JP4938373B2 - Display device for gaming machine - Google Patents

Description

  The present invention relates to a display device for a gaming machine.

  Conventionally, in various gaming machines including ball and ball game machines such as pachinko machines and alepatchi machines, and revolving type game machines such as slot machines and pachislot machines, jackpots (special gaming state) based on lottery results in the gaming machines, A variety of display devices are used to notify the possibility that the type of the acquired combination is established (preliminary display) or to perform final notification (final display) corresponding to the lottery result. Yes. In a display device using a light emitting element which is a kind of such a display device, the applicant of the present application combines a main display unit (for example, a 7-segment system) that displays a pattern with a surface light emitting unit using a light guide plate. An apparatus was proposed (see Patent Document 1). An example thereof is shown in FIGS.

  The main display unit 110 shown in FIG. 12 and FIG. 13 includes a symbol light emitting element group 111 for displaying symbols composed of numbers, letters, etc. and informing the player, and surrounding each symbol light emitting element in a hollow shape. And a reflector 112 framed to form. The surface light emitting unit 120 includes a light transmissive light guide plate 122 and a light guide plate light emitting element 121. The light guide plate 122 has a main body part 122a that covers the pattern light emitting element group 111 and the reflector 112 of the main display part 110 in a planar shape from the player side, which is the display surface side, and a light emitting pattern from the main body part 122a through the curved part 122c. An extension part 122b extending so as to surround the element group 111 and the reflector 112 is included. The light-emitting element 121 for the light guide plate is disposed outside the pattern light-emitting element group 111 in order to cause the light guide plate 122 to emit light from the end face side of the extension part 122b to emit light. Further, the design light emitting element group 111 and the light guide plate light emitting element 121 are mounted on a single light emitting substrate 104 (common substrate).

Japanese Patent No. 3720835

  As described above, according to the display device shown in FIGS. 12 and 13, it is possible to perform multi-layer light emission display with the main light emission representing the design and the planar light emission of the light guide plate 122. Then, an extended portion 122b is formed from the main body portion 122a of the light guide plate 122 through the curved portion 122c, and the pattern light emitting element group 111 of the main display portion 110 and the light emitting device 121 for the light guide plate of the surface light emitting portion 120 emit a single light. By mounting on the substrate 104, a compact configuration can be realized. However, since the curved portion 122c is formed on the light guide plate 122, the light propagation property may be suppressed.

  Specifically, as shown in FIG. 13, there is a situation in which the light that has entered the extension 122b of the light guide plate 122 from the light emitting element 121 for the light guide plate does not travel from the curved portion 122c to the main body 122a but travels back through the extension 122b. is assumed. In this case, for example, if the backward light leaks to the outside from the end face of the extension 122b on the light guide plate light emitting element 121 side, the light amount of the light guide plate light emitting element 121 is lost. To compensate for such light loss (light shortage), the duty ratio at the time of light emission may be increased. However, the load on the light guide plate light emitting element 121 itself and a control circuit such as an IC for controlling driving of the light guide plate is large. Therefore, durability (life) may be reduced due to heat generation or the like.

  The light-emitting element 121 for the light guide plate is disposed outside the symbol light-emitting element group 111, and the light guide plate 122 emits light in a planar manner so as to enclose the main light emission representing the symbol. In general, since a light emitting element has a strong directivity and sharp directivity characteristics, it has good straightness, but tends to have a small light spread angle θ. Therefore, in order to realize a light emission mode that encloses light emission indicating a pattern, the mounting pitch of the light emitting elements 121 for the light guide plate is decreased to increase the number, or the duty ratio at the time of light emission of each element 121 is increased. As a result, the load increases as described above, and the durability (life) may be reduced.

  The object of the present invention is to reduce the amount of light emitted from the light-emitting element for the light guide plate without increasing the load on the light-emitting element for the light guide plate or reducing the durability (lifetime), and to achieve a compact size. An object of the present invention is to provide a display device for a gaming machine that realizes a light-emitting display mode that is rich in variety and gameplay while realizing a configuration.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, a display device for gaming machines of the present invention attached to a gaming machine is
A group of symbol light-emitting elements for displaying a symbol consisting of numbers, letters, etc. in the display area by one or more individual symbol light-emitting elements provided for each segment and notifying the player in a predetermined arrangement direction A segment display section as a main display section arranged with a plurality of intervals ,
A main body that covers the plurality of symbol light emitting element groups of the segment display portion in a planar shape from the player side that is the display surface side, and the plurality of symbol light emitting element groups along the arrangement direction from the main body part through the curved portion A translucent light guide plate including an extension portion extending so as to surround both sides of the light guide plate, and an arrangement thereof for each of the symbol light emitting element groups in order to emit light from the end face side of the extension portion to cause surface light emission. A surface light emitting unit having a pair of light emitting elements for a light guide plate arranged in pairs to sandwich from both sides along the direction ;
A plurality of symbol light emitting element groups and a plurality of light guide plate light emitting element pairs located on both sides thereof, and a single light emitting substrate mounted on the display surface side along the arrangement direction ;
Light that has entered the light guide plate extension from the light guide plate light-emitting element on the light guide plate side end face of the light guide plate extension does not travel from the curved portion to the main body, but reverses the extension. loss reducing means for reducing the light loss caused by it is arranged,
The loss reducing means is a portion of the extension portion of the light guide plate on the light guide plate light emitting element side end surface that is not opposed to the light guide plate light emitting element, and is adjacent to the pattern light emitting element group in the arrangement direction. The light that is formed corresponding to the interval located between them and that travels backward through the extension is reflected and diffused by the loss reducing means and re-introduced into the extension .

In this case, specifically,
A display device for a gaming machine attached to a gaming machine,
A symbol light emitting element group is provided for displaying a symbol consisting of numbers, letters, etc., to each player by one or more individual symbol light emitting elements provided for each segment, and informing the player of each segment. A segment display section as a main display section arranged in a line in the arrangement direction of
A main body that covers the plurality of symbol light emitting element groups of the segment display portion in a planar shape from the player side that is the display surface side, and the plurality of symbol light emitting element groups along the arrangement direction from the main body part through the curved portion A translucent light guide plate including an extension portion extending so as to surround both sides of the light guide plate, and an arrangement thereof for each of the symbol light emitting element groups in order to emit light from the end face side of the extension portion to cause surface light emission. A surface light emitting unit having a plurality of pairs of light emitting elements for a light guide plate arranged in pairs to sandwich from both sides along the direction;
A plurality of symbol light emitting element groups and a plurality of light guide plate light emitting element pairs located on both sides thereof, and a single light emitting substrate mounted on the display surface side along the arrangement direction;
Light that has entered the light guide plate extension from the light guide plate light-emitting element on the light guide plate side end face of the light guide plate extension does not travel from the curved portion to the main body, but reverses the extension. It is possible to configure so that a loss reducing means for reducing the light amount loss caused by the above is disposed.

  As described above, the loss reducing means for reducing the light amount loss of the light emitting element for the light guide plate is disposed on the end face of the light emitting element for the light guide plate of the extension part of the light guide plate. It is possible to prevent an increase in the load applied to a control circuit such as an IC for driving and controlling the deterioration of the durability (life) due to heat generation.

  Specifically, the loss reducing means is configured such that the light guide plate light emitting element extends from the light guide plate light emitting element to the light guide plate light emitting element side end surface of the light guide plate extension portion on the light guide plate light emitting element side end surface. It is formed as a reflective layer to reduce the loss of light amount caused by the light entering the back part of the extension part without going from the curved part to the body part, and the light that goes back the extension part is reflected and diffused by the reflection layer. May be reintroduced into the extension. In this way, the reflective layer is formed in a portion of the extension portion of the light guide plate on the light guide plate light emitting element side end surface that is not opposed to the light guide plate light emitting element, that is, a portion separated from the optical axis of the light guide plate light emitting element. As a result, the light traveling backward through the extension is reflected by the reflective layer and reintroduced into the extension. Therefore, light leaking from the light guide plate light emitting element side end surface of the extension portion of the light guide plate can be reduced, so that the load on the light guide plate light emitting element or the like is increased or the durability (life) is reduced. Can be prevented.

  The reflective layer here is formed by painting with a white paint, sticking a white reflective seal, vacuum deposition of aluminum or the like, and white coating, which is a particularly simple method, is recommended.

  Further, the loss reducing means enters the extension portion of the light guide plate from the light emitting element for the light guide plate at a portion that is not opposed to the light emitting element for the light guide plate on the light emitting element side end surface of the extension portion of the light guide plate. It is formed as a concavo-convex part to reduce the amount of light loss caused by reversing the extension part without going from the curved part to the main body part, and the light going back through the extension part is reflected and diffused by the concavo-convex part and extended May be reintroduced to the department. As described above, the uneven portion is formed in a portion of the light guide plate light emitting element side end surface of the extension portion of the light guide plate that is not opposed to the light guide plate light emitting element, that is, a portion separated from the optical axis of the light guide plate light emitting element. As a result, the light traveling backward through the extension is reflected by the concavo-convex portion and reintroduced into the extension. Therefore, light leaking from the light guide plate light emitting element side end surface of the extension portion of the light guide plate can be reduced, so that the load on the light guide plate light emitting element or the like is increased or the durability (life) is reduced. Can be prevented.

  The uneven portions here are formed by knurled eyes or the like which are provided with notches (notches) such as a sawtooth shape (triangular prism shape) and a pyramid shape (quadrangular pyramid shape).

  On the other hand, the directivity of light entering the extension part of the light guide plate from the light emission element for the light guide plate is widened at the portion facing the light emission element for the light guide plate on the end surface of the light guide plate light emitting element side of the extension part of the light guide plate In some cases, undulations are formed. In this way, by forming the undulating portion in the portion of the light guide plate light emitting element side end surface of the extension portion of the light guide plate facing the light guide plate light emitting element, that is, the portion including the optical axis of the light guide plate light emitting element, The spread angle of light entering the extension portion of the light guide plate from the light emitting element for the light guide plate is increased. Therefore, in order to realize a light emission mode that envelops the light emission showing the design, the mounting pitch of the light emitting elements for the light guide plate is not reduced, the number is increased, and the duty ratio at the time of light emission of each element is not increased. Therefore, it is possible to prevent the load of the light emitting element for the light guide plate and the like from being increased, and the durability (life) from being reduced.

  Here, the undulations formed in the facing part are configured in the same form as the concavo-convex part formed in the non-facing part, and both are continuously arranged on the light guide element side end surface of the extension part of the light guide plate. It is desirable. By continuously arranging the undulating portion and the uneven portion in the same form, the cost required for these surface processing (knurling) is reduced. In addition, the depth and pitch of the undulations formed in the facing part are parameters such as the directivity characteristics (for each wavelength) of the light guide element for the light guide plate, the separation distance between the light guide element for the light guide plate and the light emitting element side end surface As determined.

  In addition, on the light guide plate light emitting element side end surface of the extension portion of the light guide plate, the directivity of light entering the extension portion of the light guide plate from the light guide plate light emitting element is widened at the portion facing the light guide plate light emitting element. In some cases, a curved concave portion is formed. In this way, by forming the curved concave portion in the portion facing the light guide plate light emitting element of the light guide plate light emitting element side end surface of the extension portion of the light guide plate, that is, the portion including the optical axis of the light guide plate light emitting element. The spread angle of light entering from the light emitting element for the light guide plate to the extension portion of the light guide plate is increased. Therefore, in order to realize a light emission mode that envelops the light emission showing the design, the mounting pitch of the light emitting elements for the light guide plate is not reduced, the number is increased, and the duty ratio at the time of light emission of each element is not increased. Therefore, it is possible to prevent the load of the light emitting element for the light guide plate and the like from being increased, and the durability (life) from being reduced.

  Here, it is desirable that the curved concave portion formed in the facing portion is formed in a semi-cylindrical surface shape or a hemispherical arc shape (arch shape). As a result, the light that enters the extended portion of the light guide plate from the light emitting element for the light guide plate is evenly spread and easily diffused. In addition, the depth and opening area of the curved concave portion formed in the facing part are also the directivity characteristics (for each wavelength) of the light-emitting element for the light guide plate, the separation distance between the light-emitting element for the light guide plate and the end face on the light-emitting element side of the light guide plate Is determined as a parameter.

Example 1
An embodiment of a display device for gaming machines to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a front view and a rear view of an embodiment of a display device for gaming machines according to the present invention, and FIG. 2 is a side sectional view thereof. As shown in FIGS. 1 and 2, a display device for gaming machines (hereinafter also simply referred to as a display device) 1 has a rectangular box shape as a whole. The display device 1 includes a resin-made opaque case 3 (for example, opaque), a segment display unit 10 (main display unit) and a surface light emitting unit 20 from the back side (rear side; opposite to the player). Are accommodated with their respective display surfaces (light emitting surfaces) facing the front side (front side; player side), and the rectangular light emitting substrate 4 (common substrate) and the back cover 5 cover the rear side of the case 3. ing.

  Among these, the segment display unit 10 can select and display a pattern (for example, 10 types of numbers from 0 to 9) made up of numbers, letters, etc., and a plurality of continuous lines in a predetermined direction (arrangement direction). It is configured to include display areas 10A to 10C (for example, three digits).

  Specifically, the segment display unit 10 is made of resin as a segment-constituting frame that divides each display area 10A to 10C into a plurality of segments (for example, seven pieces that are combined in a “8” shape). It has a single reflector 12 and a plurality of (for example, three sets) symbol light emitting element groups 11 arranged in the arrangement direction so as to coincide with the display areas 10A to 10C. Each segment LED (symbol light emitting element) constituting the symbol light emitting element group 11 is provided for each segment (7 × 3 sets = 21 in total), and each light emitting diode (for example, red single color LED) is provided. It consists of LEDs 13-33. Accordingly, the 21 hollow segments penetrating the reflector 12 in the front-rear direction are arranged with the optical axes of the light-emitting diodes LEDs 13 to 33 facing the player side (display surface side; front side), respectively. The side wall of the segment acts as a reflective surface.

  Further, the surface light emitting unit 20 is sandwiched from both sides along the arrangement direction for each light emitting element group 11 and a single light-transmitting (for example, transparent) light guide plate 22 made of resin such as acrylic, glass, or the like. And a plurality of (for example, six pairs) light-emitting plate pairs 21 arranged in pairs.

  Specifically, the light guide plate 22 connects the flat main body portion 22a, the extension portion 22b protruding from both sides in the arrangement direction (longitudinal direction) of the main body portion 22a, and the main body portion 22a and the extension portion 22b in an arc shape. And a curved portion 22c. The main body 22a covers the segment display unit 10, that is, the three sets of symbol light emitting element groups 11 and the single reflector 12 in a planar shape from the display surface side (player side; front side). The extension 22b extends rearward from the main body 22a so as to surround both sides of the symbol light emitting element group 11 along the arrangement direction. In addition, each of the light guide plate LEDs (light guide plate light emitting elements) constituting the light guide plate light emitting element pair 21 is four (4 × 3 sets) for each of the symbol light emitting element groups 11 (display areas 10A to 10C). A total of twelve (two pairs of light-emitting element pairs for the light guide plate 21) are provided, each of which is composed of light-emitting diodes (for example, RGB three-color full-color LEDs) LEDs 1-12. Here, R represents red, G represents green, and B represents blue.

  As shown in FIG. 1A, the light-emitting plate pair 21 for the light guide plate is arranged in parallel in the form of a pair so as to be sandwiched from both sides along the arrangement direction for each pattern light-emitting element group 11. A line connecting the optical axes of the light emitting element pair 21 (for example, the light emitting diode LED1 and the light emitting diode LED2) intersects (for example, orthogonal) with the arrangement direction. Further, as shown in FIG. 2, the extension 22b of the light guide plate 22 intersects (for example, orthogonally) with the main body 22a so as to approach the light emitting substrate 4 side, and the front end surface of the light guide plate light emitting element pair 21 ( It is very close to or in contact with the light emitting diodes LED1-12). Therefore, the optical axis of the light-emitting plate pair 21 (light-emitting diodes LED1 to 12) is substantially parallel to the optical axis of the symbol light-emitting element group 11 (light-emitting diodes LED13 to 33) in the extension 22b. And approximately orthogonal. On the other hand, the optical axis of the light-emitting plate pair 21 for the light guide plate intersects (for example, is orthogonal to) the optical axis of the symbol light-emitting element group 11 on the front side of the reflector 12 in the main body portion 22 a and is substantially parallel to the light-emitting substrate 4.

  For a plurality (6 pairs) of light guide plates arranged in parallel on both sides of a plurality (three sets) of symbol light emitting element groups 11 on the front side (display surface side) of a single rectangular light emitting substrate 4 The light emitting element pair 21 is mounted along the arrangement direction of a plurality (three digits) of display areas 10A to 10C. The mounting surface of the light-emitting substrate 4 (light-emitting element mounting surface for the light guide plate) is entirely painted white, and the reflection for reflecting the light traveling backward through the extension 22b of the light guide plate 22 and reintroducing it into the extension 22b. The layer 4A (loss reducing means) is formed.

  The operation of the display device 1 configured as described above will be described. When the individual light-emitting diodes LED 13 to 19, 20 to 26, and 27 to 33 that make up each of the symbol light emitting element groups 11 selectively emit light, a predetermined symbol is displayed as a segment in each of the display areas 10 </ b> A to 10 </ b> C. On the other hand, each light emitting diode LED1-12 which comprises each light emitting element pair 21 for light-guide plates light-emits, The light is guide | induced to the main-body part 22a through the extended part 22b of the light-guide plate 22, the curved part 22c, and a light-guide plate 22 emits light. As a result, the player was layered with the light emission mode of each symbol (each display area 10A to 10C) of the segment display unit 10 and the overall planar light emission mode of the light guide plate 22 (surface light emitting unit 20). The light emitting display form can be visually recognized.

  In this way, RGB three-color full color LEDs are adopted for the individual light emitting diodes LED1 to 12 constituting the light emitting element pair 21 for the light guide plate, and the light emitting mode of the surface light emitting unit 20 with each of the light emitting diodes LED1 to 12 as a unit. Is changing. Thereby, the surface emitting pattern can be finely controlled in units of one element, and the gradation effect of the display device 1 can be enhanced.

  Next, FIG. 3 is a perspective view of a main part, and FIG. 4 is a longitudinal side view thereof. On the light guide plate light emitting element side end surface of the extension portion 22b of the light guide plate 22, a portion 22b1 (non-opposing portion) that is not opposed to the light guide plate light emitting element 21 is painted white, and the extension portion 22b of the light guide plate 22 is reversed. The reflection layer 23 (loss reduction means) for reflecting the light to be reflected and reintroducing it into the extension 22b is formed. As shown in FIG. 4, even if the light that has entered the extension 22b of the light guide plate 22 from the light-emitting element 21 for the light guide plate does not travel from the curved portion 22c to the main body 22a, and moves backward through the extension 22b, the non-opposing portion 22b1 Since the light is reflected / diffused by the reflective layer 23 formed at the portion separated from the optical axis of the light-emitting element for the light guide plate and re-introduced into the extension portion 22b, the light amount loss from the light-emitting element side end face for the light guide plate Can be reduced. Therefore, it is possible to prevent the load applied to the light-guiding plate light-emitting element 21 itself and a control circuit such as an IC that controls driving of the light-emitting plate 21 from being increased or the durability (lifetime) from being reduced due to heat generation or the like.

(Modification 1-1)
FIG. 5 shows a modification of the first embodiment. On the light guide plate light emitting element side end face of the extension portion 22b of the light guide plate 22, a portion 22b2 (opposite portion) facing the light guide plate light emitting element 21 is extended from the light guide plate light emitting element 21 to the extension portion 22b of the light guide plate 22. A semi-cylindrical arc portion 25 (curved concave portion) is formed for widening the directivity of incoming light. As shown in FIG. 5B, the arc portion 25 formed in the facing portion 22b2 (that is, the portion including the optical axis of the light guide plate light emitting element 21) extends the light guide plate 22 from the light guide plate light emitting element 21. The spread angle θ of light entering 22b is increased. Therefore, in order to realize a light emission mode that encloses light emission indicating a design, the mounting pitch of the light guide elements 21 for the light guide plate is decreased to increase the number, or the duty ratio at the time of light emission of each element 21 is increased. Therefore, it is possible to prevent an increase in the load on the light-emitting element 21 for the light guide plate itself and a control circuit such as an IC for driving and controlling the light-emitting element 21 and a decrease in durability (life) due to heat generation.

(Example 2)
FIG. 6 is a perspective view of a main part according to another embodiment, and FIG. 7 is a longitudinal side view thereof. On the end surface of the extension portion 22b of the light guide plate 22 on the light emitting element side of the light guide plate, light that travels backward through the extension portion 22b of the light guide plate 22 is applied to a portion 22b1 (non-opposing portion) that does not face the light emitting element 21 for light guide plate. A saw-toothed (triangular prism-shaped) first knurled portion 24A (uneven portion; loss reducing means) is formed for reflection and re-introduction into the extended portion 22b. As shown in FIG. 7, even if the light that has entered the extension portion 22b of the light guide plate 22 from the light-emitting element 21 for the light guide plate does not travel from the curved portion 22c to the main body portion 22a, the extension portion 22b travels backward. That is, the light is reflected and diffused by the first knurled portion 24A formed at the portion separated from the optical axis of the light emitting element for the light guide plate, and is re-introduced into the extension portion 22b. Light loss can be reduced. Therefore, it is possible to prevent the load applied to the light-guiding plate light-emitting element 21 itself and a control circuit such as an IC that controls driving of the light-emitting plate 21 from being increased or the durability (lifetime) from being reduced due to heat generation or the like.

  Further, on the end surface of the light guide plate light emitting element side of the extension portion 22b of the light guide plate 22, an extension portion of the light guide plate 22 from the light guide plate light emitting element 21 is provided at a portion 22b2 (opposite portion) facing the light guide plate light emitting element 21. A sawtooth-shaped (triangular prism-shaped) second knurled portion 24B (undulation) is formed to widen the directivity of light entering 22b. As shown in FIG. 7, the second knurled portion 24B formed in the facing portion 22b2 (that is, the portion including the optical axis of the light guide plate light emitting element 21) extends from the light guide plate light emitting element 21 to the extension portion 22b of the light guide plate 22. The spread angle θ of the light that enters is increased. Therefore, in order to realize a light emission mode that encloses light emission indicating a design, the mounting pitch of the light guide elements 21 for the light guide plate is decreased to increase the number, or the duty ratio at the time of light emission of each element 21 is increased. Therefore, it is possible to prevent an increase in the load on the light-emitting element 21 for the light guide plate itself and a control circuit such as an IC for driving and controlling the light-emitting element 21 and a decrease in durability (life) due to heat generation. Since the second knurled portion 24B is continuously arranged in the same form as the first knurled portion 24A, the cost required for knurling is reduced.

(Modification 2-1)
FIG. 8 shows a modification of the second embodiment. On the light guide plate light emitting element side end face of the extension portion 22b of the light guide plate 22, a portion 22b2 (opposite portion) facing the light guide plate light emitting element 21 is extended from the light guide plate light emitting element 21 to the extension portion 22b of the light guide plate 22. A semi-cylindrical arc portion 25 (curved concave portion) is formed for widening the directivity of incoming light. As shown in FIG. 8B, an extension portion of the light guide plate 22 from the light emitting element 21 for the light guide plate is formed by the arc portion 25 formed in the facing portion 22 b 2 (that is, the portion including the optical axis of the light emitting element 21 for the light guide plate). The spread angle θ of light entering 22b is increased. Therefore, in order to realize a light emission mode that encloses light emission indicating a design, the mounting pitch of the light guide elements 21 for the light guide plate is decreased to increase the number, or the duty ratio at the time of light emission of each element 21 is increased. Therefore, it is possible to prevent an increase in the load on the light-emitting element 21 for the light guide plate itself and a control circuit such as an IC for driving and controlling the light-emitting element 21 and a decrease in durability (life) due to heat generation.

(Modification 2-2)
FIG. 9 shows another modification of the second embodiment. The first knurled portion 24A (uneven portion; loss reduction) formed in a portion 22b1 (non-facing portion) that is not opposed to the light-emitting plate light-emitting element 21 on the light-emitting plate-side light emitting element side end surface of the extension 22b of the light guide plate 22 Means) is coated in white, and constitutes a reflection layer 23 (loss reduction means) for reflecting the light traveling backward through the extension 22b of the light guide plate 22 and reintroducing it into the extension 22b. As shown in FIG. 9B, even if the light that has entered the extension 22b of the light guide plate 22 from the light emitting element 21 for the light guide plate does not travel from the curved portion 22c to the main body 22a, The light guide plate is reflected and diffused by the first knurled portion 24A and the reflective layer 23 formed in the facing portion 22b1 (that is, a portion separated from the optical axis of the light emitting element for the light guide plate) and re-introduced into the extension portion 22b. Light loss from the light emitting element side end face can be reduced. Therefore, it is possible to prevent the load applied to the light-guiding plate light-emitting element 21 itself and a control circuit such as an IC that controls driving of the light-emitting plate 21 from being increased or the durability (lifetime) from being reduced due to heat generation or the like.

(Modification 2-3)
FIG. 10 shows still another modification of the second embodiment, and FIG. 9 (modification 2-2) is modified as follows. That is, on the end surface of the light guide plate light emitting element side of the extension portion 22b of the light guide plate 22, the extension portion of the light guide plate 22 from the light guide plate light emitting element 21 is located at a portion 22b2 (opposite portion) facing the light guide plate light emitting element 21. A semi-cylindrical arc portion 25 (curved concave portion) for widening the directivity of light entering 22b is formed. As shown in FIG. 10B, the arc portion 25 formed in the facing portion 22b2 (that is, the portion including the optical axis of the light guide plate light emitting element 21) extends the light guide plate 22 from the light guide plate light emitting element 21. The spread angle θ of light entering 22b is increased. Therefore, in order to realize a light emission mode that encloses light emission indicating a design, the mounting pitch of the light guide elements 21 for the light guide plate is decreased to increase the number, or the duty ratio at the time of light emission of each element 21 is increased. Therefore, it is possible to prevent an increase in the load on the light-emitting element 21 for the light guide plate itself and a control circuit such as an IC for driving and controlling the light-emitting element 21 and a decrease in durability (life) due to heat generation.

(Reference example)
FIG. 11 shows a reference example that forms the basis of FIG. 5 (Modification 1-1), FIG. 8 (Modification 2-1), and FIG. 10 (Modification 2-3). That is, on the end surface of the light guide plate light emitting element side of the extension portion 22b of the light guide plate 22, the extension portion of the light guide plate 22 from the light guide plate light emitting element 21 is located at a portion 22b2 (opposite portion) facing the light guide plate light emitting element 21. A semi-cylindrical arc portion 25 (curved concave portion) for widening the directivity of light entering 22b is formed. As shown in FIG. 11 (b), the light-emitting element 21 for the light guide plate is refracted when incident on the arc portion 25 formed in the facing part 22b2 (that is, the part including the optical axis of the light-emitting element 21 for the light guide plate). The spread angle θ of light entering the extended portion 22b of the light guide plate 22 from the light increases (see FIG. 13). The expansion of the spread angle θ due to refraction at the time of incidence of light occurs also in the second knurl portion 24B of FIG. 7 (Example 2) and FIG. 9 (Modification 2-2). Details are omitted.

  In the above-described embodiments, modifications, and reference examples, parts having common functions are denoted by the same reference numerals and description thereof is omitted. In addition, these Examples and modifications can be implemented in combination as appropriate. Further, the main display unit 10 may not be a 7-segment system. Furthermore, the light-emitting element 21 for the light guide plate may be implemented without being a pair, and may be one.

The front view and back view of one Example of the display apparatus for game machines which concern on this invention. AA sectional drawing of Fig.1 (a). The perspective view of the principal part. FIG. 4 is a longitudinal side view of FIG. 3. The perspective view and longitudinal direction side view of the principal part which show a modification. The perspective view of the principal part which shows another Example. FIG. 7 is a longitudinal side view of FIG. 6. The perspective view and longitudinal direction side view of the principal part which show a modification. The perspective view and longitudinal direction side view of the principal part which show another modification. The perspective view and longitudinal direction side view of the principal part which show another modification. The perspective view and longitudinal direction side view of the principal part which show a reference example. The perspective view of the principal part which shows a prior art example. The longitudinal direction side view of FIG.

Explanation of symbols

1 display device (display device for gaming machines)
4 Light emitting substrate (common substrate)
10 segment display (main display)
10A-10C Display area 11 Pattern light emitting element group LED13-33 Segment LED (design light emitting element)
20 surface light emission part 21 light emitting element pair for light guide plates LED1-12 light guide plate LED (light emitting element for light guide plates)
22 light guide plate 22a body part 22b extension part 22b1 non-opposing part 22b2 opposing part 22c curved part 23 reflective layer (loss reduction means)
24A First knurled portion (uneven portion; loss reduction means)
24B Second knurled part (undulation)
25 Arc part (curved concave part)

Claims (5)

A display device for a gaming machine attached to a gaming machine,
A group of symbol light-emitting elements for displaying a symbol consisting of numbers, letters, etc. in the display area by one or more individual symbol light-emitting elements provided for each segment and notifying the player in a predetermined arrangement direction A segment display section as a main display section arranged with a plurality of intervals ,
A main body that covers the plurality of symbol light emitting element groups of the segment display portion in a planar shape from the player side that is the display surface side, and the plurality of symbol light emitting element groups along the arrangement direction from the main body part through the curved portion A translucent light guide plate including an extension portion extending so as to surround both sides of the light guide plate, and an arrangement thereof for each of the symbol light emitting element groups in order to emit light from the end face side of the extension portion to cause surface light emission. A surface light emitting unit having a pair of light emitting elements for a light guide plate arranged in pairs to sandwich from both sides along the direction ;
A plurality of symbol light emitting element groups and a plurality of light guide plate light emitting element pairs located on both sides thereof, and a single light emitting substrate mounted on the display surface side along the arrangement direction ;
Light that has entered the light guide plate extension from the light guide plate light-emitting element on the light guide plate side end face of the light guide plate extension does not travel from the curved portion to the main body, but reverses the extension. loss reducing means for reducing the light loss caused by it is arranged,
The loss reducing means is a portion of the extension portion of the light guide plate on the light guide plate light emitting element side end surface that is not opposed to the light guide plate light emitting element, and is adjacent to the pattern light emitting element group in the arrangement direction. A display device for a gaming machine, characterized in that the light that is formed corresponding to the interval located between them and travels backward through the extension is reflected and diffused by the loss reducing means and re-introduced into the extension . The loss mitigation means for mitigating the amount of light loss caused by light entering the extension of the light guide plate from the light guide plate for the light emitting element to reverse the extension thereof without proceeding to the main part from the curved portion The display device for a gaming machine according to claim 1, wherein light that is formed as a reflective layer and travels backward through the extension is reflected and diffused by the reflection layer and re-introduced into the extension. The loss mitigation means for mitigating the amount of light loss caused by light entering the extension of the light guide plate from the light guide plate for the light emitting element to reverse the extension thereof without proceeding to the main part from the curved portion The display device for a gaming machine according to claim 1 or 2, wherein the light that is formed as a concavo-convex portion and travels backward through the extension portion is reflected and diffused by the concavo-convex portion and is reintroduced into the extension portion.   On the end face of the light guide plate light emitting element side of the extension portion of the light guide plate, the directivity of light entering the extension portion of the light guide plate from the light guide plate light emitting element is widened in a portion facing the light guide plate light emitting element. The display device for gaming machines according to any one of claims 1 to 3, wherein a undulation portion is formed to make the undulation. In the light guide plate for the light-emitting element side end face of the extension portion of the light guide plate, the portion facing the light guide plate for light-wide directivity of light entering from said light guide plate for the light-emitting element in the extension of the light guide plate The display device for gaming machines according to any one of claims 1 to 4, wherein a curved concave portion is formed to make it.

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