Two-foot multi-control multi-code three-color LED lamp bead and control circuit

Abstract

The utility model relates to the technical field of LED lamp pearl, concretely relates to a two foot multi -control multi -code three -color LED lamp pearl, and technical solution main points include including positive pole pin V+, negative pole pin V, drive IC, 1st color LED wafer, 2nd color LED wafer, 3rd color LED wafer, welding line and encapsulation, and positive pole pin V+ is used for connecting external communication circuit and is set 0-600 encoding data to drive IC for negative pole pin V. Control circuit includes resistance R1, resistance R2, resistance R3, resistance R4, switch tube Q2, switch tube Q3, switch tube Q1, capacitor C1, comparator A, is connected through the circuit, can effectively control the work of LED lamp pearl, and wants to guarantee the reliability of its LED lamp pearl work.

Description

Technical Field

[0001] This utility model relates to the technical field of LED lamp beads, specifically to a two-pin multi-control multi-code three-color LED lamp bead. Background Technology

[0002] Most tri-color LED beads on the market are either uncoded, have built-in flashing function, or are three-legged tri-color products.

[0003] The three-color LED beads without code and with built-in flashing function cannot achieve synchronous functions such as all beads lighting up and flashing at the same time after being made into a finished light string due to the positive and negative errors of the control IC inside the beads.

[0004] Because existing three-legged tri-color LED beads cannot be encoded, they cannot achieve functions such as running lights, simulating shapes and dynamics in finished light strings. Therefore, it is necessary to design two-legged, multi-control, multi-code tri-color LED beads. Utility Model Content

[0005] In order to solve the technical problems and shortcomings of the prior art, the present invention provides a two-pin multi-control multi-code three-color LED lamp bead, which can overcome the technical problem of synchronous control of LED lamp beads, realize two-pin control of three colors, and has a coded function.

[0006] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0007] A two-pin multi-control, multi-code, three-color LED lamp bead includes a positive pin V+, a negative pin V-, a driver IC, a No. 1 color LED chip, a No. 2 color LED chip, a No. 3 color LED chip, bonding wires, and a package. The positive pin V+ and the negative pin V- are used to connect to an external communication line and to set the driver IC with 0-600 encoded data.

[0008] Preferably, the driver IC is a positive output IC or a negative output IC.

[0009] Preferably, the three control pins of the driver IC are respectively connected to LED chip No. 1, LED chip No. 2, and LED chip No. 3, and are controlled independently and in coordination.

[0010] Preferably, the LED chip of color 1, LED chip of color 2, and LED chip of color 3 are all LED chips of any one of the colors red, yellow, blue, green, and purple.

[0011] Preferably, the LED chip of color 1, LED chip of color 2 and LED chip of color 3 are all single-electrode LED light-emitting chips with vertical structure, or dual-electrode LED light-emitting chips with the same side structure.

[0012] In addition, a control circuit is provided to control the aforementioned two-pin multi-control, multi-code, three-color LED beads. This circuit includes resistors R1, R2, R3, and R4; switching transistors Q2, Q3, and Q1; capacitor C1; and comparator A. One end of resistor R1 and the source of switching transistor Q1 are connected to the voltage source VCC. The other end of resistor R1 is connected to one end of resistor R2, the drain of switching transistor Q2, and the drain of switching transistor Q3. The source of switching transistor Q2 is connected to the gate of switching transistor Q3, the source of switching transistor Q3, the positive terminal of capacitor C1, and the inverting input of comparator A. The output of comparator A is connected to the gate of switching transistor Q1. The non-inverting input of comparator A is connected to one end of resistor R3 and one end of resistor R4. The other end of resistor R3 is connected to the drain of switching transistor Q1 and the positive terminal of the LED bead. The other end of resistor R4 is connected to the negative terminal of the LED bead and grounded. The other end of resistor R2 and the negative terminal of capacitor C1 are both grounded.

[0013] Preferably, the gate of the switching transistor Q2 is used as the voltage control terminal.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model achieves three-color control by setting three-color LED chips connected to the driver IC, and by using the driver IC for encoding, each LED bead can be individually controlled.

[0016] 2. This utility model provides a control circuit. This circuit utilizes the signal amplification function of comparator A to enable the output voltage of the voltage source to change proportionally with the input voltage when the voltage source is used as the input voltage. Furthermore, the output voltage is less than the input voltage of the voltage source, thereby improving the safety and reliability of the control circuit.

[0017] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is an overall schematic diagram of the LED lamp bead in Embodiment 1 of this application;

[0020] Figure 2 This is a schematic diagram of the control circuit of Embodiment 2 of this application.

[0021] Explanation of reference numerals for major components:

[0022] 100, Positive pin V+; 200, Negative pin V-; 300, Driver IC; 400, LED chip of color 1; 500, LED chip of color 2; 600, LED chip of color 3; 700, Bonding wire; 800, Package; 900, Control circuit. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. The following specific examples illustrate the embodiments of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be changed at will, and the layout of the components may also be more complex.

[0025] It should be noted that in the description of this application, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Furthermore, it should be noted that in the description of this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances.

[0026] Example 1:

[0027] This invention discloses a two-pin multi-control, multi-code, three-color LED bead, as per the following embodiments. Figure 1As shown, the package includes a positive pin V+100+, a negative pin V-200, a driver IC 300, a color 1 LED chip 400, a color 2 LED chip 500, a color 3 LED chip 600, a bonding wire 700, and a package 800. The positive pin V+100+ and the negative pin V-200 are used to connect to external communication lines and to set the driver IC 300 with encoded data from 0 to 600. The driver IC 300 can be either a positive output IC or a negative output IC. The three control pins of the driver IC 300 are connected to the color 1 LED chip 400, the color 2 LED chip 500, and the color 3 LED chip 600, respectively, and can control them independently and in conjunction. The color 1 LED chip 400, the color 2 LED chip 500, and the color 3 LED chip 600 can all be any of the following colors: red, yellow, blue, green, and purple. LED chip 400 (color 1), LED chip 500 (color 2), and LED chip 600 (color 3) are all vertically structured single-electrode LED chips or dual-electrode LED chips with a same-side structure.

[0028] Therefore, according to the above scheme, LED beads within the 0-600 code range can be arbitrarily controlled to emit light via an external serial pulse signal. Once manufactured into a finished light string, it can achieve synchronized lighting, running lights, and static and dynamic displays of various images. This enables lighting control effects that traditional light string products cannot achieve.

[0029] Example 2:

[0030] Based on Embodiment 1, further designs are possible, differing from Embodiment 1 in that a control circuit 900 is also provided, as referenced. Figure 2 As shown, the control of the aforementioned two-pin multi-control, multi-code tri-color LED beads includes resistors R1, R2, R3, and R4, switching transistors Q2, Q3, and Q1, capacitor C1, and comparator A. One end of resistor R1 and the source of switching transistor Q1 are connected to the voltage source VCC. The other end of resistor R1 is connected to one end of resistor R2, the drain of switching transistor Q2, and the drain of switching transistor Q3. The source of switching transistor Q2 is connected to the gate of switching transistor Q3, the source of switching transistor Q3, the positive terminal of capacitor C1, and the inverting input of comparator A. The output of comparator A is connected to the gate of switching transistor Q1. The non-inverting input of comparator A is connected to one end of resistor R3 and one end of resistor R4. The other end of resistor R3 is connected to the drain of switching transistor Q1 and the positive terminal of the LED bead. The other end of resistor R4 is connected to the negative terminal of the LED bead and grounded. The other end of resistor R2 and the negative terminal of capacitor C1 are both grounded. The gate of switching transistor Q2 serves as the voltage control terminal.

[0031] In this design, capacitor C1 acts as an AC coupling capacitor, allowing AC current to pass while blocking DC current. Voltage source VCC provides power, which is divided by resistors R1 and R2 and supplied to switches Q2 and Q3. This generates the first intermediate signal S1, which, through comparator A and subsequent circuitry, produces an intermediate signal S2 at the non-inverting input of the comparator. Initially, switch Q2 is on to rapidly charge capacitor C1. When the circuit is operating normally (capacitor C1 is fully charged), switch Q2 is off. At this point, the voltage value of signal S1 is equal to R2 / (R1+R2) times the VCC value, and also equal to R4 / (R3+R4) times the Sd signal value, which is the voltage value of signal S2.

[0032] Therefore, by determining the resistance values ​​of resistors R1-R4, it can be determined that the voltage value of signal Sd is proportional to the voltage value of VCC. To ensure safe and reliable operation, in this scheme, the proportionality coefficient can be controlled by the resistance values ​​of R1-R4, that is, the voltage value of Sd = a × the voltage value of VCC. 'a' is a coefficient, controlled to be less than 1, and is adjusted by the resistance values ​​of R1-R4. a = [R2 / (R1+R2)] × [(R3+R4) / R4].

[0033] Therefore, when the voltage source VCC is 5V and a is 0.8, the output voltage Sd is 4V; when VCC is 3.3V, the output voltage Sd is 2.64V. The advantage of this design is that voltage changes in the power supply can be directly fed back to the LED beads, allowing them to receive the changes and thus achieve communication or encoding. Encoding and recording of the LED beads can be achieved based on voltage changes. Since the voltage at this time is lower than the input voltage source VCC, overvoltage of the LED beads can also be avoided.

[0034] This invention achieves three-color control by connecting three-color LED chips to a driver IC300, and by using the driver IC300 for encoding, each LED can be individually controlled.

[0035] A control circuit 900 is provided. This circuit utilizes the signal amplification function of comparator A to enable the output voltage of the voltage source to change proportionally with the input voltage when the voltage source is used as the input voltage. Furthermore, the output voltage is less than the input voltage of the voltage source, thereby improving the safety and reliability of the control circuit 900.

[0036] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-pin multi-control, multi-code, three-color LED bead, comprising a positive electrode pin V+ (100)+, a negative electrode pin V- (200), a driver IC (300), a No. 1 color LED chip (400), a No. 2 color LED chip (500), a No. 3 color LED chip (600), bonding wires (700), and a package (800), characterized in that, The positive pin V+(100)+ and the negative pin V-(200) are used to connect to external communication lines and set the 0-600 encoded data of the driver IC(300).

2. The two-pin multi-control, multi-code, three-color LED lamp bead according to claim 1, characterized in that, The driver IC (300) is either a positive output IC or a negative output IC.

3. The two-pin multi-control, multi-code, three-color LED lamp bead according to claim 1, characterized in that, The three control pins of the driver IC (300) are respectively connected to LED chip No. 1 (400), LED chip No. 2 (500), and LED chip No. 3 (600), and can be controlled independently and in coordination.

4. The two-pin multi-control, multi-code, three-color LED lamp bead according to claim 1, characterized in that, The No. 1 color LED chip (400), No. 2 color LED chip (500) and No. 3 color LED chip (600) are all LED chips of any color including red, yellow, blue, green and purple.

5. The two-pin multi-control, multi-code, three-color LED bead according to claim 1, characterized in that, The No. 1 color LED chip (400), No. 2 color LED chip (500) and No. 3 color LED chip (600) are all vertical single-electrode LED light-emitting chips or dual-electrode LED light-emitting chips with the same side structure.

6. A control circuit (900) for controlling the two-pin multi-control, multi-code, three-color LED beads according to any one of claims 1-5, characterized in that, The circuit includes resistors R1, R2, R3, and R4; transistors Q2, Q3, and Q1; capacitor C1; and comparator A. One end of resistor R1 and the source of transistor Q1 are connected to the voltage source VCC. The other end of resistor R1 is connected to one end of resistor R2, the drain of transistor Q2, and the drain of transistor Q3. The source of transistor Q2 is connected to the gate of transistor Q3, the source of transistor Q3, the positive terminal of capacitor C1, and the inverting input of comparator A. The output of comparator A is connected to the gate of transistor Q1. The non-inverting input of comparator A is connected to one end of resistor R3 and one end of resistor R4. The other end of resistor R3 is connected to the drain of transistor Q1 and the positive terminal of the LED. The other end of resistor R4 is connected to the negative terminal of the LED and grounded. The other end of resistor R2 and the negative terminal of capacitor C1 are both grounded.

7. The control circuit (900) according to claim 6, characterized in that, The gate of the switching transistor Q2 serves as the voltage control terminal.

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