JP2011003516A - Structure for led luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED luminaire solving a problem of: heat generating in an LED in operation; a problem of lighting even when no one is in the periphery and wasting power; and a problem of loss due to reflection and refraction at a protective cover that covers a light-emitting section of the LED luminaire.SOLUTION: The LED luminaire has a module having numerous LEDs of ten or more and less than 90 orderly and in series connected electrically in advance to a metal piece of copper plate stuck to a rectangular parallelepiped made by processing one piece of metal plate with regular and numerous small holes bored and having one side opened, using a double-sided tape with assured insulation. In addition, a case is manufactured by metal, heat discharging fins are provided on an outer periphery of the case. Furthermore, the LED luminaire is configured to have: a current switching circuit serially inserted to a switching power source; and the current switching circuit that provides normal brightness only when a person has approached the periphery. The switching of the current is carried out by a timer that starts by a far infrared ray sensor sensing the person approaching, and the current is supplied to the LED for reducing the brightness to that of standing by after a certain period.

Description

The present invention has a structure for effectively dissipating the heat generated by the LED lighted by the LED lighting device to the outside of the lighting device, ensuring high reliability of the LED lighting device, and the power source for lighting the LED is commercial. Directly rectify AC, drive 10 or more and less than 180 LEDs connected in series with DC voltage obtained through power factor correction circuit, incorporate human body sensing function through far-infrared sensor through current limiting circuit , Switch to normal brightness only when people approach, reduce to standby brightness when people are not around, reduce power consumption as lighting fixtures, and lose with the protective cover on the front of LED lighting fixtures It is a technology for the structure of an LED lighting fixture that reduces the loss of light due to reflection and refraction, and realizes a rational reduction in size and weight.

Problems to be solved by the invention

LEDs with high light output generate a large amount of heat, and a sufficient heat dissipation capability cannot be obtained with just the soldered pads of LEDs wired on a printed circuit board mainly composed of glass fiber. Equipment is needed. Conventionally, when a large number of LEDs are lit with commercial alternating current, the commercial alternating current is temporarily converted to a low direct current voltage corresponding to the LED, and a constant current is supplied from the direct current power source to the LED through a resistor. A power supply device for illumination was configured. Conversion loss occurs when the LED lighting power source is converted from commercial AC to low DC voltage. A structure that releases heat generated by conversion loss is required. In addition, since a resistor is used to limit the current flowing to the LED with a DC power supply, a structure for radiating heat generated in a circuit that limits the current supplied to the light emitting diode is an unavoidable problem. Also, from the viewpoint of a lighting fixture, power is wasted at normal brightness even when there are no people around the lighting fixture at night. Furthermore, the cover that protects the surface of the LED lighting apparatus causes a loss due to reflection and refraction of the irradiation light of the LED by the protective cover.

FIG.

FIG.

FIG.

Means 1 for solving the problem

The substrate on which high light output LEDs are placed is a part of a metal plate that is regularly cut into a large number of small holes, cut and bent into a rectangular parallelepiped with one open surface. An LED light-emitting module is configured in which an LED module in which a large number of LEDs are electrically connected in series in an orderly manner to a metal piece of a copper plate is attached to a large surface with a double-sided tape that ensures insulation.

Means 2 for solving the problem

The heat pipe heat receiving plate is composed of an elongated rectangular plane, and the heat pipe heat receiving plate is an LED module in which a large number of LEDs are electrically connected in series in an orderly manner to a metal piece of copper plate with a double-sided tape that ensures insulation. The affixed LED light-emitting module is configured, and the heat dissipation part of the heat pipe is exposed to the outside of the LED lighting fixture.

Means 3 for solving the problem

Since a high light output LED generates a large amount of heat, the case for housing the LED light emitting module and the power source is made of metal, and a metal radiation fin is attached to the outer periphery of the case of the LED lighting fixture.

Means 4 for solving the problem

The power source for supplying 10 or more LEDs connected in series to less than 180 LEDs directly improves the power factor and stabilizes the DC voltage through a DC power source obtained by directly rectifying commercial AC. The DC voltage to be stabilized is set to a voltage obtained by adding several volts required by the current limiting circuit in addition to a voltage value obtained by multiplying the number of LEDs by the forward voltage of the LEDs. The current limiting circuit includes a voltage stabilizing element and a fixed resistor for setting a current value. Immediately after the power is turned on, the LED lighting apparatus sets the brightness to the current value in the standby state. The current value switching circuit increases the current by connecting a parallel resistance of a fixed resistor for current setting. The circuit that increases the current connects the parallel resistor with the contact output of the timer that starts with the output of the human body sensor. After a certain period of time, the contact output is released, the current flowing through the LED is reduced, and the LED luminaire is reduced to the standby brightness.

Means 6 for solving the problem

The LED lighting apparatus performs mirror processing on the outer surface of the protective cover on the LED side. When changing the color tone to reflected light, the LED side surface of the protective cover is colored. In the place where the protective cover is processed, the reflector plate processing or the coloring processing is performed avoiding the portion where the LED is directly irradiated.

The invention's effect

The above means are realized by combining means according to the use environment according to the purpose of use according to the scale of the LED lighting apparatus. The heat generated by LEDs with high light output is about 10 times or more than that of popular type LEDs, and the heat dissipation on the conventional glass epoxy substrate is not sufficient for heat dissipation, and the temperature is limited by the manufacturer. Will be exceeded. However, when the present invention is applied, the heat dissipation of the LED can be efficiently performed, and the temperature rise of the LED can be appropriately suppressed. LED lighting fixtures that do not have people around them can reduce power consumption relative to the normal state in the standby state, and can suppress the LED temperature rise, so that the long-term life of the LED lighting fixtures can be expected, and The power consumption required for lighting can be reduced. In addition, when the LED protective cover was processed with a reflector on the LED side surface with respect to the outside of the luminaire, the illuminance was improved by 10% or more, and the use efficiency of the irradiated light of the LED was increased.

Best Mode for Carrying Out the Invention 1

Embodiments of the present invention will be described below.
The size of the heat-dissipating copper plate to be attached to the LED is determined by checking the degree of heat generation with a current flowing in advance. The LED is fixed on the template in advance so that it does not move in an orderly manner with the light irradiation surface of the LED facing down. The direction of the leads is aligned in a line with the polarities of the LEDs so that current flows in series after soldering. The copper plate is arranged so as to overlap the lead from the lower side of the LED. When the arrangement is finished, the both ends of the copper plate are fixed so as not to move, and the LED heat dissipation pad and the copper plate are first soldered. After that, the soldered parts of the heat dissipating pads are turned over, and the LED leads are soldered to the copper plate sequentially. After that, a single metal plate with a large number of small holes regularly cut and bent to form a rectangular parallelepiped with one open surface, ensuring insulation on the surface with the largest area outside the rectangular parallelepiped The rectangular parallelepiped for heat dissipation to which the double-sided tape is attached and the module in which the LED and the copper plate are soldered are combined.

Best Mode for Carrying Out the Invention 2

The heat pipe is a double-sided tape that has heat radiation fins corresponding to the heat dissipation power of the LED, the heat receiving plate of the heat pipe is a long and thin plane, and a module in which the LED and the heat dissipation copper plate are soldered to ensure insulation. Attach to the copper plate.

Best Mode for Carrying Out the Invention 3

LED lighting fixtures are manufactured with a metal case, and heat sinks are attached to the outer periphery of the metal case, and the heat of the air in the case that is heated by the heat generated by the LED is always passed through the metal case. Increase the contact area with the outside air that touches the surface to reduce the temperature rise in the case.

Best Mode for Carrying Out the Invention 4

Since LEDs are diodes, it is well known in practice and practically that there are no problems even if many are connected in series, so there are about 180 that do not require a large amount of light, and 180 that are simple in terms of safety. The necessary number of LEDs are used in series up to less than one, the copper plate connecting the LEDs is used as a current path, and the LED has a function as a heat radiating fin.

Best Mode for Carrying Out the Invention 5

The LED lighting power source directly rectifies commercial AC and uses a DC voltage obtained through a power factor correction circuit. The current limiting circuit is set by the value of a fixed resistor connected between the reference voltage terminal and the output terminal of the constant voltage control semiconductor. In the case of an LED lighting fixture that always lights with the same brightness, the reference voltage terminal and the output terminal are connected with a fixed resistor at a value that is the current value.
When a person approaches, the brightness is set in parallel with the value selected for the current value in the standby state, and a fixed resistor for obtaining an increasing current value for obtaining normal brightness is connected in parallel. In the case of an LED lighting fixture that always lights with the same brightness, the reference voltage terminal and the output terminal are connected with a fixed resistor at a value that is the current value.

Best Mode for Carrying Out the Invention 6

The plastic transparent cover has a high light refractive index, and the irradiation light near the outer peripheral side of the LED light having a wide irradiation angle is confined in the protective cover. In order to compensate for this defect, the reflector side of the LED side of the protective cover is processed with respect to the outside so that the front surface of the protective cover is effectively irradiated.

Is an example of an application circuit used at 12 volts provided by a light-emitting diode manufacturer. Is an example of an application circuit used at 12 volts provided by a light-emitting diode manufacturer. Is an example of an application circuit used at 5 volts provided by a light-emitting diode manufacturer. A rectangular parallelepiped made of metal with many regular small holes. The LED is connected in series with a small copper plate, soldering is completed, and the LED is attached to the radiator with double-sided tape. An elongated heat receiving plate and heat radiating fins before mounting a light emitting diode with a heat pipe. Appearance of metal LED lighting equipment with heat dissipation fins. The external appearance seen from the radiation fin side of the LED lighting fixture provided with the heat pipe. An example of a power supply device in which 40 LEDs are connected and connected in series with a human thermal sensor and a timer that is activated to set a standby state and normal brightness.

A Thin copper plate that doubles as a series connection of LED heat sink and LED.
B is a high light output LED.
C is a heatsink corresponding to the long and high light output LED of the heat pipe.
D is a double-sided tape with insulation ensured, copper plate, “before LED is mounted.
E is a heat pipe heat sink.
F is a heat radiating fin attached around the metal LED lighting fixture.
G is a plug for commercial alternating current of LED lighting equipment.
H is a power supply device from commercial AC that has a power factor correction circuit and a voltage stabilization function.
K is a constant voltage control semiconductor.
L is a circuit that switches between the standby state of the LED lighting apparatus and normal brightness.
M is a human body detection device using a far-infrared sensor.
N is a timer for determining the time for maintaining normal brightness from the standby state.
P is a far infrared ray emitted by the human body when a person approaches the vicinity of the LED lighting apparatus.
Q is a switch circuit for switching from the standby state of the LED lighting apparatus to normal brightness.
RB is a constant voltage semiconductor and transistor bias resistor RS1 is a resistor that sets a standby current to the LED.
RS2 is a resistor that increases current to normal brightness.

Claims (6)

A piece of metal plate with a regular number of small holes is partially cut and bent to form a rectangular parallelepiped with one open surface. A structure of an LED lighting apparatus having a light emitting module in which LEDs are arranged in series and electrically connected in series with a double-sided tape that ensures insulation. The heat receiving part is attached to a flat surface of a long and thin rectangular heat pipe, a module in which a large number of LEDs are orderly and electrically connected in series with a copper plate in advance, and a double-sided tape with insulating properties is attached to the heat pipe. The structure of an LED lighting fixture having a light emitting module exposed outside the LED lighting fixture case. The structure of the LED lighting fixture which makes the case which stores the light emitting module and power supply of an LED lighting fixture with metal, and has a radiation fin around the case. A large number of LEDs arranged in an orderly form a series of 10 or more and less than 90, and the size of the copper piece changes according to the power consumption of the LED, and the current for lighting the LED Structure of an LED lighting fixture having an LED lighting module configured as a conductor for connection. The switching power supply corresponding to the number of diodes connected in series to the LED lighting fixture is a non-insulated configuration with respect to the commercial power supply, and a current limiting circuit that can set two or more current values that can be used or not can be connected in series. In addition, it has a function to set the current flowing to the LED to a standard value for a certain period of time by a timer that is activated by a far-infrared sensor signal to switch the magnitude of the current, and after a certain period of time, it decreases to a standby current The structure of an LED luminaire incorporating a number of LEDs with a current control circuit. The transparent plastic plate that protects the surface of the LED is colored by the application in the direction of the light in a portion that avoids the direct light of the LED, or has a mirror reflection plate in the direction of the light, The direct light part is the structure of an LED lighting fixture with a transparent protective cover.

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