WO2006082970A1

WO2006082970A1 - Alternating light emitting diode lighting unit for display device and display device using same

Info

Publication number: WO2006082970A1
Application number: PCT/JP2006/302006
Authority: WO
Inventors: Masakazu Miura; Mitsuo Sasaki
Original assignee: Art Planning Service Co., Ltd.
Priority date: 2005-02-04
Filing date: 2006-02-06
Publication date: 2006-08-10
Also published as: JP2008107370A

Abstract

[PROBLEMS] To provide an alternating LED lighting unit for display device, by which direct lighting at high efficiency with an alternating power supply (commercial power supply) is made possible by using a light emitting diode lighting circuit, and a display device using such unit. [MEANS FOR SOLVING PROBLEMS] An alternating LED lighting unit for display device is provided by storing a LED lighting circuit in a case made of a synthetic resin. An alternating LED lighting circuit is printed on a printed board, and a commercial power supply input terminal, a resistor, a capacitor, a rectifier and one or a plurality of LEDs are connected. The LED is arranged on one side of the printed board, and the commercial power supply input terminal and the like are arranged on the other side. A space between the printed board on a side whereupon the commercial power supply input terminal and the like are arranged and the synthetic resin case is filled with an insulating material.

Description

Specification

AC light emitting diode lighting unit for display device and display device using the same

Technical field

The present invention relates to a display device using a light emitting diode (hereinafter referred to as “LED”) lighting circuit, for example, an advertising lighting device and a signboard lighting device. In particular, for display devices (advertising illuminators, signage illuminators) that are lit with high efficiency by an AC power supply, the materials used are lit with high brightness without causing high-temperature heat generation. The present invention relates to a display device with the characteristics and the LED lighting unit for AC used in this display device.

Background art

[0002] Conventionally, a signboard illuminator using LEDs requires a DC power source for lighting driving, and has been a major obstacle to the spread of illuminators using LEDs in terms of management, price, and guarantee. Moreover, the structure used conventionally has a low electrical withstand voltage and waterproofness.

[0003] Note that JP 2004-93657 A discloses an AC power supply, a rectifier, a current adjustment circuit, a resistor, and an LED connected in series, and the voltage applied to the resistor is controlled by the current adjustment. There has been proposed an AC LED lighting circuit for a signboard display device in which the current flowing through the LED is made constant by feeding back as a circuit control signal.

Disclosure of the invention

Problems to be solved by the invention

[0004] In the above-mentioned conventional technology, the LED signboard illuminator is required to be used in large quantities at a low cost, and thus has various problems in terms of its management, price, and guarantee. In the past, a method of use in which electrical withstand voltage and waterproofness may be low has been common. Therefore, it has been difficult to use conventional LED signage illuminators for signboards that require high electrical withstand voltage and waterproofness.

[0005] Therefore, the present invention provides an AC LED lighting unit for a display device, which can be directly lit with high efficiency by an AC power source (commercial power source) using an LED lighting circuit, and the same. The purpose is to propose a display device. [0006] Further, it is possible to illuminate with high brightness without causing high-temperature heat generation in the members being used, and to illuminate an alternating current LED for a display device having excellent electrical withstand voltage and waterproofness. It aims at proposing the unit and the display apparatus using the same. Means for solving the problem

In order to achieve the above object, the present invention provides an AC light-emitting diode lighting unit for a display device in which an AC light-emitting diode lighting circuit is housed in a synthetic resin case, The diode lighting circuit is printed on a printed circuit board, and also has a circuit power to which a commercial power input terminal, a resistor, a capacitor, a rectifier, and one or more light emitting diodes are connected. Light emitting diodes on the other side, commercial power input terminals, resistors, capacitors, and rectifiers on the other side, and the printed circuit board on the side where the commercial power input terminals, resistors, capacitors, and rectifiers are installed An AC light emitting die for a display device, wherein a gap between the case and the synthetic resin case is filled with an insulating material (for example, silicon resin) It proposes a over de lighting unit.

[0008] Here, in the above-described AC light emitting diode lighting unit for a display device, printed on a printed circuit board, and connected to a commercial power input terminal, a resistor, a capacitor, a rectifier, and one or a plurality of light emitting diodes. The AC light-emitting diode lighting circuit consisting of the above-mentioned circuit charges and discharges a capacitor through a resistor with an alternating current input from a commercial power input terminal, It is possible to use a single rectifier to rectify the current required for lighting the light emitting diode in both cycles.

In order to achieve the above object, the present invention is an AC light emitting diode lighting unit for a display device, in which an AC light emitting diode lighting circuit is housed in a synthetic resin case, The AC light-emitting diode lighting circuit is printed on a printed circuit board, and the circuit power is also connected by connecting a fuse, surge absorber, bridge diode, and capacitor between the commercial power input terminal and the rectified current output terminal. A circuit, printed on a printed circuit board, and in series with a circuit in which a power supply terminal is connected to the rectified current output terminal of the input circuit, one or a plurality of light emitting diodes, and a field effect transistor The lighting circuit to which the star terminal is connected is arranged in a row, or the lighting circuits are arranged in parallel in a plurality of rows, and the light emitting diode is arranged on one side of the printed circuit board and the other side. Commercial power supply input terminals, fuses, surge absorbers, bridge diodes, capacitors, field effect transistor terminals are provided, and commercial power input terminals, fuses, surge absorbers, bridge diodes, capacitors, field effect transistor terminals The present invention proposes an alternating current light emitting diode lighting unit for a display device, characterized in that an insulating material is filled in a gap between a printed circuit board and the synthetic resin case.

[0010] Further, in order to achieve the above object, the present invention provides a plurality of AC light-emitting diode lighting units for a display device in which an AC light-emitting diode lighting circuit is housed in a synthetic resin case. Or a display device connected in parallel or in series and in parallel, wherein the AC light-emitting diode lighting circuit is printed on a printed circuit board, and includes a commercial power input terminal, a resistor, a capacitor, a rectifier, and Or a circuit power to which a plurality of light emitting diodes are connected, and a commercial power output terminal connected to the commercial power input terminal for input to another AC light emitting diode lighting circuit. The AC light-emitting diode lighting unit for the display device is connected to a commercial power supply of the AC light-emitting diode lighting circuit in one lighting unit. Ru der proposes a display device characterized in that in which the terminal force other lighting units which are connected to the commercial power input terminal of the AC light emitting diode lighting circuit.

[0011] Here, the AC light-emitting diode lighting unit for each display device in the display device has a light-emitting diode on one surface side of the printed circuit board and a commercial power input terminal and a resistor on the other surface side. A capacitor, a capacitor, and a rectifier, and a gap between the printed circuit board on the side where the commercial power input terminal, resistor, capacitor, and rectifier are installed and the synthetic resin case is filled with an insulating material. Can be.

[0012] In addition, the AC light-emitting diode is turned on, which is printed on a printed circuit board and is connected to a commercial power input terminal, a resistor, a capacitor, a rectifier, and one or a plurality of light-emitting diodes. The circuit is an AC current input from the commercial power input terminal. The capacitor is charged / discharged through a resistor, and the capacitor charging / discharging current due to this charging / discharging is rectified by two rectifiers into the current required for lighting the light emitting diode in both cycles. it can.

Furthermore, in order to achieve the above object, the present invention is a display device comprising an AC light emitting diode lighting unit for a display device in which an AC light emitting diode lighting circuit is housed in a synthetic resin case. The AC light-emitting diode lighting circuit is printed on a printed board, and a fuse, a surge-absorber, a bridge diode, and a capacitor are connected between the commercial power input terminal and the rectified current output terminal. One or a plurality of light emitting diodes and a field effect transistor terminal are connected in series with an input circuit comprising: a circuit printed on a printed circuit board; and a power supply terminal connected to the rectified current output terminal of the input circuit. The lighting circuits are arranged in a row, or the lighting circuits are arranged in a plurality of rows in parallel. Light-emitting diodes on one side of the printed circuit board, commercial power input terminals, fuses, surge absorbers, bridge diodes, capacitors, and field effect transistor terminals on the other side, commercial power input terminals, fuses, surge absorbers, Proposed is a display device characterized in that an insulating material is filled in a gap between the printed circuit board on the side where a bridge diode, a capacitor, and a field effect transistor terminal are disposed, and the synthetic resin case. Is.

[0014] The above-described AC LED lighting unit for a display device of the present invention and a display device (for example, an advertising lighting device or a sign lighting device) using the same are connected to a circuit printed on a printed circuit board with a commercial power source. By connecting input terminals, resistors, capacitors, rectifiers, fuses, surge absorbers, bridge diodes, or single or multiple LEDs to form an AC LED lighting circuit, the characteristics of light-emitting diodes can be utilized, and the price and heat generation By solving various problems such as quantity and brightness, it was possible to light up with high brightness without causing high-temperature heat generation in the members used.

[0015] Further, when connecting the above-described components to a circuit printed on a printed circuit board, an LED is provided on one surface side of the printed circuit board, and a commercial power input terminal, a resistor, Allow other components, such as capacitors, to be deployed and contain the printed circuit board. Fill the gap between the synthetic resin case and other printed circuit board input terminals, resistors, capacitors, and other surfaces where other components are installed. As a result, the electrical withstand voltage and waterproofness can be increased.

In the above description, the AC LED lighting circuit is housed in the synthetic resin case. However, other means for enhancing the insulation resistance such as insulating the connection can be taken.

[0017] According to the above invention, the light emitting circuit is unitized to rationalize the lighting of the advertising device, reduce the failure, and facilitate the repair and replacement. .

The invention's effect

[0018] According to the present invention, an AC LED lighting unit for a display device, which can be directly lit with high efficiency by an AC power source (commercial power source) using an LED lighting circuit, and the same are used. A display device can be provided.

[0019] Further, it is possible to illuminate with high brightness without causing high-temperature heat generation in the member being used, and to turn on the LED for AC for a display device having an excellent electrical withstand voltage and waterproofness. A unit and a display device using the unit can be provided.

[0020] The main cause of heat generation of this type of lighting circuit is heat loss due to the internal resistance of the capacitor. However, in the present invention, the resistance value is extremely low. In addition to increasing the electrical withstand voltage that is not affected by thermal expansion, there are various effects such as a significant reduction in power consumption.

[0021] Further, the luminance of the LED depends on the capacitance of the capacitor, and there is an effect that the amount of light can be adjusted without generating heat in the material used.

[0022] In addition, since each lighting circuit is set on a printed circuit board and unitized, it can be handled by increasing the number of printed circuit boards even when it is used for a large-scale advertising machine, etc. There is an effect that a necessary number of circuits can be connected.

[0023] According to the present invention, each lighting unit is connected in parallel to the power source, and thus a large number of L

Even if an ED light-emitting circuit is connected, there is an effect that it is possible to connect all the LEDs necessary for practical use without fear of voltage drop.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Example 1

An embodiment of the present invention will be described with reference to FIGS. 1, 2 (a), (b), and FIGS. 3 (a), (b).

[0026] A total of five LEDs 3a, 3b, 3c at the four corners and the center of the front side of the printed circuit board 1 (upper side in Fig. 2 (b)) with respect to the circuit 2 printed on the printed circuit board 1. , 3d, and 3e (sometimes collectively referred to as “LED3”).

On the other hand, on the back side of the printed circuit board 1 (the lower side in FIG. 2 (b)), with respect to the circuit 2, the power input terminals 4, 4, the power output terminals 5, 5, a capacitor Cl, a resistor Rl, R2, full wave rectifier Dl, D

Connect 2 Also, one end of the connecting lines 6 and 6a is connected to the power input terminals 4 and 4 and the power output terminals 5 and 5, respectively.

The LED lighting circuit composed of the printed circuit board 1 configured in this manner was accommodated in the synthetic resin case 7. Then, as shown in FIG. 2 (b), the gap between the back side of the printed circuit board 1 and the synthetic resin case 7 is filled with a silicone resin 22 to obtain an AC LED lighting unit 10 of the present invention.

[0029] As described above, since the gap between the back side of the printed circuit board 1 to which the power input terminals 4, 4 and the like are connected and the synthetic resin case 7 is filled with the silicon resin 22, it is electrically insulated. The pressure resistance and waterproofness can be increased.

[0030] As shown in Fig. 1, the LED lighting circuit includes a resistor R and a capacitor C1 connected in series to the input line, and the resistor R and full-wave rectifiers D, D, and LED3 are connected in parallel. Connect to

2 1 2

(In this case, the number of LEDs can be single or multiple! /).

In FIG. 1, the parts indicated by reference numerals (1) and (2) are commercial power input terminals. For example, the commercial power terminal after the fuse is used. The part indicated by the symbols (3) and (4) is the load L. As a load, one or more light emitting diodes 3 are provided. The parts indicated by symbols (5) and (6) are commercial power output terminals. This commercial power output terminal is used for connection to the next AC LED lighting unit 10 to be connected. In FIG. 1, the symbol I indicates the light emitting diode lighting supply current.

[0032] Charge the capacitor C1 through the resistor R1 from the commercial power input terminals (1), (2) (use 100V AC for evaluation). This charging / discharging is performed through the load L. This charging / discharging current becomes a current source necessary for lighting the light emitting diode 3. In the circuit shown in Figure 1, rectifier D No. 1 is used for the purpose of obtaining a lighting current in both cycles of a capacitor charging / discharging current.

[0033] As described above, since the charge / discharge current generated in the capacitor C1 is used as the light-emitting diode lighting supply current, it is necessary to ensure the luminance of the light-emitting diode without generating heat in the member used, that is, the circuit member. Can be obtained. As a result, it is possible to achieve the purpose of suppressing the heat generation while obtaining the necessary luminance.

[0034] Since the LED lighting unit 10 according to the present invention has the above-described structure, the synthetic resin case 7 that is strong against vibration and other external forces has high insulation. A transparent cover 8 can be used if necessary.

[0035] Since the printed circuit board 1 of the embodiment has a square shape of, for example, 30 mm x 30 mm and is accommodated in the synthetic resin case 7, the whole is a square plate. Therefore, even if LED3 is set, it is about 12mm in height, so it can be easily set even in a narrow advertising device.

[0036] When a plurality of AC LED lighting units 10 of the present invention are connected, a connection form as shown in Fig. 3 (b) is possible. The parts indicated by reference numerals 10a, 10b, and 10c on the left side in FIG. 3 (b) are a plurality of parts connected in series. The part indicated by reference numerals 10d and 10e on the right side in Fig. 3 (b) is a plurality of units connected in series and parallel.

[0037] As shown on the right side of Fig. 3 (b), the LED lighting unit 10 for AC of the present invention can be connected in parallel with a light emitting circuit with respect to a power source. Therefore, even if a large number of lighting units are connected (in theory, a very large number of connections are possible), there is no risk of a voltage drop or other problems in lighting.

Example 2

An embodiment of the present invention will be described with reference to FIGS. 3 (a) and 3 (b). By arranging the printed circuit boards 1 and 1 in series and connecting them with connecting lines 6 and 6, respectively, the display device 15 of the present invention can be made. In Fig. 3 (a), the part indicated by reference numeral 9 is the LED insertion hole, the part indicated by reference numerals 13 and 14 is the resistor installation position, the part indicated by reference numeral 16 is the capacitor installation position, and the part indicated by reference numeral 17 is the rectifier installation. Position.

[0039] If one connecting line 6 is connected to each terminal, the lighting device 11 is arranged in series as shown in the left figure of Fig. 3 (b), and two or more connecting lines 6, 6a are connected to one terminal. If connected, right side in Fig. 3 (b) As shown in FIG.

[0040] Since the LED lighting unit is connected in parallel to the power source, there is no possibility that the voltage partially drops.

Example 3

An embodiment of the present invention will be described with reference to FIG. The circuit 24 is printed on both the front and back sides of the elongated printed circuit board 18, and LEDs 3 and 3 are connected in series on the front side, and resistor 25, connector 19, capacitor 20, and rectifier 21 are connected in sequence on the back side. It can be installed stably. In the figure, reference numeral 22 denotes a silicone resin, to which the device and the case 23 are fixed.

[0042] Since the printed circuit board of this embodiment is elongated, it is difficult to install each device on one side. If it is installed on both sides, there is a sufficient margin, so it can be installed reliably.

[0043] This point is convenient in terms of the printed circuit and the installation area of the equipment, and lighting in a relatively narrow place is easy. There are various dimensions, but it is possible to set the LED and its lighting circuit with sufficient margin even if the dimensions are, for example, width 6mm, length 60mm, thickness 2.6mm.

Example 4

[0044] Another embodiment of the present invention will be described with reference to FIGS. 5, 6A and 6B.

[0045] The AC LED lighting circuit of this embodiment includes an input circuit shown in Fig. 5 and a lighting circuit shown in Fig. 6 (a).

[0046] As shown in FIG. 5, the input circuit is printed on a printed circuit board (not shown). Between the commercial power input terminal T1 and the rectified current output terminal T2, a fuse Fl, a surge-absorber SG1, a bridge Diode BD1 and capacitor C1 are connected.

Thus, for example, an AC power supply 100V is connected to the commercial power input terminal T1, and a rectified (DC) voltage of about 140V is generated at the rectified current output terminal T2.

[0048] The lighting circuit is printed on a printed circuit board (not shown) as shown in FIG. 6 (a), and a power supply terminal (+ terminal, one terminal) is connected to the rectified current output terminal T2 of the input circuit shown in FIG. One or a plurality of light emitting diodes (LEDs) and a lighting circuit to which a field effect transistor terminal is connected are arranged in series or in parallel in a circuit connected to each other. In Fig. 6 (a), the part surrounded by a broken line is one lighting circuit, which is a single line or multiple lines. Several sequences are deployed in parallel.

[0049] The light emitting diode (LED) is lit by connecting the power supply terminals (+ terminal,-terminal) of the lighting circuit shown in Fig. 6 (a) to the rectified current output terminal T2 of the input circuit shown in Fig. 5. This comes out.

FIG. 6B illustrates details of the field effect transistor. The field effect transistor is used for constant current control to correct the current change value due to variations in the forward voltage drop characteristics of one or more LEDs in each lighting circuit.

[0051] The AC LED lighting unit of the present invention shown in FIGS. 5 and 6 (a) and 6 (b) is also provided with a light emitting diode on one side of the print substrate (not shown) and a commercial power input on the other side. Terminals, fuses, surge absorbers, bridge diodes, capacitors, and field effect transistors can be provided and housed in a synthetic resin case.

[0052] Then, an insulating material is filled in the gap between the printed circuit board on which the commercial power input terminal, fuse, surge absorber, bridge diode, capacitor, and field effect transistor terminal are disposed, and the synthetic resin case. The alternating current LED lighting unit can be used to make the display device of the present invention.

As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to such embodiments, and the technical scope in which the description power of the claims can be grasped. Can be changed to various forms.

Brief Description of Drawings

FIG. 1 is a diagram for explaining an example of a light-emitting diode lighting circuit according to the present invention.

[FIG. 2] (a) A plan view of a light-emitting diode lighting unit of the present invention, (b) a front view in which a part of the light-emitting diode lighting unit of the present invention is omitted.

[FIG. 3] (a) A bottom view corresponding to FIG. 2 (a) of the light-emitting diode lighting unit of the present invention, and (b) A diagram illustrating a configuration in which a plurality of light-emitting diode lighting units of the present invention are connected.

[FIG. 4] (a) A plan view illustrating another example of the light-emitting diode lighting circuit of the present invention, (b) FIG. 4 (a) a back view of the light-emitting diode lighting circuit shown in FIG. 4 and (c) FIG. 4 (a). (B) The expansion perspective view which abbreviate | omitted one part explaining the state in which the printed circuit board of illustration was accommodated in the case made from a synthetic resin.

FIG. 5 illustrates an input circuit in an AC LED lighting unit according to another embodiment of the present invention. Figure.

6A is a diagram for explaining a lighting circuit in an AC LED lighting unit according to another embodiment of the present invention, and FIG. 6B is a diagram for explaining details of a field effect transistor in the circuit of FIG. 6A. Explanation of symbols

1 Printed circuit board

2 Lighting circuit

3 LED

4 Power input terminal

5 Power output terminal

6 consolidation

7 Synthetic resin case

10 LED lighting unit for AC

Claims

The scope of the claims

[1] An AC light-emitting diode lighting unit for a display device in which an AC light-emitting diode lighting circuit is housed in a synthetic resin case,

The AC light emitting diode lighting circuit is printed on a printed circuit board and has a circuit power to which a commercial power input terminal, a resistor, a capacitor, a rectifier, and one or a plurality of light emitting diodes are connected.

A light emitting diode is provided on one side of the printed circuit board, and a commercial power input terminal, a resistor, a capacitor, and a rectifier are provided on the other side.

The gap between the printed circuit board on the side where the commercial power input terminal, resistor, capacitor, and rectifier are installed and the synthetic resin case is filled with an insulating material.

An AC light-emitting diode lighting unit for a display device.

[2] The AC light-emitting diode lighting circuit, which is printed on a printed circuit board and includes a commercial power input terminal, a resistor, a capacitor, a rectifier, and a circuit connected to one or more light-emitting diodes, A capacitor is charged / discharged through a resistor using AC current input from the commercial power supply input terminal, and the capacitor charge / discharge current generated by this charge / discharge is required to turn on the light-emitting diode in both cycles by two rectifiers. 2. The AC light-emitting diode lighting unit for a display device according to claim 1, wherein the LED light-emitting diode is rectified to a constant current.

[3] An AC light emitting diode lighting unit for a display device in which the AC light emitting diode lighting circuit is housed in a synthetic resin case,

The AC light emitting diode lighting circuit is:

A fuse, surge-absorber, bridge diode, and capacitor are connected between the commercial power supply input terminal and the rectified current output terminal printed on the printed circuit board!

A lighting circuit that is printed on a printed circuit board and in which one or a plurality of light-emitting diodes and a field effect transistor terminal are connected in series with a circuit in which a power supply terminal is connected to the rectified current output terminal of the input circuit. It is arranged in one row, or the lighting circuit is arranged in multiple rows in parallel. A light-emitting diode is provided on one side of the printed circuit board, and a commercial power input terminal, fuse, surge absorber, bridge diode, capacitor, and field effect transistor are provided on the other side.

Insulation is filled in the gap between the printed circuit board on the side where the commercial power input terminal, fuse, surge absorber, bridge diode, capacitor, and field effect transistor terminal are provided, and the synthetic resin case.

An AC light-emitting diode lighting unit for a display device.

[4] A plurality of AC light-emitting diode lighting units for display devices in which AC light-emitting diode lighting circuits are housed in a synthetic resin case are connected in series, in parallel, or in series and in parallel. A display device,

A commercial power output terminal connected to the commercial power input terminal and input to another AC light emitting diode lighting circuit;

The connection of the AC light emitting diode lighting units for the plurality of display devices is such that the commercial power output terminal of the AC light emitting diode lighting circuit in one lighting unit is connected to the AC light emitting diode lighting circuit in another lighting unit. Connected to the commercial power input terminal

A display device characterized by that.

[5] AC light-emitting diode lighting unit for each display device

The display device according to claim 4, wherein:

[6] The alternating current comprising a circuit printed on a printed circuit board and connected to a commercial power input terminal, a resistor, a capacitor, a rectifier, and one or more light emitting diodes. The light-emitting diode lighting circuit charges and discharges a capacitor through a resistor using an alternating current input from the commercial power input terminal, and the capacitor charge / discharge current due to this charging and discharging is performed in both cycles by two rectifiers. 6. The display device according to claim 4, wherein the current is rectified to a current necessary for lighting the light emitting diode.

A display device comprising an AC light emitting diode lighting unit for a display device, wherein the AC light emitting diode lighting circuit is housed in a case made of synthetic resin,

The AC light emitting diode lighting circuit is:

A lighting circuit that is printed on a printed circuit board and in which one or a plurality of light-emitting diodes and a field effect transistor terminal are connected in series with a circuit in which a power supply terminal is connected to the rectified current output terminal of the input circuit. It is arranged in one row, or the lighting circuit is arranged in multiple rows in parallel.

A light-emitting diode is provided on one side of the printed circuit board, and a commercial power input terminal, fuse, surge absorber, bridge diode, capacitor, and field effect transistor are provided on the other side.

A display device characterized by that.