JP2012014897A - Led illumination device with emergency light function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED illumination device with an emergency light function that is easily made compact.SOLUTION: A common illumination plane 14 for both normal use and emergency use is constituted by mixedly arranging a plurality of LEDs 11 for normal use which are driven by a normal power source, and a plurality of LEDs 13 for emergency use which are driven by an emergency power source operating when the power supply from the normal power source is ceased, and less than the LEDs 11 for normal use. The LEDs 13 for emergency use can serve as LEDs 11 for normal use. The plurality of LEDs 13 for emergency use may display symbols and/or characters on the illumination plane 14 in an emergency.

Description

  The present invention relates to an LED lighting device with an emergency light function. That is, the present invention relates to an LED lighting device having a function as an emergency light (preliminary light) using an LED (Light Emitting Diode).

As a conventional lighting device with an emergency light function, an “elevator emergency light device” as disclosed in Patent Document 1, for example, is known.
Explained with reference to the reference, this device is an emergency lamp that operates when the power supply from the normal power source (5) and the illumination lamp (4) driven by the normal power source (5) are stopped. An emergency light (reference numeral 6 in FIG. 1 and reference numeral 11 in FIG. 2 and the like) composed of a plurality of emergency LEDs (13) driven by a power supply (auxiliary power supply (8)) is provided.

In this apparatus, the illumination lamp (4) is turned on during normal times, and the emergency lights (6, 11) made up of a plurality of emergency LEDs (13) are turned on during a power failure (emergency).
According to this apparatus, since the emergency lights (6, 11) are constituted by the LEDs (13), power consumption in an emergency can be reduced.

  However, this conventional apparatus has a drawback that the apparatus tends to be large because the illumination lamps (4) that are normally lit and the emergency lights (6, 11) that are lit in an emergency are separately configured. .

JP 2003-334881 A

  The problem to be solved by the present invention is to provide an LED lighting device with an emergency light function that is easy to miniaturize.

  In order to solve the above-described problems, an LED lighting device with an emergency light function according to the present invention includes a plurality of normal LEDs driven by a normal power supply and an emergency operation that operates when power supply from the normal power supply is stopped. A common illumination surface is formed by mixing a plurality of emergency LEDs, which are driven by a power source, and a smaller number of emergency LEDs than the number of normal LEDs.

According to this LED lighting device with an emergency light function, a plurality of normal LEDs are lit by a normal power source in a normal time, and an emergency power source has a number of emergency LEDs that are smaller than the number of emergency LEDs. LED lights up. In both normal and emergency cases, the illumination is obtained by a plurality of LEDs. Therefore, the desired illuminance can be easily obtained by adjusting the number of LEDs, and the power consumption is lower than incandescent and fluorescent lamps. The desired illuminance can be obtained.
In addition, since the number of emergency LEDs is smaller than the number of normal LEDs, power saving can be achieved in an emergency.

According to the device of the present invention, since a plurality of normal LEDs and a plurality of emergency LEDs are mixed to form a normal and emergency illumination surface, a plurality of normal LEDs and a plurality of emergency LEDs are formed. It is no longer independent from the emergency LED. Therefore, it is easy to reduce the size of the device as compared with the conventional device.
In addition, the normal illumination means (plural LEDs) and the emergency illumination means (plurality of LEDs) are configured by mixing a plurality of normal LEDs and a plurality of emergency LEDs to form a common illumination surface in normal and emergency situations. LED), it is possible to reduce unevenness in illumination and improve the degree of freedom in design.

Preferably, the emergency LED also serves as the normal LED.
In this way, the device can be further miniaturized.

Preferably, the plurality of emergency LEDs display symbols and / or characters on the illumination surface in an emergency.
In this way, a message can be transmitted to the person who sees the illumination surface in an emergency.

It is a figure which shows one Embodiment of the LED lighting apparatus with an emergency light function which concerns on this invention, (a) is a front view, (b) is a bottom view. The circuit diagram which shows an example of the drive circuit of the illumination device. (A)-(f) is explanatory drawing of an illumination surface. (A) is a bottom view of a comparative example, (b) is an explanatory view of the illumination surface. The circuit diagram which shows the modification of the drive circuit 30. FIG. The circuit diagram which shows the further modification of the drive circuit 30. FIG. The circuit diagram which shows the example of the drive circuit 30 in the case of connecting and driving the LED lighting apparatus 10 with an emergency light function. The circuit diagram which shows the further modification of the drive circuit 30. FIG. It is a figure which shows other embodiment of the LED lighting apparatus with an emergency light function which concerns on this invention, (a) Bottom view, (b) is explanatory drawing of the illumination surface. It is a figure which shows other embodiment of the LED lighting apparatus with an emergency light function which concerns on this invention, (a) Bottom view, (b) is explanatory drawing of the illumination surface. It is a figure which shows other embodiment of the LED lighting apparatus with an emergency light function which concerns on this invention, (a) Bottom view, (b) is explanatory drawing of the illumination surface. The schematic sectional drawing which shows the example of mounting of normal LED11 and emergency LED13.

Hereinafter, embodiments of an LED lighting device with an emergency light function according to the present invention will be described with reference to the drawings.
1A and 1B show an embodiment of an LED lighting device with an emergency light function according to the present invention, in which FIG. 1A is a front view and FIG. 1B is a bottom view. FIG. 2 is a circuit diagram showing an example of a drive circuit of the illumination device.

As shown in these figures, the LED lighting device 10 with an emergency light function has a plurality of normal LEDs 11, 11,... Driven by the normal power supply 20 and power supply from the normal power supply 20 is stopped. A common and normal emergency illumination surface 14 is configured by mixing a plurality of emergency LEDs 13, 13,. It is.
Since the normal LED 11 and the emergency LED 13 can be configured by the same LED, it is difficult to distinguish between the normal LED 11 and the emergency LED 13 when they are drawn in the same shape in FIG. Therefore, for convenience of explanation, the emergency LED 13 is depicted as a double circle in FIG. The same applies to the other drawings.

  In this embodiment, as shown in FIG. 1B, a total of 48 normal LEDs 11 are arranged in two rings and five in the center, and an emergency LED 13 is an ordinary LED 11 arranged in a ring shape. A total of twelve concentric elements are arranged on the inner side. However, the number of normal LEDs 11 can be set as long as the number is three or more, and the number of emergency LEDs 13 is two or more and in a range smaller than the number of normal LEDs 11. It can be set appropriately. Moreover, the arrangement pattern of these LEDs 11 and 13 is also arbitrary. Other examples of the arrangement pattern will be described later, but are not limited to these patterns.

According to such an LED lighting device 10 with an emergency light function, a plurality of normal LEDs 11 are lit by a normal power source 20 in a normal time, and a plurality of normal LEDs are connected by an emergency power source 12 in an emergency. Fewer emergency LEDs 13 are lit than the number. In both normal and emergency cases, the illumination is obtained by a plurality of LEDs. Therefore, the desired illuminance can be easily obtained by adjusting the number of LEDs, and the power consumption is lower than incandescent and fluorescent lamps. The desired illuminance can be obtained.
In addition, since the number of emergency LEDs 13 is smaller than the number of normal LEDs 11, power saving can be achieved in an emergency.

And according to the LED lighting device 10 with the emergency light function of this embodiment, since the plurality of normal LEDs 11 and the plurality of emergency LEDs 13 are mixed to form the illumination surface 14 common to the normal time and the emergency time, The plurality of normal LEDs 11 and the plurality of emergency LEDs 13 are not independent and separate. Therefore, the device 10 can be easily downsized as compared with the conventional device.
In addition, the normal illumination means (plural LEDs 11) and the emergency illumination means (plurality of LEDs) are formed by mixing the plurality of normal LEDs 11 and the plurality of emergency LEDs 13 to form the common illumination surface 14 for normal and emergency situations. However, it is possible to make it difficult to produce uneven illuminance (illumination unevenness) and improve design freedom.

In order to explain this point in detail, the significance of “a plurality of normal LEDs and a plurality of emergency LEDs are mixed to form a common illumination surface in normal and emergency situations” will be described.
In the present application, an illumination surface composed of a plurality of LEDs refers to a surface surrounded by a contour line connecting the outermost sides of the plurality of LEDs (contour line as an outer shell line of the arrangement region of the plurality of LEDs). means.

  Taking the LED lighting device 10 with an emergency light function shown in FIG. 1 (b) as an example, an explanation will be given with reference to FIG. (B)) is a surface (shaded portion in FIG. 3B) surrounded by a contour line 11c (FIG. 3A) indicated by an alternate long and short dash line connecting the outermost sides of the LEDs 11.

  Similarly, an illuminating surface (emergency illuminating surface) 13s (FIG. 3 (d)) constituted by a plurality of emergency LEDs 13 is a contour line 13c (FIG. 3) indicated by a one-dot chain line connecting the outermost sides of the LEDs 13. It is a surface (shaded part in FIG. 3D) surrounded by (c)).

In the present application, the meaning that “a plurality of normal LEDs and a plurality of emergency LEDs are mixed to form a common illumination surface in normal and emergency situations” means normal illumination composed of a plurality of normal LEDs. This means that the surface (11s) and the emergency illumination surface (13s) composed of a plurality of emergency LEDs are at least partially overlapped.
In the example shown in FIGS. 1 and 3, as shown in FIGS. 3 (e) and 3 (f), an emergency lighting surface 11 s composed of a plurality of normal LEDs 11 and an emergency LED 13 composed of a plurality of emergency LEDs 13. The illuminating surface 13s overlaps the emergency illuminating surface 13s portion (cross hatch portion).

  Therefore, for example, like the LED lighting device 100 with an emergency light function shown as a comparative example in FIG. 4, an emergency illumination surface 11s composed of a plurality of normal LEDs 11 and an emergency light composed of a plurality of emergency LEDs 13 It cannot be said that the illumination surface 13 s does not overlap at all with “a plurality of normal LEDs and a plurality of emergency LEDs are mixed to form a common illumination surface in normal and emergency situations”.

  According to the LED lighting device 10 with an emergency light function of this embodiment, since a plurality of normal LEDs 11 and a plurality of emergency LEDs 13 are mixed to form a normal and emergency common illumination surface 14, For example, as is apparent from comparison with the above-described conventional example and the apparatus 100 of the comparative example shown in FIG. 4, the plurality of normal LEDs 11 and the plurality of emergency LEDs 13 are not independent and separate. Therefore, the device 10 can be easily downsized as compared to the conventional device and the device 100 of the comparative example.

  Further, in the conventional apparatus and the apparatus 100 of the comparative example, the normal illumination surface and the emergency illumination surface are independent and do not overlap with each other, so that uneven illuminance (illumination unevenness) is likely to occur between the normal time and the emergency time. Therefore, since it is necessary to make the normal illumination surface and the emergency illumination surface independent, the degree of freedom in design is also limited.

  On the other hand, according to the LED lighting device 10 with an emergency light function of this embodiment, a plurality of normal LEDs 11 and a plurality of emergency LEDs 13 are mixed to form a common illumination surface 14 for normal and emergency situations. Therefore, even though the normal illumination means (the plurality of LEDs 11) and the emergency illumination means (the plurality of LEDs 13) are provided, uneven illumination (uneven illumination) is hardly generated and the degree of freedom in design is reduced. Can be improved.

  In FIG. 1, reference numeral 15 denotes a case (support) of the LED lighting device 10 with an emergency light function, and the normal LED 11, the emergency LED 13, and the drive circuit 30 are mounted on the case 15. The LED lighting device with an emergency light function 10 can be attached to a ceiling or a wall of a building or a ship by fixing the case 15 with an appropriate means.

  The drive circuit 30 of the lighting device shown in FIG. 2 is connected to a normal power source 20 (for example, AC 100V), and is connected to the diode bridge 32 using an AC power source as a DC power source. ..Emergency LED drive circuit 31 for driving the emergency power supply 12 (for example, a battery) and an emergency power supply connected to the emergency power supply 12 via a switch 35 to drive the emergency LEDs 13. The switch 35 is connected to the LED drive circuit 33 and the diode bridge 32 to detect the power supply from the normal power source 20, that is, the power supply from the diode bridge 32. When the power supply is present, the switch 35 is turned off. And a power supply detection means 34 for turning on the switch 35 when there is no power supply.

  In FIG. 2, only four normal LEDs 11 are drawn and the others are omitted, but in actuality, the same number of LEDs 11 as shown in FIG. 1B are connected. In addition, although only two emergency LEDs 13 are drawn and the others are omitted, in practice, the same number of emergency LEDs 13 as those shown in FIG. 1B are connected.

According to this drive circuit 30, when power supply from the normal power supply 20 is obtained, the switch 35 is turned off by the operation of the power supply detection means 34, and only the normal LED 11 is driven by the normal LED drive circuit 31. , Illumination by the normal LED 11 is obtained.
On the other hand, when the power supply from the normal power supply 20 is stopped due to a power failure or the like, the illumination by the normal LED 11 cannot be obtained, but the switch 35 is turned on by the operation of the power supply detection means 34, and the emergency LED is powered by the power from the emergency power supply 12. The drive circuit 33 operates and illumination by the emergency LED 13 is obtained.

  The simplest configuration example of the LED drive circuit (31, 33) is a configuration in which a resistor is connected in series with the LED, but it can also be configured by a known constant current drive circuit that is integrated into an IC. The LED drive current can be determined by the current detection resistor.

FIG. 5 is a circuit diagram showing a modified example of the drive circuit 30. In the figure, the same parts as those of the drive circuit 30 shown in FIG.
The drive circuit 30 shown in FIG. 5 is configured so that the emergency LED 13 can be used as the normal LED 11 (the emergency LED 13 also serves as the normal LED 11). Emergency LEDs 13 (also serving as normal LEDs 11) are connected in series to the LEDs 11..., And an emergency power source 12, switch 35, The emergency LED drive circuit 33 is connected in parallel.

According to this drive circuit 30, when the power supply from the normal power supply 20 is obtained, the switch 35 is turned off by the operation of the power supply detection means 34, and the normal LED 11 and the emergency LED 13 are operated by the normal LED drive circuit 31. The (normal and normal LED 11) is driven, and the illumination by the normal LED 11 and the emergency LED 13 (alternative LED 11), that is, the illumination by all the LEDs is obtained.
On the other hand, when the power supply from the normal power supply 20 is stopped due to a power failure or the like, the operation of the normal LED drive circuit 31 is stopped, and therefore the illumination by the normal LED 11 cannot be obtained. The emergency LED drive circuit 33 is activated by the power from the emergency power supply 12, and illumination by the emergency LED 13 (also serving as the normal LED 11) is obtained.

  As described above, when the emergency LED 13 also serves as the normal LED 11, the device 10 can be further reduced in size.

FIG. 6 is a circuit diagram showing a further modification of the drive circuit 30. In the figure, the same parts as those of the drive circuit 30 shown in FIG.
The driving circuit 30 shown in FIG. 6 differs from the driving circuit 30 shown in FIG. 5 in that a switching circuit 36 using transistors Q1 and Q2 is configured in place of the power supply detecting means 34 and the switch 35 in FIG. The power supply 12 is floatingly charged. Further, a part (1 in the figure) 11 ′ of the normal LED 11 is connected in series to the emergency LED 13 through the collector of the transistor Q2.

  According to this drive circuit 30, when power is supplied from the normal power source 20, the transistor Q1 is on and the transistor Q2 is off. The normal LED drive circuit 31 causes the normal LEDs 11, 11 ′. Then, the emergency LED 13 (also serving as the normal LED 11) is driven, and illumination by the normal LEDs 11, 11 ′ and the emergency LED 13 (also serving as the normal LED 11) is obtained. That is, all the LEDs are turned on. Further, by configuring the emergency power supply 12 with a battery having a rating lower than the potential at the point E, the battery 12 is charged through the resistor 37.

On the other hand, when the power supply from the normal power supply 20 is stopped due to a power failure or the like, the operation of the normal LED drive circuit 31 is stopped and the output is lost, so that the illumination by the normal LED 11 cannot be obtained, but the transistor Q1 is turned off. The transistor Q2 is turned on by the potential from the emergency power supply 12. As a result, a part of the normal LED 11 (one shown in the figure) 11 'connected in series to the emergency LED 13 is short-circuited by the transistor Q2, and the potential at the point E becomes equal to the number of the emergency LEDs 13. The emergency LED 13 (also serving as the normal LED 11) is turned on by the power of the power source 12.
According to this circuit, no backflow prevention diode is required on the battery 12 side. Further, the voltage of the battery 12 can be selected more freely if the number of the normal LEDs 11 ′ that are short-circuited by the transistor Q2 is increased.
Note that a current limiting resistor can be inserted into the collector of the transistor Q2 to suppress an emergency current.

FIG. 7 is a circuit diagram showing an example of the drive circuit 30 when a plurality of LED lighting devices 10 with an emergency light function are connected and driven.
In the illustrated circuit, the power supply detection means 34 and the switch 35 are used, but instead of this, a switching circuit similar to the switching circuit 36 described above can be used. Moreover, although emergency LED13 of LED lighting apparatus 10 with an emergency light function showed the example of serial connection, it is good also as parallel. Moreover, although the thing of illustration has shown the case where the two LED lighting apparatuses 10 with an emergency light function are connected, the case where it is three or more can also be comprised similarly.

FIG. 8 is a circuit diagram showing a further modification of the drive circuit 30. In the figure, the same reference numerals are given to the same parts as those of the drive circuit described above.
The drive circuit 30 is characterized in that the DC / DC converter 38 connected to the diode bridge 32 constitutes the drive circuit for the normal LED 11 and the emergency LED 13, and the DC / DC converter 38 has a constant current having transistors Q 3 and Q 4. The emergency power source 12 made of a battery is charged through a charging circuit 39 and a backflow prevention diode 40 of the shape.

  According to this drive circuit 30, when power is supplied from the normal power supply 20, the transistor Q1 is ON and the transistor Q2 is OFF, and only the normal LED 11 is driven by the DC / DC converter 38. , Illumination by the normal LED 11 is obtained. The emergency power supply (battery) 12 is charged via the charging circuit 39 and the backflow prevention diode 40.

  On the other hand, if the power supply from the normal power supply 20 is stopped due to a power failure or the like, the operation of the DC / DC converter 38 is stopped and the output is lost, so that the illumination by the normal LED 11 cannot be obtained, but the transistor Q1 is turned OFF The transistor Q2 is turned on by the potential from the emergency power supply 12. As a result, the emergency LED 13 is turned on by the power of the emergency power supply 12. At this time, the voltage applied to the LED from the emergency power supply 12 is lower than normal, so the normal LED 11 is not lit. By using means such as connecting a control (switch) transistor to the row of normal LEDs 11, it is possible to prevent the normal LEDs 11 from being lit in an emergency. Further, in order to share some of the normal LEDs 11 for emergency use as in the circuit shown in FIG. 6, the collector of the transistor Q2 may be connected to an appropriate place of the normal LEDs 11 group via a resistor.

9A and 9B are diagrams showing another embodiment of the LED lighting device with an emergency light function according to the present invention, in which FIG. 9A is a bottom view, and FIG. 9B is an explanatory view of the illumination surface. In FIG. 9, the same reference numerals are given to the same or corresponding parts as those of the above-described embodiment.
A feature of this embodiment is that a plurality of emergency LEDs 13 are configured to display symbols on the illumination surface 14 in an emergency.

Although the illustrated symbol is an arrow, an arbitrary symbol can be configured by arranging a plurality of emergency LEDs 13 in a dot display manner.
Since the emergency LED 13 of this embodiment also serves as the normal LED 11, the drive circuit 30 shown in FIG. 5 or 6 is used.
According to this embodiment, in the event of an emergency, an emergency light function is obtained by the emergency LED 13 and only the symbol (in this case, an arrow) is displayed by the emergency LED 13, so that a message, for example, an emergency exit, is displayed to the person viewing the illumination surface. It is possible to transmit a message indicating that is in the direction of the arrow.

  In the case of this embodiment, the normal illumination surface 11s surrounded by the outline 11c indicated by the one-dot chain line connecting the outermost sides of the plurality of normal LEDs 11 and the one point connecting the outermost sides of the plurality of emergency LEDs 13 are connected. The emergency illumination surface 13s surrounded by the outline 13c indicated by the chain line overlaps with the emergency illumination surface 13s portion (cross hatch portion in FIG. 5B).

FIG. 10 is a view showing another embodiment of the LED lighting device with an emergency light function according to the present invention, in which (a) is a bottom view and (b) is an explanatory view of the illumination surface. In FIG. 10, the same reference numerals are given to the same or corresponding parts as those of the above-described embodiment.
A feature of this embodiment is that a plurality of emergency LEDs 13 are configured to display characters on the illumination surface 14 in an emergency.

The illustrated character is “EXIT”, but an arbitrary character can be formed by arranging a plurality of emergency LEDs 13 in a dot display manner.
Since the emergency LED 13 of this embodiment also serves as the normal LED 11, the drive circuit 30 shown in FIG. 5 or 6 is used.
According to this embodiment, the emergency LED 13 provides an emergency light function in the event of an emergency, and only the characters (in this case, “EXIT”) are displayed by the emergency LED 13, so that a message to the person viewing the illumination surface is displayed. For example, the position of the emergency exit can be transmitted.

In the case of this embodiment, the normal illumination surface 11s surrounded by the outline 11c indicated by the one-dot chain line connecting the outermost sides of the plurality of normal LEDs 11 and the one point connecting the outermost sides of the plurality of emergency LEDs 13 are connected. The emergency illumination surface 13s surrounded by the outline 13c indicated by the chain line overlaps with the emergency illumination surface 13s portion (cross hatch portion in FIG. 5B).
In the embodiment shown in FIG. 9 and FIG. 10, the case where the symbol and the character are displayed separately is exemplified, but the symbol and the character can be displayed in combination.

FIG. 12 is a schematic cross-sectional view showing a mounting example of the normal LED 11 and the emergency LED 13. In FIG. 12, the same reference numerals are given to the same or corresponding parts as those of the above-described embodiment.
In the figure, reference numeral 50 denotes a circuit board constituting the drive circuit 30. A plurality of normal LEDs 11, a plurality of emergency LEDs 13 and a plurality of emergency LEDs 13 are provided on one surface (the lower surface in the figure) of the circuit board 50. ICs 51 constituting the drive circuits 31 and 33 are mounted.
On the other surface of the circuit board 50 (the upper surface in the figure), a heat sink 52 shared by the normal LED 11 and the emergency LED 13 is joined. The heat dissipating plate 52 is for dissipating heat from the normal LED 11 and the emergency LED 13 that generate heat, and can be formed of a metal plate or the like that is in close contact with the circuit board 50.

By sharing the heat radiating plate for the normal LED 11 and the heat radiating plate for the emergency LED 13 by the single heat radiating plate 52, the LED lighting device 10 with the emergency light function can be further miniaturized.
Further, in an emergency, since a common heat sink 52 is provided for a smaller number of LEDs 13 than in a normal state, a better heat dissipation state can be obtained.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the gist of the present invention.
For example, as shown in FIG. 11, the illumination surface 14 can be configured by linearly arranging a plurality of normal LEDs 11 and emergency LEDs 13. In this case, the normal illumination surface 11s surrounded by the outline 11c indicated by the one-dot chain line connecting the outermost sides of the plurality of normal LEDs 11 and the outline 13c indicated by the one-dot chain line connecting the outermost sides of the plurality of emergency LEDs 13 The emergency illumination surface 13s surrounded by is overlapped in the emergency illumination surface 13s portion (cross-hatched portion in FIG. 5B).

  The illumination surface 14 can be configured by covering a plurality of LED groups with lenses (normal LED 11 and emergency LED 13) as they are with a protective cover, or by covering them with a color filter, a lens, a diffusion plate, or the like. You can also.

10 LED lighting device with emergency light function 11 LED for normal use
12 Emergency power supply 13 Emergency LED
14 Illuminated surface 20 Normal power supply

Claims (3)

  A plurality of normal LEDs driven by a normal power supply and an emergency power supply that is driven by an emergency power supply that operates when power supply from the normal power supply is stopped and is smaller than the number of the normal LEDs An LED lighting device with an emergency light function, wherein a common illumination surface and an emergency surface are configured by mixing LEDs.   2. The LED lighting device with an emergency light function according to claim 1, wherein the emergency LED also serves as the normal LED.   3. The LED lighting device with an emergency light function according to claim 1, wherein the plurality of emergency LEDs display symbols and / or characters on the illumination surface in an emergency.

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