WO2016103865A1 - Light guide plate, display device, and game machine - Google Patents

Light guide plate, display device, and game machine Download PDF

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Publication number
WO2016103865A1
WO2016103865A1 PCT/JP2015/079229 JP2015079229W WO2016103865A1 WO 2016103865 A1 WO2016103865 A1 WO 2016103865A1 JP 2015079229 W JP2015079229 W JP 2015079229W WO 2016103865 A1 WO2016103865 A1 WO 2016103865A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
prisms
light
light source
Prior art date
Application number
PCT/JP2015/079229
Other languages
French (fr)
Japanese (ja)
Inventor
純也 藤田
吉正 大角
佳彦 ▲高▼木
勇司 広瀬
Original Assignee
オムロン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015139033A external-priority patent/JP6561644B2/en
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Priority to US15/529,273 priority Critical patent/US10591659B2/en
Publication of WO2016103865A1 publication Critical patent/WO2016103865A1/en

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F7/00—Indoor games using small moving playing bodies, e.g. balls, discs or blocks
    • A63F7/02—Indoor games using small moving playing bodies, e.g. balls, discs or blocks using falling playing bodies or playing bodies running on an inclined surface, e.g. pinball games
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs

Definitions

  • the present invention relates to a light guide plate for displaying a pattern, a display device, and a gaming machine having such a display device.
  • the back surface of the light guide plate included in the illumination device disclosed in Patent Document 1 has a plurality of optical path changing elements that change the optical path of incident light and emit light from the exit surface.
  • Each of the plurality of optical path changing elements reflects incident light so as to have directivity in a predetermined direction.
  • the plurality of optical path changing elements include a direction in which light reflected from at least one type of optical path changing element has directivity, and a direction in which light reflected from the other type of optical path changing element has directivity.
  • a plurality of types of optical path changing elements including a direction different from the direction are included.
  • the illumination device disclosed in Patent Document 1 uses a light guide plate in which a plurality of types of optical path changing elements as described above are used, thereby changing the light intensity distribution depending on the viewing direction.
  • an object of the present invention is to provide a light guide plate that can reduce a luminance difference depending on a direction in which a pattern that looks shining is viewed.
  • a light guide plate formed in a plate shape transparent to visible light is provided.
  • the light guide plate is arranged along a predetermined pattern on the incident surface formed on the side wall of the light guide plate facing the light source that emits visible light and on one surface of the light guide plate, and is emitted from the light source.
  • a plurality of prisms having a reflecting surface that reflects visible light that has entered the light guide plate from the incident surface toward the other surface of the light guide plate.
  • the plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions.
  • Each of the prisms is arranged.
  • each of the plurality of prisms is within a predetermined angle range including a direction in which the reflecting surfaces of the two prisms closer than a predetermined pitch face the light source in a plane parallel to one surface of the light guide plate. It is preferable that they are arranged so as to face different directions.
  • the predetermined pitch is set to be less than the minimum value of the length at which the observer can distinguish two prisms out of the plurality of prisms.
  • the light guide plate further includes a metal layer having a pattern shape provided at a predetermined pattern position on the surface on which each prism is formed.
  • a light guide plate formed in a plate shape transparent to visible light is provided.
  • the light guide plate is arranged along a predetermined pattern on the incident surface formed on the side wall of the light guide plate facing the light source that emits visible light and on one surface of the light guide plate, and is emitted from the light source.
  • a plurality of prisms having a reflecting surface that reflects visible light that has entered the light guide plate from the incident surface toward the other surface of the light guide plate.
  • Each of the plurality of prisms has a reflecting surface facing the same direction for each of the plurality of partial areas obtained by dividing the predetermined pattern, and the reflecting surface between two adjacent partial areas of the plurality of partial areas. Are arranged in different directions.
  • the light guide plate further includes a metal layer having a pattern shape provided at a predetermined pattern position on the surface on which each prism is formed.
  • a display device includes a light source that emits visible light, a light guide plate that is formed in a plate shape transparent to visible light, and a control unit that controls turning on and off of the light source.
  • the light guide plate is arranged along a predetermined pattern on an incident surface facing the light source, formed on one side of the side wall of the light guide plate, and on one surface of the light guide plate, and emits from the light source and enters the light guide plate from the incident surface.
  • a plurality of prisms having a reflection surface that reflects the visible light incident on the light guide toward the other surface of the light guide plate.
  • the plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions.
  • Each of the prisms is arranged.
  • a gaming machine has a gaming machine main body and a display device provided on a surface of the gaming machine main body facing the player, the display device being a light source that emits visible light, and transparent to visible light.
  • a light guide plate formed in a flat plate shape and a control unit that controls turning on and off of the light source.
  • the light guide plate is arranged along a predetermined pattern on the incident surface facing the light source, formed on one side of the side wall of the light guide plate, and on one surface of the light guide plate.
  • a plurality of prisms having a reflective surface that reflects visible light incident therein toward the other surface of the light guide plate provided on the side facing the player.
  • the plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions.
  • Each of the prisms is arranged.
  • the light guide plate according to the present invention has an effect of reducing the luminance difference depending on the viewing direction of the pattern that looks shining.
  • FIG. 1 is a schematic configuration diagram of a display device according to an embodiment of the present invention.
  • FIG. 2 is a schematic front view of a light guide plate included in the display device.
  • FIG. 3 is a schematic side cross-sectional view of the light guide plate indicated by the arrow AA ′ in FIG. 2.
  • FIG. 4 is an enlarged plan view of a part of the pattern showing the arrangement of the prisms.
  • FIG. 5 is a diagram illustrating a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface of each prism is the same.
  • FIG. 6 is a diagram showing a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface of the prism is varied within an angle range of ⁇ 10 ° in units of 5 ° with the direction facing the light source as the center. It is.
  • FIG. 7 is an enlarged plan view of a part of the pattern showing the arrangement of the prisms according to the second embodiment.
  • FIG. 8 is a schematic perspective view of the ball game machine having the display device according to each of the above-described embodiments or modifications as seen from the player side.
  • This display device has a light guide plate in which a material transparent to visible light is formed in a plate shape, and one surface of the light guide plate is formed as an exit surface facing an observer. On the other surface of the light guide plate facing the exit surface, there are a plurality of prisms that reflect the visible light emitted from the light source and incident into the light guide plate from the entrance surface formed on the side wall of the light guide plate toward the exit surface. It is formed. Each of the plurality of prisms is arranged in accordance with the shape of the pattern displayed by the display device.
  • the prisms are arranged so that the directions of the reflecting surfaces of the prisms separated by a predetermined pitch are the same, and the directions of the reflecting surfaces of the prisms closer than the predetermined pitch are different within a predetermined angular range. Reduce the brightness difference depending on the viewing direction.
  • the side facing the observer is the front and the opposite side is the back.
  • FIG. 1 is a schematic configuration diagram of a display device according to an embodiment of the present invention.
  • the display device 1 includes a light guide plate 2, a light source 3, and a control unit 4.
  • the light guide plate 2 is a member formed in a plate shape transparent to visible light emitted from the light source 3.
  • the light guide plate 2 is formed by molding a resin that is transparent to visible light, such as polymethyl methacrylate (PMMA), polycarbonate, or cycloolefin polymer.
  • PMMA polymethyl methacrylate
  • the light guide plate 2 propagates the light from the light source 3 while the light source 3 is lit, and forms a predetermined pattern 22 corresponding to the light source 3 formed on the back side. By reflecting the light toward the observer located on the front side by the plurality of arranged prisms, the observer can visually recognize the light emission pattern 22. Details of the light guide plate 2 will be described later.
  • the light source 3 has at least one light emitting element that emits visible light, and is disposed so that the light emitting surface of the light emitting element faces the incident surface 2 a that is one of the side walls of the light guide plate 2.
  • the light source 3 is turned on or off according to a control signal from the control unit 4. While the control unit 4 lights the light source 3, the light emitted from the light source 3 enters the light guide plate 2 through the incident surface 2 a and is guided after propagating through the light guide plate 2 while traveling straight or totally.
  • the light is reflected by a plurality of prisms formed on the diffusing surface 2b on the back side of the optical plate 2 and is emitted from the emitting surface 2c on the front side.
  • the light emitting element which the light source 3 has is a light emitting diode, an incandescent lamp, or a fluorescent lamp, for example.
  • the control unit 4 includes, for example, a processor, a memory circuit, and a drive circuit for the light source 3. And the control part 4 controls lighting and light extinction of the light source 3 according to the control signal from a high-order control apparatus (not shown). In order to make the pattern 22 visible to an observer located on the front side of the light guide plate 2, the control unit 4 turns on the light source 3 while making the pattern 22 invisible to the observer. The light source 3 is turned off.
  • FIG. 2 is a schematic front view of the light guide plate 2.
  • 3 is a schematic side sectional view of the light guide plate 2 taken along the line indicated by the arrow AA ′ in FIG.
  • an incident surface 2 a facing the light source 3 is formed on one surface of the side wall of the light guide plate 2.
  • Light from the light source 3 enters the light guide plate 2 from the incident surface 2a.
  • the light propagating through the light guide plate 2 while being totally reflected between the diffusion surface 2b and the exit surface 2c or traveling straight is formed on the diffusion surface 2b located on the back side of the light guide plate 2.
  • the light After being totally reflected by any of the prisms 21, the light is emitted from an emission surface 2 c that is located on the front side of the light guide plate 2 and faces the diffusion surface 2 b.
  • the plurality of prisms 21 are arranged along the pattern 22 so as to form the pattern 22. Therefore, the observer can observe the pattern 22 that appears to emit light on the surface of the light guide plate 2 while the light source 3 is lit. 2 and 3, it should be noted that the size of the prism 21 and the thickness of the light guide plate 2 are exaggerated in order to improve the visibility of the drawings.
  • Each of the plurality of prisms 21 is formed, for example, as a substantially triangular groove having a predetermined length on the diffusion surface 2b.
  • Each of the plurality of prisms 21 has a reflecting surface 21a that forms a predetermined angle with respect to the diffusing surface 2b.
  • the predetermined angle is set so that the light from the light source 3 incident on the light guide plate 2 is totally reflected and directed to the emission surface 2c, for example, 40 ° to 50 ° with respect to the diffusion surface 2b.
  • the predetermined length is set to such a length that the prism 21 cannot be visually recognized by the observer's eyes, for example, about several ⁇ m to several tens of ⁇ m.
  • FIG. 4 is an enlarged plan view of a part of the pattern 22 showing the arrangement of the prisms 21.
  • Each prism 21 is arranged so that the reflecting surface 21a faces in various directions.
  • the prisms 21 are arranged so that the two prisms 21 adjacent to each other have an interval smaller than a predetermined pitch. Then, the reflecting surfaces 21a of the two prisms 21 that are separated by a predetermined pitch face the same direction, and the reflecting surfaces 21a of the two prisms 21 that are closer than the predetermined pitch center on a specific direction.
  • the prisms 21 are arranged so as to face different directions within a predetermined angle range along a plane parallel to the.
  • the specific direction is, for example, the direction in which the reflection surface 21a faces the light source 3, and the predetermined angle range allows light from the light source 3 to be reflected by the reflection surface 21a and emitted from the emission surface 2c.
  • a wide angle range for example, ⁇ 10 °.
  • each prism is arranged so that the angle difference of the reflecting surface 21a between two prisms 21 adjacent to each other is, for example, 4 ° to 6 °.
  • the pitch between two prisms (the prism 21-1 and the prism 21-2 in FIG. 4) having the same direction of the reflecting surface 21a is less than the minimum length that can be identified by the observer's eyes. Is preferred.
  • the reflecting surface 21a is the same. It is preferable that the pitch between the two prisms 21 in the direction is 0.17 mm or less. However, in this embodiment, while the light source 3 is lit, each prism 21 appears to emit light from the observer, so the direction of the reflecting surface 21a is longer than the length corresponding to the minimum value of the viewing angle that can be identified by the observer. Even if the actual pitch between two prisms 21 having the same value is a little wider, each prism 21 is difficult to be identified.
  • the prisms 21 may be arranged so that the pitch between the two prisms 21 having the same orientation of the reflecting surface 21a is, for example, a length corresponding to an angle of 0.1 ° from the viewpoint of the observer. .
  • the pitch is 1 mm or less.
  • each of the plurality of prisms 21 the direction in which the light from the light source 3 is reflected by the prisms 21 is different. Therefore, even if the direction in which the pattern 22 is viewed is different, the brightness of the pattern 22 does not change so much. In addition, since the observer's eyes cannot detect luminance unevenness due to the difference in direction of the reflecting surface 21a of each prism 21, it is possible to show the observer as if the entire pattern 22 has uniform luminance.
  • FIG. 5 is a diagram showing a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface 21a of each prism 21 is the same.
  • the horizontal axis represents an angle in a plane that passes through the normal line of the exit surface 2c and is orthogonal to the entrance surface 2a.
  • the angle 0 ° corresponds to the normal direction of the emission surface 2c.
  • the vertical axis represents the illuminance at the assumed observer position.
  • a graph 500 represents the relationship between the angle and the illuminance.
  • the illuminance is halved at about ⁇ 2.5 ° with respect to the illuminance in the normal direction of the emission surface 2c. This indicates that the pattern 22 appears bright only from an angle close to the normal direction.
  • the direction of the reflecting surface 21a of the prism 21 varies within an angular range of ⁇ 10 ° in units of 5 ° along a plane parallel to the diffusing surface 2b with the direction facing the light source 3 as the center. It is a figure showing the simulation result of the illuminance distribution for every angle when letting.
  • the horizontal axis represents an angle in a plane that passes through the normal line of the exit surface 2c and is orthogonal to the entrance surface 2a.
  • the angle 0 ° corresponds to the normal direction of the emission surface 2c.
  • the vertical axis represents the illuminance at the assumed observer position.
  • a graph 600 represents the relationship between the angle and the illuminance.
  • the illuminance within a range of ⁇ 12.5 ° from the normal direction of the emission surface 2c is half or more of the illuminance in the normal direction. From this, it can be seen that the angular range in which the pattern 22 appears bright is greatly expanded compared to when the direction of the reflecting surface 21a is the same.
  • the plurality of prisms forming the pattern displayed on the light guide plate are such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and It arrange
  • the display device not only reflects light from the light source in a specific direction but also in the surrounding direction, so that variations in luminance depending on the direction in which the pattern is viewed can be reduced.
  • this display device has a reflecting surface of a prism arranged in each partial area of the pattern in order to change the direction in which the pattern appears bright in each partial area. Change the direction of.
  • the first embodiment and the second embodiment differ only in the arrangement of prisms that form a pattern. Therefore, the arrangement of the prism will be described below.
  • For other parts of the display device according to the second embodiment refer to the description of the corresponding part of the display device according to the first embodiment.
  • FIG. 7 is an enlarged plan view of a part of the pattern 22 showing the arrangement of the prisms 21 according to the second embodiment.
  • the reflecting surface 21a of each prism 21 in the partial area is directed in the same direction, while the reflecting surface of the prism 21 is between two adjacent partial areas.
  • Each prism 21 is arranged so that the direction of 21a is different.
  • each prism 21 included in the partial region 23-1 is arranged so that the reflection surface 21 a faces the light source 3.
  • each prism 21 included in the partial region 23-2 adjacent to the partial region 23-1 has a reflection surface 21a of 10 ° with the normal direction of the emission surface 2c as the rotation axis from the direction facing the light source 3. It is arranged to tilt. Therefore, in the partial region 23-2, the light incident from the light source 3 into the light guide plate 2 is caused by the prisms 21 in the partial region 23-2 by an angle corresponding to the inclination of the reflecting surface 21a from the directly facing direction. The direction is shifted from the normal direction of the emission surface 2c. As a result, when the observer views the light guide plate 2 from the front side of the exit surface 2c, the partial area 23-1 of the pattern 22 looks relatively bright, but the partial area 23-2 of the pattern 22 is compared. Looks dark.
  • each partial region is preferably set to a size in which the brightness is substantially the same in the pattern 22 and includes a plurality of prisms 21. Moreover, the size may differ for every partial area, or the size of each partial area may be the same. In addition, the direction of the reflecting surface 21a of the prism 21 for each partial region may be any of two preset directions, or may be any of three or more preset directions. Good.
  • the display device can generate a brightness distribution in the pattern by changing the direction of the reflecting surface of each prism in units of partial areas. Therefore, in this modification, it is not necessary to reduce the size of the prism in the partial region where the brightness is relatively low. Therefore, it becomes possible to prevent the processing of the prism in the partial area having relatively low brightness from becoming difficult. Further, in this embodiment, since it is not necessary to reduce the arrangement density of the prisms in the relatively dark partial area, flickering due to a luminance difference between the part having the prism and the part having no prism is prevented.
  • the directions of the reflecting surfaces of the two prisms are different from each other, they are in a plane parallel to the diffusing surface 2b, that is, the diffusing surface 2b (or the emitting surface 2c)
  • the angle formed by the reflecting surface 21a with respect to the diffusing surface 2b may be varied. Also in this case, if the angle formed by the reflecting surface 21a with respect to the diffusing surface 2b is changed, the angle of the light emitted from the emitting surface 2c is changed, so that the same effect as the display device according to each of the above embodiments or modifications is obtained. can get.
  • the metal layer may be provided only at a position corresponding to a pattern formed by a plurality of prisms on the diffusing surface 2b of the light guide plate 2.
  • a metal layer is formed by performing sputtering, vapor deposition, or plating after masking portions other than the pattern. Is done.
  • the metal layer is a thin film having a thickness of about 0.001 to 10 ⁇ m, for example.
  • the metal seal formed in the shape of the pattern is affixed to the position of the pattern on the diffusion surface 2b.
  • a layer is formed.
  • the metal layer has a thickness of 10 ⁇ m or more, for example.
  • the display device has a metallic texture for an observer who views the light guide plate 2 from the emission surface 2c side even when the light source 3 is turned off.
  • a pattern can be displayed.
  • the display device turns on the light source 3 for an observer who views the light guide plate 2 from the emission surface 2c side, so that the color corresponds to the color of the metal layer and the emission color from the light source 3.
  • a pattern that appears to emit light while having a metallic texture can be displayed.
  • FIG. 8 is a schematic perspective view of the ball game machine having the display device according to each of the above-described embodiments or modifications as seen from the player side.
  • the ball game machine 100 is provided in a large area from the top to the center, and includes a game board 101 that is a main body of the game machine, and a ball receiving part that is disposed below the game board 101.
  • an operation unit 103 having a handle, a liquid crystal display 104 provided in the approximate center of the game board 101, and a display device 105 disposed on the front surface of the liquid crystal display 104.
  • the ball game machine 100 has an accessory 106 arranged below the game board 101 or around the display device 105 on the front surface of the game board 101 in order to produce a game.
  • a rail 107 is disposed on the side of the game board 101.
  • a number of obstacle nails (not shown) and at least one winning device 108 are provided on the game board 101.
  • the operation unit 103 launches a game ball with a predetermined force from a launching device (not shown) according to the turning amount of the handle by the player's operation.
  • the launched game ball moves upward along the rail 107 and falls between a number of obstacle nails.
  • a main control circuit (not shown) provided on the back of the gaming board 101 causes the winning device 108 containing the game balls to enter.
  • a predetermined number of game balls corresponding to the above are paid out to the ball receiving portion 102 via a ball payout device (not shown).
  • the main control circuit drives the liquid crystal display 104 and the display device 105 via an effect CPU (not shown) provided on the back of the game board 101.
  • the display device 105 is an example of a display device according to each of the above-described embodiments or modifications, and is attached to the game board 101 so that the exit surface of the light guide plate faces the player. Then, the control unit of the display device 105 turns on the light source according to the control signal from the effect CPU according to the game state, and the player displays a predetermined pattern together with the video displayed on the liquid crystal display 104. Make it visible. Alternatively, the control unit may turn off the light source so that the player can observe only the video displayed on the liquid crystal display 104 via the light guide plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Provided is a light guide plate comprising a plurality of prisms 21 that are formed in the shape of a plate which is transparent with respect to visible light, that are provided to one surface (a diffusing surface 2b) of the light guide plate, that are arranged along a predetermined pattern 22, and that comprise a reflective surface 21a for reflecting visible light toward the other surface (an emission surface 2c) of the light guide plate, said visible light being emitted from a light source 3 and entering the light guide plate from an entry surface 2a. Among the plurality of prisms 21, the reflective surfaces 21a of two prisms separated by a predetermined pitch are oriented in the same direction, and each of the plurality of prisms 21 is arranged so that the reflective surfaces 21a of two prisms in closer proximity than the predetermined pitch are oriented in differing directions.

Description

導光板、表示装置及び遊技機Light guide plate, display device and game machine
　本発明は、パターンを表示する導光板、表示装置、及び、そのような表示装置を有する遊技機に関する。 The present invention relates to a light guide plate for displaying a pattern, a display device, and a gaming machine having such a display device.
　従来より、板状に形成された光透過性を有する導光板を有し、光源からその導光板へ入射した光の向きを、導光板に形成された複数のプリズムによって変えることで広い範囲を照明できる照明装置が提案されている（例えば、特許文献１を参照）。 Conventionally, it has a light-transmitting light guide plate formed in a plate shape, and illuminates a wide range by changing the direction of light incident on the light guide plate from the light source by a plurality of prisms formed on the light guide plate An illumination device that can be used has been proposed (see, for example, Patent Document 1).
　例えば、特許文献１に開示された照明装置が有する導光板の裏面には、入射した光の光路を変更して出射面から光を出射させる複数の光路変更素子を有する。複数の光路変更素子のそれぞれは、入射光を所定の方向に指向性を有するように反射させる。そして複数の光路変更素子には、少なくとも何れか一方の種類の光路変更素子から反射される光が指向性を有する方向に、他方の種類の光路変更素子から反射される光が指向性を有するどの方向とも異なる方向が含まれる、複数種類の光路変更素子が含まれる。 For example, the back surface of the light guide plate included in the illumination device disclosed in Patent Document 1 has a plurality of optical path changing elements that change the optical path of incident light and emit light from the exit surface. Each of the plurality of optical path changing elements reflects incident light so as to have directivity in a predetermined direction. The plurality of optical path changing elements include a direction in which light reflected from at least one type of optical path changing element has directivity, and a direction in which light reflected from the other type of optical path changing element has directivity. A plurality of types of optical path changing elements including a direction different from the direction are included.
特開２０１４－９６３２０号公報JP 2014-96320 A
　特許文献１に開示された照明装置は、上記のような複数の種類の光路変更素子が形成された導光板を用いることで、見る方向によって光の強度分布を変化させている。 The illumination device disclosed in Patent Document 1 uses a light guide plate in which a plurality of types of optical path changing elements as described above are used, thereby changing the light intensity distribution depending on the viewing direction.
　一方、用途によっては、様々な方向から見ても、あまり輝度が変わらずに、特定のパターンが光って見えるような光の装飾が求められることがある。 On the other hand, depending on the application, there is a need for a light decoration that allows a specific pattern to appear shining without much change in luminance even when viewed from various directions.
　そこで、本発明は、光って見えるパターンの見る方向による輝度差を軽減可能な導光板を提供することを目的とする。 Therefore, an object of the present invention is to provide a light guide plate that can reduce a luminance difference depending on a direction in which a pattern that looks shining is viewed.
　本発明の一つの形態として、可視光に対して透明な板状に形成された導光板が提供される。この導光板は、導光板の側壁のうち、可視光を発する光源に対向する側壁に形成される入射面と、導光板の一方の面に、所定のパターンに沿って配列され、光源から発して入射面から導光板内に入射した可視光を導光板の他方の面へ向けて反射する反射面を有する複数のプリズムとを有する。そして複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの反射面が同一方向を向き、かつ、所定のピッチよりも近接した二つのプリズムの反射面が互いに異なる方向を向くように、複数のプリズムのそれぞれが配置される。 As one embodiment of the present invention, a light guide plate formed in a plate shape transparent to visible light is provided. The light guide plate is arranged along a predetermined pattern on the incident surface formed on the side wall of the light guide plate facing the light source that emits visible light and on one surface of the light guide plate, and is emitted from the light source. And a plurality of prisms having a reflecting surface that reflects visible light that has entered the light guide plate from the incident surface toward the other surface of the light guide plate. The plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions. Each of the prisms is arranged.
　この導光板において、複数のプリズムのそれぞれは、所定のピッチよりも近接した二つのプリズムの反射面が導光板の一方の面に平行な面において光源と正対する方向を含む所定の角度範囲内で互いに異なる方向を向くように配置されることが好ましい。 In this light guide plate, each of the plurality of prisms is within a predetermined angle range including a direction in which the reflecting surfaces of the two prisms closer than a predetermined pitch face the light source in a plane parallel to one surface of the light guide plate. It is preferable that they are arranged so as to face different directions.
　この導光板において、所定のピッチは、観察者が複数のプリズムのうちの二つのプリズムを識別できる長さの最小値未満に設定されることが好ましい。 In this light guide plate, it is preferable that the predetermined pitch is set to be less than the minimum value of the length at which the observer can distinguish two prisms out of the plurality of prisms.
　また、この導光板は、各プリズムが形成される面における所定のパターンの位置に設けられる、そのパターンの形状を有する金属層をさらに有することが好ましい。 Further, it is preferable that the light guide plate further includes a metal layer having a pattern shape provided at a predetermined pattern position on the surface on which each prism is formed.
　本発明の他の形態として、可視光に対して透明な板状に形成された導光板が提供される。この導光板は、導光板の側壁のうち、可視光を発する光源に対向する側壁に形成される入射面と、導光板の一方の面に、所定のパターンに沿って配列され、光源から発して入射面から導光板内に入射した可視光を導光板の他方の面へ向けて反射する反射面を有する複数のプリズムとを有する。そして複数のプリズムのそれぞれは、所定のパターンを分割した複数の部分領域のそれぞれごとに、反射面が同一方向を向き、かつ、複数の部分領域のうちの隣接する二つの部分領域間で反射面が互いに異なる方向を向くように配置される。 As another embodiment of the present invention, a light guide plate formed in a plate shape transparent to visible light is provided. The light guide plate is arranged along a predetermined pattern on the incident surface formed on the side wall of the light guide plate facing the light source that emits visible light and on one surface of the light guide plate, and is emitted from the light source. And a plurality of prisms having a reflecting surface that reflects visible light that has entered the light guide plate from the incident surface toward the other surface of the light guide plate. Each of the plurality of prisms has a reflecting surface facing the same direction for each of the plurality of partial areas obtained by dividing the predetermined pattern, and the reflecting surface between two adjacent partial areas of the plurality of partial areas. Are arranged in different directions.
　また、この導光板は、各プリズムが形成される面における所定のパターンの位置に設けられる、そのパターンの形状を有する金属層をさらに有することが好ましい。 Further, it is preferable that the light guide plate further includes a metal layer having a pattern shape provided at a predetermined pattern position on the surface on which each prism is formed.
　本発明のさらに他の形態として、表示装置が提供される。この表示装置は、可視光を発する光源と、可視光に対して透明な板状に形成された導光板と、光源の点灯及び消灯を制御する制御部とを有する。
　導光板は、導光板の側壁の一辺に形成される、光源に対向する入射面と、導光板の一方の面に、所定のパターンに沿って配列され、光源から発して入射面から導光板内に入射した可視光を導光板の他方の面へ向けて反射する反射面を有する複数のプリズムとを有する。そして複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの反射面が同一方向を向き、かつ、所定のピッチよりも近接した二つのプリズムの反射面が互いに異なる方向を向くように、複数のプリズムのそれぞれが配置される。 As yet another embodiment of the present invention, a display device is provided. The display device includes a light source that emits visible light, a light guide plate that is formed in a plate shape transparent to visible light, and a control unit that controls turning on and off of the light source.
The light guide plate is arranged along a predetermined pattern on an incident surface facing the light source, formed on one side of the side wall of the light guide plate, and on one surface of the light guide plate, and emits from the light source and enters the light guide plate from the incident surface. And a plurality of prisms having a reflection surface that reflects the visible light incident on the light guide toward the other surface of the light guide plate. The plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions. Each of the prisms is arranged.
　本発明のさらに他の形態として、遊技機が提供される。この遊技機は、遊技機本体と、遊技機本体の遊技者と対向する側の面に設けられた表示装置とを有し、表示装置は、可視光を発する光源と、可視光に対して透明な板状に形成された導光板と、光源の点灯及び消灯を制御する制御部とを有する。
　そして導光板は、導光板の側壁の一辺に形成される、光源に対向する入射面と、導光板の一方の面に、所定のパターンに沿って配列され、光源から発して入射面から導光板内に入射した可視光を、遊技者と対向する側に設けられた導光板の他方の面へ向けて反射する反射面を有する複数のプリズムとを有する。そして複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの反射面が同一方向を向き、かつ、所定のピッチよりも近接した二つのプリズムの反射面が互いに異なる方向を向くように、複数のプリズムのそれぞれが配置される。 As yet another aspect of the present invention, a gaming machine is provided. This gaming machine has a gaming machine main body and a display device provided on a surface of the gaming machine main body facing the player, the display device being a light source that emits visible light, and transparent to visible light. A light guide plate formed in a flat plate shape and a control unit that controls turning on and off of the light source.
The light guide plate is arranged along a predetermined pattern on the incident surface facing the light source, formed on one side of the side wall of the light guide plate, and on one surface of the light guide plate. And a plurality of prisms having a reflective surface that reflects visible light incident therein toward the other surface of the light guide plate provided on the side facing the player. The plurality of prisms are arranged such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and the reflecting surfaces of the two prisms closer than the predetermined pitch face different directions. Each of the prisms is arranged.
　本発明に係る導光板は、光って見えるパターンの見る方向による輝度差を軽減できるという効果を奏する。 The light guide plate according to the present invention has an effect of reducing the luminance difference depending on the viewing direction of the pattern that looks shining.
図１は、本発明の一つの実施形態に係る表示装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a display device according to an embodiment of the present invention. 図２は、表示装置が有する導光板の概略正面図である。FIG. 2 is a schematic front view of a light guide plate included in the display device. 図３は、図２の矢印ＡＡ’で示される導光板の概略側面断面図である。FIG. 3 is a schematic side cross-sectional view of the light guide plate indicated by the arrow AA ′ in FIG. 2. 図４は、プリズムの配置を示す、パターンの一部の拡大平面図である。FIG. 4 is an enlarged plan view of a part of the pattern showing the arrangement of the prisms. 図５は、各プリズムの反射面の向きを同一としたときの角度ごとの照度分布のシミュレーション結果を表す図である。FIG. 5 is a diagram illustrating a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface of each prism is the same. 図６は、プリズムの反射面の向きを、光源と正対する向きを中心として、5°単位で±10°の角度範囲内でばらつかせたときの角度ごとの照度分布のシミュレーション結果を表す図である。FIG. 6 is a diagram showing a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface of the prism is varied within an angle range of ± 10 ° in units of 5 ° with the direction facing the light source as the center. It is. 図７は、第２の実施形態によるプリズムの配置を示す、パターンの一部の拡大平面図である。FIG. 7 is an enlarged plan view of a part of the pattern showing the arrangement of the prisms according to the second embodiment. 図８は、上記の各実施形態または変形例による表示装置を有する弾球遊技機を遊技者側から見た、その弾球遊技機の概略斜視図である。FIG. 8 is a schematic perspective view of the ball game machine having the display device according to each of the above-described embodiments or modifications as seen from the player side.
　以下、本発明の実施形態による表示装置を、図を参照しつつ説明する。この表示装置は、可視光に対して透明な材料を板状に形成した導光板を有し、その導光板の一方の面が観察者に面する出射面として形成される。そして出射面と対向する導光板の他方の面には、光源から発し、導光板の側壁に形成された入射面から導光板内に入射した可視光を出射面へ向けて反射する複数のプリズムが形成される。そして複数のプリズムのそれぞれは、表示装置が表示させるパターンの形状に合わせて配列される。そして各プリズムは、所定ピッチだけ離れたプリズムの反射面の向きが同一となり、所定ピッチよりも近接したプリズム同士の反射面の向きは所定の角度範囲内で異なるように配置され、これにより、パターンを見る方向による輝度差を軽減する。
　なお、以下では、説明の便宜上、観察者と対向する側を正面とし、その反対側を背面とする。 Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings. This display device has a light guide plate in which a material transparent to visible light is formed in a plate shape, and one surface of the light guide plate is formed as an exit surface facing an observer. On the other surface of the light guide plate facing the exit surface, there are a plurality of prisms that reflect the visible light emitted from the light source and incident into the light guide plate from the entrance surface formed on the side wall of the light guide plate toward the exit surface. It is formed. Each of the plurality of prisms is arranged in accordance with the shape of the pattern displayed by the display device. The prisms are arranged so that the directions of the reflecting surfaces of the prisms separated by a predetermined pitch are the same, and the directions of the reflecting surfaces of the prisms closer than the predetermined pitch are different within a predetermined angular range. Reduce the brightness difference depending on the viewing direction.
In the following, for convenience of explanation, the side facing the observer is the front and the opposite side is the back.
　図１は、本発明の一つの実施形態に係る表示装置の概略構成図である。表示装置１は、導光板２と、光源３と、制御部４とを有する。 FIG. 1 is a schematic configuration diagram of a display device according to an embodiment of the present invention. The display device 1 includes a light guide plate 2, a light source 3, and a control unit 4.
　導光板２は、光源３から発する可視光に対して透明な板状に形成された部材である。導光板２は、例えば、ポリメチルメタクリレート（ＰＭＭＡ）、ポリカーボネート、シクロオレフィンポリマーといった、可視光に対して透明な樹脂を成型することで形成される。そして導光板２は、光源３が点灯している間、光源３からの光をその内部で伝搬させるとともに、背面側に形成された、光源３に対応し、所定のパターン２２を形成するように配列された複数のプリズムにより、正面側に位置する観察者へ向けて反射させることで、観察者が発光するパターン２２を視認できるようにする。
　なお、導光板２の詳細については後述する。 The light guide plate 2 is a member formed in a plate shape transparent to visible light emitted from the light source 3. The light guide plate 2 is formed by molding a resin that is transparent to visible light, such as polymethyl methacrylate (PMMA), polycarbonate, or cycloolefin polymer. The light guide plate 2 propagates the light from the light source 3 while the light source 3 is lit, and forms a predetermined pattern 22 corresponding to the light source 3 formed on the back side. By reflecting the light toward the observer located on the front side by the plurality of arranged prisms, the observer can visually recognize the light emission pattern 22.
Details of the light guide plate 2 will be described later.
　光源３は、可視光を発する少なくとも一つの発光素子を有し、発光素子の発光面が導光板２の側壁のうちの一つである入射面２ａと対向するように配置される。そして光源３は、制御部４からの制御信号に応じて点灯または消灯する。制御部４が光源３を点灯させている間、光源３から発した光は、入射面２ａを介して導光板２内に入射し、導光板２内を直進または全反射しながら伝搬した後に導光板２の背面側の拡散面２ｂに形成された複数のプリズムで反射されて正面側の出射面２ｃから出射する。 The light source 3 has at least one light emitting element that emits visible light, and is disposed so that the light emitting surface of the light emitting element faces the incident surface 2 a that is one of the side walls of the light guide plate 2. The light source 3 is turned on or off according to a control signal from the control unit 4. While the control unit 4 lights the light source 3, the light emitted from the light source 3 enters the light guide plate 2 through the incident surface 2 a and is guided after propagating through the light guide plate 2 while traveling straight or totally. The light is reflected by a plurality of prisms formed on the diffusing surface 2b on the back side of the optical plate 2 and is emitted from the emitting surface 2c on the front side.
　なお、光源３が有する発光素子は、例えば、発光ダイオード、白熱灯あるいは蛍光灯である。 In addition, the light emitting element which the light source 3 has is a light emitting diode, an incandescent lamp, or a fluorescent lamp, for example.
　制御部４は、例えば、プロセッサと、メモリ回路と、光源３の駆動回路とを有する。そして制御部４は、上位の制御装置（図示せず）からの制御信号に応じて、光源３の点灯及び消灯を制御する。導光板２の正面側に位置する観察者からパターン２２が見えるようにする場合には、制御部４は、光源３を点灯させ、一方、観察者からパターン２２が見えないようにするためには光源３を消灯する。 The control unit 4 includes, for example, a processor, a memory circuit, and a drive circuit for the light source 3. And the control part 4 controls lighting and light extinction of the light source 3 according to the control signal from a high-order control apparatus (not shown). In order to make the pattern 22 visible to an observer located on the front side of the light guide plate 2, the control unit 4 turns on the light source 3 while making the pattern 22 invisible to the observer. The light source 3 is turned off.
　以下、導光板２の詳細について説明する。 Hereinafter, the details of the light guide plate 2 will be described.
　図２は、導光板２の概略正面図である。また図３は、図２の矢印ＡＡ’で示される線における、導光板２の概略側面断面図である。図２及び図３に示されるように、導光板２の側壁の一面に、光源３と対向する入射面２ａが形成される。光源３からの光は入射面２ａから導光板２の内部に入射する。そして導光板２の内部を、拡散面２ｂと出射面２ｃとの間で全反射されながら、あるいは直進しつつ伝搬した光は、導光板２の背面側に位置する拡散面２ｂに形成された複数のプリズム２１の何れかにて全反射された後、導光板２の正面側に位置し、かつ、拡散面２ｂと対向する出射面２ｃから出射する。複数のプリズム２１は、パターン２２を形成するように、パターン２２に沿って配列される。したがって、観察者は、光源３が点灯している間、導光板２の表面において発光して見えるパターン２２を観察できる。なお、図２及び図３において、図の見易さの向上のために、プリズム２１のサイズ及び導光板２の厚さは誇張されている点に留意されたい。 FIG. 2 is a schematic front view of the light guide plate 2. 3 is a schematic side sectional view of the light guide plate 2 taken along the line indicated by the arrow AA ′ in FIG. As shown in FIGS. 2 and 3, an incident surface 2 a facing the light source 3 is formed on one surface of the side wall of the light guide plate 2. Light from the light source 3 enters the light guide plate 2 from the incident surface 2a. The light propagating through the light guide plate 2 while being totally reflected between the diffusion surface 2b and the exit surface 2c or traveling straight is formed on the diffusion surface 2b located on the back side of the light guide plate 2. After being totally reflected by any of the prisms 21, the light is emitted from an emission surface 2 c that is located on the front side of the light guide plate 2 and faces the diffusion surface 2 b. The plurality of prisms 21 are arranged along the pattern 22 so as to form the pattern 22. Therefore, the observer can observe the pattern 22 that appears to emit light on the surface of the light guide plate 2 while the light source 3 is lit. 2 and 3, it should be noted that the size of the prism 21 and the thickness of the light guide plate 2 are exaggerated in order to improve the visibility of the drawings.
　複数のプリズム２１のそれぞれは、例えば、拡散面２ｂにおいて所定の長さを持つ略三角形状の溝として形成される。そして複数のプリズム２１のそれぞれは、拡散面２ｂに対して所定の角度をなす反射面２１ａを有する。なお、所定の角度は、導光板２へ入射した光源３からの光を全反射させて、出射面２ｃへ向ける角度、例えば、拡散面２ｂに対して４０°～５０°をなすように設定される。また所定の長さは、観察者の眼で、各プリズム２１を視認することができない程度の長さ、例えば、数μm～数10μm程度に設定される。 Each of the plurality of prisms 21 is formed, for example, as a substantially triangular groove having a predetermined length on the diffusion surface 2b. Each of the plurality of prisms 21 has a reflecting surface 21a that forms a predetermined angle with respect to the diffusing surface 2b. The predetermined angle is set so that the light from the light source 3 incident on the light guide plate 2 is totally reflected and directed to the emission surface 2c, for example, 40 ° to 50 ° with respect to the diffusion surface 2b. The The predetermined length is set to such a length that the prism 21 cannot be visually recognized by the observer's eyes, for example, about several μm to several tens of μm.
　図４は、プリズム２１の配置を示す、パターン２２の一部の拡大平面図である。各プリズム２１は、反射面２１ａが様々な方向を向くように配置されている。本実施形態では、互いに隣接する二つのプリズム２１が所定のピッチよりも狭い間隔となるように各プリズム２１は配置される。そして所定のピッチだけ離れた二つのプリズム２１の反射面２１ａが同一方向を向き、その所定のピッチよりも近接した二つのプリズム２１の反射面２１ａが、特定の方向を中心とする、拡散面２ｂに平行な面に沿って所定の角度範囲内で異なる方向を向くように、各プリズム２１は配置される。特定の方向は、例えば、光源３に対して反射面２１ａが正対する方向であり、所定の角度範囲は、光源３からの光が反射面２１ａで反射されて出射面２ｃから出射することが可能な角度範囲、例えば、±10°とすることができる。そして例えば、互いに隣接する二つのプリズム２１間の反射面２１ａの角度差は、例えば、4°～6°となるように、各プリズムは配置される。 FIG. 4 is an enlarged plan view of a part of the pattern 22 showing the arrangement of the prisms 21. Each prism 21 is arranged so that the reflecting surface 21a faces in various directions. In the present embodiment, the prisms 21 are arranged so that the two prisms 21 adjacent to each other have an interval smaller than a predetermined pitch. Then, the reflecting surfaces 21a of the two prisms 21 that are separated by a predetermined pitch face the same direction, and the reflecting surfaces 21a of the two prisms 21 that are closer than the predetermined pitch center on a specific direction. The prisms 21 are arranged so as to face different directions within a predetermined angle range along a plane parallel to the. The specific direction is, for example, the direction in which the reflection surface 21a faces the light source 3, and the predetermined angle range allows light from the light source 3 to be reflected by the reflection surface 21a and emitted from the emission surface 2c. A wide angle range, for example, ± 10 °. For example, each prism is arranged so that the angle difference of the reflecting surface 21a between two prisms 21 adjacent to each other is, for example, 4 ° to 6 °.
　また、反射面２１ａの向きが同一となる二つのプリズム（図４では、プリズム２１－１とプリズム２１－２）間のピッチが、観察者の眼で識別できる長さの最小値未満となることが好ましい。 In addition, the pitch between two prisms (the prism 21-1 and the prism 21-2 in FIG. 4) having the same direction of the reflecting surface 21a is less than the minimum length that can be identified by the observer's eyes. Is preferred.
　例えば、観察者が識別できる視角の最小値を、視力1.0相当の人の視角の最小値である1分とし、観察者と導光板２の想定される間隔を60cmとすると、反射面２１ａが同じ向きとなる二つのプリズム２１間のピッチは0.17mm以下であることが好ましい。ただし、本実施形態では、光源３が点灯している間、観察者からは各プリズム２１が発光して見えるので、観察者が識別できる視角の最小値に相当する長さよりも反射面２１ａの向きが同一となる二つのプリズム２１間の実際のピッチがもう少し広くても、各プリズム２１は識別され難い。そこで、反射面２１ａの向きが同一となる二つのプリズム２１間のピッチが、例えば、観察者の視点からの角度が0.1°に相当する長さとなるように、各プリズム２１は配置されてもよい。この場合、例えば、観察者と導光板２の想定される間隔を60cmとすると、ピッチは1mm以下となる。 For example, if the minimum viewing angle that can be identified by the observer is 1 minute, which is the minimum viewing angle of a person with a visual acuity of 1.0, and the assumed distance between the observer and the light guide plate 2 is 60 cm, the reflecting surface 21a is the same. It is preferable that the pitch between the two prisms 21 in the direction is 0.17 mm or less. However, in this embodiment, while the light source 3 is lit, each prism 21 appears to emit light from the observer, so the direction of the reflecting surface 21a is longer than the length corresponding to the minimum value of the viewing angle that can be identified by the observer. Even if the actual pitch between two prisms 21 having the same value is a little wider, each prism 21 is difficult to be identified. Therefore, the prisms 21 may be arranged so that the pitch between the two prisms 21 having the same orientation of the reflecting surface 21a is, for example, a length corresponding to an angle of 0.1 ° from the viewpoint of the observer. . In this case, for example, if the assumed distance between the observer and the light guide plate 2 is 60 cm, the pitch is 1 mm or less.
　このように複数のプリズム２１のそれぞれが配置されることで、プリズム２１によって光源３からの光が反射される方向が異なることになる。そのため、パターン２２を見る方向が異なっていても、パターン２２の明るさはそれほど変化しない。また、観察者の眼では、各プリズム２１の反射面２１ａの向きの違いによる輝度ムラを検知できないので、パターン２２全体が一様な輝度となっているように観察者に見せることができる。 Thus, by arranging each of the plurality of prisms 21, the direction in which the light from the light source 3 is reflected by the prisms 21 is different. Therefore, even if the direction in which the pattern 22 is viewed is different, the brightness of the pattern 22 does not change so much. In addition, since the observer's eyes cannot detect luminance unevenness due to the difference in direction of the reflecting surface 21a of each prism 21, it is possible to show the observer as if the entire pattern 22 has uniform luminance.
　図５は、各プリズム２１の反射面２１ａの向きを同一としたときの角度ごとの照度分布のシミュレーション結果を表す図である。図５において、横軸は、出射面２ｃの法線を通り、入射面２ａと直交する面における角度を表す。角度0°は、出射面２ｃの法線方向に対応する。縦軸は、想定される観察者の位置での照度を表す。そしてグラフ５００は、角度と照度の関係を表す。グラフ５００に示されるように、プリズム２１の反射面２１ａの向きを全て同一とした場合には、出射面２ｃの法線方向における照度に対して±2.5°程度で照度が半分となる。このことは、法線方向に近い角度からしか、パターン２２は明るく見えないことを示している。 FIG. 5 is a diagram showing a simulation result of the illuminance distribution for each angle when the direction of the reflecting surface 21a of each prism 21 is the same. In FIG. 5, the horizontal axis represents an angle in a plane that passes through the normal line of the exit surface 2c and is orthogonal to the entrance surface 2a. The angle 0 ° corresponds to the normal direction of the emission surface 2c. The vertical axis represents the illuminance at the assumed observer position. A graph 500 represents the relationship between the angle and the illuminance. As shown in the graph 500, when the directions of the reflecting surfaces 21a of the prisms 21 are all the same, the illuminance is halved at about ± 2.5 ° with respect to the illuminance in the normal direction of the emission surface 2c. This indicates that the pattern 22 appears bright only from an angle close to the normal direction.
　図６は、プリズム２１の反射面２１ａの向きを、光源３に正対する向きを中心として、拡散面２ｂに対して平行な面に沿って5°単位で±10°の角度範囲内でばらつかせたときの角度ごとの照度分布のシミュレーション結果を表す図である。図６において、横軸は、出射面２ｃの法線を通り、入射面２ａと直交する面における角度を表す。角度0°は、出射面２ｃの法線方向に対応する。縦軸は、想定される観察者の位置での照度を表す。そしてグラフ６００は、角度と照度の関係を表す。グラフ６００に示されるように、この例では、出射面２ｃの法線方向から±12.5°の範囲内での照度は、法線方向における照度の半分以上となる。このことから、反射面２１ａの向きを同一としたときと比較して、パターン２２が明るく見える角度範囲が大きく広がっていることが分かる。 In FIG. 6, the direction of the reflecting surface 21a of the prism 21 varies within an angular range of ± 10 ° in units of 5 ° along a plane parallel to the diffusing surface 2b with the direction facing the light source 3 as the center. It is a figure showing the simulation result of the illuminance distribution for every angle when letting. In FIG. 6, the horizontal axis represents an angle in a plane that passes through the normal line of the exit surface 2c and is orthogonal to the entrance surface 2a. The angle 0 ° corresponds to the normal direction of the emission surface 2c. The vertical axis represents the illuminance at the assumed observer position. A graph 600 represents the relationship between the angle and the illuminance. As shown in the graph 600, in this example, the illuminance within a range of ± 12.5 ° from the normal direction of the emission surface 2c is half or more of the illuminance in the normal direction. From this, it can be seen that the angular range in which the pattern 22 appears bright is greatly expanded compared to when the direction of the reflecting surface 21a is the same.
　以上に説明してきたように、この表示装置では、導光板に表示されるパターンを形成する複数のプリズムが、所定のピッチだけ離れた二つのプリズムの反射面が同じ方向を向き、かつ、所定のピッチよりも近接する二つのプリズムの反射面が異なる方向を向くように配置される。これにより、この表示装置は、光源からの光が特定方向に反射されるだけでなく、その周囲の方向にも反射されるので、パターンを見る方向による輝度のバラツキを軽減できる。 As described above, in this display device, the plurality of prisms forming the pattern displayed on the light guide plate are such that the reflecting surfaces of the two prisms separated by a predetermined pitch face the same direction, and It arrange | positions so that the reflective surface of two prisms which adjoin rather than a pitch may face a different direction. As a result, the display device not only reflects light from the light source in a specific direction but also in the surrounding direction, so that variations in luminance depending on the direction in which the pattern is viewed can be reduced.
　次に、第２の実施形態による表示装置について説明する。この表示装置は、第１の実施形態とは逆に、パターンの部分領域ごとに、明るく見える方向を異ならせるために、パターンの部分領域単位で、その部分領域内に配置されるプリズムの反射面の向きを異ならせる。なお、第１の実施形態と第２の実施形態とでは、パターンを形成するプリズムの配置のみが異なる。そこで以下では、プリズムの配置について説明する。第２の実施形態による表示装置の他の部分については、第１の実施形態による表示装置の対応する部分の説明を参照されたい。 Next, a display device according to the second embodiment will be described. In contrast to the first embodiment, this display device has a reflecting surface of a prism arranged in each partial area of the pattern in order to change the direction in which the pattern appears bright in each partial area. Change the direction of. The first embodiment and the second embodiment differ only in the arrangement of prisms that form a pattern. Therefore, the arrangement of the prism will be described below. For other parts of the display device according to the second embodiment, refer to the description of the corresponding part of the display device according to the first embodiment.
　図７は、第２の実施形態によるプリズム２１の配置を示す、パターン２２の一部の拡大平面図である。この変形例では、パターン２２は、複数の部分領域２３－１～２３－ｎ（ただし、ｎは２以上の整数、図７の例では、ｎ＝３）に分割される。個々の部分領域２３－１～２３－ｎ内では、その部分領域内の各プリズム２１の反射面２１ａは同一方向に向けられ、一方、互いに隣接する二つの部分領域間では、プリズム２１の反射面２１ａの向きは異なるように、各プリズム２１は配置される。例えば、部分領域２３－１内に含まれる各プリズム２１は、その反射面２１ａが光源３と正対するように配置される。そのため、部分領域２３－１では、光源３から導光板２内へ入射した光は、部分領域２３－１内の各プリズム２１によって、出射面２ｃの法線方向へ向けられる。一方、部分領域２３－１と隣接する部分領域２３－２に含まれる各プリズム２１は、その反射面２１ａが、光源３と正対する方向から、出射面２ｃの法線方向を回転軸として10°傾くように配置される。そのため、部分領域２３－２では、光源３から導光板２内へ入射した光は、部分領域２３－２内の各プリズム２１によって、反射面２１ａの正対方向からの傾きに応じた角度だけ、出射面２ｃの法線方向からずれた方向へ向けられる。その結果、観察者が出射面２ｃの正面側から導光板２を見た場合、パターン２２のうちの部分領域２３－１は比較的明るく見えるが、パターン２２のうちの部分領域２３－２は比較的暗く見える。 FIG. 7 is an enlarged plan view of a part of the pattern 22 showing the arrangement of the prisms 21 according to the second embodiment. In this modification, the pattern 22 is divided into a plurality of partial regions 23-1 to 23-n (where n is an integer equal to or greater than 2, n = 3 in the example of FIG. 7). In each of the partial areas 23-1 to 23-n, the reflecting surface 21a of each prism 21 in the partial area is directed in the same direction, while the reflecting surface of the prism 21 is between two adjacent partial areas. Each prism 21 is arranged so that the direction of 21a is different. For example, each prism 21 included in the partial region 23-1 is arranged so that the reflection surface 21 a faces the light source 3. Therefore, in the partial region 23-1, light incident from the light source 3 into the light guide plate 2 is directed in the normal direction of the emission surface 2c by each prism 21 in the partial region 23-1. On the other hand, each prism 21 included in the partial region 23-2 adjacent to the partial region 23-1 has a reflection surface 21a of 10 ° with the normal direction of the emission surface 2c as the rotation axis from the direction facing the light source 3. It is arranged to tilt. Therefore, in the partial region 23-2, the light incident from the light source 3 into the light guide plate 2 is caused by the prisms 21 in the partial region 23-2 by an angle corresponding to the inclination of the reflecting surface 21a from the directly facing direction. The direction is shifted from the normal direction of the emission surface 2c. As a result, when the observer views the light guide plate 2 from the front side of the exit surface 2c, the partial area 23-1 of the pattern 22 looks relatively bright, but the partial area 23-2 of the pattern 22 is compared. Looks dark.
　各部分領域のサイズは、パターン２２内で明るさを略同一とするサイズに設定され、複数のプリズム２１を含むサイズとすることが好ましい。また、部分領域ごとにサイズが異なっていてもよく、あるいは、各部分領域のサイズは同一であってもよい。また、部分領域ごとのプリズム２１の反射面２１ａの向きは、予め設定された二つの方向の何れかであってもよく、あるいは、予め設定された三つ以上の方向の何れかであってもよい。 The size of each partial region is preferably set to a size in which the brightness is substantially the same in the pattern 22 and includes a plurality of prisms 21. Moreover, the size may differ for every partial area, or the size of each partial area may be the same. In addition, the direction of the reflecting surface 21a of the prism 21 for each partial region may be any of two preset directions, or may be any of three or more preset directions. Good.
　この実施形態によれば、表示装置は、部分領域単位で各プリズムの反射面の向きを変化させることでパターン内に明るさの分布を生じさせることができる。そのため、この変形例では、明るさが比較的低い部分領域内のプリズムのサイズを小さくしなくてもよい。そのため、明るさが比較的低い部分領域内のプリズムの加工が困難となることが抑制される。またこの実施形態では、比較的暗い部分領域におけるプリズムの配置密度を低下させなくてもよいので、プリズムが有る部分とプリズムが無い部分との輝度差によるチラつきが防止される。 According to this embodiment, the display device can generate a brightness distribution in the pattern by changing the direction of the reflecting surface of each prism in units of partial areas. Therefore, in this modification, it is not necessary to reduce the size of the prism in the partial region where the brightness is relatively low. Therefore, it becomes possible to prevent the processing of the prism in the partial area having relatively low brightness from becoming difficult. Further, in this embodiment, since it is not necessary to reduce the arrangement density of the prisms in the relatively dark partial area, flickering due to a luminance difference between the part having the prism and the part having no prism is prevented.
　なお、上記の各実施形態または変形例による表示装置において、二つのプリズムの反射面の向きを互いに異ならせる際、拡散面２ｂに平行な面内で、すなわち、拡散面２ｂ（あるいは出射面２ｃ）の法線方向を回転軸として反射面２１ａを回転させる代わりに、あるいは、その回転とともに、拡散面２ｂに対して反射面２１ａがなす角を異ならせてもよい。この場合も、拡散面２ｂに対して反射面２１ａがなす角が変われば、出射面２ｃから出射する光の角度が変化するので、上記の各実施形態または変形例による表示装置と同様の効果が得られる。 In the display device according to each of the above-described embodiments or modifications, when the directions of the reflecting surfaces of the two prisms are different from each other, they are in a plane parallel to the diffusing surface 2b, that is, the diffusing surface 2b (or the emitting surface 2c) Instead of rotating the reflecting surface 21a with the normal direction of the rotation axis as the axis of rotation, or together with the rotation, the angle formed by the reflecting surface 21a with respect to the diffusing surface 2b may be varied. Also in this case, if the angle formed by the reflecting surface 21a with respect to the diffusing surface 2b is changed, the angle of the light emitted from the emitting surface 2c is changed, so that the same effect as the display device according to each of the above embodiments or modifications is obtained. can get.
　上記の各実施形態の他の変形例によれば、導光板２の拡散面２ｂにおいて、複数のプリズムにより形成されるパターンに相当する位置のみに金属層が設けられてもよい。そのような金属層は、例えば、拡散面２ｂから各プリズムの頂点までの深さが5μm～50μmである場合、そのパターン以外の部分をマスクした上でスパッタリング、蒸着あるいはメッキ処理を行うことで形成される。この場合、金属層は、例えば、0.001～10μm程度の厚さを持つ薄膜となる。一方、拡散面２ｂから各プリズムの頂点までの深さが50μmよりも大きい場合には、拡散面２ｂのそのパターンの位置に、そのパターンの形状に形成された金属シールを貼付することでその金属層が形成される。この場合、金属層は、例えば、10μmかそれ以上の厚さとなる。 According to another modification of each of the above-described embodiments, the metal layer may be provided only at a position corresponding to a pattern formed by a plurality of prisms on the diffusing surface 2b of the light guide plate 2. For example, when the depth from the diffusion surface 2b to the apex of each prism is 5 μm to 50 μm, such a metal layer is formed by performing sputtering, vapor deposition, or plating after masking portions other than the pattern. Is done. In this case, the metal layer is a thin film having a thickness of about 0.001 to 10 μm, for example. On the other hand, when the depth from the diffusion surface 2b to the apex of each prism is larger than 50 μm, the metal seal formed in the shape of the pattern is affixed to the position of the pattern on the diffusion surface 2b. A layer is formed. In this case, the metal layer has a thickness of 10 μm or more, for example.
　このように、パターンの部分に金属層を設けることで、表示装置は、光源３が消灯されていても、出射面２ｃ側から導光板２を見る観察者に対して、金属的な質感を持つパターンを表示することができる。またこの変形例では、表示装置は、出射面２ｃ側から導光板２を見る観察者に対して、光源３を点灯することで、その金属層の色及び光源３からの発光色に応じた、金属的な質感を持ちつつ発光するように見えるパターンを表示することができる。 Thus, by providing the metal layer in the pattern portion, the display device has a metallic texture for an observer who views the light guide plate 2 from the emission surface 2c side even when the light source 3 is turned off. A pattern can be displayed. Further, in this modification, the display device turns on the light source 3 for an observer who views the light guide plate 2 from the emission surface 2c side, so that the color corresponds to the color of the metal layer and the emission color from the light source 3. A pattern that appears to emit light while having a metallic texture can be displayed.
　上記の各実施形態または変形例による表示装置は、弾球遊技機または回胴遊技機といった遊技機に搭載されてもよい。
　図８は、上記の各実施形態または変形例による表示装置を有する弾球遊技機を遊技者側から見た、その弾球遊技機の概略斜視図である。図８に示すように、弾球遊技機１００は、上部から中央部の大部分の領域に設けられ、遊技機本体である遊技盤１０１と、遊技盤１０１の下方に配設された球受け部１０２と、ハンドルを備えた操作部１０３と、遊技盤１０１の略中央に設けられた液晶ディスプレイ１０４と、液晶ディスプレイ１０４の前面に配置された、表示装置１０５とを有する。 The display device according to each of the above-described embodiments or modifications may be mounted on a gaming machine such as a ball game machine or a spinning game machine.
FIG. 8 is a schematic perspective view of the ball game machine having the display device according to each of the above-described embodiments or modifications as seen from the player side. As shown in FIG. 8, the ball game machine 100 is provided in a large area from the top to the center, and includes a game board 101 that is a main body of the game machine, and a ball receiving part that is disposed below the game board 101. 102, an operation unit 103 having a handle, a liquid crystal display 104 provided in the approximate center of the game board 101, and a display device 105 disposed on the front surface of the liquid crystal display 104.
　また弾球遊技機１００は、遊技の演出のために、遊技盤１０１の前面において遊技盤１０１の下方または表示装置１０５の周囲に配置された役物１０６を有する。また遊技盤１０１の側方にはレール１０７が配設されている。また遊技盤１０１上には多数の障害釘（図示せず）及び少なくとも一つの入賞装置１０８が設けられている。 Also, the ball game machine 100 has an accessory 106 arranged below the game board 101 or around the display device 105 on the front surface of the game board 101 in order to produce a game. A rail 107 is disposed on the side of the game board 101. On the game board 101, a number of obstacle nails (not shown) and at least one winning device 108 are provided.
　操作部１０３は、遊技者の操作によるハンドルの回動量に応じて図示しない発射装置より所定の力で遊技球を発射する。発射された遊技球は、レール１０７に沿って上方へ移動し、多数の障害釘の間を落下する。そして遊技球が何れかの入賞装置１０８に入ったことを、図示しないセンサにより検知すると、遊技盤１０１の背面に設けられた主制御回路（図示せず）は、遊技球が入った入賞装置１０８に応じた所定個の遊技球を玉払い出し装置（図示せず）を介して球受け部１０２へ払い出す。さらに主制御回路は、遊技盤１０１の背面に設けられた演出用CPU（図示せず）を介して液晶ディスプレイ１０４及び表示装置１０５を駆動する。 The operation unit 103 launches a game ball with a predetermined force from a launching device (not shown) according to the turning amount of the handle by the player's operation. The launched game ball moves upward along the rail 107 and falls between a number of obstacle nails. When it is detected by a sensor (not shown) that a game ball has entered any of the winning devices 108, a main control circuit (not shown) provided on the back of the gaming board 101 causes the winning device 108 containing the game balls to enter. A predetermined number of game balls corresponding to the above are paid out to the ball receiving portion 102 via a ball payout device (not shown). Further, the main control circuit drives the liquid crystal display 104 and the display device 105 via an effect CPU (not shown) provided on the back of the game board 101.
　表示装置１０５は、上記の各実施形態または変形例による表示装置の一例であり、導光板の出射面が遊技者へ向くように遊技盤１０１に取り付けられる。そして表示装置１０５の制御部は、遊技の状態に応じた、演出用CPUからの制御信号に応じて、光源を点灯させて、遊技者が、液晶ディスプレイ１０４に表示された映像とともに所定のパターンを視認できるようにする。あるいは、制御部は、光源を消灯して、遊技者が、導光板を介して液晶ディスプレイ１０４に表示された映像のみを観察できるようにしてもよい。 The display device 105 is an example of a display device according to each of the above-described embodiments or modifications, and is attached to the game board 101 so that the exit surface of the light guide plate faces the player. Then, the control unit of the display device 105 turns on the light source according to the control signal from the effect CPU according to the game state, and the player displays a predetermined pattern together with the video displayed on the liquid crystal display 104. Make it visible. Alternatively, the control unit may turn off the light source so that the player can observe only the video displayed on the liquid crystal display 104 via the light guide plate.
　このように、当業者は、本発明の範囲内で、実施される形態に合わせて様々な変更を行うことができる。 Thus, those skilled in the art can make various changes in accordance with the embodiment to be implemented within the scope of the present invention.
　１　　表示装置
　２　　導光板
　２ａ　　入射面
　２ｂ　　拡散面
　２ｃ　　出射面
　３　　光源
　２１　　プリズム
　２１ａ　　反射面
　２２　　パターン
　２３－１～２３－ｎ　　部分領域
　４　　制御部
　１００　　弾球遊技機
　１０１　　遊技盤
　１０２　　球受け部
　１０３　　操作部
　１０４　　液晶ディスプレイ
　１０５　　表示装置
　１０６　　役物
　１０７　　レール
　１０８　　入賞装置 DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Light-guide plate 2a Incidence surface 2b Diffusion surface 2c Output surface 3 Light source 21 Prism 21a Reflection surface 22 Pattern 23-1-23-n Partial area | region 4 Control part 100 Ball game machine 101 Game board 102 Ball receiving part 103 Operation Part 104 liquid crystal display 105 display device 106 accessory 107 rail 108 winning device

Claims (8)

  1. 　可視光に対して透明な板状に形成された導光板であって、
    　前記導光板は、
    　前記導光板の側壁のうち、可視光を発する光源に対向する側壁に形成される入射面と、
    　前記導光板の一方の面に、所定のパターンに沿って配列され、前記光源から発して前記入射面から前記導光板内に入射した可視光を前記導光板の他方の面へ向けて反射する反射面を有する複数のプリズムと、
    を有し、
    　前記複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの前記反射面が同一方向を向き、かつ、前記所定のピッチよりも近接した二つのプリズムの前記反射面が互いに異なる方向を向くように、前記複数のプリズムのそれぞれが配置される、導光板。     A light guide plate formed in a plate shape transparent to visible light,
    The light guide plate is
    Of the side walls of the light guide plate, an incident surface formed on a side wall facing a light source that emits visible light,
    A reflection that is arranged along a predetermined pattern on one surface of the light guide plate and reflects visible light emitted from the light source and entering the light guide plate from the incident surface toward the other surface of the light guide plate. A plurality of prisms having surfaces;
    Have
    Among the plurality of prisms, the reflecting surfaces of two prisms separated by a predetermined pitch are directed in the same direction, and the reflecting surfaces of two prisms close to the predetermined pitch are directed in different directions. A light guide plate in which each of the plurality of prisms is disposed.
  2. 　前記複数のプリズムのそれぞれは、前記所定のピッチよりも近接した前記二つのプリズムの前記反射面が前記一方の面に平行な面において前記光源と正対する方向を含む所定の角度範囲内で互いに異なる方向を向くように配置される、請求項１に記載の導光板。 Each of the plurality of prisms is different from each other within a predetermined angle range including a direction in which the reflecting surfaces of the two prisms close to the predetermined pitch are parallel to the one surface and facing the light source. The light guide plate according to claim 1, wherein the light guide plate is disposed to face the direction.
  3. 　前記所定のピッチは、観察者が前記複数のプリズムのうちの二つのプリズムを識別できる長さの最小値未満に設定される、請求項１または２に記載の導光板。 3. The light guide plate according to claim 1, wherein the predetermined pitch is set to be less than a minimum value of a length with which an observer can distinguish two prisms of the plurality of prisms.
  4. 　前記導光板の前記一方の面における前記所定のパターンの位置に設けられる、前記所定のパターンの形状を有する金属層をさらに有する、請求項１～３の何れか一項に記載の導光板。 The light guide plate according to any one of claims 1 to 3, further comprising a metal layer having a shape of the predetermined pattern provided at a position of the predetermined pattern on the one surface of the light guide plate.
  5. 　可視光に対して透明な板状に形成された導光板であって、
    　前記導光板は、
    　前記導光板の側壁のうち、可視光を発する光源に対向する側壁に形成される入射面と、
    　前記導光板の一方の面に、所定のパターンに沿って配列され、前記光源から発して前記入射面から前記導光板内に入射した可視光を前記導光板の他方の面へ向けて反射する反射面を有する複数のプリズムと、
    を有し、
    　前記複数のプリズムのそれぞれは、前記所定のパターンを分割した複数の部分領域のそれぞれごとに、前記反射面が同一方向を向き、かつ、前記複数の部分領域のうちの隣接する二つの部分領域間で前記反射面が互いに異なる方向を向くように配置される、導光板。     A light guide plate formed in a plate shape transparent to visible light,
    The light guide plate is
    Of the side walls of the light guide plate, an incident surface formed on a side wall facing a light source that emits visible light,
    A reflection that is arranged along a predetermined pattern on one surface of the light guide plate and reflects visible light emitted from the light source and entering the light guide plate from the incident surface toward the other surface of the light guide plate. A plurality of prisms having surfaces;
    Have
    Each of the plurality of prisms includes, for each of a plurality of partial areas obtained by dividing the predetermined pattern, the reflective surface faces in the same direction, and between two adjacent partial areas of the plurality of partial areas. The light guide plate is disposed so that the reflecting surfaces face in different directions.
  6. 　前記導光板の前記一方の面における前記所定のパターンの位置に設けられる、前記所定のパターンの形状を有する金属層をさらに有する、請求項５に記載の導光板。 The light guide plate according to claim 5, further comprising a metal layer having a shape of the predetermined pattern provided at a position of the predetermined pattern on the one surface of the light guide plate.
  7. 　可視光を発する光源と、
    　可視光に対して透明な板状に形成された導光板と、
    　前記光源の点灯及び消灯を制御する制御部と、
    を有し、
    　前記導光板は、
    　　前記導光板の側壁の一辺に形成される、前記光源に対向する入射面と、
    　　前記導光板の一方の面に、所定のパターンに沿って配列され、前記光源から発して前記入射面から前記導光板内に入射した可視光を前記導光板の他方の面へ向けて反射する反射面を有する複数のプリズムと、
    を有し、
    　前記複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの前記反射面が同一方向を向き、かつ、前記所定のピッチよりも近接した二つのプリズムの前記反射面が互いに異なる方向を向くように、前記複数のプリズムのそれぞれが配置される、
    表示装置。     A light source that emits visible light;
    A light guide plate formed in a plate shape transparent to visible light;
    A control unit for controlling turning on and off of the light source;
    Have
    The light guide plate is
    An incident surface facing the light source, formed on one side of the side wall of the light guide plate;
    A reflection that is arranged along a predetermined pattern on one surface of the light guide plate and reflects visible light emitted from the light source and entering the light guide plate from the incident surface toward the other surface of the light guide plate. A plurality of prisms having surfaces;
    Have
    Among the plurality of prisms, the reflecting surfaces of two prisms separated by a predetermined pitch are directed in the same direction, and the reflecting surfaces of two prisms close to the predetermined pitch are directed in different directions. Each of the plurality of prisms is disposed.
    Display device.
  8. 　遊技機本体と、
    　前記遊技機本体の遊技者と対向する側の面に設けられた表示装置とを有し、
    　前記表示装置は、
    　可視光を発する光源と、
    　可視光に対して透明な板状に形成された導光板と、
    　前記光源及びの点灯及び消灯を制御する制御部と、
    を有し、
    　前記導光板は、
    　　前記導光板の側壁の一辺に形成される、前記光源に対向する入射面と、
    　　前記導光板の一方の面に、所定のパターンに沿って配列され、前記光源から発して前記入射面から前記導光板内に入射した可視光を前記導光板の他方の面へ向けて反射する反射面を有する複数のプリズムと、
    を有し、
    　前記複数のプリズムのうち、所定のピッチだけ離れた二つのプリズムの前記反射面が同一方向を向き、かつ、前記所定のピッチよりも近接した二つのプリズムの前記反射面が互いに異なる方向を向くように、前記複数のプリズムのそれぞれが配置される、
    遊技機。     A gaming machine body,
    A display device provided on a surface of the gaming machine main body facing the player,
    The display device
    A light source that emits visible light;
    A light guide plate formed in a plate shape transparent to visible light;
    A control unit for controlling turning on and off of the light source;
    Have
    The light guide plate is
    An incident surface facing the light source, formed on one side of the side wall of the light guide plate;
    A reflection that is arranged along a predetermined pattern on one surface of the light guide plate and reflects visible light emitted from the light source and entering the light guide plate from the incident surface toward the other surface of the light guide plate. A plurality of prisms having surfaces;
    Have
    Among the plurality of prisms, the reflecting surfaces of two prisms separated by a predetermined pitch are directed in the same direction, and the reflecting surfaces of two prisms close to the predetermined pitch are directed in different directions. Each of the plurality of prisms is disposed.
    Gaming machine.
PCT/JP2015/079229 2014-12-25 2015-10-15 Light guide plate, display device, and game machine WO2016103865A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111133349A (en) * 2017-03-14 2020-05-08 欧姆龙株式会社 Light guide, display device, and game machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06250025A (en) * 1993-02-26 1994-09-09 Purasuto Waaku:Kk Light diffusing device
JP2002108257A (en) * 2000-09-28 2002-04-10 Toyoda Gosei Co Ltd Illumination device
JP2009282414A (en) * 2008-05-26 2009-12-03 Sun Corp Image display device
JP2010108795A (en) * 2008-10-31 2010-05-13 Seiko Instruments Inc Illumination device, and display device
JP2012040243A (en) * 2010-08-20 2012-03-01 Sankyo Co Ltd Game machine
JP2012194291A (en) * 2011-03-15 2012-10-11 Omron Corp Surface light source device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06250025A (en) * 1993-02-26 1994-09-09 Purasuto Waaku:Kk Light diffusing device
JP2002108257A (en) * 2000-09-28 2002-04-10 Toyoda Gosei Co Ltd Illumination device
JP2009282414A (en) * 2008-05-26 2009-12-03 Sun Corp Image display device
JP2010108795A (en) * 2008-10-31 2010-05-13 Seiko Instruments Inc Illumination device, and display device
JP2012040243A (en) * 2010-08-20 2012-03-01 Sankyo Co Ltd Game machine
JP2012194291A (en) * 2011-03-15 2012-10-11 Omron Corp Surface light source device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111133349A (en) * 2017-03-14 2020-05-08 欧姆龙株式会社 Light guide, display device, and game machine
CN111133349B (en) * 2017-03-14 2021-12-21 欧姆龙株式会社 Light guide, display device, and game machine

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