Light-emitting driving circuit and lighting equipment

Abstract

The utility model discloses a light-emitting driving circuit and lighting equipment. The light-emitting driving circuit comprises a dimming module and a constant-current module. Adjusting signals with different amplitudes are applied to a current setting end of a constant-current module through a dimming module according to different voltages of a battery module, and the constant-current module adjusts power supply current flowing through a light-emitting module according to the adjusting signals with different amplitudes, so that the brightness of the light-emitting module is adjusted, and the electric energy release rate of the battery module is controlled; the energy-saving effect is achieved, and the problem that the electric quantity of a solar illuminating lamp is insufficient is solved.

Description

Technical Field

[0001] The present application belongs to the field of lighting technology, and in particular, relates to a light-emitting driving circuit and a lighting device. Background Art

[0002] Solar lamps usually generate current to charge batteries when the sun shines on the solar cells during the day. The batteries store enough electricity and then provide power to the light modules through the driving circuit at night. However, current solar lamps generally have the characteristics of insufficient power and short lighting time. For example, the energy supply can be increased by increasing the capacity of solar cells and batteries that store energy, but this method will result in higher costs. Utility Model Content

[0003] The purpose of the present application is to provide a light-emitting driving circuit and a lighting device, aiming to solve the problem of insufficient power in traditional solar lighting lamps.

[0004] A first aspect of an embodiment of the present application provides a light-emitting driving circuit, including a dimming module and a constant current module;

[0005] The input end of the dimming module is connected to the battery module, and the output end of the dimming module is connected to the current setting end of the constant current module. The dimming module is used to apply adjustment signals of different amplitudes to the current setting end of the constant current module when the battery voltage is at different voltage values;

[0006] The input end of the constant current module is connected to the battery module, and the output end of the constant current module is connected to the light-emitting module. The constant current module is used to access the battery voltage provided by the battery module and adjust the power supply current flowing through the light-emitting module according to the adjustment signal. The magnitude of the power supply current corresponds to the amplitude of the adjustment signal.

[0007] In one embodiment, the dimming module includes:

[0008] a switch circuit, connected to the battery module, and configured to detect the battery voltage, output a first voltage when the battery voltage is greater than or equal to a preset voltage, and output a second voltage when the battery voltage is less than the preset voltage;

[0009] An impedance circuit is connected to the switch circuit and the current setting end of the constant current module, and is used to be in a first impedance when connected to the first voltage to apply a first adjustment signal to the current setting end of the constant current module, and to be in a second impedance when connected to the second voltage to apply a second adjustment signal to the current setting end of the constant current module.

[0010] In one embodiment, the switch circuit comprises:

[0011] a first switch element, connected to the battery module, configured to be turned on and output a turn-on voltage when the battery voltage is greater than or equal to the preset voltage, and to be turned off when the battery voltage is less than the preset voltage;

[0012] The first resistor is connected in series with the first switch element, and is used to divide the on-voltage and output the first voltage at the series node, and output the second voltage of 0 voltage when the first switch element is turned off.

[0013] In one embodiment, the first switching element includes a Zener diode, a cathode of the Zener diode is connected to the positive electrode of the battery module, an anode of the Zener diode is connected to one end of the first resistor, the other end of the first resistor is connected to the negative electrode of the battery module, and one end of the first resistor constitutes the series node.

[0014] In one embodiment, the impedance circuit comprises:

[0015] a second resistor connected between the current setting end of the constant current module and the negative electrode of the battery module;

[0016] A third resistor and a second switch element are connected in series and then in parallel with the second resistor;

[0017] A fourth resistor is connected between the series node and the control terminal of the second switch element.

[0018] In one embodiment, the second switch element includes a MOS transistor.

[0019] In one embodiment, the light emitting module includes an LED, the constant current module includes a linear constant current chip, and the linear constant current chip includes:

[0020] An input pin, constituting an input end of the constant current module, connected to the positive electrode of the battery module;

[0021] The LED pin constitutes the output end of the constant current module and is connected to the cathode of the LED, and the anode of the LED is connected to the anode of the battery module;

[0022] The current setting pin constitutes the current setting end of the constant current module and is connected to the impedance circuit.

[0023] In one embodiment, the linear constant current chip further includes:

[0024] A positive power supply pin connected to the positive electrode of the battery module;

[0025] Negative power supply pin, connected to the negative pole of the battery module.

[0026] In one of the embodiments, a diode is further included, wherein an anode of the diode is connected to the input pin, and a cathode of the diode is connected to the positive electrode of the battery module.

[0027] A second aspect of an embodiment of the present application provides a lighting device, comprising a battery module, an LED module and the light-emitting driving circuit as described above, wherein the light-emitting driving circuit is connected to the LED module to drive the LED module to operate.

[0028] Compared with the prior art, the embodiments of the present application have the following beneficial effects: the dimming module applies adjustment signals of different amplitudes to the current setting end of the constant current module according to the different voltages of the battery module, and the constant current module adjusts the power supply current flowing through the light-emitting module according to the adjustment signals of different amplitudes, thereby adjusting the brightness of the light-emitting module, thereby controlling the rate at which the battery module releases electrical energy, achieving energy-saving effects, and improving the problem of insufficient power in solar lighting lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the principle of a light-emitting driving circuit provided in one embodiment of the present application;

[0030] Figure 2 A circuit diagram of a light-emitting driving circuit provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Figure 1 The structure diagram of the light-emitting driving circuit provided in one embodiment of the present application is shown. For the convenience of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0036] The light-emitting driving circuit includes a dimming module 100 and a constant current module 200 .

[0037] The input end of the dimming module 100 is connected to the battery module 10, and the output end of the dimming module 100 is connected to the current setting end of the constant current module 200. The dimming module 100 is used to apply different amplitude adjustment signals to the current setting end of the constant current module 200 when the battery voltage is at different voltage values;

[0038] The input end of the constant current module 200 is connected to the battery module 10, and the output end of the constant current module 200 is connected to the light-emitting module 20. The constant current module 200 is used to access the battery voltage provided by the battery module 10 and adjust the power supply current flowing through the light-emitting module 20 according to the adjustment signal. The magnitude of the power supply current corresponds to the amplitude of the adjustment signal.

[0039] In the embodiment of the present application, the dimming module 100 applies adjustment signals of different amplitudes to the current setting end of the constant current module 200 according to the different voltages of the battery module 10. The constant current module 200 adjusts the power supply current flowing through the light-emitting module 20 according to the adjustment signals of different amplitudes, thereby adjusting the brightness of the light-emitting module 20, thereby controlling the rate at which the battery module 10 releases electrical energy, achieving energy-saving effects, and improving the problem of insufficient power in solar lighting.

[0040] In one example, when the battery voltage is greater than or equal to the preset voltage, the dimming module 100 applies a first adjustment signal to the current setting terminal of the constant current module 200; when the battery voltage is less than the preset voltage, the dimming module 100 applies a second adjustment signal to the current setting terminal of the constant current module 200. The constant current module 200 adjusts the power supply current flowing through the light-emitting module 20 to the first current value according to the first adjustment signal, and adjusts the power supply current flowing through the light-emitting module 20 to the first current value according to the second adjustment signal.

[0041] It is understandable that the regulating signal applied to the current setting end of the constant current module 200 is a current or a voltage, and the amplitude of the regulating signal can be changed by changing the impedance connected to the current setting end of the constant current module 200 .

[0042] In one embodiment, the dimming module 100 includes a switch circuit 110 and an impedance circuit 120 .

[0043] The switch circuit 110 is connected to the battery module 10 and is used to detect the battery voltage, output a first voltage when the battery voltage is greater than or equal to a preset voltage, and output a second voltage when the battery voltage is less than the preset voltage.

[0044] The impedance circuit 120 is connected to the switch circuit 110 and the current setting end of the constant current module 200, and is used to be in a first impedance when connected to a first voltage to apply a first adjustment signal to the current setting end of the constant current module 200, and to be in a second impedance when connected to a second voltage to apply a second adjustment signal to the current setting end of the constant current module 200.

[0045] Among them, one of the first voltage and the second voltage is a valid driving voltage, and the other is an invalid driving voltage. For example, one of the first voltage and the second voltage is a high level signal, and the other is a level signal.

[0046] The constant current module 200 changes the supply current flowing through the light emitting module 20 according to the change of the impedance of the impedance circuit 120. The first impedance and the second impedance correspond to the first current value and the second current value respectively. The first current value is greater than the second current value.

[0047] In one embodiment, the switch circuit 110 includes: a first switch element D1 and a first resistor R1.

[0048] The first switch element D1 is connected to the battery module 10 and is used to be turned on and output a conduction voltage when the battery voltage is greater than or equal to a preset voltage. The first switch element D1 is also used to be turned off when the battery voltage is less than a preset voltage.

[0049] The first resistor R1 is connected in series with the first switch element D1 to divide the on-voltage and output a first voltage at the series node, and output a second voltage of 0 voltage when the first switch element D1 is turned off.

[0050] Exemplarily, when the battery voltage of the battery module 10 is fully charged or the voltage is relatively high (i.e., above the preset voltage), the first switch element D1 is turned on, and the battery voltage is divided by the first switch element D1 and the first resistor R1, and a voltage component, i.e., a first voltage, is output at the series node of the first switch element D1 and the first resistor R1. Exemplarily, when the battery voltage of the battery module 10 is relatively low (i.e., lower than the preset voltage), when the first switch element D1 is turned off, the first switch element D1 and the first resistor R1 have no voltage division output, and therefore the output second voltage is 0.

[0051] In one embodiment, the first switching element D1 includes a Zener diode, the cathode of the Zener diode is connected to the positive electrode of the battery module 10, the anode of the Zener diode is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the negative electrode of the battery module 10, and one end of the first resistor R1 constitutes a series node.

[0052] When the battery voltage of the battery module 10 is above a preset voltage (for example, the reverse breakdown voltage of the Zener diode), the Zener diode is turned on and outputs a conduction voltage; when the battery voltage of the battery module 10 is lower than the preset voltage, the Zener diode is cut off and no voltage is output.

[0053] In one embodiment, the impedance circuit 120 includes a second resistor R2 , a third resistor R3 , a fourth resistor R4 , and a second switch element Q1 .

[0054] The second resistor R2 is connected between the current setting end of the constant current module 200 and the negative electrode of the battery module 10; the third resistor R3 is connected in series with the second switch element Q1 and then connected in parallel with the second resistor R2; the fourth resistor R4 is connected between the series node and the control end of the second switch element Q1.

[0055] Exemplarily, the second switch element Q1 includes an N-channel MOS tube, and the fourth resistor R4 is a protective resistor of the MOS tube, which is mainly used for current limiting. The MOS tube is turned on under the drive of the first voltage. At this time, the impedance circuit 120 impedance connects the third resistor R3 and the second resistor R2 in parallel to the current setting end of the constant current module 200, and the impedance is low. The constant current module 200 controls the power supply current flowing through the light-emitting module 20 to be the first current value, and the light-emitting module 20 is in a high-brightness state, for example, designed during the time of concentrated activities of the crowd. The MOS tube is cut off under the drive of the second voltage. At this time, the impedance circuit 120 impedance only connects the second resistor R2 to the current setting end of the constant current module 200, and the impedance is high. The constant current module 200 controls the power supply current flowing through the light-emitting module 20 to be the second current value, and the light-emitting module 20 is in a low-amount state, for example, designed during non-concentrated activity time.

[0056] In one embodiment, the light emitting module 20 includes an LED, and the constant current module 200 includes a linear constant current chip U1, and the linear constant current chip U1 includes:

[0057] The input pin VIN constitutes the input end of the constant current module 200 and is connected to the positive electrode of the battery module 10;

[0058] LED pin LED, constituting the output end of the constant current module 200, connected to the cathode of the LED, and the anode of the LED connected to the anode of the battery module 10; and

[0059] The current setting pin CS constitutes the current setting terminal of the constant current module 200 and is connected to the impedance circuit 120. By changing the impedance of the impedance circuit 120, the current set by the linear constant current chip U1 to the LED is changed.

[0060] In one embodiment, the linear constant current chip U1 further includes:

[0061] A positive power supply pin VDD connected to the positive electrode of the battery module 10;

[0062] The negative power pin VSS is connected to the negative electrode of the battery module 10 .

[0063] In one embodiment, the light-emitting driving circuit further includes a diode D2, the anode of the diode D2 is connected to the input pin VIN of the linear constant current chip U1 and the charging positive electrode SP+, and the cathode of the diode D2 is connected to the positive electrode of the battery module 10. When the battery is fully charged and the input pin VIN of the linear constant current chip U1 is at a low level, the linear constant current chip U1 drives the LED to light up, and the diode D2 is used to prevent backflow.

[0064] A second aspect of an embodiment of the present application provides a lighting device, including a battery module 10, an LED module (ie, a light emitting module 20) and a light emitting driving circuit as described above, wherein the light emitting driving circuit is connected to the LED module to drive the LED module to operate.

[0065] The lighting device of the embodiment of the present application applies adjustment signals of different amplitudes to the current setting end of the constant current module 200 according to the different voltages of the battery module 10 through the dimming module 100. The constant current module 200 adjusts the power supply current flowing through the light-emitting module 20 according to the adjustment signals of different amplitudes, thereby adjusting the brightness of the light-emitting module 20, thereby controlling the rate at which the battery module 10 releases electrical energy, achieving energy-saving effects, and improving the problem of insufficient power in solar lighting lamps.

[0066] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0067] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0068] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A light-emitting driving circuit, characterized in that: Including dimming module and constant current module; The input end of the dimming module is connected to the battery module, and the output end of the dimming module is connected to the current setting end of the constant current module. The dimming module is used to apply adjustment signals of different amplitudes to the current setting end of the constant current module when the battery voltage is at different voltage values; The input end of the constant current module is connected to the battery module, and the output end of the constant current module is connected to the light-emitting module. The constant current module is used to access the battery voltage provided by the battery module and adjust the power supply current flowing through the light-emitting module according to the adjustment signal. The magnitude of the power supply current corresponds to the amplitude of the adjustment signal.

2. The light-emitting driving circuit according to claim 1, characterized in that: The dimming module comprises: a switch circuit, connected to the battery module, and configured to detect the battery voltage, output a first voltage when the battery voltage is greater than or equal to a preset voltage, and output a second voltage when the battery voltage is less than the preset voltage; An impedance circuit is connected to the switch circuit and the current setting end of the constant current module, and is used to be in a first impedance when connected to the first voltage to apply a first adjustment signal to the current setting end of the constant current module, and to be in a second impedance when connected to the second voltage to apply a second adjustment signal to the current setting end of the constant current module.

3. The light-emitting driving circuit according to claim 2, characterized in that: The switch circuit comprises: a first switch element, connected to the battery module, configured to be turned on and output a turn-on voltage when the battery voltage is greater than or equal to the preset voltage, and to be turned off when the battery voltage is less than the preset voltage; The first resistor is connected in series with the first switch element, and is used to divide the on-voltage and output the first voltage at the series node, and output the second voltage of 0 voltage when the first switch element is turned off.

4. The light-emitting driving circuit according to claim 3, characterized in that: The first switching element includes a Zener diode, a cathode of the Zener diode is connected to the positive electrode of the battery module, an anode of the Zener diode is connected to one end of the first resistor, the other end of the first resistor is connected to the negative electrode of the battery module, and one end of the first resistor constitutes the series node.

5. The light-emitting driving circuit according to claim 3, characterized in that: The impedance circuit comprises: a second resistor connected between the current setting end of the constant current module and the negative electrode of the battery module; A third resistor and a second switch element are connected in series and then in parallel with the second resistor; A fourth resistor is connected between the series node and the control terminal of the second switch element.

6. The light-emitting driving circuit according to claim 5, characterized in that: The second switch element includes a MOS tube.

7. The light-emitting driving circuit according to claim 2, characterized in that: The light emitting module includes an LED, the constant current module includes a linear constant current chip, and the linear constant current chip includes: An input pin, constituting an input end of the constant current module, connected to the positive electrode of the battery module; The LED pin constitutes the output end of the constant current module and is connected to the cathode of the LED, and the anode of the LED is connected to the anode of the battery module; The current setting pin constitutes the current setting end of the constant current module and is connected to the impedance circuit.

8. The light-emitting driving circuit according to claim 7, characterized in that: The linear constant current chip also includes: A positive power supply pin connected to the positive electrode of the battery module; Negative power supply pin, connected to the negative pole of the battery module.

9. The light-emitting driving circuit according to claim 8, characterized in that: A diode is also included, wherein the anode of the diode is connected to the input pin, and the cathode of the diode is connected to the positive electrode of the battery module.

10. A lighting device, characterized in that: It comprises a battery module, an LED module and a light-emitting driving circuit as described in any one of claims 1 to 9, wherein the light-emitting driving circuit is connected to the LED module to drive the LED module to operate.

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