LED driving circuit, LED lamp and LED driving system

Abstract

The present invention provides an LED driving circuit, an LED lamp and an LED driving system. When a data processing circuit is in a fault state, a detection circuit outputs a first control signal to a switch circuit, so that the switch circuit transfers a first driving data frame to a next-level LED driving circuit, thereby ensuring that the next-level driving circuit has an input of a driving data frame. This avoids the situation in which the LED driving circuits behind the faulty LED driving circuit are unable to extract driving data frames to control the operation of LED lamps due to the failure of the LED driving circuit at this level and the inability to transmit the driving data frame further backwards, thereby improving the reliability of the LED driving circuit.

Description

Technical Field

[0001] The present application belongs to the field of LED driving technology, and in particular relates to an LED driving circuit, an LED lamp and an LED driving system. Background Art

[0002] At present, in the traditional multi-stage series LED (Light Emitting Diode) driving system, the LED driving data adopts a single-line transmission method. Each stage of the LED driving circuit intercepts the data required by itself and then transmits the data to the next stage of the LED driving circuit. Therefore, when a failure occurs in one stage of the LED driving circuit, all subsequent LED driving circuits will not work because they cannot receive the driving data.

[0003] Therefore, the traditional technical solution has the problem of poor LED driving reliability. Summary of the invention

[0004] The purpose of the present application is to provide an LED driving circuit, aiming to solve the problem of poor reliability of traditional LED driving.

[0005] A first aspect of an embodiment of the present application provides an LED driving circuit, comprising:

[0006] a data processing circuit configured to extract first display data from the first drive data frame when a first drive data frame is input, reshape and regenerate data of the first drive data frame after the first display data to generate a second drive data frame, and output the second drive data frame to a next-stage LED drive circuit;

[0007] a constant current driving circuit, connected to the data processing circuit, and configured to output a current analog signal to the LED lamp according to the first display data input to make the LED lamp work;

[0008] a detection circuit, the detection circuit being connected to the data processing circuit and configured to detect a failure of the data processing circuit to output a first control signal; and

[0009] A switch circuit is connected to the detection circuit and is configured to control the first drive data frame to be transferred to the next-level LED drive circuit based on the first control signal.

[0010] In one embodiment, the detection circuit is specifically configured to output the first control signal when it is detected that the data processing circuit stops outputting the second drive data frame and / or the power supply voltage of the data processing circuit is not within a preset voltage range.

[0011] In one embodiment, the switching circuit includes a field effect transistor and a first resistor; the source of the field effect transistor is the first drive data frame input terminal of the switching circuit, the drain of the field effect transistor is connected to the first end of the first resistor, the second end of the first resistor is the first drive data frame output terminal of the switching circuit, and the gate of the field effect transistor is the first control signal input terminal of the switching circuit.

[0012] In one embodiment, the detection circuit includes a second resistor; the first end of the second resistor is connected to the power ground, the second end of the second resistor is the first control signal output end of the detection circuit, and is the power supply voltage analog input end of the detection circuit and / or the second drive data frame input end of the detection circuit.

[0013] In one embodiment, the data processing circuit includes:

[0014] a first latch component, configured to extract the first display data when the first drive data frame is input, generate a third drive data frame according to the extracted first drive data frame, and output the first display data to the constant current drive circuit;

[0015] a first serial shift component connected to the first latch component and configured to remove the first display data from the third driving data frame to generate a fourth driving data frame; and

[0016] The first data regeneration component is connected to the first serial shift component and is configured to reshape and regenerate the fourth drive data frame to output the second drive data frame to the next stage LED drive circuit.

[0017] In one embodiment, the data processing circuit includes:

[0018] an analysis and judgment component, configured to output a target number of rejection signals according to the degree of damage to the analog signal of the first drive data frame when the first drive data frame is input;

[0019] a second latch component, connected to the analysis and judgment component, configured to extract the first display data after removing the target number of target display data from the first drive data frame, generate a fifth drive data frame according to the extracted first drive data frame, and output the first display data to the constant current drive circuit;

[0020] a second serial shift component connected to the second latch component and configured to remove the first display data from the fifth drive data frame to generate a sixth drive data frame; and

[0021] The second data regeneration component is connected to the second serial shift component and is configured to reshape and regenerate the sixth drive data frame to output the second drive data frame to the next stage LED drive circuit.

[0022] In one embodiment, the analysis and judgment component includes multiple comparators; the multiple comparators are all connected to the latch component; the multiple comparators are all configured to output a rejection signal when the signal voltage of the input first drive data frame is less than or equal to a reference voltage; wherein the values ​​of the reference voltage analog quantities of the multiple comparators form an arithmetic progression.

[0023] In one embodiment, the LED driving circuit also includes an anti-backflow circuit; the anti-backflow circuit is connected to the data processing circuit and the switching circuit respectively; the anti-backflow circuit is configured to block the first driving data frame from flowing from the switching circuit to the data processing circuit.

[0024] A second aspect of an embodiment of the present application provides an LED lamp, comprising an LED lamp and an LED driving circuit as described above; a first driving data frame input end of the data processing circuit and a first driving data frame input end of the switching circuit are connected to a first wiring terminal, a second driving data frame output end of the data processing circuit and a first driving data frame output end of the switching circuit are connected to a second wiring terminal, and the LED lamp is connected to the constant current driving circuit; the LED lamp is configured to operate according to the current analog signal.

[0025] A third aspect of an embodiment of the present application provides an LED driving system, comprising a power supply device and a plurality of LED lamps as described above; the first wiring terminal of the LED lamp at this level is connected to the second wiring terminal of the LED lamp at the previous level, the second wiring terminal of the LED lamp at this level is connected to the first wiring terminal of the LED lamp at the next level, and the power supply device is respectively connected to the plurality of LED lamps; the power supply device is configured to output the supply voltage to the LED lamp to enable the LED driving circuit to work.

[0026] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned LED driving circuit outputs a first control signal to the switch circuit through the detection circuit when the data processing circuit is in a fault state, so that the switch circuit transfers the first driving data frame to the next-level LED driving circuit, ensuring that the next-level driving circuit has the input of the driving data frame, avoiding the LED driving circuits behind the faulty LED driving circuit from being unable to extract the driving data frame to control the operation of the LED lamp due to the failure of the LED driving circuit at this level. This improves the reliability of the LED driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a first exemplary structure of an LED driving circuit provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a second exemplary structure of an LED driving circuit provided in an embodiment of the present application;

[0029] Figure 3 for Figure 2 A first exemplary circuit schematic diagram of an LED driving circuit is shown;

[0030] Figure 4 for Figure 2 A second exemplary circuit schematic diagram of an LED driving circuit is shown;

[0031] Figure 5 A third exemplary structural diagram of an LED driving circuit provided in an embodiment of the present application;

[0032] Figure 6 A fourth exemplary structural diagram of an LED driving circuit provided in an embodiment of the present application;

[0033] Figure 7 An example circuit diagram of the analysis and judgment component provided in the embodiment of the present application;

[0034] Figure 8 A schematic diagram of a first application effect of the LED driving circuit provided in an embodiment of the present application;

[0035] Fig. 9 A schematic diagram of a second application effect of the LED driving circuit provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of a third application effect of the LED driving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figure 1 An embodiment of the present application provides an LED driving circuit, including a data processing circuit 130 , a constant current driving circuit 140 , a detection circuit 120 and a switch circuit 110 .

[0039] The data processing circuit 130 is configured to extract the first display data in the first driving data frame when the first driving data frame is input, reshape and regenerate the data of the first driving data frame after the first display data to generate a second driving data frame, and output the second driving data frame to the next-stage LED driving circuit 300;

[0040] The constant current driving circuit 140 is connected to the data processing circuit 130 and is configured to output a current analog signal to the LED lamp 400 according to the input first display data so as to make the LED lamp 400 work;

[0041] A detection circuit 120 , the detection circuit 120 is connected to the data processing circuit 130 and is configured to detect a fault in the data processing circuit 130 to output a first control signal; and

[0042] The switch circuit 110 is connected to the detection circuit 120 and is configured to control the first drive data frame to be transferred to the next-level LED drive circuit 300 based on the first control signal.

[0043] In this embodiment, when the data processing circuit 130 is in a normal working state, the data processing circuit 130 extracts the first display data from the first drive data frame output from the previous LED driving circuit 200 or the data frame providing source (such as the control circuit), and transmits the first display data to the constant current driving circuit 140, so that the constant current driving circuit 140 outputs a current analog signal according to the input first display data to control the corresponding LED lamp 400 to work, and the data processing circuit 130 also reshapes and regenerates the data after the first display data in the first drive data frame to generate a second drive data frame, and outputs the second drive data frame to the next LED driving circuit 300 so that the next LED driving circuit 300 can receive the drive data frame used to drive the LED lamp 400 to work; when the data processing circuit 1 30 is in a fault state, and the data processing circuit 130 cannot normally output the second driving data frame. At this time, the detection circuit 120 outputs the first control signal to the switch circuit 110. When the switch circuit 110 inputs the first control signal, the first driving data frame is transferred to the next-level LED driving circuit 300, ensuring that the next-level LED driving circuit 300 has the input of the driving data frame, thereby avoiding the failure of the LED driving circuit of this level to continue to transmit the driving data frame backward, resulting in the LED driving circuits behind the faulty LED driving circuit being unable to extract the driving data frame to control the LED lamp 400 to work. The application effect of the LED driving system formed by connecting multiple LED driving circuits in series by the present application can be seen in Figure 8 When one of the LED driving circuits fails, it will not affect the subsequent LED driving circuits in extracting driving data frames to control the display of the LED lamp 400, thereby improving the reliability of the LED driving circuit.

[0044] The first drive data frame is transferred to the next-stage LED drive circuit 300 through the first switch circuit 110 , which reduces the data damage of the first drive data frame and reduces the data error rate of the first drive data frame.

[0045] Among them, the first display data may include voltage control information, current control information and / or temperature control information. The detection circuit 120 can detect whether the data processing circuit 130 is faulty by directly or indirectly detecting whether the data processing circuit 130 outputs a second drive data frame. The indirect detection method includes but is not limited to detecting whether the power supply voltage of the data processing circuit 130 is normal and detecting whether the internal electrical connection of the data processing circuit 130 is broken. The direct detection method includes but is not limited to detecting whether the second drive data frame is output normally by the data processing circuit 130. It should be understood that the detection circuit 120 can detect one type of fault, multiple types of faults or all types of faults in the data processing circuit 130, which is not limited to this in the present embodiment.

[0046] In one embodiment, the detection circuit 120 is specifically configured to output the first control signal when it is detected that the data processing circuit 130 stops outputting the second driving data frame and / or the power supply voltage of the data processing circuit 130 is not within a preset voltage range.

[0047] In this embodiment, the detection circuit 120 can only detect whether the power supply voltage of the data processing circuit 130 is within a preset voltage range, because most of the faults of the data processing circuit 130 are caused by the fault of the power supply device 150 resulting in problems with the power supply voltage. Therefore, by detecting the input power supply voltage of the data processing circuit 130, most of the data processing circuit 130 faults can be identified, and by being able to determine that the fault type of the data processing circuit 130 is a power supply voltage fault type, the fault can be eliminated directly by replacing the power supply device 150. The detection circuit 120 may also only detect whether the data processing circuit 130 outputs the second drive data frame. When the data processing circuit 130 stops outputting the second drive data frame, it is determined that the data processing circuit 130 is faulty, and the first control signal is output to control the switch circuit 110, so that the switch circuit 110 controls the first drive data frame to be transferred to the next-level LED drive circuit 300. Because when the data processing circuit 130 stops outputting the second drive data frame, the next-level LED drive circuit 300 has no drive data frame input. Therefore, the detection circuit 120 determines whether the data processing circuit 130 is faulty by detecting whether the data processing circuit 130 outputs the second drive data frame. Therefore, the detection circuit 120 can identify all types of faults of the data processing circuit 130, further improving the L The reliability of the ED driving circuit; the detection circuit 120 can also simultaneously detect whether the power supply voltage of the data processing circuit 130 is in a preset voltage range and whether the data processing circuit 130 has a second driving data frame output. When the power supply voltage of the data processing circuit 130 is not in the preset voltage range or the data processing circuit 130 stops outputting the second driving data frame, it is determined that the data processing circuit 130 is faulty. The two detection methods of detecting the power supply circuit and the output of the second driving data are redundant with each other, thereby improving the detection stability of the detection circuit 120. In addition, according to actual needs, the detection circuit 120 can also detect that the power supply voltage of the data processing circuit 130 is not in the preset voltage range and the data processing circuit 130 stops outputting the second driving data frame before determining that the data processing circuit 130 is faulty.

[0048] See also Figure 3 In one embodiment, the switch circuit 110 includes a field effect transistor Q1 and a first resistor R1; the source of the field effect transistor Q1 is the first drive data frame input terminal of the switch circuit 110, the drain of the field effect transistor Q1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is the first drive data frame output terminal of the switch circuit 110, and the gate of the field effect transistor Q1 is the first control signal input terminal of the switch circuit 110.

[0049] See also Figure 3 and Figure 4In one embodiment, the detection circuit 120 includes a second resistor R2; a first end of the second resistor R2 is connected to the power ground, and a second end of the second resistor R2 is a first control signal output end of the detection circuit 120, and is a power supply voltage analog input end of the detection circuit 120 or a second drive data frame input end of the detection circuit 120.

[0050] The following is combined with the working principle Figure 3 The detection circuit 120 and the switch circuit 110 are illustrated. When the power supply voltage output by the power supply device 150 to the data processing circuit 130 is within the preset interval, the power supply voltage analog quantity is high level, and the high level is output to the gate of the field effect transistor Q1, so that the field effect transistor Q1 is in a cut-off state, and the first drive data frame cannot be transmitted to the next-level LED drive circuit 300 through the field effect transistor Q1; when the power supply voltage is not within the preset interval (that is, the data processing circuit 130 fails), the low-level power supply voltage analog quantity is input to the field effect transistor Q1, and the gate of the field effect transistor Q1 is grounded through the second resistor R2 and is at a low level, the field effect transistor Q1 is turned on, and the first drive data frame is output to the next-level LED drive circuit 300 through the field effect transistor Q1 and the first resistor R1. The switch circuit 110 formed by the field effect transistor Q1 and the first resistor R1 reduces the data damage to the first drive data frame and reduces the data bit error rate of the first drive data frame.

[0051] The following is combined with the working principle Figure 4 The detection circuit 120 and the switch circuit 110 shown in the figure are illustrated. When the data processing circuit 130 outputs the second drive data frame, the signal voltage of the second drive data frame outputs a high level to the gate of the field effect tube Q1, so that the field effect tube Q1 is in a cut-off state, and the first drive data frame cannot be transmitted to the next-level LED drive circuit 300 through the field effect tube Q1; when the data processing circuit 130 stops outputting the second drive data frame, the gate of the field effect tube Q1 is grounded through the second resistor R2 and is at a low level, the field effect tube Q1 is turned on, and the first drive data frame is output to the next-level LED drive circuit 300 through the field effect tube Q1 and the first resistor R1. The switch circuit 110 formed by the field effect tube Q1 and the first resistor R1 reduces data damage to the first drive data frame and improves data fidelity of the first drive data frame.

[0052] See also Figure 5 In one embodiment, the data processing circuit 130 includes a first latch component 131, a first serial shift component 132 and a first data regeneration component 133.

[0053] The first latch component 131 is configured to extract the first display data when the first driving data frame is input, reshape and regenerate the data of the first driving data frame after the first display data to generate a third driving data frame, and output the first display data to the constant current driving circuit 140;

[0054] A first serial shift component 132 connected to the first latch component 131 and configured to remove the first display data in the third driving data frame to generate a fourth driving data frame; and

[0055] The first data regeneration component 133 is connected to the first serial shift component 132 and is configured to reshape and regenerate the fourth driving data frame to output a second driving data frame to the next stage LED driving circuit 300 .

[0056] In this embodiment, the first latch component 131 extracts the first display data from the first drive data frame, and outputs the first display data to the constant current drive circuit 140, and reshapes and regenerates the data of the first drive data frame after the first display data to generate a third drive data frame. The constant current drive circuit 140 controls the LED lamp 400 to work according to the first display data. The first serial shift component 132 removes the first display data located at the first position of the third drive data frame to generate a fourth drive data frame. The first data regeneration component 133 reshapes the fourth drive data frame to regenerate a second drive data frame that meets the preset parameter standard and outputs it to the next-level LED drive circuit. When each display data in the first drive data frame does not contain an ID, since it is impossible to predict the specific fault location and number of faults of the LED drive circuit, the second latch component 135 can only be set to extract the first display data at the first position of the first drive data frame. Then, when there is a faulty LED drive circuit in front of the current normal LED drive circuit, the display effect of the LED drive system composed of multiple LED drive circuits is as follows: Fig. 9 As shown, the first display data extracted by the subsequent LED driving circuits of the faulty LED driving circuit will be shifted from the preset ones, which may eventually cause a large deviation in the overall display composed of multiple LED lamps 400; when each display data has a preset corresponding ID (Identity, identity identification number), the first latch component 131 can extract the first display data of the corresponding ID according to the preset order of the current LED driving circuit, so that no matter whether there is an LED driving circuit failure before the current LED driving circuit, the first latch component 131 can extract the preset corresponding first display data. The display effect of the LED driving system composed of multiple LED driving circuits in this way is as follows: Fig.10As shown, each LED driving circuit can control the LED lamp 400 to display according to the corresponding first display data, and the first display data will not be shifted due to a failure of the LED driving circuit, thereby causing a major change in the overall display effect of multiple LED lamps 400.

[0057] In the first aspect, in one embodiment, the data processing circuit 130 includes a second latch component 135 , a second latch component 135 , a second serial shift component 136 and a second data regeneration component 137 .

[0058] The analysis and judgment component 134 is configured to output a target number of rejection signals according to the degree of damage to the analog signal of the first drive data frame when the first drive data frame is input;

[0059] The second latch component 135 is connected to the analysis and judgment component 134, and is configured to extract the first display data after removing the target number of target display data from the first drive data frame, generate a fifth drive data frame according to the extracted first drive data frame, and output the first display data to the constant current drive circuit 140;

[0060] A second serial shift component 136 connected to the second latch component 135 and configured to remove the first display data in the fifth driving data frame to generate a sixth driving data frame; and

[0061] The second data regeneration component 137 is connected to the second serial shift component 136 and is configured to reshape and regenerate the sixth driving data frame to output a second driving data frame to the next stage LED driving circuit 300 .

[0062] In order to solve the problem that when each display data in the first drive data frame does not contain an ID, the first display data extracted by the subsequent LED drive circuit of the faulty LED drive circuit will be shifted from the preset total, the solution of this embodiment is provided. In this embodiment, if there is a faulty LED drive circuit between the current normal LED drive circuit and the previous normal LED drive circuit, because the first drive data frame of the current LED drive circuit is directly transferred and input through the switch circuit 110 of the faulty LED drive circuit without being reshaped and regenerated by the data transmission circuit, the signal analog quantity of the first drive data frame will decrease under the action of the switch circuit 110. If there is a fault in an LED drive circuit, the signal analog quantity of the first drive data frame will decrease. The analog value of the signal of the first driving data frame decreases by two times of the first data value if two consecutive LED driving circuits fail. The analyzing and judging component 134 determines the number of damaged LED driving circuits by judging the degree of damage of the analog value of the signal of the first driving data frame, and then outputs a corresponding target number of rejection signals to the second latch component 135. The second latch component 135 rejects the target number of target display data located in the front of the first driving data frame according to the rejection signal, and then the second latch component 135 extracts the first display data located in the first position, and then generates a fifth driving data frame according to the extracted first driving data frame. The constant current driving circuit 140 controls the LED lamp 400 to work according to the first display data. The second serial shift component 136 rejects the first display data in the fifth driving data frame to generate a sixth driving data frame. The second data regeneration component 137 reshapes and regenerates the sixth driving data frame to output a second driving data frame to the next-level LED driving circuit 300. This embodiment can identify the number of faulty LED driving circuits between a current normal LED driving circuit and a previous normal LED driving circuit through the analysis and judgment component 134, so that the current LED driving circuit only needs to extract the first display data of the first position of the first driving data frame after eliminating the target display data of the target number to achieve the extraction of the first display data corresponding to the current LED driving circuit, thereby avoiding the shifting of the first display data due to the failure of the previous LED driving circuit, thereby causing a large change in the overall display effect of the multiple LED lamps 400.

[0063] See also Figure 7 In one embodiment, the analysis and judgment component 134 includes multiple comparators; the multiple comparators are all connected to the latch component; the multiple comparators are all configured to output a rejection signal when the signal voltage of the input first drive data frame is less than or equal to the reference voltage; wherein the values ​​of the reference voltage analog quantities of the multiple comparators form an arithmetic progression.

[0064] In this embodiment, the multiple comparators include a first comparator CMP1, a second comparator CMP2... and an Nth comparator CMPN. The values ​​of the first reference voltage analog quantity of the first comparator CMP1, the second reference voltage analog quantity of the second comparator CMP2... and the Nth reference voltage analog quantity of the Nth comparator CMPN form an arithmetic progression. The first comparator CMP1, the second comparator CMP2... and the Nth comparator CMPN all output a rejection signal when the signal voltage of the input first drive data frame is less than or equal to its corresponding reference voltage. Because the unit voltage drop of the signal voltage of the first drive data frame for each faulty LED drive circuit is the same, the first comparator CMP1, the second comparator CMP2... and the Nth comparator CMPN can identify the number of LED drive circuits with continuous faults by converting the actual voltage drop of the signal voltage of the first drive data frame and the unit voltage drop into the number of output extraction signals.

[0065] Among them, the more comparators are set, the more it is possible to avoid the impact of continuously faulty LED driving circuits on subsequent LED displays. The number of comparators is at least one, and the number of comparators is at most the number of LED driving circuits in the LED driving system. The number of comparators is set by technical personnel in this field according to the actual required accuracy.

[0066] See also Figure 2-Figure 6 In one embodiment, the LED driving circuit further includes an anti-backflow circuit 160; the anti-backflow circuit 160 is connected to the data processing circuit 130 and the switch circuit 110 respectively; the anti-backflow circuit 160 is configured to block the first driving data frame from flowing from the switch circuit 110 to the data processing circuit 130. In one embodiment, the anti-backflow circuit 160 includes a diode D1, the anode of the diode D1 is connected to the second driving data frame output end of the data processing circuit 130, and the cathode of the diode D1 is connected to the first driving data frame output end of the switch circuit 110. The anti-backflow circuit 160 can prevent the first driving data frame output by the switch circuit 110 from flowing into the data processing circuit 130 and affecting the data processing circuit 130.

[0067] The second aspect of the embodiment of the present application provides an LED lamp, comprising an LED lamp 400 and an LED driving circuit as in any of the above embodiments; the first driving data frame input end of the data processing circuit 130 and the first driving data frame input end of the switch circuit 110 are connected to the first wiring terminal, the second driving data frame output end of the data processing circuit 130 and the first driving data frame output end of the switch circuit 110 are connected to the second wiring terminal, and the LED lamp 400 is connected to the constant current driving circuit 140; the LED lamp 400 is configured to work according to the current analog signal. Because the LED lamp in this embodiment includes the LED driving circuit of any of the above embodiments, the LED lamp in this embodiment at least has the beneficial effects corresponding to the LED driving circuit of any of the above embodiments.

[0068] The third aspect of the embodiment of the present application provides an LED driving system, including a power supply device 150 and a plurality of LED lamps as in any of the above embodiments; the first terminal of the LED lamp of this level is connected to the second terminal of the LED lamp of the previous level, the second terminal of the LED lamp of this level is connected to the first terminal of the LED lamp of the next level, and the power supply device 150 is connected to the plurality of LED lamps respectively; the power supply device 150 is configured to output a supply voltage to the LED lamp to make the LED driving circuit work. Because the LED driving system in this embodiment includes the LED lamp of any of the above embodiments, the LED driving system in this embodiment at least has the beneficial effects corresponding to the LED lamp of any of the above embodiments.

[0069] 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. An LED driving circuit, characterized in that: include: The data processing circuit is configured to extract the first display data in the first drive data frame when a first drive data frame is input, reshape and regenerate the data of the first drive data frame after the first display data to generate a second drive data frame, and output the second drive data frame to the next-stage LED drive circuit; a constant current driving circuit, connected to the data processing circuit, and configured to output a current analog signal to the LED lamp according to the first display data input so that the LED lamp works; a detection circuit, the detection circuit being connected to the data processing circuit and configured to detect a fault of the data processing circuit to output a first control signal; as well as a switch circuit, the switch circuit being connected to the detection circuit and configured to control the first drive data frame to be transferred to a next-level LED drive circuit based on the first control signal; The detection circuit is specifically configured to output the first control signal when it is detected that the data processing circuit stops outputting the second drive data frame and / or the power supply voltage of the data processing circuit is not within a preset voltage range; The data processing circuit comprises: an analysis and judgment component, configured to output a target number of rejection signals according to the degree of damage to the analog quantity of the signal of the first drive data frame when the first drive data frame is input; a second latch component, connected to the analysis and judgment component, configured to extract the first display data after removing the target number of target display data from the first drive data frame, generate a fifth drive data frame according to the extracted first drive data frame, and output the first display data to the constant current drive circuit; a second serial shift component connected to the second latch component and configured to remove the first display data from the fifth drive data frame to generate a sixth drive data frame; and A second data regeneration component is connected to the second serial shift component and is configured to reshape and regenerate the sixth drive data frame to output the second drive data frame to the next stage LED drive circuit; The analysis and judgment component includes multiple comparators; the multiple comparators are all connected to the latch component; the multiple comparators are all configured to output a rejection signal when the signal voltage of the input first drive data frame is less than or equal to the reference voltage; wherein the values ​​of the reference voltage analog quantities of the multiple comparators form an arithmetic progression.

2. The LED driving circuit according to claim 1, characterized in that: The switching circuit includes a field effect tube and a first resistor; the source of the field effect tube is the first driving data frame input end of the switching circuit, the drain of the field effect tube is connected to the first end of the first resistor, the second end of the first resistor is the first driving data frame output end of the switching circuit, and the gate of the field effect tube is the first control signal input end of the switching circuit.

3. The LED driving circuit according to claim 1, characterized in that: The detection circuit includes a second resistor; the first end of the second resistor is connected to the power ground, the second end of the second resistor is the first control signal output end of the detection circuit, and is the power supply voltage analog input end of the detection circuit and / or the second drive data frame input end of the detection circuit.

4. The LED driving circuit according to claim 1, characterized in that: The data processing circuit comprises: A first latch component is configured to extract the first display data when the first drive data frame is input, reshape and regenerate the data of the first drive data frame after the first display data to generate a third drive data frame, and output the first display data to the constant current drive circuit; a first serial shift component connected to the first latch component and configured to remove the first display data from the third driving data frame to generate a fourth driving data frame; and The first data regeneration component is connected to the first serial shift component and is configured to reshape and regenerate the fourth drive data frame to output the second drive data frame to the next stage LED drive circuit.

5. The LED driving circuit according to claim 1, characterized in that: The LED driving circuit also includes an anti-backflow circuit; the anti-backflow circuit is connected to the data processing circuit and the switch circuit respectively; the anti-backflow circuit is configured to block the first driving data frame from flowing from the switch circuit to the data processing circuit.

6. An LED lamp, characterized in that: It comprises an LED lamp and an LED driving circuit as described in any one of claims 1 to 5; the first driving data frame input end of the data processing circuit and the first driving data frame input end of the switch circuit are connected to a first wiring terminal, the second driving data frame output end of the data processing circuit and the first driving data frame output end of the switch circuit are connected to a second wiring terminal, the LED lamp is connected to the constant current driving circuit; the LED lamp is configured to operate according to the current analog signal.

7. An LED driving system, characterized in that: It comprises a power supply device and a plurality of LED lamps as claimed in claim 6; the first terminal of the LED lamp at this level is connected to the second terminal of the LED lamp at the previous level, the second terminal of the LED lamp at this level is connected to the first terminal of the LED lamp at the next level, and the power supply device is respectively connected to the plurality of LED lamps; the power supply device is configured to output the supply voltage to the LED lamp to enable the LED driving circuit to work.

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