LED display device and LED display system

Abstract

The utility model relates to an LED display device and an LED display system. The LED display device comprises a plurality of pixel units and a plurality of driving circuits, wherein the pixel units and the driving circuits are arranged in an array mode. The pixel unit comprises a plurality of types of LEDs; all types of LEDs in each row are connected to the time-sharing gating circuit; the plurality of types of LEDs in the same pixel unit are connected to at least two driving circuits, and the same type of LEDs in adjacent columns of pixel units are connected to different driving circuits; based on this, each driving circuit can reliably drive a plurality of types of LEDs, so that the voltage drop generated by driving different types of LEDs can be uniformly distributed to all driving circuits, the problem of low reliability of the LED display device caused by the fact that part of driving circuits need to bear more voltage drop under the condition of unified power supply of a plurality of types of LEDs is avoided, and the reliability of the LED display device is improved. The damage risk of the driving circuit is effectively reduced, and the reliability of the LED display device is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an LED display device and an LED display system. Background Art

[0002] At present, LED display screens usually use LED as the basic pixel unit, which has the characteristics of high brightness, wide viewing angle, rich colors, etc. Therefore, they are widely used in various fields such as industry, transportation, commercial advertising, information release, sports competitions, etc. LED display screens usually include LED arrays, row drive modules and multiple drive circuits.

[0003] In the prior art, when driving an LED display screen, each driving circuit can usually only be used to drive the same type of LED, such as one of a red LED, a green LED, and a blue LED. Since the red LED, the green LED, and the blue LED have different conduction voltage drops, wherein the conduction voltage drop of the red LED is about 2V to 3V, and the conduction voltage drop of the green LED and the blue LED is about 3V to 4V, in order to ensure that the three types of LEDs can work normally, and considering the voltage drop inside the driving circuit, the existing LED display screen usually uses a fixed power supply such as 5V for unified power supply; however, in actual applications, the driving circuit used to drive the red LED itself needs to withstand an excessive voltage drop, resulting in excessive internal power consumption of the driving circuit, reduced service life, and easy damage to the driving circuit, which seriously affects the reliability of the LED display screen, that is, the reliability of the LED display screen in the prior art is low.

[0004] With regard to the problem of low reliability of LED display screens in the prior art, no effective solution has been proposed yet. Utility Model Content

[0005] Based on this, it is necessary to provide an LED display device and an LED display system to address the above technical problems.

[0006] In a first aspect, the present application provides an LED display device, comprising a plurality of pixel units arranged in an array and a plurality of driving circuits; the pixel units include a plurality of types of LEDs;

[0007] All types of LEDs in each row are connected to a time-sharing gating circuit;

[0008] Multiple types of LEDs in the same pixel unit are connected to at least two driving circuits, and the same type of LEDs in the pixel units in adjacent columns are connected to different driving circuits.

[0009] In one embodiment, the type of LEDs in each column of the plurality of pixel units arranged in an array is the same;

[0010] In a row of the pixel units, the LEDs in the same row are connected in series to the same driving circuit;

[0011] In a column of the pixel units, different columns of LEDs are connected to at least two driving circuits.

[0012] In one embodiment, the pixel unit includes a first type LED, a second type LED, and a third type LED.

[0013] In one embodiment, the conduction voltage drop of the first type LED is smaller than the conduction voltage drop of the second type LED;

[0014] The forward voltage drop of the first type LED is smaller than the forward voltage drop of the third type LED.

[0015] In one embodiment, the first type of LED includes a red LED;

[0016] The second type of LED includes a green LED;

[0017] The third type of LEDs includes blue LEDs.

[0018] In one embodiment, the plurality of driving circuits include a first driving circuit and a second driving circuit;

[0019] The first driving circuit includes a plurality of driving ports;

[0020] The second driving circuit includes a plurality of driving ports.

[0021] In one embodiment, the first type LED of the pixel unit in the 2m+1th column is connected to the first driving circuit, and the second type LED and the third type LED of the pixel unit in the 2m+2th column are connected to the first driving circuit;

[0022] The second type LED and the third type LED of the pixel unit in the 2m+1th column are connected to the second driving circuit, and the first type LED of the pixel unit in the 2m+2th column is connected to the second driving circuit.

[0023] In one embodiment, the plurality of driving circuits include a first driving circuit, a second driving circuit, and a third driving circuit;

[0024] The first driving circuit includes a plurality of driving ports;

[0025] The second driving circuit includes a plurality of driving ports;

[0026] The third driving circuit includes a plurality of driving ports.

[0027] In one embodiment, the first type LED of the pixel unit in the 3m+1th column is connected to the first driving circuit, the second type LED of the pixel unit in the 3m+2th column is connected to the first driving circuit, and the third type LED of the pixel unit in the 3m+3th column is connected to the first driving circuit;

[0028] The second type LEDs of the pixel units in the 3m+1th column are connected to the second driving circuit, the third type LEDs of the pixel units in the 3m+2th column are connected to the second driving circuit, and the first type LEDs of the pixel units in the 3m+3th column are connected to the second driving circuit;

[0029] The third type LEDs of the 3m+1th column of pixel units are connected to the third driving circuit, the first type LEDs of the 3m+2th column of pixel units are connected to the third driving circuit, and the second type LEDs of the 3m+3th column of pixel units are connected to the third driving circuit.

[0030] In a second aspect, the present application further provides an LED display system, comprising: a plurality of LED display devices as described in any one of the embodiments of the first aspect above;

[0031] The LED display system also includes a control module; the control module is connected to the time-sharing gating circuit.

[0032] The above-mentioned LED display device and LED display system, the LED display device includes a plurality of pixel units and a plurality of driving circuits arranged in an array; the pixel units include a plurality of types of LEDs; all types of LEDs in each row are connected to a time-sharing gating circuit; the plurality of types of LEDs in the same pixel unit are connected to at least two driving circuits, and the same type of LEDs in adjacent columns of pixel units are connected to different driving circuits; based on this, each driving circuit can reliably drive a plurality of types of LEDs, so as to evenly distribute the voltage drop generated by driving different types of LEDs to all driving circuits, thereby avoiding the problem of low reliability of the LED display device due to the need for some driving circuits to bear more voltage drop when a plurality of types of LEDs are supplied with power in a unified manner, effectively reducing the risk of damage to the driving circuit and improving the reliability of the LED display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of a plurality of pixel units arranged in an array in one embodiment;

[0035] Figure 2 is a schematic diagram of an LED display device in an embodiment;

[0036] Figure 3 is a schematic diagram of an LED display device in another embodiment;

[0037] Figure 4 FIG. 4 is a schematic diagram of an LED display device in another embodiment.

[0038] Description of reference numerals:

[0039] 1. Pixel unit; 2. Pixel column; 3. Pixel row. DETAILED DESCRIPTION

[0040] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0043] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0044] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0045] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0046] In one embodiment, an LED display device includes a plurality of pixel units arranged in an array and a plurality of driving circuits; the pixel units include a plurality of types of LEDs;

[0047] All types of LEDs in each row are connected to a time-sharing gating circuit;

[0048] Multiple types of LEDs in the same pixel unit are connected to at least two driving circuits, and the same type of LEDs in adjacent columns of pixel units are connected to different driving circuits.

[0049] Among them, the multiple pixel units arranged in the array refer to multiple pixel units arranged in rows and columns; the time-sharing gating circuit includes multiple gating ports; the multiple gating ports are sequentially connected to all types of LEDs in each row of the multiple pixel units arranged in the array, and are used to gating all types of LEDs in the corresponding rows; it should be noted that the time-sharing gating circuit can be a power supply circuit or a grounding circuit, which needs to be set according to the driving mode of the LED display device, and is not specifically limited here; among them, the driving mode of the LED display device can be a common anode driving mode or a common cathode driving mode, which needs to be set according to actual display requirements, and is not specifically limited here; Example If the LED display device adopts a common anode driving mode, the time-sharing gating circuit is a power supply circuit, which is used to provide a power supply voltage to multiple pixel units arranged in the array in a time-sharing manner; if the LED display device adopts a common cathode driving mode, the time-sharing gating circuit is a grounding circuit, which is used to connect the multiple pixel units arranged in the array to the ground in a time-sharing manner; wherein the power supply circuit can be but is not limited to an external power supply chip or an external power supply device, which is not specifically limited here; the driving circuit includes multiple constant current source circuits, which are used to realize the on and off control and brightness control of the LED; it should be noted that the constant current source circuit in the embodiment of the present application can adopt the constant current source circuit in the prior art, which is not repeated here.

[0050] For example, Figure 1For example, assume that a plurality of pixel units 1 are arranged in sequence in the arrangement of M rows and N columns to obtain M×N pixel units 1 arranged in an array; and assume that each pixel unit 1 includes three types of LEDs, namely, red LED, green LED and blue LED, and the LED types on the same column in all pixel units 1 are the same; M pixel units 1 on the same column constitute a pixel column 2; N pixel units 1 on the same row constitute a pixel row 3. Further, taking the common anode driving mode as an example, at this time, the time-sharing gating circuit is a power supply circuit, and the anodes of all LEDs in each pixel row 3 are connected in series and respectively connected to the gating ports corresponding to the power supply circuit, and the power supply circuit provides a power supply voltage to the anodes of all LEDs in the corresponding pixel row 3; in each pixel column 2, the cathodes of each column of LEDs, i.e., the same type of LEDs, are connected in series, and three columns of LEDs, i.e., three types of LEDs, are connected to at least two drive circuits, and it is ensured that the LEDs on the same column, i.e., the same type of LEDs in adjacent pixel columns 3 are connected to different drive circuits; for example, all red LEDs in the first pixel column are connected to the first drive circuit, and all green LEDs and all blue LEDs are connected to the second drive circuit. driving circuit; connecting all red LEDs in the second pixel column to the second driving circuit, and connecting all green LEDs and all blue LEDs to the first driving circuit; connecting all red LEDs in the third pixel column to the first driving circuit, and connecting all green LEDs and all blue LEDs to the second driving circuit, and so on; wherein the first pixel column and the second pixel column are adjacent pixel columns, and the second pixel column and the third pixel column are adjacent pixel columns; wherein the conduction voltage drop range of the red LED is 2V to 3V, and the conduction voltage drop range of the green LED and the blue LED is 3V to 4V; based on this, it can be ensured that each driving circuit can cross-drive different types of LEDs, laying a foundation for reducing the risk of damage to the driving circuit.

[0051] In the present embodiment, a plurality of pixel units are arranged in an array manner, and a plurality of types of LEDs in the same pixel unit are connected to different driving circuits, and it is ensured that the same type of LEDs in adjacent columns of pixel units are also connected to different driving circuits, thereby ensuring that each driving circuit can reliably drive a plurality of types of LEDs respectively. Based on this, the voltage drop generated by driving different types of LEDs can be evenly distributed to all driving circuits, thereby avoiding the problem of excessive power consumption and reduced service life of some driving circuits due to the need to bear more voltage drops, thereby effectively reducing the risk of damage to the LED display device, and thereby improving the reliability of the LED display device.

[0052] In one embodiment, see Figure 1 , the type of each column of LEDs in the plurality of pixel units 1 arranged in the array is the same;

[0053] In a column of pixel units 1, the same column of LEDs are connected in series to the same driving circuit;

[0054] In a column of pixel units 1 , different columns of LEDs are connected to at least two driving circuits.

[0055] Among them, the same column of LEDs is connected in series, which means that the anodes or cathodes of all LEDs in the same column are connected in series; for example, if the LED display device adopts a common anode driving mode, the time-sharing gating circuit is a power supply circuit, and in a column of pixel units 1, the cathodes of the same column of LEDs are connected in series to the same driving circuit; in a row of pixel units 1, the anodes of the same row of LEDs are connected in series to the power supply circuit; if the LED display device adopts a common cathode driving mode, the time-sharing gating circuit is a grounding circuit, and in a column of pixel units 1, the anodes of the same column of LEDs are connected in series to the same driving circuit; in a row of pixel units 1, the cathodes of the same row of LEDs are connected in series to the grounding circuit.

[0056] For example, it is assumed that each column of pixel units includes three types of LEDs, namely three columns of LEDs, namely red LEDs, green LEDs and blue LEDs; in the first column of pixel units 1, the column corresponding to the red LEDs is recorded as Rc1, the column corresponding to the green LEDs is recorded as Gc1, and the column corresponding to the blue LEDs is recorded as Bc1; in the second column of pixel units 1, the column corresponding to the red LEDs is recorded as Rc2, the column corresponding to the green LEDs is recorded as Gc2, and the column corresponding to the blue LEDs is recorded as Bc2, and so on; taking the common anode driving method as an example, in the Rc1 column, the cathodes of all red LEDs are connected in series to the same driving circuit; in the Gc1 column, the cathodes of all green LEDs are connected in series to the same driving circuit; in the Bc1 column, the cathodes of all blue LEDs are connected in series to the same driving circuit; and all red LEDs in the Rc1 column, all green LEDs in the Gc1 column, and all blue LEDs in the Bc1 column need to be connected to at least two driving circuits. driving circuit, and it is also necessary to ensure that the same type of LEDs in adjacent columns of pixel units 1 are connected to different driving circuits; for example, the cathodes of all red LEDs in column Rc1 are connected in series to the first driving circuit; the cathodes of all green LEDs in column Gc1 are connected in series to the second driving circuit; the cathodes of all blue LEDs in column Bc1 are connected in series to the second driving circuit; the cathodes of all red LEDs in column Rc2 are connected in series to the second driving circuit; the cathodes of all green LEDs in column Gc2 are connected in series to the first driving circuit; the cathodes of all blue LEDs in column Bc2 are connected in series to the first driving circuit; it should be noted that this embodiment only expresses one implementation method of the LED display device when the common anode driving mode is adopted, and the other implementation methods are the same in principle as the implementation methods of the above-mentioned embodiments, which will not be described in detail here; the LED display device when the common cathode driving mode is adopted is the same in principle as the implementation method of the above-mentioned embodiment, which will not be described in detail here.

[0057] In the present embodiment, the same column of LEDs in a column of pixel units 1 are connected in series to the same driving circuit, and different columns of LEDs are connected to at least two driving circuits. Based on this, it can be ensured that each driving circuit can reliably drive multiple types of LEDs respectively, and it can be ensured that the number of each type of LED connected to each driving circuit is more evenly distributed, further reducing the risk of damage to the LED display device.

[0058] In one embodiment, the pixel unit includes a first type LED, a second type LED, and a third type LED.

[0059] Preferably, the conduction voltage drop of the first type LED is smaller than the conduction voltage drop of the second type LED;

[0060] The forward voltage drop of the first type LED is smaller than the forward voltage drop of the third type LED.

[0061] Preferably, the first type of LED comprises a red LED;

[0062] The second type of LED includes a green LED;

[0063] The third type of LEDs includes blue LEDs.

[0064] Among them, the conduction voltage drop of the LED depends on the material and structure of the LED; therefore, the conduction voltage drop of different types of LEDs has certain differences; for example, the conduction voltage drop of a red light LED is about 2V to 3V, and the conduction voltage drop of a green light LED and a blue light LED is about 3V to 4V.

[0065] In a specific embodiment, see Figure 2 , the plurality of driving circuits include a first driving circuit and a second driving circuit;

[0066] The first driving circuit includes a plurality of driving ports;

[0067] The second driving circuit includes a plurality of driving ports.

[0068] Preferably, the first type LEDs of the pixel units in the 2m+1th column are connected to the first driving circuit, and the second type LEDs and the third type LEDs of the pixel units in the 2m+2th column are connected to the first driving circuit;

[0069] The second type LED and the third type LED of the pixel unit in the 2m+1th column are connected to the second driving circuit, and the first type LED of the pixel unit in the 2m+2th column is connected to the second driving circuit.

[0070] Each driving port is connected to a corresponding constant current source circuit to realize on / off control and brightness control of all LEDs on the corresponding column.

[0071] For example, it is assumed that the LED display device includes M columns of pixel units, and a first driving circuit and a second driving circuit arranged corresponding to the M columns of pixel units; and each pixel unit includes three types of LEDs, wherein the first type of LED is a red light LED, the second type of LED is a green light LED, and the third type of LED is a blue light LED; the multiple driving ports corresponding to the first driving circuit and the second driving circuit are respectively divided into two groups, that is, the first driving circuit and the second driving circuit both include a first port group and a second port group; wherein the first port group is used to drive the first type of LED, i.e., the red light LED, and the second port group is used to drive the second type of LED, i.e., the green light LED and the third type of LED, i.e., the blue light LED; wherein the number of driving ports in the second port group is twice the number of driving ports in the first port group.

[0072] Furthermore, the first type LED, i.e., the red light LED, of the pixel unit in the 2m+1th column is connected to the first driving circuit, the second type LED, i.e., the green light LED, and the third type LED, i.e., the blue light LED, of the pixel unit in the 2m+2th column are connected to the first driving circuit; the second type LED, i.e., the green light LED, and the third type LED, i.e., the blue light LED, of the pixel unit in the 2m+1th column are connected to the second driving circuit, and the first type LED, i.e., the red light LED, of the pixel unit in the 2m+2th column is connected to the second driving circuit, where m is an integer such as 0, 1, or 2.

[0073] Furthermore, Figure 2 For example, assuming that the LED display device adopts a common anode driving method, in the first column of pixel units, the column corresponding to the red LED is marked as Rc1, the column corresponding to the green LED is marked as Gc1, and the column corresponding to the blue LED is marked as Bc1; in the second column of pixel units, the column corresponding to the red LED is marked as Rc2, the column corresponding to the green LED is marked as Gc2, and the column corresponding to the blue LED is marked as Bc2, and so on for marking all columns of LEDs; the cathodes of all red LEDs in the Rc1 column are connected in series to the first drive circuit, the cathodes of all green LEDs in the Gc2 column are connected in series to the first drive circuit, and the cathodes of all blue LEDs in the Bc2 column are connected in series to the first drive circuit; The cathodes of all red LEDs are connected in series to the second drive circuit, the cathodes of all green LEDs in the Gc1 column are connected in series to the second drive circuit, and the cathodes of all blue LEDs in the Bc1 column are connected in series to the second drive circuit; the cathodes of all red LEDs in the Rc3 column are connected in series to the first drive circuit, the cathodes of all green LEDs in the Gc4 column are connected in series to the first drive circuit, and the cathodes of all blue LEDs in the Bc4 column are connected in series to the first drive circuit; the cathodes of all red LEDs in the Rc4 column are connected in series to the second drive circuit, the cathodes of all green LEDs in the Gc3 column are connected in series to the second drive circuit, and the cathodes of all blue LEDs in the Bc3 column are connected in series to the second drive circuit, and so on.

[0074] In the present embodiment, the various types of LEDs in all columns of pixel units are evenly distributed and connected to the first drive circuit and the second drive circuit according to the conduction voltage drops of the different types of LEDs, so that the quantity distribution of each type of LED connected to each drive circuit is more balanced. Based on this, when all types of LEDs are powered uniformly, the voltage drops generated by driving the different types of LEDs can be evenly distributed to all drive circuits, thereby avoiding the problem that some drive circuits need to bear more voltage drops, which affects the performance and service life of the drive circuits, thereby improving the reliability of the LED display device.

[0075] In a specific embodiment, see Figure 3 , the plurality of driving circuits include a first driving circuit, a second driving circuit and a third driving circuit;

[0076] The first driving circuit includes a plurality of driving ports;

[0077] The second driving circuit includes a plurality of driving ports;

[0078] The third driving circuit includes a plurality of driving ports.

[0079] Preferably, the first type LED of the pixel unit in the 3m+1th column is connected to the first driving circuit, the second type LED of the pixel unit in the 3m+2th column is connected to the first driving circuit, and the third type LED of the pixel unit in the 3m+3th column is connected to the first driving circuit;

[0080] The second type LEDs of the pixel units in the 3m+1th column are connected to the second driving circuit, the third type LEDs of the pixel units in the 3m+2th column are connected to the second driving circuit, and the first type LEDs of the pixel units in the 3m+3th column are connected to the second driving circuit;

[0081] The third type LEDs of the 3m+1th column of pixel units are connected to the third driving circuit, the first type LEDs of the 3m+2th column of pixel units are connected to the third driving circuit, and the second type LEDs of the 3m+3th column of pixel units are connected to the third driving circuit.

[0082] For example, it is assumed that the LED display device includes M columns of pixel units, and a first drive circuit, a second drive circuit and a third drive circuit are arranged corresponding to the M columns of pixel units; and each pixel unit includes three types of LEDs, wherein the first type of LED is a red light LED, the second type of LED is a green light LED, and the third type of LED is a blue light LED; the multiple drive ports corresponding to the first drive circuit, the second drive circuit and the third drive circuit are respectively divided into three groups, that is, the first drive circuit, the second drive circuit and the third drive circuit each include a first port group, a second port group and a third port group; wherein the first port group is used to drive the first type of LED, i.e., the red light LED, the second port group is used to drive the second type of LED, i.e., the green light LED, and the third port group is used to drive the third type of LED, i.e., the blue light LED; wherein the number of drive ports in the first port group, the second port group and the third port group is equal.

[0083] Further, the first type LED, i.e., the red light LED, of the 3m+1th column of pixel units is connected to the first drive circuit, the second type LED, i.e., the green light LED, of the 3m+2th column of pixel units is connected to the first drive circuit, and the third type LED, i.e., the blue light LED, of the 3m+3th column of pixel units is connected to the first drive circuit; the second type LED, i.e., the green light LED, of the 3m+1th column of pixel units is connected to the second drive circuit, the third type LED, i.e., the blue light LED, of the 3m+2th column of pixel units is connected to the second drive circuit, and the first type LED, i.e., the red light LED, of the 3m+3th column of pixel units is connected to the second drive circuit; the third type LED, i.e., the blue light LED, of the 3m+1th column of pixel units is connected to the third drive circuit, the first type LED, i.e., the red light LED, of the 3m+2th column of pixel units is connected to the third drive circuit, and the second type LED, i.e., the green light LED, of the 3m+3th column of pixel units is connected to the third drive circuit, wherein m is an integer such as 0, 1, or 2.

[0084] Furthermore, Figure 3For example, assuming that the LED display device adopts a common anode driving method, in the first column of pixel units, the column corresponding to the red LED is marked as Rc1, the column corresponding to the green LED is marked as Gc1, and the column corresponding to the blue LED is marked as Bc1; in the second column of pixel units, the column corresponding to the red LED is marked as Rc2, the column corresponding to the green LED is marked as Gc2, and the column corresponding to the blue LED is marked as Bc2, and so on for marking all columns of LEDs; the cathodes of all red LEDs in the Rc1 column are connected in series to the first driving circuit, and the cathodes of all green LEDs in the Gc2 column are connected in series to The cathodes of the first driving circuit and all blue LEDs in the Bc3 column are connected in series to the first driving circuit; the cathodes of all red LEDs in the Rc3 column are connected in series to the second driving circuit, the cathodes of all green LEDs in the Gc1 column are connected in series to the second driving circuit, and the cathodes of all blue LEDs in the Bc2 column are connected in series to the second driving circuit; the cathodes of all red LEDs in the Rc2 column are connected in series to the third driving circuit, the cathodes of all green LEDs in the Gc3 column are connected in series to the third driving circuit, and the cathodes of all blue LEDs in the Bc1 column are connected in series to the third driving circuit, and so on. It should be noted that, assuming that the LED display device adopts a common cathode driving method, such as Figure 4 As shown, at this time, the implementation method of the LED display device is the same as the above Figure 3 The implementation principles of the corresponding embodiments are the same and will not be repeated here.

[0085] In this embodiment, according to the conduction voltage drops of different types of LEDs, the various types of LEDs in all columns of pixel units are evenly distributed and connected to the first drive circuit, the second drive circuit and the third drive circuit, so that each drive circuit can cross-drive the first type LED, the second type LED and the third type LED in different columns of pixel units, thereby further improving the reliability of the LED display device.

[0086] The above-mentioned LED display device arranges multiple pixel units in an array manner, and connects multiple types of LEDs in the same pixel unit to different driving circuits, and ensures that the same type of LEDs in adjacent columns of pixel units 1 are also connected to different driving circuits. Based on this, it can be ensured that each driving circuit can reliably drive multiple types of LEDs respectively, and when all types of LEDs are powered uniformly, the voltage drop generated by driving different types of LEDs can be evenly distributed to all driving circuits, thereby avoiding the problem of excessive power consumption and reduced service life of some driving circuits due to the need to bear more voltage drops, effectively reducing the risk of damage to the driving circuit and improving the reliability of the LED display device.

[0087] In one embodiment, an LED display system comprises: a plurality of LED display devices in any of the above embodiments;

[0088] The LED display system also includes a control module; the control module is connected with the time-sharing gating circuit.

[0089] Among them, the control module is connected to the time-sharing gating circuit, which is used to generate a gating control signal and transmit the gating control signal to the time-sharing gating circuit; the time-sharing gating circuit adjusts the state of the corresponding gating port according to the gating control signal; for example, taking the common anode driving mode as an example, the time-sharing gating circuit is a power supply circuit, at this time, the power supply circuit receives the gating control signal output by the control module, and adjusts the state of the corresponding gating port according to the gating control signal, based on which the power supply control or power-off control of all types of LEDs in the corresponding rows of multiple pixel units arranged in the array is realized; similarly, when the LED display device adopts the common cathode driving mode, the implementation principle is the same as that in the above embodiment, which will not be repeated here. It should be noted that the specific structure of the control module needs to be set according to actual practical needs, and is not specifically limited here.

[0090] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0091] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An LED display device, characterized in that: It comprises a plurality of pixel units arranged in an array and a plurality of driving circuits; the pixel units comprise a plurality of types of LEDs; All types of LEDs in each row are connected to a time-sharing gating circuit; Multiple types of LEDs in the same pixel unit are connected to at least two driving circuits, and the same type of LEDs in the pixel units in adjacent columns are connected to different driving circuits.

2. The LED display device according to claim 1, characterized in that: The type of LEDs in each column of the plurality of pixel units arranged in an array is the same; In a row of the pixel units, the LEDs in the same row are connected in series to the same driving circuit; In a column of the pixel units, different columns of LEDs are connected to at least two driving circuits.

3. The LED display device according to claim 2, characterized in that: The pixel unit includes a first type LED, a second type LED, and a third type LED.

4. The LED display device according to claim 3, characterized in that: The conduction voltage drop of the first type LED is smaller than the conduction voltage drop of the second type LED; The forward voltage drop of the first type LED is smaller than the forward voltage drop of the third type LED.

5. The LED display device according to claim 4, characterized in that: The first type of LED includes a red LED; The second type of LED includes a green LED; The third type of LEDs includes blue LEDs.

6. The LED display device according to claim 3, characterized in that: The plurality of driving circuits include a first driving circuit and a second driving circuit; The first driving circuit includes a plurality of driving ports; The second driving circuit includes a plurality of driving ports.

7. The LED display device according to claim 6, characterized in that: The first type LED of the pixel unit in the 2m+1th column is connected to the first driving circuit, and the second type LED and the third type LED of the pixel unit in the 2m+2th column are connected to the first driving circuit; The second type LED and the third type LED of the pixel unit in the 2m+1th column are connected to the second driving circuit, and the first type LED of the pixel unit in the 2m+2th column is connected to the second driving circuit.

8. The LED display device according to claim 3, characterized in that: The plurality of driving circuits include a first driving circuit, a second driving circuit and a third driving circuit; The first driving circuit includes a plurality of driving ports; The second driving circuit includes a plurality of driving ports; The third driving circuit includes a plurality of driving ports.

9. The LED display device according to claim 8, characterized in that: The first type LED of the pixel unit in the 3m+1th column is connected to the first driving circuit, the second type LED of the pixel unit in the 3m+2th column is connected to the first driving circuit, and the third type LED of the pixel unit in the 3m+3th column is connected to the first driving circuit; The second type LED of the pixel unit in the 3m+1th column is connected to the second driving circuit, the third type LED of the pixel unit in the 3m+2th column is connected to the second driving circuit, and the first type LED of the pixel unit in the 3m+3th column is connected to the second driving circuit; The third type LEDs of the 3m+1th column of pixel units are connected to the third driving circuit, the first type LEDs of the 3m+2th column of pixel units are connected to the third driving circuit, and the second type LEDs of the 3m+3th column of pixel units are connected to the third driving circuit.

10. An LED display system, characterized in that: include: A plurality of LED display devices according to any one of claims 1 to 9; The LED display system also includes a control module; the control module is connected to the time-sharing gating circuit.

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