KR200342039Y1 - Active Circuit Of Lamp - Google Patents

Abstract

The present invention relates to a driving circuit for a lamp for controlling the operation of the various lamps, such as fluorescent lamps and incandescent lamps, the lamp circuit unit is provided with a lamp, the power supply unit for supplying power to the lamp; A bias voltage output unit configured to output a bias voltage that varies according to a resistance value of the photoelectric conversion element when a peripheral illumination is changed; An on / off switching unit for supplying and cutting off power to the lamp circuit unit; When the photoelectric conversion element detects less than a first set illuminance, the output voltage of the bias voltage output unit is applied to the on / off switching unit to turn on the lamp, and the photoelectric conversion element detects an abnormality of the second set illuminance. An off delay unit for applying an output voltage of the bias voltage output unit for a set time to delay the extinction of the lamp; Hysteresis that cuts off the output voltage of the bias voltage output unit when the on / off switching unit is turned on to cut off the on / off switching unit when the photoelectric conversion element detects an abnormality of the second set illuminance set higher than the first set illuminance. Characterized in that it comprises a; hysteresis portion to have a width.

Description

Active Circuit Of Lamp

The present invention relates to a driving circuit of a lamp, and more particularly to a driving circuit for a lamp for controlling the operation of the various lamps, such as fluorescent lamps and incandescent lamps.

In general, a method of controlling lamps such as fluorescent lamps and incandescent lamps installed in homes, offices, and roads has been mainly used by a human manual operation.

Recently, a circuit has been developed and used to automatically turn on a lamp when a detected illuminance is less than a set illuminance after detecting peripheral illuminance using a photoelectric conversion element whose resistance value varies depending on the intensity of incident light.

U.S. Patent Nos. 5, 439 and 373 are known as a technique for automatically turning on and off a lamp in accordance with ambient light. According to this patent, a photoelectric conversion element and a resistor are connected in series to output a high level bias voltage when the peripheral illuminance is lower than a set illuminance, and a trigger signal is generated when the transistor, a switching element, is turned on according to the output bias voltage. In response to this trigger signal, the thyristor is brought into a conductive state to supply power to the lamp to be turned on.

However, in the conventional technique, when the lamp is turned on because the ambient illumination is below the set illuminance, the light of the lamp is incident on the photoelectric conversion element, and the lamp is turned off again, and when the lamp is turned off, the photoelectric conversion element is again turned on. An error was detected that the setting illuminance was detected and the lamp was repeatedly turned on.

Therefore, in order to suppress the occurrence of the error, the applicant sets a wide hysteresis width in Utility Model Registration Application No. 2000-0004982 so that the lamp is automatically turned on so that the lamp does not turn off again after the illumination is turned below the set illuminance. / Light-off circuit was proposed, the utility model registration application 2002-0010034 proposed a lighting device to which the circuit is applied.

However, the lamp operates correctly under an ideal state, but if the lamp is actually used in a home or the like, the lamp still turns off when a person approaches or suddenly changes the illuminance of the lamp while the lamp is turned on.

In addition, when the user arbitrarily cuts off the power while the lamp is turned on, the lamp is turned off immediately and there is a problem in that nothing can be done.

In addition, when the conventional circuits as described above are applied to the lamp circuit as it is, there is also a problem that shorten the life of the lamp in the long term by repeating the point of the lamp.

Therefore, to solve such a problem, the object of the present invention is to automatically turn on and off the lamp according to the brightness of the surroundings, the lamp to maintain the lighting of the lamp for a certain time when the lamp should be turned off It is to provide a driving circuit of.

Another object of the present invention is to provide a driving circuit of a lamp that operates stably without repeating lighting and turning off in response to transient external environmental changes and noise.

Another object of the present invention is to provide a driving circuit of the lamp that can extend the life of the lamp itself.

1 is a view showing a driving circuit of a lamp according to the present invention.

FIG. 2 is a view illustrating a hysteresis width when the lamp of FIG. 1 is turned on and off.

3 is a voltage timing flowchart of the driving circuit of the lamp according to FIG. 1;

Figure 4 is a schematic front view of a lamp device provided with a driving circuit of the lamp according to the present invention.

FIG. 5 is a schematic view of a key operation unit in the on operation of the lamp device of FIG. 4; FIG.

6 is a schematic view of a key operation unit in the off operation in the lamp device of FIG.

*** Explanation of symbols for main parts of drawing ***

100: power supply 105: constant voltage

110: power display unit 112: light emitting diode

120: bias voltage output unit 122: photoelectric conversion element

130: extinguishing delay section 140: hysteresis section

150: on / off switching unit 160: lamp circuit unit

162: lamp

The present invention relates to a driving circuit of a lamp, the lamp circuit unit provided with a lamp, the power supply for supplying power to the lamp; A bias voltage output unit configured to output a bias voltage that varies according to a resistance value of the photoelectric conversion element when a peripheral illumination is changed; An on / off switching unit for supplying and cutting off power to the lamp circuit unit; When the photoelectric conversion element detects less than a first set illuminance, the output voltage of the bias voltage output unit is applied to the on / off switching unit to turn on the lamp, and the photoelectric conversion element detects an abnormality of the second set illuminance. An off delay unit for applying an output voltage of the bias voltage output unit for a set time to delay the extinction of the lamp; Hysteresis that cuts off the output voltage of the bias voltage output unit when the on / off switching unit is turned on to cut off the on / off switching unit when the photoelectric conversion element detects an abnormality of the second set illuminance set higher than the first set illuminance. Characterized in that it comprises a; hysteresis portion to have a width.

With reference to the accompanying drawings, the driving circuit of the lamp according to the present invention will be understood by the embodiments described in detail below.

1 is a view illustrating a driving circuit of a lamp according to the present invention, FIG. 2 is a view illustrating a hysteresis width when the lamp is turned on and off according to FIG. 1, and FIG. 3 is a view of the lamp according to FIG. 1. 4 is a schematic front view of a lamp device provided with a driving circuit of a lamp according to the present invention, and FIG. 5 is a schematic diagram of a key operation unit during on-operation in the lamp device of FIG. FIG. 6 is a schematic diagram of a key operation unit in the off operation in the lamp device of FIG.

1 and 2, the driving circuit of the lamp according to the present invention includes a power supply unit 100, a constant voltage unit 105, a power display unit 110 having an LED 112, and a photoelectric conversion element 122. The bias voltage output unit 120, the extinguishing delay unit 130, the hysteresis unit 140, the on / off switching unit 150, the ramp circuit unit 160 and the inverting unit 170.

The power supply unit 100 is a circuit that receives the AC power (AC) to rectify and smooth to generate a DC power. Of course, it is also preferable to configure to supply directly using a DC power source such as a battery.

The voltage output from the power supply unit 100 passes through the constant voltage unit 105 to supply stable DC power to the bias voltage output unit 120. In this case, the constant voltage unit 105 is configured using a regulator IC 106 or a zener diode (ZD), which is a voltage adjusting element, to induce a constant voltage, and thus the power display unit according to the change in the supply voltage from the power supply unit 100. In order to supply stable power to the 110 and the bias voltage output unit 120, the power supply unit 100 is positioned between the power supply unit 100, the power display unit 110, and the bias voltage output unit 120.

The bias voltage output unit 120 operates by receiving power from an output terminal of the power supply unit 100. The bias voltage output unit 120 is a device in which a resistance value is changed according to incident light. It is connected to the ground resistor R3 through the photoelectric conversion element 122 and the resistor R2, and at the connection point A, a bias voltage of a predetermined level is output according to the resistance value of the photoelectric conversion element 110, which is an inverter. In the device INV1, the voltage is configured to be inverted and output.

The extinguishing delay unit 130 is connected to the ground capacitor (C3) and the resistor (R4) for a predetermined time to charge the voltage applied from the output terminal of the bias voltage output unit 16 and flows only the current in the forward direction When the diode D1 for outputting is connected to the lamp 162 of the lamp circuit unit 160 while the lamp 162 of the lamp is turned on, the illumination resistance of the photoelectric conversion element 122 decreases, so that the internal resistance of the photoelectric conversion element 122 is supplied to the lamp circuit unit 160. The power is supplied for a predetermined time, that is, a delay time, to delay the extinction.

The discharge time T at which the voltage charged in the capacitor C1 of the extinguishing delay unit 130 is discharged through the resistor R4 is

It is determined by the time constant of. Such extinguishing delay time is preferably set within 5 to 10 seconds. With this configuration, even when the peripheral illumination is momentarily increased and the internal resistance value of the photoelectric conversion element 122 decreases, the lamp 162 is turned off by a delay for a certain time to maintain the lighting and then to be turned off. .

When the voltage is applied from the output terminal of the extinguishing delay unit 130, the inverting unit 170 is distributed by inverting through one or more inverter elements INV3 to INV4 to invert and output the same.

The on / off switching unit 150 is composed of a resistor R6, a diode D3, and a transistor Q1 to turn on or off the lamp circuit unit 160 when a voltage is applied from the inverting unit 170. When the output terminal of the inverting unit 170 is connected to the base of the transistor Q1 and the transistor Q1 is turned on, the lamp 162 of the lamp circuit unit 160 is turned off, and when the transistor Q1 is shut off, the lamp is turned off. The lamp 162 of the circuit unit 160 is turned on. The diode D3 is inserted to prevent current from flowing backward from the collector of the transistor Q1 toward the base when the output of the inverting unit 170 is low (L).

The lamp circuit unit 160 is configured by mounting a known lamp driving circuit such as a Royer circuit. When the transistor Q1 of the on / off switching unit 150 is turned on, the resistor R7 is applied. By removing the power supplied through the circuit to turn off the transistor (Q2) to turn on the lamp 162, when the transistor Q1 is cut off, the power supplied through the resistor (R7) is put into the base of the transistor (Q2). The transistor Q2 is turned on to turn off the lamp 162.

The hysteresis unit 140 is a type in which an inverter INV2, a resistor R5, and a reverse diode D3 are connected in series, and the connection point B and the bias voltage output unit 120 of the output terminal of the extinguishing delay unit 130 are connected. The node is connected to the connection point (A) of), and when the lamp 162 of the lamp circuit unit 160 is turned on, the output voltage of the connection point (A) of the bias voltage output unit 120 is lowered so that the photoelectric conversion element (110) Has a hysteresis width so as not to output the trigger signal when detecting an abnormality of the second set illuminance set higher than the first set illuminance.

In this configuration, when the peripheral illuminance becomes less than or equal to the first set illuminance BR1, the inverter INV1 outputs a high potential and passes through the extinguishing delay unit 130 and the inverting unit 170 to turn on / off the switching unit ( When the lamp 162 of the lamp circuit unit 160 is turned on so that the transistor Q1 of 150 is turned off, the inverter INV2 outputs a low potential, and the resistor R5 of the inverter INV2 is turned off. Grounding through the output terminal lowers the output voltage of the bias voltage output unit 120.

In this case, when the peripheral illuminance becomes equal to or higher than the second set illuminance BR2, the threshold voltage is applied to the input terminal of the inverter INV1, which is the connection point A, and the inverter INV1 receives a low potential. And the transistor Q1 of the on / off switching unit 150 is turned on so that the lamp 162 of the lamp circuit unit 160 is turned off, and the inverter INV2 outputs a high potential to output the resistor R5. The output voltage of the bias voltage output unit 120 rises without being grounded.

The first set roughness BR1 described above is set to the value of the resistor R2 (R3), and the second set roughness BR2 is set to the value of the resistor R5 while the first set roughness BR1 is set. As a result, the hysteresis width BR2-BR1 is changed to the values of the resistors R2, R3, and R5.

In addition, although the resistor R5 has a fixed resistance value as shown and described as an example, it can be seen that the hysteresis width can be arbitrarily adjusted in design when the resistor R5 is used as a variable resistor. .

Hereinafter, the voltage timing flow of the connection point A, the connection point B, the output terminal of the inverter element INV1 and the output terminal of the inverter element INV3 will be described with reference to FIGS. 1 and 3.

When the voltage of the connection point A of the bias voltage output unit 120 is in the Low (L) state, the lamp is turned on, and the output terminal and the connection point B of the inverter element INV1 are in the High (H) state. The output terminal of the inverter element INV3 is in a Low (L) state, and it can be seen that the lamp 162 is stably lit. (Time: t1)

At this time, when light is incident from the outside to the photoelectric conversion element, that is, when the peripheral illumination becomes high, the voltage of the connection point A is switched to the High (H) state and the output terminal of the inverter element INV1 is set to the Low (L) state. It can be seen that the connection point B is gradually switched from the high (H) state to the low (L) state for a time T by the time constant. Accordingly, it can be seen that the output terminal of the inverter element INV3 maintains the Low (L) state so that the lamp 162 is turned on. (Time: t2 = delay time T)

In this state, when the time T passes, the voltage of the connection point A becomes high (H), and the output terminal of the inverter element INV1 also becomes low (L) in the connection point B while the output terminal of the inverter element INV1 is low. The output terminal of the inverter element INV3 is switched to the high (H) state to turn off the lamp 162. (Time: t3)

When the external illuminance is lowered again, the voltage at the connection point A of the bias voltage output unit 120 is switched to the Low (L) state, and the output terminal and the connection point B of the inverter device INV1 are in the High (H) state, It can be seen that the output terminal of the inverter device INV3 is switched to the low (L) state so that the lamp 162 is turned on. (Time: t4)

In this situation, if the sudden change in ambient illuminance within 1 to 3 seconds due to an external sudden change of situation, the voltage at the connection point (B) drops slightly to the low (L) state, but after that moment the original high ( H), the output terminal of the inverter device INV3 maintains the Low (L) state as it is, and thus the lamp 162 is stably turned on without being turned off. (Time: t5)

Hereinafter, the operation of the driving circuit of the lamp according to the present invention having the configuration as described above will be described.

First, FIG. 4 is a diagram illustrating a case in which the lamp driving device 200 equipped with the driving circuit of the lamp according to the present invention is set to the automatic mode, and the lamp driving device 200 has the key operation unit 210 at the bottom thereof. A waveguide (not shown) is formed and two through holes are formed. The rotary type key selects the automatic, on and off modes of the lamp. The light emitting diode 112 and the photoelectric conversion are provided through the two through holes in the automatic mode. When the device 122 is exposed to the outside and the light emitting diode 112 and the photoelectric conversion element 122 are not exposed to the outside while the light paths are blocked from each other, the light emitting diode 112 and the photoelectric device are turned off in the off mode. Although the conversion element 122 is not exposed to the outside, light paths are formed through each of the waveguides.

When the key operation unit 210 is set to the automatic mode (Auto), the light emitting diode 112 and the photoelectric conversion element 122 are exposed to the outside, or only the photoelectric conversion element 122 is exposed to the outside.

In this case, the resistance value of the photoelectric conversion element 122 of the bias voltage output unit 120 is variable according to the ambient illumination, and when the brightness is bright, that is, when the ambient illumination is high, the resistance value of the photoelectric conversion element 122 is low, When the potential of the connection point A becomes High (H), and therefore the output of the inverter element INV1 is inverted when the input of the inverter element INV1 is High (H), it becomes Low (L). Since the voltage charged in C1 is discharged, the potential of the connection point B becomes Low (L), and the input of the inverter elements INV3 to INV6 of the inverting unit 170 is Low (L), so the inverter elements INV3 to INV6. ) Is inverted to High (H), the voltage is applied to the base of the transistor Q1 through the resistor (R6) and diode (D3) to turn off the lamp 162 of the lamp circuit unit 160.

At this time, the voltage charged in the capacitor C1 of the extinguishing delay unit 130 is discharged for a predetermined time, even if the peripheral illuminance is instantaneously increased, so that the internal resistance value of the photoelectric conversion element 122 becomes small, the lamp 162. The lamp is turned off after the lamp itself is kept on for a certain time.

In the dark, i.e., when the peripheral illuminance is low, the resistance value of the photoelectric conversion element 122 becomes high, and the potential of the connection point A becomes Low (L), so that the input of the inverter element INV1 becomes Low (L). ), The output of the inverter element INV1 is inverted to High (H), the voltage is charged to the capacitor C1, the potential of the connection point B is High (H), the inverter element of the hysteresis unit 140 Since the input potential of (INV2) is high (H), the output of the inverter element (INV2) is inverted to a low (L) state so that current flows through the diode (D1) and the resistor (R5) so that the potential of the connection point (A) falls. do.

At this time, since the input potential of the inverting unit 170 is High (H), the output of the inverting unit 170 is inverted to Low (L) so that the transistor Q1 is blocked through the resistor R6 and the diode D3, The transistor Q2 is turned on to turn on the lamp 162 of the lamp circuit unit 160.

FIG. 5 is a view showing an operation state of the key operation unit during the on operation of the lamp device. When the key operation unit 210 is set to the on mode, the light emitting diode 112 and the photoelectric conversion element 122 are exposed to the outside. If the photoelectric conversion element 122 is not exposed to the outside, the light paths are not formed. Therefore, the photoelectric conversion element 122 does not detect the light, and thus the on / off switching unit 150 is cut off, and thus the power of the power supply unit 100 is applied to the lamp circuit unit 160 so that the lamp 162 may be used. Lights up continuously.

Meanwhile, according to FIG. 6, when the key operation unit 210 is set to the off mode, the light emitting diode 112 and the photoelectric conversion element 122 are not exposed to the outside, and the light path is set through the waveguide formed under the handle. As a result, the photoelectric conversion element 122 always detects the light output from the light emitting diode 112. Accordingly, the on / off switching unit 150 is in a conducting state, and thus the power supply unit 100 is connected to the lamp circuit unit 10. Since no power is applied to the lamp 162, the lamp 162 continues to be turned off.

Although the embodiments of the present invention have been described in detail as described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

As can be seen from the above description, according to the present invention, the lamp is kept on even after various errors and sudden changes in illuminance that may occur during lighting by the light-off delay unit to prevent the lamp from repeatedly turning on and off. can do.

In addition, the light is reflected by a sudden situation change such as when a person passes in front of the lamp during the lighting, thereby preventing the lamp from turning on and off, thereby extending the life of the lamp in the long term.

In addition, even if the lamp is artificially turned off, there is an effect that other things can be done during the set delay time to delay the turning off during the set time of 5 to 10 seconds.

Claims (7)

In the lamp circuit unit provided with a lamp, A power supply unit supplying power to the lamp; A bias voltage output unit configured to output a bias voltage that varies according to a resistance value of the photoelectric conversion element when a peripheral illumination is changed; An on / off switching unit for supplying and cutting off power to the lamp circuit unit; When the photoelectric conversion element detects less than a first set illuminance, the output voltage of the bias voltage output unit is applied to the on / off switching unit to turn on the lamp, and the photoelectric conversion element detects an abnormality of the second set illuminance. An off delay unit for applying an output voltage of the bias voltage output unit for a set time to delay the extinction of the lamp; Hysteresis that cuts off the output voltage of the bias voltage output unit when the on / off switching unit is turned on to cut off the on / off switching unit when the photoelectric conversion element detects an abnormality of the second set illuminance set higher than the first set illuminance. Hysteresis to have a width; The driving circuit of the lamp, characterized in that comprises a. The method of claim 1, And a constant voltage unit for inducing a voltage output from the power supply unit to the bias voltage output unit as a constant voltage. The method of claim 1, And a power display unit for confirming whether power is supplied to the power supply unit. The method of claim 1, And said extinguishing delay section comprises a resistor and a grounding capacitor for setting said delay time using RC time constant. The method of claim 1, wherein the on / off switching unit And a transistor for turning on / off the lamp circuit unit. The method of claim 5, And a diode at the base of the transistor to block reverse current from the collector terminal of the transistor. The method of claim 1, The power supply unit DC power supply (DC); driving circuit of the lamp, characterized in that for supplying.