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 row driving module, a first column driving module, a second column driving module, a third column driving module and a fourth column driving module. The row output channel of the row driving module is electrically connected with the first end of the LED light emitting chip of the pixel point in the same row. The first column output channel of the first column driving module is electrically connected with the second end of the red LED light emitting chip of the pixel point in the same column. The second column output channel of the second column driving module is electrically connected with the second end of the first green LED light emitting chip of the pixel point in the same column. The third column output channel of the third column driving module is electrically connected with the second end of the blue LED light emitting chip of the pixel point in the same column. The fourth column output channel of the fourth column driving module is electrically connected with the second end of the second green LED light emitting chip of the pixel point in the same column. The technical scheme can realize the variable pixel point spacing, so that the physical resolution of the LED display screen is variable, and the adjustment requirement of the related scene can be met.

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 related technologies, such as Figure 1 As shown, each pixel in an existing LED display screen is composed of three light-emitting chips: red (R), green (G), and blue (B). Therefore, the pixel spacing in an existing LED display screen is mainly the distance between the centers of the red, green, and blue light-emitting chips that make up two adjacent pixels (i.e., the distance between the centers of the red, green, and blue light-emitting chips that make up the adjacent pixels). Figure 1 (The length of S1). Thus, once the existing LED display screen is manufactured, because the positions of the red, green, and blue light-emitting chips that make up each pixel are fixed, the pixel spacing is also fixed. This results in a fixed physical resolution, which cannot meet the adjustment requirements of relevant scenarios. Utility Model Content

[0004] This application provides an LED display screen and its LED display driving circuit, aiming to improve the technical problem that the pixel pitch of existing LED displays is fixed, resulting in a fixed physical resolution that cannot meet the adjustment requirements of relevant scenarios.

[0005] Therefore, this application provides an LED display driving circuit for use in an LED display screen. The LED display screen includes a plurality of pixels arranged in an array. Each pixel includes a red LED light-emitting chip, a first green LED light-emitting chip, a blue LED light-emitting chip, and a second green LED light-emitting chip arranged in the same rectangular shape. The first green LED light-emitting chip and the corresponding second green LED light-emitting chip are diagonally distributed. The LED display driving circuit includes a row driving module, a first column driving module, a second column driving module, a third column driving module, and a fourth column driving module. The row driving module includes at least one row output channel, which is electrically connected to the first end of the LED light-emitting chip of the pixel in the same row. The first column driving module includes at least one first column output channel, which is electrically connected to the second end of the red LED light-emitting chip of the pixel in the same column; The second column driving module includes at least one second column output channel, which is electrically connected to the second end of the first green LED light-emitting chip of the pixel in the same column; The third column driving module includes at least one third column output channel, which is electrically connected to the second end of the blue LED light-emitting chip of the pixel in the same column; The fourth column driving module includes at least one fourth column output channel, which is electrically connected to the second end of the second green LED light-emitting chip of the pixel in the same column.

[0006] Optionally, in some embodiments of this application, the LED display driving circuit further includes a signal source module, which is electrically connected to the row driving module, the first column driving module, the second column driving module, the third column driving module, and the fourth column driving module, respectively. The fourth column driving module is configured to respond to switching on and off under the control of the mode switching electrical signal of the signal source module.

[0007] Optionally, in some embodiments of this application, the LED display driving circuit further includes a power supply module, which includes a first channel, a second channel, a third channel, and a fourth channel. The first channel and the second channel are electrically connected to the row driving module, the third channel is electrically connected to the first column driving module, and the fourth channel is electrically connected to the second column driving module, the third column driving module and the fourth column driving module. The fourth column driving module is also configured to switch the fourth column output channel to the fourth channel under the control of the mode switching electrical signal of the signal source module.

[0008] Optionally, in some embodiments of this application, the power module is configured such that when the first channel outputs a first operating voltage and the second channel outputs a second operating voltage, the third channel and the fourth channel are grounded; or when the third channel outputs a first operating voltage and the fourth channel outputs a second operating voltage, the first channel and the second channel are grounded.

[0009] Optionally, in some embodiments of this application, the power module includes a first power module that outputs the first operating voltage, a second power module that outputs the second operating voltage, and a grounding module; The first channel is switched between the first power module and the grounding module via a first switching switch; The second channel is connected to the second power module and the grounding module via a second switching switch; The third channel is connected to the first power module and the grounding module via a third switching switch; The fourth channel is connected to the second power module and the grounding module via a 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; One end of the first row transistor is electrically connected to the first channel, and the other end of the first row transistor is electrically connected to the first end of the red LED light-emitting chip of the pixel in the same row. One end of the second row transistor is electrically connected to the second channel, and the other end of the second row transistor is electrically connected to the first end of the first green LED light-emitting chip of the pixel in the same row, the first end of the blue LED light-emitting chip of the pixel in the same row, and the first end of the second green LED light-emitting chip of the pixel in the same row.

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

[0012] Optionally, in some embodiments of this application, the LED display driving circuit further includes a signal source module, which is electrically connected to the signal enable terminal of the row driving module, the signal enable terminal of the first column driving module, the signal enable terminal of the second column driving module, the signal enable terminal of the third column driving module, and the signal enable terminal of the fourth column driving module.

[0013] In addition, this application embodiment also provides an LED display screen, including the LED display driving circuit described above.

[0014] Optionally, in some embodiments of this application, a plurality of pixels are arranged in an array, each pixel comprising a red LED light-emitting chip, a first green LED light-emitting chip, a blue LED light-emitting chip and a second green LED light-emitting chip arranged in the same rectangular shape, wherein the first green LED light-emitting chip and the corresponding second green LED light-emitting chip are diagonally distributed; each pixel performs display operation under the drive of the LED display driving circuit.

[0015] The technical solution provided in this application, through the above-described structural configuration, allows the LED display screen to be configured with two variable operating modes. One mode is a conventional real-pixel mode, in which only the red LED chip, the first green LED chip, and the blue LED chip work at each pixel. In this mode, the pixel spacing is the distance between the centers of two adjacent pixels (i.e.,...). Figure 2 The length of S1). Another mode is the virtual pixel mode. In this mode, the red LED chip, the first green LED chip, the blue LED chip, and the second green LED chip of each pixel are all working. At this time, each second green LED chip can reuse the blue LED chip directly below it and the red LED chip of the adjacent pixel to its right to form a virtual pixel. The pixel spacing is the distance between the center of each pixel and the center of the adjacent virtual pixel (i.e., the distance between the two pixels). Figure 2 The length of S2 is generally about half the length of S1. Thus, the LED display screen of this application can achieve variable physical resolution by varying the pixel pitch, thereby meeting the adjustment needs of relevant scenarios. Simultaneously, in virtual pixel mode, the virtual pixels can share some LED light-emitting chips with other pixels to achieve display. Compared to the solid pixel structure design with the same pixel pitch, its power consumption is reduced, achieving energy saving. Therefore, this technical solution effectively improves the technical problem of existing LED displays having a fixed pixel pitch, resulting in a fixed physical resolution that cannot meet the adjustment needs of relevant scenarios. 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 pixel pitch of an existing LED display screen.

[0018] Figure 2 This is a schematic diagram of the pixel pitch of the LED display screen in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the LED display driving circuit in an embodiment of this application.

[0020] Figure 4 for Figure 3 The schematic diagram of the LED display driver circuit shown is as follows. Figure 1 .

[0021] Figure 5 for Figure 3 The schematic diagram of the LED display driver circuit shown is as follows. Figure 2 .

[0022] Figure 6 for Figure 3 The diagram shows the structure of the power supply module of the LED display driver circuit.

[0023] Figure 7 for Figure 3 The diagram shows a common-anode energy-saving scheme for the LED display driver circuit.

[0024] Figure 8 for Figure 7 The diagram shows the current flow direction of the common anode energy-saving scheme.

[0025] Figure 9 for Figure 3 The diagram shows a common-cathode energy-saving scheme for the LED display driver circuit.

[0026] Figure 10 for Figure 9 The diagram shows the current flow direction of the common cathode energy-saving scheme.

[0027] Figure 11 This is a schematic diagram of the structure of the LED display screen in the embodiments of this application.

[0028] Figure label: 1. LED display driver circuit; 10. Row driver module; 11. First row transistor; 12. Second row transistor; 20. First column driver module; 30. Second column driver module; 40. Third column driver module; 50. Fourth column driver module; 60. Power supply module; 61. First channel; 62. Second channel; 63. Third channel; 64. Fourth channel; 65. First power supply module; 66. Second power supply module; 67. Grounding module; 681. First switching switch; 682. Second switching switch; 683. Third switching switch; 684. Fourth switching switch; 70. Signal source module; 2. Pixel; 3. LED display screen. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In one embodiment, such as Figures 2 to 5 As shown, this application embodiment provides an LED display driving circuit 1, which includes a row driving module 10, a first column driving module 20, a second column driving module 30, a third column driving module 40, and a fourth column driving module 50. The row driving module 10 includes at least one row output channel (i.e., Figure 4 The channels H1 and H2 shown are electrically connected to the first terminal of the LED light-emitting chip of pixel 2 in the same row. The first column driving module 20 includes at least one first column output channel (i.e., Figure 4 The first column output channel (shown as channels L1, L2, L3) is electrically connected to the second terminal of the red LED light-emitting chip at pixel 2 in the same column. The second column driving module 30 includes at least one second column output channel (i.e., Figure 4 The second column output channel (M1, M2, M3) is electrically connected to the second terminal of the first green LED light-emitting chip at pixel 2 in the same column. The third column driving module 40 includes at least one third column output channel (i.e., Figure 4 The third column output channel (shown as channels N1, N2, N3) is electrically connected to the second end of the blue LED light-emitting chip of pixel 2 in the same column. The fourth column driving module 50 includes at least one fourth column output channel (i.e., Figure 4 The fourth column output channel (P1, P2, P3) is electrically connected to the second end of the second green LED light-emitting chip of pixel 2 in the same column.

[0033] 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 light-emitting chip (i.e., Figure 2 The first green LED light-emitting chip (i.e., the light-emitting chip R) Figure 2 The light-emitting chip G1), blue LED light-emitting chip (i.e. Figure 2 The first green LED chip (B) and the second green LED chip (i.e. Figure 2 The first green LED and the corresponding second green LED are diagonally distributed. Therefore, the above-mentioned electrical connection between the row output channel and the first end of the LED chip of the same row of pixel 2 specifically means that the row output channel is electrically connected to the first end of the red LED chip, the first green LED chip, the first blue LED chip, and the first end of the second green LED chip in the corresponding row of pixel 2. Generally, the row driving module 10 can have multiple row output channels, and one row output channel corresponds to the driving display of one row of pixel 2 on the LED display screen.

[0034] Generally speaking, the row driving module 10, the first column driving module 20, the second column driving module 30, the third column driving module 40 and the fourth column driving module 50 in the embodiments of this application are basically the same as the row driving module 10 and column driving module (i.e. constant current driving module) of the conventional LED display driving circuit 1. The only difference is that the fourth column driving module 50 can switch between different working modes. That is, in the conventional real pixel mode, the fourth column driving module 50 does not work, and only in the virtual pixel mode does the fourth column driving module 50 work.

[0035] Thus, the LED display driving circuit 1 in this embodiment, through the above-described structural configuration, allows the LED display screen using this LED display driving circuit 1 to be configured with two variable operating modes. One mode is a conventional real-pixel mode, in which only the red LED light-emitting chip, the first green LED light-emitting chip, and the blue LED light-emitting chip operate at each pixel 2. In this mode, the pixel spacing is the distance between the centers of two adjacent pixels 2 (i.e.,...). Figure 2 The length of S1). Another mode is the virtual pixel mode. In this mode, the red LED chip, the first green LED chip, the blue LED chip, and the second green LED chip of each pixel 2 are all working. At this time, each second green LED chip can reuse the blue LED chip directly below it and the red LED chip of the adjacent pixel 2 to the right to form a virtual pixel 2. The spacing between the pixels 2 is the distance between the center of each pixel 2 and the center of the adjacent virtual pixel 2 (i.e., the distance between the center of each pixel 2 and the center of the adjacent virtual pixel 2). Figure 2The length of S2 is generally about half the length of S1. Thus, the LED display screen of this application can achieve variable physical resolution by making the pixel pitch 2 variable, so as to meet the adjustment needs of relevant scenarios. At the same time, in the virtual pixel mode, its virtual pixel 2 can achieve display by sharing part of the LED light-emitting chip with other pixel 2. Compared with the real pixel structure design with the same pixel pitch, its power consumption will be reduced, thus achieving the effect of energy saving.

[0036] In some examples, such as Figure 3 As shown, the LED display driving circuit 1 also includes a signal source module 70, which is electrically connected to the row driving module 10, the first column driving module 20, the second column driving module 30, the third column driving module 40, and the fourth column driving module 50. The fourth column driving module 50 is configured to respond to switching on and off under the control of the mode switching electrical signal of the signal source module 70. Thus, through the above structural configuration, the fourth column driving module 50 can respond to different switching on and off in different operating modes by controlling the mode switching electrical signal of the signal source module 70. That is, when the mode switching electrical signal of the signal source module 70 switches to the conventional real pixel mode, the fourth column driving module 50 can disconnect the electrical connection between the corresponding second green LED light-emitting chips and the power supply module 60. At this time, the corresponding second green light-emitting chips do not receive current and do not operate. When the mode switching electrical signal of the signal source module 70 is switched to the virtual pixel mode, the fourth column driving module 50 can respond by connecting the electrical connection between each corresponding second green LED light-emitting chip and the power supply module 60. At this time, each corresponding second green light-emitting chip is energized and can perform the corresponding display work.

[0037] It is understood that the signal source module 70 in this example can specifically be a receiving card, used to electrically connect to a host computer or a transmitting card, and to switch the output signal mode according to the instructions of the host computer or the transmitting card. Furthermore, The signal source module 70 can also receive display data signals, so that the entire LED display driving circuit 1 can drive the corresponding pixel 2 to perform corresponding display work through the row driving module 10 and the constant current IC module (i.e., the first column driving module 20, the second column driving module 30, the third column driving module 40 and the fourth column driving module 50) under the control of the display data signals received by the signal source module 70.

[0038] In some examples, such as Figure 3As shown, the LED display driving circuit 1 also includes a power supply module 60, which includes a first channel 61, a second channel 62, a third channel 63, and a fourth channel 64. The first channel 61 and the second channel 62 are electrically connected to the row driving module 10, the third channel 63 is electrically connected to the first column driving module 20, and the fourth channel 64 is electrically connected to the second column driving module 30, the third column driving module 40, and the fourth column driving module 50, respectively. The fourth column driving module 50 is also configured to switch the fourth column output channel to the fourth channel 64 under the control of the mode switching electrical signal of the signal source module 70. Thus, since the operating voltage of the red LED chip is different from that of the green and blue LED chips, the above-mentioned structural arrangement allows the first current loop formed by the first channel 61 and the third channel 63 to drive only the red LED chip, while the second current loop formed by the second channel 62 and the fourth channel 64 can drive the first green LED chip, the blue LED chip, and the second green LED chip respectively. In this way, a more energy-efficient dual-voltage drive design can be achieved by applying a first operating voltage to the first current loop and a second operating voltage to the second current loop.

[0039] It should be noted that, in this example, the fourth column driver module 50 is also configured to switch the electrical connection between the fourth column output channel and the fourth channel 64 under the control of the mode switching electrical signal of the signal source module 70. Specifically, when the mode switching electrical signal of the signal source module 70 switches to the normal real pixel mode, the fourth column driver module 50 can respond by disconnecting the electrical connection between the fourth column output channel and the fourth channel 64. Conversely, when the mode switching electrical signal of the signal source module 70 switches to the virtual pixel mode, the fourth column driver module 50 can respond by connecting the electrical connection between the fourth column output channel and the fourth channel 64.

[0040] In some examples, such as Figure 3 , Figures 6 to 10As shown, the power supply module 60 is configured such that when the first channel 61 outputs the first operating voltage and the second channel 62 outputs the second operating voltage, the third channel 63 and the fourth channel 64 are grounded; or when the third channel 63 outputs the first operating voltage and the fourth channel 64 outputs the second operating voltage, the first channel 61 and the second channel 62 are grounded. Thus, through the above structural configuration, the LED display driver circuit 1 can achieve common anode energy-saving layout and common cathode energy-saving layout by changing the voltage output states of the first channel 61 and the second channel 62, selecting different row driver modules 10 and different constant current IC modules (i.e., the first column driver module 20, the second column driver module 30, the third column driver module 40, and the fourth column driver module 50), and adjusting the installation direction of each LED light-emitting chip (i.e., the red LED light-emitting chip, the first green LED light-emitting chip, the blue LED light-emitting chip, and the second green LED light-emitting chip). That is, the technical solution of this application 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.

[0041] In some examples, such as Figure 6 As shown, the power module 60 includes a first power module 65 that outputs a first operating voltage, a second power module 66 that outputs a second operating voltage, and a grounding module 67. A first channel 61 is switched between the first power module 65 and the grounding module 67 via a first switch 681. A second channel 62 is switched between the second power module 66 and the grounding module 67 via a second switch 682. A third channel 63 is switched between the first power module 65 and the grounding module 67 via a third switch 683. A fourth channel 64 is switched between the second power module 66 and the grounding module 67 via a fourth switch 684. Thus, with this structural arrangement, when the first channel 61 is switched to be connected to the first power module 65 via the first switch 681, it can output the first operating voltage; and when the first channel 61 is switched to be connected to the grounding module 67 via the first switch 681, it can be grounded. Similarly, when the second channel 62 is switched to connect with the second power module 66 via the second switch 682, it can output a second operating voltage; when the second channel 62 is switched to connect with the grounding module 67 via the second switch 682, it can be grounded. When the third channel 63 is switched to connect with the first power module 65 via the third switch 683, it can output a first operating voltage; when the third channel 63 is switched to connect with the grounding module 67 via the third switch 683, it can be grounded. When the fourth channel 64 is switched to connect with the second power module 66 via the fourth switch 684, it can output a second operating voltage; when the fourth channel 64 is switched to connect with the grounding module 67 via the fourth switch 684, it can be grounded.

[0042] It should be noted that the first operating voltage in this example can specifically be 2.8V, which can be used as the driving voltage for the red LED chip. The second operating voltage in this example can specifically be 3.8V, which can be used as the driving voltage for the first green LED chip, the blue LED chip, and the second green LED chip.

[0043] In some examples, such as Figure 7 and Figure 9 As shown, the horizontal output channel includes a first horizontal output transistor 11 and a second horizontal output transistor 12. One end of the first horizontal output transistor 11 is electrically connected to the first channel 61, and the other end of the first horizontal output transistor 11 is electrically connected to the first end of the red LED light-emitting chip of pixel 2 in the same row. One end of the second horizontal output transistor 12 is electrically connected to the second channel 62, and the other end of the second horizontal output transistor 12 is electrically connected to the first end of the first green LED light-emitting chip, the first end of the blue LED light-emitting chip, and the first end of the second green LED light-emitting chip of pixel 2 in the same row. Thus, with the above structural configuration, the horizontal output channel of this example can better cooperate with the power supply module to form a dual-voltage drive scheme, better adapting to the different voltage drive requirements of different colored LED light-emitting chips.

[0044] In some examples, when the LED display driver circuit 1 in the previous example is formed Figure 7 When the dual-voltage common-anode energy-saving layout is shown, its first channel 61 outputs the first working voltage, the second channel 62 outputs the second working voltage, and when the third channel 63 and the fourth channel 64 are grounded, their first horizontal output transistor 11 and second horizontal output transistor 12 are both common-anode horizontal output transistors (i.e., ...). Figure 8 (As shown in the PMOS transistor diagram), at this time, the first end of the LED chip is the anode, and the second end of the LED chip is the cathode. The current flow direction of the entire driving circuit is as follows. Figure 8 As indicated by the arrow in the diagram. Similarly, when the LED display driver circuit 1 in the previous example is formed... Figure 9 In the dual-voltage common-cathode energy-saving layout shown, the third channel 63 outputs the first operating voltage, and the fourth channel 64 outputs the second operating voltage. When the first channel 61 and the second channel 62 are grounded, their first horizontal output transistor 11 and second horizontal output transistor 12 are both common-cathode horizontal output transistors (i.e., Figure 10 (As shown in the NMOS transistor diagram), in this case, the first end of the LED chip is the cathode, and the second end of the LED chip is the anode. The current flow direction of the entire driving circuit is as follows. Figure 10 As shown by the arrow in the image.

[0045] In one embodiment, such as Figure 11As shown, this application embodiment also provides an LED display screen 3, which includes the LED display driving circuit 1 in the above embodiment. Thus, 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 achieve variable physical resolution of the LED display screen by realizing variable pixel spacing 2, thereby meeting the adjustment needs of relevant scenarios. Simultaneously, in virtual pixel mode, its virtual pixels 2 can achieve display by sharing part of the LED light-emitting chip with other pixels 2. Compared with the solid pixel structure design with the same pixel spacing, its power consumption is reduced, thus achieving energy saving.

[0046] In some examples, the LED display screen 3 further includes an array of multiple pixels 2, each pixel 2 comprising a red LED light-emitting chip, a first green LED light-emitting chip, a blue LED light-emitting chip, and a second green LED light-emitting chip arranged in the same rectangular pattern, with the first green LED light-emitting chips diagonally distributed with their corresponding counterparts. Each pixel 2 operates under the drive of the LED display driving circuit 1. It is understood that the connection relationship between the LED display driving circuit 1 and each pixel 220 in this embodiment can be specifically referred to the preceding description, and will not be repeated here.

[0047] 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 driver circuit, used in an LED display screen, characterized in that, The LED display screen includes multiple pixels arranged in an array. Each pixel includes a red LED light-emitting chip, a first green LED light-emitting chip, a blue LED light-emitting chip, and a second green LED light-emitting chip with the same rectangular distribution. The first green LED light-emitting chip and the corresponding second green LED light-emitting chip are diagonally distributed. The LED display driving circuit includes a row driving module, a first column driving module, a second column driving module, a third column driving module, and a fourth column driving module. The row driving module includes at least one row output channel, which is electrically connected to the first end of the LED light-emitting chip of the pixel in the same row. The first column driving module includes at least one first column output channel, which is electrically connected to the second end of the red LED light-emitting chip of the pixel in the same column; The second column driving module includes at least one second column output channel, which is electrically connected to the second end of the first green LED light-emitting chip of the pixel in the same column; The third column driving module includes at least one third column output channel, which is electrically connected to the second end of the blue LED light-emitting chip of the pixel in the same column; The fourth column driving module includes at least one fourth column output channel, which is electrically connected to the second end of the second green LED light-emitting chip of the pixel in the same column.

2. The LED display driving circuit according to claim 1, characterized in that, The LED display driving circuit further includes a signal source module, which is electrically connected to the row driving module, the first column driving module, the second column driving module, the third column driving module, and the fourth column driving module. The fourth column driving module is configured to respond to switching on and off under the control of the mode switching electrical signal of the signal source module.

3. The LED display driving circuit according to claim 2, characterized in that, The LED display driving circuit also includes a power supply module, which includes a first channel, a second channel, a third channel, and a fourth channel. The first channel and the second channel are electrically connected to the row driving module, the third channel is electrically connected to the first column driving module, and the fourth channel is electrically connected to the second column driving module, the third column driving module and the fourth column driving module. The fourth column driving module is also configured to switch the fourth column output channel to the fourth channel under the control of the mode switching electrical signal of the signal source module.

4. The LED display driving circuit according to claim 3, characterized in that, The power module is configured such that when the first channel outputs a first operating voltage and the second channel outputs a second operating voltage, the third channel and the fourth channel are grounded; or when the third channel outputs a first operating voltage and the fourth channel outputs a second operating voltage, the first channel and the second channel are grounded.

5. The LED display driving circuit according to claim 4, characterized in that, The power module includes a first power module that outputs the first operating voltage, a second power module that outputs the second operating voltage, and a grounding module. The first channel is switched between the first power module and the grounding module via a first switching switch; The second channel is switched between the second power module and the grounding module via a second switching switch; The third channel is connected to the first power module and the grounding module via a third switching switch; The fourth channel is connected to the second power module and the grounding module via a fourth switching switch.

6. The LED display driving circuit according to claim 3, characterized in that, The row output channel includes a first row transistor and a second row transistor; One end of the first row transistor is electrically connected to the first channel, and the other end of the first row transistor is electrically connected to the first end of the red LED light-emitting chip of the pixel in the same row. One end of the second row transistor is electrically connected to the second channel, and the other end of the second row transistor is electrically connected to the first end of the first green LED light-emitting chip of the pixel in the same row, the first end of the blue LED light-emitting chip of the pixel in the same row, and the first end of the second green LED light-emitting chip of the pixel in the same row.

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

8. The LED display driving circuit according to claim 6, characterized in that, Both the first and second row tubes are common cathode row tubes, with the first end being the cathode and the second end being the anode.

9. An LED display screen, characterized in that, Includes the LED display driving circuit as described in any one of claims 1-8.

10. The LED display screen according to claim 9, characterized in that, It also includes multiple pixels arranged in an array, each pixel comprising a red LED light-emitting chip, a first green LED light-emitting chip, a blue LED light-emitting chip and a second green LED light-emitting chip arranged in the same rectangular shape, with the first green LED light-emitting chip and the corresponding second green LED light-emitting chip being diagonally distributed; each pixel performs display operation under the drive of the LED display driving circuit.

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