WO2011090230A1

WO2011090230A1 - Electronic card including a piezoelectric circuit for an led power source

Info

Publication number: WO2011090230A1
Application number: PCT/KR2010/000455
Authority: WO
Inventors: 강민수
Original assignee: Kang Min Soo
Priority date: 2010-01-25
Filing date: 2010-01-25
Publication date: 2011-07-28

Abstract

The present invention relates to an electronic card including a piezoelectric circuit for an LED power source, said electronic card comprising: a thin electronic circuit including an LED; a flexible printed circuit board including a piezoelectric circuit for supplying power to the electronic circuit; a transparent core resin layer formed on the flexible printed circuit board, and including a light guide pattern for guiding the light emitted by the LED to one side; and an upper cover layer formed on the transparent core resin layer, or relates to an electronic card that enables the light emitted by an LED to be transmitted even to an upper surface or lower surface of the card, so as to variously display one or more patterns selected from among characters, figures, pictures, trademarks and logos on various cards such as contact/contactless electronic cards, financial cards, transportation cards, RFID tag cards and national identification (NID) cards, and have excellent design effects and advertisement effects.

Description

Electronic card including piezoelectric circuit part for LED power supply

The present invention relates to an electronic card including a piezoelectric circuit unit for the LED power supply, and by applying the LED light-emitting effect to a variety of cards, such as contact or contactless electronic card, financial card, traffic card, RFID tag card, NID card (National Identification Card) In addition, the present invention relates to a technology capable of giving excellent design effects and advertisement effects.

Electronic cards include contact cards (ISO-7816 Contact IC Card) and contactless cards (ISO-14443 Type A / B Contactless Card or Remote Coupling Communication Card), as well as Magnetic Stripe Read (MSR) and Radio (RFID) Frequency Identification) card and tag (TAG; ISO-15963,15693).

The smart card chip (Smart Card Chip) of electronic card type which is developed and manufactured and used in various countries at home and abroad is equipped with an electronic card operating system (COS) based on a micro processor unit (MPU). It has its own computational functions, information storage functions (EEPROM, FRAM), secure encryption algorithms (DES, RAS, SEED, TDES), and input / output data ports (I / O). Especially, smart card chip is MPU of RISC (Reduced Instruction Set Computer) structure and is developed and used in 8bit, 16bit, 32bit format. Since the smart card semiconductor chip mounted on the electronic card has an operating system and application software on a hardware base, the usage information stored in the smart card can be utilized by an application program on a terminal or a computer that reads the electronic card.

In addition, semiconductors that form electronic cards developed at home and abroad are classified into Native, Open Flat Form (Java), Multi-os, WFSC, etc. according to the operating system. It can be classified into contactless or combi form. Since the smart card chip of the contactless electronic card is driven using radio frequency, two junction terminals are connected to the antenna at the back of the semiconductor chip to receive electromagnetic signals from the electronic card terminal and convert them into electrical signals required by the smart card.

In addition, by converting the information performed in the smart card into an electromagnetic signal to communicate with the terminal to update the information in the smart card. Since the contact electronic card is directly connected to the terminal and the smart card chip, information is exchanged and updated through necessary electrical signals and data communication through the connected terminal.

The existing electronic card developed in this way is provided to the system developer and developed into many applications, and is currently used in real life as a bank's credit card, transportation card, pass, membership card, etc. It is developed in the form of a tag and applied to a wide range of fields.

On the other hand, the above-mentioned electronic card may be used to obtain advertising effects or beautiful fashion effects in various media.

As part of the advertising effect, a case where the LED light-emitting thin film display module is embedded as a component element in a plastic card has emerged. However, the thin card should have a separate power supply for driving the LED light emitting display module, which is practically impossible. Electronic cards are manufactured in the form of cards or tags that can perform various functions in terms of utilization, and thus, when a light emitting display module is added, mixing and mounting problems with core components such as tags that have existed have not been solved. Because.

Therefore, after the LED light emitting display module is built in, power is supplied from the radio frequency conversion coil antenna so that the LED is emitted.

However, the volume of the frequency change coil is also not acceptable, and since the continuous light emitting effect cannot be obtained, its effectiveness is very poor. In addition, the reality is that it is difficult to produce the same form as the existing card in the range that does not exceed the minimum standard thickness of 0.76mm card.

The present invention has been made in view of the above necessity, LED embedded in an electronic card such as a credit card, LED by emitting light by using a thin piezoelectric circuit unit for converting mechanical energy into electrical energy, LED It is an object of the present invention to provide an electronic card including a piezoelectric circuit unit for an LED power source, which can be continuously applied, can be applied to an existing card form, and can form various light emitting patterns.

An electronic card according to an embodiment of the present invention is a flexible printed circuit board including a thin electronic circuit unit including an LED, a piezoelectric circuit unit supplying power to the electronic circuit unit, and the flexible printed circuit board. It is formed on the top, characterized in that it comprises a transparent core resin layer including a light guide pattern for guiding the emitted light of the LED to the side and an upper cover layer formed on the transparent core resin layer.

Here, the flexible printed circuit board or the upper cover layer is characterized in that it comprises a light emitting window for emitting light emitted from the LED, wherein the light emitting window is one or more patterns selected from letters, figures, pictures, trademarks and logos It is characterized by including.

In addition, the flexible printed circuit board, the core resin layer, and the upper cover layer may each include a polyvinyl chloride (PVC), a polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), polyethylene-modified polyethylene terephthalate (PET-G), and a PC (polyvinyl chloride). Polycarbonate) is characterized in that formed from one or more materials selected.

Next, the flexible printed circuit board further includes a lower cover layer provided on a rear surface of the electronic circuit unit or the piezoelectric circuit unit.

Next, the core resin layer is provided in the form of a light guide plate having grooves or through holes corresponding to the electronic circuit unit and the piezoelectric circuit unit, respectively, wherein the electronic circuit unit is an integrated circuit chip or an RF chip. And a radio frequency chip, wherein the flexible printed circuit board further includes an antenna connected to the RF chip.

Next, the piezoelectric circuit part is connected to the piezoelectric layer formed on at least one surface of the elastic substrate, a first electrode connected to the piezoelectric layer, a second electrode connected to the elastic substrate, and the first and second electrodes. Characterized in that it comprises a rectifying circuit, the piezoelectric circuit portion further comprises a capacitor for storing a current coming from the rectifying circuit, the elastic substrate is characterized in that formed of a metal or conductive plastic material, The piezoelectric layer includes Pb (Zr, Ti) O ₃ + Pb (Zn, Nb) O ₃ , Pb (Zr, Ti) O ₃ + Pb (Ni, Nb) O ₃ , Pb (Zr, Ti) O ₃ + PDFDF polymer, Pb (Zr, Ti) O ₃ + silicon polymer and Pb (Zr, Ti) O ₃ + epoxy polymer is characterized in that it is formed of at least one material. In this case, the piezoelectric layer may be formed of (Na, K) NbO ₃ -based or (Na, K, Li) NbO ₃ -based lead-free ceramic material.

The piezoelectric circuit unit may include a plurality of piezoelectric circuit units, and the flexible printed circuit board may further include a magnetic stripe (M / S) provided on a rear surface of the electronic circuit unit or the piezoelectric circuit unit.

In addition, the electronic card according to another embodiment of the present invention is a flexible printed circuit board including a thin electronic circuit unit including an LED, a piezoelectric circuit unit for supplying power to the electronic circuit unit, and the flexible printing The upper cover layer is formed on the circuit board to protect the electronic circuit unit and the piezoelectric circuit unit and the upper cover layer formed on the core resin layer, and the LED is emitted by the voltage generated in the piezoelectric circuit unit. And emitting light of the LED through at least one selected from the flexible printed circuit board, the core resin layer, and the upper cover layer.

Here, the at least one selected from the flexible printed circuit board, the core resin layer and the upper cover layer is characterized in that it comprises a light emitting window for emitting the LED light emission, the light transmission window is a letter, figure, picture, trademark And at least one pattern selected from a logo, wherein the core resin layer has a light-transmitting window on the entire side surface, and an emission light of the LED is provided in an area between the upper cover layer and the core resin layer. The flexible printed circuit board further comprises a light guide plate for inducing the electronic printed circuit board, wherein the flexible printed circuit board further includes a lower cover layer provided on a rear surface of the electronic circuit unit or the piezoelectric circuit unit. Further comprising a light guide plate in the area between the lower cover layer to induce the light emitted from the LED It is characterized by.

The present invention provides a new digital concept of an electronic card by incorporating a piezoelectric circuit portion and a high-brightness LED in a simple configuration of a conventional electronic card.

In particular, it is possible to produce excellent fashion effect by utilizing the financial card, transportation card, RF-ID tag card, NID card, etc., and increase the advertising effect by displaying various logos or trademarks.

In addition, the electronic card according to the present invention can follow the existing card standard and can be continuously supplied with a simple configuration, thereby providing an effect of improving the card manufacturing efficiency and increasing durability.

1 is an exploded perspective view showing an electronic card including a piezoelectric circuit unit for an LED power supply according to a first embodiment of the present invention.

2 to 4 are perspective views showing an electronic card according to the second to fourth embodiments of the present invention.

5 is an exploded perspective view showing an electronic card including a piezoelectric circuit unit for LED power supply according to a fifth embodiment of the present invention.

6 is an exploded perspective view showing an electronic card including a piezoelectric circuit unit for LED power supply according to a sixth embodiment of the present invention.

7 is a plan view showing a rear surface of an electronic card according to a seventh embodiment of the present invention.

8 is a cross-sectional view showing an electronic card including a piezoelectric circuit unit for the LED power supply according to the present invention.

9 and 10 are cross-sectional views showing the operating principle of the electronic card including the piezoelectric circuit unit for the LED power supply according to the present invention.

The present invention provides an electronic card including a piezoelectric circuit unit for an LED power supply to enable various light emitting patterns by using a thin high brightness LED and a thin piezoelectric circuit unit instead of using a conventional bulky LED light emitting display module. The main configuration of the present invention will be described below in detail with reference to the drawings and examples.

1 is an exploded perspective view illustrating an electronic card including a piezoelectric circuit unit for an LED power supply according to a first embodiment of the present invention. In general, the electronic card is provided with a cover layer on the top and bottom around the core layer. Among them, a circuit such as a semiconductor chip may be mainly inserted into the core layer or the lower cover layer, and the present invention uses a structure inserted into the lower cover layer.

Referring to FIG. 1, a flexible printed circuit board 100 including a thin electronic circuit unit 115 as a lower cover layer and a piezoelectric circuit unit 110 for supplying power to the electronic circuit unit 115 is provided. do.

Here, although the electronic circuit unit 115 only displays a predetermined region including the semiconductor chip 90 for identification, it means that the electronic circuit unit 115 is formed over the entire surface of the flexible printed circuit board 100. For example, the wires may include all wires connecting the LEDs 120 formed on the outer portion of the flexible printed circuit board 100 and wires connected to the piezoelectric circuit unit 110.

Next, the piezoelectric circuit unit 110 has a piezoelectric layer 50 formed on one surface of the elastic substrate 60 as a main component, and is a thin rectifier circuit rectifying the voltage generated through the piezoelectric layer 50 to make a constant current. And 70. In addition, a capacitor 80 capable of storing electrical energy by the generated current may be optionally included.

Here, the elastic substrate 60 is formed of a metal or a conductive plastic material, and serves to restore the shape of the piezoelectric layer and at the same time play an active role of transmitting voltage. The planar shape may be formed without various limitations, such as a rectangle and a circle, and may be formed in plural in a region allowed by the piezoelectric circuit unit 110. The piezoelectric layer 50 may be formed only on one surface of the elastic substrate 60 or both surfaces thereof, and the planar shape thereof preferably follows the shape of the elastic substrate 60. In this case, the piezoelectric layer 50 may include Pb (Zr, Ti) O ₃ + Pb (Zn, Nb) O ₃ , Pb (Zr, Ti) O ₃ + Pb (Ni, Nb) O ₃ , Pb (Zr, Ti) O ₃ It can be formed from one or more of + PDFDF polymer, Pb (Zr, Ti) O ₃ + silicon polymer, and Pb (Zr, Ti) O ₃ + epoxy polymer, and the recently developed (Na, K) NbO ₃ system or ( Na, K, Li) may be formed of a NbO ₃ -based lead-free ceramic material.

The above-described configuration of the electronic circuit portion and the configuration of the piezoelectric circuit portion are not limited to the illustrated form, but may be modified in various forms, all of which can be manufactured in a thin form using a semiconductor manufacturing technology.

The flexible printed circuit board 100 manufactured as described above has bending characteristics, and electrical energy is generated in the piezoelectric circuit unit 110 by the deformation of the flexible printed circuit board 100, and the electrical energy is led through the electrical circuit unit 115. Light 120 will be emitted.

In this case, the flexible printed circuit board 100 should simultaneously perform a function as a printed circuit board and a function as an outer cover layer of a plastic card having elasticity. Thus, polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC) are required. It is preferably formed of at least one material selected from polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PET-G), and polycarbonate (PC).

In addition, an IC chip (Integrated Circuit Chip, 90) or an RF chip (Radio Frequency Chip) may be mounted on the electric circuit unit 115 of the flexible printed circuit board 100. In the case of the RF chip, an antenna for receiving ) May be further included. In addition, a magnetic stripe (M / S) may be further formed on the rear surface of the flexible printed circuit board 100 on which the electric circuit unit 115 is mounted.

In the present invention, most of the functions for the electronic card function can be performed with the above configuration, and the following auxiliary configurations can be further added.

First, transparent PVC (Polyvinyl Chloride), PVDC (Polyvinylidene Chloride), PET (Polyethylene terephthalate), PET-G (Glycol-modified Polyethylene terephthalate) and the resin layer to protect the piezoelectric circuit unit 110 and the electric circuit unit 115 The core resin layer 130 formed of at least one of polycarbonate (PC) may be formed. The core resin layer 130 may be provided in the form of being applied to the flexible printed circuit board 100, but may also be provided in the form of a light guide plate including a protection region corresponding to each circuit unit as shown in FIG. 1. have. The core resin layer 130 may include grooves or through

holes

150, 155, and 160 corresponding to the piezoelectric circuit unit 110, the electric circuit unit 115, and the LED 120, respectively. In addition, the light guide pattern 170 may be further included to guide the emission of the light emitted from the LED 120 to the side.

Next, the upper cover layer 140 for protecting the front surface of the card is provided on the core resin layer 130. In this case, the material of the upper cover layer 140 may be formed of the same material as that of the flexible printed circuit board 100 or the core resin layer 130. In addition, design patterns of other cards may be formed on the upper cover layer 140, and an exposed area of the receiving circuit portion of the IC chip may be formed.

As described above, the electronic card according to the present invention forms an LED on the flexible printed circuit board, but incorporates a thin piezoelectric circuit part to maintain continuous light emission. The electronic card has a high frequency of bending and spreading due to its characteristics, and since pressure is always applied when stored in a wallet or the like, it is possible to maintain excellent light emission performance without a separate electric wave reception for a separate battery or power supply as in the prior art.

Accordingly, the electronic card according to the present invention may form a light emitting window on each of the flexible printed circuit board, the core resin layer, and the upper cover layer, thereby obtaining various light emitting effects and providing excellent visual effects.

Hereinafter, an embodiment according to the light emitting effect of the electronic card according to the present invention will be described.

FIG. 2 shows a second embodiment according to the present invention, and shows an embodiment in which light is emitted from the entire side of the electronic card 280 including the IC chip 275. The lower flexible printed circuit board 200 and the upper cover layer 240 are manufactured using opaque or translucent PVC, PVDC, PET, PET-G and PC, and the core resin layer 230 is formed of a transparent material. The side light emission effect can be emphasized by this. At this time, the reflective layer is formed on the interface between the lower flexible printed circuit board 200 and the core resin layer 230 or the interface between the core resin layer 230 and the flexible printed circuit board 200 or coated with a reflective paint to emit side light. The effect can be further improved.

3 shows a third embodiment according to the present invention, which shows an embodiment in which light is emitted from a portion of a side of an electronic card 380 including an IC chip 375. The upper cover layer 340 and the flexible printed circuit board 300 are configured in the same manner as in the second embodiment, and are formed by mixing the light transmission window 330b and the light shielding window 330a on sidewalls of the core resin layer 330. In this case, the light is emitted only at a part of the side surface. In this case, by further forming the light guide pattern 170 described above with reference to FIG. 1 in the light transmission window 330b, the light emission efficiency may be further improved.

FIG. 4 shows a fourth embodiment according to the present invention, which shows an embodiment in which light is emitted from an upper portion of an electronic card 480 including an IC chip 475. As shown in FIG. In this case, whether the side wall of the core resin layer 430 emits light may be selectively performed, and the same pattern as that of the second or third embodiment may be used.

In addition, the upper cover layer 440 is formed with at least one light emitting window (440a, 440b) selected from the characters, figures, drawings, trademarks and logos, so that the light emitted from the built-in LED can be variously represented.

In addition, the

light transmission windows

440a and 440b formed on the upper cover layer 440 may be similarly applied to the flexible printed circuit board 400.

In this way, various advertisement effects can be obtained by expressing various phrases, logos, and the like through the front or the rear of the card. In this case, by adding a separate light guide plate to the region between the upper cover layer 440 and the core resin layer 430, the phrase or logo may be emitted in a variety of patterns, specific embodiments thereof This will be described with reference to FIGS. 5 and 6.

5 is an exploded perspective view illustrating an electronic card including a piezoelectric circuit unit for an LED power supply according to a fifth embodiment of the present invention.

Referring to FIG. 5, an electronic card including a flexible printed circuit board 500, a core resin layer 530, and an upper cover layer 540 in a basic configuration is provided.

In this case, the light guide plate 575 including the light guide patterns 570 capable of inducing light emitted from the LED 520 may be further included in an area between the core resin layer 530 and the upper cover layer 540. In addition, the light emitting pattern such as a logo or a phrase (not shown) formed on the upper cover layer 540 may be further highlighted, or the side light emission of the card may be more prominent.

Here, two

piezoelectric circuit parts

510a and 510b included in the flexible printed circuit board 500 are arranged in order to express the embodiments according to the present invention in various ways, and the LED 520 is illustrated in the center portion. . However, the present invention is not limited thereto, and more

piezoelectric circuit parts

510a and 510b and LEDs 520 may be arranged within the allowable area of the card, and an electronic circuit part (not shown) in the area therebetween. These can also be arranged in various patterns.

In addition, when the light is also emitted to the lower flexible printed circuit board 600, that is, when a logo or a character is represented on the back of the card, as shown in FIG. 6, a separate lower cover layer and a light guide plate may be used. It may be.

6 is an exploded perspective view illustrating an electronic card including a piezoelectric circuit unit for an LED power supply according to a sixth embodiment of the present invention.

Referring to FIG. 6, first, the upper cover layer 640, the core resin layer 630, and the flexible printed circuit board 600 are formed by combining appropriate embodiments among the above-described first to fifth embodiments.

In this case, in order to display the light emitting pattern on the rear surface of the flexible printed circuit board 600, it is preferable to further form a separate lower cover layer 605 having a light transmitting window such as a logo. In this case, in order to further diversify the light transmitting pattern, a separate light guide plate 695 may be further formed in an area between the flexible printed circuit board 600 and the lower cover layer 605.

In addition, the completed bottom emission effect may appear as shown in FIG. 7 below.

7 is a plan view showing the back of the electronic card according to the seventh embodiment of the present invention.

FIG. 7 illustrates a lower cover layer 700 representing a rear surface of an electronic card according to the present invention, and the magnetic stripe 720 or signature column 710 included in a general plastic card is formed on a surface of the lower cover layer 700. It may be included, one side is provided with a light transmission window 730 indicating a logo, to achieve an excellent advertising effect using light emission.

As described above, the electronic card according to the present invention can obtain a light emitting effect by the bending characteristic shown in FIGS. 9 and 10 in a general state as shown in FIG. 8 below, by using electric energy stored in the piezoelectric circuit unit. A continuous luminous effect can be obtained.

8 is a cross-sectional view of an electronic card including a piezoelectric circuit unit for an LED power supply according to the present invention.

FIG. 8 illustrates a state in which the piezoelectric circuit portion 810 and the electronic circuit portion 815 are three-dimensionally provided on the flexible printed circuit board 800, and

grooves

850 and 855 are provided in the core resin layer 830 to protect the circuit portions. ) Shows the state formed. Accordingly, the side or up / down light emission effects may be appropriately used according to the first to seventh embodiments.

9 and 10 are cross-sectional views illustrating the operating principle of an electronic card including a piezoelectric circuit unit for an LED power supply according to the present invention.

9 and 10 illustrate a state in which the piezoelectric circuit unit 810 is bent, but the present invention is not limited thereto, and the pressure is transmitted through the upper cover layer 840 or the lower flexible printed circuit board 800. Electric pressure can be produced sufficiently even by the pressure applied, and excellent light emitting effect can be obtained by using such electric energy.

As described above, the present invention uses a thin piezoelectric circuit unit that incorporates LEDs into electronic cards such as financial cards, transportation cards, RF-ID tag cards, NID cards, and credit cards, and converts mechanical energy into electrical energy. By driving the LED, it is possible to produce an excellent fashion or visual effect, and by displaying various logos or trademarks can also increase the advertising effect. In addition, the electronic card according to the present invention can improve the card manufacturing efficiency by using a thin piezoelectric element, it can follow the existing card standard. In addition, the power supply can be continuously provided, thereby increasing the life of the card, and also increases the durability.

Claims

A flexible printed circuit board including a thin electronic circuit unit including an LED and a piezoelectric circuit unit to supply power to the electronic circuit unit;

A transparent core resin layer formed on the flexible printed circuit board, the transparent core resin layer including a light guide pattern guiding the light emitted from the LED to the side surface; And

And an upper cover layer formed on the transparent core resin layer.
The method of claim 1,

The flexible printed circuit board or the upper cover layer is an electronic card, characterized in that it comprises a light emitting window for emitting light emitted from the LED.
The method of claim 2,

And the floodlight window comprises one or more patterns selected from letters, figures, drawings, trademarks and logos.
The method of claim 1,

The flexible printed circuit board, the core resin layer, and the upper cover layer may be a polyvinyl chloride (PVC), a polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PET-G), and polycarbonate (PC), respectively. Electronic card, characterized in that formed from one or more selected materials.
The method of claim 1,

The flexible printed circuit board further comprises a lower cover layer provided on a rear surface of the electronic circuit unit or the piezoelectric circuit unit.
The method of claim 1,

The core resin layer is provided in the form of a light guide plate having a groove or a through hole corresponding to the electronic circuit portion and the piezoelectric circuit portion, respectively.
The method of claim 1,

The electronic circuit unit is characterized in that it comprises an IC (Integrated Circuit Chip) or RF chip (Radio Frequency Chip).
The method of claim 7, wherein

The flexible printed circuit board further comprises an antenna connected to the RF chip.
The method of claim 1,

The piezoelectric circuit unit includes a piezoelectric layer formed on at least one surface of the elastic substrate, a first electrode connected to the piezoelectric layer, a second electrode connected to the elastic substrate, and a rectifying circuit connected to the first and second electrodes. Electronic card characterized in that.
The method of claim 9,

The piezoelectric circuit unit further comprises a capacitor for storing a current from the rectifier circuit.
The method of claim 9,

The elastic substrate is an electronic card, characterized in that formed of a metal or conductive plastic material.
The method of claim 9,

The piezoelectric layer includes Pb (Zr, Ti) O 3 + Pb (Zn, Nb) O 3 , Pb (Zr, Ti) O 3 + Pb (Ni, Nb) O 3 , Pb (Zr, Ti) O 3 + PDFDF polymer, Pb (Zr, Ti) O 3 + silicone polymer and Pb (Zr, Ti) O 3 + the electronic card characterized in that the formation of one or more materials of the epoxy polymer.
The method of claim 9,

The piezoelectric layer is an electronic card, characterized in that formed of (Na, K) NbO 3- based or (Na, K, Li) NbO 3- based lead-free ceramic material.
The method of claim 1,

The piezoelectric circuit unit is characterized in that a plurality of electronic cards are provided.
The method of claim 1,

The flexible printed circuit board further comprises a magnetic stripe (M / S) provided on the rear surface of the electronic circuit portion or the piezoelectric circuit portion.
A flexible printed circuit board including a thin electronic circuit unit including an LED and a piezoelectric circuit unit to supply power to the electronic circuit unit;

A core resin layer formed on the flexible printed circuit board to protect the electronic circuit unit and the piezoelectric circuit unit; And

The upper cover layer is formed on the core resin layer, the LED is emitted by the voltage generated from the piezoelectric circuit portion, and the light emitted from the LED is the flexible printed circuit board, the core resin layer and the upper side Electronic card, characterized in that provided to be emitted through at least one selected from the cover layer.
The method of claim 16,

The at least one selected from the flexible printed circuit board, the core resin layer and the upper cover layer comprises a light emitting window for emitting the LED light emission.
The method of claim 16,

And the floodlight window comprises one or more patterns selected from letters, figures, drawings, trademarks and logos.
The method of claim 16,

The core resin layer is an electronic card, characterized in that it has a light transmission window on the entire side.
The method of claim 16,

The region between the upper cover layer and the core resin layer further comprises a light guide plate for inducing the light emitted from the LED.
The method of claim 16,

The flexible printed circuit board further comprises a lower cover layer provided on a rear surface of the electronic circuit unit or the piezoelectric circuit unit.
The method of claim 21,

And a light guide plate inducing a light emitted from the LED in an area between the flexible printed circuit board and the lower cover layer.