JP2000056709A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a display device in any installation space in spite of whether it is outdoor or indoor by using a display panel constituted as a thin plate by coating the front side of a light emitting diode(LED) element with coating material having a translucent part and integrating a display base plate and many LED elements. SOLUTION: The display panel constituted as the thin plate by coating the front side of the LED element with the coating material having the translucent part and integrating the display base plate and many LED elements is used in this device. In the panel 11, the display base plate 16 having a matrix circuit 15 formed by printed wiring on its surface is disposed in a casing 14. Many LED elements 17 of plural colors are integrally attached in a lattice state at specified intervals on the circuit 15, the respective LED elements 17 are connected to the circuit 15. A porous plate 20 functioning as the coating member having many translucent parts 19 whose diameter is made larger and larger toward a separating direction from the surface of the base plate 16 is attached to the surface thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED element (light emitting diode element) using various information as character information and graphic information.
The present invention relates to a display device capable of displaying by using the display device.

[0002]

2. Description of the Related Art Conventionally, as a display device used for the above-mentioned applications, a display device 5 shown in FIG.
There is 0. As shown in the figure, a horizontally long rectangular LED mounting board 52 is disposed in a rectangular box-shaped casing 51.
A large number of LEDs (light emitting diodes) 53 are mounted on the surface of the LED mounting board 52. On the other hand, a control board 54 on which an IC chip 55 such as an LSI constituting a display controller for controlling the driving of the LED 53 is mounted on the back surface of the LED mounting board 52. In addition, a transparent surface plate 5 also serving as a decorative plate is provided in front of the LED mounting substrate 52.
6 are attached. With the above-described configuration, various information can be displayed on the front panel 56 as character information and graphic information by blinking the LED 53 based on the LED drive signal from the control board 54.

[0003]

However, the above-described display device 50 still has the following problems to be solved. That is, as shown in FIG.
Has not only the LED 53 mounted on its front surface, but also a control substrate 54 mounted on its back surface, and furthermore, a display device 5 for preventing the control substrate 54 from having heat.
0 must ensure a sufficiently large functional space.
Therefore, as shown in FIG. 7, the display device 50 is inevitably thick, and the installation space is limited to the outdoors or the like, and there is a problem in aesthetic appearance.

[0004] The present invention has been made in view of such circumstances, and provides a display device that can be easily installed in any installation space, whether outdoors or indoors, and that can improve the appearance. The purpose is to:

[0005]

According to the present invention, there is provided a semiconductor device comprising:
In the display device described above, a large number of LED elements are arranged at predetermined intervals on a display substrate, and the front side of each of the LED elements is covered with a cover member having a light transmitting portion, so that the display substrate and the large number of LED elements are covered. And a display panel in a thin plate shape. According to a second aspect of the present invention, in the display device of the first aspect, a matrix circuit for supplying a signal to each of the plurality of LED elements is formed on the display substrate.

According to a third aspect of the present invention, in the display device according to the first or second aspect, a reflective material is provided around the light transmitting portion, and the LED element is attached to the light transmitting portion. Light is directed forward.
According to a fourth aspect of the present invention, in the display apparatus according to the third aspect, the reflective material has a trumpet shape in which the LED element is arranged on a base portion and the diameter is gradually increased. The display device according to claim 5 is the display device according to claims 1-4.
5. The display device according to claim 1, wherein the display substrate is provided with a connection terminal, and a computer is provided inside the display substrate via the connection terminal to send a character and / or graphic signal to the display panel. Connected to the vessel.

A display device according to a sixth aspect is the display device according to any one of the first to fifth aspects, wherein the thickness of the main body of the display panel is 2 to 5 m.
m. Here, the main body thickness is set in the range of 2 to 5 mm because if it is less than 2 mm, there is a problem in strength, while if it exceeds 5 mm, it is not possible to effectively reduce the thickness of the display. The display device according to claim 7 is the display device according to any one of claims 1 to 6, wherein each of the LED elements is:
One LED element is composed of a multi-color LED element capable of displaying a plurality of colors.

According to an eighth aspect of the present invention, in the display device according to any one of the first to seventh aspects, the brightness of each of the LED elements can be changed by chopper control. The display device according to claim 9 is the display device according to any one of claims 1 to 8, wherein the limiting resistor connected in series to the LED element is built in a main body of the LED element. .
The display device according to claim 10 is the display device according to claim 3 or 4.
In the display device described above, a front side of the reflective material is coated with a transparent resin.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. First, an overall configuration of a display device 10 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG.
0 is a thin display panel 1 having a thickness of 2 to 5 mm.
1 and a display controller 1 with a computer inside
2 are electrically connected by a signal line 13. The display panel 11 is configured separately from the display controller 12, and
Is divided into two blocks A to F, and each block A
~ F each, 256 (= 16 horizontal x 16 vertical)
) Are mounted.

In the above-described configuration, the display panel 11 will be described in more detail with reference to FIGS. 2 and 3. In a rectangular box-shaped casing 14, a matrix circuit 15 formed on the surface by printed wiring or the like is provided.
Is provided. As shown in FIGS. 1 to 3, a large number of multicolor LED elements 17 are integrally mounted on the matrix circuit 15 at predetermined intervals in a lattice pattern. Are respectively electrically connected to the matrix circuit 15, and can emit three colors (yellow, green, and red) based on the light emitting diode drive signal from the matrix circuit 15.

As shown in FIG. 5, the matrix circuit 15 is formed by forming a plurality of conductors 15a forming the cathode side and a plurality of conductors 15b forming the anode side in a lattice. In each lattice space, a conductor 15c is disposed between the conductors 15a and 15b, and the conductor 15c has a single-color LED element 17a to 17c that emits yellow, green, and red when energized, and a limiting resistor 18 respectively.
a to 18c are attached in series. Note that the limiting resistors 18a to 18c are built in the monochromatic LED elements 17a to 17c, respectively. Then, the single-color LED elements 17a-
A multi-color LED element 17 is constituted by 17c, and as shown in FIG.
Six (= 16 horizontal × 16 vertical) are attached.

As shown in FIGS. 2 and 3, the surface of the display substrate 16 is provided as a cover member having a large number of light-transmitting portions 19 whose diameter gradually increases in a direction away from the surface. A plate 20 is mounted. Also, on the surface of the perforated plate 20, which is the front side of the multicolor LED element 17,
A surface plate 21 made of acrylic resin or the like is attached. Then, the display substrate 1 communicating with the bottom of each translucent portion 19
A multicolor LED element 17 is mounted on the surface of the LED. In addition, a light reflecting surface is formed on the tapered peripheral wall 22 of the light transmitting portion 19, so that light emitted from the multicolor LED element 17 can be directed forward.

In this embodiment, the light reflecting surface is made of resin (A
The tapered peripheral wall 22 of the through hole 19 provided on the perforated plate 20 made of, for example, BS resin) is formed by coating with a reflective material 23 having a glossy metal film such as aluminum and gradually increasing in diameter. are doing. However, the light reflecting surface can also be formed by forming the perforated plate 20 itself from stainless steel or the like and polishing the tapered peripheral wall 22 to a smooth surface.

As described above, in the present embodiment, only the multicolor LED elements 17 forming the main body of the LED are mounted on the front surface of the display substrate 16 instead of the LED. Since the display panel control section and the like are not mounted on the display panel 11, the entire thickness of the display panel 11 can be made as thin as possible (specifically, 3 to 4 mm). Further, the tapered peripheral wall 2 of the light transmitting portion 19
Since the light reflecting surface is formed on the multicolor LED element 1, even when the small multicolor LED element 17 is used as shown in FIG.
The light radiated from 7 is reflected on the light reflecting surface and enlarged, whereby the luminance can be increased and the enlarged character information and the like can be displayed on the surface plate 21.

As shown in FIG. 4, the front side of the reflective material 23 is coated with a transparent resin 24a instead of the through-hole portion 19 and the surface plate 21 which form the front side of the reflective material 23. 24 can also be formed.

Next, the structure of the display controller 12 will be described with reference to FIGS. 1, 5 and 6. The display controller 12 which is separate from the display panel 11 will be described.
Has an I / O interface 26, an arithmetic unit (CPU) 27, a RAM 28, first and second ROMs 29 and 30, and the like inside a casing 25. Here, a program for performing overall control of the display device 10 is stored in the first ROM 29. On the other hand, a program for causing the multicolor LED elements 17 to emit light in a predetermined order is stored in the second ROM 30, and a plurality of ROM cards are prepared and mounted on the arithmetic unit 27 according to the use, so that the The corresponding light emission order program can be easily executed. The I / O interface 26 includes a matrix circuit 15 on the display substrate 16 of the display panel 11 and connection terminals 13a at both ends.
13b are electrically connected via a signal line 13 having the same.

Next, the operation of the display device 10 having the above configuration will be described with reference to FIGS. When an arbitrary operation switch on an operation panel (not shown) is pressed, a drive signal (character and / or graphic signal) is output from the arithmetic unit 27 based on the program called from the second ROM 30, and the drive signal is displayed on the display panel. 1
1 is transmitted to each multi-color LED element 17 via the matrix circuit 15 on the light emitting element 1 to cause the multi-color LED element 17 to emit light in a predetermined mode, and to display predetermined information on the surface plate 21 as character information or graphic information. can do. As a specific mode, left and right scroll display, stop motion display, flash display, moving image display, resolve display, and the like are performed over the entire block A to F or each block A to
This can be performed for each F.

At this time, as described above, in the present embodiment, the display panel 11 is formed in a thin plate shape.
It can be easily installed in any installation space, that is, indoors as well as outdoors, and the appearance can be improved. Further, even when a small multicolor LED element 17 is used, the light radiated from the multicolor LED element 17 is reflected on the light reflecting surface and enlarged, so that the enlarged character information or the like is displayed on the surface plate 21. Since it can appear, the aesthetic effect can be increased while maintaining the display panel 11 in a compact structure. When the display controller 12 controls the multicolor LED elements 17 by chopper control, the luminance can be adjusted, and the aesthetic effect can be further increased.

As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. It also includes other embodiments and modifications that can be considered within the scope of the matters described. For example, multi-color LED
Instead of the element 17, a single-color LED element can be used.

[0020]

In the display device according to the present invention, a large number of LED elements are arranged on the display substrate at predetermined intervals, and the front side of each LED element is covered with a cover member having a light transmitting portion. By using a thin-panel display panel that integrates a display substrate and a large number of LED elements, it can be easily installed in any installation space, outdoors or indoors, and open up new markets. And aesthetics can be improved. In particular, when the display device is installed indoors, the size of the display device is reduced, so that mass production can be easily performed and manufacturing cost can be reduced.

In the display device according to the second aspect of the present invention, by forming a matrix circuit for supplying a signal to each of a large number of LED elements on the display substrate, the number of connecting wires can be significantly reduced, and the display device is inexpensive. Can be manufactured. In the display device according to the third aspect, since a reflective material is provided around the light-transmitting portion to direct the light of the LED element attached to the light-transmitting portion forward, the light radiated from the LED element is provided. By reflecting and enlarging, the enlarged character information and the like can be exposed on the surface plate, so that the aesthetic effect can be increased while maintaining the display panel in a compact structure, and the luminance can be increased. Can also be increased.

In the display device according to the fourth aspect, since the reflective material is formed in a trumpet shape in which the LED element is disposed at the base and the diameter is gradually increased, the reflection efficiency can be increased, and the above-described aesthetic effect and luminance can be obtained. Can enhance the effect. In the display device according to the fifth aspect, a connection terminal is provided on the display substrate, and the connection terminal is connected to a display controller that includes a computer inside and sends a character and / or graphic signal to the display panel via the connection terminal. Therefore, the display panel can be configured separately from the display controller, and the thinning of the display panel can be promoted from this aspect as well.

In the display device according to the sixth aspect, by setting the thickness of the main body of the display panel in the range of 2 to 5 mm, the thickness of the display panel can be reduced while securing a certain strength. In the display device according to the seventh aspect, the LED element has a multicolor L
It is composed of ED elements, and the multi-color LED elements are each composed of a single-color LED element capable of displaying a plurality of colors.
The display effect of the display panel can be further enhanced. In the display device according to the eighth aspect, since the brightness of each LED element can be changed by chopper control, the display effect of the display panel can be further enhanced.

In the display device according to the ninth aspect, the limiting resistor connected in series to the LED element may be an LED.
Since the display panel is built in the main body of the element, the thickness of the display panel can be reduced from this aspect. Claim 1
In the display device described in No. 0, the front side of the reflective material is coated with a transparent resin, so that the thickness of the display panel can be reduced from this aspect as well.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a conceptual configuration of a display device according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the display panel.

FIG. 3 is a partial plan sectional view of the display panel.

FIG. 4 is a partial cross-sectional view of a display panel in a display device according to a modification of one embodiment of the present invention.

FIG. 5 is an explanatory diagram of a configuration of a matrix circuit of the display device according to the embodiment of the present invention.

FIG. 6 is a block diagram of the display controller.

FIG. 7 is a cross-sectional view of a conventional display device.

[Explanation of symbols]

A block B block C block D block E block F block 10 display device 11 display panel 12 display controller 13 signal line 13a connection terminal 13b connection terminal 14 casing 15 matrix circuit 15a lead 15b lead 15c lead 16 display substrate 17 multicolor LED element 17a Single color L
ED element 17b Monochromatic LED element 17c Monochromatic L
ED element 18a Limiting resistor 18b Limiting resistor 18c Limiting resistor 19 Through hole 20 Perforated plate 21 Surface plate 22 Tapered peripheral wall 23 Reflective material 24 Display panel 24a Resin 25 Casing 26 I / O interface 27 Arithmetic unit 28 RAM 29 First ROM 30 Second R
OM

Claims (10)

[Claims] A plurality of LED elements arranged at predetermined intervals on a display substrate, and a front side of each of the LED elements is covered with a cover member having a light-transmitting portion; A display device comprising: a display panel having a thin plate shape by integrating the above. 2. The display device according to claim 1, wherein a matrix circuit for supplying a signal to each of the plurality of LED elements is formed on the display substrate. 3. The display device according to claim 1, wherein a reflective material is provided around the light-transmitting portion, and the light from the LED element attached to the light-transmitting portion is directed forward. . 4. The reflective material is in the form of a trumpet whose diameter is gradually increased by disposing the LED element on a base.
A display device as described in the above. 5. The display substrate according to claim 1, further comprising a connection terminal connected to a display controller for transmitting a character and / or graphic signal to the display panel having a computer therein through the connection terminal. Item 5. The display device according to any one of Items 1 to 4. 6. The main body of the display panel has a thickness of:
The display device according to claim 1, wherein the display device is in a range of 2 to 5 mm. 7. Each of the LED elements has one LE.
The display device according to claim 1, wherein the D element is a multicolor LED element capable of displaying a plurality of colors. 8. The display device according to claim 1, wherein the brightness of each of the LED elements is changeable by chopper control. 9. The display device according to claim 1, wherein the limiting resistor connected in series to the LED element is built in a main body of the LED element. 10. The display device according to claim 3, wherein a front side of the reflection material is coated with a transparent resin.