JP7218914B2 - light emitting display - Google Patents

Description

The present invention relates to a light-emitting display device in which a plurality of light-emitting elements are two-dimensionally arranged.

2. Description of the Related Art Conventionally, there has been proposed an electronic display device in which a plurality of light emitting elements are arranged two-dimensionally (see Patent Document 1). The electro-optical display device includes an electro-optical display unit having a plurality of light-emitting elements, and a light emission control unit that selectively and sequentially causes a plurality of light-emitting bodies included in the electro-optical display unit to emit light.
Also, as an image display panel, a display panel in which a plurality of light emitting elements are mounted on a flexible wiring substrate has been proposed (see Patent Document 2).

JP-A-10-307549 JP 2018-151519 A

In order to change the shape of the light-emitting display device according to the shape of the mounting location, the inventor of the present application uses the flexible wiring board as in Patent Document 2 in the light-emitting display device (electric display device) as in Patent Document 1. I am considering adopting it as
However, when mounting a battery or electronic components (electronic components that make up the light emission control unit) on a flexible wiring board, if the flexible wiring board is bent with a strong force, the electrical connection between the battery and the wiring may be broken, or the electronic component may become damaged. There is a risk that the electrical connection of the wiring will come off.

If the material and thickness of the flexible wiring board are adjusted to make the flexible wiring board less likely to bend, it is possible to suppress or prevent disconnection between the wiring and the battery or electronic component. However, in this case, the flexible wiring board cannot be bent satisfactorily, and as a result, the shape of the light-emitting display device cannot be sufficiently matched to the shape of the mounting location.
That is, it is necessary to solve the contradictory problem of being able to bend the flexible wiring board satisfactorily and suppressing or preventing the detachment of the driving parts (batteries and electronic parts) when the flexible wiring board is bent. be.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a light-emitting display device in which a flexible wiring board can be bent satisfactorily, and disconnection of drive components when the flexible wiring board is bent can be suppressed or prevented. be.

The present invention provides a plurality of light emitting elements arranged two-dimensionally, a drive component used for driving lighting of the plurality of light emitting elements, and a flexible wiring board having flexibility, wherein the plurality of light emitting elements and a flexible wiring board having a first area where the drive component is mounted, and a second area, different from the first area, where the driving component is mounted . offer. The plurality of light-emitting elements are mounted on the surface of the first area of the flexible wiring board, and the driving component is mounted on the surface of the second area of the flexible wiring board . The light-emitting display device further includes a reinforcing plate overlaid on the back surface of the second region to reinforce the second region.

In one embodiment of the present invention, the flexible wiring board has a longitudinal side, and the first region and the second region are arranged along the longitudinal direction of the flexible wiring board .
In one embodiment of the present invention, the back surface of the reinforcing plate on the side opposite to the flexible wiring board side forms a flat surface over the entire area .

In one embodiment of the present invention, a cover body for covering the drive component is further included on the surface side of the second region of the flexible wiring board.
In one embodiment of the present invention, the drive components include a battery used as a power source for lighting the plurality of light emitting elements, an electronic component constituting a light emission control section for controlling lighting of the plurality of light emitting elements, and at least one of antennas used for wireless communication for lighting the plurality of light emitting elements .
The reinforcing plate may not cover the back surface of the first region. The cover body may not cover the surface of the first region.

According to the present invention, it is possible to prevent the bending of the second region of the flexible wiring board while allowing the bending of the first region of the flexible wiring board. Since the second region does not bend, it is possible to suppress or prevent disconnection of the mechanical or electrical connection between the drive component and the printed wiring when the flexible wiring board is bent.
Therefore, it is possible to provide a light-emitting display device in which the flexible wiring board can be bent satisfactorily and disconnection of the drive components when the flexible wiring board is bent can be suppressed or prevented.

1 is a perspective view of a light emitting display device according to an embodiment of the present invention; FIG. 2 is a front view of the light-emitting display device; FIG. 2A, 2B, 2C, and 2D are a plan view, a rear view, and a left side view of the light-emitting display device; FIG. 4 is a perspective view showing a state in which the flexible wiring board of the light emitting display device is bent; FIG. It is a figure of the armband to which the said light emitting display is attached. FIG. 4 is a diagram of a shoulder bag to which the light-emitting display device is attached; It is a figure which shows the structure of the rucksack to which the said light emitting display is attached. FIG. 11 is a rear view of a main part of a light-emitting display device according to a modified example;

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of a light-emitting display device 1 according to one embodiment of the invention. FIG. 2 is a front view of the light-emitting display device 1. FIG. FIG. 3A is a plan view of the light-emitting display device 1. FIG. FIG. 3B is a rear view of the light-emitting display device 1. FIG. FIG. 3C is a left side view of the light-emitting display device 1. FIG. Only FIG. 2 shows the state inside the cover body 6 in a see-through manner.

The light-emitting display device 1 includes a flexible wiring board 2 having flexibility, a dot display section 4 including a plurality of light-emitting elements 3 (a large number, 576 in the example of FIG. 1) arranged two-dimensionally, and a plurality of light-emitting elements. It includes a drive component 5 used for lighting drive of the element 3, a box-shaped cover body 6 covering the drive component 5, and a reinforcing plate 7 (see FIG. 3) that reinforces the flexible wiring board 2. Since the flexible wiring board 2, which occupies most of the light-emitting display device 1 when viewed from the front, has flexibility, its form can be changed according to the shape of the mounting location.

In the following description, it is assumed that the light emission direction of the plurality of light emitting elements 3 forming the dot display portion 4 is forward.
The flexible wiring board 2 is a printed wiring board. The flexible wiring board 2 has a rectangular shape extending in the left-right direction (longitudinal direction L). A plurality of printed wirings are provided on the flexible wiring board 2 . Each printed wiring is a wiring for supplying power from a battery 8 to be described later to the corresponding light emitting element 3 . A plurality of printed wirings are formed not only on the front surface 2 a of the flexible wiring board 2 , but also on the back surface 2 b of the flexible wiring board 2 . A pair of front and back printed wiring (anode wiring and cathode wiring) corresponds to each light emitting element 3 . A pair of front and back printed wirings corresponding to each other are electrically connected to each other via through holes (not shown) penetrating the flexible wiring board 2 . The front and back printed wirings are covered with an insulating ink to prevent exposure to the front surface 2a and back surface 2b.

The flexible wiring board 2 is formed using polyimide, for example. The flexible wiring board 2 is constructed using a single-layer board instead of laminating a plurality of boards. Flexible wiring board 2 has a thickness of about 0.1 mm, for example. As a result, the flexible wiring board 2 can be largely bent as shown in FIG. In addition, the material and thickness of the flexible wiring board 2 are examples, and are not limited to these examples.

The flexible wiring board 2 includes a first area A1 where the plurality of light emitting elements 3 are mounted, and a second area A2 where the drive components 5 are mounted. The first area A1 and the second area A2 are different areas. In the example of FIG. 1 , the first area A1 and the second area A2 are rectangular areas and are arranged along the longitudinal direction L of the flexible wiring board 2 . The first area A1 is wider than the second area A2. In the example of FIG. 1 , the first area A1 and the second area A2 are provided adjacent to each other in the longitudinal direction L of the flexible wiring board 2 . Since the second area A2 is arranged adjacent to the first area A1, the size of the light-emitting display device 1 can be reduced in the longitudinal direction L. In other words, it is possible to increase the size of the first area A1 with respect to the size of the light-emitting display device 1 .

Each light emitting element 3 is, for example, an LED (light emitting diode). This LED is, for example, a monochromatic LED. Therefore, each LED has a one-to-one correspondence with the printed wiring. As shown in FIG. 1, the plurality of light emitting elements 3 are arranged in a grid pattern (in a matrix pattern (in the example of FIG. 1, 12 vertical elements×48 horizontal elements)).
The drive component 5 includes, for example, a battery 8 that is a power source for the plurality of light emitting elements 3, a light emission control section 9 that controls lighting of the plurality of light emitting elements 3, a light emission control section 9, and an external transmission device (for example, a portable device such as a smartphone). communication terminal), and a switch element 11 for switching on/off the light emission of the plurality of light emitting elements 3 .

Battery 8 is a rechargeable battery. A charging terminal 12 such as a USB terminal is connected to the battery 8 . The battery 8 is charged by inserting one end of a charging cable (not shown), the other end of which is plugged into an outlet, into the charging terminal 12 . The battery 8 is mounted on the surface 2a of the second area A2 of the flexible wiring board 2. As shown in FIG. A battery 8 is arranged in the upper part of the second area A2 and is attached to the surface 2a by soldering. In this attached state, the battery 8 is mechanically coupled to the surface 2 a and electrically connected to the printed wiring of the flexible wiring board 2 .

The light emission control unit 9 includes a plurality of electronic components 13 such as resistors, diodes, capacitors, switching elements, and the like. A plurality of electronic components 13 are mounted on the surface 2 a of the second area A<b>2 of the flexible wiring board 2 . A plurality of electronic components 13 are arranged in the lower portion of the second area A2 and attached to the surface 2a by soldering. In this attached state, the plurality of electronic components 13 are mechanically coupled to the surface 2a, and the plurality of electronic components 13 are electrically connected to the printed wiring of the flexible wiring board 2. FIG. A circuit for controlling light emission of the light emitting element 3 is configured by the light emission control section 9 and the printed wiring.

Antenna 10 is an antenna for wireless communication, and employs, for example, a Bluetooth (registered trademark) transmission/reception module. The antenna 10 may be a chip antenna or a pattern antenna.
The switch element 11 is mounted on the surface 2a of the second area A2 of the flexible wiring board 2. As shown in FIG. The switch element 11 is arranged in the lower portion of the second area A2 and attached to the surface 2a by soldering. In this attached state, the switch element 11 is mechanically coupled to the surface 2 a and electrically connected to the printed wiring of the flexible wiring board 2 .

As shown in FIGS. 3(a) to 3(c), the reinforcing plate 7 has a rectangular shape matching the shape of the rear surface of the second area A2 of the flexible wiring board 2. As shown in FIG. The reinforcing plate 7 is, for example, sheet metal and is formed using steel. The reinforcing plate 7 is superimposed on the back surface 2b of the second area A2 of the flexible wiring board 2 to reinforce the second area A2. The reinforcing plate 7 has a rectangular shape matching the second area A2. The reinforcing plate 7 covers the entire rear surface 2b of the second area A2. Almost the entire rear surface 7a of the reinforcing plate 7 is flat. The reinforcing plate 7 is joined to the back surface 2b of the second area A2 using an adhesive.

The cover body 6 is made of synthetic resin and has a rectangular shape matching the front (front) shape of the second area A2. The cover body 6 may be configured using a transparent material, for example. The cover body 6 covers the front sides of the battery 8 , the plurality of electronic components 13 , the antenna 10 and the switch element 11 . Almost the entire front surface 6a of the cover body 6 is flat.
A notch 15 is formed in the front surface 6 a of the cover body 6 . The cutout 15 cuts out the front surface 6a to form an operation piece 16 for turning on/off the switch element 11. As shown in FIG. By the operation of the operation piece 16 by the user, the switch element 11 is turned on and off, whereby the light-emitting display device 1 is switched on and off.

The dot display portion 4 displays characters, numbers, patterns, and the like. Using the application software of the external transmission device (not shown), display content is created in the external transmission device. Then, when an input signal about the display content is given to the light emission control unit 9 from the external transmission device via the antenna 10, the light emission control unit 9 turns on the light emitting element 3 corresponding to the display content, The dot display section 4 is caused to display corresponding to the input display contents. The display of the dot display section 4 may be static display or dynamic display such as scroll display.

FIG. 4 is a perspective view showing a state in which the flexible wiring board 2 of the light-emitting display device 1 is bent. It is possible to display characters, numbers, patterns, etc. on the dot display section 4 while the flexible wiring board 2 is bent.
A second area A2 where the drive component 5 is mounted is reinforced by a reinforcing plate 7 from the side opposite to the side where the drive component 5 is mounted. Since the first area A1 and the second area A2 are arranged along the flexible direction of the flexible wiring board 2 (that is, the longitudinal direction L), the first area A1 alone would be sufficient if the reinforcing plate 7 were not provided. Therefore, the second area A2 is also largely bent. In this case, the battery 8, the electronic component 13, the switch element 11, and the printed wiring may be disconnected mechanically or electrically.

Since the second area A2 is reinforced by the reinforcing plate 7, the second area A2 does not bend even when the first area A1 bends. Therefore, when the flexible wiring board 2 is bent, the battery 8, the electronic component 13, the switch element 11, and the printed wiring are not disconnected mechanically or electrically.
Although a case in which a large force is artificially applied to the flexible wiring board 2 cannot be ruled out, even in such a case, mechanical connection or electrical It is possible to suppress or prevent the disconnection of the physical connection.

FIG. 5 is a diagram of an armband 20 to which the light-emitting display device 1 is attached. FIG. 5(a) is a front view of the arm band 20. FIG. FIG. 5(b) is a rear view of the arm band 20. FIG. The arm band 20 includes a housing portion 21 for housing the light-emitting display device 1 , a window portion 22 provided on the front surface of the housing portion, and an entrance hole 23 provided at one end portion in the longitudinal direction of the arm band 20 . , and a coupling portion 24 provided at the other end of the longitudinal surface 20 a of the armband 20 . The entrance/exit hole 23 communicates with the inside of the accommodating portion 21 . The connecting portion 24 is, for example, a hook-and-loop fastener, and can be connected to one end of the back surface 20b of the arm band 20 while the arm band 20 is wrapped around the user's arm. The window part 22 may be formed only by an opening, or may be configured by a transparent plate. In a state where the light-emitting display device 1 is housed in the housing portion 21 of the arm band 20 , the dot display portion 4 (see FIG. 1 and the like) can be visually recognized through the window portion 22 .

FIG. 6 is a diagram of a shoulder bag 30 to which the light-emitting display device 1 is attached. FIG. 7 is a diagram showing the configuration of a rucksack 40 to which the light-emitting display device 1 is attached. The light-emitting display device 1 can be stored in a storage portion 31 provided in the shoulder bag 30 , and the light-emitting display device 1 stored in the storage portion 31 can be visually recognized through the window portion 32 . The window part 32 may be formed only by an opening, or may be configured by a transparent plate. Further, the light-emitting display device 1 can be stored in the storage portion 41 provided in the rucksack 40 , and the light-emitting display device 1 stored in the storage portion 41 can be visually recognized through the window portion 42 . The window part 42 may be formed only by an opening, or may be configured by a transparent plate.

As described above, according to this embodiment, the area where the reinforcing plate 7 is arranged is different from the first area A1 where the plurality of light emitting elements 3 are arranged. Therefore, it is possible to bend the first area A1 in which the plurality of light emitting elements 3 are mounted. Moreover, the reinforcing plate 7 overlaps the second area A2 where the drive component 5 is mounted from the side opposite to the mounting side of the drive component 5, thereby reinforcing the second area A2. Therefore, it is possible to reliably prevent the second area A2 from bending.

This makes it possible to prevent the bending of the second area A2 while allowing the bending of the first area A1. Since the second area A2 does not bend, it is possible to suppress or prevent disconnection of mechanical or electrical connection between the drive component 5 and the printed wiring when the flexible wiring board 2 is bent.
Therefore, it is possible to provide the light-emitting display device 1 in which the flexible wiring board 2 can be bent satisfactorily and disconnection of the drive component 5 when the flexible wiring board 2 is bent can be suppressed or prevented.

Further, the rear surface 7a of the reinforcing plate 7 forms a flat surface over the entire area. The back surface of the light-emitting display device 1 is composed of the back surface 7a of the reinforcing plate 7 and the back surface 2b of the first area A1 of the flexible wiring board 2 (see FIG. 3B). Therefore, as shown in FIG. 3A, when nothing is provided on the back surface 2b of the first region A1, the back surface of the light-emitting display device 1 is only a flat surface (that is, the back surface 7a of the reinforcing plate 7). It is also possible to configure only the rear surface 2b of the first area A1). In this case, the rear surface of the light-emitting display device 1 can be smoothly taken in and out of the housing portions 21 , 31 and 41 without interfering with the housing portions 21 , 31 and 41 .

Furthermore, since the drive component 5 is covered with the cover body 6 , it is possible to prevent the drive component 5 from interfering with the housing portions 21 , 31 and 41 when the light-emitting display device 1 is inserted into and removed from the housing portion 21 . As a result, the light-emitting display device 1 can be smoothly put in and taken out of the accommodating portions 21 , 31 , and 41 .
Although one embodiment of the present invention has been described above, the present invention can also be implemented in other forms.

For example, as shown in FIG. 8, the reinforcing plate may cover only part of the second area A2 instead of covering the entire second area A2. In the example of FIG. 8, the reinforcing plate 107 used in place of the reinforcing plate 7 has a notch 107B that cuts out one of the four corners of the rectangle (upper right corner in FIG. 8). The rest of the configuration is the same as that of the reinforcing plate 7 . In the example of FIG. 8, an antenna 110 used instead of the antenna 10 is arranged (mounted) on the back surface 2b of the second area A2, not on the surface 2a of the second area A2. More specifically, the antenna 110 is arranged (mounted) in a region of the rear surface 2b of the second region A2 that is not covered by the reinforcing plate 7. As shown in FIG. In this case, the antenna 110 is not included in the driving component 5 mounted on the surface 2a of the second area A2.
Antenna 110 is an antenna for wireless communication, and employs, for example, a Bluetooth (registered trademark) transmission/reception module. Antenna 110 is a pattern antenna in the example of FIG. Antenna 110 includes a serpentine antenna circuit 111 . The antenna 110 (antenna circuit 111) is covered with insulating ink. Therefore, the antenna 110 (antenna circuit 111) is not exposed on the rear surface 2b of the flexible wiring board 2. FIG.

Also, a vibrator may be provided on the surface 2 a of the flexible wiring board 2 . In this case, the vibrator may be provided in the second area A2. More specifically, the vibrator may be accommodated in the space between the surface 2a of the second area A2 and the cover body 6 (the space covered by the cover body 6). In this case, when a vibration signal from an external transmission device (not shown) is applied to the light emission control section 9 via the antenna 10, the light emission control section 9 causes the vibrator to vibrate. Thereby, the second area A2 can be vibrated.

Moreover, in the above-described embodiments, the flexible wiring board 2 may be configured by laminating a plurality of substrate layers. In this case, the flexible wiring board 2 is configured by stacking two substrate layers or three substrate layers. Bonding between individual layers can be accomplished by at least one of heat welding and high pressure welding. Printed wiring is formed on the front and back surfaces of each layer. A pair of printed wirings on the front and back of each layer are electrically connected to each other via through holes (not shown) penetrating the layer. Printed wiring on the front and back is covered with an insulating ink to prevent exposure to the front and back surfaces of individual layers. Thus, by configuring the flexible wiring board 2 by laminating a plurality of substrate layers, a large number of light emitting elements 3 can be obtained regardless of the area of the mounting area (first area A1) for the plurality of light emitting elements 3. can power the Thereby, more light emitting elements 3 can be mounted on the flexible wiring board 2 .

In the above-described embodiment, the LEDs employed as the individual light emitting elements 3 may be multicolor LEDs (RGB). That is, the number of elements included in each LED (RGB) is three. In this case, it is desirable to adopt a lamination type flexible wiring board 2 in which a plurality of substrate layers are laminated in order to properly supply power to all the light emitting elements 3 (LEDs (RGB)).

In the above-described embodiment, the drive component 5 includes the battery 8, the electronic component 13, the antenna 10, and the switch element 11. However, the drive component 5 does not necessarily include all of these components. or the like and the light emission control unit 9 may be provided.
Further, in the above-described embodiments, the light-emitting display device 1 is assumed to be used with its longitudinal direction L extending horizontally. You may use it in the state along the diagonal direction.

Further, in the above-described embodiment, the dot display section 4 can display characters, numbers, pictures, etc. by arranging the light emitting elements 3 two-dimensionally, even if the light emitting elements 3 are not arranged in a grid pattern. configuration.
Further, in the above-described embodiment, the first area A1 and the second area A2 may be spaced apart in the longitudinal direction L of the flexible wiring board 2 .

In the above-described embodiment, the front surface of the driving part 5 is covered with the cover body 6. However, the cover body 6 can be omitted if there is no adverse effect even if the cover body 6 is omitted. be.
In addition, various design changes can be made within the scope of the matters described in the claims.

Reference Signs List 1: Light-emitting display device 2: Flexible wiring board 2a: Front surface 2b: Back surface 3: Light-emitting element 4: Dot display unit 5: Driving component 6: Cover body 7: Reinforcing plate 13: Electronic component A1: First area A2: Second 2 area L: longitudinal direction

Claims (3)

A flexible wiring board having flexibility and having a longitudinal length , wherein a first region and a region different from the first region are formed along the longitudinal direction of the flexible wiring board. a flexible wiring board having a second region aligned with the region;
a plurality of light emitting elements mounted on the surface of the first region and arranged two-dimensionally;
a driving component mounted on the surface of the second region and used for lighting driving of the plurality of light emitting elements;
a reinforcing plate superimposed on the back surface of the second region to reinforce the second region;
a cover body covering the surface of the second region and the drive component ;
The light-emitting display device , wherein the reinforcing plate does not cover the back surface of the first region, and the cover body does not cover the front surface of the first region . 2. The light-emitting display device according to claim 1 , wherein the back surface of the reinforcing plate on the side opposite to the flexible wiring board side forms a flat surface over the entire area. The drive components include a battery used as a power source for lighting the plurality of light emitting elements, an electronic component constituting a light emission control section for controlling lighting of the plurality of light emitting elements, and a light emitting element for lighting the plurality of light emitting elements. 3. The light-emitting display device according to claim 1, comprising at least one of antennas used for wireless communication.

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