JP2017098045A - LED lamp and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp capable of lighting at a suitable impedance regardless of a type of a stabilizer.SOLUTION: A lighting device 200 comprises: a lighting fixture 150; and a straight pipe type LED lamp 100 as an LED lamp attached to the lighting fixture. In the straight pipe type LED lamp 100, an LED current detection circuit 38 is provided. A current value detected by the LED current detection circuit 38 is stored to a memory device 39 or a memory device in a micro computer 42 before the LED lamp is provided at another place. When the current value detected by the LED current detection circuit 38 after the LED lamp is provided at another place is different from (higher than) the stored current value by, for example, 20% or more, the micro computer 42 resets a stored calibration value and performs a calibration for searching for a suitable impedance point with a stabilizer again.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED lamp and a lighting device.

LED lamps using LED (Light Emitting Diode) elements as light sources have been commercialized.
An existing lighting fixture for lighting a fluorescent lamp is used as it is without changing the structure of the ballast, and the LED lamp is turned on. Such an LED lamp is called a construction-less type.
In this type of LED lamp, a microcomputer is mounted in the lamp, and energy saving is ensured by performing optimum impedance control for each ballast connected.

In the impedance control described above, calibration is performed by searching for an optimum impedance point with a ballast connected at the first installation of the LED lamp, the result is stored, and the stored calibration value is stored in the next energization. By diverting, the calibration process was omitted.
Patent Document 1 discloses a technique for driving electronic components such as light-emitting diodes connected in series by supplying power and a control signal in order to solve the problem of separately controlling a large number of LEDs.

For example, when the user moves and connects the LED lamp to a ballast different from the ballast that has been used up to now, the LED lamp is lit with the stored calibration value.
In this case, since calibration corresponding to different ballasts is not performed, there is a problem that lighting with an optimum impedance cannot be performed and energy saving performance is inferior.

  The present invention has been made in view of such a current situation, and its main object is to provide an LED lamp that can be lit with an optimum impedance regardless of the type of ballast.

  In order to achieve the above object, the LED lamp of the present invention is calibrated to find the impedance point of the lamp body, the LED element disposed inside the lamp body, and the ballast provided in the lighting fixture. And a storage means for storing a result of calibration executed when the lamp body is electrically connected to the ballast, and the control means has a predetermined condition. The calibration result is reset and the calibration is executed again.

  ADVANTAGE OF THE INVENTION According to this invention, the LED lamp which can be lighted with the optimal impedance irrespective of the kind of ballast can be provided.

It is a circuit diagram of the illuminating device which concerns on the 1st Embodiment of this invention. It is a figure which shows the reset application method of the calibration in 2nd Embodiment. It is a disassembled perspective view of an illuminating device. It is a perspective view of the state where the cover of a straight tube form LED lamp was removed. It is a perspective view of the state where a part of a case of a straight tube type LED lamp was cut and a base was removed. It is a figure which shows the structure of a straight tube | pipe type LED lamp, (a) is a disassembled perspective view of the notch in one end part, (b) is a disassembled perspective view of the notch in the other end part. It is a figure which shows the mounting structure of a LED board, (a) is an exploded perspective view of one end part, (b) is an exploded perspective view of the other end part. FIG. 5 is a view of the straight tube LED lamp as viewed from the direction A in FIG. 4. FIG. 6 is an enlarged perspective view of a portion B in FIG. 5. It is principal part sectional drawing which shows the fixation structure of the power supply board with respect to the housing | casing by a clamp. FIG. 9 is a diagram corresponding to FIG. 8 in a modified example.

Embodiments of the present invention will be described below with reference to the drawings.
First, based on FIG. 3 thru | or FIG. 8, the basic structure of the straight tube | pipe type LED lamp and illumination device which concerns on this embodiment is demonstrated.
FIG. 3 is an exploded perspective view showing the appearance of the lighting device 200. The lighting device 200 includes a straight tube LED lamp 100 as an LED lamp, and a lighting fixture (lamp) 150 on which the straight tube LED lamp 100 is mounted.
The lighting fixture 150 is the same as a fixture for lighting a fluorescent lamp, and the terminals (4a to 4d) of the straight tube LED lamp 100 are inserted in accordance with the hole positions of the sockets 151a and 151b.
The commercial current flows from the terminals (4a to 4d) to the LED elements described later in the straight tube LED lamp 100, and the straight tube LED lamp 100 is lit.

The straight tube LED lamp 100 is mainly electrically connected to a rod-like (including flat and cylindrical concepts) housing 2, a cover 3 as a translucent and diffusive cover member, and a lighting fixture 150. The caps 1a and 1b are connectable to each other.
Here, the cover 3 is transparent. The diffusibility of the cover 3 may be imparted in shape by adding prism-like irregularities to the cover surface, or may be imparted by including a diffusing material.
When the diffusion material is included, the entire cover 3 may be formed of the diffusion material, or the diffusion material may be added or contained to impart diffusibility.

The casing 2 is formed in a semi-cylindrical shape (cylindrical shape) whose cross-sectional shape is substantially the same in the longitudinal direction (axial direction).
In order to improve the function of radiating heat generated inside, the outer surface of the housing 2 is provided with irregularities (see FIG. 8) to increase the surface area.
The housing | casing 2 is formed with the metal material with large heat conductivity. Due to the cylindrical shape, the casing 2 having a uniform cross-sectional shape can be manufactured at low cost by a processing method such as extrusion molding or pultrusion molding.

As the metal material, an aluminum alloy or a magnesium alloy is often used, but other extruded materials may be used.
The unevenness of the outer peripheral portion can provide a heat dissipation function similar to that provided with ribs or heat dissipation fins.
Here, for the purpose of improving heat dissipation, the outer periphery of the housing 2 is provided with irregularities. However, if the insulation between the housing 2 and a drive board (power supply board) and electrical components described later can be secured, the inner periphery Irregularities may be provided on the surface.

The cover 3 has an outer diameter (curvature) substantially the same as the outer diameter of the housing 2 and is formed in a semicircular shape having an opening along the longitudinal direction of the housing 2.
That is, the cover 3 has an arc-shaped cross-sectional shape and has a size that covers one side surface of the housing 2 in the longitudinal direction.
As shown in FIG. 8, the cover 3 is attached in such a manner that an edge 33 is fitted into an axially extending groove 21 provided on the outer surface of the housing 2, and the integral configuration with the housing 2 is a cylindrical shape. .
As shown in FIG. 3, the caps 1 a, 1 b are provided so as to cover the outer surfaces at both ends in the longitudinal direction of the lamp body, which is an integral configuration of the housing 2 and the cover 3.
As shown in FIG. 6, the bases 1 a and 1 b are equipped with terminals 4 a to 4 d that can be mounted on a lighting fixture (fluorescent lamp lighting fixture) 150 that can turn on a fluorescent lamp.

Current is supplied to the power supply substrate 7 via the terminals 4a to 4d of the caps 1a and 1b and lead wires 6a and 6b extending from the connector 16 connected to the caps 1a and 1b.
There is no problem even if the terminals 4a to 4d and the lead wires 6a and 6b are electrically connected by a method such as direct soldering.
The bases 1a and 1b are fixed to the housing 2 by a plurality of screws 5a to 5d, so that the housing 2 and the cover 3 fitted thereto are integrated so as to be integrated.

The bases 1a and 1b may be fixed to the housing 2 by means such as caulking instead of screwing. The shapes of the caps 1a and 1b are substantially the same as the caps located at both ends of the existing fluorescent lamp.
Therefore, an LED lamp illumination device can be configured without requiring replacement of the luminaire by attaching the straight tube LED lamp 100 to the existing luminaire using the fluorescent lamp instead of the fluorescent lamp. Can do.
Thereby, compared with the case where a new lighting fixture is separately attached, the facility cost and the construction cost can be greatly reduced, and the labor and time for replacement work can be reduced.

As shown in FIG. 8, an LED substrate as a mounting substrate is disposed outside the flat portion (a portion corresponding to a semicircular string) 32 of the housing 2 and inside the cover 3 so as to face the cover 3. 11 is fixed (supported) via a sheet 10 having adhesiveness.
The sheet 10 is preferably made of a material having good thermal conductivity (for example, a heat-dissipating silicone rubber) in order to easily transmit heat generated by the LED to the housing 2, that is, to promote heat dissipation.
The power supply substrate 7 is disposed inside the housing 2 along the inside of the flat portion 32.
As shown in FIG. 4, the LED board 11 is an elongated rectangular printed board, and includes an LED board 11a and an LED board 11b.

Corresponding to the divided configuration of the LED substrate 11, the sheet 10 is also divided in the longitudinal direction.
A plurality of LED elements 12a and 12b are mounted on the LED boards 11a and 11b at predetermined intervals in the longitudinal direction of the housing 2, respectively.
The LED element 12 is a semiconductor light emitting element light source having an EL (Electroluminescence) effect.

  As shown in FIG. 5, the power supply substrate 7 is formed in an elongated rectangular shape extending in the longitudinal direction of the housing 2, and a plurality of electronic components 9 for DC power conversion are spaced apart in the longitudinal direction on the mounting surface. It is installed.

The current rectified to direct current by the electronic component 9 is supplied to the mounting boards 11a and 11b through the lead wires 13a and 13b shown in FIG.
The LED boards 11a and 11b are electrically connected by lead wires or jumper wires (not shown).
In the present embodiment, the mounting substrate (LED substrate) on which the semiconductor light emitting element is mounted has a two-series arrangement configuration, but one or three or more series arrangement configurations or a parallel configuration may be used.

A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a circuit diagram of the lighting device 200. The ballast 35 is disposed in the lighting fixture 150 so as not to be visible from the outside. Reference numeral 36 denotes an AC power source.
The straight tube type LED lamp 100 includes a frequency discriminating circuit 37, an LED current detecting circuit 38, a memory device 39 as a storage means, an impedance control unit 40, a switching circuit 41, and a control means for controlling them. And a microcomputer 42 are provided.

The frequency discriminating circuit 37 circulates in the market at a frequency (50/60 ± 1 Hz) when the method of the ballast 35 is a glow starter type or a rapid start type even if variations including the accuracy of the power supply frequency are taken into consideration. Since the frequency (20 to 100 kHz) in the inverter type can be clearly discriminated, it can be used as a calibration reset means according to the discrimination result.
As a circuit configuration of the frequency discriminating circuit 37, a predetermined cut-off frequency is set, and a High Pass Filter configuration or a Low Pass Filter configuration is set, and an output thereof is input to the microcomputer 42.
In response to the input, the microcomputer 42 outputs an output that can select a control mode for passing the switching circuit 41 or not. Further, the microcomputer 42 leaves the frequency discrimination result as a log in the memory device 39 or a memory device inside the microcomputer 42.

In the LED current detection circuit 38, an impedance element (for example, a resistor) is provided in a line flowing through the LED element 12, and the voltage across the impedance element generated by the flowing current is used. There are other methods using a current sensor, a Hall element, etc., but the former method is preferable in view of cost.
The voltage generated by the flowing current is input to the AD converter terminal of the microcomputer 42 and converted, and the value is left as a log in the memory device 39 or the memory device inside the microcomputer 42.

  The memory device 39 is a device that records the result of the frequency discrimination circuit 37 and the converted value of the LED current as a log. As the memory device, a nonvolatile memory (Flash ROM) inside the microcomputer 42 can be used, and an EEPROM around the microcomputer 42 can also be used. The microcomputer 42 extracts log records from the memory device at the time of analysis.

  The impedance control unit 40 performs a switching operation according to the output signal of the microcomputer 42 and diverts the current flowing through the LED element 12. By this operation, the impedance can be controlled when viewed from the ballast 35.

  If the external input current to the straight tube LED lamp 100 is not a high frequency as a result of the determination by the frequency determination circuit 37, the microcomputer 42 controls the LED element 12 to perform a switching operation at a high frequency through the switching circuit 41. Ensure that a constant current flows. As the switching circuit 41, for example, a step-down chopper is used.

A reset pattern for automatically redoing calibration when the user installs the LED lamp in another location will be described.
[Reset pattern 1]
Before the LED lamp is installed at another location, the current value detected by the LED current detection circuit 38 is stored in the memory device 39 or a memory device inside the microcomputer 42.
If the current value detected by the LED current detection circuit 38 after installation of the LED lamp at another location has changed (increased), for example, by 20% or more from the stored current value, that is, if a predetermined condition is met, the micro The computer 42 resets the stored calibration value, and again executes calibration for searching for the optimum impedance point in the ballast.
This reset operation is performed when the ballast is changed from an electronic ballast to an electronic ballast.

[Reset pattern 2]
The result (high frequency = electronic ballast, low frequency = AC & magnetic ballast) detected by the frequency discriminating circuit 37 before installing the LED lamp in another place is the memory device 39 or the memory device inside the microcomputer 42. Remember it.
If the result detected by the frequency discriminating circuit 37 after installing the LED lamp in a different place is different from the stored frequency result, that is, if the ballast is different, the microcomputer 42 determines that the predetermined condition is satisfied, The stored calibration value is reset, and calibration for searching for the optimum impedance point with the ballast is performed again.
This reset operation is performed when the ballast is changed from an electronic ballast to an AC input & magnetic ballast.

[Reset pattern 3]
The reset pattern is a reset application method inside the LED lamp, but a reset can also be applied from the outside (second embodiment).
For example, as shown in FIG. 2, when the wall switch is turned on and off continuously or continuously by the user a predetermined number of times (for example, 5 times), the microcomputer 42 determines that the predetermined condition is satisfied, The stored calibration value is reset, and calibration for searching for the optimum impedance point with the ballast is performed again.

  In each said embodiment, although the user demonstrated the example which installs an LED lamp in another place, it can implement similarly in the transfer etc. to a different lighting fixture in the same place. This is because the type of ballast may be different for each lighting fixture even in the same place.

The other structure of the straight tube | pipe type LED lamp 100 is demonstrated.
As described above, the power supply substrate 7 is installed inside the flat portion 32 of the housing 2.
If there is no electronic component on the surface opposite to the mounting surface of the electronic component 9 of the power supply board 7 and an insulating material such as paint is applied to the flat portion 32 to ensure electrical insulation, the two are brought into direct contact with each other. Can be made.
A recess 30 that can accommodate the power supply substrate 7 is formed inside the housing 2.

The power supply board 7 converts the current sent from the commercial power supply from alternating current to direct current, supplies the current to the LED boards 11a and 11b via the lead wires 13a and 13b, and lights the LEDs 12a and 12b.
As shown in FIG. 9, the power supply substrate 7 is inserted by inserting the clamp 15 so that the hole 24 provided in the end portion thereof matches the hole 25 provided in the flat portion 32 of the housing 2 (see FIG. 10). , Fixed to the housing 2.
The clamp 15 is a locking means for fixing one end of the power supply substrate 7 in the longitudinal direction to the housing 2.
Thereby, the position shift of the power supply board 7 in the longitudinal direction can be regulated.
The other end of the power supply substrate 7 is held by the lead wires 13a and 13b as described above.

The hole 25 provided in the housing 2 is selected outside the LED substrate 11b and closer to the base 1b (see FIG. 4).
That is, the clamp 15 is set on the side of the power supply substrate 7 close to the base 1b and is set on the outer side of the LED substrate 11b.
Thus, by arranging the clamp 15 on the outside of the LED substrate 11, the luminous flux of the LED is not lost and shaded.
In FIG. 7 and the like, the clamp 15 shows a protruding shape for easy understanding.
In practice, as shown in FIG. 10, when the clamp 15 is inserted and pushed in from the outside of the flat portion 32, the elastically deformable portion 15 a spreads outward when it passes through the hole 24 of the power supply substrate 7.
Thereby, the power supply board 7 is fixed to the housing 2 by a one-touch operation.

  Since the heat dissipation effect is improved by making the outer periphery of the housing 2 uneven, and the power supply substrate 7 is installed in close contact with the flat portion 32 of the housing 2 and the adhesion is enhanced by the clamp 15. Heat from 7 can be efficiently released to the housing.

As shown in FIG. 8, the direction perpendicular to the power supply substrate 7 can be regulated by making the length under the clamp neck h <b> 1 and (the casing flat portion thickness + the power supply substrate thickness) h <b> 2 substantially the same. .
That is, the movement of the power supply substrate 7 in the thickness direction orthogonal to the longitudinal direction of the casing can be restricted.

The concave portion 30 includes a flat portion 32 and two ribs 31 a and 31 b as protrusions rising from the flat portion 32 in the thickness direction of the power supply substrate 7.
If the length L (see FIG. 5) of the ribs 31a and 31b is the same as the length of the housing 2, for example, extrusion processing is possible.
That is, it can be integrally molded simultaneously with the molding of the housing 2, and a reduction in manufacturing cost can be maintained.
Since the ribs 31a and 31b are formed in the flat portion 32, the space between the protrusions is formed on a flat surface.

As shown in FIG. 8, when the width of the power supply substrate 7 is D1, and the interval between the ribs 31a and 31b is D2, the relationship of D2> D1 is established.
That is, the width is set such that the power supply substrate 7 can be smoothly inserted into the recess 30.
The rib height H <b> 1 is set to a height substantially equal to the component mounting surface of the power supply substrate 7.
By doing so, even if the power supply substrate 7 tries to move in the left-right direction in the figure, it cannot get over the ribs 31a and 31b.

Therefore, the power supply substrate 7 is prevented from being displaced in the width direction (left-right direction) orthogonal to the longitudinal direction of the housing by the ribs 31a and 31b.
Thereby, disconnection of the lead wire (unintentional unlighting of the LED lamp) due to repeated displacement of the power supply substrate 7 in the width direction due to vibration during distribution or vibration due to an earthquake or the like can be suppressed.

Even when the power supply board 7 is slid and set in the housing 2, the ribs 31a and 31b can be used as guides, so that the positioning is easy and it can be inserted smoothly.
Since the casing 2 is formed into a cylindrical shape having the same cross-sectional shape by extrusion molding or pultrusion molding, the direction in which the power supply substrate 7 is inserted into the casing 2 may be from any end.
The height (H1) of the ribs 31a and 31b is set to a minimum height that can prevent the positional deviation of the power supply substrate 7 in the width direction. This is not a big increase.
That is, the mass of the housing increases, the housing is easily warped, and there is no fear of dropping due to vibration such as an earthquake.
On the contrary, since the rigidity in the longitudinal direction of the housing is improved by the reinforcing effect by the ribs, a secondary effect that it is difficult to bend can be obtained.

  As described above, by providing the ribs 31a and 31b by extrusion molding or the like, the movement of the power supply substrate 7 in the left-right direction is almost restricted.

When a necessary breakdown voltage against the leakage voltage cannot be secured between the housing 2 and the power supply substrate 7, a thin plate-like insulating member 41 capable of securing a breakdown voltage is provided between the two as shown in FIG.
The inner dimension of the insulating member 41 is set equal to or slightly larger than the substrate width E1 of the power supply substrate 7.
The outer dimension width E2 of the insulating member 41 is set to be larger than the rib interval E3 and can be inserted into the smooth.

The rib height H2 is also set larger than (insulating member thickness + power supply board thickness), but the power supply board 7 does not get over the ribs 31a and 31b even if it is lower than the insulating member height K1.
In the case of fixing with the clamp 15, the insulating member 41 can be fixed by inserting a hole in the insulating member 41 so as to be sandwiched between the housing 2 and the power supply substrate 7, and inserting the clamp 15 into the hole.
A hole (not shown) of the insulating member 41 is provided at a position where the power supply substrate 7 does not protrude from the insulating member 41 with the clamp 15 inserted.
A screw may be used instead of the clamp 15.
Even when the insulating member 41 is inserted, the movement of the power supply substrate 7 in the thickness direction is restricted by setting (case flat portion thickness + insulation member thickness + power supply substrate thickness) h3≈clamp neck length h1. can do.

  In the present embodiment, since the current flowing through the power supply substrate 7 does not flow through the housing 2 due to the presence of the insulating member 41, there is no risk of injury such as electric shock or fire.

  In each of the above-described embodiments, the straight tube LED lamp 100 is configured to be mounted on the lighting fixture 150 capable of lighting a fluorescent lamp, but may be configured to be mounted on a lighting fixture dedicated to LEDs.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to such specific embodiments, and unless specifically limited by the above description, the present invention described in the claims is not limited. Various modifications and changes are possible within the scope of the gist.
The effects described in the embodiments of the present invention are merely examples of the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

DESCRIPTION OF SYMBOLS 1a, 1b Base 12 LED element 39 Memory apparatus as a memory | storage means 42 Microcomputer as a control means 100 Straight tube | pipe type LED lamp as an LED lamp 150 Lighting fixture 200 Lighting apparatus

Special table 2013-527482 gazette

Claims (5)

The lamp body,
LED elements arranged inside the lamp body;
Control means for performing calibration to find the impedance point of the ballast provided in the luminaire;
Storage means for storing a result of calibration executed when the lamp body is electrically connected to the ballast;
With
The control unit is an LED lamp that resets the result of calibration and executes calibration again when a predetermined condition is met. The LED lamp according to claim 1, wherein
The LED lamp, wherein the predetermined condition is a change in current flowing in the LED element. The LED lamp according to claim 1, wherein
The LED lamp, wherein the predetermined condition is a change in frequency output from the ballast. The LED lamp according to claim 1, wherein
The predetermined condition is that the wall switch for lighting the LED lamp is continuously turned on and off a predetermined number of times.   The illuminating device provided with the LED lamp as described in any one of Claims 1-4, and the lighting fixture which mounts the said LED lamp.

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