CN109326247B - Driving circuit, driving method and display device - Google Patents
Driving circuit, driving method and display device Download PDFInfo
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- CN109326247B CN109326247B CN201811534605.3A CN201811534605A CN109326247B CN 109326247 B CN109326247 B CN 109326247B CN 201811534605 A CN201811534605 A CN 201811534605A CN 109326247 B CN109326247 B CN 109326247B
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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Abstract
The application is suitable for the technical field of display, and provides a driving circuit, a driving method and a display device, two paths of same driving data are output under a specific gray scale through a control module, one path of driving data is processed into two paths of same driving voltages and output through a source electrode driving module, the other path of driving data is processed into analog voltage through a digital-to-analog conversion module, the magnitude of one path of driving voltage and the magnitude of the analog voltage are judged through a voltage comparison control module, and when one path of driving voltage is smaller than the analog voltage, the source electrode driving module is controlled to improve the voltage value of the driving voltage, so that the driving voltage and the overcurrent capacity when a data line led out by the source electrode driving module becomes a weak line can be improved, the qualification rate of a display panel can be effectively improved, and the production cost is reduced.
Description
Technical Field
The present application belongs to the field of display technologies, and in particular, to a driving circuit, a driving method, and a display device.
Background
With the development of display technology, display devices such as liquid crystal panels and displays are becoming thinner, larger in screen size, lower in power consumption and lower in cost. Various display devices are developed, and great convenience is brought to daily production and life of people.
However, in the conventional display panel production process, if a foreign object falls into the wiring area of the display panel, the wiring in the area becomes a weak line, the voltage resistance is low, the over-current capability is poor, and the detection is difficult, so that the display panel is scrapped, and the production cost is increased seriously.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a driving circuit, a driving method, and a display device, so as to solve the problems that in a conventional display panel production process, if a foreign object falls into a trace region of a display panel, the trace in the region becomes a weak line, the voltage resistance is low, the over-current capability is poor, and the detection is difficult, so that the display panel is scrapped, and the production cost is seriously increased.
One embodiment of the present application provides a driving circuit, including:
the control module is set to output two paths of same driving data under a specific gray scale;
the source electrode driving module is connected with the first output end of the control module and is used for processing one path of driving data into two paths of same driving voltages and outputting the two paths of same driving voltages;
the digital-to-analog conversion module is connected with the second output end of the control module and is set to process the other path of the driving data into analog voltage; and
and the voltage comparison control module is respectively connected with the first output end and the controlled end of the source electrode driving module and the output end of the digital-to-analog conversion module, is set to judge the sizes of the driving voltage and the analog voltage in one path, and controls the source electrode driving module to increase the voltage value of the driving voltage when the driving voltage in one path is smaller than the analog voltage.
An embodiment of the present application provides a driving method, which is implemented based on the above driving circuit, and the driving method includes:
acquiring one path of the driving voltage and the analog voltage under the specific gray scale;
comparing the magnitude of the driving voltage and the analog voltage;
and when the driving voltage of one path is smaller than the analog voltage, controlling the source electrode driving module to increase the voltage value of the driving voltage.
An embodiment of the present application provides a display device, which includes the above-mentioned driving circuit, and further includes a memory and a computer program stored in the memory and operable on the voltage comparison control module, and the voltage comparison control module implements the steps of the above-mentioned driving method when executing the computer program.
An embodiment of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the above-described driving method.
The embodiment of the application outputs two paths of same driving data under a specific gray scale through the control module, one path of driving data is processed into two paths of same driving voltages through the source electrode driving module and is output, the other path of driving data is processed into analog voltage through the digital-to-analog conversion module, the magnitude of one path of driving voltage and analog voltage is judged through the voltage comparison control module, and when one path of driving voltage is smaller than the analog voltage, the source electrode driving module is controlled to improve the voltage value of the driving voltage, so that the driving voltage and the over-current capacity when a data line led out by the source electrode driving module becomes a weak line can be improved, the qualification rate of the display panel can be effectively improved, and the production cost is reduced.
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 embodiments or the prior art descriptions will be briefly described 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 inventive exercise.
Fig. 1 and fig. 2 are schematic structural diagrams of a driving circuit provided in an embodiment of the present application;
FIG. 3 is a flow chart of a driving method provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
As shown in fig. 1, the present embodiment provides a driving circuit 10 applied to a display device, and the driving circuit includes a control module 1, a source driving module 2, a digital-to-analog conversion module 3, and a voltage comparison control module 4.
In application, the Display device may be any type of Display device, such as an LCD (Liquid crystal Display), an OLED (Organic electroluminescent Display), a QLED (Quantum Dot Light Emitting Diodes) Display device, a curved Display device, or the like.
The control module 1 is configured to output two paths of identical driving data under a specific gray scale.
In Application, the control module may be implemented by a general-purpose Integrated Circuit, such as a CPU (Central processing unit) or an ASIC (Application Specific Integrated Circuit), and may also be a screen driver board (TCON) of the display device.
In one embodiment, the control module is a screen driver board.
In application, when the display panel of the display device displays a full white picture, that is, when the gray scale level of the display panel is 255, it is difficult to detect the occurrence of a dark line caused by the fact that the trace of the display panel becomes a weak line. Therefore, the gray scale level range of a specific gray scale should be controlled to be within a range greater than or equal to 0 gray scale of a full black picture and less than 255 gray scale of a full white picture.
In one embodiment, the specific gray scale has a gray scale level range of 0 to G; wherein G is more than 0 and less than 255 and G is an integer.
In application, the gray scale range of a specific gray scale can be set to any range in the interval of [0, 255 ], for example, 10 to 50, 20 to 60, 5 to 30, etc., according to actual needs.
And the source electrode driving module 2 is connected with the first output end of the control module 1, and is configured to process one path of driving data into two paths of same driving voltages and output the two paths of same driving voltages.
In Application, the source driving module may be any device or Circuit having a function of driving pixels of the display panel, and may be implemented by a general-purpose Integrated Circuit, such as a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit). The Source Driver IC (Source Driver IC) and the thin-film Source Driver IC (S-COF) may be used.
In one embodiment, the source driving module is a source driving chip.
In application, one of the two identical driving voltages output by the source driving module is output to the voltage comparison control module, and the other is output to the display panel for data driving of the display panel.
In one embodiment, the other driving voltage is output to the display panel through the second output end of the source driving module.
And the digital-to-analog conversion module 3 is connected with the second output end of the control module 1 and is configured to process the other path of driving data into an analog voltage.
In Application, the digital-to-analog conversion module may be any device or Circuit having a function of converting a data signal into an analog signal, and may be implemented by a general-purpose Integrated Circuit, such as a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit). Or may be a digital-to-analog conversion chip or a digital-to-analog converter.
In one embodiment, the digital-to-analog conversion module includes a digital-to-analog converter, an input end of the digital-to-analog converter is connected to the second output end of the control module, and an output end of the digital-to-analog converter is an output end of the digital-to-analog conversion module.
And the voltage comparison control module 4 is respectively connected with the first output end and the controlled end of the source electrode driving module 2 and the output end of the digital-to-analog conversion module 3, is set to judge the magnitude of one path of driving voltage and analog voltage, and controls the source electrode driving module 2 to increase the voltage value of the driving voltage when one path of driving voltage is smaller than the analog voltage.
In application, the voltage comparison control module may be any device or Circuit that compares or determines the magnitude of the driving voltage and the analog voltage, and controls the output voltage of the source driving module according to the determined result, and may be implemented by a general Integrated Circuit, such as a CPU (Central Processing Unit), or an ASIC (application specific Integrated Circuit). Voltage comparators and logic devices may also be included.
As shown in fig. 2, in one embodiment, the voltage comparison control module 4 in fig. 1 includes a voltage comparison unit 41 and a control unit 42.
A first input end of the voltage comparing unit 41 is connected to a first output end of the source driving module 2, a second input end of the voltage comparing unit 41 is connected to an output end of the digital-to-analog converting module 3, and the voltage comparing unit 41 is configured to compare a driving voltage and an analog voltage and output a comparison result.
In application, the voltage comparison unit may be any logic device or logic circuit having a voltage comparison function, such as a voltage comparator or a voltage comparison chip. The voltage comparator can select a single-limit comparator, a hysteresis comparator, a window comparator, a tri-state voltage comparator and the like according to actual needs.
In one embodiment, the voltage comparison unit includes a voltage comparator, a non-inverting input terminal of the voltage comparator is a first input terminal of the voltage comparison unit, an inverting input terminal of the voltage comparator is a second input terminal of the voltage comparison unit, and an output terminal of the voltage comparator is an output terminal of the voltage comparison unit.
Fig. 2 schematically shows the case where the voltage comparing unit 41 is a voltage comparator.
In application, the comparison result may be a level signal, a pulse signal, a binary signal, or the like according to the type of the voltage comparison unit.
If the comparison result is a level signal, the comparison result is a high level signal when one driving voltage is smaller than the analog voltage, and the comparison result is a low level signal when one driving voltage is equal to the analog voltage; or the comparison result is a low level signal when one driving voltage is smaller than the analog voltage, and the comparison result is a high level signal when one driving voltage is equal to the analog voltage.
If the comparison result is a pulse signal, the comparison result is a rising edge of the pulse signal when one path of driving voltage is less than the analog voltage, and the comparison result is a falling edge of the pulse signal when one path of driving voltage is equal to the analog voltage; or when one driving voltage is smaller than the analog voltage, the comparison result is the falling edge of the pulse signal, and when one driving voltage is equal to the analog voltage, the comparison result is the rising edge of the pulse signal.
If the comparison result is a binary signal, the comparison result is 0 when one driving voltage is less than the analog voltage, and the comparison result is 1 when one driving voltage is equal to the analog voltage; or, the comparison result is 1 when one driving voltage is smaller than the analog voltage, and the comparison result is 0 when one driving voltage is equal to the analog voltage.
In one embodiment, the comparison result is a binary signal;
when one path of the driving voltage is smaller than the analog voltage, the comparison result is 0;
and when the driving voltage of one path is equal to the analog voltage, the comparison result is 1.
The input end of the control unit 42 is connected to the output end of the voltage comparing unit 41, the output end of the control unit 42 is connected to the controlled end of the source driving module 2, and the control unit 42 is configured to control the source driving module 2 to increase the voltage value of the driving voltage when the comparison result shows that one path of the driving voltage is smaller than the analog voltage.
In application, the control Unit may be any Circuit or device with control function, and may be implemented by a general-purpose Integrated Circuit, such as a CPU (Central Processing Unit), or an ASIC (application specific Integrated Circuit).
As shown in fig. 3, an embodiment of the present application provides a driving method, implemented based on the driving circuit shown in fig. 1 or fig. 2, the driving method may be implemented by a software program in the voltage comparison control module 4, and the driving method includes:
step S301, acquiring one path of the driving voltage and the analog voltage under the specific gray scale;
step S302, comparing the driving voltage and the analog voltage;
step S303, when the driving voltage is smaller than the analog voltage, controlling the source driving module to increase a voltage value of the driving voltage.
In application, steps S301 and S302 may be performed by the voltage comparing unit 41, and step S303 may be performed by the control unit 42.
In one embodiment, the driving method further includes:
and step S304, driving a display panel through the other path of driving voltage so that the display panel displays a picture.
In application, step S304 may be performed by the control module 1 or the source driving module 2.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The embodiment of the application outputs two paths of same driving data under a specific gray scale through the control module, one path of driving data is processed into two paths of same driving voltages through the source electrode driving module and is output, the other path of driving data is processed into analog voltage through the digital-to-analog conversion module, the magnitude of one path of driving voltage and analog voltage is judged through the voltage comparison control module, and when one path of driving voltage is smaller than the analog voltage, the source electrode driving module is controlled to improve the voltage value of the driving voltage, so that the driving voltage and the over-current capacity when a data line led out by the source electrode driving module becomes a weak line can be improved, the qualification rate of the display panel can be effectively improved, and the production cost is reduced.
As shown in fig. 4, an embodiment of the present application provides a display device 100, which includes the driving circuit 10 in fig. 1 or fig. 2, and further includes a memory 20 and a computer program 21, such as a driving program, stored in the memory 20 and operable on the voltage comparison control module 4. When the computer program 21 is executed by the voltage comparison control module 4, the steps in the above-described driving method embodiment, such as steps S301 to S303 shown in fig. 3, are implemented.
Illustratively, the computer program 21 may be partitioned into one or more modules/units, which are stored in the memory 20 and executed by the voltage comparison control module 4 to complete the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 21 in the display device 100. For example, the computer program 21 may be divided into a voltage comparison unit and a control unit, and each unit has the following specific functions:
the voltage comparison unit is used for acquiring one path of driving voltage and the analog voltage under the specific gray scale;
the voltage comparison unit is further used for comparing the driving voltage and the analog voltage;
and the control unit is used for controlling the source electrode driving module to increase the voltage value of the driving voltage when one path of the driving voltage is smaller than the analog voltage.
The display device may include, but is not limited to, a driving circuit 10 and a memory 20. Those skilled in the art will appreciate that fig. 4 is merely an example of the display apparatus 100, and does not constitute a limitation of the display apparatus 100, and may include more or less components than those shown, or combine some components, or different components, for example, the display apparatus may further include an input-output device, a network access device, a bus, etc.
The voltage comparison control module 4 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 20 may be an internal storage unit of the display device 100, such as a hard disk or a memory of the display device 100. The memory 20 may also be an external storage device of the display apparatus 100, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the display apparatus 100. Further, the memory 20 may also include both an internal storage unit and an external storage device of the display apparatus 100. The memory 20 is used for storing the computer program and other programs and data required by the display device. The memory 20 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (9)
1. A driver circuit, comprising:
the control module is set to output two paths of same driving data under a specific gray scale; the gray scale range of the specific gray scale is 0-G; wherein G is more than 0 and less than 255 and is an integer;
the source electrode driving module is connected with the first output end of the control module and is used for processing one path of driving data into two paths of same driving voltages and outputting the two paths of same driving voltages;
the digital-to-analog conversion module is connected with the second output end of the control module and is set to process the other path of the driving data into analog voltage; and
and the voltage comparison control module is respectively connected with the first output end and the controlled end of the source electrode driving module and the output end of the digital-to-analog conversion module, is set to judge the sizes of the driving voltage and the analog voltage in one path, and controls the source electrode driving module to increase the voltage value of the driving voltage when the driving voltage in one path is smaller than the analog voltage.
2. The drive circuit of claim 1, wherein the voltage comparison control module comprises:
a first input end of the voltage comparison unit is connected with a first output end of the source electrode driving module, a second input end of the voltage comparison unit is connected with an output end of the digital-to-analog conversion module, and the voltage comparison unit is configured to compare the driving voltage and the analog voltage and output a comparison result; and
the input end of the control unit is connected with the output end of the voltage comparison unit, the output end of the control unit is connected with the controlled end of the source electrode driving module, and the control unit is set to control the source electrode driving module to increase the voltage value of the driving voltage when the comparison result is that one path of the driving voltage is smaller than the analog voltage.
3. The driving circuit of claim 2, wherein the voltage comparing unit comprises a voltage comparator, a non-inverting input terminal of the voltage comparator is a first input terminal of the voltage comparing unit, an inverting input terminal of the voltage comparator is a second input terminal of the voltage comparing unit, and an output terminal of the voltage comparator is an output terminal of the voltage comparing unit.
4. The drive circuit according to claim 3, wherein the comparison result is a binary signal;
when one path of the driving voltage is smaller than the analog voltage, the comparison result is 0;
and when the driving voltage of one path is equal to the analog voltage, the comparison result is 1.
5. The driving circuit of claim 1, wherein the digital-to-analog conversion module comprises a digital-to-analog converter, an input end of the digital-to-analog converter is connected to the second output end of the control module, and an output end of the digital-to-analog converter is an output end of the digital-to-analog conversion module.
6. The driving circuit as claimed in claim 1, wherein the other driving voltage is outputted to the display panel through the second output terminal of the source driving module.
7. The driving circuit of claim 1, wherein the control module is a panel driving board, and the source driving module is a source driving chip.
8. A driving method implemented by the driving circuit according to any one of claims 1 to 7, the driving method comprising:
acquiring one path of the driving voltage and the analog voltage under the specific gray scale; the gray scale range of the specific gray scale is 0-G; wherein G is more than 0 and less than 255 and is an integer;
comparing the magnitude of the driving voltage and the analog voltage;
and when the driving voltage of one path is smaller than the analog voltage, controlling the source electrode driving module to increase the voltage value of the driving voltage.
9. A display device comprising the driving circuit of any one of claims 1 to 7, further comprising a memory and a computer program stored in the memory and operable on the voltage comparison control module, wherein the voltage comparison control module implements the steps of the driving method of claim 8 when executing the computer program.
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| CN103943077B (en) * | 2013-12-03 | 2017-01-04 | 厦门天马微电子有限公司 | The control method of a kind of display device driving voltage and display device |
| CN105931612B (en) * | 2016-07-13 | 2018-12-21 | 京东方科技集团股份有限公司 | source electrode drive circuit, method and display device |
| CN106297643A (en) * | 2016-10-28 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of source electrode drive circuit, source driving chip and display device |
| CN206595012U (en) * | 2017-02-07 | 2017-10-27 | 深圳市联建光电股份有限公司 | A kind of bright concealed wire control system of the elimination of LED display |
| CN107274847B (en) * | 2017-06-26 | 2023-10-24 | 北京集创北方科技股份有限公司 | Display device, source electrode driving circuit and control method thereof |
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