CN113593461A - Display panel and driving method thereof - Google Patents
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Abstract
The embodiment of the application discloses a display panel and a driving method thereof, wherein the method comprises the steps that a system chip sends VBO data; the time schedule controller receives and identifies the VBO data to acquire non-pixel data; the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times; and resetting the system chip according to the first feedback signal. In the embodiment, a detection module is added in the time schedule controller to detect whether the non-pixel data meets the standard VBO protocol, and if the error frequency of the non-pixel data reaches the set frequency, the system chip is reset to reduce the risk of abnormal display pictures.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a driving method thereof.
Background
During research and practice in the prior art, the inventors of the present application have found that, in addition to passively receiving pixel data in VBO data, the timing controller needs to recognize and correctly display the pixel data according to non-pixel data in VBO.
However, the conventional timing controller can only passively receive the non-pixel data, and if the non-pixel data is abnormal, the corresponding abnormality occurs in the screen display.
Disclosure of Invention
Embodiments of the present disclosure provide a display panel and a driving method thereof, which can reduce the risk of display screen abnormality by detecting the abnormality of non-pixel data in VBO data.
The embodiment of the application provides a driving method of a display panel, which comprises the following steps:
the system chip sends VBO data;
the time sequence controller receives and identifies the VBO data to acquire non-pixel data;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times;
and resetting the system chip according to the first feedback signal.
Optionally, in some embodiments of the present application, the timing controller includes a detection module and an output module;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times, comprising the following steps:
the detection module compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; if the error times reach the set times, outputting a first instruction signal to the output module;
the output module outputs a first feedback signal according to the first instruction signal.
Optionally, in some embodiments of the present application, the timing controller compares a setting code with the non-pixel data, accumulates error times of the non-pixel data, and outputs a first instruction signal to the system chip if the error times reaches the setting times, further including the following steps:
if the error frequency does not reach the set frequency, the detection module sends a second instruction signal to the output module; and the output module outputs a second feedback signal according to the second instruction signal.
Optionally, in some embodiments of the present application, the driving method further includes the steps of:
and according to the second feedback signal, the system chip continuously sends the VBO data.
Optionally, in some embodiments of the present application, the timing controller includes a detection module;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first instruction signal to the system chip if the error times reaches the set times, comprising the following steps:
the detection module compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; if the error frequency reaches the set frequency, outputting a first feedback signal to the system chip, and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip;
the driving method further includes the steps of:
and according to the second feedback signal, the system chip continuously sends the VBO data.
Optionally, in some embodiments of the present application, the system chip is reset according to the first feedback signal, and then the driving method further includes the following steps:
the detection module compares the setting code with the non-pixel data again and accumulates the error times of the non-pixel data.
Optionally, in some embodiments of the present application, the first feedback signal is a high-level signal, and the second feedback signal is a low-level signal.
Optionally, in some embodiments of the present application, the timing controller includes an identification module;
the time sequence controller receives and identifies the VBO data and obtains non-pixel data, and the method comprises the following steps:
and the identification module receives the VBO data and acquires non-pixel data and pixel data by identifying the characteristic value in the VBO data.
Optionally, in some embodiments of the present application, the driving method further includes the steps of:
storing the non-pixel data in a first register, the first register sending the non-pixel data driving source driver;
and storing the pixel data in a second register, wherein the second register sends the pixel data to drive a gate driver.
Optionally, in some embodiments of the present application, before the system chip sends out the VBO data, the driving method further includes the following steps:
the time schedule controller enters a preparation stage, and if the preparation is finished, a starting signal is sent to the system chip;
the system chip sends out VBO data, and the VBO data comprises the following steps:
and the system chip sends VBO data according to the starting signal.
The embodiment of the present application further provides a display panel, which includes:
the system chip is used for sending VBO data;
the time sequence controller is used for receiving and identifying the VBO data and acquiring non-pixel data; the time sequence controller is also used for comparing a set code with the non-pixel data, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip if the error times reaches the set times;
the system chip is further used for carrying out resetting processing according to the first feedback signal.
Optionally, in some embodiments of the present application, the timing controller includes a detection module and an output module;
the detection module is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; if the error times reach the set times, outputting a first instruction signal to the output module;
the output module is used for outputting a first feedback signal according to the first instruction signal.
Optionally, in some embodiments of the present application, the detecting module is further configured to send a second instruction signal to the output module if the number of errors does not reach the set number; the output module is used for outputting a second feedback signal according to the second instruction signal.
Optionally, in some embodiments of the present application, the driving method further includes the steps of:
and according to the second feedback signal, the system chip continuously sends the VBO data.
Optionally, in some embodiments of the present application, the timing controller includes a detection module; the detection module is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; if the error frequency reaches the set frequency, outputting a first feedback signal to the system chip, and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip;
the system chip is further configured to send the VBO data according to the second feedback signal.
Optionally, in some embodiments of the present application, the first feedback signal is a high-level signal, and the second feedback signal is a low-level signal.
Optionally, in some embodiments of the present application, the timing controller includes an identification module;
the identification module is used for receiving the VBO data and acquiring non-pixel data and pixel data by identifying characteristic values in the VBO data.
Optionally, in some embodiments of the present application, the display panel further includes a first register and a second register; the first register is used for storing the non-pixel data and sending the non-pixel data driving source driver; the second register is used for storing the pixel data and sending the pixel data to drive the gate driver.
The display panel and the driving method thereof in the embodiment of the application comprise that a system chip sends VBO data; the time schedule controller receives and identifies the VBO data to acquire non-pixel data; the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times; and resetting the system chip according to the first feedback signal. In the embodiment, a detection function is added in the time schedule controller to detect whether the non-pixel data meets the standard VBO protocol, and if the error frequency of the non-pixel data reaches the set frequency, the system chip is reset to reduce the risk of abnormal display pictures.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a first structure of a display panel provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a second structure of a display panel provided in an embodiment of the present application;
fig. 3 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present disclosure;
fig. 4 is a timing diagram of a driving method of a display panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The embodiments of the present application provide a driving method of a display panel, which is described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Referring to fig. 1, an embodiment of the present disclosure provides a display panel 100, which includes a system chip Soc and a timing controller Tcon.
The system chip Soc is used for sending VBO data;
the time sequence controller Tcon is used for receiving and identifying the VBO data and acquiring non-pixel data; the time sequence controller is also used for comparing a set code with the non-pixel data, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip if the error times reaches the set times;
the system chip Soc is further configured to perform a reset process according to the first feedback signal.
The display panel 100 of the embodiment adopts a detection function added in the timing controller Tcon to detect whether the non-pixel data meets the VBO protocol of the standard, and resets the system chip Soc if the error frequency of the non-pixel data reaches the set frequency, so as to reduce the risk of the display frame abnormality.
Optionally, the timing controller Tcon includes a detection module Zc and an output module Sc.
The detection module Zc is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; if the error times reach the set times, outputting a first instruction signal to the output module;
the output module Sc is configured to output a first feedback signal according to the first instruction signal.
Optionally, the detecting module Zc is further configured to send a second instruction signal to the output module Sc if the number of errors does not reach the set number; the output module Sc is configured to output a second feedback signal according to the second instruction signal.
Optionally, the system chip Soc is further configured to send the VBO data according to the second feedback signal. The command signal may be a level signal, a digital signal, or the like.
The setting code is VBO standard protocol, that is, the timing controller Tcon checks non-pixel data according to the VBO standard protocol, and accumulates 1 error every time non-pixel data that does not conform to the VBO standard protocol is detected.
Optionally, the set number of times may be determined according to actual conditions, and may be, for example, between 50 and 200. Certainly, the set times cannot be too low, and if the set times are too low, the display panel cannot normally display; the height cannot be too high, and the risk of display screen abnormity cannot be reduced if the height is too high.
It should be noted that the output module Sc sends a LOCKN signal to the system chip Soc, and the LOCKN signal is a first feedback signal when the LOCKN signal is in a high level state, and is a second feedback signal when the LOCKN signal is in a low power screen state.
In some embodiments, referring to fig. 2, the timing controller Tcon includes a detection module Zc. The detection module Zc is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip Soc.
And the system chip Soc is also used for sending the VBO data according to the second feedback signal.
Compared with the first structure, the second structure of the display panel 100 adopts the mode that the detection module Zc replaces the detection module Zc + the output module Sc of the first structure, so that the structure is simplified.
Optionally, the first feedback signal is a high-level signal, and the second feedback signal is a low-level signal.
Optionally, in the display panel 100 of this embodiment, the timing controller Tcon includes an identification module Re;
the identification module Re is used for receiving the VBO data and acquiring non-pixel data and pixel data by identifying characteristic values in the VBO data.
Optionally, the characteristic value is a special combination of numbers that is different from the pixel data and the non-pixel data. For example, the VBO includes 30 unit data, the first 15 are pixel data, and the second 15 are non-pixel data; after the 15 th pixel data, the 1 st non-pixel data is preceded by a number combination, and when the number combination is recognized by the recognition module Re, the data after the number combination is represented as non-pixel data.
Alternatively, the non-pixel data includes a control code (control code) and a K code (K code) including BS, SYNH, BE, and BE _ SR.
Optionally, the display panel 100 further includes a first register Rt1 and a second register Rt 2; the first register Rt1 is for storing the non-pixel data and transmitting the non-pixel data driving source driver; the second register Rt2 is used to store the pixel data and transmit the pixel data to drive the gate driver.
The driving method of the display panel 100 of the present embodiment is a driving method of the display panel of the following embodiment. And will not be described in detail herein.
Referring to fig. 1 and fig. 3, an embodiment of the present application provides a driving method of a display panel, which includes the following steps:
step B101, the system chip Soc sends VBO data;
step B102, a time schedule controller Tcon receives and identifies the VBO data to obtain non-pixel data;
step B103, comparing a set code with the non-pixel data by the timing controller Tcon, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip if the error times reaches the set times;
and step B104, resetting the system chip Soc according to the first feedback signal.
The driving method of the embodiment of the application adopts the mode that the detection function is added in the time schedule controller Tcon to detect whether the non-pixel data meets the standard VBO protocol, and if the error times of the non-pixel data reaches the set times, the system chip Soc is reset to reduce the risk of abnormal display pictures.
The driving method of the display panel will be explained in detail below.
Optionally, referring to fig. 3, before step B101, that is, before the system chip sends out the VBO data, the driving method further includes the following steps:
and step B100, the time schedule controller Tcon enters a preparation stage, and if the preparation is finished, a starting signal is sent to the system chip Soc.
In the preparation phase, a time schedule controller (Tcon) carries out self-checking recovery according to set data until the preparation is finished, and the time schedule controller (Tcon) can receive VBO data at the moment; and after the preparation is finished, sending a starting signal to the system chip Soc.
Optionally, after the system chip Soc is reset, the timing controller Tcon may enter the preparation phase again.
Then, the process proceeds to step B101.
Step B101, the system chip Soc sends VBO data; and the system chip Soc sends VBO data according to the starting signal. And then proceeds to step B102.
Step B102, a time schedule controller Tcon receives and identifies the VBO data to obtain non-pixel data;
optionally, the timing controller Tcon includes an identification module Re.
Step B102 may include: the identification module Re receives the VBO data and acquires non-pixel data and pixel data by identifying characteristic values in the VBO data.
Optionally, the characteristic value is a special combination of numbers that is different from the pixel data and the non-pixel data. For example, the VBO includes 30 unit data, the first 15 are pixel data, and the second 15 are non-pixel data; after the 15 th pixel data, the 1 st non-pixel data is preceded by a number combination, and when the number combination is recognized by the recognition module Re, the data after the number combination is represented as non-pixel data.
Alternatively, the non-pixel data includes a control code (control code) and a K code (K code) including BS, SYNH, BE, and BE _ SR.
Optionally, referring to fig. 1, the driving method further includes the following steps:
storing the non-pixel data in a first register Rt1, the first register Rt1 sending the non-pixel data driving source driver; the pixel data is stored in a second register Rt2, and the second register Rt2 sends the pixel data to drive a gate driver.
Wherein a portion of the non-pixel data is stored in a first register to drive a source driver; part of the non-pixel data is also used to maintain the system stability of the timing controller Tcon.
Then, the process proceeds to step B103.
And step B103, comparing a set code with the non-pixel data by the timing controller Tcon, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip Soc if the error times reaches the set times.
The setting code is VBO standard protocol, that is, the timing controller Tcon checks non-pixel data according to the VBO standard protocol, and accumulates 1 error every time non-pixel data that does not conform to the VBO standard protocol is detected.
Optionally, the timing controller Tcon includes a detection module Zc and an output module Sc.
Step B103 may include: the detection module Zc compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; if the error frequency reaches the set frequency, outputting a first instruction signal to the output module Sc;
and the output module Sc outputs a first feedback signal according to the first instruction signal.
Optionally, step B103 may further include: if the error frequency does not reach the set frequency, the detection module Zc sends a second instruction signal to the output module Sc; and the output module Sc outputs a second feedback signal according to the second instruction signal.
Optionally, the first feedback signal is a high-level signal, and the second feedback signal is a low-level signal. The command signal may be a level signal, a digital signal, or the like.
Optionally, the set number of times may be determined according to actual conditions, and may be, for example, between 50 and 200. Certainly, the set times cannot be too low, and if the set times are too low, the display panel cannot normally display; the height cannot be too high, and the risk of display screen abnormity cannot be reduced if the height is too high.
It should be noted that the output module Sc sends a LOCKN signal to the system chip Soc, and the LOCKN signal is a first feedback signal when the LOCKN signal is in a high level state, and is a second feedback signal when the LOCKN signal is in a low power screen state.
Optionally, in some embodiments, referring to fig. 2, the timing controller Tcon includes a detection module Zc. Step B103 may also include: the detection module Zc compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip Soc.
That is, this embodiment simplifies the internal structure of the timing controller Tcon.
Then proceed to step B104.
And step B104, resetting the system chip Soc according to the first feedback signal.
Optionally, step B104 may further include: and the system chip Soc sends the VBO data according to the second feedback signal.
When the system chip Soc detects that the LOCKN signal is in a high-level state, namely a first feedback signal, the system chip Soc automatically resets; and when the system chip Soc detects that the LOCKN signal is in a low level state, namely a second feedback signal, the system chip Soc continues to send the VBO data.
Optionally, the system chip is reset according to the first feedback signal, and then the driving method further includes the following steps:
the detection module Zc re-compares the setting code with the non-pixel data and accumulates the number of errors of the non-pixel data.
That is, after the Soc is reset, the detecting module Zc accumulates the error count of the non-pixel data again.
In some embodiments, after the output module Sc sends out the first feedback signal, the timing controller Tcon enters a preparation phase after detecting that the LOCKN signal is in a high level state. That is, in this embodiment, the operation of resetting the Soc and the operation of entering the preparation phase by the timing controller Tcon can be performed simultaneously, thereby saving time.
This completes the process of the driving method of the display panel of the present embodiment.
Referring to fig. 4, the timing sequence corresponding to the LOCKN signal in the driving method of the display panel of the embodiment is described as follows:
when the LOCKN signal is in a high state (first feedback signal), the clock controller Tcon is in a data clock recovery phase (CDR tracing).
When the LOCKN signal is in a low level state (second feedback signal), the clock controller Tcon sequentially enters a data format calibration phase (ALN training) and a Normal data transmission phase (Normal Pattern).
And when the clock controller Tcon enters a data format calibration stage, the system chip Soc transmits the VBO data to the clock controller Tcon.
The detection module Zc detects the non-pixel data in the data format calibration stage and the normal data transmission stage. When the accumulated error times of the detection module Zc reaches the set times, the LOCKN signal is pulled up from a low level state to a high level state, that is, the second feedback signal is converted into the first feedback signal, so as to cause the system chip Soc to be reset, and the timing controller Tcon enters a data clock recovery stage (CDR tracking). After the time schedule controller Tcon is recovered, the LOCKN signal is pulled down again to be a low level signal, and the time schedule controller Tcon starts to receive VBO data again.
The driving method of the embodiment of the application comprises the steps that a system chip Soc sends VBO data; the time sequence controller Tcon receives and identifies the VBO data to obtain non-pixel data; comparing a set code with the non-pixel data by the timing controller Tcon, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip Sco if the error times reaches the set times; and resetting the system chip Soc according to the first feedback signal. In the embodiment, a detection function is added in the timing controller Tcon to detect whether the non-pixel data meets the standard VBO protocol, and if the error frequency of the non-pixel data reaches the set frequency, the system chip Soc is reset to reduce the risk of abnormal display frames.
The foregoing describes in detail a driving method of a display panel provided in an embodiment of the present application, and a specific example is applied to illustrate the principle and the implementation of the present application, and the above description of the embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. A display panel, comprising:
the system chip is used for sending VBO data;
the time sequence controller is used for receiving and identifying the VBO data and acquiring non-pixel data; the time sequence controller is also used for comparing a set code with the non-pixel data, accumulating the error times of the non-pixel data, and outputting a first feedback signal to the system chip if the error times reaches the set times;
the system chip is further used for carrying out resetting processing according to the first feedback signal.
2. The display panel according to claim 1, wherein the timing controller comprises a detection module and an output module;
the detection module is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; if the error times reach the set times, outputting a first instruction signal to the output module;
the output module is used for outputting a first feedback signal according to the first instruction signal.
3. The display panel according to claim 2, wherein the detecting module is further configured to send a second instruction signal to the output module if the number of errors does not reach the set number; the output module is used for outputting a second feedback signal according to the second instruction signal.
4. The display panel of claim 3, wherein the system on chip is further configured to send the VBO data according to the second feedback signal.
5. The display panel of claim 1, wherein the timing controller comprises a detection module; the detection module is used for comparing the set code with the non-pixel data and accumulating the error times of the non-pixel data; if the error frequency reaches the set frequency, outputting a first feedback signal to the system chip, and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip;
the system chip is further configured to send the VBO data according to the second feedback signal.
6. The display panel according to any one of claims 3 to 5, wherein the first feedback signal is a high level signal and the second feedback signal is a low level signal.
7. The display panel according to claim 1, wherein the timing controller includes an identification module;
the identification module is used for receiving the VBO data and acquiring non-pixel data and pixel data by identifying characteristic values in the VBO data.
8. The display panel according to claim 7, wherein the display panel further comprises a first register and a second register; the first register is used for storing the non-pixel data and sending the non-pixel data driving source driver; the second register is used for storing the pixel data and sending the pixel data to drive the gate driver.
9. A method of driving a display panel, comprising the steps of:
the system chip sends VBO data;
the time sequence controller receives and identifies the VBO data to acquire non-pixel data;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times;
and resetting the system chip according to the first feedback signal.
10. The method according to claim 9, wherein the timing controller comprises a detection module and an output module;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first feedback signal to the system chip if the error times reaches the set times, comprising the following steps:
the detection module compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; if the error times reach the set times, outputting a first instruction signal to the output module;
the output module outputs a first feedback signal according to the first instruction signal.
11. The method as claimed in claim 10, wherein the timing controller compares a set code with the non-pixel data, accumulates error times of the non-pixel data, and outputs a first command signal to the system chip if the error times reaches a set time, further comprising:
if the error frequency does not reach the set frequency, the detection module sends a second instruction signal to the output module; the output module outputs a second feedback signal according to the second instruction signal;
the driving method further includes the steps of:
and sending the VBO data by the system chip according to the second feedback signal.
12. The method according to claim 9, wherein the timing controller comprises a detection module;
the time schedule controller compares a set code with the non-pixel data, accumulates the error times of the non-pixel data, and outputs a first instruction signal to the system chip if the error times reaches the set times, comprising the following steps:
the detection module compares a set code with the non-pixel data and accumulates the error times of the non-pixel data; if the error frequency reaches the set frequency, outputting a first feedback signal to the system chip, and if the error frequency does not reach the set frequency, outputting a second feedback signal to the system chip;
the driving method further includes the steps of:
and sending the VBO data by the system chip according to the second feedback signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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