CN210444534U - Control circuit of non-driven linear projection lamp and projection lamp applying control circuit - Google Patents
Control circuit of non-driven linear projection lamp and projection lamp applying control circuit Download PDFInfo
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- CN210444534U CN210444534U CN201921152389.6U CN201921152389U CN210444534U CN 210444534 U CN210444534 U CN 210444534U CN 201921152389 U CN201921152389 U CN 201921152389U CN 210444534 U CN210444534 U CN 210444534U
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Abstract
The utility model discloses a control circuit of a non-driven linear projection lamp and a projection lamp using the same, belonging to the field of lighting lamps; the constant-current control circuit is used for controlling the constant-current work of the light-emitting module, and specifically comprises a rectifying and filtering module, a main control module and a voltage dividing resistor assembly; the input end of the rectification filter module is used for receiving the input of commercial power, the output end of the rectification filter module is connected with the light-emitting module, and the output end of the light-emitting module is connected with the voltage-dividing resistor component in series and then is connected with the ground to form a working circuit; the main control module is used for regulating and controlling the current of the working circuit to be constant current; compare with current utilization power drive provide the constant current for the projecting lamp, the cost reduction of whole lamp, and the lamp is when the equipment, and the chip directly pastes on the circuit board through the machine, when connecing outside power cord, only need direct access anodal and two lines of negative pole can, compare and connect driving power supply, it is more convenient to work a telephone switchboard.
Description
Technical Field
The utility model relates to an illumination lamps and lanterns field, concretely relates to control circuit of no driven linear projecting lamp and use its projecting lamp.
Background
The projection lamp is a lamp which specifies that the illumination intensity on the illuminated surface is higher than the ambient environment; also known as spotlights. In general, it can be aimed in any direction and has a structure that is not affected by the climatic conditions. The method is mainly used for large-area operation field mines, building outlines, stadiums, overpasses, monuments, parks, flower beds and the like.
The projection lamp generally comprises a light-emitting lamp bead and a driving power supply, wherein the input of commercial power is processed by the driving power supply and then drives the LED lamp to work in a constant current mode; the conventional mode of utilizing the driving power supply to realize the constant-current work of the projection lamp has two defects, the first is that the wiring of the driving power supply is troublesome in the assembling process, and the second is that the cost of the whole lamp is high.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the technology, the utility model provides a non-driven linear projection lamp, which utilizes an IC chip to replace the conventional driving power supply to achieve the aim of normal work of an LED lamp; in the process of assembling the linear projection lamp, the wiring is simple, and the cost of the whole lamp is greatly reduced.
In order to achieve the above object, the present invention provides a control circuit of a non-driven linear projector for controlling a light emitting module to operate at a constant current, which comprises a rectification filter module, a main control module and a voltage dividing resistor assembly; the input end of the rectification filter module is used for receiving the input of commercial power, the output end of the rectification filter module is connected with the light-emitting module, and the output end of the light-emitting module is connected with the voltage-dividing resistor component in series and then is connected with the ground to form a working circuit; the main control module is used for regulating and controlling the current of the working circuit to be constant current.
The voltage dividing resistor assembly comprises a first resistor and a second voltage dividing resistor which are connected in series, the other end of the first resistor is coupled with the light emitting module, and the other end of the second voltage dividing resistor is connected with the ground; the main control module comprises a constant current chip, and the constant current chip comprises a voltage detection pin, a ground and a voltage control pin; the connection point of the light-emitting module and the first voltage-dividing resistor is coupled with the voltage control pin, the connection point of the first resistor and the second voltage-dividing resistor is coupled with the voltage detection pin, and the voltage control pin is coupled with the connection point of the light-emitting module and the first resistor.
The power expansion module comprises an MOS tube and a third resistor; the constant current chip also comprises an MOS tube control pin and a current setting pin; the grid of the MOS tube is connected with the control pin of the MOS tube, and the drain is coupled with the connection point of the light-emitting module and the first resistor; the source electrode is connected with one end of a third resistor, and the other end of the third resistor is connected with the ground.
The constant current chip further comprises an overvoltage protection pin, and the overvoltage protection pin is coupled with a connection point between the light emitting module and the first resistor.
The main control module comprises a plurality of constant current chips, and each constant current chip is connected in parallel; the same pin connecting coupling points of each constant current chip are the same.
The rectification filtering module comprises a power supply positive input pin, a power supply negative input pin, a positive output pin and a negative output pin, the power supply positive input pin is connected with a mains supply positive electrode, the power supply negative input pin is connected with a mains supply negative electrode, the positive output pin is connected with the light-emitting module, and the negative output pin is connected with the ground.
In order to achieve the above object, the present invention also provides a projector, which comprises a housing, a light emitting module and a circuit board accommodated in the housing; the circuit board is provided with the control circuit of the non-driven linear projection lamp.
The light-emitting module comprises at least one lamp bead, when the number of the lamp beads is one, the anode of the lamp bead is connected with the output end of the rectifying and filtering module, and the cathode of the lamp bead is connected with the voltage-dividing resistor component in series; when the number of the lamp beads is more than one, the plurality of lamp beads are all connected in parallel or all connected in series to form a lamp bead group, or the plurality of lamp beads are firstly connected in series to form a series group, and then the plurality of series groups are connected in parallel to form a lamp bead group; the positive pole of lamp pearl group is connected with rectifier filter module's output, and the negative pole of lamp pearl group concatenates with the divider resistance subassembly.
The utility model has the advantages that: the utility model provides a control circuit of a non-driven linear projection lamp, which is used for controlling a light-emitting module to work in a constant current mode and comprises a rectification filtering module, a main control module and a voltage-dividing resistor component; the input end of the rectification filter module is used for receiving the input of commercial power, the output end of the rectification filter module is connected with the light-emitting module, and the output end of the light-emitting module is connected with the voltage-dividing resistor component in series and then is connected with the ground to form a working circuit; the main control module is used for regulating and controlling the current of the working circuit to be constant current; compare with current utilization power drive provide the constant current for the projecting lamp, the cost reduction of whole lamp, and the lamp is when the equipment, and the chip directly pastes on the circuit board through the machine, when connecing outside power cord, only need direct access anodal and two lines of negative pole can, compare and connect driving power supply, it is more convenient to work a telephone switchboard.
Drawings
FIG. 1 is a block diagram of the overall structure of the present invention;
FIG. 2 is a circuit diagram of the present invention;
fig. 3 is a circuit diagram of the external MOS transistor power expansion circuit of the present invention;
fig. 4 is a circuit diagram of the chip parallel extended power circuit of the present invention.
The main element symbols are as follows:
1. a rectification filtering module; 2. a light emitting module; 3. a main control module; 4. a voltage dividing resistor component; LED1 and lamp beads; q1 and MOS tube; VR1, voltage dependent resistor; f1, fuse; u1 and L1015 chips; r3, a first divider resistor; r2 and a second divider resistor; VS, voltage detection pin; d1, a voltage control pin; GD2, MOS tube control pin; CS2, current set pin; OVP, overvoltage protection feet; CX1, capacitance; r1 and a third resistor.
Detailed Description
In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, a control circuit of a non-driven linear projector is used for controlling a light emitting module 2 to work at a constant current, and includes a rectifying and filtering module 1, a main control module 3 and a voltage dividing resistor assembly 4; the input end of the rectification filter module 1 is used for receiving the input of commercial power, the output end is connected with the light-emitting module 2, and the output end of the light-emitting module 2 is connected with the voltage-dividing resistor component 4 in series and then is connected with the ground to form a working circuit; the main control module 3 is used for regulating and controlling the current of the working circuit to be constant current.
Compared with the existing method of utilizing power supply drive to provide constant current for the projection lamp, the IC chip for the whole lamp replaces the whole power supply drive, so that the cost of the whole lamp is greatly reduced; and the lamp is when the equipment, and the chip is direct through the machine pastes on the circuit board, when connecing outside power cord, only need directly insert anodal and two root lines at the lamp plate can, compare and connect driving power supply, need pass through the wire with commercial power and driving power supply earlier and be connected, pass through the wire with driving power supply and lamp plate again and be connected, and it is more convenient to work a telephone switchboard.
Referring to fig. 2, the rectifier and filter module 1 specifically selects an MB10S chip to implement the rectifier and filter function, and converts the commercial power into direct current; the MB10S chip comprises a power supply anode input pin, a power supply cathode input pin, an anode output pin and a cathode output pin, wherein the power supply anode input pin is connected with the positive pole of the commercial power, the power supply cathode input pin is connected with the negative pole of the commercial power, the anode output pin is connected with the light-emitting module 2, and the cathode output pin is connected with the ground; the MB10S chip converts a high-voltage ac power supply, which is supplied from a commercial power source, into dc power, and outputs the dc power from a positive electrode output terminal.
In this embodiment, a fuse F1 is provided between the live wire of the utility power and the positive input terminal of the MB10S chip to protect the whole circuit, and the fuse F1 has the following parameters: 250V 3 AAC; a voltage dependent resistor VR1 is also arranged between the live wire and the zero wire of the commercial power, the model of the voltage dependent resistor VR1 is 10D471, when the voltage applied on the voltage dependent resistor VR1 exceeds the threshold value, the current flowing through the voltage dependent resistor VR increases sharply, and the voltage dependent resistor VR corresponds to a resistor with infinite resistance. That is, when the voltage applied to it is higher than its threshold, it acts as a switch in a closed state, connecting the live and neutral wires, short-circuiting the other electronic components, and acting as a protection circuit.
In this embodiment, the light emitting module 2 is further directly coupled to ground through a capacitor CX1 for filtering out noise that the MB10S chip cannot filter out completely.
Referring to fig. 3, the light emitting module 2 includes at least one lamp bead LED1, when the number of the lamp bead LEDs 1 is one, the anode of the lamp bead LED1 is connected to the output end of the rectifying and filtering module 1, and the cathode of the lamp bead LED1 is connected in series to the voltage dividing resistor assembly; when the number of the lamp bead LEDs 1 is more than one, a plurality of lamp bead LEDs 1 are connected in parallel to form a lamp bead LED1 group, the anode of the lamp bead LED1 group is connected with the output end of the rectifying and filtering module 1, and the cathode of the lamp bead LED1 group is connected in series with the voltage dividing resistor component; in this embodiment, the bead LEDs 1 of the lighting module 2 are connected in series by 24, and in parallel by 3.
In this embodiment, the voltage dividing resistor assembly includes a first resistor and a second voltage dividing resistor R2 connected in series, the other end of the first resistor is coupled to the light emitting module 2, and the other end of the second voltage dividing resistor R2 is connected to ground; the main control module 3 comprises a constant current chip, the specific constant current chip is an L1015 chip U1, and the L1015 chip U1 comprises a voltage detection pin VS, a ground pin and a voltage control pin D1; the voltage control pin D1 is coupled to a connection point between the light emitting module 2 and the first resistor R3, the voltage detection pin VS is coupled to a connection point between the first resistor and the second voltage dividing resistor R2, and the voltage control pin D1 is coupled to a connection point between the light emitting module 2 and the first resistor; the potential difference of the voltage detection end, the voltage control pin D1 and the ground is ensured through the voltage division resistor assembly; when the voltage value detected by the voltage detection pin VS is higher than the rated value, the voltage control pin D1 outputs low voltage, the potential between the light-emitting module and the first resistor R3 is pulled down, and the current value in the circuit is reduced to the rated value; on the contrary, when the voltage value detected by the voltage detection pin VS is lower than the rated value, the voltage control pin D1 outputs high voltage, the potential between the light-emitting module and the first resistor R3 is pulled high, the current value in the circuit rises to the rated value, and the constant current operation of the whole operating circuit is realized.
Referring to fig. 3, the L1015 chip U1 further includes a MOS transistor Q1 control pin GD2 and a current setting pin CS 2; the gate of the MOS transistor Q1 is connected to the control pin GD2 of the MOS transistor Q1, and the drain is coupled to the connection point of the light emitting module 2 and the first resistor; the source electrode is connected with one end of a third resistor R1, and the other end of the third resistor R1 is connected with the ground; the L1015 chip U1 further includes an overvoltage protection pin OVP, and the overvoltage protection pin OVP is coupled to a connection point between the light emitting module 2 and the first resistor.
In this embodiment, the L1015 chip U1 expands power by driving the external MOS transistor Q1, and when the total operating power of the light emitting module is large, the MOS transistor Q1 controls the pin GD2 to output a high level, and the MOS transistor Q1 is turned on, so as to form a circuit in which the first resistor and the second voltage-dividing resistor R2 are connected in series and then connected in parallel with the third resistor R1; the current of the working circuit can also flow to the ground through two branches, and the power of the single L1015 chip U1 is enlarged.
Referring to fig. 4, the manner of expanding the power of the L1015 chip U1 can also be implemented by connecting a plurality of L1015 chips U1 in parallel; the total power that the master control module 3 can bear is equal to the superposition of the power of each chip; when the chips are connected in parallel, the same pin connecting coupling points of each L1015 chip U1 are the same; in this embodiment, the L1015 chip U1 has the advantages of simple peripheral circuit, no magnetic element, and no EMI problem. Meanwhile, an over-temperature protection circuit is integrated in the L1015, the output current is automatically reduced when the junction temperature of the chip exceeds 145 ℃, and the output current is reduced to zero when the junction temperature reaches 160 ℃, so that the driving circuit realized based on the L1015 series is ensured to be always in a safe working state.
The utility model also provides a projection lamp, which comprises a shell and a circuit board arranged in the shell; the circuit board is provided with a control circuit of the non-driven linear projection lamp; the cost is low, and the wiring is convenient during the assembly.
The utility model has the advantages that:
1. the utility model provides a control circuit of a non-driven linear projection lamp, which comprises a rectification filter module, a main control module and a light-emitting module; the input end of the rectification filter module is used for receiving the input of commercial power, the output end of the rectification filter module is connected with the light-emitting module, and the output end of the light-emitting module is connected with the voltage-dividing resistor component in series and then is connected with the ground to form a working circuit; the main control module is used for regulating and controlling the current of the working circuit to be constant current; compared with the existing method of utilizing power supply to drive the projector to provide constant current, the cost of the whole lamp is reduced;
2. when the lamp is assembled, the chip is directly attached to the circuit board through a machine, and when an external power line is connected, only two wires, namely the anode and the cathode, are directly connected, so that the wiring is more convenient compared with the connection with a driving power supply;
3. the L1015 chip can expand power by driving external MOS tubes or in a parallel connection mode.
The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.
Claims (8)
1. A control circuit of a non-driven linear projection lamp is used for controlling a light-emitting module to work in a constant current mode and is characterized by comprising a rectifying and filtering module, a main control module and a voltage dividing resistor assembly; the input end of the rectification filter module is used for receiving the input of commercial power, the output end of the rectification filter module is connected with the light-emitting module, and the output end of the light-emitting module is connected with the voltage-dividing resistor component in series and then is connected with the ground to form a working circuit; the main control module is used for regulating and controlling the current of the working circuit to be constant current.
2. The control circuit of the driverless linear projector as claimed in claim 1, wherein the voltage dividing resistor assembly includes a first resistor and a second voltage dividing resistor connected in series, the other end of the first resistor is coupled to the light emitting module, and the other end of the second voltage dividing resistor is connected to ground; the main control module comprises a constant current chip, and the constant current chip comprises a voltage detection pin, a ground and a voltage control pin; the connection point of the light-emitting module and the first voltage-dividing resistor is coupled with the voltage control pin, the connection point of the first resistor and the second voltage-dividing resistor is coupled with the voltage detection pin, and the voltage control pin is coupled with the connection point of the light-emitting module and the first resistor.
3. The control circuit of the driverless linear projector as recited in claim 2, further comprising a power spreading module, wherein the power spreading module comprises a MOS transistor and a third resistor; the constant current chip also comprises an MOS tube control pin and a current setting pin; the grid of the MOS tube is connected with the control pin of the MOS tube, and the drain is coupled with the connection point of the light-emitting module and the first resistor; the source electrode is connected with one end of a third resistor, and the other end of the third resistor is connected with the ground.
4. The control circuit of the driverless linear projector as recited in claim 3, wherein the constant current chip further includes an overvoltage protection pin, and a connection point between the light emitting module and the first resistor is coupled to the overvoltage protection pin.
5. The control circuit of the driverless linear projector as recited in claim 1, wherein the main control module includes a plurality of constant current chips, each of the constant current chips being connected in parallel with each other; the same pin connecting coupling points of each constant current chip are the same.
6. The control circuit of the undriven linear projector as claimed in claim 1, wherein the rectifying and filtering module comprises a power positive input pin, a power negative input pin, a positive output pin and a negative output pin, the power positive input pin is connected with the positive pole of the commercial power, the power negative input pin is connected with the negative pole of the commercial power, the positive output pin is connected with the light emitting module, and the negative output pin is connected with the ground.
7. The projection lamp is characterized by comprising a shell, a light-emitting module and a circuit board accommodated in the shell; the control circuit of the non-driven linear projector according to any one of claims 1 to 6 is provided on the circuit board.
8. The project lamp of claim 7, wherein the light emitting module comprises at least one lamp bead, when the number of the lamp beads is one, the anode of the lamp bead is connected with the output end of the rectifying and filtering module, and the cathode of the lamp bead is connected with the voltage dividing resistor component in series; when the number of the lamp beads is more than one, the plurality of lamp beads are all connected in parallel or all connected in series to form a lamp bead group, or the plurality of lamp beads are firstly connected in series to form a series group, and then the plurality of series groups are connected in parallel to form a lamp bead group; the positive pole of lamp pearl group is connected with rectifier filter module's output, and the negative pole of lamp pearl group concatenates with the divider resistance subassembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921152389.6U CN210444534U (en) | 2019-07-22 | 2019-07-22 | Control circuit of non-driven linear projection lamp and projection lamp applying control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921152389.6U CN210444534U (en) | 2019-07-22 | 2019-07-22 | Control circuit of non-driven linear projection lamp and projection lamp applying control circuit |
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| CN210444534U true CN210444534U (en) | 2020-05-01 |
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| CN201921152389.6U Active CN210444534U (en) | 2019-07-22 | 2019-07-22 | Control circuit of non-driven linear projection lamp and projection lamp applying control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115150602A (en) * | 2022-08-31 | 2022-10-04 | 深圳市橙子数字科技有限公司 | High-fidelity DLP projector |
-
2019
- 2019-07-22 CN CN201921152389.6U patent/CN210444534U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115150602A (en) * | 2022-08-31 | 2022-10-04 | 深圳市橙子数字科技有限公司 | High-fidelity DLP projector |
| CN115150602B (en) * | 2022-08-31 | 2022-11-08 | 深圳市橙子数字科技有限公司 | High-fidelity DLP projector |
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