CN108022546B - Signal compensation method, device and system, source electrode driving chip and storage medium - Google Patents
Signal compensation method, device and system, source electrode driving chip and storage medium Download PDFInfo
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Abstract
The invention discloses a signal compensation method, a signal compensation device, a signal compensation system, a source electrode driving chip and a storage medium, and belongs to the technical field of display. The signal compensation method is applied to a source electrode driving chip, and comprises the following steps: receiving a data signal sent by a time schedule controller; detecting whether the amplitude of the data signal is smaller than that of the reference signal; and when the amplitude of the data signal is smaller than that of the reference signal, sending a first feedback signal to a time schedule controller, wherein the first feedback signal is used for indicating the time schedule controller to carry out signal compensation operation on the data signal to be sent and then sending the data signal. The invention effectively improves the efficiency of the signal compensation method.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a signal compensation method, device, and system, a source driver chip, and a storage medium.
Background
The display device may generally include a display panel and a panel driving circuit for driving the display panel, and the panel driving circuit may include a timing controller (T/CON), a gate driving circuit and a source driving circuit, wherein the source driving circuit may include a plurality of source driver chips. In the panel driving process, the timing controller and the source driver chip generally use a point-to-point interface technology to transmit data signals.
In the panel driving process, especially when long-distance transmission of data signals is performed, signal attenuation is very serious, and usually, the data signals transmitted to the source driving chips at different positions need to be reinforced and compensated to different degrees in the timing controller so as to avoid distortion of the data signals transmitted to the corresponding source driving chips.
At present, an oscilloscope is generally adopted to acquire an eye pattern of a data signal transmitted to a source driving chip, a method of manually observing the eye pattern is adopted to judge whether the data signal meets requirements, and then the data signal which does not meet the requirements is compensated by a method of manually adjusting circuit parameters, however, the efficiency of the signal compensation method is low.
Disclosure of Invention
The invention provides a signal compensation method, a device and a system, a source electrode driving chip and a storage medium, which can solve the problem of low efficiency of the signal compensation method in the related technology. The technical scheme is as follows:
in a first aspect, a signal compensation method is provided, where the method is applied to a source driver chip, and the method includes:
receiving a data signal sent by a timing controller;
detecting whether the amplitude of the data signal is smaller than that of the reference signal;
and when the amplitude of the data signal is smaller than that of the reference signal, sending a first feedback signal to a time schedule controller, wherein the first feedback signal is used for indicating the time schedule controller to carry out signal compensation operation on the data signal to be sent and then sending the data signal.
Optionally, when the amplitude of the data signal is smaller than the amplitude of the reference signal, the method further includes:
judging whether the data signal is a signal on which a signal compensation operation has been performed;
the sending a first feedback signal to a timing controller includes:
transmitting the first feedback signal to the timing controller when the data signal is a signal on which a compensation operation is not performed;
the method further comprises the following steps:
and when the data signal is a signal on which a signal compensation operation has been performed, transmitting a second feedback signal to the timing controller, the second feedback signal being used to instruct the timing controller to stop transmitting the data signal.
Optionally, after the detecting whether the amplitude of the data signal is smaller than the amplitude of the reference signal, the method further includes:
and when the amplitude of the data signal is not less than that of the reference signal, sending a third feedback signal to the time sequence controller, wherein the third feedback signal is used for indicating the time sequence controller to send the data signal to be sent.
In a second aspect, a signal compensation method is provided, the method is applied to a timing controller, and the method includes:
sending a data signal to a source electrode driving chip;
receiving a first feedback signal sent by the source driving chip, wherein the first feedback signal is sent by the source driving chip when the source driving chip detects that the amplitude of the data signal is smaller than the amplitude of the reference signal;
according to the first feedback signal, performing signal compensation operation on a data signal to be transmitted;
and sending the data signal to be sent after the signal compensation operation is executed to the source electrode driving chip.
In a third aspect, there is provided a signal compensation apparatus, the apparatus being disposed in a source driver chip, the apparatus including:
the receiving module is used for receiving the data signals sent by the time schedule controller;
the detection module is used for detecting the amplitude of the data signal;
and the first sending module is used for sending a first feedback signal to the time schedule controller when the amplitude of the data signal is smaller than that of the reference signal, and the first feedback signal is used for indicating the time schedule controller to send the data signal to be sent after signal compensation operation is carried out on the data signal.
In a fourth aspect, there is provided an apparatus provided in a timing controller, the apparatus comprising:
the sending module is used for sending a data signal to the source electrode driving chip;
the receiving module is used for receiving a first feedback signal sent by the source driving chip, wherein the first feedback signal is sent by the source driving chip when the amplitude of the data signal is detected to be smaller than the amplitude of the reference signal;
the compensation module is used for executing signal compensation operation on the data signal to be transmitted according to the first feedback signal;
the sending module is further configured to send the data signal to be sent after the signal compensation operation is performed to the source driver chip.
In a fifth aspect, a source driving chip is provided, which includes: a switching device and a processor;
the processor is connected with the signal input end of the switching device and used for detecting whether the amplitude of the received data signal is smaller than that of the reference signal or not and inputting a corresponding feedback signal to the signal input end of the switching device based on the detection result;
the control end of the switch device is connected with the control signal end, the signal output end of the switch device is connected with the input end of the time sequence controller, and the switch device is used for inputting the feedback signal to the time sequence controller when the electric potential of the control signal output by the control signal end is a first electric potential.
Optionally, the source driving chip further includes: a pull-up resistor;
one end of the pull-up resistor is connected with the input end of the time schedule controller, the other end of the pull-up resistor is grounded, and the pull-up resistor is used for inputting a feedback signal at a preset potential to the time schedule controller when the potential of the control signal is a second potential.
In a sixth aspect, there is provided a signal compensation system comprising: a source driving chip and a time schedule controller;
the source driving chip is used for executing the signal compensation method according to any one of the first aspect;
the timing controller is configured to perform the signal compensation method according to the second aspect.
A seventh aspect provides a storage medium having stored therein instructions that, when run on a processing component, cause the processing component to perform the signal compensation method according to any one of the first aspect; alternatively, the processing component is caused to perform the signal compensation method according to the second aspect.
The technical scheme provided by the invention has the beneficial effects that:
according to the signal compensation method, the signal compensation device and the signal compensation system, the source electrode driving chip and the storage medium, whether the amplitude of the data signal is smaller than that of the reference signal or not is detected, and when the amplitude of the data signal is smaller than that of the reference signal, the first feedback signal is sent to the time schedule controller.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1A is a schematic structural diagram of a signal compensation system according to an embodiment of the present invention;
fig. 1B is a schematic diagram illustrating a connection manner between a timing controller and a source driver chip according to an embodiment of the invention;
FIG. 2 is a flow chart of a signal compensation method according to an embodiment of the present invention;
FIG. 3 is a flow chart of another signal compensation method provided by the embodiment of the invention;
FIG. 4 is a flow chart of another signal compensation method according to an embodiment of the present invention;
fig. 5 is a schematic waveform diagram of a received data signal and a reference signal according to an embodiment of the present invention;
fig. 6A is a schematic structural diagram of a signal compensation apparatus according to an embodiment of the present invention;
fig. 6B is a schematic structural diagram of another signal compensation apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another signal compensation apparatus according to an embodiment of the present invention;
FIG. 8A is a schematic diagram of a source driver chip according to an embodiment of the present invention;
fig. 8B is a schematic structural diagram of another source driver chip according to an embodiment of the invention;
FIG. 9 is a schematic diagram of a structure of another source driver chip according to an embodiment of the present invention;
fig. 10 is a schematic diagram of an operation timing sequence of a source driver chip according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a signal compensation system, as shown in fig. 1A, the signal compensation system may include: a timing controller 110 and a plurality of source driving chips 120, the timing controller 110 being connected to the plurality of source driving chips 120 through a plurality of signal lines, respectively.
Each source driver chip 120 is configured to receive a data signal sent by the timing controller 110, detect an amplitude of the data signal, and send a corresponding feedback signal to the timing controller 110 according to a detection result of the data signal, so that the timing controller 110 performs a corresponding operation on the data signal to be sent to the source driver chip 120 according to the feedback signal.
The timing controller 110 is configured to send a corresponding data signal to each source driver chip 120, receive a feedback signal sent by each source driver chip 120, and perform a corresponding operation on the data signal to be sent to each source driver chip 120 according to the received feedback signal, so as to implement signal compensation on the data signal.
In practical applications, referring to fig. 1B, the connection between the timing controller 110 and the source driver chip 120 is as follows: after being processed by the timing controller 110 disposed on the Control Printed Circuit Board (CPCB) 01, the data signals may be transmitted to a printed circuit board (XPCB) 03 for transmitting data signals through Connectors (Connectors) 02 and then transmitted to a source driving Chip 120 on a Chip On Film (COF) package 04, and the source driving Chip 120 may use the data signals to drive pixels in the display panel 05 to display images.
An embodiment of the present invention provides a signal compensation method, which may be applied to any source driver chip 120 shown in fig. 1A, as shown in fig. 2, and the method may include:
The source driving chip can use the data signal to drive the pixels in the display panel to display images.
The reference signal is a signal expected to be input to the first source driver chip, and the waveform and amplitude of the signal can be set according to actual needs.
And step 203, when the amplitude of the data signal is smaller than that of the reference signal, sending a first feedback signal to the time schedule controller.
The first feedback signal is used for instructing the time schedule controller to perform signal compensation operation on a data signal to be transmitted and then transmit the data signal.
In summary, according to the signal compensation method provided in the embodiment of the present invention, by detecting whether the amplitude of the data signal is smaller than the amplitude of the reference signal, and when the amplitude of the data signal is smaller than the amplitude of the reference signal, the first feedback signal is sent to the timing controller, and compared with the related art, the timing controller can execute the signal compensation operation on the data signal to be sent according to the first feedback signal, and send the signal to be sent after the compensation operation is executed to the corresponding source driver chip, so that the automatic compensation on the signal sent to the corresponding source driver chip is realized, and the efficiency of the signal compensation method is effectively improved.
An embodiment of the present invention further provides a signal compensation method, which can be applied to the timing controller 110 shown in fig. 1A or fig. 1B, and as shown in fig. 3, the method can include:
The source driving chip can use the data signal to drive the pixels in the display panel to display images.
The first feedback signal is sent by the source driving chip when the amplitude of the data signal is detected to be smaller than the amplitude of the reference signal.
And 303, performing signal compensation operation on the data signal to be transmitted according to the first feedback signal.
The data signal to be transmitted is a data signal to be transmitted to the source driver chip, and the signal compensation operation performed on the data signal to be transmitted by the timing controller may be an operation of increasing the amplitude of the data signal.
And step 304, sending the data signal to be sent after the signal compensation operation is executed to the source driving chip.
After the source driving chip receives the data signal after the signal compensation operation is performed, the data signal can be continuously used for driving the pixels in the display panel, and the display quality of the image displayed by the display panel can be improved when the data signal is used for driving the pixels because the signal compensation operation is performed on the data signal.
In summary, in the signal compensation method provided in the embodiment of the present invention, by receiving the first feedback signal sent by the source driver chip, performing the signal compensation operation on the data signal to be sent according to the first feedback signal, and sending the data signal to be sent after performing the signal compensation operation to the source driver chip, compared with the related art, the timing controller can perform the signal compensation operation on the data signal to be sent according to the first feedback signal, and send the signal to be sent after performing the compensation operation to the corresponding source driver chip, thereby implementing automatic compensation on the signal sent to the corresponding source driver chip, and effectively improving the efficiency of the signal compensation method.
Fig. 4 is a flowchart of another signal compensation method according to an embodiment of the present invention, where the method may be applied to the signal compensation system shown in fig. 1A, and fig. 4 illustrates a first source driver chip, which is any one of a plurality of source driver chips, and the first source driver chip may be referred to for actions of other source driver chips, as shown in fig. 4, where the method may include:
step 401, the timing controller sends a data signal to the first source driver chip.
Step 402, the first source driver chip detects whether the amplitude of the data signal is smaller than the amplitude of the reference signal.
The reference signal is a signal expected to be input to the first source driving chip, and the waveform and amplitude of the signal can be set according to actual needs.
When the amplitude of the data signal is smaller than the amplitude of the reference signal, it indicates that the amplitude of the data signal received by the first source driving signal is not enough to support normal display of the display panel, and at this time, signal compensation needs to be performed on the data signal to be sent to the first source driving signal in the timing controller, so step 403 may be performed; when the amplitude of the data signal is not less than the amplitude of the reference signal, it indicates that the amplitude of the data signal received by the first source driving signal can support normal display of the display panel, and at this time, signal compensation for the data signal is not needed, so step 406 may be performed.
For example, referring to the waveform a in fig. 5, the waveform of the reference signal in one period is shown, and the waveform of the received data signal is the waveform B in fig. 5, it can be seen that the amplitude of the data signal is smaller than the amplitude of the reference signal, then step 403 is executed.
In step 403, when the amplitude of the data signal is smaller than that of the reference signal, the first source driver chip determines whether the data signal is a signal on which a signal compensation operation has been performed.
There are various factors that cause the amplitude of the data signal to be less than the amplitude of the reference signal, such as: signal attenuation of the signal during transmission, or interference of high-frequency signals and other factors. Therefore, when the amplitude of the data signal is smaller than that of the reference signal, it is necessary to determine whether the data signal is a signal on which a signal compensation operation has been performed, so as to eliminate the influence of other factors such as high-frequency signal interference on the signal amplitude. And, when the data signal is a signal on which the compensation operation is not performed, it may be determined that the factor affecting the signal amplitude is signal attenuation of the signal during transmission, and at this time, step 404 is performed; when the data signal is a signal on which the signal compensation operation has been performed, since the data signal has been performed with the signal compensation operation and the amplitude of the data signal is still smaller than the amplitude of the reference signal, it may be determined that the factor affecting the signal amplitude of the data signal is high-frequency signal interference or other factors, and then step 405 is performed.
In step 404, when the data signal is a signal for which the compensation operation is not performed, the first source driving chip sends a first feedback signal to the timing controller.
When the amplitude of the data signal is smaller than the amplitude of the reference signal and the data signal is a signal on which the compensation operation is not performed, it may be determined that a factor affecting the amplitude of the signal is signal attenuation in the transmission process, and at this time, the first source driver chip may send a first feedback signal to the timing sequence controller to instruct the timing sequence controller to perform the signal compensation operation on the data signal to be sent and then send the data signal, so as to reduce or eliminate the influence of the signal attenuation in the transmission process on the amplitude of the signal. The amplitude of the first feedback signal can be set according to actual needs, for example: the first feedback signal may have an amplitude of 1.5 volts.
In step 405, when the data signal is a signal on which the signal compensation operation has been performed, the first source driving chip sends a second feedback signal to the timing controller.
When the amplitude of the data signal is smaller than the amplitude of the reference signal and the data signal is a signal on which a signal compensation operation has been performed, it may be determined that the influence of signal attenuation on the amplitude of the signal cannot be reduced or eliminated by signal compensation, and the factor influencing the amplitude of the signal is high-frequency signal interference or other factors, at this time, the data signal received by the first source driving signal is not enough to support normal display of the display panel, and therefore, the first source driving chip may send a second feedback signal to the timing controller to instruct the timing controller to stop sending the data signal, so as to further analyze the factor causing the amplitude of the data signal to be smaller than the amplitude of the reference signal. The amplitude of the second feedback signal can be set according to actual needs, and the amplitude of the second feedback signal is different from the amplitude of the first feedback signal, so that the timing controller can identify different feedback signals according to the amplitudes of the feedback signals. Illustratively, the magnitude of the second feedback signal may be 1.7 volts.
In practical implementation, the implementation process of this step 405 may also be: when the data signal is a signal on which the signal compensation operation has been performed, whether the amplitude increase multiple of the signal on which the signal compensation operation has been performed is greater than a preset multiple value is continuously judged, and when the amplitude increase multiple of the signal on which the signal compensation operation has been performed is greater than the preset multiple value, it can be determined that the signal compensation operation cannot compensate the influence of signal attenuation on the signal amplitude.
Optionally, the magnitude of the amplitude of the data signal may be represented by different code values, when detecting whether the amplitude of the data signal is smaller than the amplitude of the reference signal, the detection may be implemented by detecting the code values corresponding to the data signal and the reference signal respectively, and comparing the code values of the data signal and the reference signal, and when the amplitude of the data signal is smaller than the amplitude of the reference signal, outputting a detection result of an error code to indicate that the amplitude of the data signal is smaller than the amplitude of the reference signal. And when the amplitude of the data signal is smaller than that of the reference signal and the data signal is a signal on which the signal compensation operation has been performed, the detection result of the error code may be continuously output to indicate that the amplitude of the data signal is smaller than that of the reference signal and the data signal is a signal on which the signal compensation operation has been performed.
And step 406, when the amplitude of the data signal is not less than the amplitude of the reference signal, the first source driving chip sends a third feedback signal to the timing controller.
When the amplitude of the data signal is not less than the amplitude of the reference signal, it is indicated that the amplitude of the data signal received by the first source driving signal can support normal display of the display panel, and at this time, signal compensation is not required to be performed on the data signal, and the first source driving chip can send a third feedback signal to the timing controller to instruct the timing controller to send the data signal to be sent. The amplitude of the third feedback signal can be set according to actual needs, and the amplitude of the third feedback signal is different from the amplitudes of the first feedback signal and the second feedback signal, so that the timing controller can identify different feedback signals according to the amplitudes of the feedback signals. Illustratively, the magnitude of the third feedback signal may be 1 volt.
In step 407, the timing controller performs a corresponding operation on the data signal to be sent to the first source driver chip according to the received feedback signal.
After receiving the feedback signal sent by the first source driving chip, the timing controller may perform a corresponding operation on the data signal to be sent to the first source driving chip according to the feedback signal. According to practical situations, the feedback signal received by the timing controller may be any one of the first feedback signal, the second feedback signal and the third feedback signal, and when the feedback signal received by the timing controller is different, the corresponding operations performed by the timing controller are different, for example: when the feedback signal received by the timing sequence controller is a first feedback signal, the timing sequence controller needs to perform signal compensation operation on the data signal to be sent and sends the data signal to be sent after the signal compensation operation is performed to the source electrode driving chip, wherein the compensation operation of the timing sequence controller on the data signal can be the operation of increasing the amplitude of the data signal; when the feedback signal received by the timing controller is a second feedback signal, the timing controller needs to stop sending the data signal to the first source driving chip so as to further analyze the factor causing the amplitude of the data signal to be smaller than that of the reference signal; when the feedback signal received by the timing controller is the third feedback signal, the timing controller needs to transmit the data signal to be transmitted, that is, the timing controller does not need to perform signal compensation operation on the data signal to be transmitted.
It should be noted that the signal compensation method may be executed when each frame of data signal is transmitted, may be executed once every preset time length in an image display process, may also be executed after receiving an execution start signal triggered by a user, and may also be executed only before the display device leaves a factory, which is not specifically limited in this embodiment of the present invention. And if the data signal is transmitted during each frame, the source driving chip can feed back the change of the data signal in each frame to the time schedule controller so as to compensate the data signal according to the change of the data signal in real time, thereby improving the accuracy and convenience of signal compensation.
In practical applications, the source driver chip may further send more feedback signals with different amplitudes to the timing controller according to the size of the display panel and the attenuation degree of the signals, and the timing controller may perform corresponding operations according to the feedback signals with different amplitudes, for example: according to the attenuation degree of the signals, the source driving chip can be controlled to send a fourth feedback signal, a fifth feedback signal and a sixth feedback signal to the timing controller, and the timing controller can respectively increase the amplitude of the data signals by 10%, 20% and 30% corresponding to the fourth feedback signal, the fifth feedback signal and the sixth feedback signal, so as to realize signal compensation of the data signals.
In summary, according to the signal compensation method provided in the embodiment of the present invention, by detecting whether the amplitude of the data signal is smaller than the amplitude of the reference signal, and when the amplitude of the data signal is smaller than the amplitude of the reference signal, the first feedback signal is sent to the timing controller, and compared with the related art, the timing controller can execute the signal compensation operation on the data signal to be sent according to the first feedback signal, and send the signal to be sent after the compensation operation is executed to the corresponding source driver chip, so that the automatic compensation on the signal sent to the corresponding source driver chip is realized, and the efficiency of the signal compensation method is effectively improved. The signal compensation method solves the problem that the signal attenuation of the data signal in the transmission process affects the image display quality, and can be particularly applied to the signal compensation of a large-size display device with larger resolution, and the image display quality of the large-size display device can be ensured. Meanwhile, the signal compensation method provided by the embodiment of the invention is adopted to compensate the data signal, and compared with a compensation mode of manual adjustment, the signal transmitted on the source electrode driving chip is not required to be tested by using a relevant instrument, so that the situation that the chip on the COF is short-circuited due to poor operation can be avoided, namely the COF is not damaged.
An embodiment of the present invention provides a signal compensation apparatus, which is disposed in a source driver chip, as shown in fig. 6A, the apparatus 600 may include:
the receiving module 601 is configured to receive a data signal sent by the timing controller.
The detecting module 602 is configured to detect an amplitude of the data signal.
The first sending module 603 is configured to send a first feedback signal to the timing controller when the amplitude of the data signal is smaller than the amplitude of the reference signal, where the first feedback signal is used to instruct the timing controller to perform a signal compensation operation on the data signal to be sent and then send the data signal.
In summary, in the signal compensation apparatus provided in the embodiment of the present invention, the detection module detects whether the amplitude of the data signal is smaller than the amplitude of the reference signal, and the first sending module sends the first feedback signal to the timing controller when the amplitude of the data signal is smaller than the amplitude of the reference signal.
Optionally, when the amplitude of the data signal is smaller than the amplitude of the reference signal, as shown in fig. 6B, the apparatus 600 may further include:
the determining module 604 is configured to determine whether the data signal is a signal that has been subjected to a signal compensation operation.
At this time, the first sending module 603 is configured to:
when the data signal is a signal on which the compensation operation is not performed, a first feedback signal is transmitted to the timing controller.
Accordingly, as shown in fig. 6B, the apparatus 600 may further include:
a second sending module 605, configured to send a second feedback signal to the timing controller when the data signal is a signal on which the signal compensation operation has been performed, the second feedback signal being used to instruct the timing controller to stop sending the data signal.
Optionally, as shown in fig. 6B, the apparatus 600 may further include:
a third sending module 606, configured to send a third feedback signal to the timing controller when the amplitude of the data signal is not smaller than the amplitude of the reference signal, where the third feedback signal is used to instruct the timing controller to send the data signal to be sent.
In summary, in the signal compensation apparatus provided in the embodiment of the present invention, the detection module detects whether the amplitude of the data signal is smaller than the amplitude of the reference signal, and the first sending module sends the first feedback signal to the timing controller when the amplitude of the data signal is smaller than the amplitude of the reference signal.
An embodiment of the present invention further provides a signal compensation apparatus, which is disposed in a timing controller, as shown in fig. 7, the apparatus 700 may include:
the sending module 701 is configured to send a data signal to the source driver chip.
The receiving module 702 is configured to receive a first feedback signal sent by the source driver chip, where the first feedback signal is sent by the source driver chip when the amplitude of the data signal detected by the source driver chip is smaller than the amplitude of the reference signal.
The compensation module 703 is configured to perform a signal compensation operation on the data signal to be transmitted according to the first feedback signal.
The sending module 701 is configured to send a data signal to be sent after performing the signal compensation operation to the source driver chip.
In summary, in the signal compensation apparatus provided in the embodiment of the present invention, the receiving module receives the first feedback signal sent by the source driver chip, the compensation module performs a signal compensation operation on the data signal to be sent according to the first feedback signal, and the sending module sends the data signal to be sent after performing the signal compensation operation to the source driver chip.
Optionally, the receiving module 702 is further configured to receive a second feedback signal sent by the source driver chip, where the second feedback signal is sent by the source driver chip when it is detected that the amplitude of the data signal is smaller than the amplitude of the reference signal and the data signal is a signal on which a signal compensation operation has been performed.
Optionally, the receiving module 702 is further configured to receive a third feedback signal sent by the source driver chip, where the third feedback signal is sent by the source driver chip when detecting that the amplitude of the data signal is not less than the amplitude of the reference signal.
The sending module 701 is further configured to send a data signal to be sent to the source driver chip.
In summary, in the signal compensation apparatus provided in the embodiment of the present invention, the receiving module receives the first feedback signal sent by the source driver chip, the compensation module performs the signal compensation operation on the data signal to be sent according to the first feedback signal, and the sending module sends the data signal to be sent after performing the signal compensation operation to the source driver chip.
An embodiment of the invention further provides a source driver chip, and as shown in fig. 8A, the source driver chip 120 may include: a switching device 1201 and a processor 1202.
The processor 1202 is connected to the signal input terminal of the switching device 1201, and the processor 1202 is configured to detect whether the amplitude of the received data signal is smaller than that of the reference signal, and input a corresponding feedback signal to the signal input terminal of the switching device 1201 based on the detection result, so that the source driver chip performs the signal compensation method as shown in fig. 2 or fig. 4. Illustratively, when the detection result is that the amplitude of the data signal is smaller than that of the reference signal, and the data signal is a signal on which the compensation operation is not performed, the processor 1202 inputs a first feedback signal to the signal input terminal of the switching device 1201; when the detection result is that the amplitude of the data signal is smaller than that of the reference signal and the data signal is a signal on which a signal compensation operation has been performed, the processor 1202 inputs a second feedback signal to the signal input terminal of the switching device 1201; when the detection result is that the amplitude of the data signal is not smaller than the amplitude of the reference signal, the processor 1202 inputs the third feedback signal to the signal input terminal of the switching device 1201.
The control terminal of the switching device 1201 is connected to the control signal terminal S, and the signal output terminal of the switching device 1201 is connected to the input terminal of the timing controller 110, and is configured to input a feedback signal to the timing controller 110 when the potential of the control signal output by the control signal terminal S is the first potential. For example, when the potential of the control signal output from the control signal terminal S is a first potential and the processor 1202 inputs a first feedback signal to the signal input terminal of the switching device 1201, the switching device 1201 may input the first feedback signal to the timing controller 110. The control signal may be a periodic clock signal.
Optionally, as shown in fig. 8B, the source driving chip may further include: pull up resistor 1203.
One end of the pull-up resistor 1203 is connected to the input end of the timing controller 110, the other end of the pull-up resistor 1203 is grounded, and the pull-up resistor 1203 is configured to input a feedback signal at a preset potential to the timing controller 110 when the potential of the control signal is the second potential. The timing controller 110 receives the feedback signal according to the preset potential, and can distinguish different data signal transmission periods. The preset potential can be set according to actual needs, and the amplitude of the preset potential is different from the amplitudes of the first feedback signal, the second feedback signal and the third feedback signal, so that the timing controller 110 can identify different feedback signals according to the amplitudes of the feedback signals. Illustratively, the preset potential may have a magnitude of 0.5 volts.
Among them, the switching device 1201 may be a transistor, for example: the transistor may be an N-type transistor, in which case the first potential is high relative to the second potential, or a P-type transistor, in which case the first potential is low relative to the second potential.
Illustratively, as shown in fig. 9, the switching device 1201 may be a transistor 1201a, the transistor 1201a may be an N-type transistor, a gate of the transistor 1201a is connected to the clock signal terminal CLK, a first stage of the transistor 1201a is connected to the processor 1202, a second pole of the transistor 1201a is connected to the input terminal of the timing controller 110, and the second pole of the transistor 1201a is further connected to one end of a pull-up resistor 1203, and the other end of the pull-up resistor 1203 is grounded.
Referring to fig. 10, when CLK is at a low level, the second pole of the transistor 1201a outputs a feedback signal with a preset potential Vf 1. While the CLK is at the high level, the processor 1202 detects that the amplitude of the data signal is not less than that of the reference signal during transmission of the nth frame and the N +1 th frame data signals, and outputs a third feedback signal having an amplitude Vf2 to the second pole of the transistor 1201 a. The timing controller 110 may continue to transmit the data signal to the source driving chip 120 after receiving the third feedback signal.
In the process of transmitting the N +2 th frame data signal, the processor 1202 detects that the amplitude of the data signal is smaller than that of the reference signal, and the data signal is a signal on which the compensation operation is not performed, outputs a first feedback signal with an amplitude Vf3 to the second pole of the transistor 1201a, and after receiving the first feedback signal, the timing controller 110 needs to perform a signal compensation operation on the data signal to be transmitted, and transmits the data signal to be transmitted after performing the signal compensation operation to the source driver chip 120.
In the process of transmitting the N +3 th frame data signal, the processor 1202 detects that the amplitude of the data signal is smaller than that of the reference signal, and the data signal is a signal on which the signal compensation operation has been performed, and outputs a second feedback signal having an amplitude Vf4 to the second pole of the transistor 1201a, and the timing controller 110 stops transmitting the data signal to the source driving chip 120 when receiving the second feedback signal, so as to further analyze a factor that causes the amplitude of the data signal to be smaller than that of the reference signal.
In summary, according to the source driver chip provided in the embodiment of the present invention, the processor detects whether the amplitude of the received data signal is smaller than the amplitude of the reference signal, inputs the corresponding feedback signal to the signal input terminal of the switching device based on the detection result, and inputs the feedback signal to the timing controller through the switching device, so that, compared with the related art, the timing controller can perform a signal compensation operation on the data signal to be transmitted according to the feedback signal, and transmit the signal to be transmitted after performing the compensation operation to the corresponding source driver chip, thereby implementing automatic compensation on the signal transmitted to the corresponding source driver chip, and effectively improving the efficiency of the signal compensation method.
An embodiment of the present invention further provides a signal compensation apparatus, where the signal compensation apparatus may include:
a processor;
a memory for storing executable instructions of the processor;
wherein the processor is configured to:
receiving a data signal sent by a timing controller;
detecting whether the amplitude of the data signal is smaller than that of the reference signal;
and when the amplitude of the data signal is smaller than that of the reference signal, sending a first feedback signal to the time schedule controller, wherein the first feedback signal is used for indicating the time schedule controller to carry out signal compensation operation on the data signal to be sent and then sending the data signal.
The embodiment of the present invention further provides another signal compensation apparatus, which may include:
a processor;
a memory for storing executable instructions of the processor;
wherein the processor is configured to:
sending a data signal to a source electrode driving chip;
receiving a first feedback signal sent by a source electrode driving chip, wherein the first feedback signal is sent when the source electrode driving chip detects that the amplitude of a data signal is smaller than that of a reference signal;
according to the first feedback signal, performing signal compensation operation on a data signal to be transmitted;
and sending the data signal to be sent after the signal compensation operation is executed to the source electrode driving chip.
An embodiment of the present invention further provides a signal compensation system, as shown in fig. 1A, the signal compensation system may include: a plurality of source driving chips 120 and a timing controller 110.
The source driver chip includes the signal compensation device shown in fig. 6A or fig. 6B.
The timing controller includes a signal compensation device shown in fig. 7.
An embodiment of the present invention further provides a storage medium, which may be a non-volatile computer-readable storage medium, where instructions are stored, and when the instructions are executed on a processing component, the processing component is caused to execute the signal compensation method provided in the embodiment of the present invention.
Embodiments of the present invention also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the signal compensation method provided by embodiments of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (9)
1. A signal compensation method is applied to a source driving chip and comprises the following steps:
receiving a data signal sent by a timing controller;
detecting whether the amplitude of the data signal is smaller than that of the reference signal;
when the amplitude of the data signal is smaller than that of a reference signal, sending a first feedback signal to the time schedule controller, wherein the first feedback signal is used for indicating the time schedule controller to send the data signal to be sent after performing signal compensation operation on the data signal to be sent, and the signal compensation operation performed on the data signal to be sent by the time schedule controller comprises the operation of increasing the amplitude of the data signal;
when the amplitude of the data signal is less than the amplitude of the reference signal, the method further comprises:
judging whether the data signal is a signal on which a signal compensation operation has been performed;
transmitting a first feedback signal to the timing controller, comprising:
when the data signal is a signal on which a signal compensation operation is not performed, transmitting a first feedback signal to the timing controller;
the method further comprises the following steps: when the data signal is a signal on which a signal compensation operation has been performed, transmitting a second feedback signal to the timing controller, the second feedback signal being used to instruct the timing controller to stop transmitting the data signal.
2. The method of claim 1, wherein after said detecting whether the magnitude of the data signal is less than the magnitude of the reference signal, the method further comprises:
and when the amplitude of the data signal is not less than that of the reference signal, sending a third feedback signal to the time sequence controller, wherein the third feedback signal is used for indicating the time sequence controller to send the data signal to be sent.
3. A signal compensation method applied to a timing controller, the method comprising:
sending a data signal to a source electrode driving chip;
receiving a first feedback signal sent by the source driving chip, wherein the first feedback signal is sent by the source driving chip when the source driving chip detects that the amplitude of the data signal is smaller than the amplitude of the reference signal;
according to the first feedback signal, performing signal compensation operation on a data signal to be transmitted;
sending a data signal to be sent after executing signal compensation operation to the source electrode driving chip, wherein the signal compensation operation executed by the time sequence controller on the data signal to be sent comprises the operation of increasing the amplitude of the data signal;
the method further comprises the following steps:
receiving a second feedback signal sent by the source electrode driving chip, wherein the second feedback signal is a signal sent by the data signal when the signal compensation operation is executed;
and stopping sending data signals to the source electrode driving chip according to the second feedback signal.
4. A signal compensation apparatus, wherein the apparatus is disposed in a source driver chip, the apparatus comprising:
the receiving module is used for receiving the data signals sent by the timing controller;
the detection module is used for detecting the amplitude of the data signal;
the first sending module is used for sending a first feedback signal to the time schedule controller when the amplitude of the data signal is smaller than the amplitude of the reference signal, wherein the first feedback signal is used for indicating the time schedule controller to send the data signal to be sent after executing signal compensation operation, and the signal compensation operation executed by the time schedule controller on the data signal to be sent comprises the operation of increasing the amplitude of the data signal;
the device further comprises:
the judging module is used for judging whether the data signal is a signal on which signal compensation operation is executed or not when the amplitude of the data signal is smaller than that of a reference signal;
the first sending module is further configured to send a first feedback signal to the timing controller when the data signal is a signal on which a signal compensation operation is not performed;
and a second sending module which sends a second feedback signal to the timing controller when the data signal is a signal on which a signal compensation operation has been performed, the second feedback signal being used for instructing the timing controller to stop sending the data signal.
5. A signal compensation apparatus provided in a timing controller, the apparatus comprising:
the sending module is used for sending a data signal to the source electrode driving chip;
the receiving module is used for receiving a first feedback signal sent by the source driving chip, wherein the first feedback signal is sent by the source driving chip when the amplitude of the data signal is detected to be smaller than the amplitude of the reference signal;
the compensation module is used for executing signal compensation operation on the data signal to be transmitted according to the first feedback signal;
the sending module is further configured to send a to-be-sent data signal after performing a signal compensation operation to the source driver chip, and the signal compensation operation performed by the timing controller on the to-be-sent data signal includes an operation of increasing an amplitude of the data signal;
the receiving module is further configured to receive a second feedback signal sent by the source driver chip, where the second feedback signal is a signal sent when the data signal has been subjected to signal compensation operation, and stop sending the data signal to the source driver chip according to the second feedback signal.
6. A source driving chip, comprising: a switching device and a processor;
the processor is connected with the signal input end of the switching device, and is used for detecting whether the amplitude of the received data signal is smaller than that of the reference signal, and inputting a corresponding feedback signal to the signal input end of the switching device based on the detection result, so that the source driving chip executes the signal compensation method of claim 1 or 2;
the control end of the switching device is connected with the control signal end, the signal output end of the switching device is connected with the input end of the time schedule controller, and the switching device is used for inputting the feedback signal to the time schedule controller when the electric potential of the control signal output by the control signal end is a first electric potential;
the processor is further configured to input corresponding feedback signals with different amplitudes to the signal input end of the switching device according to the attenuation degree of the data signal.
7. The source driver chip as claimed in claim 6, further comprising: a pull-up resistor;
one end of the pull-up resistor is connected with the input end of the time sequence controller, the other end of the pull-up resistor is grounded, and the pull-up resistor is used for inputting a feedback signal at a preset potential to the time sequence controller when the potential of the control signal is a second potential.
8. A signal compensation system, the signal compensation system comprising: the source electrode driving chip and the time schedule controller;
the source driver chip is used for executing the signal compensation method according to claim 1 or 2;
the timing controller is used for executing the signal compensation method according to claim 3.
9. A storage medium having stored therein instructions which, when run on a processing component, cause the processing component to execute the signal compensation method of claim 1 or 2; or cause the processing component to perform the signal compensation method of claim 3.
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| CN114895962B (en) * | 2022-03-24 | 2024-02-06 | 扬州万方科技股份有限公司 | Signal acquisition compensation method and device based on microprocessor |
| CN117975842A (en) * | 2022-10-24 | 2024-05-03 | 摩星半导体(广东)有限公司 | Time sequence control circuit, driving circuit and display device |
| CN116092410A (en) * | 2023-01-31 | 2023-05-09 | 惠科股份有限公司 | Display panel, signal compensation circuit thereof and signal compensation method |
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