JP2004325530A - Display device of light emitting element combination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive display device which is a combination light transmission plates which can vary the main display of a segment display section by simplifying the structure. <P>SOLUTION: The light guide plate 18 composed of transparent resin or glass etc. is arranged in front of a segment display section 10. A plurality of light emitting elements 15 serving as a light source of the light guide plate 18 are arranged above and below the segment display sections 10. Both segment LED 13 and light guide plate LED 15 are arranged on a single and common substrate. The substrate 16 is a flat plate, on whose inner surface facing in parallel with the light guide plate 18 a segment constituting frame 14 for dividing the segment display section 10 into each segment 12 is fixed. Thus, the planner luminescence of the light guide plate 18 is superposed on the segment display. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light-emitting element type composite display device in which light emission showing a specific shape of a main display portion and light emission of a whole surface of a light guide plate are layered.
[0002]
[Prior art]
2. Description of the Related Art There is known a segment display device that selectively emits light from a plurality of segment display units and displays one number or the like as a whole. In the display device, a plurality of LED elements are mounted on a substrate such that one light emitting diode (LED) is arranged corresponding to each segment. It becomes something. On the other hand, a transparent light guide plate is further arranged opposite to the front side of such a segment display so as to overlap, and a side LED for entering light from the side of the light guide plate is added, and the light guide plate is given a predetermined light by the light of the LED. By emitting light in colors, the above-described segment light emission such as the number and the planar light emission of the light guide plate are layered, thereby giving a decorative change to a simple segment display.
[0003]
[Problems to be solved by the invention]
However, in this case, a substrate for mounting the plurality of LED elements of the segment display section and a side substrate for mounting the side LED elements for the light guide plate which are assembled at right angles to the substrate are required, and the structure is complicated. In addition, it is troublesome to assemble, and it is difficult to provide it at low cost.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device with a light guide plate capable of giving a change to a main display of a segment display unit with a simplified structure at a low cost.
[0005]
Means for Solving the Problems and Effects of the Invention
In order to solve the above-described problems, the present invention provides a main display unit that displays a specific shape by a plurality of light emitting elements, and a surface having transparency disposed in front of the main display unit and opposed to the main display unit. A light guide plate, and a light guide plate light emitting element serving as a light source for causing the light guide plate to emit light, the plurality of light emitting elements for the main display unit and the light guide plate light emitting element, the same The specific shape is displayed by arranging the plurality of light emitting elements for the main display section selectively on the substrate, and the light emitting element for the light guide plate emits light and the light is transmitted to the light guide element. The light guide plate is caused to emit light by being guided by the light plate, so that a light emitting display mode in which light emission showing a specific shape of the main display portion and light emission of the entire surface of the light guide plate are layered is provided on the front side of the light guide plate. It is characterized by being visible from That.
[0006]
As described above, since the light emitting element in the main display unit and the light emitting element for the light guide plate are arranged on the same (common) substrate while having a composite structure with the light guide plate, a side substrate is unnecessary. Since the structure is simple and the light-emitting elements need only be mounted on the same substrate in common, the assembly is easy and the composite display device can be obtained at low cost.
[0007]
Further, in the present invention, the light-emitting element for the light guide plate is located on the outside of the substrate, and the plurality of light-emitting elements for the main display portion are arranged inside the substrate, so that the end of the light guide plate approaches the substrate side. An extension is formed on the substrate, and a light emitting element for the light guide plate is arranged on the substrate corresponding to an end of the extension, and light of the light emitting element is guided to the light guide plate via the extension. ing.
[0008]
As described above, since the extended portions are formed so that both ends of the light guide plate are located outside the main display portion so as to be close to the light emitting device serving as the light source, the light emitting device for the light guide plate can emit light for the main display portion. Even when mounted on the same substrate as the element, the light of the light emitting element for the light guide plate is guided from its extension to the light guide plate, and the light emission showing the specific shape of the main display portion and the overall planar shape of the light guide plate are provided. Light emission and display can be superposed.
[0009]
In the present invention, the main display section may be a so-called dot matrix type display section (image display is also possible) in addition to a segment display section in which a plurality of light emitting areas (each segment) are combined in a predetermined form in advance. .
[0010]
When a segment display method is assumed, the present invention provides a method in which a plurality of light emitting elements corresponding to a plurality of segments of the segment display unit and the light emitting element for the light guide plate are arranged in the same direction on the same common substrate. And the light-emitting elements for the light guide plate are located at opposite ends (ends on both sides) of the common substrate, respectively, while the plurality of light-emitting elements of the segment display unit are arranged on the common light guide plate. An extension is formed such that both ends of the light guide plate located on the common substrate inside the light emitting element for use and facing the common substrate approach both ends of the common substrate. The end of each extension and each light emitting element for the light guide plate are in a positional relationship corresponding to each other, and a plurality of light emitting elements for the segment display section are selected by the composite structure of the segment display section and the light guide plate. The specific shape is displayed by the combination of the segments by light emission, and the light emitting element for the light guide plate emits light, and the light is guided from the extensions on both sides of the light guide plate to cause the light guide plate to emit light. Thereby, a light emitting display form in which light emission showing a specific shape of the segment display portion and light emission of the entire surface of the light guide plate are layered is visually recognized from the front side of the light guide plate. When the light emission for the light guide plate overlaps the light emission of a specific shape (usually a number or the like) of the segment display section, the light emission spreading to the periphery is added to the specific segment display, and the decorative effect is enhanced.
[0011]
Further, according to the present invention, the light guide plate integrally includes a main body of the flat light guide plate facing the common substrate, and an extension extending from an end of the light guide plate main body to approach the common substrate. The extension has a shape having an arcuate curved portion which is smoothly connected to the light guide plate main body in a curved shape.
[0012]
Since the light guide plate has a shape having such an arcuate curved portion, the light emission output taken into the light guide plate proceeds by bending the light taken into the light guide plate along the arcuate curve portion by the curved portion. It can be guided to a flat main body while changing the direction. Therefore, light generated in the light emitting element is efficiently guided to the light guide plate, and can be overlaid on light emission of the main display portion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a light emitting element type composite display device (hereinafter, simply referred to as a composite display device) of the present invention will be described with reference to the accompanying drawings.
[0014]
First, FIG. 1 is a front view of the composite display device of the present invention as viewed from the upper surface thereof (the upper portion of the connection cover is cut off). In this figure, there is a segment display section 10 as a main display section, and this segment display section 10 is composed of seven fragmentary display segments 12 combined in an eight-letter shape, and can display ten types of numbers 0-9. It is to be. Each of the display segments 12 is provided with a light emitting element 13 one by one, and these light emitting elements 13 are formed of light emitting diodes, which are hereinafter referred to as segment light emitting elements or segment LEDs.
[0015]
A light guide plate 18 (FIGS. 2 to 4) is arranged in front of the segment display section 10, and the light guide plate 18 is made of a transparent resin (eg, acrylic resin) or glass. On both sides (upper and lower) of the segment display section 10, a plurality of light emitting elements 15 (the light emitting elements are constituted by light emitting diodes, hereinafter referred to as light guide plate light emitting elements or light guide plate LEDs) are arranged as light sources of the light guide plate 18. Have been. Both the segment LED 13 and the light guide plate LED 15 are mounted on one common substrate 16. The substrate 16 has a flat plate shape, and a segment forming frame 14 (hereinafter, referred to as a reflector) that divides each display segment 12 into its space is fixed to an inner surface of the substrate 16 facing the light guide plate 18 in parallel. The reflector 14 is made of, for example, a resin having a hollow inside, and the side surface corresponding to each display segment 12 functions as a reflection surface.
[0016]
On the bottom surface of each display segment 12 formed between the reflectors 14, a segment LED 13 is mounted on a substrate 16. The light guide plate LED 15 is mounted on the same substrate 16 outside the reflector 14 in the same direction as the segment LEDs 15 (the optical axes of both LEDs are parallel).
[0017]
The light guide plate 18 includes a main body 20 facing the substrate 16 in parallel, and extension portions 21 protruding toward the substrate 16 at both ends. Each extension 21 extends to the substrate 16 side so as to intersect with the main body 20 of the light guide plate 18, in particular, at a substantially right angle. (Perpendicular to the optical axis of the light guide plate LED 15).
[0018]
As described above, the light guide plate 18 has a form in which a flat plate is bent at a right angle at both ends. As shown in FIGS. 1 and 2, the extension 21 of the light guide plate 18 extends linearly in the vertical direction of the segment display unit 10. The plurality of light guide plates 15 described above are arranged in a straight line at predetermined intervals along the longitudinal direction of the distal end surface 23 of the extension 21. The light guide plate LED 15 and the distal end surface 23 of the extension 21 are very close to or in contact with each other.
[0019]
The light emitted from the light guide plate LED 15 enters the extension portion 21 from the distal end surface 23, and is further changed in direction by approximately 90 degrees to be guided to the main body portion 20 of the light guide plate 18. An arcuate curved portion 22 is formed at a connection portion between the extension portion 21 and the main body portion 20 in the light guide plate 18, and light entering the extension portion 21 is bent (reflected) along the curved portion 22. The light is guided to the above-described main body 20 while changing the traveling direction, and the flat main body 20 emits planar light.
[0020]
FIG. 5 shows a positional relationship between the above-described distal end surface 23 and the light guide plate LED 15. The light guide plate LED 15 and the distal end face 23 of the extension 21 are formed along a plane substantially parallel to the substrate 16, and the plurality of light guide plate LEDs 15 are opposed to the plane very close to each other. Further, since the optical axis of the light guide plate LED 15 and the front end surface 23 thereof are orthogonal to each other and the front end surface 23 is very close to the light guide plate LED 15, the light emission of the light guide plate LED 15 is an extension of the light guide plate 18. Is efficiently captured. In addition, as shown in FIG. 6, a cut or a depression is provided in a portion facing the plurality of light guide plates LED 15 on the distal end surface 23 of the extension portion 21 of the light guide plate 18, and the light guide plate LED 15 is attached to the extension portion 21. It may be housed closely.
[0021]
Returning to FIG. 2, the relationship between the light guide plate 18, the common substrate 16, the connection cover 24, and the like will be described. The light guide plate 18 covers the end face (the top of the segment frame) of the reflector 14 to form a shallow fit. The light guide plate 18 is formed with a concave portion 26 (see also FIG. 4) that fits shallowly with the reflector 14. Further, a connection cover 24 is provided so as to cover the outside of the extension 21. The connection cover 24 is formed of an opaque resin, and prevents the light guided from the light guide plate LED 15 from leaking to the side. The connection cover 24 is provided on the outer surface corresponding to the extension 21 of the light guide plate 18, and has a curved portion that particularly engages with the arc-shaped curved portion 22 from the outside so that the light guide plate 18 is pressed against the substrate 16. Then, the light guide plate 18 is connected to the substrate 16 to integrate them. An elastically deformable engaging claw 25 is formed at the tip of the connection cover 24, and is forcibly engaged with the outer edge side of the substrate 16, whereby the segment display section 10 (segment LED 13) and the light guide plate LED 15 are integrally loaded. The substrate 16 and the light guide plate 18 are integrated.
[0022]
A plate holding portion 27 for fixing and holding the protection plate 19 is formed at an end of the connection cover 24 opposite to the locking claw 25. The protection plate 19 is in close contact with the flat main body 20 of the light guide plate 18 to protect the surface of the light guide plate 18, and its outer edge is fitted into the plate holding portion 27 and fixed to the connection cover 24. . The protective plate 19 is made of, for example, a transparent resin harder than or similar to the light guide plate 18, such as polycarbonate, in order to prevent the surface of the light guide plate 18 from being scratched.
[0023]
On the back surface (the surface on the substrate 16 side) of the light guide plate 18 (body portion 20), a scattering surface 28 such as minute unevenness is formed in order to scatter light emitted from the light guide plate 18 in a planar shape. The planar light emission by the light guide plate 18 is radiated at a wider angle. For example, as shown in FIG. 7, the scattering surface 28 is made into a scattering surface 28 having fine irregularities by causing fine particles such as shots to collide over substantially the entire back surface of the light guide plate 18. As shown in FIG. 8, the light guided from the light guide plate LED 15 is diffused by the scattering surface 28 formed on the back surface of the light guide plate 18 as shown in FIG. , And the light guide plate 18 emits a more uniform planar light. The light from the segment LED 13 becomes scattered light 13 a by the scattering action of the scattering surface 28 (in synergy with the reflection action of the reflector 14), and is projected forward through the light guide plate 18. This makes it appear that each segment emits more uniformly and globally.
[0024]
Note that the scattering surface 28 can be provided on the surface of the light guide plate 18. However, when the scattering surface 28 is formed on the back surface of the light guide plate 18, the shape of the entire segment due to light emission of the segment LED 13 can be more clearly defined (outer edge). More sharply).
[0025]
FIG. 10 shows a circuit for energizing the segment LED 13 (seven in this example) and the light guide plate LED 15 (six in each case on each side of the light guide plate 18) of the composite display device 11, and FIG. The common terminals P1 and P9 of the voltage application and the energizing terminals P2 to P8 to the seven segment LEDs 13 and the energizing terminals P10 to P15 to the twelve segment LEDs 15 for convenience are shown. The light guide plate LEDs 15 arranged on both sides of the light guide plate 18 in a fixed number (six in this example) serve as common connection terminals on both sides.
[0026]
The connection terminals (connection pins) P9 to P15 (7 poles) and the connection terminals (connection pins) P1 to P8 (8 poles) are mounted in two rows in a linear arrangement in parallel with each other along both ends of the substrate 16. ing. As shown in FIG. 10, the electrical connection between each connection pin and each of the light emitting elements 13 and 15 is connected to the anodes of all the light emitting elements 13 and 15 so that the + pin power supply can be commonly supplied to the connection pins P1 and P9. The cathodes of the segment LEDs 13 corresponding to the seven display segments 13 are connected to the connection pins P2 to P8, respectively, and connected to the output terminals of the display control unit 29. The connection pins P10 to P15 are connected to the cathodes of the light guide plate LEDs 15 (two corresponding ones on both sides of the light guide plate 18 are connected in series in pairs), and similarly the output terminals of the display control unit 29 are connected. It is led to.
[0027]
In the connection configuration shown in FIG. 11, by selectively applying a voltage to the plurality (seven) of the segment LEDs 13 from the display control unit 29, for example, a predetermined number is segment-displayed as a specific shape. That is, as is well known, only the segment emitted by the segment LED 13 emits light, and this light emission form is radiated to the outside via the light guide plate 18. For example, if the individual segment LEDs 13 are red, numbers and the like are displayed in red. When a voltage is simultaneously applied from the display control unit 29, light emitted from the light guide plate LED 15 is guided to the light guide plate 18 from the extension portions 21 on both sides of the light guide plate 18, and the main body 20 is exposed to the surface. By emitting light in a shape, the light is superimposed on the above-described numbers and the like in the segment display, and light is irradiated in a superimposed manner over a wider surface.
[0028]
If the segment LED 13 is, for example, a red system, the light guide plate LED 15 is also made to be a similar or similar system of the red system, and a planar light emission form around the clear segment display in the background, for example, around a red numerical display, A lighter red background or peripheral illumination is displayed. In this case, in FIG. 11, of the group of the light guide plate LEDs 15 (P10 to P15), for example, the current is supplied to the connection terminals P10 to P15 while being slightly shifted in time, or the power is supplied sequentially in sequence in accordance with the terminals P15 to P10. By causing the display controller to perform a time difference energization (light emission) such as stopping, the light emission form of the light guide plate 18 is changed over time in the arrangement direction of the light guide plate LEDs 15 (for example, a light emission display such as a neon sign is performed). Then, the corresponding planar light can be overlaid on the segment light emission).
[0029]
In the above description, it is assumed that all the light guide plate LEDs 15 are of the same color. However, by changing the color of the LED on one side and that on the other side of the light guide plate LED 15, a group of different LEDs for each color can be selectively selected. By switching and causing the current to emit light, the setting of the color of the planar light emission of the light guide plate 18 can be changed, or the color can be changed over time (for example, change between the same type of different colors, switching, and the like). Further, the change of the emission color and the change over time may be performed in an inclined or stepwise manner.
[0030]
Further, the light guide plate LED 15 is a mixed color of RGB (three primary colors) that generates various colors, each of the RGB LEDs (each of a predetermined number) emits light, and a composite arrangement of LEDs that emit light. Are selectively emitted, so that the planar light emission of various colors can be generated by the light guide plate 18.
[0031]
Also in the segment LED 13, the LED of each segment may have a different emission color. Further, the present invention is not limited to the segment, but may be a so-called dot matrix type main display unit instead of which the surface light emission by the light guide plate 18 may be superimposed.
[Brief description of the drawings]
FIG. 1 is a front view of one embodiment of a light emitting element type composite display device according to the present invention.
FIG. 2 is a side sectional view thereof.
FIG. 3 is a front view showing an example of a light guide plate.
FIG. 4 is a sectional view of the light guide plate.
FIG. 5 is a diagram showing an arrangement relationship between a light guide plate LED and an end of an extended portion of the light guide plate.
FIG. 6 is a diagram showing a modification of FIG. 5;
FIG. 7 is a rear view showing the range of the scattering surface formed on the light guide plate.
FIG. 8 is a diagram illustrating the operation of the scattering surface of the light guide plate.
FIG. 9 is a diagram showing an example of an arrangement of terminals on a substrate.
FIG. 10 is a diagram showing a connection example of light emitting diodes corresponding to FIG. 9;
FIG. 11 is a circuit diagram showing an example of an electrical connection mode including the composite display device of the present invention.
[Explanation of symbols]
10 segment display (main display)
11 Composite Display 12 Display Segment 13 Segment Light Emitting Element (Segment LED, Segment Light Emitting Element)
14 Reflector 15 Light guide plate light emitting device (light guide plate LED, light guide plate light emitting device)
DESCRIPTION OF SYMBOLS 16 Substrate 17 Connection pin 18 Light guide plate 19 Protective plate 20 Body part 21 of a light guide plate Extension part 22 of a light guide plate Arc-shaped curved part 23 of a light guide plate 23 End surface 24 of an extension part Plate holding unit 28 Scattering surface 29 Display control unit

Claims (10)

A main display section for displaying a specific shape by a plurality of light emitting elements, a transparent light guide plate having transparency disposed in front of the main display section and facing the main display section, and emitting light from the light guide plate A light-emitting element for a light guide plate serving as a light source for causing
The plurality of light-emitting elements for the main display unit and the light-emitting elements for the light guide plate are arranged on the same substrate, and the plurality of light-emitting elements for the main display unit selectively emit light, so that the identification is performed. Is displayed, and the light emitting element for the light guide plate emits light, and the light is guided to the light guide plate to cause the light guide plate to emit light. A light-emitting-element-type composite display device, wherein a light-emitting display form in which light emission is superimposed on the entire surface of the light plate is viewed from the front side of the light guide plate. A light emitting element for a light guide plate is located on the outside of the substrate, and a plurality of sending elements for the main display unit are arranged inside the substrate, and an extension is formed such that an end of the light guide plate approaches the substrate side. The light emitting element for the light guide plate is arranged on the substrate corresponding to the end of the extension, and the light of the light emitting element is guided to the light guide plate via the extension, and the light guide plate is planarized. The light-emitting element type composite display device according to claim 1, which emits light. A segment display section as a main display section that is arranged corresponding to each of the plurality of segments and selectively displays a specific shape such as a number by selectively emitting light from the plurality of segments, and a front side of the segment display section. A planar light guide plate having transparency disposed to face the segment display unit, and a light emitting element for a light guide plate serving as a light source for emitting light from the light guide plate,
A plurality of light emitting elements corresponding to a plurality of segments of the segment display unit and the light emitting element for the light guide plate are arranged in the same direction on the same common substrate, and the light emitting element for the light guide plate is The plurality of light emitting elements of the segment display unit are located on the common substrate inside the light emitting elements for the light guide plate, respectively. An extension is formed such that both ends of the light guide plate facing the substrate approach toward both ends of the common substrate, and the end of each extension corresponds to each light emitting element for the light guide plate. When the plurality of light emitting elements for the segment display section selectively emit light, a specific shape is displayed by a combination of segments, and the light emitting element for the light guide plate emits light. Light is guided from the extensions on both sides of the light guide plate to cause the light guide plate to emit light, so that light emission showing a specific shape of the segment display unit and light emission of the entire surface of the light guide plate are layered. A light-emitting element type composite display device, wherein a light-emitting display form is visually recognized from the front side of the light guide plate. The light guide plate integrally includes a flat light guide plate body facing the common substrate, and an extension extending from an end of the light guide plate body to approach the common substrate. Has an arcuate curved portion that smoothly connects to the light guide plate main body in a curved manner, and the light of the light emitting element for the light guide plate is flat while changing its direction within the arcuate curved portion in the extension thereof. The light-emitting element type composite display device according to claim 2, wherein the light-emitting device is guided by the light guide plate main body, and the light guide plate main body emits light in a planar shape. The light guide plate is formed so that the extension portion approaches the common substrate from both end portions facing each other, and connects the extension portion and both end portions of the common substrate from outside the extension portion. The light-emitting element type composite display device according to any one of claims 2 to 4, further comprising a connection cover that integrates the light-emitting element and the common substrate. The light emitting element that emits light from the main display unit and the light emitting element that emits light from the light guide plate are both light emitting diodes (LEDs). These LED elements are mounted on the common substrate in the same direction, respectively. 6. A lead portion for energizing the group of LED elements for the main display portion and a conducting portion for energizing the group of LED elements for the light guide plate are formed on the front surface or the back surface of the device. 14. A light-emitting element type composite display device according to item 13. A pattern in which only the main display unit emits light by switching energization to the group of light emitting elements that emit light in the main display unit and the group of light emitting elements that emit light in the light guide plate, and both the main display unit and the light guide plate The light-emitting element type composite display device according to any one of claims 1 to 6, wherein light-emitting display of at least two patterns including a pattern in which light is emitted in a multilayer manner is possible. 4. The light emitting element type composite display device according to claim 3, wherein the light source side end face of the light guide plate is close to the light emitting element of the light emitting source, and the end face is perpendicular to the light emitting axis. A plurality of light emitting elements having different emission colors are used for the light emitting element for the light guide plate serving as a light source for causing the light guide plate to emit light, and light is emitted from the light guide plate by controlling a combination of energization of the plurality of light emitting elements. The light-emitting element type composite display device according to any one of claims 1 to 8, wherein the emitted light color can be changed. The light emitting element type composite display device according to any one of claims 1 to 9, wherein a scattering surface for scattering light is formed on a back surface or a front surface of the light guide plate or separately from the light guide plate.

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