JP2014192003A - Straight tube type lamp and illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straight tube type lamp and an illumination device capable of controlling a light emitting element of a plurality of systems with fewer power feeding terminals.SOLUTION: A straight tube type lamp 13 comprises: a straight tube type cover 20 having a translucent property at least at one part; a pair of bases 22 fitted at one end and the other end of the cover 20; a pair of terminals 32 provided at the base 22 fitted at one end of the cover 20; a light emitting unit 21 arranged in the cover 20 and having a first light emitting element 27a and a second light emitting element 27b which is lighting-controlled by lighting power of a system different from the first light emitting element 27a; and a control unit 23 including a switching unit 23c configured in such a manner that it can supply lighting power of different systems to the first light emitting element 27a and the second light emitting element 27b respectively, and a signal processing unit 23b for receiving a control signal superimposed on the power supplied from the pair of terminals, and controlling the switching unit 23c on the basis of the received control signal.

Description

  Embodiments described herein relate generally to a straight tube lamp using a light emitting element and a lighting device using the straight tube lamp.

2. Description of the Related Art Conventionally, there is a straight tube lamp that conforms to the Japan Light Bulb Industry Association standard JEL801 “Straight tube LED system with L-shaped base”. In this straight tube lamp, a light emitting unit having a plurality of light emitting elements is accommodated in a straight tube cover, and a base is attached to each end of the cover. A pair of L-shaped lamp pins connected to the light emitting unit protrude from the cap at one end. Then, by supplying DC power to the light emitting unit through the pair of lamp pins, the plurality of light emitting elements generate light, and the light is transmitted through the cover and emitted to the illumination space.
When a plurality of LEDs are arranged and controlled in a straight tube lamp, for example, when switching a plurality of light colors, at least three terminals are required for power supply.

JP 2012-84323 A JP 2011-44317 A

In a conventional straight tube lamp, when a plurality of light emitting elements are controlled by a power feeding terminal, three or more terminals are required.
The problem to be solved by the present invention is to provide a straight tube lamp and an illuminating device capable of controlling a plurality of light emitting elements with a small number of power feeding terminals.

  The straight tube lamp of the embodiment includes a straight tube cover having translucency at least in part, a pair of caps attached to one end and the other end of the cover, and the cap attached to one end of the cover A light emitting unit including a pair of terminals provided in the cover and a second light emitting element disposed in the cover and controlled to be turned on by a lighting power of a system different from the first light emitting element and the first light emitting element; A switching unit configured to be able to supply lighting power of different systems to the first light emitting element and the second light emitting element, and a control signal superimposed on the power supplied from the pair of terminals, and receiving And a signal processing unit that controls the switching unit based on the control signal.

  According to the present invention, it can be expected that a plurality of light emitting elements are controlled with a small number of power supply terminals.

It is a front view which shows the internal structure of the straight tube | pipe type lamp which shows 1st Embodiment. It is a perspective view of a straight tube | pipe type lamp same as the above. It is a circuit diagram explaining control of a straight tube | pipe type lamp same as the above. It is a block diagram which shows the control part of a straight tube | pipe type lamp same as the above. It is a perspective view of the illuminating device using a straight tube | pipe type lamp same as the above. The light output of the light of the 1st color temperature and the light of the 2nd color temperature at the time of changing the dimming ratio of the 1st light emitting element and the 2nd light emitting element, making the light beam of a straight tube | pipe lamp same as the above. It is a graph which shows the relationship. The light output of the light of the first color temperature, the light of the second color temperature, and the combined light when the dimming ratio between the first light emitting element and the second light emitting element of the straight tube lamp is changed. It is a graph which shows the relationship with an optical output. It is a flowchart figure which shows the process of the control part of a straight tube | pipe type lamp same as the above. It is a circuit diagram of the light emission unit which shows 2nd Embodiment.

  Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 8.

  In FIG. 5, the illuminating device 11 is, for example, an embedded lighting fixture for two lamps. The illuminating device 11 includes a longitudinal fixture body 12, a straight tube lamp 13 disposed in the fixture body, and a socket that is disposed opposite to both ends of the fixture body 12 and to which both ends of the straight tube lamp 13 are attached. The first socket 14a and the second socket 14b, and a control device 15 for supplying desired power and control signals to the straight tube lamp 13 are provided.

Next, as shown in FIGS. 1 and 2, the straight tube lamp 13 includes a straight tube-shaped cylindrical cover 20, a light emitting unit 21 housed in the cover 20, and one end and the other end of the cover 20. Are provided with a first base 22a and a second base 22b as a pair of bases.
The cover 20 has translucency at least in the light irradiation direction, and has light diffusibility so that the color mixture of a plurality of light colors is good.

  The light emitting unit 21 has a long substrate 25 along the longitudinal direction of the cover 20, and a first light emitting circuit 26 a to which lighting power of different systems is supplied onto a mounting surface which is one main surface of the substrate 25. And a second light emitting circuit 26b.

  The first light emitting circuit 26a includes a plurality of first light emitting elements 27a that emit light of a first color temperature mounted on the mounting surface of the substrate 25 at a predetermined interval along the longitudinal direction of the substrate 25. And a first wiring portion 28a formed on the mounting surface of the substrate 25 and connecting the plurality of first light emitting elements 27a in series.

The second light emitting circuit 26b emits light having a second color temperature different from the first color temperature mounted on the mounting surface of the substrate 25 at a predetermined interval along the longitudinal direction of the substrate 25. A plurality of second light emitting elements 27b and a second wiring portion 28b formed on the mounting surface of the substrate 25 and connecting the plurality of second light emitting elements 27b in series are provided. For example, the second color temperature is higher than the first color temperature or lower than the first color temperature. That is, the plurality of first light emitting elements 27a and the plurality of second light emitting elements 27b are configured to emit different light colors as a whole, for example, configured to emit light having different color temperatures. Has been.
The first wiring portion 28a and the second wiring portion 28b are connected to the control unit 23 by a third wiring portion 28c that is a common wiring on the low voltage side.

  The light emitting elements 27a and 27b include, for example, LED elements and EL elements. In the case of an LED element, for example, a surface mount type SMD (Surface Mount Device) package is used. In the present embodiment, the first light emitting elements 27a and the second light emitting elements 27b are alternately arranged in a line in the center area in the short direction of the substrate 25 along the longitudinal direction of the substrate 25, A first wiring portion 28a is disposed on one side of the substrate 25 in the short direction, and a second wiring portion 28b is disposed on the other side. In addition, a third wiring portion 28c is disposed on the other side of the substrate 25 in the short direction than the second wiring portion 28b.

  Further, a pair of lamp pins 32 as a pair of terminals protrude from the end face of the base 22a, and one lamp pin 35 protrudes from the end face of the base 22b. The pair of lamp pins 32 is formed of a flat metal plate having a square cross section, and protrudes along the longitudinal direction of the straight tube lamp 13, and the leg 33 from the tip of the leg 33 to the other leg 33. Are bent into an L shape having a bent portion 34 projecting outwardly so as to be separated from each other.

  The straight tube lamp 13 has a pair of lamp pins 32 projecting from the base 22a in parallel, and the surface parallel to the direction in which the pair of lamp pins 32 are arranged in parallel with the substrate 25 of the light emitting unit 21. Is provided.

The sockets 14a and 14b are configured so that the caps 22a and 22b of the straight tube lamp 13 are mounted and mechanically held, and the socket 14a and the cap 22a are electrically connected.
Next, as shown in FIG. 3, the control device 15 for the straight tube lamp 13 includes a signal modulation unit 40 and an output circuit 41.

  The signal modulation unit 40 superimposes a control signal on the input AC power supply E and outputs control power from the output circuit 41. Here, the control power is a signal in which a control signal is superimposed on an AC voltage, but may be a DC voltage as long as a control signal is superimposed on the power for lighting.

When receiving a control instruction from the luminaire control unit 50 disposed outside or inside the luminaire, the signal modulation unit 40 superimposes a control signal on the AC power source based on the control instruction and outputs the control signal from the output circuit 41. Note that the output circuit 41 may be configured to output a DC voltage on which a control signal is superimposed.
The output circuit 41 is electrically connected to the pair of lamp pins 32 of the first base 22a through the first socket 14a.

As shown in FIG. 4, the control unit 23 includes a power supply unit 23a, a signal processing unit 23b, and a switching unit 23c, and also includes a pair of input terminals 24a and a switching unit 23c to which control power from a pair of lamp pins 32 is input. A first output terminal 24b for outputting two types of output power and a second output terminal 24c connected to the signal processing unit 23b are provided. The power supply unit 23a supplies power to the signal processing unit 23b and the switching unit 23c. The signal processing unit 23b is connected in parallel to the control power input from the pair of input terminals 24a, reads the control signal superimposed on the control power, supplies lighting power to the switching unit 23c, The switching unit 23c is controlled according to the contents. Specifically, the signal processing unit 23b switches which of the two outputs of the switching unit 23c outputs the lighting power by controlling the switching unit 23c. Note that the switching unit 23c may include three or more output terminals.
Next, the operation of the control unit 23 will be described.

  First, control instructions from the commercial power source E and the lighting fixture control unit 50 are input to the control device 15. The control instruction from the luminaire control unit 50 is, for example, an instruction for switching the color temperature, an output change, or an instruction for a light color such as a color temperature.

  The control device 15 outputs control power from the output circuit 41 based on the control instruction. Control power supplied from the output circuit 41 of the control device 15 to the straight tube lamp 13 through the first socket 14a and the first base 22a is input to the pair of input sections 24a. The signal processing unit 23b supplies lighting power to the switching unit 23c, and controls the switching unit 23c according to the content of the control signal when a control signal is superimposed on the control power. For example, if the control instruction simply switches the output system of the switching unit 23c, the current setting may be changed for the switching unit 23c to output the lighting power from a different output system. If the control instruction is to increase or decrease the color temperature, the switching unit 23c is controlled accordingly. Furthermore, when controlling to a desired color temperature, the light of the first color temperature generated by the first light emitting element 27a and the second light emitting element 27b are switched by switching the output system at the switching unit 23c at a predetermined frequency. You may make it color-mix control with the light of the 2nd color temperature to generate | occur | produce.

  On the other hand, when the control signal is not superimposed on the control power, for example, the lighting power is supplied to the first light emitting circuit 26a so that the lighting power is output from one of the switching units 23c as an initial setting. Thus, the switching unit 23c is controlled. If there is no instruction from the signal processing unit 23b, the switching unit 23c may output the lighting power to one of the systems as an initial setting, for example, to the first light emitting circuit 26a, or change the previous control state. You may make it maintain. In this way, by supplying lighting power to the first light emitting circuit 26a or the second light emitting circuit 26b, a plurality of first light emitting elements 27a connected in series to the first light emitting circuit 26a, or The plurality of second light emitting elements 27b connected in series to the two light emitting circuits 26b are turned on. The light of the color temperature generated by the first or second light emitting element 27a, 27b is transmitted through the cover 20 and emitted to the illumination space.

  Furthermore, the signal processing unit 23b can perform variable color control by switching the switching unit 23c at a predetermined frequency, but the lighting power may be output simultaneously from the pair of first output units. As described above, in a state where both the first light emitting element 27a and the second light emitting element 27b are turned on or when switching control is performed at a predetermined frequency, the light of the first color temperature generated by the first light emitting element 27a. And the light of the second color temperature generated by the second light emitting element 27b are transmitted through the cover 20 and emitted to the illumination space. At this time, the first light-emitting elements 27a and the second light-emitting elements 27b are alternately arranged in a line in the center area in the short direction of the substrate 25 along the longitudinal direction of the substrate 25. The light of the first color temperature and the light of the second color temperature are mixed well. Furthermore, the cover 20 may be provided with sufficient light diffusibility so that color mixing is performed well.

  In addition, the lighting fixture controller 50 changes the power supplied to the first light emitting circuit 26a and the power supplied to the second light emitting circuit 26b to change the light of the first light emitting element 27a and the second light emitting element 27b. The output may be changed.

  In FIG. 6, the light A and the second color light having the first color temperature when the light control ratio of the first light emitting element 27a and the second light emitting element 27b is changed while the luminous flux of the straight tube lamp 13 is constant. It is a graph which shows the relationship with the light output of the light B of the color temperature of. By increasing the light output from the first light emitting element 27a and lowering the light output from the second light emitting element 27b, the color temperature of the straight tube lamp 13 includes a large amount of light A having the first color temperature. Can be changed to temperature. On the other hand, by reducing the light output from the first light emitting element 27a and increasing the light output from the second light emitting element 27b, the color temperature of the straight tube lamp 13 is increased with the light B having the second color temperature. The color temperature can be changed.

  Further, as shown in FIG. 7, when the dimming ratio between the first light emitting element 27a and the second light emitting element 27b of the straight tube lamp 13 is changed, the light A and the second light having the first color temperature are changed. 6 is a graph showing the relationship between the light output of light B and the light output of combined light C having a color temperature of 2. For example, the light output from the second light emitting element 27b is changed while the light output from the first light emitting element 27a remains constant, or the light output from the second light emitting element 27b remains constant. By changing the light output from one light emitting element 27a, the color temperature of the straight tube lamp 13 can be changed so as to include a large amount of light A having the first color temperature or light B having the second color temperature. In addition, the light output of the combined light C can be changed.

In this way, the straight tube lamp 13 can control the light emitting circuits of a plurality of systems by using the two lamp pins 32, and the color temperature of light emitted from the single straight tube lamp 13 can be easily achieved. You can switch to
Further, the color temperature of the light emitted from the straight tube lamp 13 can be arbitrarily changed.
Next, the operation of the control unit 23 will be described using the flowchart of FIG.

  First, when power is supplied, the power supply unit 23a activates the signal processing unit 23b, and the processing starts. In step 1, it is determined whether or not a control signal is included in the control power. When the control signal is not included, the process proceeds to step S2, the switching unit 23c is controlled in the initial setting state or the previous control state, and the process is terminated.

  On the other hand, when the control signal is included in the control power in the process of step S1, the process proceeds to step S3. In step S3, the control signal is read from the control power, the switching unit 23c is controlled in accordance with the control signal, and the process ends.

  Next, a second embodiment will be described with reference to FIG. Since the other configuration is the same as that of the first embodiment, each component will be described using the same reference numerals, and detailed description thereof will be omitted.

  In the second embodiment, the first light-emitting element 27a and the second light-emitting element 27b are configured as sensors that can detect the light output of the other light-emitting element that is turned on when one is turned off.

  As shown in FIG. 9, the first light emitting element 27a and the second light emitting element 27b are mounted adjacent to each other so as to alternate in the longitudinal direction. Further, the first light emitting circuit 26a and the second light emitting circuit 26b are respectively provided with detection units 28d and 28d configured to be able to detect currents flowing through the plurality of light emitting elements. The detection unit 28d provided in the first light emitting circuit 26a and the detection unit 28d provided in the second light emitting circuit 26b are configured so that no current flows between them, and are connected to the signal processing unit 23b.

  The signal processing unit 23b can switch the output unit of the switching unit 23c and can detect the light output of the light emitting element that is turned on by the detection unit 28d provided on the light emitting circuit side that is turned off. As a result, a feedback loop is formed by the detection unit 28d and the signal processing unit 23b, and the light-emitting element that is lit can be feedback-controlled. Further, by alternately switching the first light emitting circuit 26a and the second light emitting circuit 26b and performing feedback control, it is possible to perform feedback control on the mixed color light. For example, the switching unit 23c may be switched so as to change the lighting time of each system so as to achieve a desired color temperature, the output of each lighting power may be controlled, or a combination of these Also good.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Lighting equipment
13 Straight tube lamp
14a, 14b socket
15 Control unit
20 Cover
21 Light emitting unit
22a First cap as a cap
22b Second base as a base
23 Control unit
23b Signal processor
23c switching part
26a First light emitting circuit
26b Second light emitting circuit
27a First light emitting device
27b Second light emitting device
32 Lamp pin as terminal
28d detector

Claims (5)

A straight tube-shaped cover having translucency at least partially;
A pair of caps attached to one end and the other end of the cover;
A pair of terminals provided on the base attached to one end of the cover;
A light emitting unit having a second light emitting element disposed in the cover and controlled to be turned on by a different power of the first light emitting element and the first light emitting element;
While receiving the control signal superimposed on the electric power supplied from the pair of terminals, the switching unit configured to be able to supply lighting power of different systems to the first light emitting element and the second light emitting element, A control unit comprising: a signal processing unit that controls the switching unit based on a received control signal;
A straight tube lamp characterized by comprising:   The first light emitting element and the second light emitting element emit different light colors, and the control unit controls the switching unit to variably control the light emission color. The straight tube lamp according to claim 1 or 2.   2. The straight tube lamp according to claim 1, wherein the control unit controls the switching unit in an initial state or a previous control state when a control signal is not superimposed on the supplied power.   The light-emitting unit includes a first light-emitting circuit including a first light-emitting element, a second light-emitting circuit including a second light-emitting element, and the first light-emitting element or the second light-emitting element being turned off. A detection unit that detects current generated in the first light-emitting circuit or the second light-emitting circuit by the received light, and the control unit performs the first light emission based on the current detected by the detection unit The straight tube lamp according to any one of claims 1 to 3, wherein the element or the second light emitting element is controlled. A straight tube lamp according to any one of claims 1 to 4;
A pair of sockets for mounting the caps at both ends of the straight tube lamp;
A control device that superimposes a control signal on a commercial power source and supplies power from the socket to the control unit of the straight tube lamp;
An illumination device comprising:

Images