Display driving system and display panel

Abstract

The present disclosure relates to a display driving system and a display panel, wherein the display driving system includes a plurality of cascaded driving circuits; each of the driving circuits decodes the received display data and stores the first group of image data in the display data, drives the pixel unit corresponding to the driving circuit according to the stored image data, and the driving circuit forwards the reconstructed display data to the next-level driving circuit by adjusting the display data; the driving circuit determines the working mode of the driving circuit according to the decoding result of the control data. The display driving system and display panel provided by the present disclosure regenerate the display data before each driving circuit forwards the image data, thereby reducing the attenuation of the data signal and realizing long-distance transmission. At the same time, the display device provided by the present disclosure reduces the probability of the first group of image data being interfered by noise and burrs by adding control data before the first group of image data in the display data.

Description

Technical Field

[0001] The present disclosure relates to the field of display devices, and in particular to a display driving system and a display panel. Background Art

[0002] At present, the driving integrated circuit inside the display device usually includes multiple cascaded LED driving circuits. The display device drives the multiple cascaded LED driving circuits through display data to achieve the purpose of driving and controlling the display state of each LED pixel unit in the display device according to the display data.

[0003] However, the display data usually includes multiple groups of image data. During the transmission process, if the image data in the first group has burrs, it is easy to cause the display data to be misread, so that the corresponding LED driver circuit cannot generate the correct drive signal to drive the LED pixel unit. In addition, due to factors such as the inconsistency of the process processing of the driver integrated circuit and the changes in the application environment, the pulse width of the display data will gradually distort during the transmission process, so that when there are many cascaded LED driver circuits in the driver integrated circuit, the pulse of the display data will not be able to represent the data information it carries, resulting in the data transmission being limited by the number of cascaded LED driver circuits and unable to achieve unlimited cascading.

[0004] Therefore, how to ensure that the driving integrated circuit can work normally while reducing the probability of image data being interfered by noise and burrs and ensuring that the pulse width of the display data remains unchanged has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, the present disclosure proposes a display driving system and a display panel.

[0006] According to one aspect of the present disclosure, a display driving system is provided, the display driving system comprising a plurality of cascaded driving circuits; each of the driving circuits decodes received display data, stores a first set of image data in the display data, and drives a pixel unit corresponding to the driving circuit according to the stored image data; the driving circuit adjusts the display data and forwards the reconstructed display data to a next-level driving circuit; the driving circuit determines an operating mode of the driving circuit according to a decoding result of control data in the display data.

[0007] Furthermore, the display data includes control data and multiple groups of image data, and the reconstructed display data includes the control signal and other groups of image data in the input display data that are not stored by the driving circuit.

[0008] Furthermore, the driving circuit determines the working mode of the driving circuit by presetting the continuous number of data starting from the first bit of the decoding result of the control data.

[0009] Furthermore, the binary data 1 is the preset data, or when, within the transmission period of 1 bit of data in the display data, the ratio of the duration of the high level received by the input port of the driving circuit to the duration of the low level is equal to the preset ratio, the data received by the driving circuit is the preset data.

[0010] Further, starting from the first bit of the decoding result of the control data, when the continuous number of the preset data is within the first preset data range, the driving circuit is controlled to execute the first working mode; when the continuous number of the preset data is within the second preset data range, the driving circuit is controlled to execute the second working mode; when the continuous number of the preset data is within the third preset data range, the driving circuit is controlled to execute the third working mode; when the continuous number of the preset data is within the fourth preset data range, the driving circuit is controlled to execute the fourth working mode; when the continuous number of the preset data is within the fifth preset data range, the driving circuit is controlled to execute the fifth working mode; when the continuous number of the preset data is within the sixth preset data range, the driving circuit is controlled to execute the sixth working mode.

[0011] Furthermore, the first working mode is to control the driving circuit, store the decoding results of the first group of image data, and drive the corresponding LED pixel unit according to the stored decoding results; the second working mode is to reset the data storage device in the driving circuit; the third working mode is to control the current output module in the driving circuit to be in an on state within a preset time; the fourth working mode is to switch the driving circuit to a standby state; the fifth working mode is to switch the fourth working mode to the first working mode; the sixth working mode is to control the driving circuit to execute a test mode, wherein, in the test mode, the driving circuit outputs a signal at a preset output component.

[0012] Furthermore, the driving circuit includes: a data oscillator, a data decoder, a data memory and a data regenerator; the data decoder decodes the display data according to the pulse signal output by the data oscillator, and outputs the decoded display data, and the decoded display data is binary data; the data regenerator obtains the control data and at least one group of the image data not stored by the data memory to reconstruct the display data, and forwards the reconstructed display data to the next level driving circuit through the port of the driving circuit. Further, the driving circuit also includes: a PWM generator; the PWM generator outputs a PWM signal according to the decoding result of the first group of image data, and the PWM signal is used to drive the corresponding LED pixel unit.

[0013] Furthermore, the driving circuit also includes an input detector; the input detector generates a port control signal according to the input level of each port of the driving circuit, and the driving circuit determines the input port of display data and the output port of display data according to the port control signal.

[0014] Furthermore, the port control signal includes a first control signal or a second control signal; when the port control signal includes the first control signal, the drive circuit inputs the display data from a first direction and outputs the reconstructed display data from a second direction; when the port control signal includes the second control signal, the drive circuit inputs the display data from a second direction and outputs the reconstructed display data from the first direction.

[0015] Further, in a case where the drive circuit inputs the display data from a first direction and outputs the display data from a second direction, the drive circuit receives the display data forwarded by the previous-level drive circuit and forwards the reconstructed display data to the next-level drive circuit; in a case where the drive circuit inputs the display data from a second direction and outputs the reconstructed display data from a first direction, the drive circuit receives the display data forwarded by the next-level drive circuit and forwards the reconstructed display data to the previous-level drive circuit.

[0016] Further, the port control signal includes a third control signal or a fourth control signal; when the port control signal includes the third control signal, the driving circuit receives display data forwarded by the previous-stage driving circuit, and forwards the reconstructed display data to the next-stage and the subsequent second-stage driving circuit, or receives display data forwarded by the next-stage driving circuit, and forwards the reconstructed display data to the previous-stage and the previous second-stage driving circuit; when the port control signal includes the fourth control signal, the driving circuit receives display data forwarded by the previous-stage driving circuit, and forwards the reconstructed display data to the next-stage and the subsequent second-stage driving circuit, or receives display data forwarded by the subsequent second-stage driving circuit, and forwards the reconstructed display data to the previous-stage and the previous second-stage driving circuit; wherein the previous second-stage driving circuit is a driving circuit separated from the driving circuit by the previous-stage driving circuit, and the subsequent second-stage driving circuit is a driving circuit separated from the driving circuit by the next-stage driving circuit.

[0017] Further, each of the driving circuits includes a first port, a second port, a third port and a fourth port; the second port of each driving circuit is electrically connected to the first port of the next-stage driving circuit, and the fourth port of each driving circuit is electrically connected to the third port of the next-stage driving circuit; in the case where the port control signal includes the first control signal and the third control signal, the driving circuit receives the display data forwarded by the second port of the previous-stage driving circuit through the first port, forwards the reconstructed display data to the first port of the next-stage driving circuit through the second port, and forwards the reconstructed display data to the third port of the next-stage driving circuit through the fourth port; in the case where the port control signal includes the first control signal and the fourth control signal, the driving circuit receives the display data forwarded by the fourth port of the previous-stage driving circuit through the third port, forwards the reconstructed display data to the first port of the next-stage driving circuit through the second port, and forwards the reconstructed display data to the third port of the next-stage driving circuit through the fourth port; In the case where the port control signal includes the second control signal and the third control signal, the driving circuit receives the display data forwarded by the first port of the next-stage driving circuit through the second port, forwards the reconstructed display data to the second port of the previous-stage driving circuit through the first port, and forwards the reconstructed display data to the fourth port of the previous-second-stage driving circuit through the third port; in the case where the port control signal includes the second control signal and the fourth control signal, the driving circuit receives the display data forwarded by the third port of the next-stage driving circuit through the fourth port, forwards the reconstructed display data to the second port of the previous-stage driving circuit through the first port, and forwards the reconstructed display data to the fourth port of the previous-second-stage driving circuit through the third port; wherein the first port, the second port, the third port and the fourth port are all three-state input and output ports; in the case where there is no next-stage or next-second-stage driving circuit in the driving circuit, the output data is sent to the data sending circuit, and the data sending circuit is used to send display data to the display driving system.

[0018] Furthermore, each group of the image data includes 48 bits of RGB data, and the 48 bits of data in each group of the image data include at least 1 bit of data to represent binary data "0".

[0019] Furthermore, the display driving system is applied in a display system to drive at least one pixel unit in the display system.

[0020] According to another aspect of the present disclosure, a display panel is further provided, wherein the display panel comprises the display driving system as described in any one of the foregoing items.

[0021] The display driving system and display panel provided by the present disclosure regenerate data before each driving circuit forwards the display data, thereby reducing the attenuation of the data signal and achieving long-distance transmission. At the same time, the display device provided by the present disclosure adds control data before the first group of image data in the display data, thereby reducing the probability of the first group of image data being interfered by noise and burrs, and the driving circuit in the display driving system can determine the current working mode of the driving circuit according to the decoding result of the control data, so as to achieve the purpose of switching the working mode of the driving circuit, thereby enriching the control of the driving circuit and enhancing the display effect.

[0022] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0024] Figure 1 A schematic diagram of a circuit structure of a display driving system provided by the present invention.

[0025] Figure 2 A schematic diagram showing the data transmission process.

[0026] Figure 3 A schematic diagram of a structure of display data provided by the present disclosure.

[0027] Figure 4 A comparison table of a working mode and a continuous number of preset data provided in an embodiment of the present disclosure.

[0028] Figure 5 A schematic diagram of the structure of a driving circuit provided in an embodiment of the present disclosure.

[0029] Figure 6 A coding diagram of display data provided by an embodiment of the present disclosure.

[0030] Figure 7 A schematic diagram of the structure of another driving circuit provided in an embodiment of the present disclosure.

[0031] Figure 8 A schematic diagram of the circuit structure of another display system provided in an embodiment of the present disclosure.

[0032] Fig. 9 for Figure 8 A schematic diagram of a display data transmission process when a second drive circuit in a circuit of a display drive system fails is provided. DETAILED DESCRIPTION

[0033] Various exemplary embodiments, features and aspects of the present disclosure 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.

[0034] 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.

[0035] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure 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 disclosure.

[0036] See also Figure 1-Figure 3 As shown, the present disclosure provides a display driving system, which includes a plurality of cascaded driving circuits 12 .

[0037] See also Figure 1-Figure 3 As shown, each driving circuit 12 decodes the input display data and stores the first set of image data (such as Figure 3 The LED pixel unit corresponding to the driving circuit is driven according to the stored image data.

[0038] Furthermore, the driving circuit 12 reconstructs the display data and forwards the reconstructed display data to the next-stage driving circuit. The driving circuit 12 determines the working mode of the driving circuit according to the decoding result of the control data in the display data.

[0039] The display driving system provided by the present disclosure regenerates the data before each driving circuit forwards the display data, thereby reducing the attenuation of the data signal and realizing long-distance transmission. At the same time, the display device provided by the present disclosure adds control data before the first group of image data in the display data, thereby reducing the probability of the first group of image data being interfered by noise and burrs, and the driving circuit in the display driving system can determine the current working mode of the driving circuit according to the decoding result of the control data, so as to achieve the purpose of switching the working mode of the driving circuit, thereby enriching the control of the driving circuit and enhancing the display effect.

[0040] See also Figure 1As shown, in a possible implementation, a plurality of cascaded driving circuits 12 are electrically connected to a data sending circuit. The data sending circuit 11 is electrically connected to the head end and the tail end of the plurality of cascaded driving circuits 12 through the P1 port, and the first port Di of each level of driving circuit except the first-level driving circuit is electrically connected to the second port Do of the previous level of driving circuit. The first-level driving circuit receives the display data sent by the data sending circuit P1 port through the first port Di, and each level of driving circuit except the first-level driving circuit receives the display data forwarded by the second port Do of the previous level of driving circuit through the first port Di.

[0041] Furthermore, the data sending circuit 11 sends the display data to the first port Di of the first-level driving circuit through the P1 port. The first-level driving circuit decodes the display data, determines the current working mode according to the decoding result, and stores the first group of image data in the display data, and the image data is used to drive the LED pixel unit corresponding to the driving circuit. The first-level driving circuit reconstructs the display data through the local clock inside the driving circuit, and forwards the reconstructed display data to the next-level driving circuit, wherein the display data includes control data and multiple groups of image data, and the reconstructed display data includes control signals and other groups of image data that have not been stored. The working principles of other driving circuits are the same as those of the first-level driving circuit, so they will not be repeated here.

[0042] Furthermore, the first-stage driving circuit is electrically connected to the P1 port of the data transmission circuit 11 through the first port Di, and is electrically connected to the first port Di of the next-stage driving circuit through the second port Do. The final-stage driving circuit is electrically connected to the second port Do of the previous-stage driving circuit through the first port Di, and is electrically connected to the data transmission circuit 11 through the second port Do.

[0043] The display driving system provided by the present disclosure regenerates the data before each driving circuit forwards the display data, thereby reducing the attenuation of the data signal and achieving long-distance transmission. At the same time, the data can be quickly regenerated using the local clock, reducing the time required for the data regeneration process, and the time required for long-distance transmission is reduced, which can achieve longer-distance transmission. In addition, the display device provided by the present disclosure reduces the probability of the first group of image data being interfered by noise and burrs by adding control data before the first group of image data in the display data, and the driving circuit in the display driving system can determine the current working mode of the driving circuit according to the decoding result of the control data, so as to achieve the purpose of switching the working mode of the driving circuit, thereby enriching the control of the driving circuit and enhancing the display effect.

[0044] See also Figure 1-Figure 3As shown, in some embodiments of the present disclosure, the driving circuit 12 starts with the first bit of the decoding result of the control data and presets the number of consecutive data to determine the working mode of the driving circuit 12.

[0045] Optionally, the preset data is binary data 1, or may be binary data 0, which is not limited in the present disclosure.

[0046] Optionally, whether the data currently input to the driving circuit 12 is preset data may be determined by measuring the voltage change of the input port of the driving circuit 12 .

[0047] Exemplarily, in the transmission cycle of 1 bit of data in the display data, when the ratio of the duration of the high level received by the input port of the driving circuit 12 to the duration of the low level is a preset ratio, the data received by the driving circuit 12 is the preset data. Exemplarily, the high level is a voltage signal with an input voltage greater than VDD / 2, and the low level is a voltage signal with an input voltage less than VDD / 2, wherein VDD is the input voltage of the VDD pin of the driving circuit 12.

[0048] For example, the preset data is binary data "1" as an example. Figure 6 As shown, when the transmission period of 1 bit of data in the display data is 550ns, the voltage change with a high level duration of 330ns and a low level duration of 220ns represents the binary data "1", and the preset ratio should be set to 3 / 2.

[0049] For example, the preset data is binary data "0" as an example. Figure 6 As shown, when the transmission period of 1 bit of data in the display data is 550ns, the voltage change with a high level duration of 110ns and a low level duration of 440ns represents the binary data "0", and the preset ratio should be set to 1 / 4.

[0050] Exemplarily, when the duration of the transmission cycle of 1-bit data in the display data is 550ns, in the voltage change used to represent the binary data "1", the value of the duration of the high level is greater than 220ns, and can be 330ns, and the value of the duration of the low level is greater than 110ns. When the duration of the transmission cycle of 1-bit data in the display data is 550ns, in the voltage change used to represent the binary data "0", the value of the duration of the high level is greater than 60ns and less than 160ns, and can be 110ns, and the value of the duration of the low level is greater than 330ns.

[0051] Exemplarily, the display data includes control data and multiple sets of image data.

[0052] Optionally, the control data includes 48 bits of starting data and 48 bits of adjustable data. Optionally, to facilitate the design of developers, each bit of the starting data in the control data can be used to represent the preset data, that is, when the preset data is binary "1", each bit of the starting data is used to represent the binary data "1", and the data represented by each bit of the adjustable data can be set according to actual conditions.

[0053] Exemplarily, when the preset data is binary data "1", and the number of consecutive data representing "1" in the display data needs to be greater than 56 and less than 60, it can indicate that the drive circuit is in the second working mode. At this time, the developer uses the first data to the ninth data (any bit from the ninth to the eleventh bit) of the adjustable data to represent the preset data "1", and uses the twelfth data of the adjustable data to represent the non-preset data "1", thereby ensuring that the number of data representing the preset data "1" continuously in the display data is greater than 56 and less than 60, so that the drive circuit is in the second working mode.

[0054] Optionally, a group of image data may include part of the data in a frame of image data, which may be displayed by the corresponding pixel unit on the display panel. For example, each group of image data may include 48 bits of RGB data (each group of image data may also include 36 bits of RGB data of the same number of bits, etc.), and in the case where the starting data in the control data is used to represent 48 bits of preset data (such as "1"), in order to prevent the image data from being mistakenly regarded as the starting data by the driving circuit, the 48 bits of data in each group of image data in each group of image data include at least 1 bit of data to represent non-preset data (such as when the preset data is "1", the non-preset data is "0"). Optionally, in the case where the preset data is binary data "1", if the image data needs to be represented by 48 bits of "1" data, the staff is required to change the preset number of data "1" to data 0 in the image data, for example, the image data is set to 47 bits of "1" data and 1 bit of "0" data.

[0055] The present disclosure does not impose any restrictions on the number of bits and content of the control data, and the number of bits of each set of image data.

[0056] The display driving system provided in the embodiment of the present disclosure instructs the driving circuit to control the LED pixel unit through 48-bit image data. Compared with the 24-bit image data in the prior art, the display driving system provided by the present disclosure adds 8 bits of grayscale value, so that the display driving system can present richer color images.

[0057] In some embodiments provided by the present disclosure, starting from the first bit of the decoding result of the control data in the display data, when the continuous number of preset data is within the first preset data range, the control driving circuit 12 executes the first working mode. When the continuous number of preset data is within the second preset data range, the control driving circuit 12 executes the second working mode. When the continuous number of preset data is within the third preset data range, the control driving circuit 12 executes the third working mode. When the continuous number of preset data is within the fourth preset data range, the control driving circuit 12 executes the fourth working mode. When the continuous number of preset data is within the fifth preset data range, the control driving circuit 12 executes the fifth working mode. When the continuous number of preset data is within the sixth preset data range, the control driving circuit 12 executes the sixth working mode. See. Figure 1-Figure 4 As shown in , optionally, the first working mode is to control the drive circuit 12, store the decoding result of the first group of image data, and drive the corresponding LED pixel unit according to the stored decoding result. Accordingly, the first preset data range can be set to the number of bits of the starting data in the control data. For example, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the first preset data range can be a positive integer greater than 47 and less than or equal to 48. That is, when the drive circuit demodulates the control data, when the demodulation result of the 49th bit of the control data is non-preset data, the drive circuit 12 enters the first working mode and starts to store image data.

[0058] Optionally, the second working mode is to reset the data memory 123 in the driving circuit 12. Accordingly, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the second preset data range is a positive integer greater than or equal to 56 and less than 64. That is, when the driving circuit demodulates the control data, when the demodulation result of the first 56 bits of the control data is the preset data, and the demodulation result of the first 64 bits of the control data is non-preset data, the driving circuit 12 enters the second working mode, and the driving circuit 12 resets the data memory 123. Exemplarily, resetting the data memory 123 in the driving circuit 12 is to restore the data memory 123 to an initial state.

[0059] Optionally, the third working mode is to control the constant current output module in the drive circuit 12 to be in a conducting state within a preset time. Accordingly, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the third preset data range is a positive integer greater than or equal to 64 and less than 68. That is, when the drive circuit demodulates the control data, when the demodulation result of the first 64 bits of the control data is the preset data, and the demodulation result of the first 68 bits of the control data is non-preset data, the drive circuit 12 enters the third working mode, that is, the drive circuit controls the constant current output module inside it to be in a conducting state within the preset time.

[0060] Optionally, the fourth working mode is to switch the drive circuit 12 to a standby state, in which the analog circuit in the drive circuit 12 no longer works, which can reduce the power of the drive circuit to the greatest extent, thereby reducing the power consumption of the entire display drive system. Correspondingly, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the fourth preset data range is a positive integer greater than or equal to 68 and less than 72. That is, when the drive circuit demodulates the control data, when the demodulation result of the first 68 bits of the control data is the preset data, and the demodulation result of the first 72 bits of the control data is non-preset data, the drive circuit 12 enters the fourth working mode, that is, the control drive circuit 12 turns off the internal analog circuit.

[0061] Optionally, the fifth working mode is to start the analog circuit in the driving circuit 12. Accordingly, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the fifth preset data range is a positive integer greater than or equal to 32 and less than 48. Accordingly, when the driving circuit demodulates the control data, when the demodulation result of the first 32 bits of the control data is the preset data, and the demodulation result of the first 48 bits of the control data is non-preset data, the driving circuit 12 enters the fifth working mode, that is, the driving circuit 12 is controlled to start the internal analog circuit. At this time, the demodulation result of the starting data in the control data includes binary data "0" and binary data "1", and in order to prevent the driving circuit from mistaking the image data identical to the starting data for the starting data, the image data identical to the starting data should not exist in this control data.

[0062] Optionally, the sixth working mode is to control the drive circuit 12 to execute a test mode, wherein, in this test mode, the drive circuit 12 outputs a signal at a preset output component. Exemplarily, the above-mentioned output components include but are not limited to output PADs, chip pins, etc. Correspondingly, when the control data is 96 bits (48 bits of starting data and 48 bits of adjustable data), the sixth preset data range is a positive integer greater than or equal to 72. That is, when the drive circuit demodulates the control data, when the demodulation results of the first 72 bits of the control data are all preset data, the drive circuit 12 enters the sixth working mode, that is, the control drive circuit 12 executes the test mode.

[0063] Exemplarily, in the third operating mode, the fourth operating mode, and the sixth operating mode, the display panel including the display driving system does not display an image.

[0064] For example, see Figure 6 As mentioned above, the current working mode of the driving circuit 12 can be determined according to the voltage change of the input port of the driving circuit 12. Exemplarily, when the voltage of the input port of the driving circuit 12 maintains the preset state for a time greater than T1M and less than or equal to T2M, the driving circuit 12 is controlled to execute the first working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time greater than or equal to T3M and less than T4M, the driving circuit 12 is controlled to execute the second working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time greater than or equal to T4M and less than T5M, the driving circuit 12 is controlled to execute the third working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time greater than or equal to T5M and less than T6M, the driving circuit 12 is controlled to execute the fourth working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time greater than or equal to T7M and less than T2M, the driving circuit 12 is controlled to execute the fifth working mode. When the voltage at the input port of the driving circuit 12 maintains the preset state for a time period greater than or equal to T6M, the driving circuit 12 is controlled to execute the sixth working mode.

[0065] Exemplarily, the preset state is a state in which, within the transmission period of 1 bit of data in the display data, the ratio of the duration of the high level received by the input port of the driving circuit 12 to the duration of the low level is equal to a preset ratio. In this state, the data received by the driving circuit 12 is preset data.

[0066] Optionally, in the case where the control data includes 96 transmission cycles of 1-bit data, the above T1M is equal to 47*550ns, and T2M is equal to 48*550ns, that is, when the input voltage of the input port of the driving circuit 12 maintains the preset state for a time period greater than 47*550ns (T1M) and less than or equal to 48*550ns (T2M), the driving circuit 12 is controlled to execute the first working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time period greater than or equal to 56*550ns (T3M) and less than 64*550ns (T4M), the driving circuit 12 is controlled to execute the second working mode. When the voltage of the input port of the driving circuit 12 maintains the preset state for a time period greater than or equal to 64*550ns (T4M) and less than 68*550ns (T5M), the driving circuit 12 is controlled to execute the third working mode. When the voltage at the input port of the drive circuit 12 maintains a preset state for a time greater than or equal to 68*550ns (T5M) and less than 72*550ns (T6M), the drive circuit 12 is controlled to execute the fourth working mode. When the voltage at the input port of the drive circuit 12 maintains a preset state for a time greater than or equal to 32*550ns (T7M) and less than 48*550ns (T2M), the drive circuit 12 is controlled to execute the fifth working mode. When the voltage at the input port of the drive circuit 12 maintains a preset state for a time greater than or equal to 72*550ns (T6M), the drive circuit 12 is controlled to execute the sixth working mode. It is worth noting that the embodiments of the present disclosure do not limit the operations performed by the drive circuit in each working mode, nor do they limit the relationship between the preset data range and the working mode. The above numerical values ​​and working modes are only exemplary for the present disclosure.

[0067] The display driving system provided by the present disclosure reduces the probability of the first set of image data being interfered by noise and burrs by adding control data before the first set of image data in the display data. In addition, developers can divide different working modes by setting different preset data ranges, so as to achieve the purpose of flexibly adjusting the switching of the driving circuit working mode.

[0068] See also Figure 5 As shown, in some embodiments of the present disclosure, the driving circuit 12 includes: a data oscillator 121 , a data decoder 122 , a data memory 123 and a data regenerator 124 .

[0069] Furthermore, the data decoder 122 decodes the display data according to the pulse signal output by the data oscillator 121 and outputs the decoded display data, wherein the decoded display data is binary data.

[0070] For example, see Figure 6As shown, the display data is encoded using a unipolar return-to-zero code. The minimum period in the display data is T s The high level bit duration of data "0" is T0H, and the low level bit duration is T0L. The high level bit duration of data "1" is T1H, and the low level bit duration is T1L.

[0071] Optional, T s The value of is 550ns. The value range of the high level bit duration T0H of data "0" is greater than 60ns and less than 220ns, and the value of T0H can be selected as 110ns. The value range of the low level bit duration T0L is greater than 330ns, and the value of T0L can be selected as 440ns. The value range of the high level bit duration T1H of data "1" is greater than 220ns, and the value of T1H can be selected as 330ns. The value range of the low level bit duration T1L is greater than 110ns, and the value of T1L can be selected as 220ns.

[0072] Furthermore, the data memory 123 stores the first set of image data in the decoding result, the data regenerator 124 obtains the control data not stored in the data memory 123 and at least one set of image data to reconstruct the display data, and forwards the reconstructed display data to the next level driving circuit 12 through the port of the driving circuit 12.

[0073] Furthermore, the driving circuit 12 further includes: a PWM generator, wherein the PWM generator outputs a PWM signal according to the decoding result of the first set of image data, and the PWM signal is used to drive the corresponding LED pixel unit to display the stored first set of image data.

[0074] The display driving system provided by the present disclosure regenerates the data before each driving circuit forwards the display data, thereby reducing the attenuation of the data signal and achieving long-distance transmission. At the same time, the data can be quickly regenerated using the local clock, reducing the time required for the data regeneration process, and the time required for long-distance transmission is reduced, which can achieve longer-distance transmission. In addition, the display device provided by the present disclosure reduces the probability of the first group of image data being interfered by noise and burrs by adding control data before the first group of image data in the display data, and the driving circuit in the display driving system can start from the first group of data of the decoding result of the control data, preset the continuous number of data, determine the current working mode of the driving circuit, and achieve the purpose of switching the working mode of the driving circuit.

[0075] See also Figure 7As shown, in a possible implementation, the driving circuit 12 further includes an input detector 126. The input detector 126 generates a port control signal according to the input level of each port of the driving circuit 12, and the driving circuit 12 determines the input port and the output port of the display data according to the port control signal.

[0076] Exemplarily, the first port Di, the second port Do, the third port FA and the fourth port FB respectively include signal input ports (i.e. Di_i, Do_i, FA_i and FB_i) and signal output ports (i.e. Di_o, Do_o, FA_o and FB_o). The input detector 126 outputs a port control signal according to the input level of the signal input ports (i.e. Di_i, Do_i, FA_i and FB_i) of the first port Di, the second port Do, the third port FA and the fourth port FB, and inputs the port control signal to the input selector 125, and the input selector 125 determines the display data input port and the display data output port of the circuit according to the port control signal. Among them, the first port Di, the second port Do, the third port FA and the fourth port FB are all three-state input and output ports.

[0077] Exemplarily, when the input level of a certain port of the driving circuit 12 is at a high level, the port control signal generated by the input detector 126 of the driving circuit instructs the driving circuit to set the port as the input port of the display data. Exemplarily, when the input level of the first port Di or the third port FA is at a high level, the input detector 126 generates a first control signal. When the input level of the second port Do or the fourth port FB is at a high level, the input detector 126 generates a second control signal. When the input level of the first port Di is at a high level, or the input level of the second port Do is at a high level, the input detector 126 generates a third control signal. When the input level of the first port Di and the second port Do is at a low level, and the input level of the third port FA or the fourth port FB is at a high level, the input detector 126 generates a fourth control signal. Thus, when the input level of the first port Di is at a high level, the input detector 126 generates the first control signal and the third control signal, and at this time, the driving circuit 12 receives the display data forwarded by the upper-level driving circuit through the first port Di. When the input level of the second port Do is high, the input detector 126 generates the second control signal and the third control signal, and at this time, the drive circuit 12 receives the display data forwarded by the next-stage drive circuit through the second port Do. When the input levels of the first port Di and the second port Do are low, and the input level of the third port FA is high, the input detector 126 generates the first control signal and the fourth control signal, and at this time, the drive circuit 12 receives the display data forwarded by the second-stage drive circuit through the third port FA. When the input levels of the first port Di and the second port Do are low, and the input level of the fourth port FB is high, the input detector 126 generates the second control signal and the fourth control signal, and at this time, the drive circuit 12 receives the display data forwarded by the second-stage drive circuit through the fourth port FB.

[0078] Further, the port control signal generated by the input detector 126 includes a first control signal or a second control signal. When the port control signal includes the first control signal, the drive circuit 12 inputs display data from a first direction and outputs reconstructed display data from a second direction.

[0079] Further, in the case where the port control signal includes the second control signal, the driving circuit inputs the display data from the second direction and outputs the reconstructed display data from the first direction.

[0080] Exemplarily, when the drive circuit inputs display data from a first direction and outputs reconstructed display data from a second direction, the drive circuit receives display data forwarded by a previous drive circuit and forwards the reconstructed display data to a next drive circuit. When the drive circuit inputs display data from a second direction and outputs reconstructed display data from a first direction, the drive circuit receives display data forwarded by a next drive circuit and forwards the reconstructed display data to a previous drive circuit.

[0081] It is equivalent to that the data sending circuit 11 can send display data to the head and tail ends of multiple cascaded driving circuits 12 at the same time, and each driving circuit 12 can receive display data from different data transmission directions according to the port control signal generated by the input detector 126, and store the image data corresponding to it in the display data in the data storage 123. When driving the LED pixel unit, the LED pixel unit is driven only according to the stored image data. In the case where the port control signal generated by the input detector 126 includes the first control signal, the driving circuit 12 receives the display data forwarded by the second port Do of the previous driving circuit through the first port Di, and forwards the reconstructed display data to the first port Di of the next driving circuit through the second port Do. In the case where the port control signal generated by the input detector 126 includes the second control signal, the driving circuit receives the display data forwarded by the first port Di of the next driving circuit through the second port Do, and forwards the reconstructed display data to the second port Do of the previous driving circuit through the first port Di. Among them, the first port Di and the second port Do of the driving circuit 12 are three-state input and output ports.

[0082] In the display driving system provided by the present disclosure, when there is a faulty driving circuit inside the system, although the next-level driving circuit 12 of the faulty circuit cannot obtain display data from the first port Di, it can still receive the display data forwarded by the first port Di of the next-level driving circuit 12 through the second port Do, thereby avoiding the occurrence of a full-screen display situation affected by damage to a driving circuit in the display driving system.

[0083] See also Figure 7 As shown, in a possible implementation manner, the port control signal generated by the input detector 126 includes a third control signal or a fourth control signal.

[0084] Further, when the port control signal includes a third control signal, the driving circuit 12 receives display data forwarded by the previous-level driving circuit, and forwards the reconstructed display data to the next-level and second-level driving circuits, or receives display data forwarded by the next-level driving circuit, and forwards the reconstructed display data to the previous-level and second-level driving circuits.

[0085] Further, when the port control signal includes a fourth control signal, the driving circuit 12 receives display data forwarded by the previous second-stage driving circuit, and forwards the reconstructed display data to the next-stage and subsequent second-stage driving circuits, or receives display data forwarded by the subsequent second-stage driving circuit, and forwards the reconstructed display data to the previous stage and the previous second-stage driving circuit.

[0086] This means that, except for the first-stage driving circuit, each stage of driving circuit is electrically connected to its previous stage of driving circuit and the second-stage driving circuit before it.

[0087] Exemplarily, when the data sending circuit 11 sends display data to the first port Di of the first-level driving circuit through the P1 port, and sends the display data to the third port FA of the next-level driving circuit of the first-level driving circuit through the P1D port, the first port Di of the driving circuit 12 is used to receive the display data forwarded by the previous-level driving circuit, the second port Do of the driving circuit is used to forward the display data, the third port FA of the driving circuit 12 is used to receive the display data forwarded by the previous second-level driving circuit, and the fourth port FB of the driving circuit 12 is used to forward the display data to the third port FA of the next second-level driving circuit.

[0088] Exemplarily, when the data sending circuit 11 sends the display data to the second port Do of the final driving circuit through the N1 port, and sends the display data to the fourth port FB of the previous driving circuit of the final driving circuit through the N1D port. The second port Do of the driving circuit 12 is used to receive the display data forwarded by the next driving circuit, the first port Di of the driving circuit 12 is used to forward the display data, the third port FA of the driving circuit 12 is used to forward the display data to the fourth port FB of the previous second driving circuit, and the fourth port FB of the driving circuit 12 is used to receive the display data forwarded by the next second driving circuit.

[0089] Exemplarily, the front second-stage driving circuit is a driving circuit that is separated from the driving circuit by a previous stage, and the rear second-stage driving circuit is a driving circuit that is separated from the driving circuit by a next stage. Figure 8 The middle driving circuit 91 is a second-stage driving circuit before the driving circuit 93 , and the driving circuit 93 is a second-stage driving circuit after the driving circuit 91 .

[0090] Optionally, in the case where there is no faulty driving circuit in the multiple cascaded driving circuits 12, the driving circuit obtains the display data forwarded by the second port Do of the driving circuit at the previous stage through the first port Di.

[0091] Optionally, when there is a faulty driving circuit among the multiple cascaded driving circuits 12, the next-stage driving circuit of the faulty driving circuit obtains display data forwarded by the fourth port FB of the previous-stage driving circuit of the faulty driving circuit through the third port FA. Optionally, the next-stage driving circuit of the faulty driving circuit may also obtain display data forwarded by the fourth port FA of the previous-stage driving circuit of the faulty driving circuit through the fourth port FB.

[0092] See also Figure 8-Figure 9 As shown, when the second driving circuit 92 is a faulty circuit, the third driving circuit 93 obtains the display data forwarded by the first driving circuit 91 through the third port FA, stores the image data in the first group of the display data, and reconstructs the display data, and the reconstructed display data includes the control data and the remaining image data. The third driving circuit 93 decodes the reconstructed display data, and determines the first bit of the decoding result, the continuous number of preset data, and determines the working mode of the third driving circuit 93.

[0093] Further, such as Figure 8 As shown in FIG. 1 , the second port Do and the fourth port FB of the second driving circuit 92 cannot output the display data s3 and p3 due to circuit failure.

[0094] The driving circuit in the display driving system provided by the present invention can not only obtain the display data forwarded by the previous-stage driving circuit but also obtain the display data forwarded by the previous-stage driving circuit, which is equivalent to the driving circuit being able to obtain the display data received and forwarded by the previous-stage driving circuit, thereby realizing breakpoint transmission and preventing the problem in the display driving system that the driving circuits connected in series with the single driving circuit cannot work due to damage thereto.

[0095] See also Figure 8 As shown, in a possible implementation manner, each of the driving circuits includes a first port Di, a second port Do, a third port FA and a fourth port FB.

[0096] Furthermore, the second port Do of each driving circuit is electrically connected to the first port Di of the next-stage driving circuit, and the fourth port FB of each driving circuit is electrically connected to the third port FA of the next-stage driving circuit.

[0097] Exemplarily, when the port control signal includes a first control signal and a third control signal, the driving circuit receives display data forwarded by the second port Do of the previous-stage driving circuit through the first port Di, forwards the reconstructed display data to the first port Di of the next-stage driving circuit through the second port Do, and forwards the reconstructed display data to the third port FA of the next-stage driving circuit through the fourth port FB.

[0098] Exemplarily, when the port control signal includes a first control signal and a fourth control signal, the driving circuit receives display data forwarded by the fourth port FB of the front second-stage driving circuit through the third port FA, forwards the reconstructed display data to the first port Di of the next-stage driving circuit through the second port Do, and forwards the reconstructed display data to the third port FA of the rear second-stage driving circuit through the fourth port FB.

[0099] Exemplarily, when the port control signal includes a second control signal and a third control signal, the driving circuit receives display data forwarded by the first port Di of the next-level driving circuit through the second port Do, forwards the reconstructed display data to the second port Do of the previous-level driving circuit through the first port Di, and forwards the reconstructed display data to the fourth port FB of the previous second-level driving circuit through the third port FA.

[0100] Exemplarily, when the port control signal includes the second control signal and the fourth control signal, the driving circuit receives the display data forwarded by the third port FA of the rear second-stage driving circuit through the fourth port FB, forwards the reconstructed display data to the second port Do of the previous-stage driving circuit through the first port Di, and forwards the reconstructed display data to the fourth port FB of the front second-stage driving circuit through the third port FA.

[0101] Exemplarily, the front second-stage driving circuit of the driving circuit is a driving circuit that is one stage ahead of the driving circuit, and the rear second-stage driving circuit of the driving circuit is a driving circuit that is one stage ahead of the driving circuit.

[0102] Exemplarily, when the driving circuit does not have a next-stage or second-stage driving circuit, the output data is sent to a data sending circuit, and the data sending circuit is used to send display data to the display driving system.

[0103] In some embodiments of the present disclosure, the present disclosure further provides a display panel, which includes the display driving system described above.

[0104] Exemplarily, the display panel provided by the present disclosure is a display panel selected from the group consisting of a liquid crystal 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.

[0105] The display panel provided by the present disclosure reduces the probability of the first set of image data being interfered by noise and burrs by adding control data before the first set of image data in the display data. In addition, developers can divide different working modes by setting different preset data ranges, so as to achieve the purpose of flexibly adjusting the switching of the driving circuit working mode.

[0106] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations 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 to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A display driving system, characterized in that: The display driving system comprises a plurality of cascaded driving circuits; Each of the driving circuits decodes the received display data, stores a first set of image data in the display data, and drives a pixel unit corresponding to the driving circuit according to the stored image data; The driving circuit forwards the reconstructed display data to the next-stage driving circuit by adjusting the display data; The driving circuit starts with the first bit of data of the decoding result of the control data in the display data, presets the number of consecutive data, and determines the working mode of the driving circuit.

2. The display driving system according to claim 1, characterized in that: The display data includes control data and multiple groups of image data, and the reconstructed display data includes control signals and other groups of image data in the input display data that are not stored by the driving circuit.

3. The display driving system according to claim 1, characterized in that: Binary data 1 is the preset data, or when, within the transmission period of 1 bit of data in the display data, the ratio of the duration of the high level received by the input port of the driving circuit to the duration of the low level is equal to the preset ratio, the data received by the driving circuit is the preset data.

4. The display driving system according to claim 1, characterized in that: Starting from the first bit of the decoded result of the control data, When the number of consecutive preset data is within a first preset data range, controlling the driving circuit to execute a first working mode; When the number of consecutive preset data is within a second preset data range, controlling the driving circuit to execute a second working mode; When the number of consecutive preset data is within a third preset data range, controlling the driving circuit to execute a third working mode; When the number of consecutive preset data is within a fourth preset data range, controlling the driving circuit to execute a fourth working mode; When the number of consecutive preset data is within a fifth preset data range, controlling the driving circuit to execute a fifth working mode; When the continuous number of the preset data is within a sixth preset data range, the driving circuit is controlled to execute a sixth working mode.

5. The display driving system according to claim 4, characterized in that: The first working mode is to control the driving circuit, store the decoding result of the first group of image data, and drive the corresponding LED pixel unit according to the stored decoding result; The second working mode is to reset the data storage in the driving circuit; The third working mode is to control the current output module in the driving circuit to be in a conducting state within a preset time; The fourth working mode is to switch the driving circuit to a standby state; The fifth working mode is to switch the fourth working mode to the first working mode; The sixth working mode is to control the driving circuit to execute a test mode, wherein in the test mode, the driving circuit outputs a signal at a preset output component.

6. The display driving system according to claim 1, characterized in that: The driving circuit includes: a data oscillator, a data decoder, a data storage device and a data regenerator; The data decoder decodes the display data according to the pulse signal output by the data oscillator, and outputs the decoded display data, wherein the decoded display data is binary data; The data regenerator obtains the control data not stored in the data memory and at least one set of the image data to reconstruct display data, and forwards the reconstructed display data to the next-stage driving circuit through the port of the driving circuit.

7. The display driving system according to claim 1, characterized in that: The driving circuit further comprises: a PWM generator; The PWM generator outputs a PWM signal according to the decoding result of the first set of image data, and the PWM signal is used to drive the corresponding LED pixel unit.

8. The display driving system according to claim 1, characterized in that: The driving circuit also includes an input detector; The input detector generates a port control signal according to the input level of each port of the driving circuit, and the driving circuit determines the input port of display data and the output port of display data according to the port control signal.

9. The display driving system according to claim 8, characterized in that: The port control signal includes a first control signal or a second control signal; In the case where the port control signal includes the first control signal, the driving circuit inputs the display data from a first direction and outputs the reconstructed display data from a second direction; In a case where the port control signal includes the second control signal, the driving circuit inputs the display data from the second direction and outputs the reconstructed display data from the first direction.

10. The display driving system according to claim 8, characterized in that: In the case where the drive circuit inputs the display data in a first direction and outputs the display data in a second direction, the drive circuit receives the display data forwarded by the previous drive circuit and forwards the reconstructed display data to the next drive circuit; When the driving circuit inputs the display data from the second direction and outputs the reconstructed display data from the first direction, the driving circuit receives the display data forwarded by the next-stage driving circuit and forwards the reconstructed display data to the previous-stage driving circuit.

11. The display driving system according to any one of claims 8 to 10, characterized in that: The port control signal includes a third control signal or a fourth control signal; In the case where the port control signal includes the third control signal, the driving circuit receives the display data forwarded by the previous driving circuit, and forwards the reconstructed display data to the next and second-stage driving circuits, or receives the display data forwarded by the next driving circuit, and forwards the reconstructed display data to the previous and second-stage driving circuits; In the case where the port control signal includes the fourth control signal, the driving circuit receives the display data forwarded by the previous second-stage driving circuit, and forwards the reconstructed display data to the next-stage and the next-stage driving circuits, or receives the display data forwarded by the next-stage driving circuit, and forwards the reconstructed display data to the previous-stage and the previous second-stage driving circuits; The front second-stage driving circuit is a driving circuit that is separated from the driving circuit by the previous stage driving circuit, and the rear second-stage driving circuit is a driving circuit that is separated from the driving circuit by the next stage driving circuit.

12. The display driving system according to claim 11, characterized in that: Each of the driving circuits comprises a first port, a second port, a third port and a fourth port; The second port of each driving circuit is electrically connected to the first port of the next-stage driving circuit, and the fourth port of each driving circuit is electrically connected to the third port of the next-stage driving circuit; In the case where the port control signal includes the first control signal and the third control signal, the driving circuit receives the display data forwarded by the second port of the previous stage driving circuit through the first port, forwards the reconstructed display data to the first port of the next stage driving circuit through the second port, and forwards the reconstructed display data to the third port of the next second stage driving circuit through the fourth port; In the case where the port control signal includes the first control signal and the fourth control signal, the driving circuit receives the display data forwarded by the fourth port of the previous second-stage driving circuit through the third port, forwards the reconstructed display data to the first port of the next-stage driving circuit through the second port, and forwards the reconstructed display data to the third port of the next-stage driving circuit through the fourth port; In the case where the port control signal includes the second control signal and the third control signal, the driving circuit receives the display data forwarded by the first port of the next-stage driving circuit through the second port, forwards the reconstructed display data to the second port of the previous-stage driving circuit through the first port, and forwards the reconstructed display data to the fourth port of the previous second-stage driving circuit through the third port; In the case where the port control signal includes the second control signal and the fourth control signal, the driving circuit receives the display data forwarded by the third port of the rear second-stage driving circuit through the fourth port, forwards the reconstructed display data to the second port of the previous stage driving circuit through the first port, and forwards the reconstructed display data to the fourth port of the front second-stage driving circuit through the third port; Wherein, the first port, the second port, the third port and the fourth port are all three-state input and output ports; In the case that the driving circuit does not have a next-stage or a second-stage driving circuit, the output data is sent to a data sending circuit, and the data sending circuit is used to send display data to the display driving system.

13. The display driving system according to claim 1, characterized in that: Each set of the image data includes 48 bits of RGB data, and the 48 bits of data in each set of the image data include at least 1 bit of data to represent binary data “0”.

14. The display driving system according to any one of claims 1 to 10 and 13, characterized in that: The display driving system is applied in a display system to drive at least one pixel unit in the display system.

15. A display panel, characterized in that: The display panel comprises a display driving system as described in any one of claims 1-14.

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