JPH08129352A - Electric display sheet - Google Patents

Abstract

PURPOSE: To provide an electric display sheet which is capable of maintaining specified or higher light emitting power over a long period of time, allows free control of light emission and is flexibly dealable with bending and twisting as well by hermetically protecting a flexible printed circuit board packaged with electronic devices, such as light emitting elements with a resin sheet member molded into an arbitrary shape. CONSTITUTION: The flexible circuit board 100 packaging devices, such as light emitting elements 4, capacitors, resistors and switches, and power source parts 200 consisting of solar batteries, etc., are hermetically covered with the resin sheet member 3 having resilience to form the electric display sheet 1. Pictures, characters, etc., 10 are colored and printed in parts 3a where the surface of the sheet member 3 builds up partially. The built-up part 3a have transmissivity and the many light emitting elements 4 are arranged therein so that these parts are distinctly displayed by the light emitted from the inner side in the night time. This electric display sheet 1 is universally bendable and is freely settable to change flicker, etc., the emitted light colors with a microcomputer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a flexible printed wiring board on which an electronic device such as a light emitting element having a rivet shape is mounted in a resin sheet member or a resin plate, and displays a message such as a picture or a character. The present invention relates to an electronic display sheet for electronically displaying.

[0002]

2. Description of the Related Art Conventionally, as a means for electronically displaying a message such as a picture or a character, a fluorescent sheet in which a message such as a picture or a character is printed on a resin sheet with fluorescent paint and a resin plate surface are printed. A light emitting element mounted on a hard printed wiring board is used to form pictures, letters, etc.
There are electronic display boards and the like that allow letters and the like to rise brightly from the inside. For example, they have come to be used for automobile stickers, license plates, display boards of various devices, and the like.

[0003]

However, since the fluorescent sheet has a weak light emitting power, it is difficult to see at night, and the light emitting power decreases with use. It was only used as a mark to do.

On the other hand, the electronic display board has an advantage that it can always maintain a constant strong light-emitting power in that a message such as a picture or a character is electronically displayed by a light-emitting element such as an LED installed inside. , The lead wires of various electronic devices including this light emitting element are mounted by soldering to a conductive pattern formed at a proper position of a hard printed wiring board, so that the following problems occur. .

First, since the printed wiring board substrate is hard, it is difficult to stick it along a curved surface such as a utility pole.

Secondly, since the substrate is hard, there is a possibility that the printed wiring board may be cracked by an external pressure such as dropping, or the soldered portion with the electronic device may come off. Particularly, when the electronic device is mounted by soldering it directly on the surface of the substrate, the impact is directly transmitted to the device, so that the electronic device is easily damaged.

Thirdly, there is an idea that a flexible printed wiring board may be used in response to the problems of the above-mentioned first and second, but when the flexible printed wiring board is bent, the flexible printed wiring board expands and contracts in the bent portion of the wiring board. May occur, the lead wire of the electronic device mounted on this portion may be pulled, and the soldered portion may come off, or the lead wire may pull out from the inside of the device.

The present invention has been proposed in order to solve the above problems, and has a rivet-shaped light emitting element,
A flexible printed wiring board on which electronic devices such as capacitors, resistors, switches, etc. are mounted is molded into an arbitrary shape by a resin sheet member, or by airtightly protecting it inside the resin plate Since the drawn characters and patterns are configured to be displayed electronically, the luminous power above a certain level can be maintained for a long period of time, and the light emission can be controlled freely, and flexibly copes with bending and twisting. It is an object of the present invention to provide a light-emitting display sheet that is light, easy to use, has few failures, and has a wide variety of applications.

[0009]

A light emitting display sheet according to the first structure of the present invention, which is proposed in order to solve the above problems, includes a light emitting element having a rivet shape, a capacitor,
A flexible printed wiring board on which electronic devices such as resistors and switches are mounted is covered with a resin sheet member molded into an arbitrary shape.

A second electroluminescent display sheet according to the present invention is a light emitting device having a rivet shape, a capacitor,
It is characterized in that a flexible printed wiring board on which electronic devices such as resistors and switches are mounted is embedded in a resin plate.

In a subsequent electroluminescent display sheet according to a second aspect of the present invention, the light emitting element is arranged along a character, a picture, a pattern, etc. drawn on the sheet member and the resin plate,
It is characterized in that it is configured to lighten pictures, patterns and the like.

[0012]

When the electronic display sheet of the present invention is used as a sticker to be attached to the rear part of an automobile, driving indications such as "Collision warning", company names such as "○○○ company" and messages such as advertisements can be displayed in the daytime. Not only that, it will be possible to clearly display electric light at night. In addition, the place name display board that can be seen even at night,
As an advertisement board, there are various uses such as a guide board that can be seen even in a dark place, especially a message board at a concert hall.

The electric light of the electroluminescent display sheet is generated by a light emitting element such as an LED mounted in a resin sheet member, and the element is printed on the surface of the sheet member.
A large number are arranged along the characters and the like. In addition, the change of emission color,
Blinking or the like can be freely set by a microcomputer or the like mounted on the board, and a solar cell as a power source thereof is internally provided in a sheet member or a resin plate like the board or the like. In addition, when the lightning sheet is large, it may have a structure in which the power supply line is drawn from the outside.

The electronic display sheet may be kept in a constantly lit state, but may be controlled so as to be lit when a certain period of time or darkness over a certain period.
Therefore, the display can be electronically displayed at night as well as printed display of pictures and characters in the daytime, and the life thereof is semi-permanent.

Since this electronic display sheet can be bent freely, it can be easily attached to a curved rear glass or a vehicle body when it is used as a sticker of an automobile as described above. The front portion can be formed in a suction cup shape so that it can be easily attached to the inner surface of the rear glass.

Further, as the electronic display board of the present invention, for example,
In public buildings, it can be used as a display board for "exit", "blame stairs", "fire extinguisher", "non-smoking", etc., as a bus guide board, timetable, etc. It can be used for lightning switches.

In addition, the electronic display sheet and the electronic display board are such that the flexible printed wiring board and the electronic device mounted therein can flexibly cope with external pressure such as bending, impact, vibration, and drop. Since it is constructed and mounted, it is easy to handle with little damage or failure.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific structure of the present invention will be described in detail according to an embodiment shown in the accompanying drawings. FIG. 1 is a perspective view showing an example of the electronic display sheet of the present invention, and FIG. 2 is a schematic sectional view taken along line AA in FIG.

In the electronic display sheet 1 of the present invention, the flexible printed wiring board 100 on which devices such as the light emitting element 4, the capacitor, the resistor and the switch are mounted, and the power source component 200 including the solar cell are flexible. The sheet member 3 made of resin is airtightly covered.

The flexible printed wiring board 100 may be replaced by a wiring board made of a hard material, but a flexible printed wiring board that flexibly responds to bending and external pressure is preferable.

Of the surface of the sheet member 3, a part of the surface is raised, and at least this portion is colored and printed with an arbitrary picture / character 10 and the like.
a has translucency.

A large number of light emitting elements 4 mounted on the substrate 200 are arranged inside the raised portion 3a, and the internal structure will be described later.

In this way, the picture, character, etc. 1
The part in which 0 is printed is displayed in these print colors in the daytime, and is clearly displayed in the nighttime by light emission from the inside through the print color.

The electronic display sheet 1 shown in the figure is merely an example, and its size, shape, and picture / character pattern are not limited, and for example, a large size that can be rolled up is convenient for carrying. It may be something like a display board.

For example, if the electronic display sheet 1 has a specification as a sticker that can be attached to the inside of the rear window of an automobile and visible from the rear, the electronic display sheet 1
The edge of the surface of the car may be slightly raised so that it can be adsorbed to the glass surface, and if the specifications are such that it can be attached to the outer surface of the car body, the back surface can be attached with double-sided tape or adhesive. May be.

If the electronic display sheet 1 is designed to be used as an accessory for a key holder,
The electronic display sheet 1 becomes small, and the light emitted from the electronic display sheet 1 makes it possible to easily find a key dropped on a dark road or the like, and at night, it can be easily illuminated by illuminating the position of a keyhole of a car. it can.

Although not shown, a flexible printed wiring board on which various electronic devices are mounted can be provided inside the resin plate. In this case, the sheet member 3 shown in FIGS. Replaces resin plate. Specifically, the printed wiring board is housed by sandwiching the printed wiring board in a resin board of two pieces that forms a space in the shape of a flexible printed wiring board on which various electronic devices are mounted, and the resin board of the two pieces is bonded. It is completed by doing.

A method of mounting the various light emitting elements 4, capacitors, resistors, switches, microcomputers and other devices on the flexible printed wiring board 100 will be described.

FIG. 3 is a perspective view showing a flexible printed wiring board 100 housed in the electronic display board of the present invention, and FIG. 4 and FIG. 5 both mount the light emitting element 4 on the flexible printed wiring board 100. It is a front sectional view showing a technique.

As shown in FIGS. 3 to 5, in the flexible printed wiring board 100, conductive pattern layers 101 and 102 are formed on the upper and lower surfaces of the flexible insulating layer 104, and the conductive pattern layers 101 and 102 are formed. Is made by twisting ultrafine copper wires into a single thread and knitting it like a cloth to improve responsivity to expansion and contraction and bending.
This is formed into a pattern having a required shape.
Flexible insulating layers 103 and 105 are formed on the upper and lower surfaces of the conductive pattern layers 101 and 102.

A series of holes 110 and 111 extending from the insulating layer 103 to the insulating layer 105 on the lower surface are formed at appropriate places on the upper surface of the substrate 100.
The base portion of the electronic device described later is inserted into 0 and 111.

Various electronic devices including the light emitting element 4 have a rivet shape, and in the case of the light emitting element 4, a light emitting member such as a light emitting diode (not shown) is provided in the head 4a thereof.
The terminal P1, which is one of the connection terminals of the light emitting member, is provided with the retaining locking piece 9 protruding from the side surface of the cylindrical or columnar leg portion 4b protruding to the back side of the head. The other terminal P2 is connected to the head 4a.
It is formed in a wheel plate shape centering on the leg portion 4b of the back surface of the.

To mount the light emitting element 4 on the flexible printed wiring board 100, the leg portion 4b of the light emitting element 4 is inserted into the opening 111, and the wheel-shaped terminal P2 is contacted with the upper conductive pattern layer 101. The terminal P1 made of the retaining locking piece 9 is made to face and projectingly locked in the lower conductive pattern layer 102 for connection. The retaining locking piece 9 has an outward biasing force, and when the leg 4b is inserted into the opening 111, the retaining locking piece 9 is pushed back inward, but When protruding into the lower conductive pattern layer 102, the light emitting element 4 cannot be pulled out.

Moreover, since the conductive pattern 101 is braided and has elasticity, the light emitting element 4 does not grind. Due to the flexible printed wiring board 100 being made of a flexible material, the conductive pattern 101 is braided to have an elastic force, so that an external pressure caused by a fall, a vibration, or the like is mitigated. .

The two terminals P1 and P2 are connected to the wiring board 10.
Even if the substrate 100 is positioned above and below 0, the distance between the terminals P1 and P2 does not change even if the substrate 100 is bent or twisted. Therefore, the light emitting element 4 and its terminal connection portion are damaged or have a contact failure. Does not cause

Of the electronic device, the head portion 4a of the light emitting element 4 is covered with a protective cover 5 having a lens surface 5a for enlarging light emission formed on the upper surface, and the protective cover 5 is flexible printed together with the head portion 4a. Opening 11 formed in insulating layer 103 forming the upper surface of wiring board 100
It fits within 0.

Although not shown, other electronic devices are also fitted in the openings (neither shown) formed in the flexible printed wiring board 100 in the same manner, so that the electronic device is mounted on the upper surface of the flexible printed wiring board 100. Does not tend to project in bulk.

In this way, the entire outer surface of the flexible printed wiring board 100 on which various electronic devices are mounted is
As described above, it is covered in an airtight state with a flexible resin sheet or resin plate.

[0039]

According to the electroluminescent display sheet of the present invention described above, the light emitting element is arranged inside the sheet or the resin plate along the picture / character formed on the resin plate surface. In the daytime, this picture / character can be displayed by colored printing or the like, and in a dark place such as at night, this part can be brightly displayed electronically.

For this reason, any specified picture on this surface
It can be used as a message board where characters can be seen not only in the daytime but also at night, as a signboard, a display board, a guide board, a light switch for equipment, and as an accessory to a key chain. It can be used as a flexible sticker that can be attached to automobiles, etc.

Further, in the electronic display sheet and the electronic display board of the present invention, the printed wiring board loaded therein has flexibility, and the devices have the rivet shape and the legs thereof are the wiring board. Since it is mounted by being inserted into the opening of the device, the response to bending, vibration, dropping, etc. can be improved, and the failure of these electroluminescent display sheet and electroluminescent display plate can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an electronic display sheet of the present invention.

FIG. 2 is a schematic sectional view taken along line AA in FIG.

FIG. 3 is a perspective view showing a flexible printed wiring board housed in an electronic display board.

FIG. 4 is a front sectional view showing a method of mounting the light emitting element 4 on a flexible printed wiring board.

FIG. 5 is a front cross-sectional view showing a method of mounting the light emitting element 4 on a flexible printed wiring board.

[Explanation of symbols]

 1 electronic display sheet 3 sheet member 3a raised portion 4 light emitting element 5 protective cover 5a lens surface 10 portion on which pictures and characters are drawn 20 electronic display board 100 flexible printed wiring board 200 power supply component

Claims (3)

[Claims] 1. A flexible printed wiring board on which electronic devices such as a rivet-shaped light emitting element, a capacitor, a resistor, and a switch are mounted is covered with a resin sheet member molded in an arbitrary shape. And electronic display sheet. 2. A light emitting display sheet, characterized in that a flexible printed wiring board on which electronic devices such as a rivet-shaped light emitting element, a capacitor, a resistor, a switch, etc. are mounted is provided inside a resin plate. 3. The light emitting device is arranged along characters, pictures, patterns, etc. drawn on the sheet member and the resin plate,
The electronic display sheet according to claim 1 or 2, wherein characters, pictures, patterns, and the like are configured to be electrically illuminated.