, each area provided on the light guide plate enables the observer P to visually recognize the display object 6 provided on the back side of the light guide plate 2 through the area when the corresponding light source is turned off. .
Details of the light guide plate 2 will be described later.

Each of the plurality of light sources 3-1 to 3-n has at least one light emitting element that emits visible light. In this embodiment, the plurality of light sources 3-1 to 3-n are arranged to face an incident surface 2c formed on one side surface of the light guide plate 2 with collimator lenses 4-1 to 4-n interposed therebetween. placed in

A light-emitting element included in each light source is, for example, a light-emitting diode. The luminous intensity of the light emitted from each light emitting element of each of the plurality of light sources 3-1 to 3-n may be the same, or may be different from each other. Also, the color of light emitted from each light emitting element may be the same, or may be different between light sources.

While the control circuit 5 is lighting any one of the plurality of light sources 3-1 to 3-n, light emitted from the lighting light source corresponds to that light source among the collimator lenses 4-1 to 4-n. After being collimated through a collimating lens, the light enters the light guide plate 2 through the incident surface 2c. After the incident light propagates through the light guide plate 2, it is reflected by each prism provided in the region corresponding to the light source during lighting among the plurality of prisms provided on the back surface 2b of the light guide plate 2. is emitted from the front surface 2a. Therefore, from the observer P positioned on the front side of the light guide plate 2, among the regions 21-1 to 21-n provided on the light guide plate 2, the regions corresponding to the lighting light sources appear to shine. Furthermore, the luminance at the front surface 2a of the light guide plate 2 due to the light from the plurality of light sources 3-1 to 3-n as seen from the assumed position of the observer P is emitted from the display object 6 and the light guide plate 2 is projected from the rear surface. The arrangement density of the prisms in each region and the luminous intensity of the light emitted from these light sources are set so that the luminance at the front surface 2a of the light guide plate 2 due to the light transmitted from 2b toward the front surface 2a is greater than that. Therefore, it becomes difficult for the observer P to visually recognize the display object 6 through the area corresponding to the lit light sources due to the light from the lit light sources among the plurality of light sources 3-1 to 3-n. . The assumed position of the observer P can be, for example, a position about several tens of centimeters away from the center of the front surface 2a of the light guide plate 2 along the normal direction of the front surface 2a.

The collimator lenses 4-1 to 4-n are arranged between the light sources 3-1 to 3-n and the incident surface 2c of the light guide plate 2. FIG. The collimator lenses 4-i (i=1, . . . , n) collimate the light emitted from the corresponding light source 3-i and direct it to the incident surface 2c. The collimating lenses 4-1 to 4-n may be refractive lenses or diffractive lenses. Also, the collimating lenses 4-1 to 4-n may be formed so as to collimate the light emitted from the light sources 3-1 to 3-n only in the longitudinal direction of the incident surface 2c. In this case, the collimating lenses 4-1 to 4-n have positive refractive power in the longitudinal direction of the incident surface 2c, while the thickness direction of the light guide plate 2, that is, from the back surface 2b to the front surface 2a. It may be formed as a cylindrical lens with no refractive power in the direction.

The control circuit 5 is an example of a control unit, and includes, for example, a processor, a memory, a drive circuit for driving the plurality of light sources 3-1 to 3-n, and a communication interface for communicating with other devices. have The control circuit 5 controls lighting and extinguishing of the plurality of light sources 3-1 to 3-n in accordance with shutter control information received from another device or pre-stored in the memory.

For example, when the observer P can see the display object 6 through any one of the regions 21-1 to 21-n provided on the light guide plate 2, the control circuit 5 uses a plurality of light sources. The light source corresponding to the visible region among 3-1 to 3-n is turned off, and the light source corresponding to each region other than the visible region is turned on. Further, when the entire display object 6 is to be visible to the observer, the control circuit 5 turns off all of the plurality of light sources 3-1 to 3-n. Furthermore, when the entire display object 6 is hidden from the observer, the control circuit 5 turns on all of the plurality of light sources 3-1 to 3-n. The control circuit 5 selects a combination of light sources among the plurality of light sources 3-1 to 3-n to be lit according to the shutter control information sequentially received from other devices, that is, the display object 6 is made invisible to the observer P. You may change the combination of the area|region which carries out sequentially.

The display object 6 is arranged on the back side of the light guide plate 2, and the observer P can visually recognize the display object 6 through the light guide plate 2 when each light source of the shutter device 1 is turned off. . The display object 6 may be a stationary object such as a fixed accessory provided in the game machine, or may be an object partially movable. Furthermore, the display object 6 may be an object, such as a liquid crystal display, whose displayed content can be changed.

Details of the light guide plate 2 will be described below.

FIG. 3 is a schematic front view of the light guide plate 2. FIG. 4 is a schematic side cross-sectional view of the light guide plate 2 taken along the line indicated by arrow AA' in FIG. As shown in FIGS. 3 and 4, one side surface of the light guide plate 2 is formed as an incident surface 2c facing the plurality of light sources 3-1 to 3-n. As described above, light emitted from each of the plurality of light sources 3-1 to 3-n enters the interior of the light guide plate 2 from the incident surface 2c through the collimating lenses 4-1 to 4-n. Light from each of the plurality of light sources 3-1 to 3-n, which has propagated through the light guide plate 2, is transmitted to the region corresponding to the light source among the plurality of prisms 11 formed on the back surface 2b of the light guide plate 2. After being totally reflected by each prism 11 arranged inside, the light is emitted from the front surface 2a of the light guide plate 2 toward the observer P. As shown in FIG. For example, the light emitted from the light source 3-1 is collimated by the collimating lens 4-1 and enters the light guide plate 2 through the incident surface 2c. The light is emitted toward the observer P from the front surface 2a of the light guide plate 2. As shown in FIG.

Each of the plurality of prisms 11 is formed, for example, as a substantially triangular groove having a predetermined length and a predetermined depth on the rear surface 2b. Each of the plurality of prisms 11 has a reflecting surface forming a predetermined angle with respect to the back surface 2b. The predetermined angle is set so that the light from the corresponding light source that has entered the light guide plate 2 is totally reflected and directed toward the front surface 2a, for example, 40° to 50° with respect to the rear surface 2b. be. Further, the predetermined length is such that a plurality of prisms can be arranged in each of the regions 21-1 to 21-n and the observer P cannot identify the individual prisms 11. For example, about 100 μm to several mm. is set to Further, the predetermined depth is also set to a length such that the individual prisms 11 cannot be identified by the observer P, for example, several tens of micrometers to several hundreds of micrometers.

In each of the regions 21-1 to 21-n, the plurality of prisms 11 are arranged in a lattice pattern or a zigzag pattern, for example. Furthermore, each of the plurality of prisms 11 is formed such that the reflecting surface faces the incident surface 2c. Therefore, each prism 11 reflects the light emitted from the corresponding light source and propagating through the light guide plate 2 toward the front side. From the observer P's point of view, the areas 21-1 to 21-n corresponding to the lit light sources appear to be shining. As a result, the shutter device 1 can make the display object 6 located on the back side of the light guide plate 2 invisible through the area corresponding to the light source that is on.

FIG. 5 is a schematic front view of the light guide plate 2 showing the arrangement of each prism 11 according to a modification. In the example shown in FIG. 5, collimator lenses 4-1 to 4-n are omitted. Further, each of the plurality of prisms 11 is arranged such that its reflective surface directly faces the light source corresponding to the region in which the prism 11 is arranged among the regions 21-1 to 21-n. That is, the individual prisms 11 are arranged concentrically around the light source corresponding to the area where the prisms 11 are arranged. For example, the individual prisms 11 provided within the region 21-1 are arranged concentrically around the light source 3-1. As a result, for each of the regions 21-1 to 21-n, the light emitted from the light sources corresponding to the other regions and propagating through the light guide plate 2 is directed to the reflecting surfaces of the individual prisms 11 arranged in that region. The angle of incidence increases. Therefore, the light emitted from the light source corresponding to the other area is reflected by the prism 11 and emitted from the front surface 2a to the outside of the light guide plate 2 with a large emission angle, and does not go to the observer P. For example, as indicated by an arrow 501, the prisms emitted from the light source 3-1 corresponding to the region 21-1 propagate through the light guide plate 2 and arranged in the region 21-2 adjacent to the region 21-1. The light reaching 11 is reflected in a direction greatly deviating from the front direction of the light guide plate 2 . Therefore, when the light source corresponding to the specific area is lit so that the display object 6 cannot be visually recognized in the specific area, it is possible to prevent the display object 6 from becoming invisible in areas other than the specific area. be.

It should be noted that the size of each prism and the thickness of the light guide plate 2 are exaggerated in FIGS.

Regarding the areas 21-1 to 21-n of the light guide plate 2, the arrangement density of the prisms 11 in the entire area is determined so that the observer P is positioned on the back side of the light guide plate 2 when the light source corresponding to the area is turned off. It is preferable to set the display object 6 to be viewed through a transparent member or through an empty space. For example, the haze value that represents the ratio of diffused light to the total transmitted light in the light guide plate 2 is the haze value that is felt when the display object 6 is viewed through a transparent member or through an empty space. It is preferable that the arrangement density of the prisms 11 in each area is determined so as to be equal to or less than the upper limit of the value. On the other hand, the lower the arrangement density of the prisms 11, the lower the utilization efficiency of the light from each light source. Therefore, if the arrangement density of the prisms 11 is too low, the observer P will be able to visually recognize the display object 6 through the light guide plate 2 even if each light source is turned on, which is not preferable. Therefore, the closer the arrangement density of the prisms 11 is to the upper limit of the haze value, the better. For example, if the arrangement density of the prisms 11 corresponding to the upper limit of the haze value of 28% is 30% under predetermined conditions, the arrangement density of the prisms 11 is set to, for example, 20% to 30%. is preferred.

As explained above, this shutter device has a light guide plate arranged between the viewer and the display object. A plurality of prisms are arranged in each of the plurality of regions provided on the light guide plate. The light emitted from the light source that illuminates the area and enters the light guide plate is reflected toward the front side by the prisms, so that the area appears to shine. As a result, visibility of the display object arranged on the back side of the light guide plate is hindered. On the other hand, the observer can visually recognize the display object through the area of the light guide plate corresponding to the turned-off light source. In particular, the brightness at the front of the light guide plate due to the light emitted from the light source and reflected by the plurality of prisms of the light guide plate is the brightness at the front of the light guide plate due to the light emitted from the display object and transmitted from the back to the front of the light guide plate. The luminous intensity of the light emitted from the light source and the arrangement density of each prism are set so as to be greater than . Therefore, when the light source is turned on, the light from the light source is brighter than the light from the display object as seen from the observer, and as a result, the observer cannot see the display object. In this manner, this shutter device can switch whether or not the display object is visible with a simple configuration.

According to a variant, the light guide plate 2 may be provided with only one region. In this case, the number of light sources may be one. By switching the light source between off and on, the shutter device can switch between making the display object 6 visible through the entire light guide plate 2 and making the display object 6 invisible.

According to another modification, in one or more of the individual regions 21-1 to 21-n of the light guide plate 2, each prism 11 may be arranged along a specific pattern. In this case, the shutter device 1 can make the shape of the region in which the corresponding light source is lit correspond to the pattern in which the prisms 11 are arranged so that the display object 6 is obstructed from being viewed.

Furthermore, in one or more of the individual regions 21-1 to 21-n of the light guide plate 2, the arrangement density of the prisms 11 arranged in a specific pattern and the arrangement density of the prisms 11 arranged outside the specific pattern The arrangement density of the prisms 11 may be different. For example, the prisms 11 are arranged such that the arrangement density of the prisms 11 within a specific pattern is higher than the arrangement density of the prisms 11 outside the specific pattern. Conversely, the prisms 11 may be arranged such that the arrangement density of the prisms 11 within the specific pattern is lower than the arrangement density of the prisms 11 outside the specific pattern. At that time, by making the size of the prisms 11 within a specific pattern different from the size of the prisms 11 outside the specific pattern, the arrangement density of the prisms 11 can be made different between inside and outside the specific pattern. good too. Furthermore, the arrangement density of the prisms 11 may be varied between specific patterns respectively provided in two or more different regions. By making the arrangement density of the prisms 11 different between the inside and the outside of the specific pattern in this way, when the corresponding light source is turned on, the shutter device 1 can display the display object in the area provided with the specific pattern. 6 can be obscured while the particular pattern can be visible to the observer. Furthermore, the arrangement density of the prisms 11 inside or outside a specific pattern is determined by the light from the corresponding light source, and the brightness in front of the light guide plate 2 is determined by the light from the display object 6, in front of the light guide plate 2. , the shutter device 1 can make the specific pattern and the display object 6 appear to overlap each other.

FIG. 6 is a schematic front view of the light guide plate 2 according to this modification. In this modified example, the light guide plate 2 is divided into five regions 21-1 to 21-5, each region forming a part of the star-shaped patterns 22-1 to 22-3. The arrangement density of the prisms 11 within the star-shaped patterns 22-1 to 22-3 is lower than the arrangement density of the prisms 11 outside these patterns. Therefore, for each of the regions 21-1 to 21-5, the light source corresponding to the region among the light sources 3-1 to 3-5 is turned on, thereby hindering the visibility of the display object 6, and the pattern 22 The portion of -1 to 22-3 formed in that region appears darker than its surroundings. For example, when the light source 3-1 and the light source 3-2 are turned on, the observer cannot visually recognize the display object 6 through the regions 21-1 and 21-2. The pattern 22-1 extending over the area 21-2 can be visually recognized. Thus, according to this modification, the shutter device 1 can not only make the display object invisible, but also display a specific pattern.

According to yet another modification, each of the plurality of light sources 3-1 to 3-n may have a plurality of light emitting elements with emission colors different from each other. Then, the control circuit 5 selects a light emitting element having a luminescent color closest to the color of the display object 6 for the light source corresponding to the area obstructing the visual recognition of the display object 6 among the areas 21-1 to 21-n of the light guide plate 2. may be lit. In this case, the information representing the color of the display object 6 may be included in the shutter control information, and a reference table representing the relationship between the color of the display object 6 and the light-emitting element to emit light may be stored in advance in the memory of the control circuit 5. . Then, the processor of the control circuit 5 may refer to the shutter control information and the reference table to determine the light emitting element to emit light for each light source. According to this modification, even when the display object 6 is an object such as a liquid crystal display that can change the luminescent color of the displayed object, the shutter device can appropriately obstruct the visual recognition of the display object 6 .

The shutter device according to the above embodiment or modification may be installed in a game machine such as a pinball game machine or a reel game machine.
FIG. 7 is a schematic perspective view of the pinball game machine having the shutter device according to the above-described embodiment or modification, viewed from the player side. As shown in FIG. 7, the pinball game machine 100 is provided in most of the area from the upper part to the central part, and includes a game board 101 which is the main body of the game machine and a ball receiving part arranged below the game board 101. 102, an operation unit 103 having a handle, a liquid crystal display 104 provided on the side facing the player in the approximate center of the game board 101, and a shutter device 105 arranged in front of the liquid crystal display 104. .

In addition, the pinball game machine 100 has an accessory 106 arranged below the game board 101 or around the shutter device 105 on the front surface of the game board 101 for game presentation. A rail 107 is arranged on the side of the game board 101 . A large number of obstacle nails (not shown) and at least one winning device 108 are provided on the game board 101 .

The operation unit 103 shoots a game ball with a predetermined force from a shooting device (not shown) according to the amount of rotation of the handle by the player's operation. The shot game ball moves upward along the rail 107 and falls between many obstacle nails. When a sensor (not shown) detects that a game ball has entered one of the winning devices 108, a main control circuit (not shown) provided on the back of the game board 101 detects that the game ball has entered the winning device 108. A predetermined number of game balls are put out to the ball receiver 102 through a ball put-out device (not shown). Further, the main control circuit drives the liquid crystal display 104 and the shutter device 105 via a performance CPU (not shown) provided on the back of the game board 101 . The performance CPU is an example of a performance control device, and outputs a control signal including shutter control information according to the game state to the shutter device 105 .

The shutter device 105 is an example of the shutter device according to the above-described embodiment or modification. It is attached to the game board 101 on the front side, that is, on the player side. The control circuit of the shutter device 105 switches between lighting and extinguishing of each light source in accordance with the shutter control information included in the control signal from the production CPU, so that the player can control the shutter device 105 provided on the back side. The visibility of the image displayed on the liquid crystal display 104 is switched. Note that the liquid crystal display 104 is an example of a display object.

Thus, a person skilled in the art can make various modifications within the scope of the present invention according to the embodiment.

1 shutter device 2 light guide plate 2a front surface 2b rear surface 2c incident surface 3-1 to 3-n light source 4-1 to 4-n collimator lens 11 prism 21-1 to 21-n area 22-1 to 22-3 pattern 5 control Circuit 100 Pinball game machine 101 Game board 102 Ball receiver 103 Operation unit 104 Liquid crystal display (display object)
105 shutter device 106 accessory 107 rail 108 winning device

Claims (3)

at least one light source;
a light guide plate disposed on the front side of the display object, formed of a transparent member, and having an incident surface facing the at least one light source;
a control unit that controls lighting or extinguishing of the at least one light source;
has
The light guide plate is arranged along each of at least one region provided on one surface of the light guide plate, and the light source corresponding to the region among the at least one light source emits light from the light source corresponding to the region. having a plurality of prisms that reflect light entering the light guide plate from a surface so that the light is emitted from the front surface of the light guide plate;
The luminance at the front surface of the light guide plate due to the light emitted from the at least one light source and reflected by the plurality of prisms and emitted from the front surface of the light guide plate varies from the display object to the back surface to the front surface of the light guide plate. The luminous intensity of the light emitted from the at least one light source and the arrangement density of the plurality of prisms are set so as to be higher than the brightness in front of the light guide plate due to the light transmitted through the light guide plate toward the light guide plate.
shutter device. In any one of the at least one area of the light guide plate, display is performed by light emitted from the light source corresponding to the area of the at least one light source and incident on the light guide plate through the incident surface. 2. The shutter device according to claim 1, wherein a predetermined pattern is formed, and an arrangement density of said plurality of prisms within said predetermined pattern is different from an arrangement density of said plurality of prisms outside said predetermined pattern. a gaming machine body;
a display object provided on the side facing the player of the gaming machine main body;
a shutter device arranged closer to the player than the display object;
a performance control device that outputs a control signal corresponding to the state of the game to the shutter device;
The shutter device
at least one light source;
a light guide plate disposed closer to the player than the display object, formed of a transparent member, and having an incident surface facing the at least one light source;
A control unit that controls lighting or extinguishing of the at least one light source according to the control signal received from the production control device;
has
The light guide plate is arranged in each of at least one region provided on one surface of the light guide plate, and light emitted from a light source corresponding to the region of the at least one light source emits light from the incident surface. a plurality of prisms that reflect light incident on the light guide plate from the light guide plate so as to be emitted from the player-side surface of the light guide plate;
The light emitted from the at least one light source, reflected by the plurality of prisms, and emitted from the player-side surface of the light guide plate has a brightness on the surface of the light guide plate that is emitted from the display object and emitted from the light guide plate. Light transmitted through the light guide plate from the display object side surface to the player side surface of the at least one light source so as to be greater than the brightness on the player side surface of the light guide plate the luminous intensity of light and the arrangement density of the plurality of prisms are set;
game machine.

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