CN113345361B - Driving circuit, driving method and display device - Google Patents
Driving circuit, driving method and display device Download PDFInfo
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- CN113345361B CN113345361B CN202110550924.9A CN202110550924A CN113345361B CN 113345361 B CN113345361 B CN 113345361B CN 202110550924 A CN202110550924 A CN 202110550924A CN 113345361 B CN113345361 B CN 113345361B
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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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
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Abstract
The application discloses a driving circuit, a driving method and a display device, wherein the driving circuit comprises a power supply module, a time sequence control module, a level conversion module and a grid driving circuit, and the time sequence control module outputs an initial grid starting signal and an initial clock signal; the input end of the level conversion module is connected with the output end of the power supply module; the input end of the grid driving circuit is connected with the output end of the level conversion module and is used for receiving a grid starting signal and a clock signal to drive the display panel; the power supply module comprises a detection circuit and an adjustment circuit, wherein the detection circuit detects the condition of an electric signal at the output end of the power supply module and generates detection data; the input end of the adjusting circuit is connected with the output end of the detecting circuit, and the output end of the adjusting circuit is connected with the input end of the level conversion module; the adjusting circuit receives the detection data and outputs a standard high-level signal and a standard low-level signal corresponding to the detection data to the level conversion module according to a preset rule.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving circuit, a driving method, and a display device.
Background
At present, the display requirements of people on the display device are higher and higher, the stability requirements on the use are also higher and higher, most of display panels are guaranteed in normal environments, but if special environments appear, the display effects are often unsatisfactory.
For example, a level conversion circuit of a display panel has a function of receiving a standard high level and a standard low level outputted from a power supply module, receiving an initial clock signal outputted from a timing control module, and then producing a clock signal for driving a gate driving circuit through processing, but when the display panel is in a high temperature and high humidity environment, a thin film transistor at the gate driving circuit has a technical problem of characteristic drift, so that a voltage level of a signal such as a clock signal is abnormal, a gate scanning signal obtained based on the clock signal is abnormal, thereby causing the thin film transistor to be turned off or turned on to be abnormal, thereby causing conditions such as leakage, and affecting a display effect.
Disclosure of Invention
The driving circuit comprises a power supply module, a time sequence control module, a level conversion module and a grid driving circuit, wherein the time sequence control module outputs an initial grid starting signal and an initial clock signal; the input end of the level conversion module is connected with the output end of the power supply module and is used for receiving an initial gate start signal and an initial clock signal and outputting the gate start signal and the clock signal; the input end of the grid driving circuit is connected with the output end of the level conversion module and is used for receiving the grid starting signal and the clock signal to drive the display panel; the power supply module comprises a detection circuit and an adjusting circuit, wherein the detection circuit detects the condition of an electric signal at the output end of the power supply module and generates detection data; the input end of the adjusting circuit is connected with the output end of the detecting circuit, and the output end of the adjusting circuit is connected with the input end of the level conversion module; the adjusting circuit receives the detection data and outputs a standard high-level signal and a standard low-level signal corresponding to the detection data to the level conversion module according to a preset rule.
Optionally, the adjusting circuit includes a calculating and comparing unit, a control unit and a voltage generating unit, wherein an input end of the calculating and comparing unit is connected to an output end of the detecting circuit, receives the detecting data, and performs calculating and comparing with a preset value to obtain a comparison result; the input end of the control unit is connected with the output end of the calculation comparison unit; the input end of the voltage generating unit is connected with the output end of the control unit, and the output end of the voltage generating unit is connected with the output end of the power supply module; the control unit receives the comparison result and controls the voltage generation unit to generate a standard high-level signal and a standard low-level signal corresponding to the comparison result.
Optionally, the driving circuit further includes a storage unit, an input end of the storage unit is connected to an output end of the control unit, an output end of the storage unit is connected to an input end of the voltage generating unit, the storage unit includes at least two groups of preset codes, and each group of preset codes corresponds to a standard high-level signal and a standard low-level signal with different levels respectively;
the control unit obtains a comparison result of the calculation comparison unit and controls the storage unit to select one group of preset codes according to the comparison result; the voltage generating unit obtains a group of preset codes selected in the storage subunit, and generates a corresponding standard high-level signal and a corresponding standard low-level signal according to the preset codes.
Optionally, the preset code includes a first code and a second code, when the detected data is less than or equal to the preset value, the control unit controls the storage unit to select the first code, and when the detected data is greater than the preset value, the control unit controls the storage unit to select the second code; the control unit controls the voltage generation unit to output a standard high-level signal and a standard low-level signal of a standard level according to the first code; the control unit controls the voltage generating unit to output a standard high-level signal and a standard low-level signal which are lower than a standard level according to the second code.
Optionally, the detection circuit is a current detection circuit, and the current detection circuit is configured to detect an electrical signal condition of an output end of the power supply module and generate current detection data.
Optionally, the driving circuit further includes a protection circuit, the protection circuit detects a real-time current value of the output end of the power supply module, a current threshold is set on the protection circuit, when the protection current detects that the real-time current value is greater than the current threshold, the output end of the power supply module is judged to be in a short circuit state, and the protection circuit controls to turn off the power supply module.
Optionally, the detection circuit is a voltage detection circuit, and the voltage detection circuit is configured to detect an electrical signal condition of an output end of the power supply module and generate voltage detection data.
The application also discloses a driving method which is applied to the driving circuit, and comprises the following steps:
detecting the condition of an electric signal at the output end of the power supply module and generating detection data;
receiving the detection data, and outputting a standard high-level signal and a standard low-level signal corresponding to the detection data to a level conversion module according to a preset rule;
the level conversion module generates a gate start signal and a clock signal according to the initial gate start signal and the initial clock signal received from the time sequence control module and by combining a standard high-level signal and a standard low-level signal;
the gate driving circuit drives the display panel to work according to the gate start signal and the clock signal.
Optionally, the step of receiving the detection data and outputting the standard high-voltage signal and the standard low-voltage signal corresponding to the detection data to the level conversion module according to a preset rule includes:
receiving the detection data, comparing and judging with a preset value to obtain a judging result;
selecting a corresponding preset code according to the judgment result;
and outputting a standard high-level signal and a standard low-level signal corresponding to the preset codes to a level conversion module according to the preset codes.
The application also discloses a display device comprising the driving circuit and a display panel driven by the driving circuit.
Compared with the technical scheme that the standard high-level signal and the standard low-level signal at the grid driving circuit in the display panel cannot be regulated, the detection circuit detects the electric signal condition of the output end of the power supply module to generate detection data, the regulating circuit receives the detection data and can generate the standard high-level signal and the standard low-level signal corresponding to the detection data according to the preset rule and output the standard high-level signal and the standard low-level signal to the level conversion module, and the level conversion module generates the clock signal of the regulated grid starting signal according to the standard high-level signal and the low level, so that even if the thin film transistor is influenced by high temperature and the like, characteristic deviation occurs to change the starting voltage and the closing voltage, even if the voltage level of the power supply module outputs proper standard high level and standard low level is detected and regulated to offset the problem caused by the characteristic deviation, the regulated grid starting signal and the clock signal can be recovered to be normal based on the grid scanning signal obtained by the clock signal, the normal work of the thin film transistor is ensured, the electric leakage risk of the thin film transistor is reduced, and the normal display of a picture is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
fig. 1 is a schematic diagram of a driving circuit of a display panel according to a first embodiment of the present application;
fig. 2 is a schematic diagram of a driving circuit of a display panel according to a second embodiment of the present application;
FIG. 3 is a schematic diagram of a driving circuit according to a third embodiment of the present application;
fig. 4 is a schematic diagram of a driving circuit of a display panel according to a fourth embodiment of the present application;
fig. 5 is a schematic diagram of a driving circuit of a display panel according to a fifth embodiment of the present application;
FIG. 6 is a step diagram of a driving method according to a sixth embodiment of the present application;
fig. 7 is a step diagram of a driving method of a seventh embodiment of the present application;
fig. 8 is a schematic view of a display device according to an eighth embodiment of the present application;
100, a power supply module; 110. a detection circuit; 120. an adjusting circuit; 121. a calculation comparison unit; 122. a control unit; 123. a voltage generating unit; 124. a storage unit; 200. a timing control module; 300. a level conversion module; 400. a gate driving circuit; 500. a display panel; 600. a driving circuit; 700. and a protection circuit.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.
In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The present application will be described in detail below with reference to the drawings and optional embodiments, and it should be noted that, without conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
Fig. 1 is a schematic diagram of a driving circuit of a display panel according to a first embodiment of the present application, and as shown in fig. 1, as the first embodiment of the present application, a driving circuit of a display panel is disclosed, the driving circuit 600 includes a power supply module 100, a timing control module 200, a level conversion module 300, and a gate driving circuit 400, the timing control module 200 outputting an initial gate start signal and an initial clock signal; the input end of the level conversion module is connected to the output end of the power supply module 100, and is used for receiving an initial gate start signal and an initial clock signal and outputting the gate start signal and the clock signal; the input end of the gate driving circuit 400 is connected to the output end of the level conversion module, and is used for receiving the gate start signal and the clock signal to drive the display panel 500; the power supply module 100 includes a detection circuit 110 and an adjustment circuit 120, where the detection circuit 110 detects an electrical signal condition of an output end of the power supply module 100 and generates detection data; the input end of the adjusting circuit 120 is connected to the output end of the detecting circuit 110, and the output end is connected to the input end of the level converting module; the adjustment circuit 120 receives the detection data, and outputs a standard high level signal and a standard low level signal corresponding to the detection data to the level conversion module according to a preset rule.
Compared with the technical scheme that the standard high-level signal and the standard low-level signal at the gate driving circuit in the display panel cannot be regulated, in the application, the detection circuit 110 detects the electric signal condition of the output end of the power supply module 100 and generates detection data, the regulating circuit 120 receives the detection data, generates and outputs the standard high-level signal VGH and the standard low-level signal VGL corresponding to the detection data to the level conversion module according to a preset rule, the standard high-level signal and the standard low-level signal are simultaneously acted on the level conversion module to generate a line scanning clock signal, the corresponding standard high-level signal VGH and the standard low-level signal VGL in the line scanning clock signal better turn off or turn on the TFT Device, the application sets the detection circuit 110 and the regulating circuit 120, the detection circuit 110 detects the electric signal condition output by the power supply module 100 and generates the detection data, the adjusting circuit 120 receives the detection data, generates a standard high-level signal and a standard low-level signal corresponding to the detection data according to a preset rule, and outputs the signals to the level conversion module, and the level conversion module generates a clock signal of an adjusted gate start signal according to the standard high-level signal and the low-level signal, so that even if the thin film transistor is affected by high temperature and the like, characteristic deviation occurs to change the starting voltage and the closing voltage, the power supply module 100 can output proper voltage levels of the standard high-level and the standard low-level to offset the problem caused by the characteristic deviation even if the voltage levels are detected and adjusted, and the adjusted gate start signal and the clock signal, so that a gate scan signal obtained based on the clock signal is recovered to be normal, the normal operation of the thin film transistor is ensured, the leakage risk of the thin film transistor is reduced, ensuring the normal display of the picture.
The detection circuit 110 is a current detection circuit 110, and the current detection circuit 110 is configured to detect an electrical signal condition of an output end of the power supply module 100 and generate current detection data; of course, the detection circuit 110 is a voltage detection circuit 110, the voltage detection circuit 110 is configured to detect an electrical signal at an output end of the power supply module 100, generate voltage detection data, and more quickly determine a change degree of an IV characteristic curve by detecting a real-time change of a current or a voltage, so as to obtain an IV characteristic curve change of the thin film transistor.
Fig. 2 is a schematic diagram of a driving circuit of a display panel according to a second embodiment of the present application, as shown in fig. 2, the present embodiment is a modification of the embodiment shown in fig. 1, and the present embodiment discloses a driving circuit of a display panel, the adjusting circuit 120 includes a calculation comparing unit 121, a control unit 122, and a voltage generating unit 123, an input end of the calculation comparing unit 121 is connected to an output end of the detecting circuit 110, receives the detection data, and performs calculation comparison with a preset value to obtain a comparison result; the input end of the control unit 122 is connected to the output end of the calculation comparing unit 121; the input end of the voltage generating unit 123 is connected to the output end of the control unit 122, and the output end is connected to the output end of the power supply module 100; the control unit 122 receives the comparison result and controls the voltage generation unit 123 to generate a standard high level signal and a standard low level signal corresponding to the comparison result.
Specifically, the detection data obtained by the detection circuit 110 is compared with a preset value by the calculation and comparison unit 121, whether the current thin film transistor is normal is determined by the comparison result, whether the adjustment of the voltage level is performed is determined, three types of results are obtained, namely, the result is bigger, smaller and normal, and the obtained determination result is transmitted to the control unit 122; the preset value is generally a range value, and can be set according to IV characteristic curves of normal operation of the thin film transistors of different panels.
Under normal conditions, the calculation and comparison unit 121 determines that the thin film transistor is in a normal state according to the comparison result, determines that no adjustment of the voltage level is performed, transmits the obtained determination result to the control unit 122, and the control unit 122 selects a normal value of the voltage level according to the determination result and transmits the normal value to the voltage generation unit 123 to generate a voltage.
In an abnormal situation, the calculation and comparison unit 121 determines that the thin film transistor is in an abnormal state according to the comparison result, determines to adjust the voltage level, transmits the obtained determination result to the control unit 122, and the control unit 122 selects an adjustment value of the voltage level according to the determination result, transmits the adjustment value to the voltage generation unit 123 to generate a voltage, and adjusts the voltage level output by the power supply module 100.
The detection circuit 110 detects the condition of the electric signal at the output end of the power supply module 100 and generates detection data, the detection data is transmitted to the calculation comparison unit 121, the calculation comparison unit 121 compares the detection data with a preset value, whether the thin film transistor is normal or not is judged according to the comparison result, whether the adjustment of the voltage level is carried out or not is selected according to the judgment result, the obtained judgment result whether the adjustment is carried out or not is transmitted to the control unit 122, the control unit 122 selects the voltage level value according to the judgment result whether the adjustment is carried out or not, and the voltage value is transmitted to the voltage generation unit 123 to generate a corresponding standard high level signal and a standard low level signal so as to counteract the problem caused by characteristic drift, and the display of the picture of the display panel 500 is normal.
Fig. 3 is a schematic diagram of a driving circuit according to a third embodiment of the present application, and as another embodiment of the present application, the difference between the present embodiment and other embodiments is that a driving circuit is disclosed, the driving circuit 600 includes at least two sets of voltage generating modules 123, the control unit 122 is connected to each voltage generating module 123 through a switching module, and the voltage generating modules 123 are started to output the voltage values stored in the voltage generating modules 123, so that the voltage generating modules 123 can be directly designed according to the prior art without increasing development cost, and the switching modules can be implemented by using a switch or the like.
Further, the detection data detected by the detection circuit 110 is compared with a preset value to obtain a result, and when the result is that the detection data is greater than the preset value, the driving circuit 600 turns on one group of voltage generating modules 123 to output a standard low-level signal and a standard high-level signal corresponding to the detection data; when the detected data is smaller than or equal to the preset value, the driving circuit 600 is connected to another set of voltage generating modules to output the standard low-level signal and the standard high-level signal corresponding to the detected data, so that the levels of the standard low-level signal and the standard high-level signal which are convenient to adjust and output by the driving circuit 600 are set, and the corresponding voltage generating modules are selected to output to switch the levels.
Fig. 4 is a schematic diagram of a driving circuit of a display panel according to a fourth embodiment of the present application, as shown in fig. 4, the driving circuit 600 of the present embodiment is based on a modification of the embodiment shown in fig. 2, and further includes a storage unit 124, an input end of the storage unit 124 is connected to an output end of the control unit 122, an output end of the storage unit 124 is connected to an input end of the voltage generating unit 123, and the storage unit 124 includes at least two sets of preset codes, each set of preset codes corresponds to a standard high level signal and a standard low level signal with different levels, respectively; the control unit 122 obtains the comparison result of the calculation comparison unit 121, and controls the storage unit 124 to select one of the preset codes according to the comparison result; the voltage generating unit 123 obtains a selected group of the preset codes in the storage subunit, and generates a corresponding standard high-level signal and a corresponding standard low-level signal according to the preset codes, so that the standard high-level signal and the standard low-level signal output by the voltage generating unit 123 can be adjusted better to offset the problem caused by the characteristic drift.
The preset codes are at least two groups, each group of preset codes corresponds to different standard high-level signals and standard low-level signals, the number of groups can be selected according to actual conditions, the more the number of groups is, the better the adjusting effect is, and the corresponding cost is higher.
Taking two sets of preset codes as examples, the preset codes include a first code and a second code, when detecting that the detected data is smaller than or equal to a preset value, the control unit 122 controls the storage unit 124 to select the first code, and when detecting that the detected data is larger than the preset value, the control unit 122 controls the storage unit 124 to select the second code; wherein the first code controls the voltage generating unit 123 to output a standard high level signal and a standard low level signal of a standard level; the second code controls the voltage generating unit 123 to output a standard high level signal and a standard low level signal lower than a standard level, and generates a corresponding standard high level signal and a corresponding standard low level signal according to a corresponding preset code, so that the adjustment signal output by the voltage generating unit 123 is more accurate, and the standard level corresponding to the first code is a level when the thin film transistor normally works and does not have an electrical drift problem when the first code is at the standard level;
when the display panel 500 is in a high temperature and high humidity condition, the TFT may have an electrical drift state, the leakage current increases, and the leakage current increases because the level of the scanning signal is higher, so that at a high level, overcharge may be caused, and at a low level, the level may be higher than 0, which may cause the thin film transistor to be turned on, and the leakage current condition occurs, and the level corresponding to the second code is lower, so that the generated standard high level signal and standard low level signal are smaller than those in a normal condition, and offset the voltage increase caused by the high temperature and high humidity, thereby obtaining a standard high level signal and a standard low level signal that can offset the problem caused by the characteristic drift, so that the display panel normally works.
Of course, the preset codes may also include three groups, that is, the preset codes may further include a third code, at this time, the first code corresponds to a case that the detected data is equal to the preset value, the second code corresponds to a case that the detected data is greater than the preset value, the third code corresponds to a case that the detected data is less than the preset value, different preset codes are respectively selected according to the three cases, and corresponding standard low-level signals and standard high-level signals are output, so that the adjustment accuracy is higher.
Of course, only two sets of preset codes may be designed to correspond to three different outputs, specifically, the preset codes include a first code and a second code, and when detecting that the detected data is equal to the preset value, the control unit 122 controls the voltage generating unit 123 to directly output a default standard low level signal and a default standard high level signal corresponding to the normal working state; when the detected data is detected to be smaller than a preset value, the control unit 122 controls the storage unit 124 to select the first code, and the first code controls the voltage generating unit 123 to output a standard low level signal and a standard high level signal corresponding to the detected data; when the detected data is detected to be greater than a preset value, the control unit 122 controls the storage unit 124 to select the second code, and the second code controls the voltage generating unit 123 to output a standard low level signal and a standard high level signal corresponding to the detected data; of course, more preset codes can be set, so that the adjustment precision is higher.
Fig. 5 is a schematic diagram of a driving circuit of a display panel according to a fifth embodiment of the present application, as shown in fig. 5, where the difference between the driving circuit 600 and other embodiments disclosed in the present application is that the driving circuit 600 further includes a protection circuit 700, the protection circuit 700 detects a real-time current value of an output end of the power supply module 100, a current threshold is set on the protection circuit 700, when the protection circuit 700 detects that the real-time current value is greater than the current threshold, it is determined that the output end of the power supply module 100 is in a short-circuit state, and the power supply module 100 is controlled to be turned off.
In this embodiment, when the current exceeds the preset threshold, the protection circuit turns off the driving circuit, at this time, even if the detection circuit detects that the detection current is greater than the preset value, the detection circuit will not control to output the standard high level signal and the standard low level signal corresponding to the situation that the current is greater than the preset value, and because the protection circuit exists, the detection circuit can be relatively simple in calculation, and only needs to calculate that the detection circuit is greater than the preset value, but does not need to be able to detect that the detection circuit is greater than the preset value, and the detection circuit is smaller than or equal to a certain value, and then controls to output the standard high level and the standard low level corresponding to the situation that the current is greater than the preset standard high level signal and the standard low level signal are not corresponding to the preset standard low level signal because the whole driving circuit is not operated when the current is greater than the short circuit, and the preset standard low level signal and the standard high level signal cannot be offset when the detection current is greater than the detection current is not needed.
Fig. 6 is a step diagram of a driving method according to a sixth embodiment of the present application, and as shown in fig. 6, a driving method is disclosed, which is applied to the driving circuit as described above, and includes the steps of:
s01: detecting the condition of an electric signal at the output end of the power supply module and generating detection data;
s02: receiving the detection data, and outputting a standard high-level signal and a standard low-level signal corresponding to the detection data to a level conversion module according to a preset rule;
s03, a level conversion module generates a gate start signal and a clock signal according to the initial gate start signal and the initial clock signal received from the time sequence control module and by combining a standard high-level signal and a standard low-level signal;
s04: the gate driving circuit drives the display panel to work according to the gate start signal and the clock signal.
The method comprises the steps of firstly detecting the electric signal condition of the output end of the power supply module by using a detection circuit, generating corresponding detection data, transmitting the detected detection data to the adjustment circuit, receiving the detection data by the adjustment circuit, and outputting a standard high-level signal and a standard low-level signal corresponding to the detection data to the level conversion module according to a preset rule, so that an adjustment picture is adjusted, and the display of the adjustment picture is normal.
Fig. 7 is a step diagram of a driving method of a seventh embodiment of the present application, and as shown in fig. 7, discloses a driving method of a display panel, comprising the steps of:
s021: receiving the detection data, comparing and judging with a preset value to obtain a judging result;
s022: selecting a preset code corresponding to the detection data according to the judgment result;
s023: and outputting a standard high-level signal and a standard low-level signal corresponding to the preset codes to a level conversion module according to the preset codes.
The method comprises the steps of firstly detecting the electric signal condition of the output end of the power supply module by using a detection circuit, transmitting detected detection data to the calculation comparison unit, wherein a preset value is arranged in the calculation comparison unit, comparing the detection data with the preset value to obtain a judgment result, selecting a preset code corresponding to the detection data according to the judgment result, outputting a standard low-level signal and a standard high-level signal corresponding to the detection data according to the preset code, outputting a corresponding adjustment value, and adjusting the normal display of a picture.
Fig. 8 is a schematic diagram of a display device according to an eighth embodiment of the present application, and as shown in fig. 8, a driving circuit according to any embodiment of the present application, and a display panel driven by the driving circuit are disclosed.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, so long as the implementation of the present solution is possible, all should be considered as falling within the protection scope of the present application.
The technical scheme of the application can be widely applied to various display panels, such as TN (Twisted Nematic) display panels, IPS (In-Plane Switching) display panels, VA (Vertical Alignment) display panels, MVA (Multi-Domain Vertical Alignment) display panels, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panels, can be also applied to the scheme.
It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.
Claims (8)
1. A driving circuit for driving a display panel, the driving circuit comprising:
a power supply module;
the time sequence control module outputs an initial gate start signal and an initial clock signal;
the input end of the level conversion module is connected with the output end of the power supply module and is used for receiving an initial gate start signal and an initial clock signal and outputting the gate start signal and the clock signal; and
the input end of the grid driving circuit is connected with the output end of the level conversion module and is used for receiving the grid starting signal and the clock signal to drive the display panel;
the power supply module is characterized by comprising:
the detection circuit detects the condition of an electric signal at the output end of the power supply module and generates detection data; and
the input end of the adjusting circuit is connected with the output end of the detecting circuit, and the output end of the adjusting circuit is connected with the input end of the level conversion module; the adjusting circuit receives the detection data and outputs a standard high-level signal and a standard low-level signal corresponding to the detection data to the level conversion module according to a preset rule;
the level conversion module generates a clock signal of an adjusted gate start signal according to a standard high-level signal and a standard low-level signal and outputs the clock signal to the gate driving circuit;
the adjusting circuit includes:
the input end of the calculation comparison unit is connected with the output end of the detection circuit, receives the detection data, and performs calculation comparison with a preset value to obtain a comparison result;
the input end of the control unit is connected with the output end of the calculation comparison unit; and
the input end of the voltage generating unit is connected with the output end of the control unit, and the output end of the voltage generating unit is connected with the output end of the power supply module;
the detection circuit is a current detection circuit and is used for detecting the condition of an electric signal at the output end of the power supply module and generating current detection data; the control unit receives the comparison result and controls the voltage generating unit to generate a standard high-level signal and a standard low-level signal corresponding to the comparison result so that the power supply module outputs proper voltage levels of the standard high level and the standard low level to be output to the level conversion module;
the driving circuit further comprises a protection circuit, the protection circuit detects a real-time current value of the output end of the power supply module, a current threshold value is arranged on the protection circuit, when the protection circuit detects that the real-time current value is larger than the current threshold value, the output end of the power supply module is judged to be in a short circuit state, and the protection circuit controls the power supply module to be turned off.
2. The driving circuit according to claim 1, further comprising a memory unit, wherein an input end of the memory unit is connected to an output end of the control unit, an output end of the memory unit is connected to an input end of the voltage generating unit, and the memory unit comprises at least two sets of preset codes, each set of preset codes corresponds to a standard high level signal and a standard low level signal with different levels of alignment respectively;
the control unit obtains a comparison result of the calculation comparison unit and controls the storage unit to select one group of preset codes according to the comparison result;
the voltage generating unit obtains a group of preset codes selected in the storage unit, and generates corresponding standard high-level signals and standard low-level signals according to the preset codes.
3. The drive circuit according to claim 2, wherein the preset code includes a first code and a second code, the control unit controls the storage unit to select the first code when the detection data is detected to be equal to or smaller than the preset value, and controls the storage unit to select the second code when the detection data is detected to be larger than the preset value;
the control unit controls the voltage generation unit to output a standard high-level signal and a standard low-level signal of a standard level according to the first code; the control unit controls the voltage generating unit to output a standard high-level signal and a standard low-level signal which are lower than a standard level according to the second code.
4. The drive circuit according to claim 2, wherein the preset codes include a first code, a second code, and a third code, the control unit controls the storage unit to select the first code when the detected data is detected to be equal to the preset value, and controls the storage unit to select the second code when the detected data is detected to be greater than the preset value; when the detection data is detected to be smaller than the preset value, the control unit controls the storage unit to select the third code;
the control unit controls the voltage generation unit to output a standard high-level signal and a standard low-level signal of a standard level according to the first code; the control unit controls the voltage generating unit to output a standard high-level signal and a standard low-level signal which are lower than a standard level according to the second code; the control unit controls the voltage generating unit to output a standard high-level signal and a standard low-level signal which are higher than a standard level according to the second code.
5. A driving circuit for driving a display panel, the driving circuit comprising:
a power supply module;
the time sequence control module outputs an initial gate start signal and an initial clock signal;
the input end of the level conversion module is connected with the output end of the power supply module and is used for receiving an initial gate start signal and an initial clock signal and outputting the gate start signal and the clock signal; and
the input end of the grid driving circuit is connected with the output end of the level conversion module and is used for receiving the grid starting signal and the clock signal to drive the display panel;
the power supply module is characterized by comprising:
the detection circuit detects the condition of an electric signal at the output end of the power supply module and generates detection data; and
the input end of the adjusting circuit is connected with the output end of the detecting circuit, and the output end of the adjusting circuit is connected with the input end of the level conversion module; the adjusting circuit receives the detection data and outputs a standard high-level signal and a standard low-level signal corresponding to the detection data to the level conversion module according to a preset rule;
the level conversion module generates a clock signal of an adjusted gate start signal according to a standard high-level signal and a standard low-level signal and outputs the clock signal to the gate driving circuit;
the adjusting circuit includes:
the input end of the calculation comparison unit is connected with the output end of the detection circuit, receives the detection data, and performs calculation comparison with a preset value to obtain a comparison result;
the input end of the control unit is connected with the output end of the calculation comparison unit; and
the input end of the voltage generating unit is connected with the output end of the control unit, and the output end of the voltage generating unit is connected with the output end of the power supply module;
the voltage detection circuit is used for detecting the condition of an electric signal at the output end of the power supply module and generating voltage detection data; the calculation and comparison unit receives the voltage detection data and performs calculation and comparison with a preset value to obtain a comparison result; the control unit receives the comparison result and controls the voltage generation unit to generate a standard high-level signal and a standard low-level signal corresponding to the comparison result so that the power supply module outputs proper voltage levels of the standard high level and the standard low level to be output to the level conversion module;
the voltage generating units are provided with two groups, the control unit is connected to each voltage generating unit through a switching module, the control unit receives the comparison result and starts the corresponding voltage generating unit, and the voltage generating unit outputs the stored voltage value to the level conversion module.
6. A driving method applied to a driving circuit according to any one of claims 1 to 5, comprising the steps of:
detecting the condition of an electric signal at the output end of the power supply module and generating detection data;
receiving the detection data, and outputting a standard high-level signal and a standard low-level signal corresponding to the detection data to a level conversion module according to a preset rule;
the level conversion module generates a gate start signal and a clock signal according to the initial gate start signal and the initial clock signal received from the time sequence control module and by combining a standard high-level signal and a standard low-level signal;
the gate driving circuit drives the display panel to work according to the gate start signal and the clock signal.
7. The driving method as claimed in claim 6, wherein the step of receiving the detection data and outputting the standard high signal and the standard low signal corresponding to the detection data to the level conversion module according to a predetermined rule comprises:
receiving the detection data, comparing and judging with a preset value to obtain a judging result;
selecting a corresponding preset code according to the judgment result;
and outputting a standard high-level signal and a standard low-level signal corresponding to the preset codes to a level conversion module according to the preset codes.
8. A display device comprising the drive circuit according to any one of claims 1 to 5, and a display panel driven by the drive circuit.
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| CN114882847B (en) * | 2022-04-29 | 2023-04-25 | 长沙惠科光电有限公司 | Display driving circuit, display driving method and display panel |
| CN115497430B (en) * | 2022-10-19 | 2023-11-24 | 北京京东方显示技术有限公司 | Control circuit and control method of display panel and display device |
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| CN101324715B (en) * | 2007-06-15 | 2011-04-20 | 群康科技(深圳)有限公司 | Liquid crystal display apparatus and drive method thereof |
| KR101745418B1 (en) * | 2010-12-30 | 2017-06-12 | 엘지디스플레이 주식회사 | Power supply unit and liquid crystal display device including the same |
| CN104485078B (en) * | 2014-12-30 | 2016-09-07 | 合肥京东方光电科技有限公司 | Gate driver circuit, display floater and display device |
| CN105070261A (en) * | 2015-08-26 | 2015-11-18 | 武汉华星光电技术有限公司 | Liquid crystal display module group and voltage adjusting method thereof |
| CN105741811B (en) * | 2016-05-06 | 2018-04-06 | 京东方科技集团股份有限公司 | Temperature-compensation circuit, display panel and temperature compensation |
| KR102582656B1 (en) * | 2016-08-31 | 2023-09-25 | 삼성디스플레이 주식회사 | Temperature Compensation Power Circuit For Display Device |
| CN108573681B (en) * | 2017-03-13 | 2020-12-15 | 群创光电股份有限公司 | Display device and driving method thereof |
| CN107424577B (en) * | 2017-08-15 | 2021-01-22 | 京东方科技集团股份有限公司 | Display driving circuit, display device and driving method thereof |
| CN210667755U (en) * | 2019-11-26 | 2020-06-02 | 昆山龙腾光电股份有限公司 | Voltage conversion circuit, liquid crystal panel driving circuit and liquid crystal display |
| CN112509528B (en) * | 2020-11-03 | 2022-06-07 | 重庆惠科金渝光电科技有限公司 | Gate drive circuit, display device and gate drive method of display panel |
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