LED lamp bead capable of achieving two-way transmission and LED display module thereof

Abstract

An LED lamp bead capable of achieving two-way transmission comprises a control chip and an RGB three-primary-color chip. The control chip controls the turn-on or turn-off time sequence of the RGB three-primary-color chip according to an input signal; the first single-pole double-throw analog switch chip is provided with a first movable contact, a first normally closed contact and a first normally open contact, the first movable contact is connected with a BRX pin, the first normally closed contact is connected with a first output pin of the control chip, and the second normally open contact is connected with a second output pin of the control chip. The first normally open contact is connected with a first input pin of the control chip; and the second single-pole double-throw analog switch chip is provided with a second movable contact, a second normally-closed contact and a second normally-open contact, the second movable contact is connected with the TX pin, the second normally-closed contact is connected with the second output pin of the control chip, and the second normally-open contact is connected with the second input pin of the control chip. The utility model has the function of two-way transmission of control signals.

Description

Technical Field

[0001] This utility model relates to the field of LED display module manufacturing technology, and in particular to a bidirectional LED bead and its LED display module. Background Technology

[0002] Existing LED display modules are becoming increasingly diverse in shape, such as irregular shapes like leaves and petals. This requires LEDs in the same row to be powered in opposite directions, making it easier to trim excess LEDs at the end according to the display shape. Figure 4 As shown, several LED beads are connected in series in each row, with the current direction of some beads 110 being opposite to that of other beads 120; this necessitates that each row of LED beads be controlled by the control circuit 130 using two I / O ports (e.g., ...). Figure 4 As shown, two rows of LED beads require 4 I / O ports. For a typical 64-channel display screen, the control circuit 130 would require 128 I / O ports. This not only increases the complexity of the control circuit 130 program but also increases its cost. Utility Model Content

[0003] The purpose of this application is to provide an LED bead capable of bidirectional signal transmission and its LED display module.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bidirectional LED light bead includes a control chip, an R / G / B tri-color chip, and BRX, RX, VCC, GND, RX1, and TX pins. The control chip controls the on / off timing of the R / G / B tri-color chip according to the input signal. It also includes a first single-pole double-throw (SPDT) analog switch chip and a second SPDT analog switch chip. The first SPDT analog switch chip has a first moving contact, a first normally closed contact, and a first normally open contact. The first moving contact is connected to the BRX pin, the first normally closed contact is connected to the first output pin of the control chip, and the first normally open contact is connected to the first input pin of the control chip. The second SPDT analog switch chip has a second moving contact, a second normally closed contact, and a second normally open contact. The second moving contact is connected to the TX pin, the second normally closed contact is connected to the second output pin of the control chip, and the second normally open contact is connected to the second input pin of the control chip.

[0006] This utility model also provides a bidirectional LED display module, including a matrix arrangement of several LED beads and an LED main control circuit board. The LED beads are the aforementioned bidirectional LED beads. Each row of LED beads is connected in series with the BRX pin of the adjacent phase at least through the RX1 pin. Each output pin of the LED main control circuit board is connected only to the connection between the RX1 pin of one row and the BRX pin of the adjacent phase, so that the current direction of some LED beads is opposite to the current direction of other LED beads.

[0007] As an improvement to this utility model, the control chip, the first single-pole double-throw analog switch chip, and the second single-pole double-throw analog switch chip are integrated into one integrated chip.

[0008] As an improvement to this utility model, the integrated chip is an integrated chip with the model number CN6501.

[0009] As an improvement to this utility model, the control chip, the first single-pole double-throw analog switch chip, and the second single-pole double-throw analog switch chip are independent components.

[0010] As an improvement to this utility model, the control chip is a chip with the model number TLC5940 / 5973, and the first single-pole double-throw analog switch chip and the second single-pole double-throw analog switch chip are chips with the model number TI TS3A5017.

[0011] This utility model employs a control chip, an R / G / B three-primary-color chip, and BRX, RX, VCC, GND, RX1, and TX pins; the control chip controls the timing of turning the R / G / B three-primary-color chip on or off according to the input signal. It also includes a first single-pole double-throw (SPDT) analog switch chip and a second SPDT analog switch chip. The first SPDT analog switch chip has a first moving contact, a first normally closed contact, and a first normally open contact. The first moving contact is connected to the BRX pin, the first normally closed contact is connected to the first output pin of the control chip, and the first normally open contact is connected to the first input pin of the control chip. The second SPDT analog switch chip has a second moving contact, a second normally closed contact, and a second normally open contact. The second moving contact is connected to the TX pin, the second normally closed contact is connected to the second output pin of the control chip, and the second normally open contact is connected to the second input pin of the control chip. Therefore, this invention has the function of bidirectional transmission of control signals. The LED display module made with this type of LED bead can eliminate half of the control ports on the main control circuit board, greatly simplifying the circuit structure of the LED display module. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the structure of the LED lamp bead of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of one embodiment of the LED display module of this utility model.

[0014] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0015] Figure 4 This is a structural diagram of an existing LED display module. Detailed Implementation

[0016] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Please see Figure 1 , Figure 1The invention discloses a bidirectional LED light bead, including a control chip 1, an R / G / B tri-color chip, and BRX pin, RX pin, VCC pin, GND pin, RX1 pin and TX pin; the control chip 1 controls the timing of turning the R / G / B tri-color chip on or off according to the input signal. It also includes a first single-pole double-throw analog switch chip 2 and a second single-pole double-throw analog switch chip 3. The first single-pole double-throw analog switch chip 2 has a first moving contact 21, a first normally closed contact 22 and a first normally open contact 23. The first moving contact 21 is connected to the BRX pin, the first normally closed contact 22 is connected to the first output pin 11 of the control chip 1, and the first normally open contact 23 is connected to the first input pin 12 of the control chip 1. The second single-pole double-throw analog switch chip 3 has a second moving contact 31, a second normally closed contact 32 and a second normally open contact 33. The second moving contact 31 is connected to the TX pin, the second normally closed contact 32 is connected to the second output pin 13 of the control chip 1, and the second normally open contact 33 is connected to the second input pin 14 of the control chip 1.

[0018] During operation, when a control signal is input from the BRX pin, the first moving contact 21 of the first single-pole double-throw analog switch chip 2 switches to connect with the first normally open contact 23. In this way, the control signal is input from the BRX pin, passes through the first input pin 12 and the control chip 1, and is output from the second output pin 13 of the control chip 1, the second moving contact 31 connected to the second output pin 13, and the TX pin, realizing the transmission of the control signal in one direction.

[0019] When a control signal is input from the TX pin, the second moving contact 31 of the second single-pole double-throw analog switch chip 3 switches to connect with the second normally open contact 33. Thus, the control signal, input from the TX pin, passes through the second input pin 14 and the control chip 1, and is output from the first output pin 11 of the control chip 1, the first moving contact 21 connected to the first output pin 11, and the BRX pin, achieving bidirectional transmission of the control signal.

[0020] Preferably, the control chip 1, the first single-pole double-throw analog switch chip 2, and the second single-pole double-throw analog switch chip 3 are integrated chips.

[0021] Preferably, the integrated chip is an integrated chip with model number CN6501, which is publicly sold by Shenzhen Huayi Brothers Optoelectronics Co., Ltd.

[0022] Preferably, the control chip 1, the first single-pole double-throw (SPD) analog switch chip 2, and the second SPD analog switch chip 3 are independent components. Specifically, the control chip 1 is a TLC5940 / 5973 chip, and the first SPD analog switch chip 2 and the second SPD analog switch chip 3 are TI TS3A5017 chips. Obviously, the model numbers of the control chip 1 and the first SPD analog switch chip 2 and the second SPD analog switch chip 3 are not limited in this invention; any corresponding component with equivalent function can be used as a substitute.

[0023] This utility model also provides a bidirectional LED display module, including a matrix arrangement of several LED beads 100 and an LED main control circuit board 200. The LED beads 100 are the aforementioned bidirectional LED beads. Each row of LED beads 100 is connected in series with the BRX pin of the adjacent phase through at least the RX1 pin. Each output pin of the LED main control circuit board 200 is connected only to the connection between the RX1 pin of one row and the BRX pin of the adjacent phase, so that the current direction of some of the beads is opposite to the current direction of the other beads.

[0024] Because this invention uses bidirectional LED beads, the input pins of the LED main control circuit board 200 can be input from the connection between the RX1 pin of any two adjacent LED beads 100 and the BRX pin of the adjacent phase. Then, the control signal can flow from the connection between the RX1 pin and the BRX pin of the adjacent phase to the opposite ends, realizing bidirectional input. This also saves half of the input pins of the LED main control circuit board 200, simplifying the structure of the LED display module.

[0025] Preferably, the control chip 1, the first single-pole double-throw analog switch chip 2, and the second single-pole double-throw analog switch chip 3 are integrated chips.

[0026] Preferably, the integrated chip is an integrated chip with model number CN6501, which is publicly sold by Shenzhen Huayi Brothers Optoelectronics Co., Ltd.

[0027] Preferably, the control chip 1, the first single-pole double-throw (SPD) analog switch chip 2, and the second SPD analog switch chip 3 are independent components. Specifically, the control chip 1 is a TLC5940 / 5973 chip, and the first SPD analog switch chip 2 and the second SPD analog switch chip 3 are TI TS3A5017 chips. Obviously, the model numbers of the control chip 1 and the first SPD analog switch chip 2 and the second SPD analog switch chip 3 are not limited in this invention; any corresponding component with equivalent function can be used as a substitute.

[0028] In this invention, the RX pin is the first receive data pin, the TX pin is the transmit data pin, and the BRX pin is the second receive data pin; the RX1 pin is an unused pin and is directly connected to the RX pin via a wire during use.

[0029] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A bidirectional LED light bead, comprising a control chip (1), an R / G / B tri-color chip, and BRX pin, RX pin, VCC pin, GND pin, RX1 pin, and TX pin; wherein the control chip (1) controls the lighting-on or lighting-off sequence of the R / G / B tri-color chip according to the input signal; characterized in that, It also includes a first single-pole double-throw analog switch chip (2) and a second single-pole double-throw analog switch chip (3). The first single-pole double-throw analog switch chip (2) has a first moving contact (21), a first normally closed contact (22) and a first normally open contact (23). The first moving contact (21) is connected to the BRX pin, the first normally closed contact (22) is connected to the first output pin (11) of the control chip (1), and the first normally open contact (23) is connected to the first input pin (12) of the control chip (1). The second single-pole double-throw analog switch chip (3) has a second moving contact (31), a second normally closed contact (32) and a second normally open contact (33). The second moving contact (31) is connected to the TX pin, the second normally closed contact (32) is connected to the second output pin (13) of the control chip (1), and the second normally open contact (33) is connected to the second input pin (14) of the control chip (1).

2. The bidirectional LED bead according to claim 1, characterized in that, The control chip (1), the first single-pole double-throw analog switch chip (2), and the second single-pole double-throw analog switch chip (3) are integrated chips.

3. The bidirectional LED bead according to claim 2, characterized in that, The integrated chip is an integrated chip with the model number CN6501.

4. The bidirectional LED bead according to claim 1, characterized in that, The control chip (1), the first single-pole double-throw analog switch chip (2), and the second single-pole double-throw analog switch chip (3) are independent components.

5. The bidirectional LED bead according to claim 4, characterized in that, The control chip (1) is a chip with the model number TLC5940 / 5973, and the first single-pole double-throw analog switch chip (2) and the second single-pole double-throw analog switch chip (3) are chips with the model number TI TS3A5017.

6. A bidirectional LED display module, characterized in that, The system includes a matrix arrangement of several LED beads (100) and an LED main control circuit board (200). The LED beads (100) are bidirectional LED beads as described in any one of claims 1-5. Each row of LED beads (100) is connected in series with the BRX pin of the adjacent phase at least through the RX1 pin. Each output pin of the LED main control circuit board (200) is connected only to the line connecting the RX1 pin of one row to the BRX pin of the adjacent phase, so that the current direction of some of the LED beads is opposite to the current direction of the other LED beads.

7. The bidirectional LED display module according to claim 6, characterized in that, The control chip (1), the first single-pole double-throw analog switch chip (2), and the second single-pole double-throw analog switch chip (3) are integrated chips.

8. The bidirectional LED display module according to claim 7, characterized in that, The integrated chip is an integrated chip with the model number CN6501.

9. The bidirectional LED display module according to claim 6, characterized in that, The control chip (1), the first single-pole double-throw analog switch chip (2), and the second single-pole double-throw analog switch chip (3) are independent components.

10. The bidirectional LED display module according to claim 9, characterized in that, The control chip (1) is a chip with the model number TLC5940 / 5973, and the first single-pole double-throw analog switch chip (2) and the second single-pole double-throw analog switch chip (3) are chips with the model number TI TS3A5017.

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