LED string light system and LED string light thereof

Abstract

The application provides a LED string light applied to a control lighting system, the control lighting system comprising a central controller for outputting a driving power and a control signal, the LED light comprising a switch module, a lighting module and a signal integration module, the lighting module comprising at least one common anode LED light group and at least one common cathode LED light group, a common anode end of the common anode LED light group or a common cathode end of the common cathode LED light group receiving the driving power; the switch module being used for receiving the control signal and turning on the lighting module circuit according to the control signal, the switch module being electrically connected to the central controller and being connected in series between the common anode LED light group and the common cathode LED light group; and the signal integration module being used for integrating the control signal, the signal integration module being electrically connected between the common cathode end of the common cathode LED light group and the central controller or being electrically connected between the common anode end of the common anode LED light group and the central controller.

Description

Technical Field

[0001] The present invention relates to the field of lighting, and in particular to an LED string lamp system and an LED string lamp thereof. Background Art

[0002] In existing LED lighting systems, miniaturized LEDs have been developed to minimize the overall size of the lighting device. These miniaturized LEDs are generally designed with either common anode or common cathode configurations. Driving these LEDs requires corresponding drive signals. In traditional lighting circuits, common anode and common anode, or common cathode and common cathode, LED groups cannot be directly connected in series. One approach involves adding resistors to divide the voltage. This converts the driving power into heat, resulting in significant energy consumption. For example, if the LED driver power utilization rate is only 1 / 4 under a 12V signal, connecting two LEDs in series reduces this to 1 / 2, resulting in double the light output at the same power. Connecting three LEDs in series increases the light output to twice the power, resulting in energy waste. Because the type of drive signal in the operating environment cannot be determined, common anode and common cathode LEDs cannot be simply connected in series using conventional methods, resulting in significant energy consumption and increased costs during the development and use of product lighting systems. Therefore, it is necessary to develop an LED series lamp system and LED series lamp that allows for controllable series connection of common anode and common cathode LED groups to accommodate applications with varying voltages. Summary of the Invention

[0003] The present invention provides an LED string lamp system and an LED string lamp thereof, which realizes that in the LED lighting system, a common anode LED lamp group and a common cathode LED lamp group are controllable in series through the combination of a central controller, a switch module, a lighting module and a signal integration module to adapt to application scenarios with different voltages.

[0004] The present invention provides an LED string lamp, which is applied to a controlled lighting system. The controlled lighting system includes a central controller for outputting a driving power supply and a control signal. The LED lamp includes a switch module, a lighting module and a signal integration module. The lighting module includes at least one common anode LED lamp group and at least one common cathode LED lamp group. A common anode end of the common anode LED lamp group or a common cathode end of the common cathode LED lamp group receives the driving power supply; the switch module is used to receive a control signal and turn on the lighting module circuit according to the control signal. The switch module is electrically connected to the central controller and is connected in series between the common anode LED lamp group and the common cathode LED lamp group; the signal integration module is used to integrate the control signal. The signal integration module is electrically connected between the common cathode end of the common cathode LED lamp group and the central controller, or electrically connected between the common anode end of the common anode LED lamp group and the central controller.

[0005] Preferably, the common anode LED lamp group and the common cathode LED lamp group both include LED lamp units corresponding one-to-one to the control signals.

[0006] Preferably, the switch module includes switch devices corresponding to the control signals on a one-to-one basis, and the switch devices are connected in series with the LED lamp units on a one-to-one basis.

[0007] Preferably, the switching device includes but is not limited to a transistor, a MOS transistor, a photoelectric coupling device, and a relay.

[0008] Preferably, the control signal is a low-level control signal, and the transistor is specifically a PNP transistor.

[0009] Preferably, the control signal is a high-level control signal, and the switching transistor is specifically an NPN transistor.

[0010] Preferably, the signal integration module includes diodes corresponding one-to-one to the control signals, one end of the diodes being uniformly connected to the common anode end of the common anode LED lamp group or uniformly connected to the common cathode end of the common cathode LED lamp group, and the other ends of the diodes being respectively connected one-to-one to the control signal end.

[0011] Preferably, the control signal is a low-level control signal, and the signal integration module can be specifically a common-anode LED lamp group, which includes LED lamp units corresponding to the control signal one by one.

[0012] Preferably, the control signal is a high-level control signal, and the signal integration module can be specifically a common cathode LED lamp group, which includes LED lamp units corresponding to the control signal one by one.

[0013] The lighting system provided by the present invention electrically connects the control signal end through a switch module and is connected in series between the common anode LED lamp group and the common cathode LED lamp group. It only needs to select a switching device corresponding to the control signal and cooperate with the signal integration module to realize the controllable series connection of the common anode LED lamp group and the common cathode LED lamp group, so that the lighting system has extremely high versatility. Secondly, the series connection of the switch module with the common anode LED lamp group and the common cathode LED lamp group enables it to adapt to different driving power supply voltages, avoid energy overflow during use and achieve energy saving. In addition, the module layout of the lighting system does not require more resistors in series for voltage division compared to the traditional common anode and common anode series or common cathode and common cathode series layout, so that the lighting device using the lighting system is smaller in size, which can save the production and design costs of lighting products.

[0014] The present invention also provides an LED string lamp system, which includes a central controller for outputting driving power and control signals, the LED lamps as described above, and these LED lamps are connected in parallel with each other. The LED string lamp system includes multiple LED string lamps. Compared with traditional LED lamp systems, the LED string lamp system can double the utilization rate under the same power supply, making the lighting system more energy-efficient and saving more layout space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first embodiment of an LED string lamp provided by the present invention;

[0016] Figure 2 This is a second embodiment of an LED string lamp provided by the present invention;

[0017] Figure 3 This is a third embodiment of an LED string lamp provided by the present invention;

[0018] Figure 4 This is a fourth embodiment of an LED string lamp provided by the present invention;

[0019] Figure 5 This is a fifth embodiment of an LED string lamp provided by the present invention;

[0020] Figure 6 This is an embodiment of an LED string lamp system provided by the present invention. DETAILED DESCRIPTION

[0021] The following further illustrates an LED string lamp system and LED string lamp provided by the present invention in conjunction with the accompanying drawings. It should be pointed out that the following only describes the technical solution and design principle of the present invention in detail using an optimized technical solution.

[0022] See Figure 6The present invention provides an LED string lamp system, comprising a central controller U, LED string lamps G1, LED string lamps G2, etc., wherein the central controller U is used to issue control signals including but not limited to PWM, and comprises a driving power supply terminal 1, and control signal terminals 2, 3, and 4. The driving power supply terminal outputs a driving power of +12V, and the control signal terminals 2, 3, and 4 output low-level control signals B-, G-, and R-, respectively. The string lamps G1 and G2 are connected to the system via male connectors CON1-A and CON2-A and female connectors CON1-Y and CON2-Y. The switch module of the LED string lamps is electrically connected to the control signal terminals and connected in series between the common anode LED lamp group and the common cathode LED lamp group. The signal integration module integrates multiple control signals into one control signal. The switch module controls the operation of the lighting module according to the integrated control signal. That is, under different control signal environments, only the switch device corresponding to the control signal needs to be selected to achieve the controllable series connection of the common anode LED lamp group and the common cathode LED lamp group. The lighting system is described in detail below with reference to specific embodiments.

[0023] See Figure 1 and Figure 6 , is the first embodiment of an LED string lamp provided by the present invention, which is connected to a central controller U via a connector CON-A, and the central controller U includes a driving power supply terminal 1, and control signal terminals 2, 3, and 4. The driving power output by the driving power supply terminal is +12V, and the control signal terminals 2, 3, and 4 output low-level control signals B-, G-, and R-, respectively. The switching module includes PNP transistors Q1, Q2, and Q3. The lighting module includes a four-pin common anode LED lamp group L2 and a four-pin common cathode LED lamp group L1, wherein the common anode LED lamp group includes a red LED lamp unit 21, a green LED lamp unit 22, and a blue LED lamp unit 23, and the common cathode LED lamp group includes a red LED lamp unit 11, a green LED lamp unit 12, and a blue LED lamp unit 13. The signal integration module includes diodes D1, D2, and D3. Next, combined with Figure 1The connection relationship of each component and the working principle of the lighting system are specifically described. The common anode end of the common anode LED lamp group L2 is connected to the driving power supply end 1, and the bases B of the transistors Q1, Q2, and Q3 are connected to the control signal ends 2, 3, and 4 of the central controller U through resistors R4, R5, and R6 respectively to receive low-level control signals B-, G-, and R-. The bases B of the transistors Q1, Q2, and Q3 are also connected to the common anode end of the common anode LED lamp group L2 through resistors R3, R2, and R1 respectively. The emitters E of the transistors Q1, Q2, and Q3 are respectively connected to the LED lamp units 23, 22, and 21 of the common anode LED lamp group L2. The collectors C of the transistors Q1, Q2, and Q3 are respectively connected to the lamp units 13, 12, and 11 of the common cathode LED lamp group L1 through resistors R8, R9, and R7. The common cathode end of the common cathode LED lamp group L1 is connected to the diode The positive electrodes of the transistors D1, D2, and D3, and the negative electrodes of the three diodes D1, D2, and D3 are respectively connected to the control output terminals 4, 3, and 2 of the central controller U. When the central controller U sends a low-level control signal B- through the control signal terminal 2, the transistor Q1 receives the low-level control signal B- and turns on the circuit consisting of the blue LED lamp 23 in the common anode LED lamp group L2, the transistor Q1, the blue LED lamp unit 13 in the common cathode LED lamp group L1, and the diode D3, lighting up the blue LED lamp unit 13 to achieve blue light lighting. Similarly, the lighting system can output control signals R-, G-, and B- through the control signal terminal to control the red lamp group - red LED lamp units 11 and 21, the green lamp group - green LED lamp units 12 and 22, and the blue lamp group - blue LED lamp units 13 and 23 separately or simultaneously, thereby achieving series controllable common anode LED lamp groups and common cathode LED lamp groups. In this first embodiment, the central control module U outputs a high-level driving power supply and a low-level control signal to realize the loop control of the lighting system. When the central control module U outputs a low-level driving power supply and a high-level control signal to realize the loop control of the lighting system, it is only necessary to interchange the positions of the common anode LED lamp group L2 and the common cathode LED lamp group L1, and replace the PNP switch device with an NPN switch device to realize the series controllable common anode LED lamp group and the common cathode LED lamp group. The connection method and working principle are similar to those of this embodiment and are not described in detail here.

[0024] See Figure 2 and Figure 6, is a second embodiment of an LED string lamp provided by the present invention. Different from the first embodiment, the switch module includes PMOS tubes P-MOS1, P-MOS2, and P-MOS3, wherein the gates G of the PMOS tubes P-MOS1, P-MOS2, and P-MOS3 are respectively connected to the control signal terminals 2, 3, and 4 of the central controller U through the connector CON-A to receive the low-level control signals B-, G-, and R-. The gates G of the PMOS tubes P-MOS1, P-MOS2, and P-MOS3 are also respectively connected to the common anode terminal of the common anode LED lamp group L7 through the resistors R12, R11, and R10. The source electrodes S of the PMOS tubes P-MOS1, P-MOS2, and P-MOS3 are respectively connected to the LED lamp units 73, 72, and 71 of the common anode LED lamp group L7. The drain D is connected to the lamp units 33, 32, and 31 of the common cathode LED lamp group LRR3 through resistors R29, R30, and R28 respectively. When the central controller U sends a low-level control signal B- through the control signal terminal 2, the PMOS tube P-MOS1 receives the low-level control signal B- and turns on the loop composed of the blue LED lamp 73 in the common anode LED lamp group L7, the PMOS tube P-MOS1, the blue LED lamp unit 33 in the common cathode LED lamp group L3, and the diode D6, lighting up the blue LED lamp unit 33 to achieve blue light lighting. Similarly, the lighting system can output control signals R-, G-, and B- through the control signal terminal to control the red lamp group - red LED lamp units 71 and 31, the green lamp group - green LED lamp units 72 and 32, and the blue lamp group - blue LED lamp units 73 and 33 separately or simultaneously, thereby realizing the series controllable common anode LED lamp group and common cathode LED lamp group. In the second embodiment, the central control module U outputs a high-level driving power supply and a low-level control signal to realize the loop control of the lighting system. When the central control module U outputs a low-level driving power supply and a high-level control signal to realize the loop control of the lighting system, it is only necessary to interchange the positions of the common anode LED lamp group L7 and the common cathode LED lamp group L3, and replace the PMOS tube with an NMOS tube to realize the series controllable common anode LED lamp group and the common cathode LED lamp group. The connection method and working principle are similar to those of this embodiment and will not be elaborated here.

[0025] See Figure 3 and Figure 6, is a third embodiment of an LED string lamp provided by the present invention. It is different from the first embodiment in that the signal integration module is specifically a common anode LED lamp group L6. Since the four-legged LED lamp group is essentially composed of three diodes, in this lighting system, the lamp unit of the LED lamp group L6 can not only play a unidirectional conduction role to realize the function of integrating signals by the signal integration module, but also can be used as a lighting device to divide the voltage to realize the lighting function. The common anode LED lamp group L6 includes a red LED lamp unit 61, a green LED lamp unit 62, and a blue LED lamp unit 63. The common anode end of the common anode LED lamp group L6 is connected in series to the common cathode end of the common cathode LED lamp group L4. The lamp units 61, 62, and 63 of the common anode LED lamp group are connected to the control signal terminals 2, 3, and 4 of the central controller U through R22, R24, and R23 respectively. Its working principle is similar to that of the lighting system in Example 1 and will not be repeated here.

[0026] See Figure 4 and Figure 6 , is the fourth embodiment of an LED string lamp provided by the present invention. It is different from the second embodiment in that the signal integration module is specifically a common anode LED lamp group L10. Since the four-legged LED lamp group is essentially composed of three diodes, in this lighting system, the lamp unit of the LED lamp group L10 can not only play a unidirectional conduction role to realize the function of integrating signals by the signal integration module, but also can be used as a lighting device to divide the voltage to realize the lighting function. The common anode LED lamp group L10 includes a red LED lamp unit 101, a green LED lamp unit 102, and a blue LED lamp unit 103. The common anode end of the common anode LED lamp group L10 is connected in series to the common cathode end of the common cathode LED lamp group L8. The lamp units 101, 102, and 103 of the common anode LED lamp group are connected to the control signal terminals 2, 3, and 4 of the central controller U through R40, R42, and R41 respectively. Its working principle is similar to that of the lighting system in Example 2 and will not be repeated here.

[0027] See Figure 5 and Figure 6 , is a fifth embodiment of an LED string lamp provided by the present invention. It differs from other embodiments in that the driving power supply voltage of the central controller U is 24V, and the control signal is a low-level control signal. In this embodiment, the common anode LED lamp group, the switch module, and the common cathode LED lamp group connected in series are used as the first overall lighting module. By connecting in series, the lighting system can be expanded to connect the second overall lighting module, the third overall lighting module, etc. to adapt to different voltages, wherein the switch module in the overall lighting module is not limited to Figure 5 The MOS tube shown in FIG can also be a triode, referring to the first embodiment. Of course, since the use of the MOS tube does not require a series resistor between the control signal terminal and the switch device, the volume of the entire lighting system can be further reduced. Figure 5 As shown, these lighting modules share the same signal integration module, which includes diodes D7, D8, and D9. Of course, referring to the third and fourth embodiments, the signal integration module can be replaced with a four-pin LED lamp group. When the central controller U sends a low-level control signal B- through the control signal terminal 2, all PMOS tubes P-MOS in the lighting system receive the low-level control signal B-, and turn on the loop composed of the first overall lighting module, the second overall lighting module, the third overall lighting module and the switch module, lighting up all blue LED lamp units in the circuit system to achieve blue light lighting. Similarly, the lighting system can output control signals R-, G-, and B- through the control signal terminal to control the red lamp group, the green lamp group and the blue lamp group individually or simultaneously, thereby realizing the series controllable common anode LED lamp group and common cathode LED lamp group in multiple lighting overall modules.

[0028] The LED series lamp lighting system provided by the present invention realizes the series controllable connection of common anode LED lamp groups and common cathode LED lamp groups, making the lighting system have better versatility. The lighting device using this lighting system has the advantage of being smaller in size than traditional LED lighting devices, which can save materials and reduce production costs, and optimize the user experience.

[0029] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An LED string lamp, which is used in a controlled lighting system, wherein the controlled lighting system includes a central controller for outputting a driving power supply and a control signal, and the LED string lamp includes a switch module, a lighting module, and a signal integration module, characterized in that: The lighting module includes at least one common anode LED lamp group and at least one common cathode LED lamp group, wherein a common anode end of the common anode LED lamp group or a common cathode end of the common cathode LED lamp group receives a driving power supply; the switch module is used to receive a control signal and conduct the lighting module circuit according to the control signal, the switch module is electrically connected to the central controller and is connected in series between the cathode end of the common anode LED lamp group and the anode end of the common cathode LED lamp group; the signal integration module is used to integrate a plurality of the control signals, the signal integration module is electrically connected between the common cathode end of the common cathode LED lamp group and the central controller, or electrically connected between the common anode end of the common anode LED lamp group and the central controller; the common anode LED lamp group and the common cathode LED lamp group each include LED lamp units corresponding one-to-one to the plurality of the control signals; the control lighting system controls the LED lamp units corresponding one-to-one to the control signals individually or simultaneously through the plurality of the control signals; wherein the switch module includes switch devices corresponding one-to-one to the control signals, and the switch devices are connected in series with the LED lamp units in a one-to-one correspondence; Among them, the signal integration module includes diodes corresponding one-to-one to the control signals, one end of these diodes is uniformly connected to the common anode end of the common anode LED lamp group or uniformly connected to the common cathode end of the common cathode LED lamp group, and the other end of these diodes is respectively connected one-to-one to the control signal end of the central controller.

2. The LED string lamp according to claim 1, characterized in that: The switching devices include but are not limited to triodes, MOS tubes, photoelectric coupling devices, and relays.

3. The LED string lamp according to claim 2, characterized in that: The control signal is a low-level control signal, and the transistor is specifically a PNP transistor.

4. The LED string lamp according to claim 2, characterized in that: The control signal is a high-level control signal, and the switching device is specifically an NPN transistor.

5. The LED string lamp according to claim 1, characterized in that: The control signal is a low-level control signal, and the signal integration module can be specifically a common-anode LED lamp group, which includes LED lamp units corresponding to the control signal one by one.

6. The LED string lamp according to claim 1, characterized in that: The control signal is a high-level control signal. The signal integration module may be specifically a common-cathode LED lamp group, which includes LED lamp units corresponding to the control signal one by one.

7. An LED string lamp system comprising a central controller for outputting driving power and control signals, characterized in that: It also includes a predetermined number of LED string lamps according to any one of claims 1 to 6, and the LED string lamps are connected in parallel.

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