JP2003029674A - Back light for display sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back light for a display sheet capable of changing over and lighting up white light and colored light for making characters and the like of the display sheet emit light by using efficiently light emitting diodes having a plurality of colors. SOLUTION: This back light is provided with a plurality of sections 7a to 7c and phosphors arranged in respective sections 7a to 7c. Characters and the like are transmitted to be lighted up by illuminating a display sheet 5 on which the characters and like are displayed corresponding to the sections 7a to 7c from the back of it with phosphors for every section 7a to 7c. Moreover, each of phosphors which are arranged in the respective section 7a to 7c is constituted of a light emitting diode group 30 which is provided with light emitting diodes having a plurality of colors which becomes white color by additive color mixing. Then, a light diffusing sheet 8 and a mat sheet 9 are successively arranged between the light emitting diode groups 30 and the display sheet 5.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game machine such as a slot machine, a pachinko machine, a pinball game machine, an arrangement ball game machine, and a sign in a store or a store. The present invention relates to a backlight of a display sheet used for, for example, a display sheet. More specifically, a display sheet including a plurality of sections and a luminous body arranged in each section, and displaying a display sheet on which characters, graphics, or symbols (hereinafter, “characters, etc.”) are displayed in correspondence with the sections from the back side. The present invention relates to a backlight of a display sheet for illuminating the characters and the like in a transparent manner by illuminating each of the sections with the light emitter. Conventionally, incandescent lamps, white light-emitting diodes, and the like have been used as a light-emitting body in a backlight of a rotating display sheet such as a roulette wheel. In particular, a white light emitting diode has an advantage that it is not necessary to consider a light source color when determining a color of a character or the like to be drawn on a display sheet since a light source color is flat. However, only the blinking of the white light emitting diode does not change the light emission of the display sheet and is monotonous. Therefore, if a colored light emitting diode is arranged in each section, it is possible to change the blinking light emission color. However, in consideration of the emission color of the display sheet, the white light emitting diode must be used together, which is inefficient. [0004] In view of such a conventional situation, the present invention provides a white light and a colored light for emitting characters and the like on a display sheet by efficiently using light emitting diodes of a plurality of colors. It is an object of the present invention to provide a backlight of a display sheet capable of switching and lighting. [0005] In order to achieve the above object, the backlight of the display sheet according to the present invention has the following features.
A plurality of sections, and a luminous body arranged in each section, and the characters and the like by illuminating the display sheet on which characters and the like are displayed corresponding to the sections from the back side of the display sheet with the luminous bodies for each of the sections. In the configuration for transmitting and lighting, the luminous body arranged in each section is composed of light emitting diodes of a plurality of colors that become white by additive color mixture, and a light diffusion sheet and a mat sheet are sequentially arranged between these light emitting diodes and the display sheet. It has been arranged. Here, the light diffusion sheet diffuses the light of the light emitting diodes in at least a two-dimensional direction along the sheet, and it is preferable that the light diffusion sheet is disposed apart from the light emitting diodes. Further, by arranging the light emitting diodes in a triangular shape in a plan view, it is possible to more evenly mix light source colors. In the following embodiments of the present invention, RGB light emitting diodes are used as the light emitting diodes of the plurality of colors. In addition, in this specification, R is red (Red),
G means green, and B means blue. Next, referring to the accompanying drawings,
The present invention will be described in more detail. FIG. 1 is a perspective view of a reel unit 1 used in a slot machine. The reel unit 1 is provided on a frame 2 with reference numerals 3a to 3c.
One reel is rotatably supported. Each reel 3a ~
Reference numeral 3c denotes a structure in which a display sheet 5 on which characters 6 are printed is attached to a reel drum 4 whose rotation is controlled by a stepping motor and an encoder. A backlight unit 7 is disposed inside each of the reel drums 4, and a display sheet 5 is formed by light-emitting diodes housed in three sections indicated by reference numerals 7a to 7c.
Is illuminated from the back side, and the characters 6 are displayed in a transparent manner. The pitch of each character 6 corresponds to the pitch of the preceding sections 7a to 7c, and only the corresponding portion of the backlight unit is displayed on the window of a slot machine (not shown). The rotation of each of the reels 3a to 3c can be individually controlled, and the reels 3a to 3c can be individually stopped by pressing buttons provided corresponding to the respective reels. Then, when the combination of the characters 6 stopped at the position of the middle section 7b becomes a predetermined combination, a medal or a premium is issued. As shown in FIGS. 1 to 3, the backlight unit 7 generally includes a case 10, a substrate 20, a light emitting diode group 30, a light diffusion sheet 8 and a mat sheet 9 which are sequentially arranged on the case 10. And Case 10
Is mounted on the frame 2 via the mounting portion 11, and is partitioned into two places by a partition 13 in which the inside of an enclosure 12 formed in a truncated pyramid shape is formed in a mountain shape, and three partitions 7 a to 7 c are formed. is there. The case 10 is formed of a plastic material such as white so as to easily reflect light, and the inside of each of the sections 7a to 7c is formed in a truncated pyramid shape so as to easily diffuse light. As the light source in this embodiment, three sets of light emitting diode groups 30, each of which is a combination of RGB light emitting diodes 31, 32, 33, are used in each of the sections 7a to 7c. The RGB light emitting diodes 31, 32, and 33 are attached to the substrate 20 so that each light emitting diode group 30 forms an equilateral triangle in plan view. The lighting of each of the RGB light emitting diodes 31, 32, and 33 can be individually controlled by a control device (not shown). FIG. 2 is an exploded cross-sectional view. In the backlight unit 7, the light diffusion sheet 8 and the mat sheet 9 have bent portions 8x and 9x which are bent substantially at right and left ends at upper and lower ends, respectively, on the upper and lower sides of the case 10. Each is locked and fixed with an adhesive tape (not shown).
The light diffusion sheet 8 and the light emitting diode group 30 are appropriately separated from each other so that light can be diffused in two-dimensional directions, which will be described later. The mat sheet 9 is the light diffusion sheet 8
However, the display sheet 5 is slightly separated from the mat sheet 9 so as to avoid contact. FIG. 4A is a partially enlarged view of the front surface of the light diffusion sheet 8, and FIG. 4B is a sectional view taken along the line AA of FIG.
Shown in By filling a transparent resin in a mold having a fine regular pattern formed thereon and pressing the transparent resin film 8x on the transparent resin film 8x, a square pyramid regular pattern having a vertex 8b and a lower edge 8c having a square shape is formed. The light diffusion sheet 8 is formed by printing as the protruding portion 8a. For example, Japanese Patent No. 3131
As disclosed in No. 771, by printing a regular pattern on both sides of a transparent film, it is possible to obtain a three-dimensional effect such as further raising a light source. However, the essence of the present invention is to diffuse the light over a wider two-dimensional plane in order to obtain a homogeneous mixture of source colors. FIG. 5 is a plan view showing a state in which the light of the light emitting diode group 30 is diffused by using the light diffusion sheet 8 as described above. The light of the R light-emitting diodes 31 indicated by black squares in the center light-emitting diode group 30 spreads in four directions as an R light-emitting diode image 41 indicated by white squares by the action of the light diffusion sheet 8, connecting four white squares. A linear afterimage is formed along the side and the two-diagonal dashed line. The light of the G and B light emitting diodes 32 and 33 indicated by black circles and triangles spreads in four directions as G and B light emitting diode images 42 and 43 also indicated by white circles and triangles by the action of the light diffusion sheet 8. Then, the image of the central light emitting diode group 30 is diffused in the two-dimensional direction so as to project five sets of light emitting diode group images 40 in the center and in four directions. The light emitting diode group images 40 regularly diffused in the two-dimensional direction, in combination with the afterimage of linear light, promote more uniform mixing of light source colors. Light from the light emitting diode group 30 diffused in the two-dimensional direction by the light diffusion sheet 8 is further mixed by the mat sheet 9. On the back surface of the display sheet 5, the above-mentioned characters 6 and the like are printed by multicolor printing, and further, white (so-called white solid) is printed on a plain plate. Diffusion of light is further promoted by this white solid, and a more uniform mixture of light source colors can be obtained. The respective characteristics of the RGB light emitting diodes 31, 32 and 33 are appropriately selected by referring to the characteristics of the chromaticity diagram so that the mixed color becomes white light by additive color mixing. In addition, since each light emitting diode can be individually lit, a total of seven types of color expression of single light, two-color light, and three-color light can be realized. Even with two-color lighting, a more uniform mixture of light source colors can be obtained.
Also in the case of three-color mixing, more uniform light source color mixing can be obtained by arranging the RGB light emitting diodes in a triangle as described above than in a linear arrangement. When the reel unit 1 shown in FIG. 1 is used, coins are inserted into a slot (not shown), and the reels 3a to 3c start rotating. At this time, the light emitting diodes 31 to 33 may be used depending on the type of game or chance.
To change the blinking pattern. All the RGB light emitting diodes 31 to 31 for each light emitting diode group 30
By turning on 33, white light can be obtained, and each section 7a-
By repeating lighting and extinguishing sequentially for each 7c, a flowing effect can be performed. In addition, a change in color can be provided by not lighting a part of the light emitting diodes. The blinking of the light emitting diode may be changed before and after each of the reels 3a to 3c is stopped. Finally, still another embodiment of the present invention will be described. The same members as those described above are denoted by the same reference numerals. In the above embodiment, the printing pattern of the light diffusion sheet 8 is a quadrangular pyramid that is a square in plan view as shown in FIG. However, as shown by reference numeral 8c in FIG. 4C, the protrusion 8a may be formed as a hexagonal pyramid whose lower edge is a tortoiseshell, and a regular two-dimensional pattern that can diffuse light two-dimensionally may be used. Can be adopted. In the above embodiment, the RGB light emitting diodes 31, 32 and 33 are arranged at the vertices of an equilateral triangle as shown in FIGS.
The light emitting diode group 30 composed of 33 was repeatedly arranged in the same direction in the horizontal direction. However, as shown in FIG. 6A, two light emitting diodes are shared between adjacent light emitting diode groups 30, and each of the RGB light emitting diodes is arranged such that triangles, preferably equilateral triangles, have an up-and-down alternating relationship. 31, 32, and 33 may be arranged. According to this configuration, the color mixture of the light source colors becomes more uniform than in the above-described embodiment, and the mounting area on the substrate 20 can be reduced. The RGB light emitting diodes 31, 32,
If the brightness of some of the light emitting diodes 33 is lower than that of the others, for example, as shown in FIG.
, Two G light emitting diodes 32, 32 may be used, and the other RB light emitting diodes 31, 33 may be used one by one. Further, in this case, the RGB light emitting diodes 31, 32, 33 in each light emitting diode group 30.
Should be arranged in a square. The respective characteristics of the light emitting diodes 31, 32 and 33 may be appropriately selected by referring to the characteristics of the chromaticity diagram so that the mixed color becomes white light by additive color mixing. Therefore, it is not always necessary to employ the RGB light emitting diodes 31, 32, 33. In the above embodiment, the present invention has been implemented for a slot machine. However, the backlight of the present invention may be used for a game machine such as a pachinko machine, a pinball game machine, and an arrange ball game machine, for example, and a similar configuration other than the game machine may be implemented. . For example, as shown in FIG. 7, when the present invention is implemented as a storefront / in-store sign, the upper surface of the backlight unit 7 is formed flat, and the light diffusion sheet 8, the mat sheet 9, and the display sheet 5 are also flat. What is necessary is just to form. Since the display sheet 5 is fixed by the bent portion 5x, these sheets 5, 8, 9 may be brought into contact with each other. In addition, the characters 6 and the sections 7a to 7c may be arranged in a line or in a lattice. As described above, according to the feature of the backlight of the display sheet according to the present invention, the light emitting diodes of a plurality of colors are turned on in combination to obtain white light by additive color mixture. Can be used efficiently. Also, by turning on some light emitting diodes,
It is now possible to obtain colored light. In particular, a light diffusing sheet that diffuses the light of the luminous body in at least a two-dimensional direction along the sheet is used, and the light diffusing sheet is arranged apart from the luminous body to thereby provide a light source color. It became possible to obtain white light by mixing more uniformly. It should be noted that the reference numerals in the claims are merely for convenience of comparison with the drawings, and the present invention is not limited to the configuration of the attached drawings by the description. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a reel unit. FIG. 2 is a longitudinal sectional view of a backlight unit. FIG. 3 is a plan view of a backlight unit. 4A is a partially enlarged plan view of a light diffusion sheet having a square pattern, FIG. 4B is a cross-sectional view taken along line AA of FIG.
(C) is a partial enlarged plan view of the light diffusion sheet in a hexagonal pattern. FIG. 5 is a plan view showing a state in which light of RGB light emitting diodes is diffused by a light diffusion sheet. FIGS. 6A and 6B show another embodiment relating to the arrangement of RGB light emitting diodes. FIG. 6A is a diagram showing a state where adjacent light emitting diodes share a light emitting diode, and FIG. . FIG. 7 is a diagram corresponding to FIG. 2 showing a backlight unit used for storefronts, in-store signs, and the like. [Description of Signs] 1: Reel unit, 2: Frame, 3a to c: Reel, 4: Reel drum, 5: Display sheet, 5x: Bending portion, 6: Text, etc., 7: Backlight unit, 7a:
Upper section, 7b: middle section, 7c: lower section, 8: light diffusion sheet, 8a: protrusion, 8b: apex, 8c: lower edge, 8x: bent section, 9: mat sheet, 9x: bent section, 1
0: case, 11: mounting part, 12: enclosure, 13: partition, 14: locking piece, 20: substrate,: 30 light emitting diode group, 31: R light emitting diode, 32: G light emitting diode, 33: B light emitting diode , 40: light emitting diode group image, 41: R light emitting diode image, 42: G light emitting diode image, 43: B light emitting diode image

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 2C088 BC25 DA09 EB78                 2H042 BA04 BA15 BA20                 5C095 AA21 BA40 BB01 BB12 CC01                       DA03 DA90 EE27                 5C096 AA11 AA23 BA01 BB03 BB09                       BC02 BC04 BC13 CA02 CA12                       CA13 CA14 CA28 CA32 CB01                       CC06 CC20 CC24 CC31 CF02                       CF07 DA01 DB10 DB18 DC02                       DC05 DC06 DC07 FA01 FA04                       FA09 FA13

Claims (1)

Claims 1. A character, graphic, or symbol (6) (hereinafter, referred to as "1") including a plurality of sections (7a to 7c) and a luminous body arranged in each section (7a to 7c). Character etc.) is the section (7
a display sheet (5) displayed corresponding to (a) to (7c) is illuminated from the back side of the display sheet (5a) with the luminous body for each of the sections (7a to 7c), so that the characters and the like (6) are transparently lit. A light, wherein each of the sections (7a-7)
c) light emitting diodes (31, 32, 33) of a plurality of colors which become white by additive color mixing,
A backlight for a display sheet, wherein a light diffusion sheet (8) and a mat sheet (9) are sequentially arranged between the light emitting diodes (31, 32, 33) and the display sheet (5).