CN112799541B - Driving circuit and driving method of display panel - Google Patents
Driving circuit and driving method of display panel Download PDFInfo
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- CN112799541B CN112799541B CN202110230690.XA CN202110230690A CN112799541B CN 112799541 B CN112799541 B CN 112799541B CN 202110230690 A CN202110230690 A CN 202110230690A CN 112799541 B CN112799541 B CN 112799541B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- General Physics & Mathematics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Position Input By Displaying (AREA)
Abstract
The embodiment of the application discloses a driving circuit and a driving method of a display panel, wherein the driving circuit of the display panel comprises: a second device for outputting a noise signal when the first device is connected to the first scanning signal and the second device is not connected to the second scanning signal; the second device is also used for outputting an integrated signal when the first device is connected with the first scanning signal and the second device is connected with the second scanning signal; the signal acquisition module is used for acquiring noise signals and integrated signals; and the control module is used for controlling the display panel to respond correspondingly according to the difference value of the voltage of the integrated signal and the voltage of the noise signal. The display panel has both touch control function and light control function, and the noise signal and the integrated signal are collected by the signal collecting module, so that an accurate light control induction signal or the voltage of the accurate touch control induction signal can be obtained, and the problem of mutual interference when the touch control device and the light control device work simultaneously can be effectively solved.
Description
Technical Field
The application relates to the technical field of display, in particular to a driving circuit and a driving method of a display panel.
Background
With the development of display technology, in order to reduce costs, integration of various sensors into a display panel, such as integration of a touch sensor and a light sensor into a display panel, has become a mainstream trend in the industry.
However, in the existing display panel, only the touch sensor or only the light sensor is generally integrated, which cannot meet the touch and light control functions required by the customer.
Disclosure of Invention
The embodiment of the application provides a driving circuit and a driving method of a display panel, which can solve the technical problem that the conventional display panel is generally integrated with only a touch sensor or only a light sensor and cannot simultaneously meet the touch and light control functions required by customers.
In a first aspect, an embodiment of the present application provides a driving circuit of a display panel, where the driving circuit of the display panel includes a driving module, a first device, a second device, a signal acquisition module, and a control module, where the first device is one of a touch device and a light control device, and the second device is the other of the touch device and the light control device;
the driving module is used for providing a first scanning signal for the first device and providing a second scanning signal for the second device;
the second device is used for outputting a noise signal when the first device is connected with the first scanning signal and the second device is not connected with the second scanning signal;
the second device is further configured to output an integrated signal when the first device is connected to the first scan signal and the second device is connected to the second scan signal;
the signal acquisition module is connected with the output end of the second device and is used for acquiring signals output by the second device and outputting voltage signals to the control module according to the acquired signals;
the control module is used for determining the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal, and controlling the display panel to respond correspondingly according to the difference value of the voltage of the integrated signal and the voltage of the noise signal.
Optionally, in some embodiments of the present application, the signal acquisition module is configured to sequentially acquire the noise signal and the integrated signal in one acquisition period;
each acquisition period comprises at least one scanning period, each scanning period comprises a first voltage time period and a second voltage time period, the first device is used for accessing the first scanning signal in the first voltage time period, and the first device is used for stopping accessing the first scanning signal in the second voltage time period;
each acquisition period comprises a second scanning time period, and the second device is used for accessing the second scanning signal in the second scanning time period, wherein the second scanning time period comprises an overlapped time period overlapped with the first voltage time period;
each acquisition period comprises a first time period and a second time period which are sequentially arranged, the signal acquisition module is used for acquiring the noise signals in the first time period and acquiring the integrated signals in the second time period, the first time period is at least partially overlapped with the first voltage time period, the first time period is not overlapped with the overlapped time period, and the second time period comprises the overlapped time period;
wherein a first time period is located before the second scanning time period and a start time of the second time period is located after the start time of the second scanning time period.
Optionally, in some embodiments of the present application, in each of the acquisition periods, the first period of time includes one of the first voltage periods, and the second period of time includes one of the first voltage periods;
wherein the start time of the first period is the same as the start time of one of the first voltage periods, and the start time of the second period is the same as the start time of the other of the first voltage periods.
Optionally, in some embodiments of the present application, in each of the acquisition periods, the first period of time includes a portion of the first voltage period of time and a second period of time including a portion of the first voltage period of time and a second voltage period of time;
wherein the start time of the first period is the same as the start time of one of the second voltage periods, and the start time of the second period is the same as the start time of the other of the second voltage periods.
Optionally, in some embodiments of the present application, in each of the acquisition periods, the first period of time includes a portion of the first voltage period of time and a portion of a second voltage period of time, the second period of time includes a portion of the first voltage period of time and a portion of the second voltage period of time.
Optionally, in some embodiments of the present application, in each of the acquisition periods, the first period is located within one of the first voltage periods, and the second period is located within another of the first voltage periods.
Optionally, in some embodiments of the present application, in each of the acquisition periods, the first time period and the second time period are located within a same first voltage time period.
Optionally, in some embodiments of the present application, the signal acquisition module is configured to determine an acquisition frequency for acquiring the signal output by the second device according to the frequency at which the driving module outputs the first scanning signal after determining the frequency at which the driving module outputs the first scanning signal.
Optionally, in some embodiments of the present application, the signal acquisition module is configured to acquire a signal output by the second device at a fixed acquisition frequency;
wherein a time interval between the adjacent first and second time periods is an integer multiple of the second voltage time period.
In a second aspect, the present application further provides a driving method of a display panel, where the driving circuit of the display panel includes a driving module, a first device, a second device, a signal acquisition module, and a control module, the first device is one of a touch device and a light control device, the second device is the other of the touch device and the light control device, and the driving method of the display panel includes:
s10, the driving module provides a first scanning signal for the first device;
s20, the first device is connected with the first scanning signal, and the second device outputs a noise signal at the moment;
s30, the signal acquisition module acquires the noise signal output by the second device and outputs a voltage signal corresponding to the voltage of the noise signal to the control module;
s40, the driving module provides a first scanning signal for the first device and a second scanning signal for the second device;
s50, the first device is connected with the first scanning signal, and the second device outputs an integrated signal when the first device is connected with the first scanning signal and the second device is connected with the second scanning signal;
s60, the signal acquisition module acquires the integrated signal output by the second device and outputs a voltage signal corresponding to the voltage of the integrated signal to the control module;
and S70, the control module determines the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal corresponding to the voltage of the noise signal and the voltage signal corresponding to the voltage of the integrated signal, and controls the display panel to respond correspondingly according to the difference value of the voltage of the noise signal and the voltage of the integrated signal.
The beneficial effects of the application are as follows: the integrated touch function and the light control function are integrated in the display panel, the display panel is provided with the touch function and the light control function simultaneously, the touch function and the light control function required by customers can be met simultaneously, the display panel can realize the functions of short-range touch control and long-range light control, the composite function of the display panel is improved, noise signals and integrated signals are collected through the signal collecting module, accurate light control induction signals or accurate voltage of the touch control induction signals can be obtained, the touch control device and the light control device can work simultaneously, and the problem of mutual interference of the touch control device and the light control device can be effectively solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a driving circuit of a display panel according to an embodiment of the application;
FIG. 2 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 3 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 4 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 5 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 6 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 7 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 8 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
FIG. 9 is a timing diagram of a signal acquisition module acquiring signals according to an embodiment of the application;
fig. 10 is a schematic diagram illustrating a driving procedure of a display panel according to an embodiment of the application.
Reference numerals illustrate:
10. a driving module; 20. a light control device; 30. a reading module; 31. a signal acquisition module; 32. and a control module.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application.
The embodiment of the application provides a driving circuit and a driving method of a display panel. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.
The application provides a driving circuit of a display panel, as shown in fig. 1, which comprises a driving module 10, a touch device, a light control device 20 and a reading module 30.
Specifically, the driving module 10 is configured to provide a touch scanning signal for the touch device and provide a light-controlled scanning signal for the light-controlled device 20; the touch device is configured to output a touch sensing signal to the reading module 30 when the touch scanning signal is accessed; the light control device 20 is configured to output a light control induction signal to the reading module 30 when the light control scanning signal is accessed; the reading module 30 is configured to control the display panel to respond correspondingly according to the touch sensing signal and the light control sensing signal.
It can be appreciated that the driving module 10 is connected to the touch device and the light control device 20 to control the touch device and the light control device 20 to operate; the touch device is used for sensing touch operation so as to enable the display panel to have a touch function, and the light control device 20 is used for sensing light control operation so as to enable the display panel to have a light control function; the reading module 30 is connected to the touch device and the light control device 20, and is used for reading the touch sensing signal transmitted by the touch device and the light control sensing signal transmitted by the light control device 20.
It should be noted that, by integrating the touch device and the light control device 20 in the display panel at the same time, when the display panel needs to be touched in a short distance, the display panel is touched by a finger or a stylus, and the touch device at a corresponding position on the display panel senses the touch operation and transmits a touch sensing signal to the reading module 30, and the reading module 30 controls the display panel to respond correspondingly according to the touch sensing signal, so as to realize a touch function.
When the display panel needs to be remotely operated, for example, when the display panel is used for displaying in a conference room, a display person transmits a projection beam through a handheld beam emitter and the like, the light control device 20 transmits a light control induction signal to the reading module 30 when sensing the projection beam projected on the display panel, and the reading module 30 controls the display panel to respond correspondingly according to the light control induction signal so as to realize the light control function, and the display panel has the touch control function and the light control function, can simultaneously meet the touch control and the light control functions required by customers, can realize the functions of short-range touch control and long-range light control, and is beneficial to improving the composite function of the display panel.
Specifically, a plurality of light control devices 20 are provided, and a plurality of light control devices 20 are distributed in an array.
Multiple acceptors electrode (RX 1) a plurality of receiving electrodes (RX 1) rx2.a.rx (U)), the transmitting electrodes TX are arranged along the row direction of the light control device 20, and a plurality of transmitting electrodes TX are arranged along the column direction of the light control device 20; the receiving electrodes RX are arranged along the column direction of the light control device 20, and a plurality of receiving electrodes RX are arranged along the row direction of the light control device 20; the transmitting electrode TX is connected to the driving module 10, and the transmitting electrode TX is used for accessing a touch scanning signal provided by the driving module 10.
It should be noted that, the transmitting electrode TX and the receiving electrode RX are located at different layers, the touch device is a mutual capacitance type touch device, a touch capacitance is formed at the intersection of the transmitting electrode TX and the receiving electrode RX, the transmitting electrode TX is used for accessing a touch scanning signal and transmitting an electric signal, and the receiving electrode RX outputs a corresponding touch sensing signal according to the capacitance of the touch capacitance. When a display panel is touched by a finger or a touch pen and other equipment, the capacitance of a touch capacitor formed by a transmitting electrode TX and a receiving electrode RX at a touch position changes, the receiving electrode RX sends a corresponding touch sensing signal to a reading module 30, and the reading module 30 determines a touch point according to the touch sensing signal and controls the display panel to respond correspondingly.
Specifically, the drive circuit of the display panel further includes a plurality of scanning lines (Gate 1, gate 2..gate (U)) and a plurality of signal reading lines (S1, S2..s (U)), the scanning lines Gate are arranged in the row direction of the photocontrol device 20, and the signal reading lines S are arranged in the column direction of the photocontrol device 20.
The scan lines Gate are connected to the driving module 10, and are used for transmitting the light-controlled scan signals to the light-controlled devices 20, and one scan line Gate is correspondingly connected to one row of the light-controlled devices 20.
The signal reading line S is connected to the reading module 30, and is used for transmitting a light-operated sensing signal to the reading module 30, and one signal reading line S is correspondingly connected to one row of light-operated devices 20.
It should be noted that, the scan line Gate and the transmitting electrode TX are disposed in the same direction, and the scan line Gate and the transmitting electrode TX may be disposed in the same layer, and at this time, the scan line Gate and the transmitting electrode TX are disposed at intervals; the signal reading line S and the receiving electrode RX are arranged in the same direction, and the signal reading line S and the receiving electrode RX may be located at the same layer, and at this time, the signal reading line S and the receiving electrode RX are arranged at intervals.
It should be noted that, the light control device 20 may include a light control transistor, the Gate electrode of the light control transistor is connected to the scan line Gate, the source electrode of the light control transistor is connected to a power voltage, the drain electrode of the light control transistor is connected to the signal reading line S, when the Gate electrode of the light control transistor receives the light control scan signal, the light control transistor is turned on, and the reading module 30 reads the light control sensing signal through the signal reading line S and controls the display panel to generate a corresponding response.
For convenience of description of driving the display panel, one of the touch device and the light control device 20 is hereinafter referred to as a first device, and the other of the touch device and the light control device 20 is referred to as a second device, i.e., the first device is one of the touch device and the light control device 20, and the second device is the other of the touch device and the light control device 20.
The scanning signal provided by the driving module 10 to the first device is hereinafter also referred to as a first scanning signal, and the scanning signal provided to the second device is referred to as a second scanning signal, i.e. the driving module 10 is configured to provide the first scanning signal to the first device and to provide the second scanning signal to the second device; at this time, the first scanning signal is one of a touch scanning signal and a light-operated scanning signal, and the second scanning signal is the other one of the touch scanning signal and the light-operated scanning signal. If the first device is a touch device and the second device is a light control device 20, the first scanning signal is a touch scanning signal and the second scanning signal is a light control scanning signal; and the first device is the light control device 20, and the second device is the touch control device, the first scanning signal is the light control scanning signal, and the second scanning signal is the touch control scanning signal.
Specifically, the second device is configured to output a noise signal when the first device is connected to the first scanning signal and the second device is not connected to the second scanning signal.
The second device is further configured to output an integrated signal when the first device is connected to the first scan signal and the second device is connected to the second scan signal.
It can be understood that, taking the first device as a touch device, and taking the second device as the light control device 20 as an example, when the first device and the second device operate simultaneously, because there is an overlapping portion between the transmitting electrode TX and the signal reading line S, a parasitic capacitance is formed between the transmitting electrode TX and the signal reading line S at the overlapping portion, when the transmitting electrode TX is connected to the first scanning signal, an electrical signal is transmitted to the receiving electrode RX, so that charges are charged into the parasitic capacitance, and the charges on the parasitic capacitance interfere with the signal output by the second device, so that the signal output by the second device contains a noise signal, thereby causing adverse interference to the light control function.
It should be noted that, when the first device is connected to the first scanning signal and the second device is not connected to the second scanning signal, the signal output by the second device is only a noise signal caused by the interference of the first device to the second device, and when the first device is connected to the first scanning signal and the second device is connected to the second scanning signal, the signal output by the second device includes an accurate light-operated sensing signal and a noise signal, that is, the integrated signal includes an accurate light-operated sensing signal and a noise signal.
Specifically, the reading module 30 includes a signal acquisition module 31 and a control module 32.
The signal acquisition module 31 is connected to the output end of the second device, and is configured to acquire a signal output by the second device, and output a voltage signal AFE to the control module 32 according to the acquired signal.
It should be noted that, the signal collection module 31 may be an Analog Front End (AFE), where the Analog Front End includes a plurality of collection channels, each collection channel includes an integrator and a correlated double sampling (Correlated Double Sample, CDS), and may collect the charge amount of the input channel, that is, collect the signal output by the second device, and may output a corresponding voltage signal AFE according to the collected signal, for example, the voltage of the signal output by the second device is 5V, and after the signal collection module 31 collects the signal output by the second device, output the voltage signal AFE of 5V.
The control module 32 is configured to determine the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal AFE, and control the display panel to respond correspondingly according to the difference between the voltage of the integrated signal and the voltage of the noise signal.
It can be understood that the difference between the voltage of the integrated signal and the voltage of the noise signal is the voltage of the accurate light-controlled sensing signal or the accurate touch sensing signal, and the noise signal and the integrated signal are collected by the signal collecting module 31, so that the accurate light-controlled sensing signal or the accurate voltage of the touch sensing signal can be obtained, the touch device and the light-controlled device 20 can work simultaneously, and the problem of mutual interference between the touch device and the light-controlled device 20 can be effectively solved.
As shown in fig. 2 to 9, fig. 2 to 9 are schematic diagrams of driving timing of the display panel when the first device is a touch device and the second device is a light control device 20.
As shown in fig. 2 to 8, specifically, the signal acquisition module 31 is configured to sequentially acquire the noise signal and the integrated signal in one acquisition period Tc.
It should be noted that, the collection period Tc is a period of time for the signal collection module 31 to complete one collection task, and one collection task includes two collection actions, namely, a collection action for collecting a noise signal and a collection action for collecting an integrated signal.
Each acquisition period Tc includes at least two scan periods Tr, each scan period Tr includes a first voltage period Th and a second voltage period Tl, the first device is configured to access the first scan signal in the first voltage period Th, and the first device is configured to stop access of the first scan signal in the second voltage period Tl.
It should be noted that, the scan period Tr refers to a period from when the transmitting electrode TX connected to the first device starts to be connected to the nth first scan signal to when the n+1th first scan signal starts to be connected to the first device, the first voltage period Th and the second voltage period Tl are alternately arranged, and voltages of all the first scan signals in all the scan periods Tr are the same, the first voltage period Th may be a high voltage period, and at this time, the second voltage period Tl is a low voltage period, and n is a positive integer greater than or equal to 1.
Each acquisition period Tc includes a second scanning period Ts2, and the second device is configured to access the second scanning signal in the second scanning period Ts2, where the second scanning period Ts2 includes an overlapping period that coincides with the first voltage period Th.
It is understood that the period of time during which the second device outputs the integrated signal is within the overlap period of time.
Each collecting period Tc includes a first period T1 and a second period T2 that are sequentially arranged, the signal collecting module 31 is configured to collect the noise signal in the first period T1, and is configured to collect the integrated signal in the second period T2, where the first period T1 at least partially coincides with the first voltage period Th, the first period T1 does not overlap with the overlapping period, and the second period T2 includes the overlapping period.
It is understood that the first period T1 and the second period T2 are periods during which the signal acquisition module 31 outputs the voltage signal AFE.
The first period T1 is located before the second scanning period Ts2, and the start time of the second period T2 is located after the start time of the second scanning period Ts2, so as to fully sample the noise signal and the integrated signal, and simultaneously avoid mutual interference between the collection of the noise signal and the collection of the integrated signal.
In an embodiment, the ending time of the second period T2 coincides with the ending time of the second scanning period Ts2, so as to further ensure that the integrated signal is sufficiently sampled.
As shown in fig. 2, in an embodiment, in each of the acquisition periods Tc, the first period T1 includes one of the first voltage periods Th, and the second period T2 includes one of the first voltage periods Th.
The starting time of the first period T1 is the same as the starting time of one first voltage period Th, and the starting time of the second period T2 is the same as the starting time of the other first voltage period Th.
It can be understood that, in one acquisition period Tc, the signal acquisition module 31 starts to acquire a noise signal when detecting a rising edge of one first scanning signal, outputs a voltage signal AFE corresponding to the noise signal, and then starts to acquire an integrated signal after detecting a rising edge of another first scanning signal, and outputs a voltage signal AFE corresponding to the integrated signal, and the signal acquisition module 31 fully acquires the noise signal and the integrated signal, so that the acquisition result is more accurate.
As shown in fig. 3, in an embodiment, in each of the acquisition periods Tc, the first period T1 includes a portion of the first voltage period Th and a second voltage period Tl, and the second period T2 includes a portion of the first voltage period Th and a second voltage period Tl.
Wherein, the start time of the first period T1 is the same as the start time of one of the second voltage periods Tl, and the start time of the second period T2 is the same as the start time of the other of the second voltage periods Tl.
It should be noted that, the first period T1 and the second period T2 only partially overlap with one first voltage period Th, so that the influence of the two related samples of the signal acquisition module 31 caused by saturation can be avoided.
It should be noted that, in fig. 2 and fig. 3, only the signal output by the second device before and after the inversion of the first scan signal is illustrated, as shown in fig. 4, only the signal output by the second device before or after the inversion of the first scan signal may be sampled.
As shown in fig. 4, in an embodiment, in each of the acquisition periods Tc, the first period T1 includes a portion of the first voltage period Th and a portion of the second voltage period Tl, and the second period T2 includes a portion of the first voltage period Th and a portion of the second voltage period Tl.
It can be understood that, in fig. 4, AFE1, AFE2 and AFE3 represent timing diagrams when the signal acquisition module 31 samples different timings for sampling, and the sampling timing of the signal acquisition module 31 depends on the actual situations such as the signal frequency, the duty cycle of the first scanning signal, and the sampling time of the signal acquisition module 31, and is not limited to use of one or several timings.
As shown in fig. 5, in each of the acquisition periods Tc, the first period T1 is located in one of the first voltage periods Th, and the second period T2 is located in the other of the first voltage periods Th.
As shown in fig. 6, in each of the acquisition periods Tc, the first period T1 and the second period are located in the same first voltage period Th.
In an embodiment, the signal acquisition module 31 is configured to determine, after determining the frequency at which the driving module 10 outputs the first scanning signal, an acquisition frequency for acquiring the signal output by the second device according to the frequency at which the driving module 10 outputs the first scanning signal.
It should be noted that, by detecting an edge of the first scan signal, that is, detecting a time before and after the inversion of the first scan signal, a frequency at which the driving module 10 outputs the first scan signal may be determined.
In an embodiment, as shown in fig. 7 and fig. 8, if the signal frequency and the duty cycle of the first scanning signal are fixed, it is also possible to determine the frequency of the driving module 10 outputting the first scanning signal without detecting the edge of the first scanning signal, and the signal acquisition module 31 may directly use the fixed sampling frequency for sampling.
Specifically, the signal acquisition module 31 is configured to acquire the signal output by the second device at a fixed acquisition frequency.
The time interval between the adjacent first time period T1 and the second time period T2 is an integer multiple of the second voltage time period Tl, so that when the signal acquisition module 31 performs sampling at a fixed acquisition frequency, the noise signal and the integrated signal can be acquired in each sampling period.
As shown in fig. 7, when the sum of the first period T1 and the second period T2 is smaller than two scan periods Tr, the time interval between the adjacent first period T1 and second period T2 is equal to the second voltage period Tl.
As shown in fig. 8, when the sum of the first period T1 and the second period T2 is smaller than two scan periods Tr, the time interval between the adjacent first period T1 and second period T2 is equal to an integer multiple of the second voltage period Tl.
It should be noted that, in fig. 7, AFE1, AFE2 and AFE3 represent timing diagrams when the signal acquisition module 31 samples different timings for sampling, and in fig. 8, AFE1 and AFE2 represent timing diagrams when the signal acquisition module 31 samples different timings for sampling.
Note that, fig. 2 to 8 are timing diagrams illustrating only the case where the first scan signal is concentrated on one scan line Gate.
As shown in fig. 9, it may be further configured that one frame time includes a plurality of first scanning periods Ts1, the plurality of first scanning periods Ts1 are sequentially arranged, each of the first scanning periods Ts1 includes m scanning periods Tr, each of the transmitting electrodes TX accesses the first scanning signal in one of the first scanning periods Ts1, and m is an even number.
When one scan line Gate completes the signal scanning operation, m/2 scan lines Gate complete the scanning operation, and the signal acquisition module 31 completes the acquisition task m/2 times.
Taking an example that the first scanning period Ts1 includes 4 scanning periods Tr, when the first scanning line Gate completes the signal scanning operation, the first scanning line Gate and the second scanning line Gate complete the scanning operation, the signal acquisition module 31 completes 2 acquisition tasks, acquires accurate light-operated sensing signals of the first row of light-operated devices 20 and the second row of light-operated devices 20, and then when the second scanning line Gate completes the signal scanning operation, the third scanning line Gate and the fourth scanning line Gate complete the scanning operation, the signal acquisition module 31 completes two acquisition tasks, acquires accurate light-operated sensing signals of the third row of light-operated devices 20 and the fourth row of light-operated devices 20, and so on, thereby completing signal acquisition of all rows of light-operated devices 20.
It should be noted that, in fig. 2 to 9, only schematic diagrams of the case where the first device is a touch device and the second device is a light control device 20 are illustrated, and when the first device is the light control device 20 and the second device is a touch device, only the timing diagram of the original receiving electrode RX in fig. 2 to 9 needs to be replaced with the timing diagram of the scanning line Gate, and the timing diagram of the original scanning line Gate needs to be replaced with the timing diagram of the receiving electrode RX.
Based on the driving circuit of the display panel, the application also provides a driving method of the display panel, and the driving circuit of the display panel can drive the display panel through the driving method of the display panel.
Specifically, as shown in fig. 10, the driving circuit of the display panel includes a driving module 10, a first device, a second device, a signal acquisition module 31 and a control module 32, where the first device is one of a touch device and a light control device 20, and the second device is the other of the touch device and the light control device 20, and the driving method of the display panel includes:
s10, the driving module 10 provides a first scanning signal for the first device;
s20, the first device is connected with the first scanning signal, and the second device outputs a noise signal at the moment;
s30, the signal acquisition module 31 acquires the noise signal output by the second device and outputs a voltage signal AFE corresponding to the voltage of the noise signal to the control module 32;
s40, the driving module 10 provides a first scanning signal for the first device and a second scanning signal for the second device;
s50, the first device is connected with the first scanning signal, and the second device outputs an integrated signal when the first device is connected with the first scanning signal and the second device is connected with the second scanning signal;
s60, the signal acquisition module 31 acquires the integrated signal output by the second device and outputs a voltage signal AFE corresponding to the voltage of the integrated signal to the control module 32;
and S70, the control module 32 determines the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal AFE corresponding to the voltage of the noise signal and the voltage signal AFE corresponding to the voltage of the integrated signal, and controls the display panel to respond correspondingly according to the difference value of the voltage of the noise signal and the voltage of the integrated signal.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (9)
1. The driving circuit of the display panel is characterized by comprising a driving module, a first device, a second device, a signal acquisition module and a control module, wherein the first device is one of a touch device and a light control device, and the second device is the other of the touch device and the light control device;
the driving module is used for providing a first scanning signal for the first device and providing a second scanning signal for the second device;
the second device is used for outputting a noise signal when the first device is connected with the first scanning signal and the second device is not connected with the second scanning signal;
the second device is further configured to output an integrated signal when the first device is connected to the first scan signal and the second device is connected to the second scan signal;
the signal acquisition module is connected with the output end of the second device and is used for acquiring signals output by the second device and outputting voltage signals to the control module according to the acquired signals, and the signal acquisition module is used for sequentially acquiring the noise signals and the integrated signals in one acquisition period;
each acquisition period comprises at least one scanning period, each scanning period comprises a first voltage time period and a second voltage time period, the first device is used for accessing the first scanning signal in the first voltage time period, and the first device is used for stopping accessing the first scanning signal in the second voltage time period;
each acquisition period comprises a second scanning time period, and the second device is used for accessing the second scanning signal in the second scanning time period, wherein the second scanning time period comprises an overlapped time period overlapped with the first voltage time period;
each acquisition period comprises a first time period and a second time period which are sequentially arranged, the signal acquisition module is used for acquiring the noise signals in the first time period and acquiring the integrated signals in the second time period, the first time period is at least partially overlapped with the first voltage time period, the first time period is not overlapped with the overlapped time period, and the second time period comprises the overlapped time period;
wherein a first time period is located before the second scanning time period and a start time of the second time period is located after the start time of the second scanning time period;
the control module is used for determining the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal, and controlling the display panel to respond correspondingly according to the difference value of the voltage of the integrated signal and the voltage of the noise signal.
2. The driving circuit of a display panel according to claim 1, wherein the first period of time includes one of the first voltage periods of time and the second period of time includes one of the first voltage periods of time in each of the acquisition periods;
wherein the start time of the first period is the same as the start time of one of the first voltage periods, and the start time of the second period is the same as the start time of the other of the first voltage periods.
3. The driving circuit of a display panel according to claim 1, wherein in each of the collection periods, the first period of time includes a portion of the first voltage period of time and a second period of time, the second period of time includes a portion of the first voltage period of time and a second period of time;
wherein the start time of the first period is the same as the start time of one of the second voltage periods, and the start time of the second period is the same as the start time of the other of the second voltage periods.
4. The driving circuit of a display panel according to claim 1, wherein the first period of time includes a portion of the first voltage period of time and a portion of the second voltage period of time within each of the acquisition periods, the second period of time including a portion of the first voltage period of time and a portion of the second voltage period of time.
5. The driving circuit of a display panel according to claim 1, wherein in each of the acquisition periods, the first period is located in one of the first voltage periods, and the second period is located in the other of the first voltage periods.
6. The driving circuit of a display panel according to claim 1, wherein the first period and the second period are located in the same first voltage period in each of the acquisition periods.
7. The driving circuit of the display panel according to claim 1, wherein the signal acquisition module is configured to determine an acquisition frequency for acquiring the signal output by the second device according to the frequency at which the driving module outputs the first scanning signal after determining the frequency at which the driving module outputs the first scanning signal.
8. The driving circuit of the display panel according to claim 1, wherein the signal acquisition module is configured to acquire the signal output by the second device at a fixed acquisition frequency;
wherein a time interval between the adjacent first and second time periods is an integer multiple of the second voltage time period.
9. The driving method of the display panel is characterized in that the driving circuit of the display panel comprises a driving module, a first device, a second device, a signal acquisition module and a control module, wherein the first device is one of a touch device and a light control device, the second device is the other of the touch device and the light control device, and the driving method of the display panel comprises the following steps:
s10, the driving module provides a first scanning signal for the first device;
s20, the first device is connected with the first scanning signal, and the second device outputs a noise signal at the moment;
s30, the signal acquisition module acquires the noise signal output by the second device and outputs a voltage signal corresponding to the voltage of the noise signal to the control module;
s40, the driving module provides a first scanning signal for the first device and a second scanning signal for the second device;
s50, the first device is connected with the first scanning signal, and the second device outputs an integrated signal when the first device is connected with the first scanning signal and the second device is connected with the second scanning signal;
s60, the signal acquisition module acquires the integrated signal output by the second device and outputs a voltage signal corresponding to the voltage of the integrated signal to the control module;
the signal acquisition module acquires the noise signal and the integrated signal in sequence in one acquisition period;
each acquisition period comprises at least one scanning period, each scanning period comprises a first voltage time period and a second voltage time period, the first device is used for accessing the first scanning signal in the first voltage time period, and the first device is used for stopping accessing the first scanning signal in the second voltage time period;
each acquisition period comprises a second scanning time period, and the second device is used for accessing the second scanning signal in the second scanning time period, wherein the second scanning time period comprises an overlapped time period overlapped with the first voltage time period;
each acquisition period comprises a first time period and a second time period which are sequentially arranged, the signal acquisition module is used for acquiring the noise signals in the first time period and acquiring the integrated signals in the second time period, the first time period is at least partially overlapped with the first voltage time period, the first time period is not overlapped with the overlapped time period, and the second time period comprises the overlapped time period;
wherein a first time period is located before the second scanning time period and a start time of the second time period is located after the start time of the second scanning time period;
and S70, the control module determines the voltage of the noise signal and the voltage of the integrated signal according to the voltage signal corresponding to the voltage of the noise signal and the voltage signal corresponding to the voltage of the integrated signal, and controls the display panel to respond correspondingly according to the difference value of the voltage of the noise signal and the voltage of the integrated signal.
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| CN101309360A (en) * | 2007-05-17 | 2008-11-19 | 索尼株式会社 | Video input processor, imaging signal-processing circuit, and method for reducing noises in imaging signals |
| WO2017166342A1 (en) * | 2016-03-31 | 2017-10-05 | 山东大学 | Shield-carried, non-contact, real-time, advanced frequency domain electrical exploration system and method |
| CN112259581A (en) * | 2020-10-15 | 2021-01-22 | 深圳市华星光电半导体显示技术有限公司 | Control assembly, display screen and control device |
| CN112363642A (en) * | 2020-12-08 | 2021-02-12 | 深圳市华星光电半导体显示技术有限公司 | Photoinduction display circuit and display panel |
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| KR20200141861A (en) * | 2019-06-11 | 2020-12-21 | 주식회사 하이딥 | Touch apparatus and driving method thereof |
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| CN101309360A (en) * | 2007-05-17 | 2008-11-19 | 索尼株式会社 | Video input processor, imaging signal-processing circuit, and method for reducing noises in imaging signals |
| WO2017166342A1 (en) * | 2016-03-31 | 2017-10-05 | 山东大学 | Shield-carried, non-contact, real-time, advanced frequency domain electrical exploration system and method |
| CN112259581A (en) * | 2020-10-15 | 2021-01-22 | 深圳市华星光电半导体显示技术有限公司 | Control assembly, display screen and control device |
| CN112363642A (en) * | 2020-12-08 | 2021-02-12 | 深圳市华星光电半导体显示技术有限公司 | Photoinduction display circuit and display panel |
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