JP2000276069A - Display device and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] To provide a display device capable of easily modifying an existing display device equipped with a filament lamp and reducing the number of accidental light source burnouts. SOLUTION: An LED display 9 has a main body case 11 provided with a plurality of display windows on a front surface side, a printed board 12 provided with a plurality of LED chips, and a rubber terminal connected to the terminal support. A printed circuit board 13 on which the bodies 18 and 19 are provided, and a lead pin 14 for electrically connecting the printed circuits 12 and 13 are provided.
The printed circuit boards 12 and 13 are integrated while electrically connected by the lead pins 14. As a result, after the existing outer cover, indicator and filament lamp are removed from the terminal stand of the device, the LED indicator 9 is attached to the terminal stand, and the rubber terminal members 18 and 19 are attached.
The existing display device can be modified by connecting the lead wire to the terminal support pin 7 and attaching the outer cover again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a display device suitable for use as an indicator of an apparatus such as an elevator and a method of manufacturing the display device.

[0002]

2. Description of the Related Art Conventionally, in a display device of an elevator, a small incandescent bulb (filament lamp) is provided for each of seven segments (display openings) arranged in the shape of a star.
Are arranged, and the incandescent bulbs are individually lit to display numbers and symbols indicating the elevator car position, that is, the number of floors.

FIG. 15 is an exploded perspective view showing a conventional display device of this type. This display device has a plurality of detachable and attachable terminal mounts 1 of a device to which lamp power is applied from a control panel (not shown). 7-segment display 2 and outer cover 3 provided with 7 display openings (segments) 3a on the surface
And a diffusion sheet 4 provided on the inner bottom of the outer cover 3. The 7-segment display 2 is
It is composed of a filament lamp 5 such as seven incandescent lamps, and a lamp suede 6 in which the filament lamp 5 is detachably housed. The terminal support 1 has a connection terminal support pin 7 erected thereon, and the outer cover 3 is fixed to the lamp suede 6 by a fixing screw 8.

[0004]

By the way, in the above-mentioned conventional display device, when the life of the filament type lamp 5, for example, the incandescent bulb is 5,000 to 6000 hours in the continuous lighting state, the bulb is cut off, and the floor of the elevator is cut off. When the number is displayed, there is a segment that is always continuously lit, and there is a problem that the incandescent bulb of the segment is very easily cut. In other words, in the case of displaying the number of floors of an elevator using an incandescent bulb with a short life,
When an accidental incandescent ball break occurs, the display device cannot display the number of floors correctly, and the elevator user may be confused or the customer may be in a claim of the ball-break accident. Therefore, the maintenance worker replaces the incandescent balls of all the segments in addition to the incandescent balls of some of the segments in which the ball has been cut out, and replaces the incandescent balls of the elevator car and the landing display devices of the other floors. In order to prevent the recurrence of the burnout accident, incandescent bulbs on all floors are replaced, and there has been a problem that a large amount of time has been spent on replacing these incandescent bulbs.

The present invention has been made in view of such a situation in the prior art. A first object of the present invention is to make it possible to easily remodel an existing display device provided with a filament lamp and to prevent the light source from being burned out. Another object of the present invention is to provide a display device capable of reducing the number of pixels.

It is a second object of the present invention to provide a display device capable of uniformly illuminating a diffusion sheet with light emitted from an LED chip.

Another object of the present invention is to provide a display device capable of efficiently emitting light from an LED chip.

A fourth object of the present invention is to provide a display device in which light emitted from an LED chip can be transmitted through a resin film and can reach every corner of a display window.

A fifth object of the present invention is to provide a display device capable of preventing deformation of a main body case, a first printed board, and a second printed board.

A sixth object of the present invention is to provide a display device that can easily attach a rubber terminal body to a second printed circuit board.

A seventh object of the present invention is to provide a display device in which a lead wire is attached to a rubber terminal body and the lead wire can be used for energization without any trouble.

It is an eighth object of the present invention to provide a display device capable of preventing a wrong mounting direction of a rubber terminal on a second printed circuit board.

A ninth object of the present invention is to provide a display device capable of producing a stable LED chip with less color unevenness.

[0014] A tenth object of the present invention is to provide a display device that can use an LED chip with any of an AC power supply and a DC power supply.

The eleventh and twelfth objects are as follows. When the display electronic member is installed in reverse with respect to the terminal cradle of the device,
It is an object of the present invention to provide a display device for notifying the user.

A thirteenth object is to provide a display device which enables the first printed circuit board and the second printed circuit board to be smoothly mounted on the main body case.

A fourteenth object of the present invention is to provide a display device capable of reusing an existing outer cover.

A fifteenth object of the present invention is to provide a method of manufacturing a display device capable of obtaining a display electronic member suitable for use in the above display device.

[0019]

In order to achieve the first object, the invention according to claim 1 of the present invention provides a display electronic member detachable from a terminal cradle of an apparatus, and a display electronic member provided on a front side. A plurality of display openings are provided, and an outer cover in which the display electronic member is detachably stored, and a display device having a diffusion sheet provided on the inner bottom of the outer cover, wherein the display electronic member includes: A body case having a plurality of display windows on the front side and an open back side, a first printed circuit board on which at least a plurality of LED chips are provided, at least a plurality of current control resistors, and the device A second terminal provided with a rubber terminal body connected to the
A printed circuit board, and the first printed circuit board and the second printed circuit board.
A lead pin for electrically connecting the printed circuit board is provided, and the first printed circuit board and the second printed circuit board are integrated into the main body case in a state where they are electrically connected by the lead pin. It is.

In the invention according to claim 1 of the present invention, the existing outer cover, the lamp suede of the 7-segment display and the filament type lamp are detached from the terminal cradle of the equipment, respectively. A new display electronic member is attached to the terminal receiving stand, and the outer cover is attached again. As a result, the existing display device having the filament lamp can be easily modified. Further, since the light source is an LED chip, it is possible to reduce the accident of the light source being out of the ball.

According to a second aspect of the present invention, in order to achieve the second object, in the first aspect of the present invention, each of the plurality of LED chips is connected to each of the plurality of display windows. Are arranged at equal intervals on the first printed circuit board in a state where they face each other.

In the invention according to claim 2 of the present invention, light is uniformly emitted from the plurality of LED chips arranged at equal intervals on the first printed circuit board. The light emitted from the LED chip can uniformly illuminate the diffusion sheet.

In order to achieve the third object, the invention according to claim 3 of the present invention is directed to the invention according to claim 1 or 2, wherein the display window of the main body case is provided with the L port.
An inclined surface for reflecting light emitted from the ED chip to the outside of the main body case is provided.

According to the third aspect of the present invention, the light from the LED chip is reflected to the outside of the main body case by the inclined surface provided in the display window of the main body case. It can emit light well.

In order to achieve the fourth object, the invention according to claim 4 of the present invention is directed to the invention according to claims 1 to 3, wherein the entire periphery of the display window and the display window are opposed to each other. A structure in which a coating made of a transparent silicone resin or an epoxy resin is applied to the entire surface portion of the first printed circuit board, and the film on the entire peripheral portion of the display window is thicker than the film on the surface portion of the first printed circuit board. It is.

In the fourth aspect of the present invention, the distance between the surface of the transparent silicone resin or the epoxy resin and the display window is reduced.
Light emitted from the LED chip can be transmitted through the resin coating to reach every corner of the display window.

In order to achieve the fifth object, the invention according to claim 5 of the present invention is characterized in that, in the invention according to claims 1 to 4, the main body case is formed of a low warp synthetic resin. In addition, the thickness of each of the first printed board and the second printed board is set to a predetermined size for suppressing the warpage of each board.

In the invention according to claim 5 of the present invention, the main body case, the first printed circuit board, and the second
Since the warpage of the printed circuit board can be suppressed, these deformations can be prevented.

Further, in order to achieve the sixth and seventh objects, the invention according to claim 6 of the present invention relates to the invention according to claims 1 to 5, wherein the rubber terminal body has flexibility and flexibility. It is made of a heat-resistant silicone resin.

In the invention according to claim 6 of the present invention, the rubber terminal body has flexibility and can be deformed when mounted on the second printed circuit board. The rubber terminal body can be easily attached. Further, in a state where the lead wire is attached to the rubber terminal body, even if the lead wire generates heat by energization, the rubber terminal body has heat resistance, so that the deterioration of the rubber terminal body can be prevented, and Can be used for energization without any trouble.

In order to attain the sixth and eighth objects, the invention according to claim 7 of the present invention is directed to the invention according to claims 1 to 6, wherein the rubber terminal body is formed in an elliptical cylindrical shape. The rubber terminal body is formed with two insertion holes that can be inserted into two terminal receiving pins provided on a terminal receiving base of the device, and the two insertion holes The inner diameter of one of them is set larger than the outer diameter of the terminal receiving pin.

In the invention according to claim 7 of the present invention, the rubber terminal body is made elliptic cylindrical and has a direction, so that the operator can easily confirm the mounting direction of the rubber terminal body, It is possible to suppress a mistake in the direction in which the rubber terminal body is attached to the second printed circuit board. In addition, 2 formed on the rubber terminal body
Since the inner diameter of one of the insertion holes is larger than the outer diameter of the terminal receiving pin, a relatively small force is required to attach and detach the terminal receiving pin to and from the two insertion holes. It can be easily attached to the second printed circuit board.

In order to achieve the eighth object, the invention according to claim 8 of the present invention relates to the invention according to claims 1 to 7, wherein the second printed circuit board is provided at an end of the rubber terminal body. Is provided with a brim portion that engages with the rim.

In the invention according to claim 8 of the present invention, the rubber terminal body is pulled out of the second printed circuit board by engaging the flange at the end of the rubber terminal body with the second printed circuit board. Since it is possible to prevent the rubber terminal body from coming out, the rubber terminal body can be securely attached to the second printed circuit board.

In order to achieve the ninth object, the invention according to claim 9 of the present invention is characterized in that, in the invention according to claims 1 to 8, the LED chip emits light of a predetermined single color. It has a configuration.

According to the ninth aspect of the present invention, the LED chip emits light of a single color, so that a stable LED chip with less color unevenness can be manufactured.

In order to achieve the tenth object,
A tenth aspect of the present invention is the invention according to the first to ninth aspects, wherein a plurality of LED chips disposed opposite to the display window of the main body case are connected in series, and these LED chips are connected to each other. And a diode chip for full-wave rectification for rectifying the supplied current.

According to the tenth aspect of the present invention having the above-described configuration, in the case of a DC power supply, the LED chip is operated by the DC current supplied from the DC power supply, and
In the case of an AC power supply, an AC current supplied from the AC power supply is rectified into a DC current by a diode chip for full-wave rectification, and the LED chip is operated with the DC current. As a result, both the AC power supply and the DC power supply
D chips can be used.

In order to achieve the eleventh and twelfth objects, the first printed circuit board and the second printed circuit board are integrated into the main body case in a state where they are electrically connected by the lead pins. In addition, when the display electronic member is installed upside down on the terminal cradle of the device, only a specific LED chip among the plurality of LED chips is displayed as a mounting reverse error display. Lighting configuration.

In order to achieve the thirteenth object,
An outer dimension of the second printed board is set to be larger than an outer dimension of the first printed board, and a first stepped portion at which an end of the first printed board abuts on an inner wall in the main body case; (2) A second step portion with which the end of the printed board contacts is provided.

Further, in order to achieve the fourteenth object, the existing display electronic member and the existing diffusion sheet can be replaced with a new display electronic member and a new diffusion sheet, respectively, and the new display electronic member can be replaced with a new display electronic member. A main body case provided with a plurality of display windows on the front side and an open back side, a first printed circuit board provided with at least a plurality of LED chips, at least a plurality of current control resistors, A main body case including a second printed board provided with a rubber terminal body connected to a terminal support of the device, and a lead pin for electrically connecting the first printed board and the second printed board; Inside, the first printed circuit board and the second printed circuit board are configured to be integrated while being electrically connected by the lead pins.

In order to achieve the fifteenth object,
According to a fifteenth aspect of the present invention, there is provided a display electronic member detachable with respect to a terminal cradle of a device, and a plurality of display openings provided on a front surface side, and the display electronic member is detachable. In a method of manufacturing a display device having an outer cover to be stored and a diffusion sheet provided on the inner bottom of the outer cover,
When manufacturing the display electronic member, the device having a plurality of insertion holes of the same shape is formed by flowing a silicone resin into two sets of rubber terminal body molds having different shapes of insertion holes and solidifying and molding the same. A first rubber terminal body connected to the terminal receiver of the first type and a second rubber terminal body having a plurality of insertion holes of different shapes and connected to the terminal receiver of the device.
A step of forming a terminal portion by attaching a lead wire to the rubber terminal body after completion of the first step, a plurality of LED chips, a diode chip for full-wave rectification, and a plurality of lead pins. A third step of assembling a first printed circuit board provided with a plurality of current limiting resistors;
A fourth step of assembling the second printed circuit board provided with the first rubber terminal body and the second rubber terminal body, and a plurality of lead pin fitting holes, and after the first to fourth steps,
The assembled first printed circuit board is housed in a main body case provided with a plurality of display windows on the front side, and the first printed circuit board is fixed to a first step formed on an inner wall of the main body case with an adhesive. Then, the assembled second printed circuit board is housed in the main body case, and the second printed circuit board is fitted with the lead pins of the first printed circuit board in the fitting holes for lead pins of the second printed circuit board. A fifth step of fixing the board to a second step formed on the inner wall of the main body case with an adhesive, and after the fifth step, fitting the lead pins of the first printed board to the lead pins of the second printed board. A sixth step in which the first printed circuit board and the second printed circuit board are electrically connected by soldering to the mating holes; All peripheral portion of the window, and the entire surface portion of the first printed circuit board facing the display window,
A seventh step of applying a coating made of a transparent silicone resin or an epoxy resin, and after completion of these first to seventh steps,
And an eighth step of attaching a diffusion sheet to the surface of the main body case.

According to the fifteenth aspect of the present invention, the first printed board and the second printed board are stored in the main body case of the display electronic member.
Since these substrates can be integrated while being electrically connected by lead pins, a display electronic member suitable for use in the above-described display device can be obtained. The display electronic member can be easily mounted on the table as it is.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an LED display provided in a display device according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the LED display of FIG. 1, and FIG. FIG. 4 is a view of the LED display of FIG. 1 as viewed from the back, and FIG. 5 is a first view provided on the LED display of FIG.
FIG. 6 is a plan view of the rubber terminal body, FIG. 6 is a cross-sectional view of the first rubber terminal body of FIG. 5, FIG. 7 is a view showing the bottom of the first rubber terminal body of FIG. FIG. 9 is a plan view of a second rubber terminal body shown in FIG.
FIG. 11 is a view showing the bottom of the second rubber terminal body of FIG. 8, and FIG.
FIG. 12 is a cross-sectional view showing an internal structure in a state where a rubber terminal body is attached to a second printed circuit board, FIG. 12 is a cross-sectional view showing an internal structure in a state where the second rubber terminal body is mounted on a terminal support, and FIG. FIG. 14 is an exploded perspective view illustrating an operation procedure when an LED display is mounted on an existing display device of an elevator. FIG.
It is a flowchart which shows the manufacturing method of a D display. In FIGS. 11 to 13, the same components as those shown in FIG. 15 described above are denoted by the same reference numerals. That is, 1
Is a terminal support, 3 is an outer cover, 3a is a display opening (segment), 7 is a terminal support pin, and 8 is a fixing screw.

The display device of the present embodiment shown in FIG. 13 is different from the existing display device provided with the seven-segment display device 2 shown in FIG.
And an LED display diffusion sheet 10, and other configurations are basically the same.

As shown in FIGS. 2 and 3, the LED display 9 is composed of a main body case 1 made of a synthetic resin having a high light reflectance.
1, a first printed circuit board 12 and a second printed circuit board 13 housed in the main body case 11, and lead pins 14 for electrically connecting the first printed circuit board 12 and the second printed circuit board 13. ing. The ends of the lead pins 14 are fixed to the back side of the second printed circuit board 13 with solder. The thicknesses of the first printed board 12 and the second printed board 13 are set to a minimum of 1.6 mm so as to suppress warpage.

In the main body case 11, as shown in FIG.
Seven segments (display windows) 15 are provided on the front side,
Inside each segment 15, a plurality of LED chips 16
Are arranged at equal intervals, and each LED chip 16 is set to emit light of a predetermined single color corresponding to the color when the existing filament lamp 5 shown in FIG. 15 is turned on.

As shown in FIGS. 2 and 3, the segment 15 has an inclined inner wall (inclined surface) for efficiently diffusing light when the LED chip 16 emits light. Is applied on the first printed circuit board 12 of the segment 15 so as to be covered with the film made of the transparent silicone resin 17, that is, each LED chip 16
Is coated with a transparent silicone resin 17 for promoting light diffusion during light emission. The body case 11 is formed with a screw hole 8a through which each of the two fixing screws 8 penetrates, and the back side of the body case 11 is open.

The first printed circuit board 12 includes a main body case 11
The LED chips 16 mounted on the inner bottom of the first printed circuit board 12 and arranged in the wiring pattern on the first printed circuit board 12 so as to be within the frame 15 of the first printed circuit board 12; Electronic components necessary for lighting the LED 16, for example, a diode chip for full-wave rectification (not shown) are mounted. This first printed circuit board 12 is L
A white resist process is applied to efficiently diffuse light emitted from the ED chip 16. Further, a lead pin 14 is provided for each segment 15 provided on the first printed circuit board 12, and the first pin is provided by the lead pin 14.
When power is applied from a control panel (not shown) to a predetermined segment 15 to be lit in a state where the printed circuit board 12 and the second printed circuit board 13 are electrically connected, the predetermined segment 1
5, the LED chip 16 mounted on the LED lights up,
The numbers 0 to 9 are displayed.

The second printed circuit board 13 is mounted on the back side of the main body case 11 at a predetermined distance from the first printed circuit board 12, and a plurality of current control resistors (not shown) are mounted on the second printed circuit board 13. And one first rubber terminal body 1 arranged to match the position of the segment 15
Eight and six second rubber terminal bodies 19 are mounted. The first rubber terminal body 18 and the second rubber terminal body 19 are each formed from an elliptic cylindrical silicone resin having flexibility and heat resistance, have directionality, and as shown in FIG. It is arranged so as to match the position of the cradle pin 7.

As shown in FIG. 6, the first rubber terminal body 18 has a pair of left and right insertion holes 18 penetrating between the upper end and the lower end.
a, a pair of upper grooves 18b extending from the upper part of each insertion hole 18a toward the peripheral surface, and a first rubber terminal body 18
And a pair of lower grooves 18d extending from the lower peripheral edge and lower part of each insertion hole 18a toward the peripheral surface, respectively, and has a symmetrical structure. It is. Also, in the upper part of the concave portion 18c,
A flange 18e that engages with the second printed circuit board 13 is formed.

As shown in FIG. 9, the second rubber terminal body 19 has the above-described insertion hole 18a, upper groove 18b, and recess 18c.
And a set of insertion holes 1 similar to the lower groove 18d, respectively.
9a, upper groove 19b, recess 19c and lower groove 19
d, and another insertion hole 19e formed halfway from the lower end. This insertion hole 19e does not penetrate to the upper part of the second rubber terminal body 19, and has no lower groove.
The inner diameter of 9e is set relatively large. Further, a flange portion 19f that engages with the second printed circuit board 13 is formed above the concave portion 19c.

As shown in FIG. 11, when the second rubber terminal body 19 is mounted on the second printed circuit board 13, the recess 19c of the upper groove 19b is inserted into the mounting hole 13a provided in the second printed circuit board 13. It is fixed by fitting. With the second rubber terminal body 19 attached to the second printed circuit board 13 in this manner, a lead wire 20 for passing a current to the LED chip 16 is attached by solder 21 and fixed to the back side of the second printed circuit board 13. In addition, the L provided on the terminal support 1
Two terminal pedestal pins 7 having the same concave shape and allowing current to flow through the ED chip 16 are provided on the terminal pedestal 1 at intervals of about 4 mm.

The diffusion sheet 10 protects the silicone resin 17 and the LED chip 16 from being hit by an object (not shown) to prevent breakage, and the existing diffusion sheet 4 shown in FIG. In many cases, the existing diffusion sheet 4
Used as an alternative to

In the method of manufacturing the display device according to the present embodiment, the LED display 9 is manufactured according to the operation procedure shown in FIG. That is, the first step S1
Although not shown, the first rubber terminal body 18 and the second rubber terminal body 19 are molded by flowing a silicone resin into a rubber terminal body mold and solidifying and molding. As shown in FIG. 11, the lead wire 20 is laid along the side wall of the insertion hole 19a from the upper groove 19b of the second rubber terminal body 19 on which the lead wire 20 is formed, and is drawn out from the lower groove 19d sideways along the second rubber terminal body 19. The lead wire 20 is attached by bending, and the lead wire 20 is attached to the first rubber terminal body 18 in the same manner.

(Assembly of First Printed Circuit Board 12) Next, as a third step S3, a white resist process is performed on the surface of the first printed circuit board 12, and a plurality of The LED chips 16 are arranged at equal intervals, and one of these LED chips 16 located at the end is arranged near the end of the segment 15. In addition to connecting the lead pins 14 to the wiring pattern of the first printed circuit board 12 and mounting electronic components such as a diode chip for full-wave rectification for controlling a current flowing through the LED chips 16, these LED chips 16 and electronic components are mounted. Is fixed to the first printed circuit board 12 with an adhesive. The plurality of LED chips 16 are all connected in series. The four diode chips are connected to a bridge, and are connected to a series circuit of the LED chips 16 so that a direct current flows.

(Assembly of Second Printed Circuit Board 13) Next, as a fourth step S4, as shown in FIG. 11, mounting holes 13a provided to match the positions of the terminal receiving pin 7
The second rubber terminal 19 is inserted into the second printed circuit board, and an adhesive 22 is applied to the second rubber terminal 19 to prevent the second rubber terminal 19 from being pulled out when the terminal is attached to or detached from the terminal receiving base 1. 13, and the lead wire 20 protruding from the upper groove 19 b of the second rubber terminal 19 is brought into contact with the wiring pattern on the back side of the second printed circuit board 13 to form the solder 2.
1 and the first rubber terminal body 18 is mounted on the second printed circuit board 13 in the same manner.

(Storing of Printed Circuit Boards 12 and 13) Next, as a fifth step S5, the first printed circuit board 12 is inserted from the back side of the main body case 11, and as shown in FIGS. A first step portion 11 a formed on the inner wall of the main body case 11 by the printed circuit board 12, and a segment 15
The first printed circuit board 12 is fixed to the main body case 11 with an adhesive in a state in which the main body case 1
The second printed circuit board 13 is inserted from the back side of the first printed circuit board 1, and the second printed circuit board 13 is attached to the main body case with an adhesive in a state where the end of the second printed circuit board 13 is in contact with the second step portion 12 b of the main body case 11. It is fixed to the case 11. At this time, the lead pins 14 protruding from the first printed board are fitted into fitting holes (not shown) of the second printed board 13.

(Fixation of End of Lead Pin 14) Next, in a sixth step S 6, the lead pin 14 protruding from the first printed board is soldered to a fitting hole of the second printed board 13, and Second printed circuit board 13
Electrical connection with the

(Application of Silicone Resin 17) Next, as a seventh step S7, the transparent silicone resin 1 is applied to the entire peripheral portion of the segment 15 of the main body case 11 and the entire surface portion of the first printed circuit board 12 facing the segment 15.
7 is applied. At this time, when the LED chip 16 emits light, especially if the end of the segment 15 does not diverge light efficiently, the end of the segment 15 becomes dim and a problem of color unevenness occurs. The silicone resin 17 is again applied to the ends of the two segments 15 in a mortar shape.

(Attaching of the diffusion sheet 10)
In step S8, the diffusion sheet 1
0, thereby completing the manufacture of the LED display 9.

When using the LED display 9 thus manufactured for an existing display device, first, the fixing screw 8 shown in FIG. 15 is loosened to remove the outer cover 3, the diffusion sheet 4 and the lamp suede 6. At the same time, after removing the filament type lamp 5 from the terminal receiving base 1, the LED display 9
Insertion hole 19a and insertion hole 19 of the second rubber terminal body 19 of FIG.
e, the terminal support pins 7 protruding from the terminal support 1 are respectively inserted, and the insertion holes 18 of the other first rubber terminal bodies 18 are similarly inserted.
Insert the terminal support pins 7 protruding from the terminal support 1 into the respective a. After the LED display 9 is mounted on the terminal support 1 in this way, the LED chips 16 of the segment 15 are
The diffusion sheet 10 and the outer cover 3 are mounted so as to cover the shadow of the chip at the time of light emission. Finally, the outer cover 3 is fixed by tightening with the fixing screw 8. As a result, the lead wire 20 attached to the second rubber terminal body 19 comes into contact with the terminal receiving pin 7 and the lead pattern 14 laid on the first printed circuit board 12 from the wiring pattern laid on the second printed circuit board 13. As a result, a current flows through the LED chip 16, so that the LED chip 16 is turned on.

In the embodiment thus formed, FIG.
The existing display device provided with the filament lamp 5 can be easily modified. Further, since the light source is the LED chip 16, it is possible to reduce the accident of the light source being out of the ball.

In this embodiment, as shown in FIG. 4, one of the first printed circuit boards mounted on the second printed circuit board 13 is used.
Since the rubber terminal body 18 and the six second rubber terminal bodies 19 are arranged so as to match the positions of the terminal receiving pins 7, they can be directly mounted on the existing terminal receiving pins 7. It should be noted that even if the terminal receiving pin 7 is a different display device, the rubber terminal body 1 is positioned so as to match the position of the terminal receiving pin 7.
If the positions 8 and 19 are laid, it can also be used for the other indicators described above.

In this embodiment, the LED chip 1
6 is turned on for a long time, and even if the lead wire 20 attached to the first rubber terminal body 18 generates heat, the first rubber terminal body 18 formed of silicone resin has heat resistance. The deterioration of the body 18 can be prevented. Further, the first rubber terminal body 18 is attached to the mounting hole 13 of the second printed circuit board 13.
a, but because the pin spacing and the position of the terminal support pins 7 provided on the existing terminal support 1 vary, the center of the terminal support pins 7 and the first rubber terminal Although the center positions of the insertion hole 18a and the upper groove 18b of the body 18 may be shifted, the first rubber terminal body 18 formed of silicone resin has flexibility and expands and contracts. It can be easily attached to and detached from the cradle pin 7. Further, the same applies to the second rubber terminal body 19.

In this embodiment, the LED display 9
Is a type that displays numbers as shown in FIG. 1 and may be mounted upside down with respect to the terminal support 1. However, by mounting a full-wave rectifying diode in each segment 15, the LED display 9 is mounted. Even if it is mounted upside down, a specific one of the plurality of segments 15 is turned on, so that damage to the LED chip 16 can be prevented.

In this embodiment, the length of the lead wire 20 is lengthened and bent to the outside of the second rubber terminal body 19,
It is possible to prevent the lead wire 20 from being shifted or broken at the time of attachment / detachment to / from the terminal receiving pin 7, that is, to prevent the lead wire 20 from being damaged and to make sure the lead wire 20 is in contact with the lead wire 20. Also, one insertion hole 19e of the second rubber terminal body 19
The lead wire 20 is not laid on the
Therefore, the second rubber terminal 19 can be prevented from being detached from the second printed circuit board 13 when the second rubber terminal 19 is attached or detached. Further, since the tensile load applied to the second rubber terminal body 19 at the time of attachment / detachment is about half of the conventional one per terminal, workability at the time of attachment / detachment at that time can be improved.

In this embodiment, the number of the rubber terminals 18 and 19 to be mounted on the second printed circuit board 13 is appropriately divided, and, for example, six second rubber terminals 19 are provided.
By providing one other first rubber terminal body 18 having the same insertion hole 18a, the tensile load at the time of attaching and detaching the terminal receiving pin 7 is reduced, and the individual rubber terminal bodies 18, 19 are connected to the second printed circuit board. 13 can be further prevented.

In this embodiment, the LED chip 1
Since 6 emits light in a single color, it is possible to produce a stable color with less color unevenness. Note that the emission colors of the LEDs are basically green and red, and when other colors are emitted, LEDs of different colors are combined. However, the light emission color of each LED itself is slightly different, and color unevenness during LED light emission is likely to occur. further,
Since the LED chip does not emit light but emits light only when an electric current is applied to the LED chip, color unevenness of each LED itself cannot be found unless the LED assembly is completed and electricity is actually supplied. Therefore, the individual LEDs are turned on to evaluate whether or not the lamp can be used as compared with the color sample lamp determined by the customer. If the lamp cannot be used, it must be discarded, so that the cost increases. It is preferable that the display device of the elevator is an LED chip 16 that emits a single color of orange.

In this embodiment, the segment 15
A transparent silicone resin 17 is applied on the first printed circuit board 12 visible from the outside, and an inclined inner wall is provided on the segment 15, and after assembly, the transparent silicone resin 17 is formed on the first printed circuit board 12 of the segment 15. The light emitted from the LED chip 16 can be efficiently diffused because the coating is applied so as to cover the film.

In this embodiment, the segment 15
Since the LED chip 16 is mounted near the end, the end of the segment 15 is illuminated with the light emitted from the LED chip 16 and the character displayed by this light becomes clear.

In this embodiment, the LED chip 1
Since all rectifying diodes are mounted on the LED 6, there is no problem if the power supply polarity applied to the terminal receiving pin 7 is either an AC power supply or a DC power supply, and the LED chip 16 operates. Although the LED chip 16 originally emits light by applying a DC voltage, an AC voltage is applied to the existing terminal pedestal pins 7.
Does not emit light.

In this embodiment, since the second printed circuit board 13 is provided with a plurality of current control resistors, the LED chip 1 is provided by the plurality of current control resistors.
6 can be suppressed, so that addition or change of an external circuit or the like is unnecessary. Further, by replacing the current control resistor as necessary, it is easy to cope with different AC voltages, and the cost can be reduced.

In the method of manufacturing a display device according to the present embodiment, the first printed circuit board 12 and the second printed circuit board 13 are housed in the main body case 11, and these substrates 1
Since the LEDs 2 and 13 can be integrated while being electrically connected by the lead pins 14, the LED display 9 suitable for use in the display device of the present embodiment can be obtained.

According to the manufacturing method of the present embodiment, the first printed board and the second printed board are bonded and fixed to the inner wall of the main body case in the fifth step, and then the first printed board is fixed in the seventh step.
Although the surface of the printed circuit board is coated with a silicone resin film, in order to further improve the productivity, the first printed circuit board is adhered to the inner wall of the main body case, and then the first printed circuit board facing the display window of the main body case is bonded. A coating made of a transparent silicone resin or an epoxy resin may be formed on the surface of the printed circuit board and the entire periphery of the display window of the main body case. In this case, after forming the film, the second
The printed circuit board may be bonded and fixed to the inner wall of the main body case. Further, in order to improve the productivity of the display device, it is necessary to assemble the first printed circuit board, adhere and fix the first printed circuit board in the main body case, and perform the entirety of the display window of the main body case and the portion facing the display window. (1) In parallel with the work of applying the silicone resin to the surface of the printed circuit board, the work of assembling the second printed circuit board, attaching the rubber terminal body to the second printed circuit board, and attaching the lead wire to the rubber terminal body is performed in parallel. After that, electrical connection between the first printed board and the second printed board is performed, and then, a diffusion sheet may be attached to the surface of the main body case.

[0076]

As described above, according to the display device of the present invention, the display device can be easily mounted on the terminal support provided on the existing display device having the filament type lamp, and the light source can be cut off accidentally. Therefore, the present invention can be applied to an existing display device equipped with a filament lamp and can reduce maintenance and replacement work.

According to the method of manufacturing a display device of the present invention, the first printed circuit board and the second printed circuit board are housed in the main body case, and these boards are integrally connected in a state where they are electrically connected by the lead pins. Therefore, an LED display suitable for use in the above-described display device can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of an LED display provided in a display device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the LED display of FIG. 1;

FIG. 3 is a lower cross-sectional view of the LED display of FIG. 1;

FIG. 4 is a view of the LED display of FIG. 1 as viewed from the back side.

FIG. 5 is a plan view of a first rubber terminal body provided in the LED display of FIG. 1;

FIG. 6 is a sectional view of the first rubber terminal body of FIG. 5;

FIG. 7 is a view showing a bottom of the first rubber terminal body of FIG. 5;

FIG. 8 is a plan view of a second rubber terminal body provided in the LED display of FIG. 1;

FIG. 9 is a sectional view of the second rubber terminal body of FIG. 8;

FIG. 10 is a view showing a bottom of the second rubber terminal body of FIG. 8;

FIG. 11 is a cross-sectional view showing an internal structure in a state where a second rubber terminal body is attached to a second printed circuit board.

FIG. 12 is a cross-sectional view showing an internal structure in a state where a second rubber terminal body is mounted on a terminal support.

FIG. 13 is an exploded perspective view illustrating an operation procedure when the LED display of FIG. 1 is mounted on an existing display device of an elevator.

FIG. 14 is a flowchart illustrating a method of manufacturing the LED display of FIG. 1;

FIG. 15 is an exploded perspective view showing a conventional display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal receiving stand 3 Outer cover 3a Display opening 7 Terminal receiving stand pin 9 LED display (display electronic member) 10 Diffusion sheet 11 Main body case 11a 1st step part 11b 2nd step part 12 1st printed circuit board 13 2nd printing Substrate 14 Lead pin 15 Segment (display window) 16 LED chip 17 Transparent silicone resin 18 First rubber terminal 18a Insert hole 18d Collar 19 Second rubber terminal 19a, 19e Insert hole 19f Collar 20 Lead wire 21 Solder 22 Adhesive

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Onishi 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building Systems Co., Ltd. (72) Inventor Hiroaki Matsubara 1-38-8 Higashiikebukuro, Toshima-ku, Tokyo Luna Within Light Co., Ltd. (72) Inventor Seiichi Sato 1-33-8, Higashiikebukuro, Toshima-ku, Tokyo Luna Light Co., Ltd. F-term (reference) 5C094 AA41 AA43 AA52 BA23 CA15 DA12 DB01 DB05 EA02 ED13 FA01 FA02 GB01 5F041 AA44 DB05 DC03 DC08 DC10 DC61 FF04 5G435 AA00 AA19 BB04 CC05 EE04 EE13 EE34 EE41 FF06 GG26 KK05

Claims (15)

[Claims] 1. A display electronic member detachable from a terminal receiving base of a device, and a plurality of display openings are provided on a front surface side,
In a display device having an outer cover in which the display electronic member is detachably stored and a diffusion sheet provided on the inner bottom of the outer cover, the display electronic member has a plurality of display windows on a front surface side. A main body case provided with the back side open, a first printed circuit board provided with at least a plurality of LED chips, and a rubber connected to at least a plurality of current control resistors and a terminal support of the device. A second printed circuit board on which a terminal body is provided, and a lead pin for electrically connecting the first printed circuit board and the second printed circuit board; and the first printed circuit board and the second printed circuit board in the main body case.
A display device, wherein a printed circuit board and a printed circuit board are integrated while electrically connected to each other by the lead pins. 2. The display according to claim 1, wherein the plurality of LED chips are arranged at equal intervals on the first printed circuit board in a state where the plurality of LED chips face each of the plurality of display windows. apparatus. 3. The display window of the main body case is provided with the L
The display device according to claim 1, further comprising an inclined surface that reflects light emitted from the ED chip to the outside of the main body case. 4. An entire peripheral portion of the display window and an entire surface portion of the first printed circuit board facing the display window,
4. A coating made of a transparent silicone resin or an epoxy resin, wherein a coating on an entire peripheral portion of the display window is thicker than a coating on a surface portion of the first printed circuit board. The display device according to any one of the above. 5. The main body case is formed from a low-warp synthetic resin, and the thickness of each of the first printed board and the second printed board is set to a predetermined size for suppressing the warpage of each board. Claims 1 to
5. The display device according to any one of 4. 6. The display device according to claim 1, wherein said rubber terminal body is formed of a silicone resin having flexibility and heat resistance. 7. The rubber terminal body having an elliptical cylindrical shape to have directionality, and two rubber insertion holes which can be inserted into two terminal receiving pins provided in a terminal receiving base of the device, are provided in the rubber terminal body. 7. The display according to claim 1, wherein an inner diameter of one of the two insertion holes is formed larger than an outer diameter of the terminal receiving pin. apparatus. 8. The display device according to claim 1, wherein a brim portion that engages with the second printed circuit board is provided at an end of the rubber terminal body. 9. The display device according to claim 1, wherein said LED chip emits light of a predetermined single color. 10. A diode chip for full-wave rectification, wherein a plurality of LED chips disposed in opposition to a display window of the main body case are connected in series, and current supplied to these LED chips is rectified. 10. The display device according to claim 1, wherein the display device is connected. 11. A display electronic member detachably mountable to a terminal pedestal of a device, and an outer cover provided with a plurality of display openings on a front surface side, wherein the display electronic member is removably housed. In a display device having a diffusion sheet provided on the inner bottom of the outer cover, the display electronic member is provided with a plurality of display windows on a front surface side, and a main body case having a back surface opened, A first printed circuit board provided with at least a plurality of LED chips and a diode chip for full-wave rectification, and a second printed board provided with at least a plurality of current limiting resistors and a rubber terminal body connected to a terminal support of the device. A substrate, and lead pins for electrically connecting the first printed circuit board and the second printed circuit board. 2
If the printed circuit board is integrated with the lead pins in a state where they are electrically connected, and if the display electronic member is installed upside down on the terminal cradle of the device, a mounting reverse error indication is displayed. The plurality of L
A display device characterized in that only a specific LED chip among the ED chips can be turned on. 12. The outer cover is provided with seven display openings arranged substantially in the shape of a letter on the surface thereof, and the main body case is provided with seven display windows, and these seven display windows are provided. A state in which seven LED chips are arranged in a substantially letter-shaped manner on the front surface side of the first printed circuit board so as to face each other, and the display electronic member is installed upside down on a terminal support of the device. 12. The display device according to claim 11, wherein only the upper and lower LED chips out of the seven LED chips are turned on in the case of the above. 13. A first step in which an outer dimension of the second printed board is set to be larger than an outer dimension of the first printed board, and an end of the first printed board abuts on an inner wall in the main body case. The display device according to any one of claims 1 to 12, further comprising a unit and a second step portion with which an end of the second printed board contacts. 14. A display electronic member detachably mountable to a terminal cradle of a device, and an outer cover provided with a plurality of display openings on a front surface side and in which the display electronic member is removably accommodated. And a diffusion sheet provided on the inner bottom of the outer cover, wherein the existing display electronic member and the existing diffusion sheet can be replaced with a new display electronic member and a new diffusion sheet, respectively, The member includes a main body case having a plurality of display windows on the front side and an open back side, a first printed circuit board on which at least a plurality of LED chips are provided, and at least a plurality of current control resistors. Second printed circuit board provided with a rubber terminal body connected to a container and a terminal receiving stand of the device, and electrical connection between the first printed circuit board and the second printed circuit board It performed and a lead pin, and in the body case, the display device of the first printed circuit board and the second printed circuit board, characterized in that is integrated in a state of being electrically connected by the lead pins. 15. A display electronic member detachably mountable to a terminal cradle of a device, and an outer cover provided with a plurality of display openings on a front surface side, wherein the display electronic member is detachably housed. In the method of manufacturing a display device having a diffusion sheet provided on the inner bottom of the outer cover, when manufacturing the display electronic member, a silicone resin is poured into two sets of rubber terminal body dies having different shapes of insertion holes. By solidifying and molding, the first rubber terminal body having a plurality of insertion holes of the same shape and connected to the terminal cradle of the device, and the plurality of insertion holes of different shapes, First to fabricate a second rubber terminal body connected to the terminal cradle
A second step of forming a terminal portion by attaching a lead wire to the rubber terminal body after the first step, a plurality of LED chips, a full-wave rectification diode chip, and a plurality of lead pins. A third step of assembling a first printed board provided with a plurality of current limiting resistors, a second print provided with the first rubber terminal body and the second rubber terminal body, and a plurality of lead pin fitting holes. After the fourth step of assembling the board, and after the first to fourth steps, the assembled first printed board is housed in a main body case provided with a plurality of display windows on the front surface side, and After fixing the printed circuit board to the first step formed on the inner wall of the main body case with an adhesive, the assembled second printed circuit board is stored in the main body case, and the second printed circuit board is A fifth step of fixing the second printed circuit board to a second step formed on the inner wall of the main body case with an adhesive in a state where the lead pins of the first printed circuit board are fitted in the fitting holes for lead pins; After the fifth step, the lead pins of the first printed board are soldered to the lead pin fitting holes of the second printed board to electrically connect the first printed board and the second printed board. And after the fifth step, a transparent silicone resin or a transparent silicone resin is applied to the entire peripheral portion of the display window of the main body case and the entire surface portion of the first printed circuit board facing the display window. A display device comprising: a seventh step of applying a coating made of an epoxy resin; and an eighth step of attaching a diffusion sheet to the main body case surface after the first to seventh steps are completed. Manufacturing method.