CN116052582A - Display driving system and display panel - Google Patents
Display driving system and display panel Download PDFInfo
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- CN116052582A CN116052582A CN202211635431.6A CN202211635431A CN116052582A CN 116052582 A CN116052582 A CN 116052582A CN 202211635431 A CN202211635431 A CN 202211635431A CN 116052582 A CN116052582 A CN 116052582A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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Abstract
The present disclosure relates to a display driving system and a display panel, the display driving system including a plurality of cascaded driving circuits; each driving circuit decodes the received display data, stores a first group of image data in the display data, drives a pixel unit corresponding to the driving circuit according to the stored image data, and forwards the reconstructed display data to a next driving circuit by adjusting the display data; and 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 the display panel provided by the disclosure regenerate the display data before each driving circuit forwards the image data, so that the attenuation of the data signal is reduced, and the long-distance transmission is realized. Meanwhile, the display device provided by the disclosure increases the control data before the first group of image data in the display data, so that the probability that the first group of image data is interfered by noise and burrs is reduced.
Description
Technical Field
The disclosure relates to the field of display devices, and in particular, to a display driving system and a display panel.
Background
Currently, a driving integrated circuit inside a display device generally includes a plurality of cascaded LED driving circuits, and the display device drives the plurality of cascaded LED driving circuits through display data, so as to achieve the purpose of driving and controlling the display states of each LED pixel unit in the display device according to the display data.
However, the display data generally includes multiple sets of image data, and if the image data in the first set has a glitch phenomenon during the transmission process, the display data is likely to be misread, so that the corresponding LED driving circuit cannot generate a correct driving signal to drive the LED pixel unit. In addition, due to factors such as process processing inconsistency and application environment change of the driving integrated circuit, pulse width is gradually distorted in the transmission process of display data, so that the problem that the pulse of the display data cannot represent data information carried by the display data under the condition that the number of cascaded LED driving circuits is large in the driving integrated circuit can occur, and the data transmission is limited by the number of the cascaded LED driving circuits, so that infinite cascade cannot be realized.
Therefore, how to reduce the probability of noise and glitch interference of image data and to ensure the unchanged pulse width of display data on the premise of ensuring that the driving integrated circuit can work normally becomes a technical problem to be solved.
Disclosure of Invention
In view of this, the present disclosure proposes a display driving system and a display panel.
According to an aspect of the present disclosure, there is provided a display driving system including a plurality of cascaded driving circuits; each driving circuit decodes the received display data, stores a first group 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 a next-stage driving circuit by adjusting the display data; and the driving circuit determines the working mode of the driving circuit according to the decoding result of the control data in the display data.
Further, the display data includes control data and a plurality of sets of image data, and the reconstructed display data includes control signals and other sets of image data which are not stored by the driving circuit among the input display data.
Further, the driving circuit determines the working mode of the driving circuit according to the continuous number of preset data from the first bit data of the decoding result of the control data.
Further, the binary data 1 is the preset data, or in a transmission period of 1-bit data in the display data, when a ratio of a duration of a high level to a duration of a low level received by the input port of the driving circuit is equal to a preset ratio, the data received by the driving circuit is the preset data.
Further, starting from the first bit data of the decoding result of the control data, and controlling the driving circuit to execute a first working mode under the condition that the continuous number of the preset data is within a first preset numerical range; controlling the driving circuit to execute a second working mode under the condition that the continuous number of the preset data is in a second preset numerical range; controlling the driving circuit to execute a third working mode under the condition that the continuous number of the preset data is in a third preset numerical range; controlling the driving circuit to execute a fourth working mode under the condition that the continuous number of the preset data is in a fourth preset numerical range; controlling the driving circuit to execute a fifth working mode under the condition that the continuous number of the preset data is in a fifth preset numerical range; and controlling the driving circuit to execute a sixth working mode under the condition that the continuous number of the preset data is in a sixth preset numerical range.
Further, 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 resetting of a data memory in the driving circuit; the third working mode is to control a current output module in the driving circuit to be in a conducting state within a preset time; the fourth operation 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 part.
Further, 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 decoded display data, wherein 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 display data, and forwards the reconstructed display data to a next-stage driving circuit through a port of the driving circuit. Further, the driving circuit further includes: a PWM generator; the PWM generator outputs PWM signals according to the decoding result of the first group of image data, and the PWM signals are used for driving corresponding LED pixel units.
Further, the driving circuit further comprises an input detector; the input detector generates a port control signal according to the level of each port input by the driving circuit, and the driving circuit determines an input port of display data and an output port of the display data according to the port control signal.
Further, the port control signal includes a first control signal or a second control signal; in the case that the port control signal includes a 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 the case where the port control signal includes a second control signal, the driving circuit inputs the display data from a second direction and outputs the reconstructed display data from the first direction.
Further, under the condition that the driving circuit inputs the display data in a first direction and outputs the display data in a second direction, the driving circuit receives the display data forwarded by the previous driving circuit and forwards the reconstructed display data to the next driving circuit; and under the condition that the driving circuit inputs the display data in the second direction and outputs the reconstructed display data in 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.
Further, the port control signal includes a third control signal or a fourth control signal; when the port control signal comprises a third control signal, the driving circuit receives the display data forwarded by the upper driving circuit and forwards the reconstructed display data to the lower driving circuit and the rear second driving circuit, or receives the display data forwarded by the lower driving circuit and forwards the reconstructed display data to the upper driving circuit and the front second driving circuit; when the port control signal comprises a fourth control signal, the driving circuit receives the display data forwarded by the front second-stage driving circuit and forwards the reconstructed display data to the next stage and the rear second-stage driving circuit, or receives the display data forwarded by the rear second-stage driving circuit and forwards the reconstructed display data to the previous stage and the front second-stage driving circuit; the front second-stage driving circuit is a driving circuit which is separated from the driving circuit by the upper-stage driving circuit, and the rear second-stage driving circuit is a driving circuit which is separated from the driving circuit by the lower-stage driving circuit.
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 with the first port of the next-stage driving circuit, and the fourth port of each driving circuit is electrically connected with the third port of the rear second-stage driving circuit; when the port control signal comprises a first control signal and the third control signal, the driving circuit receives display data forwarded by a second port of a previous driving circuit through the first port, forwards reconstructed display data to a first port of a next driving circuit through the second port, and forwards reconstructed display data to a third port of a subsequent second driving circuit through the fourth port; in the case that the port control signal includes a first control signal and the fourth control signal, the driving circuit receives display data forwarded by a fourth port of a previous second stage driving circuit through the third port, forwards reconstructed display data to a first port of a next stage driving circuit through the second port, and forwards reconstructed display data to a third port of a subsequent second stage driving circuit through the fourth port; when the port control signal comprises a second control signal and the third control signal, the driving circuit receives display data forwarded by a first port of a next-stage driving circuit through the second port, forwards the reconstructed display data to a second port of a previous-stage driving circuit through the first port, and forwards the reconstructed display data to a fourth port of a previous second-stage driving circuit through the third port; when the port control signal comprises a second control signal and the fourth control signal, the driving circuit receives display data forwarded by a third port of the rear second-stage driving circuit through the fourth port, forwards the reconstructed display data to a second port of the upper-stage driving circuit through the first port, and forwards the reconstructed display data to a 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 tri-state input/output ports; and in the case that the driving circuit does not exist in the next stage or the second stage, the output data is sent to a data sending circuit, and the data sending circuit is used for sending display data to the display driving system.
Further, 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 includes at least 1 bit of data to represent binary data "0".
Further, the display driving system is applied to a display system and is used for driving at least one pixel unit in the display system.
According to another aspect of the present disclosure, there is also provided a display panel including the display driving system of any one of the preceding claims.
According to the display driving system and the display panel, before each driving circuit forwards display data, the data are regenerated, so that attenuation of data signals is reduced, and long-distance transmission is realized. Meanwhile, the display device provided by the disclosure increases the control data before the first group of image data in the display data, so that the probability that the first group of image data is interfered by noise and burrs is reduced, 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 that the purpose of switching the working mode of the driving circuit is realized, the control of the driving circuit is enriched, and the display effect is enhanced.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic circuit diagram of a display driving system provided in the present disclosure.
Fig. 2 is a schematic diagram showing a data transmission process.
Fig. 3 is a schematic structural diagram of display data provided in the present disclosure.
Fig. 4 is a table for comparing the continuous numbers of the operation modes and the preset data according to the embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a driving circuit according to an embodiment of the disclosure.
Fig. 6 is a coding diagram of display data provided in an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of another driving circuit according to an embodiment of the disclosure.
Fig. 8 is a schematic circuit diagram of another display system according to an embodiment of the disclosure.
Fig. 9 is a schematic diagram of a display data transmission process when a second driving circuit fails in the circuit of the display driving system provided in fig. 8.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
In addition, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order not to obscure the present disclosure.
Referring to fig. 1-3, the present disclosure provides a display driving system including a plurality of cascaded driving circuits 12.
Referring to fig. 1-3, each driving circuit 12 decodes the input display DATA, stores a first set of image DATA (such as the image DATA indicated by DATA1 shown in fig. 3) in the input display DATA, and drives the LED pixel unit corresponding to the driving circuit according to the stored image DATA.
Further, the driving circuit 12 reconstructs the display data and forwards the reconstructed display data to the next driving circuit. The driving circuit 12 determines an operation mode of the driving circuit based on a decoding result of control data in the display data.
The display driving system provided by the disclosure regenerates the data before each driving circuit forwards the display data, so that the attenuation of the data signal is reduced, and the long-distance transmission is realized. Meanwhile, the display device provided by the disclosure increases the control data before the first group of image data in the display data, so that the probability that the first group of image data is interfered by noise and burrs is reduced, 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 that the purpose of switching the working mode of the driving circuit is realized, the control of the driving circuit is enriched, and the display effect is enhanced.
Referring to fig. 1, in one possible embodiment, a plurality of cascaded driving circuits 12 are electrically connected to the data transmission circuit. The data transmitting circuit 11 is electrically connected to the head ends and the tail ends of the plurality of cascaded driving circuits 12 through the P1 port, and the first port Di of each stage of driving circuit except the head stage of driving circuit is electrically connected to the second port Do of the previous stage of driving circuit. The first-stage driving circuit is used for receiving the display data sent by the port of the data sending circuit P1 through the first port Di, and each-stage driving circuit except the first-stage driving circuit receives the display data forwarded by the second port Do of the previous-stage driving circuit through the first port Di.
Further, the data transmitting circuit 11 transmits the display data to the first port Di of the first-stage driving circuit through the P1 port, the first-stage driving circuit decodes the display data, determines the current operation mode according to the decoding result, and stores a first set of image data in the display data, wherein the image data is used for driving the LED pixel unit corresponding to the driving circuit. The first-stage driving circuit rebuilds display data through a local clock in the driving circuit and forwards the rebuilt display data to the next-stage driving circuit, wherein the display data comprises control data and a plurality of groups of image data, and the rebuilt display data comprises control signals and other groups of image data which are not stored. The working principle of the other driving circuits is the same as that of the first-stage driving circuit, so that the description is omitted here.
Further, 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 driving circuit of the previous stage through the first port Di, and at the same time, the second port Do is electrically connected to the data transmitting circuit 11.
The display driving system provided by the disclosure regenerates the data before each driving circuit forwards the display data, so that the attenuation of the data signal is reduced, and the long-distance transmission is realized. Meanwhile, the local clock can be used for quickly regenerating data, so that the time required by the data regeneration process is reduced, the time required by long-distance transmission is reduced, and the transmission at a longer distance can be realized. In addition, the display device provided by the disclosure increases the control data before the first group of image data in the display data, so that the probability that the first group of image data is interfered by noise and burrs is reduced, 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 that the purpose of switching the working mode of the driving circuit is realized, the control of the driving circuit is enriched, and the display effect is enhanced.
Referring to fig. 1-3, in some embodiments of the present disclosure, the driving circuit 12 determines the operation mode of the driving circuit 12 according to the first data of the decoding result of the control data, and the continuous number of preset data.
Optionally, the preset data is binary data 1, and may also be binary data 0, which is not limited in this disclosure.
Alternatively, it may be determined whether the data currently input to the driving circuit 12 is preset data by measuring a voltage variation of the input port of the driving circuit 12.
For example, in a transmission period of 1-bit data in the display data, in a case where a ratio of a duration of a high level to a duration of a low level received by the input port of the driving circuit 12 is a preset ratio, the data received by the driving circuit 12 is preset data. Illustratively, the high level is a voltage signal having an input voltage greater than VDD/2 and the low level is a voltage signal having an input voltage less than VDD/2, where VDD is the input voltage to the VDD pin of the driver circuit 12.
For example, taking preset data as binary data "1", as shown in fig. 6, in the case where the duration of the transmission period of 1-bit data in display data is 550ns, the voltage variation with a high level duration of 330ns and a low level duration of 220ns represents binary data "1", the preset ratio should be set to 3/2.
For example, taking preset data as binary data "0", as shown in fig. 6, in the case that the duration of a transmission period of 1-bit data in display data is 550ns, the voltage variation with a high level duration of 110ns and a low level duration of 440ns represents binary data "0", the preset ratio should be set to 1/4.
Illustratively, in the case where the duration of the transmission period of 1-bit data in the display data is 550ns, the value of the high-level duration is greater than 220ns, alternatively 330ns, and the value of the low-level duration is greater than 110ns in the voltage variation to represent binary data "1". In the case where the duration of the transmission period of 1-bit data in the display data is 550ns, in the voltage variation to represent binary data "0", the value of the high-level duration is greater than 60ns and less than 160ns, optionally 110ns, and the value of the low-level duration is greater than 330ns.
The display data includes, for example, control data and sets of image data.
Optionally, the control data includes 48 bits of start data and 48 bits of adjustable data. Optionally, for convenience of design of a developer, each bit in the initial data in the control data may be used to represent the preset data, that is, in the case that the preset data is binary "1", each bit in the initial data is used to represent binary data "1", and the data represented by each bit in the adjustable data may be set according to the actual situation.
For example, in the case that the preset data is binary data "1", and the consecutive number of "1" s in the display data is greater than 56 and less than 60, the driving circuit can be instructed to be in the second operation mode. At this time, the developer makes the first data to the ninth data (any one of the ninth bit and the eleventh bit) of the adjustable data be used for representing the preset data "1", and makes the twelfth data of the adjustable data be used for representing the non-preset data "1", so as to ensure that the number of data continuously representing the preset data "1" in the display data is greater than 56 and less than 60, and make the driving circuit be in the second working mode.
Alternatively, the set of image data, which may include a portion of the image data in a frame, may be displayed by a corresponding pixel unit on the display panel. For example, each set of image data may include 48 bits of RGB data (each set of image data may also include 36 bits of RGB data or the like), and in the case where the start data in the control data is used to represent 48 bits of preset data (e.g., "1"), in order to prevent the image data from being mistaken as the start data by the driving circuit, the 48 bits of data in each set of image data may include at least 1 bit of data to represent non-preset data (e.g., in the case where the preset data is "1", the non-preset data is "0"). Alternatively, 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 operator is required to change the preset number of data "1" to data 0 in the image data, for example, to set the image data to 47 bits of "1" data and 1 bit of "0" data.
The present disclosure does not limit the number of bits and content of control data, and the number of bits per set of image data.
Compared with 24-bit image data in the prior art, the display driving system provided by the embodiment of the disclosure increases the gray value of 8 bits, so that the display driving system can present richer color images.
In some embodiments provided by the present disclosure, the driving circuit 12 is controlled to execute the first operation mode in a case where the consecutive number of preset data is within the first preset numerical range, starting from the first bit data of the decoding result of the control data in the display data. In case the consecutive number of preset data is within the second preset value range, the driving circuit 12 is controlled to perform the second operation mode. In case the consecutive number of preset data is within a third preset value range, the driving circuit 12 is controlled to perform a third operation mode. In the case where the continuous number of preset data is within the fourth preset numerical range, the driving circuit 12 is controlled to execute the fourth operation mode. In the case where the consecutive number of preset data is within the fifth preset numerical range, the driving circuit 12 is controlled to execute the fifth operation mode. In the case where the continuous number of preset data is within the sixth preset numerical range, the driving circuit 12 is controlled to execute the sixth operation mode. Referring to fig. 1-4, optionally, a first operation mode is to control the driving circuit 12, store a decoding result of the first set of image data, and drive the corresponding LED pixel unit according to the stored decoding result. Accordingly, the first preset data range may be set as the number of bits of the start data in the control data, for example, in the case where the control data is 96 bits (48 bits of start data and 48 bits of adjustable data), the first preset numerical range may be a positive integer greater than 47 and less than or equal to 48. That is, when the drive circuit demodulates the control data and the demodulation result of the 49 th bit of the control data is the non-preset data, the drive circuit 12 enters the first operation mode and starts storing the image data.
Optionally, the second mode of operation is resetting the data memory 123 in the drive circuit 12. Correspondingly, in the case that the control data is 96 bits (48 bits of initial data and 48 bits of adjustable data), the second preset numerical 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, the driving circuit 12 enters the second operation mode 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 the non-preset data, and the driving circuit 12 resets the data memory 123. Illustratively, the data memory 123 in the driving circuit 12 is reset in order to restore the data memory 123 to an initial state.
Optionally, the third operation mode is to control the constant current output module in the driving circuit 12 to be in a conducting state within a preset time. Correspondingly, in the case that the control data is 96 bits (48 bits of initial data and 48 bits of adjustable data), the third preset numerical range is a positive integer greater than or equal to 64 and less than 68. That is, when the driving circuit demodulates the control data, the driving circuit 12 enters the third working mode when the demodulation result of the first 64 bits of the control data is preset data and the demodulation result of the first 68 bits of the control data is non-preset data, that is, the driving circuit controls the constant current output module inside the driving circuit to be in a conducting state in the preset time.
Alternatively, the fourth operation mode is to switch the driving circuit 12 to a standby state in which the analog circuits in the driving circuit 12 are no longer operated, so that the power of the driving circuit can be reduced to the maximum extent, thereby reducing the power consumption of the whole display driving system. Correspondingly, in the case that the control data is 96 bits (48 bits of initial data and 48 bits of adjustable data), the fourth preset numerical range is a positive integer greater than or equal to 68 and less than 72. That is, when the driving circuit demodulates the control data, the driving circuit 12 enters the fourth operation mode, that is, controls the driving circuit 12 to turn off the internal analog circuit 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 the non-preset data.
Optionally, the fifth mode of operation is to activate an analog circuit in the drive circuit 12. Correspondingly, in the case that the control data is 96 bits (48 bits of initial data and 48 bits of adjustable data), the fifth preset numerical range is a positive integer greater than or equal to 32 and less than 48. Correspondingly, when the driving circuit demodulates the control data, the driving circuit 12 enters a fifth working mode, i.e. controls the driving circuit 12 to start an internal analog circuit when the demodulation result of the first 32 bits of the control data is preset data and the demodulation result of the first 48 bits of the control data is non-preset data. At this time, the demodulation result of the start data in the control data includes binary data "0" and binary data "1", and in order to prevent the driving circuit from mistaking the same image data as the start data, the same image data as the start data should not exist in this control data.
Alternatively, the sixth operation mode is to control the driving circuit 12 to execute a test mode, wherein in the test mode, the driving circuit 12 outputs a signal at a preset output unit. Illustratively, the output components include, but are not limited to, output PADs, chip pins, and the like. Correspondingly, in the case that the control data is 96 bits (48 bits of initial data and 48 bits of adjustable data), the sixth preset numerical range is a positive integer greater than or equal to 72. That is, when the driving circuit demodulates the control data, the driving circuit 12 enters the sixth operation mode, that is, controls the driving circuit 12 to execute the test mode, when the demodulation results of the first 72 bits of the control data are all the preset data.
Illustratively, in the third, fourth, and sixth modes of operation, the display panel including the display driving system does not display an image.
For example, referring to fig. 6 and described above, the current operating mode of the driving circuit 12 may be determined based on the voltage change at the input port of the driving circuit 12. Exemplary, the voltage at the input port of the driving circuit 12 is maintained in the preset state for a period of time greater than T 1 M is less than or equal to T 2 M, the driving circuit 12 is controlled to execute the first operation mode. The duration of the voltage at the input port of the driving circuit 12 maintained in the preset state is greater than or equal to T 3 M and less than T 4 M, the driving circuit 12 is controlled to perform the second operation mode. The duration of the voltage at the input port of the driving circuit 12 maintained in the preset state is greater than or equal to T 4 M and less than T 5 M, the driving circuit 12 is controlled to perform the third operation mode. The duration of the voltage at the input port of the driving circuit 12 maintained in the preset state is greater than or equal to T 5 M and less than T 6 M, the driving circuit 12 is controlled to execute the fourth operation mode. The duration of the voltage at the input port of the driving circuit 12 is maintained in the preset state is longer thanOr equal to T 7 M and less than T 2 M, the driving circuit 12 is controlled to execute the fifth operation mode. The duration of the voltage at the input port of the driving circuit 12 maintained in the preset state is greater than or equal to T 6 M, the driving circuit 12 is controlled to execute the sixth operation mode.
The preset state is, for example, a state in which a ratio of a duration of a high level to a duration of a low level received by the input port of the driving circuit 12 is equal to a preset ratio in a transmission period of 1-bit data in the display data, and in this state, the data received by the driving circuit 12 is the preset data.
Alternatively, in the case where the control data includes 96 transmission periods of 1-bit data, the above T 1 M is equal to 47 x 550ns, T 2 M is equal to 48×550ns, i.e. the duration of the input voltage at the input port of the driving circuit 12 is greater than 47×550ns (T 1 M) and less than or equal to 48 x 550ns (T 2 M), the driving circuit 12 is controlled to execute the first operation mode. The duration of the voltage at the input port of the driving circuit 12 to maintain the preset state is greater than or equal to 56×550ns (T 3 M) and less than 64 x 550ns (T 4 M), the driving circuit 12 is controlled to perform the second operation mode. The duration of the voltage at the input port of the driving circuit 12 to maintain the preset state is greater than or equal to 64×550ns (T 4 M) and less than 68 x 550ns (T 5 M), the driving circuit 12 is controlled to execute the third operation mode. The duration of the voltage at the input port of the driving circuit 12 to maintain the preset state is greater than or equal to 68 x 550ns (T 5 M) and less than 72 x 550ns (T 6 M), the driving circuit 12 is controlled to execute the fourth operation mode. The duration of the voltage at the input port of the driving circuit 12 to maintain the preset state is greater than or equal to 32×550ns (T 7 M) and less than 48 x 550ns (T 2 M), the driving circuit 12 is controlled to execute the fifth operation mode. The duration of the voltage at the input port of the driving circuit 12 to maintain the preset state is greater than or equal to 72 x 550ns (T 6 M), the driving circuit 12 is controlled to execute the sixth operation mode. It should be noted that the embodiments of the present disclosure are not limited to the operations performed by the driving circuit in each of the operation modesThe correspondence between the preset numerical range and the operation mode is not limited either. The above values and modes of operation are merely exemplary of the present disclosure.
The display driving system provided by the disclosure reduces the probability that the first group of image data is interfered by noise and burr by adding the control data before the first group of image data in the display data. In addition, a developer can divide different working modes by setting different preset numerical ranges, and the purpose of flexibly adjusting the switching of the working modes of the driving circuit is achieved.
Referring to fig. 5, 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.
Further, the data decoder 122 decodes the display data according to the pulse signal output from the data oscillator 121, and outputs the decoded display data, which is binary data.
Illustratively, referring to FIG. 6, the display data is encoded with a unipolar return-to-zero code. Wherein the minimum period in the display data is T s The high level bit duration of data "0" is T 0 H, low level bit duration T 0 L, high level bit duration of data "1" is T 1 H, low level bit duration T 1 L。
Alternatively, T s The value of (2) is 550ns. High level bit duration T of data "0 0 H has a value of more than 60ns and less than 220ns, T 0 The value of H is 110ns, and the duration of low level bit is T 0 L has a value range of more than 330ns and T 0 The value of L can be selected to be 440 ns. High level bit duration T of data "1 1 H has a value range of more than 220ns and T 1 The value of H is 330ns, and the duration of low level bit is T 1 L has a value of more than 110ns and T 1 The value of L can be 220ns.
Further, the data memory 123 stores the first set of image data in the decoding result, and the data regenerator 124 obtains the control data not stored by 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 stage driving circuit 12 through the port of the driving circuit 12.
Further, the driving circuit 12 further includes: a PWM generator. The PWM generator outputs PWM signals according to the decoding result of the first group of image data, and the PWM signals are used for driving the corresponding LED pixel units so as to display the stored first group of image data.
The display driving system provided by the disclosure regenerates the data before each driving circuit forwards the display data, so that the attenuation of the data signal is reduced, and the long-distance transmission is realized. Meanwhile, the local clock can be used for quickly regenerating data, so that the time required by the data regeneration process is reduced, the time required by long-distance transmission is reduced, and the transmission at a longer distance can be realized. In addition, the display device provided by the disclosure increases the control data before the first group of image data in the display data, so that the probability that the first group of image data is interfered by noise and burrs is reduced, and the driving circuit in the display driving system can start according to 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 realize the purpose of switching the working mode of the driving circuit.
Referring to fig. 7, in one possible embodiment, the drive circuit 12 further includes an input detector 126. The input detector 126 generates a port control signal according to the level of the input of each port of the driving circuit 12, and the driving circuit 12 determines the input port of the display data and the output port of the display data according to the port control signal.
Illustratively, the first, second, third, and fourth ports Di, do, FA, and FB 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), respectively. The input detector 126 outputs a port control signal according to the input levels 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. The first port Di, the second port Do, the third port FA and the fourth port FB are all tri-state input/output ports.
Illustratively, in the case where the input level of a certain port of the driving circuit 12 is high, 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. Illustratively, the input detector 126 generates the first control signal when the input level of the first port Di or the third port FA is high. When the input level of the second port Do or the fourth port FB is high, the input detector 126 generates a second control signal. The input detector 126 generates a third control signal when the input level of the first port Di is high or the input level of the second port Do is high. The input detector 126 generates a fourth control signal when the input level of the first port Di and the second port Do is low and the input level of the third port FA or the fourth port FB is high. Thus, when the input level of the first port Di is high, the input detector 126 generates the first control signal and the third control signal, and at this time, the driver circuit 12 receives the display data transferred from the previous driver 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 the driving circuit 12 receives the display data transferred by the next driving 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 the driving circuit 12 receives the display data transferred by the previous second driving 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 driving circuit 12 receives the display data forwarded by the second stage driving circuit through the fourth port FB.
Further, the port control signal generated by the input detector 126 includes a first control signal or a second control signal. In the case where the port control signal includes a first control signal, the driving circuit 12 inputs display data from a first direction and outputs reconstructed display data from a second direction.
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.
In an exemplary case where the driving circuit inputs display data from a first direction and outputs reconstructed display data from a second direction, the driving circuit receives the display data forwarded by the previous driving circuit and forwards the reconstructed display data to the next driving circuit. Under the condition that the driving circuit inputs display data from the second direction and outputs 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.
In this way, the data transmitting circuit 11 may simultaneously transmit display data to the front and rear ends of the plurality of cascaded driving circuits 12, and each driving circuit 12 may receive the 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 the display data in the data memory 123, and when driving the LED pixel unit, drive the LED pixel unit according to only 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 stage driving circuit through the first port Di, and forwards the reconstructed display data to the first port Di of the next stage 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 from the first port Di of the next stage driving circuit through the second port Do, and forwards the reconstructed display data to the second port Do of the previous stage driving circuit through the first port Di. Wherein the first port Di and the second port Do of the driving circuit 12 are tri-state input-output ports.
In the display driving system provided by the disclosure, under the condition that a fault driving circuit exists in the display driving system, although the next-stage driving circuit 12 of the fault circuit cannot acquire display data from the first port Di, the next-stage driving circuit 12 still can receive the display data forwarded by the first port Di of the next-stage driving circuit 12 through the second port Do, so that the occurrence of the condition of full-screen display is prevented from being influenced due to the damage of one driving circuit in the display driving system.
Referring to fig. 7, in one possible implementation, the port control signal generated by the input detector 126 includes a third control signal or a fourth control signal.
Further, in the case where the port control signal includes the third control signal, the driving circuit 12 receives the display data forwarded by the previous driving circuit and forwards the reconstructed display data to the next and subsequent second driving circuits, or receives the display data forwarded by the next driving circuit and forwards the reconstructed display data to the previous and previous second driving circuits.
Further, in the case where the port control signal includes the fourth control signal, the driving circuit 12 receives the display data forwarded by the preceding second-stage driving circuit and forwards the reconstructed display data to the next-stage and following second-stage driving circuits, or receives the display data forwarded by the following second-stage driving circuit and forwards the reconstructed display data to the previous-stage and preceding second-stage driving circuits.
Equivalently, each stage of driving circuit is electrically connected with the previous stage of driving circuit and the previous second stage of driving circuit except the first stage of driving circuit.
Illustratively, in the case where the data transmitting circuit 11 transmits display data to the first port Di of the first stage driving circuit through the P1 port and transmits display data to the third port FA of the next stage driving circuit of the first stage driving circuit through the P1D port, the first port Di of the driving circuit 12 is used to receive display data forwarded by the previous stage driving circuit, the second port Do of the driving circuit is used to forward display data, the third port FA of the driving circuit 12 is used to receive display data forwarded by the previous second stage driving circuit, and the fourth port FB of the driving circuit 12 is used to forward display data to the third port FA of the subsequent second stage driving circuit.
Illustratively, in the case where the data transmission circuit 11 transmits the display data to the second port Do of the final stage driving circuit through the N1 port and transmits the display data to the fourth port FB of the previous stage driving circuit of the final stage driving circuit through the N1D port. The second port Do of the driving circuit 12 is used for receiving the display data forwarded by the driving circuit of the next stage, the first port Di of the driving circuit 12 is used for forwarding the display data, the third port FA of the driving circuit 12 is used for forwarding the display data to the fourth port FB of the driving circuit of the previous second stage, and the fourth port FB of the driving circuit 12 is used for receiving the display data forwarded by the driving circuit of the subsequent second stage.
Illustratively, the front second stage drive circuit is a drive circuit that is spaced from the drive circuit by a first stage drive circuit, and the rear second stage drive circuit is a drive circuit that is spaced from the drive circuit by a second stage drive circuit. In fig. 8, the driving circuit 91 is a front second stage driving circuit of the driving circuit 93, and the driving circuit 93 is a rear second stage driving circuit of the driving circuit 91.
Alternatively, in the case where there is no faulty driving circuit among the plurality of cascaded driving circuits 12, the driving circuit obtains the display data forwarded by the second port Do of the driving circuit of the previous stage thereof through the first port Di.
Optionally, in the case that there is a faulty driving circuit in the plurality of cascaded driving circuits 12, the driving circuit of the next stage of the faulty driving circuit obtains the display data forwarded by the fourth port FB of the driving circuit of the previous stage of the faulty driving circuit through the third port FA. Optionally, the next stage driving circuit of the fault driving circuit may also obtain, through the fourth port FB, display data forwarded by the fourth port FA of the previous stage driving circuit of the fault driving circuit.
Referring to fig. 8 to 9, in the case where the second driving circuit 92 is a fault circuit, the third driving circuit 93 obtains display data forwarded by the first driving circuit 91 through the third port FA, stores image data located in the first group in the display data, and reconstructs the display data, wherein the reconstructed display data includes control data and the remaining image data. The third driving circuit 93 decodes the reconstructed display data, judges the start of the first bit data of the decoding result, presets the continuous number of data, and determines the operation mode of the third driving circuit 93.
Further, as shown in fig. 8, the second port Do and the fourth port FB of the second driving circuit 92 fail, so the second port Do and the fourth port FB of the second driving circuit 92 cannot output the display data s3 and p3.
The driving circuit in the display driving system provided by the disclosure not only can obtain the display data forwarded by the driving circuit of the upper stage, but also can obtain the display data forwarded by the driving circuit of the front second stage, which is equivalent to the fact that the driving circuit can obtain the display data received and forwarded by the driving circuit of the upper stage, thereby realizing breakpoint transmission and preventing the problem that the driving circuit connected in series with the single driving circuit cannot work due to the damage of the single driving circuit in the display driving system.
Referring to fig. 8, in one possible embodiment, each of the driving circuits includes a first port Di, a second port Do, a third port FA, and a fourth port FB.
Further, the second port Do of each driving circuit is electrically connected to the first port Di of the next driving circuit, and the fourth port FB of each driving circuit is electrically connected to the third port FA of the second driving circuit.
In an exemplary case where the port control signal includes a first control signal and a third control signal, the driving circuit receives the display data forwarded by the second port Do of the previous driving circuit through the first port Di, forwards the reconstructed display data to the first port Di of the next driving circuit through the second port Do, and forwards the reconstructed display data to the third port FA of the subsequent second driving circuit through the fourth port FB.
In an exemplary 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 FB of the previous 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 subsequent second stage driving circuit through the fourth port FB.
In an exemplary 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 Di of the next stage driving circuit through the second port Do, 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 previous second stage driving circuit through the third port FA.
In an exemplary 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 FA of the 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 previous-stage driving circuit through the third port FA.
Illustratively, the second-stage driver circuit preceding the driver circuit is a driver circuit spaced from the driver circuit by a first-stage driver circuit, and the second-stage driver circuit following the driver circuit is a driver circuit spaced from the driver circuit by a second-stage driver circuit.
For example, in the case where the driving circuit does not have the next stage or the second stage after that, the output data is transmitted to the data transmitting circuit for transmitting the display data to the display driving system.
In some embodiments of the present disclosure, the present disclosure also provides a display panel including the display driving system described previously.
The display panel provided by the present disclosure is one 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.
The display panel provided by the disclosure reduces the probability that the first group of image data is interfered by noise and burr by adding the control data before the first group of image data in the display data. In addition, a developer can divide different working modes by setting different preset numerical ranges, and the purpose of flexibly adjusting the switching of the working modes of the driving circuit is achieved.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (16)
1. A display drive system, the display drive system comprising a plurality of cascaded drive circuits;
each driving circuit decodes the received display data, stores a first group 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 a next-stage driving circuit by adjusting the display data;
and the driving circuit determines the working mode of the driving circuit according to the decoding result of the control data in the display data.
2. The display drive system according to claim 1, wherein the display data includes control data and a plurality of sets of image data, and the reconstructed display data includes control signals and other sets of image data among the input display data that are not stored by the drive circuit.
3. The display driving system according to claim 1, wherein the driving circuit determines the operation mode of the driving circuit according to a continuous number of preset data from a first bit data of a decoding result of the control data.
4. A display driving system according to claim 3, wherein binary data 1 is the preset data, or the data received by the driving circuit is the preset data in the case that the ratio of the duration of the high level to the duration of the low level received by the input port of the driving circuit is equal to a preset ratio in a transmission period of 1-bit data in the display data.
5. The display driving system according to claim 1, wherein, starting from the first bit data of the decoding result of the control data,
controlling the driving circuit to execute a first working mode under the condition that the continuous number of the preset data is in a first preset numerical range;
Controlling the driving circuit to execute a second working mode under the condition that the continuous number of the preset data is in a second preset numerical range;
controlling the driving circuit to execute a third working mode under the condition that the continuous number of the preset data is in a third preset numerical range;
controlling the driving circuit to execute a fourth working mode under the condition that the continuous number of the preset data is in a fourth preset numerical range;
controlling the driving circuit to execute a fifth working mode under the condition that the continuous number of the preset data is in a fifth preset numerical range;
and controlling the driving circuit to execute a sixth working mode under the condition that the continuous number of the preset data is in a sixth preset numerical range.
6. The display drive system according to claim 1, wherein the first operation mode is to control the driving circuit, store a decoding result of the first set of image data, and drive the corresponding LED pixel unit according to the stored decoding result;
the second working mode is resetting of a data memory in the driving circuit;
the third working mode is to control a current output module in the driving circuit to be in a conducting state within a preset time;
The fourth operation 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 part.
7. The display drive system according to claim 1, wherein the drive circuit comprises: 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 decoded display data, wherein 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 display data, and forwards the reconstructed display data to a next-stage driving circuit through a port of the driving circuit.
8. The display drive system according to claim 1, wherein the drive circuit further comprises: a PWM generator;
The PWM generator outputs PWM signals according to the decoding result of the first group of image data, and the PWM signals are used for driving corresponding LED pixel units.
9. The display drive system of claim 1, wherein the drive circuit further comprises an input detector;
the input detector generates a port control signal according to the level of each port input by the driving circuit, and the driving circuit determines an input port of display data and an output port of the display data according to the port control signal.
10. The display drive system of claim 9, wherein the port control signal comprises a first control signal or a second control signal;
in the case that the port control signal includes a 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 the case where the port control signal includes a second control signal, the driving circuit inputs the display data from a second direction and outputs the reconstructed display data from the first direction.
11. The display drive system according to claim 9, wherein 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 a previous drive circuit and forwards the reconstructed display data to a next drive circuit;
And under the condition that the driving circuit inputs the display data in the second direction and outputs the reconstructed display data in 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.
12. The display-driving system according to any one of claims 9 to 11, wherein the port control signal includes a third control signal or a fourth control signal;
when the port control signal comprises a third control signal, the driving circuit receives the display data forwarded by the upper driving circuit and forwards the reconstructed display data to the lower driving circuit and the rear second driving circuit, or receives the display data forwarded by the lower driving circuit and forwards the reconstructed display data to the upper driving circuit and the front second driving circuit;
when the port control signal comprises a fourth control signal, the driving circuit receives the display data forwarded by the front second-stage driving circuit and forwards the reconstructed display data to the next stage and the rear second-stage driving circuit, or receives the display data forwarded by the rear second-stage driving circuit and forwards the reconstructed display data to the previous stage and the front second-stage driving circuit;
The front second-stage driving circuit is a driving circuit which is separated from the driving circuit by the upper-stage driving circuit, and the rear second-stage driving circuit is a driving circuit which is separated from the driving circuit by the lower-stage driving circuit.
13. The display drive system according to claim 12, wherein each of the drive 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 with the first port of the next-stage driving circuit, and the fourth port of each driving circuit is electrically connected with the third port of the rear second-stage driving circuit;
when the port control signal comprises a first control signal and the third control signal, the driving circuit receives display data forwarded by a second port of a previous driving circuit through the first port, forwards reconstructed display data to a first port of a next driving circuit through the second port, and forwards reconstructed display data to a third port of a subsequent second driving circuit through the fourth port;
in the case that the port control signal includes a first control signal and the fourth control signal, the driving circuit receives display data forwarded by a fourth port of a previous second stage driving circuit through the third port, forwards reconstructed display data to a first port of a next stage driving circuit through the second port, and forwards reconstructed display data to a third port of a subsequent second stage driving circuit through the fourth port;
When the port control signal comprises a second control signal and the third control signal, the driving circuit receives display data forwarded by a first port of a next-stage driving circuit through the second port, forwards the reconstructed display data to a second port of a previous-stage driving circuit through the first port, and forwards the reconstructed display data to a fourth port of a previous second-stage driving circuit through the third port;
when the port control signal comprises a second control signal and the fourth control signal, the driving circuit receives display data forwarded by a third port of the rear second-stage driving circuit through the fourth port, forwards the reconstructed display data to a second port of the upper-stage driving circuit through the first port, and forwards the reconstructed display data to a 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 tri-state input/output ports;
and in the case that the driving circuit does not exist in the next stage or the second stage, the output data is sent to a data sending circuit, and the data sending circuit is used for sending display data to the display driving system.
14. The display drive system according to claim 1, wherein each set of the image data includes 48 bits of RGB data, and 48 bits of data in each set of the image data includes at least 1 bit of data to represent binary data "0".
15. A display driving system according to any one of claims 1 to 14, wherein the display driving system is applied in a display system for driving at least one pixel unit in the display system.
16. A display panel comprising a display driving system according to any of claims 1-15.
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|---|---|---|---|
| CN202210001692.6A CN114299844A (en) | 2022-01-04 | 2022-01-04 | Display driving system and display panel |
| CN2022100016926 | 2022-01-04 |
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| CN116052582A true CN116052582A (en) | 2023-05-02 |
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| CN202210001692.6A Pending CN114299844A (en) | 2022-01-04 | 2022-01-04 | Display driving system and display panel |
| CN202211635431.6A Pending CN116052582A (en) | 2022-01-04 | 2022-12-19 | Display driving system and display panel |
| CN202211634777.4A Pending CN115798398A (en) | 2022-01-04 | 2022-12-19 | Display driving system and display panel |
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| CN115100998B (en) * | 2022-08-24 | 2022-11-15 | 成都利普芯微电子有限公司 | Drive circuit, drive IC, drive equipment and display equipment |
| CN117746802A (en) * | 2023-11-27 | 2024-03-22 | 北京显芯科技有限公司 | Method for controlling instruction transmission, dimmer and backlight unit |
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- 2022-01-04 CN CN202210001692.6A patent/CN114299844A/en active Pending
- 2022-12-19 CN CN202211635431.6A patent/CN116052582A/en active Pending
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| CN114299844A (en) | 2022-04-08 |
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