JP2008107370A - Alternating led lighting unit for display device and display device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a sign display device capable of being used for an advertisement or the like by using an alternating LED (Light Emitting Diode) lighting unit, which is inexpensive, can be mass-used, is suitable to be used in cost and management, suitable for the use in the management. <P>SOLUTION: The alternating LED lighting unit for the sign display device is obtained by connecting a power supply terminal, a rectifier, a capacitor, one or a plurality of light emitting diodes to a printed circuit board to form an alternating light emitting diode lighting circuit set, housing the set in a synthetic resin case and filling it with a synthetic resin insulating material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention uses a light emitting diode (hereinafter referred to as “LED”) lighting circuit, is lighted with high efficiency by an AC power source, and is used for display lighting such as advertisements and billboards. Therefore, the present invention relates to an AC LED lighting unit for a display device that is lit with high brightness and has electrical withstand voltage, vibration resistance, and waterproof properties, and a display device using the same.

  Conventionally, a signage illuminator using LEDs requires a DC power source for lighting driving, and has been an obstacle to the widespread use of illuminators using LEDs in terms of management, price and guarantee. Moreover, the structure conventionally used has low electrical withstand voltage and waterproofness.

In addition, an AC power source, a rectifier, a current adjustment circuit, a resistor, and an LED are connected in series, and a voltage applied to the resistor is fed back as a control signal of the current adjustment circuit, thereby the LED. There has been proposed an AC LED lighting circuit for a sign display device in which the current flowing in the is constant.
JP-A-2004-93657

  In the prior art, since the signboard illuminator using LEDs requires a large amount of use at a low cost, there are various problems in terms of management, price, and guarantee, and the conventional electrical withstand voltage and Since the usage method which may be low in waterproofness is common, there are various problems as a light source for lighting such as a signboard which must satisfy the above requirements.

  This invention connects the power supply terminal of the printed circuit board, rectifier, capacitor resistor, and one or more LEDs to make an LED lighting circuit set for alternating current, making use of the characteristics of the light emitting diode, price, calorific value, luminance In order to solve the above-described problems, an AC LED lighting unit for a display device was simply obtained, and the conventional problems were solved.

  Further, by connecting a large number of the lighting units in series, a current value necessary for securing the luminance of the LED can be obtained without generating heat in the circuit member, and the problems of heat generation and luminance can be solved and electrical insulation can be achieved. It succeeded in increasing the proof strength.

  That is, the present invention prints a lighting circuit on a printed circuit board, and connects a power terminal, a rectifier, a capacitor resistor, and one or a plurality of light emitting diodes to the circuit to form an AC light emitting diode lighting circuit set, which is synthesized. An AC LED lighting unit for a display device, which is housed in a resin case and filled with an insulating material in a gap. A circuit is printed on both the front and back surfaces of a long and narrow printed circuit board, and a light-emitting diode is formed on one circuit. Connect the resistors, capacitors and rectifiers to the circuits on the other side to make an AC light-emitting diode lighting circuit set, which is housed in a synthetic resin case and filled with an insulating material. It is the LED lighting unit for alternating current for the display device characterized.

  In another invention, a power supply terminal of a printed circuit board, a rectifier, a capacitor resistor, and one or a plurality of light emitting diodes are connected to form an AC light emitting diode lighting circuit set, which is accommodated in a synthetic resin case, and an insulating material is provided in a gap. Is a display device using an AC light-emitting diode lighting circuit, characterized in that a large number of AC light-emitting diode lighting units filled with are arranged in series and connected in parallel to a power source without dropping the voltage. A series of AC light-emitting diode lighting units that are connected to a power supply terminal of a printed circuit board, a rectifier, a capacitor resistor, and one or a plurality of light-emitting diodes to set an AC light-emitting diode lighting circuit, without reducing the voltage. LED lighting circuit for alternating current, characterized in that it is arranged and connected in a parallel, serial or serial and parallel fashion Is a display device had.

  According to the invention, since the LED lighting circuit of the printed circuit board having a large dielectric strength is set, accommodated in the synthetic resin case, and the gap is filled with the insulating material, a high dielectric strength can be obtained and the insulation resistance can be obtained. Therefore, connection of all circuits and other handling becomes easy, and workability is good.

  In the above, the AC LED lighting circuit set is accommodated in the synthetic resin case, but other means for enhancing the dielectric strength, such as insulation covering of the connection object, can be taken.

  According to the above invention, the light emitting circuit is unitized, so that lighting such as an advertising machine is rationalized, failure is reduced, repair and replacement are facilitated, and so on.

  According to this invention, since each lighting unit is connected in parallel to the power source, there is no risk of voltage drop even if a large number of LED light emitting circuits are connected, and there is an effect that all the necessary number of LEDs can be connected in practice. is there.

  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 advertising machine, etc. There is an effect that can be connected.

  Next, the main cause of heat generation in this kind of lighting circuit is heat loss due to the internal resistance of the capacitor. In the case of the present invention, the resistance value is extremely low, so there is no heat generation during lighting driving, and thermal expansion. There are various effects such as increasing the electric withstand voltage and greatly reducing power consumption.

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

  In this invention, the input and output terminals of the power supply, the required number of LEDs, rectifiers, capacitors and resistors are set on the surface of the printed circuit board on which the lighting circuit is printed on both sides, and this is accommodated in a synthetic resin case and placed in the gap. An AC LED lighting unit for display is configured by filling an insulating material such as silicon resin. Next, the display device of the present invention can be obtained by arranging the AC LED lighting unit at an appropriate place (a place where illumination is required) of a display device such as an advertising device and connecting it to a power source. That is, the installation and connection of the lighting unit is easy.

An embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. A total of five LEDs 3a, 3b, 3c, 3d, 3e (single) 3), and one end of each of the connection lines 6 and 6a is connected to the power input terminals 4 and 4 and the power output terminals 5 and 5, respectively, and the capacitor C and the resistors R ₁ and R are connected to the printed circuit. _{2. If} the full-wave rectifiers D ₁ and D ₂ are set and the printed circuit board 1 is accommodated in the synthetic resin case 7, the AC LED lighting unit 10 of the present invention can be obtained.

In the printed circuit of the embodiment, as shown in FIG. 1, a resistor R ₁ and a capacitor C are connected in series to the input line, and the resistor R ₂ and full-wave rectifiers D ₁ , D ₂ and LED 3 are connected. Are connected in parallel (in this case, the number of LEDs may be one or more).

  Since the LED lighting unit 10 according to the present invention has the above-described structure, the LED lighting unit 10 is strong against vibration and other external forces, has a large insulating property due to the synthetic resin case 7, and the transparent cover 8 can be used as necessary. In the figure, 22 is a silicon resin.

  The printed circuit board 1 of the embodiment is, for example, a square with a plane of 30 mm × 30 mm and is accommodated in the synthetic resin case 7, so that the whole is a square plate. Therefore, even if the LED 3 is set, the height is about 12 mm, so that it can be easily set even within a narrow advertising device.

  Also, as shown in FIG. 3, since the light emitting circuit is connected in parallel to the power supply, even if a large number of lighting units are arranged in series and connected (theoretically a large number of connections are possible), the voltage drops, etc. There is no danger of lighting problems.

  An embodiment of the present invention will be described with reference to FIG. 3. A display device 15 of the present invention can be obtained by arranging printed circuit boards 1 and 1 in series and connecting them with connecting lines 6 and 6, respectively. In the figure, 9 is an LED insertion hole, 13 and 14 are resistor installation positions, 16 is a capacitor installation position, and 17 is a rectifier installation position.

  In the above, if one connecting line 6 is connected to each terminal, the lighting device 11 is arranged in series as shown in the left diagram of FIG. 3B, and two or more connecting lines 6 and 6a are connected to one terminal. If it does so, it can be set as the illuminating device 12 paralleled like the right side in FIG.3 (b).

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

  An embodiment of the present invention will be described with reference to FIG. 4. A circuit 24 is printed on both the front and back sides of an elongated printed board 18, and LEDs 3, 3 are connected in series on the front side, and a resistor 25, The connector 19, the capacitor 20, and the rectifier 21 can be connected in order and stably installed. In the figure, reference numeral 22 denotes a silicon resin, to which the device and the case 23 are fixed.

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

  In this respect, the printed circuit and the installation area of the equipment are convenient, and lighting in a relatively narrow place is easy. Although there are various dimensions, for example, even with dimensions such as a width of 6 mm, a length of 60 mm, and a thickness of 2.6 mm, the LED and its lighting circuit can be set with a sufficient margin.

FIG. (A) The top view of a lighting unit similarly, (b) The front view which abbreviate | omitted one part. (A) The top view of the printed circuit board which similarly removed the instrument, (b) Explanatory drawing which similarly shows the example of a connection of a lighting unit. (A) A plan view of another embodiment, (b) a back view, and (c) an enlarged perspective view in which a printed circuit board is housed in a case.

Explanation of symbols

1 Printed circuit board 2 Lighting circuit 3 LED
4 Power input terminal 5 Power output terminal 6 Connecting line 7 Synthetic resin case 10 LED lighting unit for AC

Claims (4)

  A lighting circuit is printed on a printed circuit board, and a power supply terminal, a rectifier, a capacitor resistor, and one or more light emitting diodes are connected to the circuit to form an AC light emitting diode lighting circuit set, which is accommodated in a synthetic resin case. An alternating current LED lighting unit for a display device, wherein the gap is filled with an insulating material.   A circuit is printed on both the front and back sides of an elongated printed circuit board, a light-emitting diode is connected to the circuit on one side, and a resistor, a capacitor and a rectifier are connected to the circuit on the other side, respectively, to form an AC light-emitting diode lighting circuit set, An AC LED lighting unit for a display device, wherein the lighting circuit set is housed in a synthetic resin case and filled with an insulating material.   Connected to the power supply terminal of the printed circuit board, rectifier, capacitor resistor and one or more light emitting diodes to form an AC light emitting diode lighting circuit set, which is housed in a synthetic resin case and filled with an insulating material in the gap. A display device using an AC light-emitting diode lighting circuit, in which a large number of diode lighting units are arranged in series and connected in parallel to a power source without dropping voltage.   A series of AC light-emitting diode lighting units that are connected to a power supply terminal, rectifier, capacitor resistor, and one or more light-emitting diodes on a printed circuit board and set up an AC light-emitting diode lighting circuit without reducing the voltage. A display device using an AC LED lighting circuit, which is arranged in parallel or in series and in parallel.

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