LED display screen and LED display driving circuit thereof

Abstract

The application discloses an LED display screen and an LED display driving circuit thereof. The LED display driving circuit comprises a power module, a row pipe module and a driving module. The power module comprises a first channel and a second channel. The power module is configured to output a lamp bead working voltage through the first channel and is configured to be grounded through the second channel, or the power module is configured to output the lamp bead working voltage through the second channel and is configured to be grounded through the first channel. The row pipe module comprises at least one row output channel. One end of the row output channel is electrically connected to the first channel, and the other end of the row output channel is electrically connected to the first end of all LED lamp beads of a pixel point. The driving module comprises at least one column output channel. One end of the column output channel is electrically connected to the second channel, and the other end of the column output channel is electrically connected to the second end of all LED lamp beads of the pixel point. The technical scheme can complete common cathode energy-saving scheme design and common anode energy-saving scheme design simultaneously through layout design of one printed circuit board.

Description

Technical Field

[0001] This application relates to the field of LED display technology, and in particular to an LED display screen and its LED display driving circuit. Background Technology

[0002] Current LED display principles are based on progressive scan driving, including multi-line scan driving and single-line driving (also called static display). As the pixel pitch of LED displays becomes increasingly smaller, the large number of column driving modules (i.e., constant current driving modules) required for single-line driving can no longer be placed on LED displays. Therefore, most existing LED displays use multi-line scan driving. Multi-line scan driving displays show one line at a time, progressively displaying each line to form a complete image. Row scanning is controlled by a row scanning module (i.e., row driving module), while column display is controlled by a constant current driving module (i.e., column driving module).

[0003] In existing technologies, conventional three-color six-pin LED chips have separate positive and negative terminals for the red, green, and blue light-emitting chips. However, as the pixel pitch of LED displays continues to decrease, the six-pin package of the chips no longer meets size requirements, and four-pin packages are becoming more common, where the positive or negative terminals of the three colors (red, green, and blue) share a single conductive pin. A common anode is when the three positive terminals share a single conductive pin, and a common cathode is when the three negative terminals share a single conductive pin. To meet customer needs, the industry commonly uses common cathode and common anode energy-saving solutions. However, currently, these two energy-saving design solutions are designed separately, resulting in two types of circuit boards and increasing development and management costs. Utility Model Content

[0004] This application provides an LED display screen and its LED display driver circuit, aiming to improve the technical problem that the common cathode energy-saving scheme and common anode energy-saving scheme of the existing LED display driver circuit are designed separately, resulting in two types of circuit boards and increasing development and management costs.

[0005] Therefore, this application provides an LED display driving circuit for use in an LED display screen. The LED display screen includes multiple pixels arranged in an array, and each pixel includes red LEDs, green LEDs, and blue LEDs. The LED display driving circuit includes a power supply module, a horizontal output transistor module, and a driving module. The power module includes a first channel and a second channel. The power module is configured such that the first channel outputs the working voltage of the LED beads and the second channel is grounded, or the second channel outputs the working voltage of the LED beads and the first channel is grounded. The row output module includes at least one row output channel, one end of which is electrically connected to the first channel, and the other end of which is electrically connected to the first end of all the LED beads of the pixel. The driving module includes at least one column output channel, one end of which is electrically connected to the second channel, and the other end of which is electrically connected to the second end of all the LED beads of the pixel.

[0006] Optionally, in some embodiments of this application, the power module further includes a power module, a grounding module, a first switching component, and a second switching component. The first channel is switched between the power module and the grounding module via the first switching component, and the second channel is switched between the power module and the grounding module via the second switching component.

[0007] Optionally, in some embodiments of this application, the power supply module includes a first power supply unit that outputs a first operating voltage and a second power supply unit that outputs a second operating voltage.

[0008] Optionally, in some embodiments of this application, the first channel includes a first sub-channel and a second sub-channel, and the first switching component includes a first switching switch and a second switching switch; The first sub-channel is switched between the first power supply unit and the grounding module via the first switching switch; The second sub-channel is connected to the second power supply unit and the grounding module via the second switching switch.

[0009] Optionally, in some embodiments of this application, the second channel includes a third sub-channel and a fourth sub-channel, and the second switching component includes a third switching switch and a fourth switching switch; The third sub-channel is connected to the first power supply unit and the grounding module via the third switching switch; The fourth sub-channel is connected to the second power supply unit and the grounding module via the fourth switching switch.

[0010] Optionally, in some embodiments of this application, the line output channel includes a first line tube and a second line tube; The first end of the first row transistor is electrically connected to the first sub-channel, and the second end of the first row transistor is electrically connected to the first end of the red LED bead of the pixel. The first end of the second row transistor is electrically connected to the second sub-channel, and the second end of the second row transistor is electrically connected to the first end of the green LED bead and the first end of the blue LED bead of the pixel, respectively.

[0011] Optionally, in some embodiments of this application, both the first and second row transistors are common anode row transistors, the first end of the LED bead is the anode, and the second end of the LED bead is the cathode; or, Both the first and second row transistors are common cathode row transistors, with the first end of the LED bead being the cathode and the second end being the anode.

[0012] Optionally, in some embodiments of this application, the column output channel includes a first driver chip, a second driver chip, and a third driver chip; The first end of the first driver chip is electrically connected to the third sub-channel, and the second end of the first driver chip is electrically connected to the second end of the red LED bead of the pixel. The first end of the second driver chip is electrically connected to the fourth sub-channel, and the second end of the second driver chip is electrically connected to the second end of the green LED bead of the pixel. The first end of the third driving chip is electrically connected to the fourth sub-channel, and the second end of the third driving chip is electrically connected to the second end of the blue LED bead of the pixel.

[0013] Optionally, in some embodiments of this application, the LED display driving circuit further includes a signal transceiver, which is electrically connected to the signal enable terminal of the row control module and the signal enable terminal of the driving module, respectively.

[0014] In addition, this application embodiment also provides an LED display screen, including a plurality of pixels arranged in an array and the above-mentioned LED display driving circuit, wherein each pixel includes a red LED, a green LED and a blue LED.

[0015] The technical solution provided in this application, through the aforementioned structural configuration, allows the LED display driver circuit to achieve both common-anode and common-cathode energy-saving layouts by changing the voltage output states of the first and second channels, selecting different horizontal output transistor modules and different driver modules, and adjusting the mounting direction of each LED bead. In other words, the technical solution of this application can simultaneously complete both common-cathode and common-anode energy-saving schemes through a single printed circuit board layout design. Therefore, this technical solution effectively addresses the technical problem of existing LED display driver circuits where common-cathode and common-anode energy-saving schemes are designed separately, resulting in two types of circuit boards and increased development and management costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the LED display driving circuit in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of the power supply module of the LED display driver circuit. Figure 3 for Figure 1 The diagram shows a common-cathode energy-saving scheme for the LED display driver circuit. Figure 4 for Figure 3 A schematic diagram of the current flow direction in the common cathode energy-saving scheme shown; Figure 5 for Figure 1 The diagram shows a common anode energy-saving scheme for the LED display driver circuit. Figure 6 for Figure 5 A schematic diagram of the current flow direction in the common anode energy-saving scheme shown; Figure 7 This is a schematic diagram of the LED display screen in the embodiments of this application; Figure 8 for Figure 7 The diagram shows a partial view of the LED display surface.

[0018] Figure label: 1. LED display driver circuit; 10. Power supply module; 11. First channel; 111. First sub-channel; 112. Second sub-channel; 12. Second channel; 121. Third sub-channel; 122. Fourth sub-channel; 13. Power supply module; 131. First power supply unit; 132. Second power supply unit; 14. Grounding module; 15. First switching component; 151. First switching switch; 152. Second switching switch; 16. Second switching component; 161. Third switching switch; 162. Fourth switching switch; 20. Horizontal output transistor module; 21. First horizontal output transistor; 22. Second horizontal output transistor; 30. Driver module; 31. First driver chip; 32. Second driver chip; 33. Third driver chip; 40. Signal transceiver; 2. Pixel. Detailed Implementation

[0019] The technical solutions of the embodiments 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. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed in this application.

[0022] In one embodiment, such as Figures 1 to 6 As shown in the figure, this application embodiment provides an LED display driving circuit 1, which includes a power supply module 10, a row output module 20, and a driving module 30. The power supply module 10 includes a first channel 11 and a second channel 12. The power supply module 10 is configured such that the first channel 11 outputs the LED bead operating voltage, and the second channel 12 is grounded; or the second channel 12 outputs the LED bead operating voltage, and the first channel 11 is grounded. The row output module 20 includes at least one row output channel. One end of the row output channel is electrically connected to the first channel 11, and the other end of the row output channel is electrically connected to the first end of all LED beads in the pixel 2. The driving module 30 includes at least one column output channel. One end of the column output channel is electrically connected to the second channel 12, and the other end of the column output channel is electrically connected to the second end of all LED beads in the pixel 2.

[0023] It is understood that the LED display driving circuit 1 in this application embodiment is mainly used in an LED display screen, which mainly includes multiple pixels 2 arranged in an array, and each pixel 2 includes a red LED bead (i.e., Figure 2 The LED beads (R) and green LED beads (i.e. Figure 2 The LED beads (G) and blue LED beads (i.e. Figure 2(LED bead B in the image). Therefore, the aforementioned electrical connection between the row output channel and the first end of all LED beads in pixel 2 can specifically mean that the row output channel is electrically connected to the first end of all LED beads in all pixels 2 in the same row, that is, the row output channel is electrically connected to the first end of all red LED beads, all green LED beads, and all blue LED beads in all pixels 2 in the corresponding row. The row output module 20 generally has multiple row output channels, and one row output channel corresponds to the driving display of one row of pixels 2 on the LED display screen. Similarly, the aforementioned electrical connection between the other end of the column output channel and the second end of all LED beads in pixel 2 can specifically mean that the other end of the column output channel is electrically connected to the second end of all LED beads in all pixels 2 in the same column, that is, the column output channel is electrically connected to the second end of all red LED beads, all green LED beads, and all blue LED beads in all pixels 2 in the corresponding column. The driving module 30 generally has multiple column output channels, and one column output channel corresponds to the driving display of one column of pixels 2 on the LED display screen. The aforementioned power module 10 is configured such that the first channel 11 outputs the LED bead operating voltage, and the second channel 12 is grounded, or the second channel 12 outputs the LED bead operating voltage, and the first channel 11 is grounded. Specifically, when the LED display driver circuit 1 forms a common anode energy-saving layout, its first channel 11 outputs the LED bead operating voltage, and the second channel 12 is grounded, with the current flowing out of the first channel 11 and into the second channel 12; while when the LED display driver circuit 1 forms a common cathode energy-saving layout, its second channel 12 outputs the LED bead operating voltage, and the first channel 11 is grounded, with the current flowing out of the second channel 12 and into the first channel 11.

[0024] In this way, the LED display driving circuit 1 in this embodiment of the application, through the above-described structural configuration, can achieve common anode energy-saving layout and common cathode energy-saving layout by changing the voltage output state of the first channel 11 and the second channel 12, selecting different horizontal output transistor modules 20 and different driving modules 30, and adjusting the installation direction of each LED bead. That is, the technical solution of this application can complete the common cathode energy-saving scheme design and the common anode energy-saving scheme design simultaneously through the layout design of a single printed circuit board.

[0025] In some examples, such as Figure 1 and Figure 2As shown, the power module 10 also includes a power module 13, a grounding module 14, a first switching component 15, and a second switching component 16. The first channel 11 is switched between the power module 13 and the grounding module 14 via the first switching component 15, and the second channel 12 is switched between the power module 13 and the grounding module 14 via the second switching component 16. Thus, with the above structural arrangement, when the first channel 11 is switched to be connected to the power module 13 via the first switching component 15, it can output the LED operating voltage; and when the first channel 11 is switched to be connected to the grounding module 14 via the first switching component 15, it can be grounded. Similarly, when the second channel 12 is switched to be connected to the power module 13 via the second switching component 16, it can output the LED operating voltage; and when the second channel 12 is switched to be connected to the grounding module 14 via the second switching component 16, it can be grounded.

[0026] In some examples, such as Figure 1 and Figure 2 As shown, the power module 13 includes a first power supply unit 131 that outputs a first operating voltage and a second power supply unit 132 that outputs a second operating voltage. Thus, with the above structural configuration, the power module 13 of this application can form a dual-voltage drive scheme, better adapting to the different voltage drive requirements of LED beads of different colors.

[0027] It should be noted that the first operating voltage in this example can be 2.8V, which can be used as the driving voltage for the red LED. The second operating voltage in this example can be 3.8V, which can be used as the driving voltage for the green and blue LEDs.

[0028] In some examples, such as Figure 1 and Figure 2 As shown, the first channel 11 includes a first sub-channel 111 and a second sub-channel 112, and the first switching component 15 includes a first switching switch 151 and a second switching switch 152. The first sub-channel 111 is switched between the first power supply unit 131 and the grounding module 14 via the first switching switch 151. The second sub-channel 112 is switched between the second power supply unit 132 and the grounding module 14 via the second switching switch 152. Thus, with the above structural configuration, when the first sub-channel 111 is switched to the first power supply unit 131 via the first switching switch 151, it can output a first operating voltage, and when the first sub-channel 111 is switched to the grounding module 14 via the first switching switch 151, it can be grounded. Similarly, when the second sub-channel 112 is switched to the second power supply unit 132 via the second switching switch 152, it can output a second operating voltage, and when the second sub-channel 112 is switched to the grounding module 14 via the second switching switch 152, it can be grounded.

[0029] In some examples, such as Figure 1 and Figure 2 As shown, the second channel 12 includes a third sub-channel 121 and a fourth sub-channel 122, and the second switching component 16 includes a third switching switch 161 and a fourth switching switch 162. The third sub-channel 121 is switched between the first power supply unit 131 and the grounding module 14 via the third switching switch 161. The fourth sub-channel 122 is switched between the second power supply unit 132 and the grounding module 14 via the fourth switching switch 162. Thus, with the above structural configuration, when the third sub-channel 121 is switched to the first power supply unit 131 via the third switching switch 161, it can output a first operating voltage, and when the third sub-channel 121 is switched to the grounding module 14 via the third switching switch 161, it can be grounded. Similarly, when the fourth sub-channel 122 is switched to the second power supply unit 132 via the fourth switching switch 162, it can output a second operating voltage, and when the fourth sub-channel 122 is switched to the grounding module 14 via the fourth switching switch 162, it can be grounded.

[0030] In some examples, such as Figure 1 , Figure 3 and Figure 5 As shown, the horizontal output channel includes a first horizontal output transistor 21 and a second horizontal output transistor 22. The first end of the first horizontal output transistor 21 is electrically connected to the first sub-channel 111, and the second end of the first horizontal output transistor 21 is electrically connected to the first end of the red LED bead of pixel 2. The first end of the second horizontal output transistor 22 is electrically connected to the second sub-channel 112, and the second end of the second horizontal output transistor 2 is electrically connected to the first ends of both the green and blue LED beads of pixel 2. Thus, with the above structural arrangement, the horizontal output channel of this example can better cooperate with the power module 13 to form a dual-voltage drive scheme, better adapting to the different voltage drive requirements of LED beads of different colors.

[0031] It should be noted that, specifically, the electrical connection between the second end of the first row transistor 21 and the first end of the red LED of pixel 2 in this example can be achieved by connecting the second end of the first row transistor 21 to the first ends of all the red LEDs of all pixels 2 in the same row, thus completing the row driving connection for all the red LEDs of pixel 2 in the corresponding row. Similarly, the electrical connection between the second end of the second row transistor 22 and the first ends of the green and blue LEDs of pixel 2 in this example can be achieved by connecting the second end of the second row transistor 22 to the first ends of all the green and blue LEDs of all pixels 2 in the same row, thus completing the row driving connection for all the green and blue LEDs of pixel 2 in the corresponding row.

[0032] In some examples, when the LED display driver circuit 1 in the previous example is formed Figure 5 In the dual-voltage common-anode energy-saving layout shown, the first sub-channel 111 outputs the first operating voltage, the second sub-channel 112 outputs the second operating voltage, and when the third sub-channel 121 and the fourth sub-channel 122 are grounded, their first horizontal output transistor 21 and second horizontal output transistor 22 are both common-anode horizontal output transistors (i.e., ...). Figure 6 (As shown in the PMOS transistor), at this time, the first end of the LED bead is the anode, and the second end of the LED bead is the cathode. The current flow direction of the entire driving circuit is as follows. Figure 6 As indicated by the arrow in the diagram. Similarly, when the LED display driver circuit 1 in the previous example is formed... Figure 3 In the dual-voltage common-cathode energy-saving layout shown, its third sub-channel 121 outputs the first operating voltage, and its fourth sub-channel 122 outputs the second operating voltage. When the first sub-channel 111 and the second sub-channel 112 are grounded, their first horizontal output transistor 21 and second horizontal output transistor 22 are both common-cathode horizontal output transistors (i.e., Figure 4 (As shown in the NMOS transistor diagram), at this time, the first end of the LED bead is the cathode, and the second end of the LED bead is the anode. The current flow direction of the entire driving circuit is as follows. Figure 4 As shown by the arrow in the image.

[0033] In some examples, such as Figure 1 , Figure 3 and Figure 5 As shown, the column output channel includes a first driver chip 31, a second driver chip 32, and a third driver chip 33. The first terminal of the first driver chip 31 is electrically connected to the third sub-channel 121, and the second terminal of the first driver chip 31 is electrically connected to the second terminal of the red LED bead in pixel 2. The first terminal of the second driver chip 32 is electrically connected to the fourth sub-channel 122, and the second terminal of the second driver chip 32 is electrically connected to the second terminal of the green LED bead in pixel 2. The first terminal of the third driver chip 33 is electrically connected to the fourth sub-channel 122, and the second terminal of the third driver chip 33 is electrically connected to the second terminal of the blue LED bead in pixel 2. Thus, with the above structural configuration, the column output channel in this example can better cooperate with the power module 13 to form a dual-voltage drive scheme, better adapting to the different voltage drive requirements of LED beads of different colors.

[0034] It should be noted that, specifically, the electrical connection between the second terminal of the first driver chip 31 and the second terminal of the red LED of pixel 2 in this example can be achieved by connecting the second terminal of the first driver chip 31 to the second terminals of all red LEDs of all pixels 2 in the same column, thereby completing the column driving connection for all red LEDs of pixel 2 in the corresponding column. Similarly, the electrical connection between the second terminal of the second driver chip 32 and the second terminal of the green LED of pixel 2 in this example can be achieved by connecting the second terminal of the second driver chip 32 to the second terminals of all green LEDs of all pixels 2 in the same column, thereby completing the column driving connection for all green LEDs of pixel 2 in the corresponding column. Likewise, the electrical connection between the second terminal of the third driver chip 33 and the second terminal of the blue LED of pixel 2 in this example can be achieved by connecting the second terminal of the third driver chip 33 to the second terminals of all blue LEDs of all pixels 2 in the same column, thereby completing the column driving connection for all blue LEDs of pixel 2 in the corresponding column.

[0035] In some examples, such as Figure 1 As shown, the LED display driving circuit 1 also includes a signal transceiver 40, which is electrically connected to the signal enable terminal of the row output module 20 and the signal enable terminal of the driving module 30. Thus, through the structural arrangement of the signal transceiver 40, the entire LED display driving circuit 1 can, under the control of the data signal received by the signal transceiver 40, drive the corresponding pixels 2 through the row output module 20 and the driving module 30 to perform corresponding display operations.

[0036] In one embodiment, such as Figure 7 and Figure 8 As shown, this application embodiment also provides an LED display screen 3, which includes a plurality of pixels 2 arranged in an array and an LED display driving circuit 1 as described above. Each pixel 2 includes a red LED, a green LED and a blue LED.

[0037] It is understood that the connection relationship between the LED display driving circuit 1 and each pixel 2 in this embodiment is as described above and will not be repeated here.

[0038] In this way, since the LED display screen 3 of this application embodiment uses the LED display driving circuit 1 of the above embodiment for driving display, it can simultaneously complete the common cathode energy-saving scheme design and the common anode energy-saving scheme design through a single printed circuit board layout design.

[0039] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An LED display driving circuit, applied in an LED display screen, the LED display screen comprising an array of multiple pixels, each pixel comprising a red LED, a green LED, and a blue LED, characterized in that, The LED display driving circuit includes a power supply module, a horizontal output transistor module, and a driving module, wherein... The power module includes a first channel and a second channel. The power module is configured such that the first channel outputs the working voltage of the LED beads, and the second channel is grounded; or the second channel outputs the working voltage of the LED beads, and the first channel is grounded. The row output module includes at least one row output channel, one end of which is electrically connected to the first channel, and the other end of which is electrically connected to the first end of all the LED beads of the pixel. The driving module includes at least one column output channel, one end of which is electrically connected to the second channel, and the other end of which is electrically connected to the second end of all the LED beads of the pixel.

2. The LED display driving circuit according to claim 1, characterized in that, The power module further includes a power module, a grounding module, a first switching component, and a second switching component. The first channel is switched between the power module and the grounding module via the first switching component, and the second channel is switched between the power module and the grounding module via the second switching component.

3. The LED display driving circuit according to claim 2, characterized in that, The power module includes a first power supply unit that outputs a first operating voltage and a second power supply unit that outputs a second operating voltage.

4. The LED display driving circuit according to claim 3, characterized in that, The first channel includes a first sub-channel and a second sub-channel, and the first switching component includes a first switching switch and a second switching switch; The first sub-channel is switched between the first power supply unit and the grounding module via the first switching switch; The second sub-channel is connected to the second power supply unit and the grounding module via the second switching switch.

5. The LED display driving circuit according to claim 4, characterized in that, The second channel includes a third sub-channel and a fourth sub-channel, and the second switching component includes a third switching switch and a fourth switching switch; The third sub-channel is connected to the first power supply unit and the grounding module via the third switching switch; The fourth sub-channel is connected to the second power supply unit and the grounding module via the fourth switching switch.

6. The LED display driving circuit according to claim 4, characterized in that, The row output channel includes a first row transistor and a second row transistor; The first end of the first row transistor is electrically connected to the first sub-channel, and the second end of the first row transistor is electrically connected to the first end of the red LED bead of the pixel. The first end of the second row transistor is electrically connected to the second sub-channel, and the second end of the second row transistor is electrically connected to the first end of the green LED bead and the first end of the blue LED bead of the pixel, respectively.

7. The LED display driving circuit according to claim 6, characterized in that, Both the first and second row transistors are common anode row transistors, with the first end of the LED bead being the anode and the second end being the cathode; or, Both the first and second row transistors are common cathode row transistors, with the first end of the LED bead being the cathode and the second end being the anode.

8. The LED display driving circuit according to claim 5, characterized in that, The column output channel includes a first driver chip, a second driver chip, and a third driver chip; The first end of the first driver chip is electrically connected to the third sub-channel, and the second end of the first driver chip is electrically connected to the second end of the red LED bead of the pixel. The first end of the second driver chip is electrically connected to the fourth sub-channel, and the second end of the second driver chip is electrically connected to the second end of the green LED bead of the pixel. The first end of the third driving chip is electrically connected to the fourth sub-channel, and the second end of the third driving chip is electrically connected to the second end of the blue LED bead of the pixel.

9. The LED display driving circuit according to any one of claims 1-8, characterized in that, The LED display driving circuit also includes a signal transceiver, which is electrically connected to the signal enable terminal of the row control module and the signal enable terminal of the driving module.

10. An LED display screen, characterized in that, The display includes multiple pixels arranged in an array and an LED display driving circuit as described in any one of claims 1-9, wherein each pixel includes a red LED, a green LED, and a blue LED.

Images