LED driving device, column driving chip and row driving chip

Abstract

The invention relates to an LED driving device, a column driving chip and a row driving chip, and the LED driving device is used for driving an LED array. The device comprises a main control unit, a column driving unit and at least one row driving unit, wherein the column driving unit and the row driving unit correspond to each LED array; the column driving unit corresponding to the LED array is used for controlling each row driving unit corresponding to the LED array; the main control unit is used for sending a main control signal to control the column driving unit; the column driving unit is used for receiving the main control signal, providing driving current for each column of LEDs in the LED array needing to be driven according to the main control signal, and generating and sending a row control signal to the row driving unit controlled by the column driving unit according to the main control signal; the row driving unit is used for receiving a row control signal and controlling corresponding row channels in the LED array to be opened or closed; according to the LED driving device, the design complexity can be reduced, and the design freedom degree and flexibility can be improved.

Description

Technical Field

[0001] The present application relates to the field of display driving, and in particular to an LED driving device, a column driving chip and a row driving chip. Background Art

[0002] The light emitting diode (LED) driver can be used to drive the LED array for display. The LED driver includes an LED display driver circuit, which includes a row driver circuit and a column driver circuit, wherein the row driver circuit is used to control the LED array to turn on row by row, and the column driver circuit is used to provide a constant current for the LED lamp beads in the LED array. The row driver circuit and the column driver circuit need to be controlled by a dedicated control chip. Therefore, when designing the LED driver system, it is necessary to consider the connection between the control chip and the row driver circuit and the column driver circuit respectively. At the same time, the control chip needs to send different control signals to control the row driver circuit and the column driver circuit respectively, which makes the design of the LED driver more complicated. Summary of the invention

[0003] In view of this, the present application proposes an LED driving device, which can reduce design complexity, improve design freedom, and save wiring.

[0004] According to one aspect of the present application, there is provided an LED driving device for driving at least one LED array; the device comprises: a main control unit, a column driving unit corresponding to each of the LED arrays, and at least one row driving unit; the column driving unit corresponding to each of the LED arrays is used to control each of the row driving units corresponding to the LED array; the main control unit is used to send a main control signal to control the column driving unit; the column driving unit is used to receive the main control signal and provide a driving current for each column of LEDs in the LED array that needs to be driven by the column driving unit according to the main control signal, and to generate and send a row control signal to the row driving unit controlled by the column driving unit according to the main control signal; the row driving unit is used to receive the row control signal and control the corresponding row channel in the LED array corresponding to the row driving unit to be turned on or off according to the row control signal.

[0005] In one possible implementation, the at least one LED array includes a first LED array, each of the first LED arrays corresponds to a first column driving unit and a plurality of first row driving units, and each of the first row driving units corresponding to each of the first LED arrays is respectively connected to the first column driving unit corresponding to the first LED array, and the first column driving unit is used to send the row control signal to each of the first row driving units controlled.

[0006] In a possible implementation, the row control signal includes a parallel data signal and an enable signal; each of the first row driver units includes a parallel data interface and an enable signal interface; wherein the enable signal is used to indicate a target row driver unit among the plurality of first row driver units; the parallel data signal is used to indicate a row channel that needs to be turned on among the row channels controlled by the target row driver unit; the parallel data interface is used to receive the parallel data signal; and the enable signal interface is used to receive the enable signal.

[0007] In a possible implementation, the row control signal includes a serial data signal and a clock signal; the at least one LED array includes a second LED array, each of the second LED arrays corresponds to a second column driver unit and a plurality of second row driver units, and the plurality of second row driver units corresponding to each of the second LED arrays are connected in sequence, the second column driver unit is used to send the serial data signal to the first second row driver unit among the plurality of second row driver units connected in sequence, and to send the clock signal to each of the second row driver units controlled; each of the second row driver units is used to transmit the received serial data signal to the next second row driver unit connected thereto; wherein the serial data signal is used to indicate the scan start time of the row channel controlled by each of the second row driver units, and the clock signal is used to indicate the start time of the row channels controlled by each of the second row driver units being sequentially turned on from the corresponding scan start time.

[0008] In a possible implementation, each of the second-row driver units includes a serial data input interface and a serial data output interface; among the plurality of second-row driver units connected in sequence, the serial data output interface of each of the second-row driver units is connected to the serial data input interface of the next second-row driver unit connected; each of the second-row driver units receives the serial data signal using the serial data input interface, and transmits the serial data signal to the serial data input interface of the next second-row driver unit connected using the serial data output interface.

[0009] In a possible implementation manner, each of the second row driving units further includes a clock signal interface; the clock signal interface is used to receive the clock signal.

[0010] In a possible implementation manner, the main control signal includes display data corresponding to the at least one LED array.

[0011] According to another aspect of the present application, a column driver chip is provided, comprising the column driver unit in the above-mentioned LED driver device.

[0012] According to another aspect of the present application, a row driving chip is provided, comprising the row driving unit in the above-mentioned LED driving device.

[0013] According to another aspect of the present application, a display device is provided, comprising the above-mentioned LED driving device and a display panel; the display panel comprises at least one LED array.

[0014] In a possible implementation, the display panel is any one of a light emitting diode display panel, a micro light emitting diode display panel, a mini light emitting diode display panel, a quantum dot light emitting diode display panel, and an organic light emitting diode display panel.

[0015] In the LED driving device of the present application, the main control unit only controls the column driving units corresponding to each LED array, and the column driving units corresponding to each LED array control the row driving units corresponding to the LED array. The hardware design is simpler. The main control unit only needs to communicate with the column driving units and does not need to communicate with the row driving units, which reduces the design complexity. The main control unit does not need to be connected to the row driving units, which can save wiring. In addition, the LED driving device of the present application can flexibly design the number of column driving units and row driving units, thereby improving the design freedom and can be suitable for driving LED arrays of different sizes and numbers, and has stronger applicability.

[0016] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 A schematic structural diagram of an LED driving device according to an embodiment of the present application is shown.

[0019] Figure 2 A schematic structural diagram of an LED driving device according to an embodiment of the present application is shown.

[0020] Figure 3 A schematic structural diagram of an LED driving device according to an embodiment of the present application is shown.

[0021] Figure 4 A schematic structural diagram of an LED driving device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0023] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0024] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0025] Figure 1 FIG. 1 is a schematic diagram showing a structure of an LED driving device according to an embodiment of the present application, wherein the device is used to drive at least one LED array, such as Figure 1 As shown, the device may include a main control unit, a column drive unit corresponding to each of the LED arrays, and at least one row drive unit; the column drive unit corresponding to each of the LED arrays is used to control each of the row drive units corresponding to the LED array; the main control unit is used to send a main control signal to control the column drive unit; the main control signal includes display data corresponding to the at least one LED array (i.e., image data or video data that needs to be displayed through the LED array); the column drive unit is used to receive the main control signal and provide a driving current for each column of LEDs in the LED array corresponding to the column drive unit (i.e., the column drive unit needs to drive) according to the main control signal, and generate and send a row control signal to the row drive unit controlled by the column drive unit according to the main control signal; the row drive unit is used to receive the row control signal and control the corresponding row channel in the LED array corresponding to the row drive unit to turn on or off according to the row control signal; one row channel corresponds to a row of LEDs in the LED array. Wherein, different LED arrays correspond to different column drive units and row drive units, and different row drive units control the opening or closing of different row channels in the LED arrays to which they correspond. Exemplarily, Figure 1The LED driving device shown is used to drive an LED array 1 and an LED array 2, wherein the LED array 1 corresponds to a column driving unit 1, a row driving unit 1-1 and a row driving unit 1-2, and the LED array 2 corresponds to a column driving unit 2, a row driving unit 2-1 and a row driving unit 2-2. The main control unit is used to send a main control signal to the column driving unit 1 and the column driving unit 2 to control the column driving unit 1 and the column driving unit 2; the column driving unit 1 is used to send a row control signal to the row driving unit 1-1 and the row driving unit 1-2 to control the row driving unit 1-1 and the row driving unit 1-2; the column driving unit 2 is used to send a row control signal to the row driving unit 2-1 and the row driving unit 2-2 to control the row driving unit 2-1 and the row driving unit 2-2.

[0026] It should be noted that those skilled in the art can design the number of LED arrays driven by the LED driving device and the number of row driving units corresponding to each LED array according to actual needs, and this application does not limit this.

[0027] Those skilled in the art can set which LED array each column driving unit controls according to actual needs, that is, each column driving unit is used to provide driving current for each column of LEDs in which LED array. Figure 1 As shown, the column driving unit 1 can be a LED array 1 in each column (ie Figure 1 Middle L1-1~L1-N 1 The column driving unit 2 can provide driving current for each column of LEDs in the LED array 2 (i.e. Figure 1 Middle L2-1~L2-N 2 The LEDs in the column) provide driving current; N 1 、N 2 The values ​​can be equal or unequal and can be set according to actual needs.

[0028] Those skilled in the art can set each row driving unit to control which row channels in the corresponding LED array are turned on and off according to actual needs. Figure 1 As shown, the row driving unit 1-1 and the row driving unit 1-2 correspond to the LED array 1, and the row driving unit 1-1 can control the rows R11-1 to R11-M in the LED array 1. 1 The row driver unit 1-2 can control the LED array 1 to open or close the row. 2 The row driving unit 2-1 and the row driving unit 2-2 correspond to the LED array 2, and the row driving unit 2-1 can control the LED array 2 R21-1 ~ R21-M 3The row driver unit 2-2 can control the LED array 2 to open or close the row. 4 Open or close the line; M 1 、M 2 、M 3 、M 4 The values ​​can be equal or unequal and can be set according to actual needs.

[0029] Exemplarily, if the row driving unit is used to control the opening and closing of M row channels, the row driving unit may include M row switches, and the M row switches are correspondingly connected to the M row channels (i.e., M rows of LEDs) controlled by the row driving unit, and each row switch is connected to a row of LEDs. When the row switch is turned on, the row channel corresponding to the row switch is turned on; when the row switch is turned off, the row channel corresponding to the row switch is turned off. After receiving the row control signal, the row driving unit can control the opening and closing of the M row switches according to the row control signal to control the opening and closing of the M row channels.

[0030] Exemplarily, the display data may include a grayscale value corresponding to each LED in the LED array. After the column driving unit receives the main control signal, the brightness of the LED can be determined according to the grayscale value corresponding to the LED driven by it in the display data, and the size and / or duration of the driving current flowing through the LED can be controlled, so that when the row channel corresponding to the LED is turned on, the LED can be displayed according to its brightness.

[0031] In the LED driving device of the embodiment of the present application, the main control unit only controls the column driving units corresponding to each LED array, and the column driving units corresponding to each LED array control the row driving units corresponding to the LED array. Compared with the traditional LED driving device, the hardware design of the LED driving device of the embodiment of the present application is simpler. The main control unit only needs to communicate with the column driving unit and does not need to communicate with the row driving unit, which reduces the design complexity. The main control unit does not need to be connected to the row driving unit, which can save wiring; and the LED driving device of the embodiment of the present application can flexibly design the number of column driving units and row driving units, thereby improving the design freedom and can be suitable for driving LED arrays of different sizes and numbers, and has stronger applicability.

[0032] It should be noted that the LED driving device of the embodiment of the present application can be used to drive a common cathode LED array (such as Figure 1 As shown), the anode of each LED in the LED array is connected to the column driving unit, and the cathode of the LED is connected to the row driving unit; the LED driving device of the embodiment of the present application can also be used to drive a common anode LED array. Figure 2 A schematic diagram of the structure of an LED driving device according to an embodiment of the present application is shown as follows: Figure 2As shown, the LED driving device is used to drive a common anode LED array, wherein the cathode of each LED in the LED array is connected to a column driving unit, and the anode of the LED is connected to a row driving unit.

[0033] In a possible implementation, if the device is used to drive multiple LED arrays, the column drive units corresponding to the LED arrays can be connected in sequence, and the main control unit can be connected to the column drive unit corresponding to the first LED array; the main control unit is used to send the main control signal to the column drive unit corresponding to the first LED array; each column drive unit is used to transmit the received main control signal to the next connected column drive unit. In this way, serial transmission of the column drive signal can be realized, thereby realizing the control of the column drive units corresponding to each LED array by the main control unit.

[0034] In a possible implementation, if the device is used to drive multiple LED arrays, the column drive units corresponding to each LED array can be connected to the main control unit respectively; the main control unit is used to send main control signals to the multiple column drive units respectively. In this way, parallel transmission of column drive signals can be achieved, thereby achieving control of the column drive units corresponding to each LED array by the main control unit.

[0035] It should be noted that those skilled in the art can design a transmission method of the main control signal according to actual needs, and the present application does not limit this, as long as each column driving unit can receive the main control signal.

[0036] In one possible implementation, the at least one LED array includes a first LED array, each of the first LED arrays corresponds to a first column driving unit and a plurality of first row driving units, and each of the first row driving units corresponding to each of the first LED arrays is respectively connected to the first column driving unit corresponding to the first LED array, and the first column driving unit is used to send the row control signal to each of the first row driving units controlled.

[0037] Exemplarily, the row control signal may include a parallel data signal and an enable signal; each first row driver unit may include a parallel data interface and an enable signal interface; wherein the enable signal is used to indicate a target row driver unit among the multiple first row driver units; the parallel data signal is used to indicate a row channel that needs to be turned on among the row channels controlled by the target row driver unit; the parallel data interface is used to receive the parallel data signal; and the enable signal interface is used to receive the enable signal.

[0038] When a LED array corresponds to multiple row driving units, the multiple row driving units can be connected in parallel, that is, each row driving unit is connected to the column driving unit corresponding to the LED array, and the column driving unit sends a row control signal to each row driving unit.

[0039] For example, Figure 3 A schematic diagram of the structure of an LED driving device according to an embodiment of the present application is shown as follows: Figure 3 As shown, the LED driving device is used to drive an LED array 1 and an LED array 2. The LED array 1 corresponds to a column driving unit 1, a row driving unit 1-1 and a row driving unit 1-2, and the LED array 2 corresponds to a column driving unit 2, a row driving unit 2-1 and a row driving unit 2-2. The row driving unit 1-1 and the row driving unit 1-2 are respectively connected to the column driving unit 1, and the row driving unit 2-1 and the row driving unit 2-2 are respectively connected to the column driving unit 2.

[0040] Assuming that each row driving unit can control 8 row channels, the row control signal may include parallel data signals ROW_A0, ROW_A1, ROW_A2 and an enable signal ROW_E0, and each row driving unit may include parallel data interfaces A0, A1, A2 and an enable signal interface E0N / E0; wherein the A0 interface is used to receive ROW_A0, the A1 interface is used to receive ROW_A1, the A2 interface is used to receive ROW_A2, and the E0N / E0 interface is used to receive ROW_E0.

[0041] ROW_E0 is a binary code, which is used to indicate which row driver unit is selected as the target row driver unit between the row driver unit 1-1 and the row driver unit 1-2. For example, the enable signal interface of the row driver unit 1-1 may be E0N, and the enable signal interface of the row driver unit 1-2 may be E0. When ROW_E0 is 0, it indicates that the row driver unit 1-1 is selected as the target row driver unit, and when ROW_E0 is 1, it indicates that the row driver unit 1-2 is selected as the target row driver unit.

[0042] ROW_A0, ROW_A1, and ROW_A2 each represent a binary code, which is used to indicate the row channel that needs to be enabled. The binary codes represented by ROW_A0, ROW_A1, and ROW_A2 can be decoded through the 3-8 decoding protocol, and after decoding, it can be determined which row channel among the 8 row channels needs to be enabled. For example, ROW_A0, ROW_A1, and ROW_A2 are 0, 0, and 0 respectively, which can indicate that the first row channel among the 8 row channels needs to be enabled; ROW_A0, ROW_A1, and ROW_A2 are 0, 0, and 1 respectively, which can indicate that the second row channel among the 8 row channels needs to be enabled; and so on, different binary codes can represent different row channels.

[0043] Taking the control of opening each row channel in the LED array 1 as an example, the column driver unit 1 sends parallel data signals ROW_A0, ROW_A1, ROW_A2 and enable signal ROW_E0 to the row driver unit 1-1 and the row driver unit 1-2 respectively. If the ROW_A0, ROW_A1, ROW_A2, and ROW_E0 received by the row driver unit are 0, 0, 0, and 0 respectively, it means that the first row channel of the 8 row channels controlled by the row driver unit 1-1 needs to be opened, and the row driver unit 1-1 will control the corresponding row channel to be opened; if the ROW_A0, ROW_A1, ROW_A2, and ROW_E0 received by the row driver unit are 0, 0, 0, and 1 respectively, it means that the first row channel of the 8 row channels controlled by the row driver unit 1-2 needs to be opened, and the row driver unit 1-2 will control the corresponding row channel to be opened. The column driver unit 1 can control each row channel in the LED array 1 to be opened in sequence by sending the corresponding row control signals in sequence, thereby realizing the function of row-by-row scanning.

[0044] Those skilled in the art can determine the number of binary bits corresponding to the parallel data signal and the number of parallel data interfaces in the row driving unit according to the number of row channels controlled by each first row driving unit, and the present application does not limit this. For example, each first row driving unit controls 32 row channels, the number of binary bits corresponding to the parallel data signal can be 5 bits, and the row driving unit can include 5 parallel data interfaces.

[0045] Those skilled in the art can determine the number of binary bits corresponding to the enable signal and the number of enable signal interfaces in the first row drive unit according to the number of first row drive units corresponding to each first LED array, and the present application does not limit this. For example, each first LED array corresponds to 4 first row drive units, the number of binary bits corresponding to the enable signal can be 2 bits, and the first row drive unit can include 2 enable signal interfaces.

[0046] In a possible implementation, the row control signal includes a serial data signal and a clock signal (i.e., a digital clock signal); the at least one LED array includes a second LED array, each of the second LED arrays corresponds to a second column driver unit and a plurality of second row driver units, and the plurality of second row driver units corresponding to each of the second LED arrays are connected in sequence, the second column driver unit is used to send the serial data signal to the first second row driver unit among the plurality of second row driver units connected in sequence, and to send the clock signal to each of the second row driver units controlled; each of the second row driver units is used to transmit the received serial data signal to the next second row driver unit connected thereto; wherein the serial data signal is used to indicate the scan start time of the row channel controlled by each of the second row driver units, and the clock signal is used to indicate the start time of the row channels controlled by each of the second row driver units being sequentially turned on from the corresponding scan start time.

[0047] Exemplarily, each second row driver unit may include a serial data input interface and a serial data output interface; among the plurality of second row driver units connected in sequence, the serial data output interface of each second row driver unit is connected to the serial data input interface of the next second row driver unit connected; each second row driver unit receives a serial data signal using the serial data input interface, and transmits the serial data signal to the serial data input interface of the next second row driver unit connected using the serial data output interface.

[0048] Exemplarily, each second row driving unit may further include a clock signal interface; the clock signal interface is used to receive a clock signal.

[0049] When a LED array corresponds to multiple row drive units, the multiple row drive units can be connected in series, that is, the multiple row drive units are connected in sequence, and each row drive unit is respectively connected to the column drive unit corresponding to the LED array. The column drive unit sends a serial data signal to the first row drive unit, and each row drive unit transmits the serial data signal to the next row drive unit; at the same time, the column drive unit sends a clock signal to each row drive unit.

[0050] For example, Figure 4 A schematic diagram of the structure of an LED driving device according to an embodiment of the present application is shown as follows: Figure 4 As shown, the LED driving device is used to drive LED array 1 and LED array 2, LED array 1 corresponds to column driving unit 1, row driving unit 1-1 and row driving unit 1-2, LED array 2 corresponds to column driving unit 2, row driving unit 2-1 and row driving unit 2-2.

[0051] The row control signal may include a serial data signal ROW_SDI and a clock signal ROW_DCK, and each row driver unit may include a serial data input interface (serial digital interface, SDI), a serial data output interface (SerialData Out, SDO) and a clock signal interface DCK. The two row driver units corresponding to the same LED array are connected in sequence, the SDI interface of the first row driver unit is connected to the column driver unit corresponding to the LED array, the SDO interface of the first row driver unit is connected to the SDI interface of the second row driver unit, and the DCK interfaces of the first row driver unit and the second row driver unit are both connected to the column driver unit corresponding to the LED array; wherein the SDI interface is used to receive ROW_SDI, the SDO interface is used to output ROW_SDI to the SDI interface connected thereto; and the DCK interface is used to receive ROW_DCK.

[0052] Taking the control of opening each row channel in the LED array 1 as an example, the column driver unit 1 sends a clock signal ROW_DCK to the row driver unit 1-1 and the row driver unit 1-2 respectively, and sends ROW_SDI to the row driver unit 1-1. ROW_SDI is used to indicate the scan opening time of the row channel. When ROW_SDI changes from a low level to a high level, it indicates that the row channel controlled by the row driver unit can start to be opened row by row; ROW_DCK can be a periodic clock signal, and the rising edge of ROW_DCK can be used as a line break signal. After the row driver unit receives ROW_DCK, when the rising edge of ROW_DCK arrives, the opened row channel controlled by the row driver unit shifts once (that is, from the mth row channel opening to the m+1th row channel opening, and the mth row channel is closed at the same time); in this way, the row channel can be controlled to be opened row by row from the corresponding scan opening time through ROW_SDI and ROW_DCK. After the SDI interface of the row driver unit 1-1 receives ROW_SDI, if ROW_SDI is always at a low level, the row channel controlled by the row driver unit 1-1 is not turned on; when it is collected that ROW_SDI changes from a low level to a high level, it indicates that the row channel controlled by the row driver unit 1-1 can be turned on, and then when the rising edge of ROW_DCK arrives, the first row channel controlled by the row driver unit 1-1 is turned on, and when the next rising edge of ROW_DCK arrives, the second row channel controlled by the row driver unit 1-1 is turned on, and so on, the row channels controlled by the row driver unit 1-1 can be turned on row by row. After the row channel controlled by the row driver unit 1-1 is turned on row by row, the SDO interface of the row driver unit 1-1 transmits ROW_SDI to the SDI interface of the row driver unit 1-2; when the row driver unit 1-2 detects that ROW_SDI changes from a low level to a high level, it indicates that the row channel controlled by the row driver unit 1-2 can be turned on, and then when the rising edge of ROW_DCK arrives, the row channel controlled by the row driver unit 1-2 is turned on row by row. In this way, through the cooperation of ROW_SDI and ROW_DCK, each row channel in the LED array 1 can be controlled to turn on in sequence, thereby realizing the function of row-by-row scanning.

[0053] It should be noted that, when the LED driving device in the embodiment of the present application is used to drive multiple LED arrays, the multiple LED arrays may all be the first LED array, or all be the second LED array, or some may be the first LED array and some may be the second LED array. The present application does not impose any limitation on this as long as the requirements are met.

[0054] The LED driving device of the embodiment of the present application can use different numbers of column driving units and row driving units to drive LED arrays of different sizes and numbers, and can flexibly design the control method of the column driving unit to the row driving unit, with higher design freedom and more flexible control method. Moreover, when it is necessary to adjust the control method of the column driving unit to the row control unit, it is not necessary to change the control protocol in the main control unit, but only to adjust it inside the column driving unit and the row driving unit, so as to realize flexible control of the row driving unit.

[0055] The present application also proposes a column driver chip, which may include the column driver unit in the LED driver device proposed in the present application, that is, each column driver unit may be implemented by a column driver chip.

[0056] The present application also proposes a row driver chip, which may include the row driver units in the LED driver device proposed in the present application, that is, each row driver unit may be implemented by a row driver chip.

[0057] Exemplarily, the main control unit in the LED driving device proposed in the present application can be implemented by an existing control chip.

[0058] The present application also proposes a display device, comprising the LED driving device proposed in the present application and a display panel; the display panel comprises at least one LED array; the LED driving device is used to drive the at least one LED array.

[0059] Exemplarily, the display panel may be any one of a light emitting diode display panel, a micro light emitting diode display panel, a mini light emitting diode display panel, a quantum dot light emitting diode display panel, and an organic light emitting diode display panel.

[0060] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An LED driving device, characterized in that: Used to drive at least one LED array; the device comprises: a main control unit, a column driving unit corresponding to each LED array and at least one row driving unit; the column driving unit corresponding to each LED array is used to control each row driving unit corresponding to the LED array; The main control unit is used to send a main control signal to control the column driving unit; The column driving unit is used to receive the main control signal and provide a driving current for each column of LEDs in the LED array that the column driving unit needs to drive according to the main control signal, and to generate and send a row control signal to the row driving unit controlled by the column driving unit according to the main control signal; The row driving unit is used to receive the row control signal and control the corresponding row channel in the LED array corresponding to the row driving unit to turn on or off according to the row control signal.

2. The device according to claim 1, characterized in that The at least one LED array includes a first LED array, each of the first LED arrays corresponds to a first column driving unit and a plurality of first row driving units, and each of the first row driving units corresponding to each of the first LED arrays is respectively connected to the first column driving unit corresponding to the first LED array, The first column driving unit is used to send the row control signal to each of the first row driving units controlled by the first column driving unit.

3. The device according to claim 2, characterized in that The row control signal includes a parallel data signal and an enable signal; each of the first row driving units includes a parallel data interface and an enable signal interface; Among them, the enable signal is used to indicate a target row driving unit among the multiple first row driving units; the parallel data signal is used to indicate a row channel that needs to be turned on among the row channels controlled by the target row driving unit; the parallel data interface is used to receive the parallel data signal; and the enable signal interface is used to receive the enable signal.

4. The device according to claim 1, characterized in that The row control signal includes a serial data signal and a clock signal; The at least one LED array includes a second LED array, each of the second LED arrays corresponds to a second column driving unit and a plurality of second row driving units, and the plurality of second row driving units corresponding to each of the second LED arrays are connected in sequence, The second column driving unit is used to send the serial data signal to the first second row driving unit among the plurality of second row driving units connected in sequence and send the clock signal to each of the second row driving units; Each of the second-row driving units is used to transmit the received serial data signal to the next second-row driving unit connected thereto; The serial data signal is used to indicate the scan start time of each second row driving unit controlling the row channel, and the clock signal is used to indicate the start time of each row channel controlled by the second row driving unit being sequentially turned on from the corresponding scan start time.

5. The device according to claim 4, characterized in that Each of the second row driving units comprises a serial data input interface and a serial data output interface; among the plurality of second row driving units connected in sequence, the serial data output interface of each second row driving unit is connected to the serial data input interface of the next second row driving unit connected; Each of the second-row driving units receives the serial data signal by using the serial data input interface, and transmits the serial data signal to the serial data input interface of the next second-row driving unit connected thereto by using the serial data output interface.

6. The device according to claim 5, characterized in that Each of the second row driving units further includes a clock signal interface; the clock signal interface is used to receive the clock signal.

7. The device according to claim 1, characterized in that The main control signal includes display data corresponding to the at least one LED array.

8. A column driver chip, characterized in that: The invention comprises a column driving unit in the LED driving device according to any one of claims 1 to 7.

9. A row driver chip, characterized in that: The invention comprises a row driving unit in the LED driving device according to any one of claims 1 to 7.

10. A display device, characterized in that: It comprises an LED driving device and a display panel as described in any one of claims 1 to 7; the display panel comprises at least one LED array.

11. The display device according to claim 10, characterized in that: The display panel is any one of a light emitting diode display panel, a micro light emitting diode display panel, a mini light emitting diode display panel, a quantum dot light emitting diode display panel, and an organic light emitting diode display panel.

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