Linear stroboflash-free circuit

Abstract

The utility model provides a linear stroboscopic-free circuit. The linear stroboscopic-free circuit comprises a live wire input end, a null line input end, a rectifying circuit, n filter circuits, n stroboscopic-free circuits, n light-emitting sections, n diodes and m constant-current driving circuits. The live wire input end and the null line input end are used for being connected with external alternating current and transmitting the alternating current to the rectifying circuit, the rectifying circuit is used for rectifying the alternating current to obtain direct current, and the n filter circuits are used for filtering the direct current to obtain filtered direct current. The m constant-current driving circuits are used for carrying out constant current treatment on direct current passing through the n light-emitting sections; the n light-emitting sections are in one-to-one correspondence with the n stroboflash removing circuits, and the light-emitting sections are connected with the constant-current driving circuit through the stroboflash removing circuits. According to the utility model, the plurality of constant-current chips are connected in parallel for use, so that the loading capacity is increased, and the design of parallel ripple-removing chips is adopted, so that the driving capacity of the stroboflash-removing circuit is increased. The utility model is mainly used in the field of integrated circuits.

Description

Technical Field

[0001] The present technical solution relates to the field of integrated circuits, and in particular to a linear, lightning-free circuit. Background Art

[0002] Linear power supplies are widely used in the lighting industry and offer a high cost-performance ratio. The new national standard has introduced new requirements for products over 25W to comply with the CCC, requiring high P, flicker-free operation, and excessive harmonics. Most current designs on the market utilize switching power supplies, which are costly. Some linear designs, however, often use very small electrolytic capacitors to meet certification requirements, impacting temperature rise and quality, and resulting in poor flicker-free operation. Utility Model Content

[0003] The utility model provides a linear non-flash circuit to solve one or more technical problems existing in the prior art and at least provides a beneficial choice or creates conditions.

[0004] A linear anti-strobe circuit is characterized by comprising: a live wire input terminal, a neutral wire input terminal, a rectifier circuit, n filter circuits, n anti-strobe circuits, n light-emitting segments, n diodes and m constant current drive circuits.

[0005] The live wire input terminal and the neutral wire input terminal are used to connect to external alternating current power and transmit the alternating current power to the rectifier circuit. The rectifier circuit is used to rectify the alternating current power to obtain direct current power. The n filter circuits are used to filter the direct current power. The m constant current drive circuits are used to make the direct current power passing through the n light-emitting segments a constant current. The n light-emitting segments correspond one to one with the n anti-strobe circuits, wherein the light-emitting segments are connected to the constant current drive circuit via the anti-strobe circuit.

[0006] Wherein, n and m are both positive integers, n is greater than or equal to 3, and m is greater than or equal to 2.

[0007] Furthermore, the live wire input terminal is connected to the first input terminal of the rectifier circuit, and the neutral wire input terminal is connected to the second input terminal of the rectifier circuit.

[0008] The first output end of the rectifier circuit is connected to the anode of the first diode, the cathode of the first diode is respectively connected to the positive electrode of the first light-emitting segment and the positive electrode of the first filter circuit, and the negative electrode of the first light-emitting segment is respectively connected to the first drain terminals of the m constant current drive circuits through the first anti-strobe circuit.

[0009] The anode of the n-1th diode is connected to the cathode of the n-2th filter circuit, the cathode of the n-1th diode is connected to the anode of the n-1th light-emitting segment and the anode of the n-1th filter circuit respectively, and the cathode of the n-1th light-emitting segment is connected to the second drain terminal of the mth constant current drive circuit through the n-1th anti-strobe circuit.

[0010] The anode of the nth diode is respectively connected to the negative electrode of the n-1th filter circuit and the second drain terminal of the mth constant current drive circuit, the cathode of the nth diode is respectively connected to the positive electrode of the nth light-emitting segment and the positive electrode of the nth filter circuit, and the negative electrode of the nth light-emitting segment is respectively connected to the third drain terminals of the m constant current drive circuits through the nth de-strobe circuit.

[0011] The first drain terminal of the mth constant current driving circuit is connected to the first drain terminal of the (m-1)th constant current driving circuit.

[0012] The second drain terminal of the mth constant current driving circuit is connected to the second drain terminal of the (m-1)th constant current driving circuit.

[0013] Furthermore, the constant current drive circuit includes: a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor and a constant current chip, wherein the two ends of the mth first resistor are respectively connected to the chip select signal end of the mth constant current drive circuit and the ground end of the m-1th constant current drive circuit; one end of the first first resistor is respectively connected to the second output end of the rectifier circuit, one end of the second capacitor, the ground ends of the 1st to m-1th constant current drive circuits, one end of the m second capacitors, one end of the third capacitor and the ground end; the other end of the third capacitor is respectively connected to one end of the m second resistors, the third drain end of the m constant current drive circuits and the negative electrode of the nth de-strobe circuit; the other ends of the m second resistors are respectively connected to the input end of the m constant current drive circuits and the other end of the m second capacitors; the first drain end of the m constant current drive circuits is connected to the negative electrode of the 1st de-strobe circuit; and the second drain end of the mth constant current drive circuit is connected to the negative electrode of the n-1th de-strobe circuit.

[0014] Furthermore, the filtering circuit includes a third resistor and a fourth capacitor, one end of the third resistor is connected to one end of the fourth capacitor, the cathode of the diode and the positive electrode of the light-emitting segment, and the other end of the third resistor is connected to the other end of the fourth capacitor and the negative electrode of the de-strobe circuit.

[0015] Furthermore, the rectifier circuit includes: a first input terminal, a second input terminal, a first output terminal, a second output terminal and four rectifier diodes, the cathode of the first rectifier diode is connected to the anode of the second rectifier diode, the cathode of the second rectifier diode is connected to the cathode of the third rectifier diode, the anode of the third rectifier diode is connected to the cathode of the fourth rectifier diode, the anode of the fourth rectifier diode is connected to the anode of the first rectifier diode, the first input terminal is connected to the cathode of the first rectifier diode and the anode of the second rectifier diode, the second input terminal is connected to the anode of the third rectifier diode and the cathode of the fourth rectifier diode, the first output terminal is connected to the cathode of the second rectifier diode and the cathode of the third rectifier diode, and the second output terminal is connected to the anode of the first rectifier diode and the anode of the fourth rectifier diode.

[0016] Furthermore, the de-strobe circuit includes: a first de-strobe chip, a second de-strobe chip and a fifth capacitor; the first port of the first de-strobe chip is connected to the first port of the second de-strobe chip, which is recorded as the positive pole of the de-strobe circuit, the second port of the first de-strobe chip is respectively connected to the second port of the second de-strobe chip and one end of the fifth capacitor, the third port of the de-strobe chip is respectively connected to the third port of the second de-strobe chip and the other end of the fifth capacitor, which is recorded as the negative pole of the de-strobe circuit, the negative pole of the first de-strobe circuit is connected to the first drain terminal of the m constant current drive circuits, and the negative pole of the n-1th de-strobe circuit is connected to the second drain terminal of the mth constant current drive circuit.

[0017] Furthermore, a varistor is provided between the neutral line input terminal and the live line input terminal, and a fuse resistor is provided at the live line input terminal.

[0018] Preferably, the model of the constant current chip is MT7615H.

[0019] Preferably, the models of the first and second anti-strobe chips are MT7641T.

[0020] Preferably, the fourth capacitor is an electrolytic capacitor.

[0021] The beneficial effects of the present invention include: a multi-segment linear drive design is implemented. Multiple constant current chips are connected in parallel to increase load capacity. The parallel ripple removal chip design increases the drive capability of the anti-strobe circuit, resolves temperature rise issues, and enhances stability. Compared with existing technologies, the present circuit is simpler, more reliable, and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0023] Figure 1 This is a schematic diagram of the system connection structure of a linear non-flash circuit;

[0024] Figure 2 Schematic diagram of the circuit connection structure of a linear flash-free circuit. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] LED light flicker refers to rapid and repetitive changes in the brightness or intensity of a light source. This phenomenon is visually perceptible and may cause discomfort or even health problems to some people.

[0027] refer to Figure 2 , Figure 2 It is a schematic diagram of the circuit connection principle.

[0028] In this embodiment, n is 3 and m is 4.

[0029] A linear anti-strobe circuit is provided, comprising a live wire input terminal L, a neutral wire input terminal N, a rectifier circuit, n filter circuits, n anti-strobe circuits, n light-emitting segments, n diodes and m constant current drive circuits.

[0030] The live input terminal L and the neutral input terminal N are used to connect to external alternating current (AC) and transmit the AC power to a rectifier circuit. The rectifier circuit is used to rectify the AC power to obtain DC power. The n filter circuits are used to filter the DC power. The m constant current drive circuits are used to maintain a constant current for the DC power passing through the n light-emitting segments F. The n light-emitting segments F correspond one-to-one to the n strobe-eliminating circuits. The light-emitting segments F are connected to the constant current drive circuits via the strobe-eliminating circuits.

[0031] In order to convert alternating current into direct current, in some further specific examples, the rectifier circuit includes: a first input terminal, a second input terminal, a first output terminal, a second output terminal and four rectifier diodes, the cathode of the first rectifier diode D1 is connected to the anode of the second rectifier diode D2, the cathode of the second rectifier diode D2 is connected to the cathode of the third rectifier diode D3, the anode of the third rectifier diode D3 is connected to the cathode of the fourth rectifier diode D4, and the anode of the fourth rectifier diode D4 is connected to the cathode of the first rectifier diode D1. The first input terminal is connected to the anode of the first rectifier diode D1, the second input terminal is connected to the anode of the third rectifier diode D3 and the cathode of the fourth rectifier diode D4, the first output terminal is connected to the cathode of the second rectifier diode D2 and the cathode of the third rectifier diode D3, and the second output terminal is connected to the anode of the first rectifier diode D1 and the anode of the fourth rectifier diode D4. The four rectifier diodes form a bridge rectifier circuit. The operating principle of the bridge rectifier circuit is based on the unidirectional conduction characteristic of the diode, which only allows current to flow from positive to negative. When the diode is conducting, its forward voltage is reduced to a very small value. This allows the AC power to flow through the diode to the load without a significant voltage drop during both the positive and negative half-cycles. However, because the diode conducts unidirectionally, the AC power must pass through another diode to flow to the load during the negative half-cycle. In this case, the diode blocks current. Therefore, by switching between alternate conducting and non-conducting states, the bridge rectifier can effectively convert both half cycles of the AC power supply into DC power.

[0032] To filter the DC power output by the rectifier circuit, in some further specific examples, the filtering circuit includes a third resistor R3 and a fourth capacitor C4. One end of the third resistor R3 is connected to one end of the fourth capacitor C4, the cathode of the diode D5, and the positive electrode of the light-emitting segment F. The other end of the third resistor R3 is connected to the other end of the fourth capacitor C4 and the negative electrode of the anti-strobe circuit. The concept of filtering is an engineering concept based on Fourier analysis and transformation. According to advanced mathematical theory, any signal that meets certain conditions can be viewed as a superposition of an infinite number of sinusoidal waves. In other words, the engineering signal is a linear superposition of sinusoidal waves of different frequencies. The sinusoidal waves of different frequencies that make up the signal are called the signal's frequency components or harmonic components. The function of the filtering circuit is to minimize the AC component of the pulsating DC voltage while retaining its DC component, thereby reducing the output voltage ripple coefficient and making the waveform smoother.

[0033] In order to perform constant current on direct current, in some further specific examples, the constant current drive circuit includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a constant current chip Um, and the two ends of the mth first resistor R1 are respectively connected to the chip select signal end of the mth constant current drive circuit and the ground end of the m-1th constant current drive circuit, and one end of the first first resistor R1 is respectively connected to the second output end of the rectifier circuit, one end of the second capacitor C2, the ground end of the 1st to m-1th constant current drive circuits, and the m second One end of capacitor C2 and one end of a third capacitor C3 are connected to the ground terminal. The other end of the third capacitor C3 is respectively connected to one end of m second resistors R2, the third drain terminals of m constant current drive circuits, and the negative electrode of the nth de-strobe circuit. The other ends of the m second resistors R2 are respectively connected to the input terminals of the m constant current drive circuits and the other ends of the m second capacitors C2. The first drain terminals of the m constant current drive circuits are connected to the negative electrode of the first de-strobe circuit, and the second drain terminal of the mth constant current drive circuit is connected to the negative electrode of the n-1th de-strobe circuit. The main function of the constant current drive circuit is to ensure that the current in the circuit remains constant and is not affected by external factors.

[0034] Ripple is a phenomenon caused by voltage fluctuations in a DC stabilized power supply. Since a DC stabilized power supply is generally formed by an AC power supply through rectification and voltage stabilization, it is inevitable that there will be some AC components in the DC stabilized quantity. This AC component superimposed on the DC stabilized quantity is called ripple. In order to achieve a flicker-free design, in some further specific examples, the ripple removal circuit includes a first destrobe chip Un1, a second destrobe chip Un2 and a fifth capacitor C5; the first port of the first destrobe chip Un1 is connected to the first port of the second destrobe chip Un2, which is recorded as the positive pole of the destrobe circuit, the second port of the first destrobe chip Un1 is respectively connected to the second port of the second destrobe chip Un2 and one end of the fifth capacitor C5, the third port of the first destrobe chip Un1 is respectively connected to the third port of the second destrobe chip Un2 and the other end of the fifth C5 capacitor, which is recorded as the negative pole of the destrobe circuit, the negative pole of the first destrobe circuit is connected to the first drain terminal of the m constant current drive circuits, and the negative pole of the n-1th destrobe circuit is connected to the second drain terminal of the mth constant current drive circuit.

[0035] Inrush current refers to the peak current flowing into a power supply device at the moment the power is turned on. To mitigate surges, in some further embodiments, a varistor is provided between the neutral input terminal L and the live input terminal N, and a fuse resistor is provided at the live input terminal L. These resistors can effectively absorb the sudden surge of energy and protect connected devices from damage.

[0036] The number of constant current drive circuits in the constant current drive circuit of the present application needs to be two or more, preferably four.

[0037] Although the description of the present invention has been quite detailed and particularly describes the embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims by reference to the appended claims, taking into account the prior art, so as to effectively cover the intended scope of the present application. In addition, the above description of the present application is based on the embodiments foreseeable by the inventors, which is intended to provide a useful description, and those non-substantial changes to the present application that have not yet been foreseen may still represent equivalent changes to the present application.

Claims

1. A linear non-flash circuit, characterized in that: include: A live wire input terminal, a neutral wire input terminal, a rectifier circuit, n filter circuits, n anti-strobe circuits, n light-emitting segments, n diodes and m constant current drive circuits; The live wire input terminal and the neutral wire input terminal are used to connect to external alternating current and transmit the alternating current to a rectifier circuit; the rectifier circuit is used to rectify the alternating current to obtain direct current; The n filter circuits are used to filter the direct current; The m constant current driving circuits are used to make the direct current passing through the n light-emitting segments a constant current; The n light-emitting segments correspond one to one with the n anti-strobe circuits, wherein the light-emitting segments are connected to the constant current driving circuit via the anti-strobe circuits; Wherein, n and m are both positive integers, n is greater than or equal to 3, and m is greater than or equal to 2.

2. A linear non-flash circuit according to claim 1, characterized in that: The live wire input terminal is connected to the first input terminal of the rectifier circuit, and the neutral wire input terminal is connected to the second input terminal of the rectifier circuit; The first output terminal of the rectifier circuit is connected to the anode of the first diode, the cathode of the first diode is connected to the anode of the first light-emitting segment and the anode of the first filter circuit respectively, and the cathode of the first light-emitting segment is connected to the first drain terminals of the m constant current drive circuits respectively via the first anti-strobe circuit; The anode of the n-1th diode is connected to the cathode of the n-2th filter circuit, the cathode of the n-1th diode is connected to the anode of the n-1th light-emitting segment and the anode of the n-1th filter circuit respectively, and the cathode of the n-1th light-emitting segment is connected to the second drain terminal of the mth constant current driving circuit through the n-1th anti-strobe circuit; The anode of the nth diode is connected to the cathode of the n-1th filter circuit and the second drain terminal of the mth constant current drive circuit respectively, the cathode of the nth diode is connected to the anode of the nth light-emitting segment and the anode of the nth filter circuit respectively, and the cathode of the nth light-emitting segment is connected to the third drain terminals of the m constant current drive circuits respectively via the nth anti-strobe circuit; The first drain terminal of the mth constant current driving circuit is connected to the first drain terminal of the m-1th constant current driving circuit; The second drain terminal of the mth constant current driving circuit is connected to the second drain terminal of the (m-1)th constant current driving circuit.

3. The linear non-flash circuit according to claim 1, characterized in that: The constant current drive circuit includes: a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor and a constant current chip, wherein the two ends of the mth first resistor are respectively connected to the chip select signal end of the mth constant current drive circuit and the ground end of the m-1th constant current drive circuit, one end of the first first resistor is respectively connected to the second output end of the rectifier circuit, one end of the second capacitor, the ground ends of the 1st to m-1th constant current drive circuits, one end of the m second capacitors, one end of the third capacitor and the ground end, the other end of the third capacitor is respectively connected to one end of the m second resistors, the third drain end of the m constant current drive circuits and the negative electrode of the nth de-strobe circuit, the other ends of the m second resistors are respectively connected to the input end of the m constant current drive circuits and the other end of the m second capacitors, the first drain end of the m constant current drive circuits is connected to the negative electrode of the 1st de-strobe circuit, and the second drain end of the mth constant current drive circuit is connected to the negative electrode of the n-1th de-strobe circuit.

4. The linear non-flash circuit according to claim 1, characterized in that: The filtering circuit includes a third resistor and a fourth capacitor, one end of the third resistor is connected to one end of the fourth capacitor, the cathode of the diode and the positive electrode of the light-emitting segment, and the other end of the third resistor is connected to the other end of the fourth capacitor and the negative electrode of the anti-strobe circuit.

5. The linear non-flash circuit according to claim 1, characterized in that: The rectifier circuit includes: a first input end, a second input end, a first output end, a second output end and four rectifier diodes, the cathode of the first rectifier diode is connected to the anode of the second rectifier diode, the cathode of the second rectifier diode is connected to the cathode of the third rectifier diode, the anode of the third rectifier diode is connected to the cathode of the fourth rectifier diode, and the anode of the fourth rectifier diode is connected to the anode of the first rectifier diode. The first input end is connected to the cathode of the first rectifier diode and the anode of the second rectifier diode, the second input end is connected to the anode of the third rectifier diode and the cathode of the fourth rectifier diode, the first output end is connected to the cathode of the second rectifier diode and the cathode of the third rectifier diode, and the second output end is connected to the anode of the first rectifier diode and the anode of the fourth rectifier diode.

6. The linear non-flash circuit according to claim 1, characterized in that: The de-strobe circuit includes: a first de-strobe chip, a second de-strobe chip and a fifth capacitor; the first port of the first de-strobe chip is connected to the first port of the second de-strobe chip, which is recorded as the positive electrode of the de-strobe circuit, the second port of the first de-strobe chip is respectively connected to the second port of the second de-strobe chip and one end of the fifth capacitor, the third port of the de-strobe chip is respectively connected to the third port of the second de-strobe chip and the other end of the fifth capacitor, which is recorded as the negative electrode of the de-strobe circuit, the negative electrode of the first de-strobe circuit is connected to the first drain terminal of m constant current drive circuits, and the negative electrode of the n-1th de-strobe circuit is connected to the second drain terminal of the mth constant current drive circuit.

7. The linear non-flash circuit according to claim 1, characterized in that: A varistor is provided between the neutral line input end and the live line input end, and a fuse resistor is provided at the live line input end.

8. The linear non-flash circuit according to claim 3, characterized in that: The model of the constant current chip is MT7615H.

9. The linear non-flash circuit according to claim 6, characterized in that: The models of the first and second anti-strobe chips are MT7641T.

10. The linear non-flash circuit according to claim 4, characterized in that: The fourth capacitor is an electrolytic capacitor.

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