CN110322785B - Display device and display device - Google Patents
Display device and display device Download PDFInfo
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- CN110322785B CN110322785B CN201910112660.1A CN201910112660A CN110322785B CN 110322785 B CN110322785 B CN 110322785B CN 201910112660 A CN201910112660 A CN 201910112660A CN 110322785 B CN110322785 B CN 110322785B
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- guide plate
- light guide
- pattern
- light emitting
- light
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- 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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0018—Redirecting means on the surface of the light guide
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- 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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F9/00—Details other than those peculiar to special kinds or types of apparatus
- G07F9/02—Devices for alarm or indication, e.g. when empty; Advertising arrangements in coin-freed apparatus
- G07F9/023—Arrangements for display, data presentation or advertising
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
Abstract
The invention provides a display device and a display device, wherein the display device can properly set a light emitting element for illuminating a pattern according to the pattern to be displayed. The display device includes: a light guide plate capable of displaying a pattern; and a lighting device to which the light guide plate is attached. The lighting device comprises: a plurality of light emitting elements arranged to face an incident surface of the light guide plate in a state where the light guide plate is mounted; at least one switch, which is turned on or off by installing the light guide plate; and a control unit that sets a light emitting element or a lighting pattern to be lit based on a combination of switches that are turned on in at least one of the switches, wherein the light guide plate is formed such that the plurality of prisms turn on the combination of switches corresponding to the pattern in a state where the light guide plate is attached to the lighting device such that the incident surface faces the plurality of light emitting elements.
Description
Technical Field
The present invention relates to a display device that displays a pattern using a light guide plate and a display device having such a display device.
Background
In the vending machine, the operated goods are sometimes replaced. When the product is replaced, it is preferable that the amount of money of the product, the advertisement corresponding to the product, and the like are also changed in accordance with the replacement. On the other hand, if a liquid crystal display capable of displaying arbitrary information is mounted on the vending machine, the cost of the vending machine itself increases. Therefore, an amount display device is proposed, which includes: a 1 st display unit including a light guide plate having a 1 st emission pattern formed on one surface thereof and a light emitting element that emits light forward from the 1 st emission pattern to perform display by receiving light from a reflection surface of the light guide plate; and a 2 nd display unit which is disposed on the rear surface side of the light guide plate and displays light based on the 2 nd emission pattern through the light guide plate, wherein the 1 st and 2 nd display units are configured such that, when viewed from the front, a region in which the 1 st emission pattern is formed overlaps a region in which the 2 nd emission pattern is formed (for example, see patent document 1).
Further, a display device is proposed, which includes a light emitting section having: a light guide plate disposed on a front surface of a price display unit that displays a selling price of a commodity; a warm color LED element and a cold color LED element for emitting light to the rear end surface of the extension of the light guide plate; and a reflection unit that reflects at least a part of the light passing through the light guide plate and emits the light to the outside from the front surface of the light guide plate (see, for example, patent document 2).
Prior art documents
Patent document 1: japanese patent laid-open publication No. 2017-182205
Patent document 2: japanese laid-open patent publication No. 2015-36949
In the above-described technique, an operator sets a light emitting element that is actually turned on among a plurality of light emitting elements such as LED elements. Therefore, when the operator erroneously sets the light emitting element to be lit, an unintended pattern may be displayed or information on the product may be displayed in an unintended color.
Therefore, an object of the present invention is to provide a display device capable of appropriately setting a light emitting element for illuminating a pattern to be displayed, in accordance with the pattern.
Disclosure of Invention
One embodiment of the present invention provides a display device. The display device has: a light guide plate formed of a transparent member in a plate shape, having one side surface formed as a 1 st incident surface, and capable of displaying a 1 st pattern; and a lighting device to which the light guide plate is attached. The lighting device comprises: a plurality of light emitting elements arranged to face an arbitrary side surface of the light guide plate in a state where the light guide plate is mounted; at least one switch, which is turned on or off by installing the light guide plate; and a control unit that sets a light emitting element to be lit out of the plurality of light emitting elements or sets a lighting pattern indicating a temporal change in a lighting state regarding the light emitting element to be lit out, based on a combination of switches that are turned on, in at least one switch, the light guide plate having a plurality of prisms arranged along a 1 st pattern on one surface of the light guide plate, the plurality of prisms reflecting light emitted from the light emitting element to be lit out of the plurality of light emitting elements and incident into the light guide plate from the 1 st incident surface to be emitted from the other surface of the light guide plate in a state where the light guide plate is attached to the lighting device such that the 1 st incident surface faces the plurality of light emitting elements, and being formed to turn on the combination of switches corresponding to the 1 st pattern out of the at least one switch.
With the above configuration, the display device can appropriately set the light emitting element for illuminating the pattern according to the pattern to be displayed.
In the display device, it is preferable that each of the at least one switch is a switch that switches between on and off according to whether or not the switch is pressed, and the at least one switch is disposed so as to face the 1 st incident surface of the light guide plate in a state where the light guide plate is attached to the lighting device so that the 1 st incident surface faces the plurality of light emitting elements, and the 1 st incident surface of the light guide plate has a shape that turns on a combination of switches corresponding to the 1 st pattern among the at least one switch.
In this way, in the display device, the light emitting elements for illuminating the pattern to be displayed can be appropriately set simply by attaching the light guide plate to the illumination device.
In the display device, it is preferable that the other side surface of the light guide plate is formed as a 2 nd incident surface, the light guide plate is capable of displaying a 2 nd pattern, and the light guide plate is formed so that a combination of switches corresponding to the 2 nd pattern among the at least one switch is turned on in a state where the light guide plate is attached to the lighting device so that the 2 nd incident surface faces the plurality of light emitting elements.
In this way, the display device can display different patterns by changing the direction in which the light guide plate is attached to the illumination device, and can appropriately set the light emitting element that illuminates each pattern to be displayed.
Preferably, the display device further includes a 2 nd illumination device, the light guide plate is attached to the 2 nd illumination device, a side surface of the light guide plate facing the 1 st incident surface is a 2 nd incident surface, and the light guide plate is capable of displaying a 2 nd pattern, and the 2 nd illumination device includes: a plurality of light emitting elements arranged to face the 2 nd incident surface in a state where the light guide plate is mounted; at least one switch, which is turned on or off by installing the light guide plate; and a control section that sets a light emitting element to be lit or a lighting pattern related to the light emitting element to be lit among the plurality of light emitting elements according to a combination of switches that are turned on among the at least one switch, the light guide plate having a plurality of prisms and being formed so as to turn on a combination of switches corresponding to the 2 nd pattern among the at least one switch included in the 2 nd illumination device, wherein the plurality of prisms are arranged along a 2 nd pattern on one surface of the light guide plate, and in a state where the light guide plate is mounted on the 2 nd illumination device such that the 2 nd incident surface faces the plurality of light emitting elements included in the 2 nd illumination device, the plurality of prisms reflect light emitted from a light-emitting element that is turned on among the plurality of light-emitting elements included in the 2 nd illumination device and incident into the light guide plate from the 2 nd incident surface, and emit the light from the other surface of the light guide plate.
Thus, the display device can simultaneously display two patterns, and can appropriately set a light emitting element that illuminates each pattern to be displayed.
In this case, it is preferable that the light guide plate has a curved portion between the 1 st incident surface and the 2 nd incident surface, the curved portion being curved so as to protrude toward the other surface side, the 1 st pattern-forming prisms be provided at positions closer to the 1 st incident surface side than a center of the curved portion in the curved portion, and the 2 nd pattern-forming prisms be provided at positions closer to the 2 nd incident surface side than the center of the curved portion in the curved portion.
Thus, the display device can make patterns which can be seen visually different according to the direction of observing the light guide plate.
As another aspect of the present invention, a display device is provided. The display device has: a placement unit on which a display object is placed; and a display device disposed on a front surface of the display object, the display device including: a light guide plate which is formed in a plate shape by a transparent member and has one side surface formed as a 1 st incident surface, is disposed so that one surface faces an object to be displayed, and is capable of displaying a 1 st pattern; and a lighting device to which the light guide plate is attached, the lighting device including: a plurality of light emitting elements arranged to face an arbitrary side surface of the light guide plate in a state where the light guide plate is mounted; at least one switch, which is turned on or off by installing the light guide plate; and a control unit that sets a light emitting element to be lit out of the plurality of light emitting elements or sets a lighting pattern indicating a temporal change in a lighting state regarding the light emitting element to be lit out, based on a combination of switches that are turned on, in at least one switch, wherein the light guide plate has a plurality of prisms arranged along a 1 st pattern on one surface of the light guide plate, and is formed so as to turn on a combination of switches corresponding to the 1 st pattern in the at least one switch, and wherein the plurality of prisms reflect light emitted from the light emitting element to be lit out of the plurality of light emitting elements and incident into the light guide plate from the 1 st incident surface and exit from the other surface of the light guide plate in a state where the light guide plate is attached to the lighting device such that the 1 st incident surface faces the plurality of light emitting elements.
With the above configuration, the display device can appropriately set the light source for illuminating the pattern according to the display target object and the pattern to be displayed.
Drawings
Fig. 1 is a schematic perspective view of a vending machine to which a display device according to an embodiment of the present invention is attached.
Fig. 2 is a schematic perspective view of the display device.
Fig. 3 is a sectional view of the lighting device in a state where the light guide plate is attached to the lighting device.
Fig. 4 (a) is a diagram showing an example of the reference table. (b) Each of (a) to (d) is a diagram showing an example of a relationship between the shape of the incident surface and a combination of light emitting elements to be lit.
Fig. 5 is a partially enlarged view of a part of the light guide plate as viewed from the front.
Fig. 6 is a schematic side sectional view of the light guide plate along the line indicated by the arrow AA' in fig. 5.
Fig. 7 is a diagram showing an example of a positional relationship between a position of a pattern formed on a light guide plate and a light emitting element to be lit, according to a modification.
Fig. 8 is a diagram showing an example of a reference table according to a modification.
Fig. 9 is a view showing another example of a pattern formed on a light guide plate according to a modification.
Fig. 10 is a diagram showing an example of a reference table according to another modification.
Fig. 11 (a) and (b) are schematic front views of a light guide plate according to another modification.
Fig. 12 (a) is a schematic perspective view of a display device according to still another modification, and (b) is a schematic front view of the display device according to still another modification.
Description of the reference symbols
100: a vending machine;
110: a housing;
111: a commodity display shelf;
112: a selection button;
113: a currency input port;
114: a commodity outlet;
115: a change return port;
121. 121 a: a display device;
131: a sample of the commodity;
11: a light guide plate;
11a, 11 d: an incident surface;
11 b: a scattering surface;
11 c: an emitting surface;
11 e: a bending section;
12. 12-1, 12-2: an illumination device;
13: a housing;
13 a: an insertion opening;
14-1 to 14-n: a light emitting element;
15-1 to 15-m: a tactile switch;
16: a control unit;
21. 21-1, 21-2: a pattern;
22: a prism;
22 a: a reflective surface.
Detailed Description
Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings. The display device is formed in a plate shape, and has, on one surface, a light guide plate that reflects light propagating inside the display device toward an observer side and is provided with a plurality of prisms arranged along a pattern to be displayed (hereinafter, may be simply referred to as a display pattern), and an illumination device on which the light guide plate is mounted. The illumination device is provided with an insertion opening into which one end of the light guide plate on the incident surface side is inserted, and a plurality of light emitting elements arranged to face the incident surface of the light guide plate and a plurality of tactile switches (tact switches) arranged to face the incident surface of the light guide plate are provided in the insertion opening. The light guide plate is inserted into the insertion opening of the illumination device and is attached to the light guide plate, and one end of the light guide plate on the incident surface side is formed so that any one of the plurality of tactile switches is pressed in accordance with a display pattern formed on the light guide plate. Then, the illumination device sets a light emitting element to be lit among the plurality of light emitting elements and a lighting pattern indicating a temporal change in a lighting state, according to a combination of tactile switches pressed among the plurality of tactile switches. Thus, the display device can appropriately set the light emitting element for illuminating the pattern according to the pattern to be displayed.
In the following description, for convenience of explanation, the side facing the observer is referred to as a front side, and the opposite side is referred to as a rear side.
Fig. 1 is a schematic perspective view of a vending machine to which a display device according to an embodiment of the present invention is attached. The vending machine 100 is an example of a display device, and includes a casing 110 and a plurality of display devices 121, wherein the casing 110 includes three-layer product display shelves 111 provided in an upper half of a front surface, a plurality of selection buttons 112 provided on a lower side of each of the product display shelves 111, a money input port 113 provided in the front surface, a product output port 114 provided on a lower side of the front surface, and a change return port 115, and the plurality of display devices 121 are provided in the front surface of each of the product display shelves 111. The product display shelf 111 is an example of a placement unit for placing a display object. Further, the housing 110 of the vending machine 100 includes: a storage (not shown) for storing the same kind of products as the product samples 131 displayed on the product display shelves 111, a transport mechanism (not shown) for transporting the products from the storage to the product outlet 114, and a control circuit (not shown) for controlling the entire vending machine 100. The control circuit is connected to a sensor for recognizing money inserted from the money insertion port 113, and controls the transport mechanism so that if the amount of money inserted is equal to or greater than the amount of money of an article corresponding to a selection button pressed by an observer (in this example, a user of the vending machine 100) among the selection buttons 112, the article is transported from the storage to the article ejection port 114. When the amount of money to be inserted is larger than the amount of money of the product corresponding to the pressed selection button, the control circuit returns the difference between the amount of money to be inserted and the amount of the product to the change return port 115.
The plurality of display devices 121 can display a pattern on the front surface of the product sample 131 with respect to the product sample 131 placed on the product display shelf 111, and the pattern is used for advertising the product sample 131. Further, each display device 121 may display the same pattern or may display different patterns.
Fig. 2 is a schematic perspective view of the display device 121. Fig. 3 is a cross-sectional view of the lighting device in a state where the light guide plate is attached to the lighting device. Since the display devices 121 all have the same structure, one display device will be described below.
As shown in fig. 2 and 3, the display device 121 has a light guide plate 11 and an illumination device 12. Further, the lighting device 12 includes: a housing 13; a plurality of light emitting elements 14-1 to 14-n (wherein n is an integer of 2 or more); at least one tactile switch 15-1 ~ 15-m (wherein m is an integer of 1 or more, in the illustrated example, m ═ 3); and a control unit 16. The plurality of light emitting elements 14-1 to 14-n, at least one tactile switch 15-1 to 15-m, and the control unit 16 are mounted on a substrate (not shown) provided in the housing 13, for example. The light emitting elements and the tactile switches are connected to the control unit 16 via signal lines formed on the substrate.
The light guide plate 11 is a plate-shaped member that is transparent to light emitted from the plurality of light emitting elements 14-1 to 14-n. For example, the light guide plate 11 is formed by molding a resin transparent to visible light, such as polymethyl methacrylate (PMMA), polycarbonate, or cycloolefin polymer. In the present embodiment, the light guide plate 11 is disposed substantially parallel to the front surface of the housing 110 on the front surface side of the commodity sample 131 provided on the commodity display rack 111 in a state of being attached to the illumination device 12. As described above, the light guide plate 11 is provided with the pattern 21, and the pattern 21 can be displayed by lighting the corresponding light emitting element among the light emitting elements 14-1 to 14-n. That is, during lighting of a corresponding one of the light emitting elements 14-1 to 14-n, the light guide plate 11 propagates light from the lit light emitting element inside thereof and reflects the light toward an observer located on the front side by a plurality of prisms (to be described in detail later) formed on the back side and arranged in such a manner as to form the pattern 21, whereby the observer can visually recognize the pattern 21 that emits light. Further, since the light guide plate 11 is a transparent member, the pattern 21 is displayed so as to overlap the commodity sample 131 located on the rear surface side of the light guide plate 11 to the observer located on the front surface side of the vending machine 100.
In addition, the light guide plate 11 will be described in detail later.
The housing 13 of the illumination device 12 is formed in a rectangular parallelepiped shape, and an insertion opening 13a for mounting the light guide plate 11 is formed in one surface thereof. The light guide plate 11 is attached to the illumination device 12 by inserting one end of the light guide plate 11 on the incident surface 11a side into the innermost portion of the insertion port 13 a.
The light emitting elements 14-1 to 14-n are elements emitting visible light, and may be light emitting diodes, for example. In the present embodiment, in a state where the light guide plate 11 is attached to the lighting device 12, the light emitting elements are arranged in a line along the longitudinal direction of the incident surface 11a such that the light emitting surfaces of the light emitting elements face the incident surface 11a, which is one of the side walls of the light guide plate 11. The light emitted by each of the light-emitting elements 14-1 to 14-n may be white light, or may be light having a specific color such as red, blue, yellow, or the like. In the present embodiment, the light emitting elements 14-1 to 14-n are classified into a predetermined number of groups arranged adjacent to each other, and the light emitting elements included in the groups of the groups emit light of different colors from each other. For example, in fig. 3, the light emitting elements emitting white light, the light emitting elements emitting red light, the light emitting elements emitting yellow light, the light emitting elements emitting green light, and the light emitting elements emitting blue light are arranged in this order from the left. In addition, the arrangement of the respective light emitting elements is not limited to this example, and a plurality of light emitting elements which emit light of the same color may be arranged adjacent to each other.
The light emitting elements 14-1 to 14-n are turned on or off in response to a control signal from the control unit 16. While any one of the light emitting elements 14-1 to 14-n is turned on, the control unit 16 causes light emitted from the light emitting element to enter the light guide plate 11 through the entrance surface 11a, to propagate through the light guide plate 11, and then to be reflected by the plurality of prisms forming the pattern 21 provided on the scattering surface (extension surface) 11b on the back surface side of the light guide plate 11 and to be emitted from the emission surface 11c on the front surface side.
The tactile switches 15-1 to 15-m are disposed in the insertion opening 13a of the illumination device 12 so as to face the incident surface 11a of the light guide plate 11 in a state where the light guide plate 11 is attached to the illumination device 12. In the present embodiment, the tactile switches 15-1 to 15-m are arranged in a row along the longitudinal direction of the incident surface 11a around the light emitting elements 14-1 to 14-n. Then, in a state where the light guide plate 11 is attached to the illumination device 12, the tactile switch corresponding to the pattern formed on the light guide plate 11 is pressed and turned on by the incident surface 11a having the shape corresponding to the pattern among the tactile switches 15-1 to 15-m (on). Then, the turned-on tactile switch outputs a signal indicating that it is turned-on to the control section 16. For example, in the example shown in fig. 3, the tactile switches 15-1 and 15-2 are turned on by pressing the light incident surface 11a of the light guide plate 11. On the other hand, tactile switch 15-3 is not pressed but remains in an off state. Further, each tactile switch may be configured to: the switch is turned on when not pressed and turned off when pressed.
The control unit 16 has a processor and a nonvolatile semiconductor memory, and controls the lighting and extinguishing of the light emitting elements 14-1 to 14-n of the lighting device 12. In the present embodiment, the control unit 16 determines the light emitting elements to be lit and the lighting pattern based on the combination of the tactile switches that have been turned on among the light emitting elements 14-1 to 14-n.
Therefore, for example, a reference table indicating a combination of tactile switches to be turned on, a combination of light emitting elements to be lit, and a lighting pattern is stored in advance in the semiconductor memory of the control section 16. The control unit 16 refers to the reference table to determine the combination of light emitting elements and the lighting pattern corresponding to the combination of tactile switches to be turned on, which are indicated by the signals received from the respective tactile switches. Then, the control section 16 lights each light emitting element included in the specified combination of light emitting elements in accordance with the specified lighting pattern.
Fig. 4 (a) is a diagram showing an example of the reference table. The on/off of the tactile switch 15-1 (expressed as switch a for convenience) is shown with reference to the leftmost column in table 400. Similarly, the left column 2 of table 400 indicates the on/off of tactile switch 15-2 (for convenience, switch B), and the left column of table 400 indicates the on/off of tactile switch 15-3 (for convenience, switch C). Further, referring to the 2 nd column on the right of table 400, a combination of light emitting elements to be lit and a lighting pattern are shown. Also, the column referring to the right end of the table 400 indicates a pattern to be displayed provided on the light guide plate 11. In addition, the right-hand column may be omitted. As shown with reference to table 400, in this example, the light emitting element that is lit is set so that its light emission color differs depending on the combination of tactile switches that are pressed.
For example, as shown in fig. 4 (b), when pattern 21 is "cool to (つめた to い)", incident surface 11a of light guide plate 11 has a shape in which tactile switch 15-1 is on and tactile switches 15-2 and 15-3 are off. Therefore, in reference table 400, as shown in the 2 nd row, control unit 16 keeps the state in which the light emitting element that emits cold color light among light emitting elements 14-1 to 14-n is always turned on and the other light emitting elements are turned off. As shown in fig. 4 c, when pattern 21 is "replace soon article (もうすぐ alternative え)", incident surface 11a of light guide plate 11 has a shape in which tactile switch 15-1 is off and tactile switches 15-2 and 15-3 are on. Therefore, in reference table 400, as shown in the following column 2, control unit 16 keeps a state in which the light emitting element emitting green light among light emitting elements 14-1 to 14-n is turned on and the other light emitting elements are turned off. As shown in fig. 4 (d), when the pattern 21 is "new product (new product)", the incident surface 11a of the light guide plate 11 has a shape in which all the tactile switches are turned on. Therefore, in the reference table 400, the control unit 16 can always turn on all the light emitting elements 14-1 to 14-n as shown in the following.
The following describes the light guide plate 11 in detail.
Fig. 5 is a partially enlarged view of a part of the light guide plate 11 as viewed from the front. Fig. 6 is a schematic side sectional view of the light guide plate 11 along the line indicated by the arrow AA' in fig. 5. As shown in FIGS. 5 and 6, one side surface of the light guide plate 11 faces the light emitting elements 14-1 to 14-n and is formed as an incident surface 11a for allowing light emitted from the light emitting elements 14-1 to 14-n to enter the light guide plate 11.
In a state where the light guide plate 11 is attached to the illumination device 12, the incident surface 11a also faces each tactile switch. Therefore, as shown in fig. 4 (b) to 4 (d), in a state where the light guide plate 11 is attached to the illumination device 12, the incident surface 11a is formed so that the tactile switch corresponding to the pattern 21 formed on the light guide plate 11 among the tactile switches 15-1 to 15-m is pressed. The incident surface 11a is formed in a notched shape at a portion facing an unpressed tactile switch among the tactile switches 15-1 to 15-m. Therefore, when the light guide plate 11 is mounted on the illumination device 12, only the tactile switches corresponding to the pattern 21 among the tactile switches 15-1 to 15-m are pressed. Therefore, by merely mounting the light guide plate 11 to the illumination device 12, the illumination device 12 can light the light emitting elements corresponding to the pattern 21 formed on the light guide plate 11 among the light emitting elements 14-1 to 14-n in accordance with the lighting pattern corresponding to the pattern 21.
In addition, according to a modification, the incident surface 11a may be formed so that a portion facing a tactile switch pressed out of the tactile switches 15-1 to 15-m protrudes toward the tactile switch side than other portions of the incident surface 11 a. In this case, only the tactile switch corresponding to the pattern 21 among the tactile switches 15-1 to 15-m is pressed.
Light from the lit light emitting elements among the light emitting elements 14-1 to 14-n is incident into the light guide plate 11 from the incident surface 11 a. Then, the light from the lit light emitting element that has propagated inside the light guide plate 11 is totally reflected by the plurality of prisms 22 formed on the scattering surface 11b located on the back surface side of the light guide plate 11, and then emitted from the emission surface 11c located on the front surface side of the light guide plate 11 and facing the scattering surface 11 b. A plurality of prisms 22 are arranged along the pattern 21 to form the pattern 21. Therefore, the observer can visually recognize the pattern 21 visible by emitting light on the front surface of the light guide plate 11 while the light emitting elements corresponding to the pattern 21 are lit. In addition, in fig. 5 and 6, in order to improve the legibility of the drawings, it is to be noted that the size of each prism 22 and the thickness of the light guide plate 11 are exaggerated.
The plurality of prisms 22 are arranged randomly in the pattern 21 in a zigzag or lattice shape or in such a manner that the arrangement density of the prisms is constant in the pattern 21. In addition, when light and dark are provided in the pattern 21, the arrangement density of the prisms 22 may be adjusted for each position in the pattern 21 so that the arrangement density of the prisms 22 in brighter portions in the pattern 21 is increased.
Each of the plurality of prisms 22 is formed as a substantially triangular groove having a predetermined length on the scattering surface 11b, for example. The predetermined length is set to a length enough to arrange a plurality of prisms on the pattern 21, and is set to about several tens of μm to several hundreds of μm, for example. Each of the plurality of prisms 22 has a reflection surface 22a, and the reflection surface 22a forms a predetermined angle (hereinafter, an inclination angle) with respect to the scattering surface 11b, and totally reflects light from the corresponding light emitting element incident into the light guide plate 11 and emits the light from the emission surface 11 c.
The inclination angle α of the reflection surface 22a of each prism 22 forming the pattern 21 is set to, for example, 30 ° to 50 °, so that when the vending machine 100 is viewed from the front side of the vending machine 100 by an observer, the light reflected by each prism 22 is directed toward one of the observers.
Further, each of the plurality of prisms 22 is disposed such that the reflection surface 22a faces any one of the light emitting elements 14-1 to 14-n corresponding to the pattern 21 on a surface parallel to the scattering surface 11 b.
By disposing each of the plurality of prisms 22 in this manner, each prism 22 can reflect light from a corresponding one of the light-emitting elements 14-1 to 14-n out of the light incident from the incident surface 11a so as to direct the light toward the front surface of the light guide plate 11. On the other hand, even if light other than the corresponding light emitting element, for example, stray light, of the light incident from the incident surface 11a is reflected by the prism 22, the light is emitted from the emitting surface 11c at a large angle with respect to the emitting surface 11c, and therefore, it is difficult for an observer positioned on the front surface of the light guide plate 11 to observe the light. Therefore, the display device 121 can display the pattern 21 to the viewer only during the period when the corresponding light emitting element is lit.
As described above, in the display device, the incident surface of the light guide plate on which the pattern displayed on the light guide plate is formed has a shape in which the tactile switch corresponding to the pattern among the plurality of tactile switches included in the illumination device is pressed. Therefore, only by mounting the light guide plate to the illumination device, the tactile switch corresponding to the pattern formed on the light guide plate is pressed, and the illumination device turns on the light emitting element corresponding to the pressed tactile switch. Therefore, the display device can appropriately set the light emitting element for illuminating the pattern according to the pattern to be displayed.
In addition, according to the modification, only one of the combination of the light emitting elements to be lit and the lighting pattern may be set according to the shape of the incident surface of the light guide plate, that is, according to the combination of the tactile switches pressed, and the other may be set in advance regardless of the combination of the tactile switches pressed.
Alternatively, the position of the pattern formed on the light guide plate may be different depending on the pattern. In this case, the lighting device may light the light emitting elements at different positions according to the position of the pattern.
Fig. 7 is a diagram showing an example of the positional relationship between the position of the pattern formed on the light guide plate 11 and the light emitting element to be lit according to this modification. In this modification, the positions of the patterns 21 formed on the light guide plate 11 are provided at different positions in the longitudinal direction (horizontal direction in the drawing) of the incident surface 11a for each light guide plate 11. For example, as shown in the figure, in one light guide plate, the pattern 21 is formed in the vicinity of the center in the longitudinal direction of the incident surface 11 a. In this case, only the light-emitting elements included in the group 141 near the center among the light-emitting elements 14-1 to 14-n may be turned on. In the other light guide plate, the pattern 21 is formed on the left side of the center of the incident surface 11a in the longitudinal direction. In this case, only the light-emitting elements included in the group 142 located on the left side of the center among the light-emitting elements 14-1 to 14-n may be turned on. In this modification, the light emitting elements to be lit are also set in accordance with a combination of tactile switches pressed by the light guide plate 11 inserted in the illumination device 12.
Fig. 8 is a diagram showing an example of a reference table according to this modification. Reference table 800 is the same as reference table 400 shown in fig. 4 except that the right column indicates the position of the pattern and the combination of light-emitting elements to be lit. In the reference table 800, the right column may be omitted.
For example, when the pattern 21 is formed on the left side on the light guide plate 11, as shown in the 2 nd row on the reference table 800, the incident surface 11a of the light guide plate 11 is formed such that the tact switch 15-1 is turned on and the tact switches 15-2, 15-3 are turned off. Therefore, the control unit 16 keeps a state in which the light emitting elements that emit a predetermined number (5 in this example) of red light in order from the left among the light emitting elements 14-1 to 14-n are always turned on and the other light emitting elements are turned off. Further, when the pattern 21 is formed near the center and on the right side on the light guide plate 11, as shown in column 2 below with reference to table 800, the incident surface 11a of the light guide plate 11 is formed such that the tact switch 15-1 is turned off and the tact switches 15-2, 15-3 are turned on. Therefore, the control unit 16 keeps a state in which the light emitting elements that emit a predetermined number (9 in this example) of red light in order from the right among the light emitting elements 14-1 to 14-n are always turned on and the other light emitting elements are turned off. When the pattern 21 is formed on the entire surface of the light guide plate 11, the incident surface 11a of the light guide plate 11 is formed so that all the tactile switches are turned on, as shown in the lowermost column of the reference table 800. Therefore, the control unit 16 keeps a state in which all light emitting elements emitting red light among the light emitting elements 14-1 to 14-n are turned on all the time and the other light emitting elements are turned off.
The control unit 16 may control the light emitting elements so that the light emitting elements emitting light of different colors are turned on according to the positions of the patterns. For example, when the pattern 21 is formed on the left side of the light guide plate 11, the controller 16 may turn on the light emitting element that emits blue light and is provided at the same position as the pattern in the longitudinal direction of the incident surface 11a, while when the pattern 21 is formed on the right side of the light guide plate 11, the controller 16 may turn on the light emitting element that emits red light and is provided at the same position as the pattern in the longitudinal direction of the incident surface 11 a.
Further, according to another modification, the pattern 21 formed on the light guide plate 11 may also have a plurality of sub-patterns. The lighting pattern of each light-emitting element is then also controlled according to the combination of the tactile switches pressed to change the order in which the visible sub-patterns blink among the more sub-patterns.
Fig. 9 is a diagram showing another example of the pattern formed on the light guide plate 11 according to this modification. In this modification, the pattern 21 formed on the light guide plate 11 includes sub-patterns 211-1 to 211-s (s is an integer of 2 or more). In this case, as in the above-described embodiment, a plurality of prisms 22 arranged along the sub-pattern may be provided on the diffusion surface 11b of the light guide plate 11 for each sub-pattern. Further, for each sub-pattern, the prisms may be formed such that the reflection surfaces of the prisms arranged along the sub-pattern face the corresponding light emitting element among the light emitting elements 14-1 to 14-n. Therefore, the control unit 16 can sequentially display any one of the sub-patterns 211-1 to 211-s by sequentially changing the light emitting elements to be lit. Therefore, the display device 121 can perform presentation like animation.
Fig. 10 is a diagram showing an example of a reference table according to this modification. Reference table 1000 is the same as reference table 400 shown in fig. 4 except that the 2 nd column from the right end indicates the lighting pattern, the column at the right end indicates the content of the lighting pattern, and the lighting pattern indicates the lighting order of the light emitting elements. In the reference table 1000, the right column may be omitted.
In this example, as the lighting pattern, the order of the light emitting elements to be lit among the light emitting elements 14-1 to 14-n may be shown. For example, as the lighting pattern, the identification numbers of the respective light emitting elements may be shown in each order to be lit. Then, the control unit 16 may sequentially turn on the light emitting elements at regular intervals in this order. The lighting pattern may include a period during which each light emitting element is turned on. In this case, the control unit 16 may turn on each light emitting element only during a period indicated by the lighting pattern. The control unit 16 may repeatedly turn on the light emitting elements in accordance with a lighting pattern set in accordance with a combination of tactile switches pressed by the light guide plate 11 inserted into the illumination device 12.
In another modification, a plurality of patterns may be formed on one light guide plate. Further, the light guide plate may have different side surfaces for each pattern.
Fig. 11 (a) and 11 (b) are schematic front views of the light guide plate according to this modification. In this modification, two patterns 21-1, 21-2 are formed on the light guide plate 11. Two of the side surfaces of the light guide plate 11 are formed as incident surfaces 11a and 11d, respectively. As shown in FIG. 11 (a), when displaying a pattern 21-1, a light guide plate 11 is attached to a lighting device 12 so that an incident surface 11a faces light emitting elements 14-1 to 14-n and tactile switches 15-1 to 15-m. On the other hand, as shown in FIG. 11 (b), when the pattern 21-2 is displayed, the light guide plate 11 is attached to the illumination device 12 so that the incident surface 11d faces the light emitting elements 14-1 to 14-n and the tactile switches 15-1 to 15-m. Further, as in the above-described embodiment, incident surface 11a is formed such that the light emitting element to be lit and the tact switch corresponding to the lighting pattern are pressed so that the light emitting element corresponding to pattern 21-1 among light emitting elements 14-1 to 14-n is lit in accordance with the corresponding lighting pattern. For example, the incident surface 11a is formed such that the tactile switches 15-1 and the tactile switches 15-3 are pressed by the incident surface 11a in a state where the light guide plate 11 is attached to the illumination device 12 such that the incident surface 11a faces the tactile switches and the light emitting elements. Further, the incident surface 11d is formed such that, in a state where the light guide plate 11 is attached to the illumination device 12 such that the incident surface 11d faces each of the tactile switches and each of the light emitting elements, all the tactile switches are pressed by the incident surface 11 d.
In this modification, a plurality of prisms 22 arranged along the pattern may be formed on the scattering surface 11b of the light guide plate 11 for each of the patterns 21-1 and 21-2. Each prism arranged along pattern 21-1 is disposed such that its reflection surface faces incident surface 11 a. Thus, when the light guide plate 11 is attached to the illumination device 12 such that the incident surface 11a faces each tactile switch and each light emitting element, each prism arranged along the pattern 21-1 reflects light from the corresponding light emitting element toward the front surface side, and thus the pattern 21-1 is displayed.
Similarly, each prism arranged along the pattern 21-2 is disposed with its reflection surface facing the incident surface 11 d. Thus, when the light guide plate 11 is attached to the illumination device 12 such that the incident surface 11d faces each tactile switch and each light emitting element, each prism arranged along the pattern 21-2 reflects light from the corresponding light emitting element toward the front surface side, and thus the pattern 21-2 is displayed.
According to this modification, the display device can display different patterns by merely changing the direction of the light guide plate attached to the illumination device, and the light emitting elements to be lit can be appropriately set according to the pattern to be displayed. In this modification, the number of patterns to be displayed may be three or four. Further, for each pattern to be displayed, a different side surface of the light guide plate may be formed as an incident surface corresponding to the pattern.
In addition, according to another modification, the display device may include two illumination devices so as to face each other with the light guide plate interposed therebetween.
Fig. 12 (a) is a schematic perspective view of the display device according to the modification, and fig. 12 (b) is a schematic front view of the display device according to the modification. In this modification, the display device 121a includes the light guide plate 11 and the two lighting devices 12-1 and 12-2. The two illumination devices 12-1 and 12-2 may be configured in the same manner as the illumination device 12 in the above-described embodiment.
In this modification, two patterns 21-1, 21-2 are formed on the light guide plate 11. Two side surfaces of the light guide plate 11 facing each other are formed as incident surfaces 11a and 11d, respectively. Light guide plate 11 is attached to illumination device 12-1 such that incident surface 11a faces the light emitting elements and tactile switches of illumination device 12-1. Light guide plate 11 is attached to illumination device 12-2 such that incident surface 11d faces the light-emitting elements and tactile switches of illumination device 12-2.
Further, incident surface 11a is formed such that a combination of tactile switches that light the light emitting elements corresponding to pattern 21-1 among the respective tactile switches of illumination device 12-1 is pressed. Also, incident surface 11d is formed such that a combination of tactile switches that light the light emitting elements corresponding to pattern 21-2 among the tactile switches of illumination device 12-2 is pressed. Further, each prism arranged along the pattern 21-1 is disposed with its reflection surface facing the incident surface 11 a. Similarly, each prism arranged along the pattern 21-2 is disposed with its reflection surface facing the incident surface 11 d.
Therefore, light emitted from the light emitting element corresponding to the pattern 21-1 among the light emitting elements of the illumination device 12-1 enters the light guide plate 11 through the entrance surface 11a, and the entered light is reflected by the prisms arranged along the pattern 21-1 and is emitted from the emission surface 11c on the front surface side. Thus, the viewer can visually recognize the pattern 21-1. Similarly, light emitted from the light emitting element corresponding to the pattern 21-2 among the light emitting elements of the illumination device 12-2 enters the light guide plate 11 through the entrance surface 11d, and the entered light is reflected by the prisms arranged along the pattern 21-2 and emitted from the emission surface 11c on the front surface side. Thus, the viewer can also visually recognize the pattern 21-2.
In this modification, the light guide plate 11 is curved so as to protrude toward the front surface side between the incident surface 11a and the incident surface 11d, that is, so as to protrude toward the exit surface 11c side. In the curved portion 11e, the prisms forming the pattern 21-1 are provided on the incident surface 11a side (lower side in fig. 12 b) with respect to the center of the curved portion 11e, and the prisms forming the pattern 21-2 are provided on the incident surface 11d side (upper side in fig. 12 b) with respect to the center of the curved portion 11 e. Therefore, light incident into the light guide plate 11 from the incident surface 11a and reflected by each prism of the pattern 21-1 is emitted from the emission surface 11c of the light guide plate 11 from the front surface toward the lower side. This is because the light reflected by each prism of the formed pattern 21-1 and having a small angle with respect to the outgoing surface 11c of the light directed upward is totally reflected by the outgoing surface 11c without being emitted from the light guide plate 11. Similarly, light incident into the light guide plate 11 from the incident surface 11d and reflected by each prism having the pattern 21-2 is emitted from the emission surface 11c of the light guide plate 11 from the front surface upward. Therefore, according to this modification, the display device can change the visible pattern according to the direction in which the observer observes the light guide plate 11. Further, since the light guide plate 11 can be bent to some extent by bending the light guide plate 11, it is easy to attach the light guide plate 11 to each of the two lighting devices.
In the above-described embodiment or each modification, the lighting device may be provided with another switch for determining the pattern formed on the light guide plate by insertion of the light guide plate, instead of the tactile switch. For example, a photoelectric sensor may be used as such a switch. In this case, each of the photosensors may include, for example, a light source and a light receiving element provided so as to face each other with the light guide plate 11 interposed therebetween in a state where the light guide plate 11 is attached to the illumination device. Each photosensor outputs a signal to the control unit 16 indicating that it is turned off when the light receiving element can receive light from the corresponding light source, and outputs a signal to the control unit 16 indicating that it is turned on when the light receiving element cannot receive light from the corresponding light source.
In the light guide plate 11, in a state where the light guide plate 11 is attached to the lighting device, in order to prevent light from the light source to the photosensor to be turned on from reaching the light receiving element, a mask (mask) for shielding light from the light source of the photosensor is provided on at least one of the scattering surface 11b and the emission surface 11c, for example, at the position of the photosensor. Thus, as in the above-described embodiment, by mounting the light guide plate to the illumination device, the display device can appropriately set the light emitting elements that illuminate the pattern to be displayed, in accordance with the pattern to be displayed. In this example, the shape of the incident surface is made the same regardless of the pattern formed on the light guide plate, and instead, a mask may be provided only at a predetermined position, so that the light guide plate can be easily manufactured.
The display device of the above embodiment or the modification may be mounted on various display devices other than the vending machine.
Thus, those skilled in the art can make various modifications according to the embodiments within the scope of the present invention.
Claims (3)
1. A display device, having:
a light guide plate formed of a transparent member in a plate shape, having one side surface formed as a 1 st incident surface, and capable of displaying a 1 st pattern; and
a lighting device to which the light guide plate is mounted,
the lighting device has:
a plurality of light emitting elements arranged to face any side surface of the light guide plate in a state where the light guide plate is mounted;
at least one switch which is turned on or off by installing the light guide plate; and
a control section that sets a light emitting element to be lit among the plurality of light emitting elements or sets a lighting pattern indicating a temporal change in lighting state with respect to the light emitting element to be lit, according to a combination of switches that are turned on among the at least one switch,
the light guide plate includes a plurality of prisms arranged along the 1 st pattern on one surface of the light guide plate and configured to turn on a combination of switches corresponding to the 1 st pattern among the at least one switch, wherein the plurality of prisms reflect light emitted from a light emitting element that is turned on among the plurality of light emitting elements and incident into the light guide plate from the 1 st incident surface to be emitted from the other surface of the light guide plate in a state where the light guide plate is attached to the lighting device such that the 1 st incident surface faces the plurality of light emitting elements, and wherein the plurality of prisms are configured to turn on the combination of switches corresponding to the 1 st pattern among the at least one switch
The other side surface of the light guide plate is formed as a 2 nd incident surface, the light guide plate is capable of displaying a 2 nd pattern, and the light guide plate is formed to turn on a combination of switches corresponding to the 2 nd pattern among the at least one switch in a state where the light guide plate is mounted to the lighting device such that the 2 nd incident surface faces the plurality of light emitting elements.
2. The display device according to claim 1,
the at least one switch is a switch that switches between on and off depending on whether or not pressed, respectively, and is configured to: wherein the light guide plate is opposed to the 1 st incident surface of the light guide plate in a state where the light guide plate is attached to the lighting device such that the 1 st incident surface is opposed to the plurality of light emitting elements,
the 1 st incident surface of the light guide plate has a shape that turns on a combination of switches corresponding to the 1 st pattern among the at least one switch.
3. A display device, having:
a placement unit on which a display object is placed; and
a display device disposed on a front surface of the display object,
the display device has:
a light guide plate formed of a transparent member into a plate shape, one side surface of which is a 1 st incident surface, the light guide plate being disposed such that one surface thereof faces the display object and being capable of displaying a 1 st pattern; and
a lighting device to which the light guide plate is mounted,
the lighting device has:
a plurality of light emitting elements arranged to face any side surface of the light guide plate in a state where the light guide plate is mounted;
at least one switch which is turned on or off by installing the light guide plate; and
a control section that sets a light emitting element to be lit among the plurality of light emitting elements or sets a lighting pattern indicating a temporal change in lighting state with respect to the light emitting element to be lit, according to a combination of switches that are turned on among the at least one switch,
the light guide plate includes a plurality of prisms arranged along the 1 st pattern on the one surface of the light guide plate, and is formed to turn on a combination of switches corresponding to the 1 st pattern among the at least one switch, wherein the plurality of prisms reflect light emitted from a light emitting element that is turned on among the plurality of light emitting elements and incident into the light guide plate from the 1 st incident surface to be emitted from the other surface of the light guide plate in a state where the light guide plate is attached to the lighting device such that the 1 st incident surface faces the plurality of light emitting elements, and the plurality of prisms are configured to turn on the combination of switches corresponding to the 1 st pattern among the at least one switch
The other side surface of the light guide plate is formed as a 2 nd incident surface, the light guide plate is capable of displaying a 2 nd pattern, and the light guide plate is formed to turn on a combination of switches corresponding to the 2 nd pattern among the at least one switch in a state where the light guide plate is mounted to the lighting device such that the 2 nd incident surface faces the plurality of light emitting elements.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018068549A JP6866868B2 (en) | 2018-03-30 | 2018-03-30 | Display device and exhibition device |
| JP2018-068549 | 2018-03-30 |
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| CN110322785A CN110322785A (en) | 2019-10-11 |
| CN110322785B true CN110322785B (en) | 2021-12-31 |
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| CN201910112660.1A Active CN110322785B (en) | 2018-03-30 | 2019-02-13 | Display device and display device |
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| CN111123426A (en) * | 2020-01-22 | 2020-05-08 | 马鞍山晶智科技有限公司 | Transparent light source system for display device |
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Also Published As
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| CN110322785A (en) | 2019-10-11 |
| JP2019179677A (en) | 2019-10-17 |
| JP6866868B2 (en) | 2021-04-28 |
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