JP3207346B2 - Light emitting device using inverter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a light emitting device using the inverter equipment for converting a DC voltage into an AC voltage.

[0002]

2. Description of the Related Art Conventionally, as a light emitting device using an inverter device, for example, there is a light emitting circuit that emits electroluminescence. As shown in FIG. 3, the circuit configuration of the light emitting circuit Aa is as follows. That is, the electroluminescence Ea as the light emitting means is connected to the positive side and the negative side of the battery Ba of DC 3.0 V via the inverter circuit Ia as the converting means. Then, the DC voltage from the battery Ba is converted into an AC voltage by the inverter circuit Ia, and the AC voltage is applied to the electroluminescence Ea.
The electroluminescence Ea is turned on.

Here, the inverter circuit Ia will be described. The high potential side terminal P1a connected to the positive side of the battery Ba and the low potential side terminal P2a connected to the negative side of the battery Ba.
, The first and second resistors R1a, R2a and the ceramic capacitor C1a are connected in series. The base of a transistor Qa as a switching element is connected between the second resistor R2a and the ceramic capacitor C1a, and the collector thereof is connected to the high potential side terminal P1a. And, by the ceramic capacitor C1a,
This prevents switching noise from entering the base of the transistor Qa.

The emitter of the transistor Qa is connected to a primary winding N1a of a transformer Ta, and one end (lower side in FIG. 3) of the primary winding N1a is connected to the low potential side terminal P2a. . The other end (the upper side in FIG. 3) of the primary winding N1a is connected to the negative side of the electrolytic capacitor C2a, and the positive side of the capacitor C2a is connected between the first resistor R1a and the second resistor R2a. ing. Both ends of the secondary winding N2a of the transformer Ta are connected to the electroluminescence Ea via first and second output terminals P3a and P4a.

The resistance value of the first resistor R1a is 3.
6KΩ, the resistance value of the second resistor R2a is 560Ω, the capacitance of the ceramic capacitor C1a is 0.015 μF, and the capacitance of the electrolytic capacitor C2a is 10 μF.

Therefore, in the conventional light emitting circuit Aa configured as described above, the base of the transistor Qa is connected from the positive side of the battery Ba to the high potential side terminal P1a and the first and second resistors R1a and R2a. When a DC voltage of 0.65 V or more is applied (arrow 1a shown in FIG. 3), the transistor Qa is turned on. Then, the DC current from the battery Ba passes through the collector-emitter path of the transistor Qa via the high potential side terminal P1a, and the primary winding N of the transformer Ta.
It flows to the negative side of battery Ba (arrow 2a shown in FIG. 3) via one end of 1a and low potential side terminal P2a. Then, a voltage is induced in the winding Sa of the primary winding N1a of the transformer Ta by a mutual induction action, and the transistor Qa is connected to the other end of the primary winding N1a of the transformer Ta, the electrolytic capacitor C2a, and the second resistor R2a. (The arrow 3 shown in FIG. 3)
a) Therefore, the ON state of the transistor Qa continues to be maintained. Then, a DC current higher than the DC current amplification factor flows to the base of the transistor Qa, so that the transistor Qa is turned ON / OFF at an extremely short cycle (2 kHz to 3 kHz).
The OFF operation is repeated. That is, the polarity of the primary winding N1a of the transformer Ta is inverted by the ON / OFF cycle of the transistor Qa, and an AC voltage is generated in the same primary winding N1a according to the principle of the Loyer oscillation circuit. This AC voltage is boosted by the secondary winding N2a of the transformer Ta, and the boosted AC voltage is applied to the electroluminescence Ea.
To turn on the electroluminescence Ea.

In recent years, there has been a demand that the light emitting circuit Aa having the inverter circuit Ia described above is used to make the electroluminescence Ea blink, instead of lighting. became. Therefore,
Conventionally, a control circuit having a timer function is incorporated in the inverter circuit Ia in order to make the electroluminescence Ea blink, and an AC voltage output from the inverter circuit Ia is intermittently applied to the electroluminescence Ea by the control circuit. I was trying to do it.

[0008]

However, in the conventional light emitting circuit Aa, the AC voltage is intermittently turned ON / OFF from the inverter circuit Ia.
An extra control circuit having a timer function was required to blink a. Therefore, there is a problem that the manufacturing cost of the inverter device is significantly increased. In addition, there is a problem that the cost of the light emitting device as a whole increases with the cost of the inverter device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a light-emitting device capable of turning on and off a light-emitting means using an inverter device at a low cost.

[0010]

According to the first aspect of the present invention, a first resistor and a second resistor are connected in series to a positive side of a power supply.
And a switching element on the negative side of the second resistor.
Connected to the switching element and the second resistor plus
An inverter device having a conversion means for converting a DC voltage into an AC voltage by a circuit configuration connected with a capacitor and outputting the same, and a light emitting means for emitting light by the AC voltage output from the conversion means of the inverter device Light-emitting device, wherein the charge from the power supply is connected through a first resistor.
The capacitor can be charged by the capacitor, and the capacitor has discharged.
At that time, the voltage switches through the second resistor.
When the element is turned on and the capacitor is being charged,
Is the first so that the switching element is turned off.
And the resistance value of the second resistor and the capacitance of the capacitor are predetermined.
The gist is that the conversion means outputs the AC voltage intermittently so that the light emitting means can blink. Therefore, according to the first aspect of the invention, when the AC voltage is output intermittently by the conversion means,
The light emitting means blinks. Also, the capacitor is discharged
Then, the switching element is turned on and the AC voltage is output.
You. On the other hand, when the capacitor is charged, the switching element
The child is turned off, and the AC voltage is not output.

[0011]

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a light emitting circuit for emitting electroluminescence will be described below with reference to the drawings. The light emitting circuit A of this embodiment is basically the same as the circuit configuration described in the related art.

As shown in FIG. 1, first and second resistors R1, R2 provided in an inverter circuit I as conversion means are provided.
2, ceramic capacitor C1 and electrolytic capacitor C2
Is different from the standard used in the prior art. That is, as shown in Table 1 below, the first resistor R1 is larger than the resistance value of the conventional example and the second resistor R2
Is smaller than the resistance value of the conventional example. That is,
The resistance value of the first resistance value R1 is four times the resistance value of the conventional example, and the resistance value of the second resistance R2 is about 1/47 times the resistance value of the conventional example. And each resistor R1
, R2 is 750: 1.

The capacitance of the ceramic capacitor C1 is the same, while the capacitance of the electrolytic capacitor C2 is increased. That is, the capacity of the electrolytic capacitor C2 is 22 times as large as that of the conventional example.

[0016]

[Table 1] Next, the operation of the light emitting circuit according to the present embodiment configured as described above will be described.

From the positive side of the battery B to the high potential side terminal P1,
A direct current flows to the low potential side terminal P2 via the first resistor R1 and the electrolytic capacitor C2 (arrow 1b shown in FIG. 1), and the electrolytic capacitor C2 is charged until the electric charge becomes about 0.65V or more. When the charged electric charge reaches 0.65 V, a discharge current of about 0.65 V or more flows from the electrolytic capacitor C2 to the base of the transistor Q through the second resistor R2 (arrow 2b shown in FIG. 1), Q is O
N. Then, the DC current from the battery B passes through the collector-emitter path of the transistor Q via the high-potential terminal P1, passes through one end of the primary winding N1 of the transformer T, and the low-potential terminal P2. It flows to the minus side (arrow 3b shown in FIG. 3). Then, a voltage is induced in the winding S of the primary winding N1 of the transformer T by mutual induction, and the other end of the primary winding N1a of the transformer Ta and the electrolytic capacitor C
2 flows through the second resistor R2 to the base of the transistor Q (arrow 4b shown in FIG. 1).
The N state continues to be maintained. That is, according to the principle of the Loyal oscillation circuit described in the prior art, a DC current of a DC current amplification factor or more flows between the bases of the transistor Q.
The F operation is repeated, and an AC voltage is generated in the primary winding N1 of the transformer T. This AC voltage is applied to the transformer T
, And the boosted AC voltage is applied to the electroluminescence E, and the electroluminescence E is turned on.

On the other hand, when the voltage charged in the electrolytic capacitor C2 becomes about 0.55 V or less due to the discharge of the electrolytic capacitor C2, the discharge from the electrolytic capacitor C2 is stopped, and the electrolytic capacitor C2 is charged. Transition to state. That is, when the electrolytic capacitor C2 is charged, no DC voltage is applied to the base of the transistor Q, and the transistor Q is turned off, so that no AC voltage is generated in the primary winding N1 of the transformer T. Therefore, no AC voltage is applied to the electroluminescence E, and the electroluminescence E is turned off. Thereafter, when the electrolytic capacitor C2 is charged again at about 0.65 V or more, the operation is repeated as described above until the electrolytic capacitor C2 is discharged to about 0.55 V or less. The interval at which the electrolytic capacitor C2 charges and discharges is 20 mS.

Therefore, if the electrolytic capacitor C2 is discharged, an AC voltage is generated in the transformer T by the principle of the Loyer oscillation circuit, and the electroluminescence E is turned on. On the other hand, if the electrolytic capacitor C2 is charged, no AC voltage is generated in the transformer T,
The electroluminescence E is turned off. That is, the electroluminescence E blinks at an interval of 20 .mu.S, which is the same as the interval at which the electrolytic capacitor C2 charges and discharges.

This embodiment has the following effects (1) to (4). (1) The inverter circuit I is exactly the same as the circuit components shown in the prior art, and only the resistance values of the first and second resistors R1 and R2 and the capacitance of the electrolytic capacitor C2 are changed.
An AC voltage was intermittently applied to the electroluminescence E. Therefore, it is possible to prevent a significant increase in the manufacturing cost of the inverter circuit I.

(2) Since an extra control circuit having a timer function for intermittently applying an AC voltage to the inverter circuit I is not added, the inverter circuit I can be simplified. At the same time, since a control circuit having a timer function is not excessively mounted on the inverter circuit I,
An increase in the number of parts can be prevented, and the first and second resistors R1,
It is possible to prevent a substrate (not shown) for mounting the R2, the electrolytic capacitor C2, and the like from becoming large. As a result, an increase in the size of the entire inverter circuit I can be prevented.

(3) The inverter circuit I has exactly the same circuit components as those shown in the prior art, and the first and second resistors R
1, It is only necessary to change the resistance value of R2 and the capacitance of electrolytic capacitor C2. Therefore, the first and second resistors R1, R2
2, ceramic capacitor C1, electrolytic capacitor C2,
Since the electroluminescence E can be turned on and off without changing the connection between the transistor Q and the transformer T, the specification of the light emitting circuit A can be easily changed.

(4) Since the manufacturing cost of the inverter circuit I can be prevented from increasing significantly, the manufacturing cost of the entire light emitting circuit A can also be prevented from increasing significantly. Moreover, since the inverter circuit I can be simplified and the size thereof can be prevented with the reduction in the number of parts,
The light-emitting circuit A can be simplified, and an increase in size can be prevented.

The present invention may be configured as follows in addition to the above embodiment. (A) In the above embodiment, each resistor R is connected to the high potential side terminal P1.
1 and R2, the positive side of the ceramic capacitor C1 is connected.
The negative side of 1 was connected. In addition to this circuit configuration, for example, as shown in FIG. 2, the plus side of the ceramic capacitor C1 is connected between the high-potential terminal P1 and the first resistor R1, and the second resistor R1 and the transistor Q1 are connected. The negative side of the ceramic capacitor C1 may be connected to the base of the capacitor C1. Further, the ceramic capacitor C1 may be omitted. With this configuration, it is possible to further prevent the manufacturing cost of the inverter circuit I from increasing.

(B) In the above embodiment, the light emitting circuit A for emitting the electroluminescence E is embodied, but emits light when an AC voltage is applied, such as an incandescent lamp or a fluorescent lamp. If so, it can be embodied in any light emitting circuit A.

(C) In the above embodiment, the battery B is used as a power source for blinking the electroluminescence E, but a solar battery may be used instead of the battery B. With this configuration, the maintenance of replacing the battery B can be omitted. Alternatively, the battery B and a solar battery may be used in combination. According to this configuration, the power of the solar battery is stored in the daytime and the battery is discharged at night, so that the consumption of the battery B can be reduced. At the same time, even if the amount of power stored by the solar battery is insufficient, power can be supplied from the battery B to the electroluminescence E, so that the electroluminescence E can be surely flickered.

(D) In the above embodiment, the first resistor R1
The resistance value of the second resistor R2 is 9.0 KΩ and the resistance value of the second resistor R2 is 12 KΩ.
Although Ω is used, the value is not limited to this value and can be freely changed. Specifically, the first resistor R1 is set to 5.0 KΩ as a range that each resistance value can take.
.About.40.0 K.OMEGA. And the second resistor R2 can be set to 5.about.24 .OMEGA .. That is, the ratio of the resistance values of the resistors R1 and R2 may be set to 208 to 8000. Further, as a desirable range of each resistance value, the first resistance R1 is set to be from 9.0 KΩ to 2 KΩ.
0.0 KΩ and the second resistor R2 can be set to 12 to 20Ω. That is, the ratio of the resistance values of the resistors R1 and R2 may be 750 to 1667. Further, as an optimum range of each resistance value, the first resistor R1 is set to 15.0 KΩ to
18.0 KΩ and the second resistor R2 can be set to 15 to 18Ω. That is, the ratio of the resistance values of the resistors R1 and R2 may be set to 1000 to 1200.

(E) In the above embodiment, the capacity of the electrolytic capacitor C2 is set to 220 μF. However, if the blinking interval (20 mS) of the electroluminescence E is desired to be long,
If it is 0 μF or more and the blinking interval should be short, 220 μF
It may be less than F. Further, without being limited to this numerical value, the numerical value can be freely changed. Specifically, the possible range is 100 to 400 μF, the desirable range is 150 to 300 μF, and the optimal range is 18 to 300 μF.
It is possible to take values from 0 to 250 μF.

(F) The second resistor R2 shown in the above embodiment
It is also possible to change only the resistance value (9.0 KΩ) of the first resistor R1 without changing the resistance value of the first capacitor R2 and the capacitance of the electrolytic capacitor C2. With this configuration, it is possible to change the turn-off time of the electroluminescence E.
That is, when the resistance value of the first resistor R1 is set to a value larger than 9.0 KΩ, the light emission time of the electroluminescence E can be extended, and when the resistance value is small, the light emission time of the electroluminescence E can be shortened. .

(G) The first resistor R1 shown in the above embodiment
It is also possible to change only the resistance value (12Ω) of the second resistor R2 without changing the resistance value of the second resistor R2 and the capacitance of the electrolytic capacitor C2. According to this configuration, the lighting time of the electroluminescence E can be changed. That is, if the resistance value of the second resistor R2 is set to a value larger than 12Ω, the lighting time of the electroluminescence E can be lengthened, and if the resistance value is set to a small value, the lighting time of the electroluminescence E can be shortened.

(H) The electrolytic capacitor C can be used without changing the first and second resistors R1 and R2 shown in the above embodiment.
It is also possible to change only the capacitance of No. 2 (220 μF). With this configuration, the electroluminescence E flashes for a period of time (20 ms: time from turning on to turning off).
Can be changed. That is, the electrolytic capacitor C
If the capacity of 2 is larger than 220 μF, the blinking time of the electroluminescence E can be lengthened, and if it is smaller, the blinking time of the electroluminescence E can be shortened.

Next, technical ideas other than the claims that can be grasped from the embodiment will be described. (A) The ratio of the resistance values of the first and second resistors is 20
3. The method according to claim 1, wherein the range is from 8 to 8000.
3. The inverter device according to claim 1.

(B) The capacity of the capacitor is 100 to
3. The inverter device according to claim 1, wherein the inverter device has a voltage of 400 μF. (C) The ratio of the resistance values of the first and second resistors is 20
The light emitting device according to claim 3, wherein the light emitting device has a range of 8 to 8000.

(D) The capacitance of the capacitor is 100 to
The light-emitting device according to claim 3, wherein the light-emitting device is set to 400 µF or more. 3. The inverter device according to claim 2, wherein (E) the capacitance value of the capacitor is set such that the switching element cannot be continuously turned on by discharging the capacitor.

[0035]

According to the first aspect of the present invention, the light emitting hand is provided.
Since there is no need to provide a separate circuit for blinking the steps,
An increase in manufacturing cost can be prevented. With it,
The specification of the light emitting device can be easily changed.

Furthermore , since the AC voltage can be output intermittently without changing the circuit connection of the conversion means, the specification of the inverter device can be easily changed.

[0037]

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a light emitting circuit showing one embodiment of the present invention.

FIG. 2 is a circuit diagram of a light-emitting circuit showing another embodiment.

FIG. 3 is a circuit diagram of a light emitting circuit showing a conventional technique.

[Explanation of symbols]

C2: electrolytic capacitor (capacitor), E: electroluminescence (light emitting means), I: inverter circuit (converting means), Q: transistor (switching element), R1
.. The first resistor, R2... The second resistor.

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05B 33/08 H05B 39/04 H05B 41/30-43/02

Claims (1)

(57) [Claims] A first resistor connected directly to a positive side of a power supply;
Connected to the column and switched on the negative side of the second resistor
Switching element, the switching element and the second resistor
Circuit with a capacitor connected between the positive side of
A light emitting device including an inverter device having a converter for converting an AC voltage more DC voltage, and a light emitting unit that emits light by alternating voltage outputted from the conversion means of the same inverter, the power source From the capacitor through the first resistor
When the capacitor discharges, it can be charged more.
The switching element is turned on by the voltage of
N and the switch is
So that the switching element is turned off.
The resistance value of the resistor and the capacitance of the capacitor are set to predetermined values.
It is constant, and the converting means emitting device and outputs the AC voltage in order to enable flashing said light emitting means intermittently.