CN113672121A - Display device and driving method thereof - Google Patents
Display device and driving method thereof Download PDFInfo
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- CN113672121A CN113672121A CN202110909546.9A CN202110909546A CN113672121A CN 113672121 A CN113672121 A CN 113672121A CN 202110909546 A CN202110909546 A CN 202110909546A CN 113672121 A CN113672121 A CN 113672121A
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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
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
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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
- G06F3/044—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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- 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
Abstract
The invention discloses a display device and a driving method thereof, wherein the display device comprises a touch panel and a display panel which are oppositely arranged, the touch panel also comprises a first driving chip and a noise judgment module, and the display panel comprises a display driving self-adaptive module; when the display panel displays, the first driving chip acquires a noise value and a first touch signal of the touch panel and synchronously sends the noise value and the first touch signal to the noise judgment module; receiving a first touch signal and a noise value sent by a first driving chip, judging that the noise value is greater than a noise value threshold value, and outputting a driving signal to a display driving self-adaptive module; the display driving self-adaptive module receives the driving signal sent by the noise judgment module, selects the display parameters and adjusts the display panel until the noise value of the touch panel is smaller than the noise value threshold. According to the invention, the noise influence of the display panel on the touch panel is reduced by adjusting the parameters of the display panel, and the problem of touch misjudgment is reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a driving method thereof.
Background
With the development of display technology, the functions of display products are more and more diversified, so as to meet the use requirements of different users and different scenes. The display product with the touch function has the advantages of simple and quick operation, rich functions, strong interactivity with users and the like, and is favored by the users.
In the conventional method for detecting a touch event by a touch panel, a driver sends a driving signal to an induction electrode on the touch panel, the driving signal generates an induction signal on the induction electrode, and when a finger touches or approaches the touch panel, the capacitance of the induction electrode corresponding to the position of the touch event changes, so that the induction signal generated by the induction electrode changes, and thus the occurrence and the position of the touch event can be detected.
However, with aging, high and low temperatures, process fluctuations, and different display frames, the high frequency signal of the display panel is coupled to the touch panel due to electromagnetic induction, which generates noise on the touch panel, affects the accuracy of the touch panel in detecting a touch event, and causes erroneous determination.
Disclosure of Invention
In view of the above, the present invention provides a display device and a driving method thereof, which reduce the noise impact of a display panel on a touch panel by adjusting parameters of the display panel, and reduce the problem of touch misjudgment.
The present invention provides a display device including: the display panel comprises a display driving self-adaptive module and a first driving chip, wherein the display driving self-adaptive module is connected with the display driving self-adaptive module;
the first driving chip is respectively connected with the display panel and the noise judging module, and when the display panel displays, the first driving chip acquires a noise value and a first touch signal of the touch panel and synchronously sends the first touch signal and the noise value to the noise judging module;
the noise judging module is respectively connected with the noise judging module and the display driving self-adaptive module, receives the first touch signal and the noise value sent by the noise judging module, judges that the noise value is greater than a noise value threshold value, and outputs a driving signal to the display driving self-adaptive module;
the display driving self-adaptive module is connected with the noise judging module, receives the driving signal sent by the noise judging module, selects display parameters and adjusts the display panel until the noise value of the touch panel is smaller than the noise value threshold.
In another aspect, the present invention further provides a driving method of a display device, including the steps of:
acquiring a noise value and a first touch signal of the touch panel, and synchronously sending the first touch signal and the noise value;
receiving the first touch signal and the noise value, judging that the noise value is greater than a noise value threshold value, and outputting a driving signal;
receiving the driving signal, selecting display parameters and adjusting the display panel;
and when the display panel displays, re-acquiring the noise value of the touch panel, and circulating the steps until the noise value of the touch panel is smaller than the noise value threshold.
Compared with the prior art, the invention provides a display device and a driving method thereof, wherein the display device comprises a touch panel and a display panel which are oppositely arranged, the touch panel also comprises a first driving chip and a noise judgment module, and the display panel comprises a display driving self-adaptive module; the first driving chip is respectively connected with the display panel and the noise judging module, and when the display panel displays, the first driving chip acquires a noise value and a first touch signal of the touch panel and synchronously sends the first touch signal and the noise value to the noise judging module; the noise judging module is respectively connected with the first driving chip and the display driving self-adaptive module, receives a first touch signal and a noise value sent by the first driving chip, judges that the noise value is greater than a noise value threshold value, and outputs a driving signal to the display driving self-adaptive module; the display driving self-adaptive module is connected with the noise judging module, receives the driving signal sent by the noise judging module, selects the display parameters and adjusts the display panel until the noise value of the touch panel is smaller than the noise value threshold. The invention provides a display device and a driving method thereof, wherein when a high-frequency signal generated when a display panel displays generates noise on a touch panel, whether the noise value is larger than a noise value threshold value or not is judged, and when the acquired noise value is larger than the noise value threshold value, the influence of the display panel on the noise value of the touch panel is reduced by adjusting a preset display parameter in the display panel until the noise value of the touch panel is smaller than the noise value threshold value, so that the problem of touch misjudgment can be reduced in a touch stage after the display stage.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a display device according to the prior art;
fig. 2 is a schematic structural diagram of a display device provided in the present application;
FIG. 3 is a cross-sectional view taken along line G-G' of FIG. 2;
fig. 4 is a schematic structural diagram of a touch panel provided in the present application;
FIG. 5 is a schematic structural diagram of another display device provided in the present application;
fig. 6 is a timing diagram of touch control of a display device according to the present disclosure;
fig. 7 is a timing diagram of touch control of another display device provided in the present application;
fig. 8 is a schematic structural diagram of another display device provided in the present application;
fig. 9 is a schematic structural diagram of another display device provided in the present application;
FIG. 10 is a flowchart illustrating a driving method of a display device according to the present disclosure;
fig. 11 is a flowchart of another driving method of a display device according to the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device in the prior art. The prior art provides a display device 100, which includes a touch panel 01 and a display panel 02 that are disposed opposite to each other, wherein the touch panel 01 includes a touch driving chip 011, the display panel 02 includes a display driving chip 021, and the touch panel 01 and the display panel 02 are connected to each other, and the connection may be only an electrical connection, other connections such as a mechanical connection, or a physical connection, as long as signal transmission can be ensured.
However, touch sensing is easily affected by noise interference, which may easily cause a problem of touch misjudgment. Typical noise sources include driving of the display panel 02, and as the usage time is aged, high and low temperatures, process fluctuations, and different display images, a high-frequency signal of the display panel 02 is coupled to the touch panel 01 due to electromagnetic induction, thereby generating noise on the touch panel 01, affecting the accuracy of the touch panel 01 for detecting a touch event, and causing problems such as erroneous determination.
The above description only uses the capacitive type as an example, but the specific structure and the working principle of the touch detection unit may be various, for example, the touch detection unit may also be a resistive type or an inductive type, which is not limited in this embodiment.
In order to solve the above technical problems, the present invention provides a display device and a driving method thereof. Embodiments of the display device and the driving method thereof according to the present invention will be described in detail below.
In this embodiment, referring to fig. 2 to 5, fig. 2 is a schematic structural diagram of a display device provided in the present application, fig. 3 is a cross-sectional view along direction G-G' in fig. 2, fig. 4 is a schematic structural diagram of a touch panel provided in the present application, and fig. 5 is a schematic structural diagram of another display device provided in the present application. The display device 200 provided in the present embodiment: the display device comprises a touch panel 10 and a display panel 20 which are oppositely arranged, wherein the touch panel 10 further comprises a first driving chip IC1 and a noise judgment module 11, and the display panel 20 comprises a display driving self-adaptive module 21; the first driving chip IC1 is connected to the display panel 20 and the noise determination module 11, respectively, and when the display panel 20 displays, the first driving chip IC1 obtains a noise value and a first touch signal of the touch panel 10, and synchronously sends the first touch signal and the noise value to the noise determination module 11; the noise judgment module 11 is respectively connected with the first driving chip IC1 and the display driving adaptive module 21, the noise judgment module 11 receives the first touch signal and the noise value sent by the first driving chip IC1, judges that the noise value is greater than the noise value threshold, and outputs a driving signal to the display driving adaptive module 21; the display driving adaptive module 21 is connected to the noise determination module 11, and receives the driving signal sent by the noise determination module 11, and selects the display parameter to adjust the display panel 20 until the noise value of the touch panel 10 is smaller than the noise value threshold.
Referring to fig. 2 and 3, only the structures of the touch panel 10 and the display panel 20 are illustrated, but the connection structure of the touch panel 10 and the display panel 20 is not illustrated, and fig. 5 illustrates that the touch panel 10 and the display panel 20 can be connected by one main control board 30, but not limited to this, the connection may be only an electrical connection, other connections such as a mechanical connection, or a physical connection, as long as the transmission of signals can be ensured.
The touch panel 10 may be a capacitive touch panel, and includes a substrate (not shown), and touch driving electrodes TX and touch sensing electrodes RX disposed on the substrate and distributed transversely and longitudinally, and the touch detection principle of the capacitive touch panel is as follows: touch driving electrodes TX and touch sensing electrodes RX which are distributed crosswise are formed in the touch panel, a capacitance matrix is formed at the intersection, then a first driving chip IC1 applies touch detection signals to the touch driving electrodes TX respectively, and sequentially detects touch sensing signals output by the touch sensing electrodes corresponding to the touch driving electrodes RX, so as to detect capacitance changes in the capacitance matrix and judge a touch position. In the embodiment, only the capacitive touch display panel is taken as an example, but the working principle of the touch panel 10 is not limited thereto, and the touch panel may also be of a resistive type or an inductive type, which is not specifically limited in the embodiment. Meanwhile, the embodiment also only illustrates that the touch panel 10 is externally mounted on the display panel 20, but the invention is not limited thereto, and the touch driving electrodes TX and the touch sensing electrodes RX may be embedded in the display panel, and only the above functions are realized by separate driving control. Optionally, the substrate may be a glass substrate, and the touch driving electrode TX and the touch sensing electrode RX are disposed on a side of the substrate away from the display panel, which is only exemplified in the above structure, but not limited thereto, for example, the display panel 10 generally includes a glass cover plate, and the glass cover plate of the display panel may be reused as the substrate of the touch panel 20, that is, the touch driving electrode TX and the touch sensing electrode RX may be disposed on a glass rod plate, or may also be reused as glass of a color film substrate in the display panel 10, so that the first driving chip IC1 may also be directly connected to the glass of the color film substrate, which is beneficial to simplifying the structure of the display device.
It can be understood that, when the display panel 20 is driven, as the usage time is aged, the temperature is high or low, the process fluctuates, and the display image is different, the high frequency signal of the display panel will be coupled to the touch panel due to electromagnetic induction, which will cause electromagnetic interference to the touch panel 10 in real time, and the touch noise value of the touch panel 10 is increased, which is likely to cause the problem of touch misjudgment. Furthermore, in the display stage and before the touch stage, the first driver IC1 is respectively connected to the display panel 20 and the noise determination module 11, and the first driver IC1 obtains the noise value and the first touch signal of the touch panel 10 and synchronously sends the first touch signal and the noise value to the noise determination module 11; the noise determination module 11 is connected to the noise determination module 11 and the display driving adaptive module 21, respectively, receives the first touch signal and the noise value sent by the first driving chip IC1, determines that the noise value is greater than the noise threshold, outputs the driving signal to the display driving adaptive module 21, because the first driving chip IC1 has determined that the touch panel 10 has not occurred at this time, and if the noise value is greater than the noise threshold, it is possible to cause the touch signal received by the subsequent touch panel 10 to be the touch event caused by the influence of the noise value, but not the real touch event, and further needs to adjust the touch panel 10 or the display panel 20 to prevent touch misjudgment at this time, but the present invention sets the display driving adaptive module 21 on the display panel 20, sets the display driving adaptive module 21 to be connected to the noise determination module 11, and the display driving adaptive module 21 receives the driving signal sent by the noise determination module 11, selecting the display parameters to adjust the display panel 20, and repeating the above process until the noise value of the touch panel 10 is smaller than the noise value threshold, wherein the noise value smaller than the noise value threshold does not affect the touch determination, so as to prevent the touch determination from being misjudged.
Optionally, the first driver chip IC1 obtains the noise value and the first touch signal of the touch panel 10, and synchronously sends the first touch signal and the noise value to the noise determination module 11; the first driver IC1 determines whether the touch panel 10 is touched, and when the first driver IC determines that the touch panel 10 is not touched, obtains a first touch signal of the touch panel 10 and obtains a noise value of the touch panel 10, and then synchronously sends the first touch signal and the noise value to the noise determination module 11. The first driver IC1 sends a touch interrupt signal to the noise determination module 11 according to a capacitance change of the touch detection unit in the touch panel 10, where the touch interrupt signal includes a level signal with a high/low change, and the first driver IC1 determines whether a touch event occurs according to the touch interrupt signal.
Optionally, the first driver IC1 includes a determination touch pin and a noise value pin, where the determination touch pin is used to output a touch interrupt signal to the noise determination module 11, and the noise value pin is used to synchronously send a noise value of the touch panel 10.
Alternatively, the noise determination module 11 may be SOC TI Jacinto6 DRA72X, where SOC is a system-on-chip, also called system-on-chip, meaning that it is a product, an integrated circuit with a dedicated target, which contains the complete system and has all the contents of embedded software. And then, a noise value threshold may be preset in the noise determination module 11, and the first touch type and the noise value sent by the first driver chip IC are subsequently received, so as to determine whether the noise value is greater than the noise value threshold, because the noise value is less than the noise value threshold, the touch determination on the touch panel 10 is less affected and can be ignored, and when the noise value is greater than the noise value threshold, the problem of touch erroneous determination may be caused, and the display panel 20 needs to be subsequently adjusted to reduce the noise on the touch panel, so as to reduce the probability of touch erroneous determination.
In some optional embodiments, with reference to fig. 6, fig. 6 is a timing diagram of touch control of a display device provided by the present application. The display device 200 provided in the present embodiment: the noise determination module 11 receives the first touch signal and the noise value sent by the first driver IC1, determines that at least one noise value is greater than the noise threshold, and outputs a driving signal to the display driving adaptation module 21. Fig. 6 only illustrates the timing of the touch interrupt signal sent by the first driver chip IC1, wherein the touch interrupt signal includes a level signal with high and low changes, and the first touch signal P is represented by only a high level signal, but is not limited thereto, and may be represented by a low level signal in other cases. Fig. 6 only shows that the noise value and noise determination module 11 corresponding to the first touch signal, which is circled by a dashed line, performs the determination processing, that is, the noise value corresponding to the first touch signal is output to the display driving adaptive module 21, and the display parameters of the display panel 20 are adjusted.
It can be understood that, when the display panel 20 displays, the first driver IC1 obtains the noise value and the first touch signal of the touch panel 10, and sends the first touch signal and the noise value to the noise determination module 11 synchronously, and the noise determination module 11 receives the first touch signal and the noise value sent by the first driver IC1, determines that at least one noise value is greater than the noise value threshold, and outputs the driving signal to the display driving adaptive module 21. Further, when the noise determination module 11 receives the three first touch signals, it only determines the noise value corresponding to the second first touch signal, and then ends or sends the determined structure to the display driving adaptive module 21 to adjust the display parameters. On one hand, since the noise determination module 11 only determines the noise value corresponding to a portion of the first touch signal, the display panel 20 is adjusted at least once to reduce the influence on the touch panel 10 when the display panel 20 is driven, that is, compared with the prior art, the problem of touch erroneous determination is reduced to a certain extent. In another aspect, the noise determination module 11 does not need to determine the relative noise value of each first touch signal, and may reduce the frequency of the timing sequence determined by the noise determination module 11, and also reduce the operating frequency of the display driving adaptive module 21, thereby further facilitating the reduction of power consumption of the display device.
In some optional embodiments, with reference to fig. 7, fig. 7 is a timing diagram of touch control of another display device provided by the present application. The display device 200 provided in the present embodiment: the noise determination module 11 receives the first touch signal and the noise value sent by the first driver IC1, determines that each noise value is greater than the noise value threshold, and outputs a driving signal to the display driving adaptation module 21.
Fig. 7 illustrates only the timing of the touch interrupt signal sent by the first driver chip IC1, where the touch interrupt signal includes a level signal with high and low changes, and the first touch signal P is represented by only a high level signal, but is not limited thereto, and may be represented by a low level signal in other cases. And the noise value and noise determination module 11, which is only circled by the dashed line in fig. 7, corresponding to the first touch signal will perform the determination process, that is, the noise value corresponding to the first touch signal will output the driving signal to the display driving adaptive module 21, and adjust the display parameters of the display panel 20.
It can be understood that, when the display panel 20 displays, the first driving chip IC1 obtains the noise value and the first touch signal of the touch panel 10, and sends the first touch signal and the noise value to the noise determination module 11 synchronously, after the first driving chip IC1 obtains the first touch signal, each first touch signal and its corresponding noise value are sent to the noise determination module 11, the noise determination module 11 determines each noise value and then sends the driving signal to the display driving adaptive module 21, the display driving adaptive module 21 may sequentially select the display parameters, and then adjust each display panel that is greater than the noise value threshold, thereby avoiding the noise to the touch panel 10 when the display panel 20 is driven, and avoiding the problem of touch erroneous determination. Compared with the noise value corresponding to only part of the first touch signal determined by the noise determination module 11, the problem of touch erroneous determination can be avoided to a greater extent.
In some alternative embodiments, continuing with fig. 6 and 7, the present embodiment provides a display device 200: the first driver IC1 determines whether the touch panel 10 is in the touch stage T1 or the no-touch stage T2, and the touch stage T1 and the no-touch stage T2 are alternately arranged; the first touch signal is transmitted during the no-touch period T1, and the second touch signal is transmitted during the touch period T2.
It can be understood that the first driver IC1 determines whether the touch panel 10 is touched, i.e. determines whether the touch panel 10 is in the touch stage T1 or the no-touch stage T2, and when the first driver IC determines that the touch panel 10 is in the touch stage T1, i.e. no touch event occurs, obtains a first touch signal of the touch panel 10, and obtains a noise value of the touch panel 10, so as to synchronously send the first touch signal and the noise value to the noise determination module 11. In the touch phase T2, a second touch signal is sent, but the noise value is not sent synchronously, and the touch panel 10 forms a touch related operation according to the second touch signal, i.e., the touch signal.
In some alternative embodiments, continuing with fig. 6 and 7, the present embodiment provides a display device 200: the first touch signal is a high level signal, and the second touch signal is a low level signal; or, the first touch signal is a low-level signal, and the second touch signal is a high-level signal.
It is understood that the first touch signal and the second touch signal are a high level signal and a low level signal, respectively, and the first driver chip IC1 outputs whether a touch event occurs on the touch panel 10 by determining whether the signals are high level signals or low level signals. Fig. 6 and 7 only show that the first touch type is a high-level signal, and the second touch type is a low-level signal, but the present invention is not limited thereto, and the first touch type and the second touch type may be specifically set according to actual situations.
In some alternative embodiments, as shown in fig. 8, fig. 8 is a schematic structural diagram of another display device provided in the present application. The display device 200 provided in the present embodiment: the display drive adaptation module 21 includes: the parameter storage module 22 is connected with the noise judgment module 11 and the second driver chip IC2 respectively, preset a plurality of groups of display parameters, and after receiving the driving signal sent by the noise judgment module 11, select one group from the plurality of groups of display parameters and send the selected group to the second driver chip IC2 of the display panel 20; the second driving chip IC2 and the second driving chip IC2 are respectively connected to the parameter storage module 22 and the display panel 20, and are configured to receive the display parameters sent by the parameter storage module 22 and adjust the display panel 20 until the noise value of the touch panel 10 is smaller than the noise value threshold.
It can be understood that, after the display stage, during the touch stage, the first driving chip IC1 is respectively connected to the display panel 20 and the noise determination module 11, the first driving chip IC1 determines whether the touch panel 10 is touched, when the first driving chip IC determines that the touch panel 10 does not have a touch event, the first driving chip IC obtains the first touch signal of the touch panel 10, and simultaneously obtains the noise value of the touch panel 10, and then synchronously sends the first touch signal and the noise value to the noise determination module 11, the noise determination module 11 is respectively connected to the noise determination module 11 and the parameter storage module 22 of the display driving adaptive module 21, the noise determination module 11 receives the first touch signal and the noise value sent by the first driving chip IC, determines that the noise value is greater than the noise value threshold, and outputs the driving signal to the parameter storage module 22, because the first driving chip IC has determined that the touch panel 10 does not have a touch event, if the noise value is greater than the noise value threshold value, it may cause the subsequent touch signal received by the touch panel 10 to be a noise value influence, but not a real touch event, and further, at this time, it is necessary to adjust the touch panel 10 or the display panel 20 to prevent touch misjudgment, but according to the present invention, the display driving adaptive module 21 is arranged on the display panel 20, the display driving adaptive module 21 includes a parameter storage module 22 and a second driving chip IC2, the parameter storage module 22 is arranged, the parameter storage module 22 is respectively connected with the noise judgment module 11 and the second driving chip IC2, multiple sets of display parameters are preset, and after receiving the driving signal sent by the noise judgment module 11, one set of the display parameters is selected from the multiple sets of display parameters and sent to the second driving chip IC2 of the display panel 20; the second driving chip IC2 and the second driving chip IC2 are respectively connected to the parameter storage module 22 and the display panel 20, and are configured to receive the display parameters sent by the parameter storage module 22 and adjust the display panel 20 until the noise value of the touch panel 10 is smaller than the noise value threshold. The touch control misjudgment can be prevented because the noise value smaller than the noise value threshold value cannot influence the touch control judgment, namely the touch control misjudgment problem is reduced by adjusting the parameters of the display panel to reduce the noise influence of the display panel on the touch control panel.
In some alternative embodiments, as shown in fig. 9, fig. 9 is a schematic structural diagram of another display device provided in the present application. The display device 200 provided in the present embodiment: a set of display parameters is selected according to the set step length so that the noise value of the touch panel 10 is minimized.
It is understood that the parameter storage module 22 may be an EEPROM M24128 for storing all the display parameters, and for subsequently calling any one set of display parameters in the parameter storage module 22 to adjust the display panel 20 until the noise level of the touch panel 10 is less than the noise level threshold. Further, the noise determination module 11(SOC) in the touch panel 10 further includes three output terminals, which are EEPCSB, EEPSDA, and EEPSLC, respectively, and are connected to the parameter storage module 22, and the display parameters in the parameter storage module 22 are automatically selected according to the set step length by the EEPCSB, the EEPSDA, and the EEPSLC. Wherein, EEPCSB, EEPSDA, and EEPSLC are 3-line SPI, which ensures communication between the noise determination module 11(SOC) and the parameter storage module 22(EEPROM), EEPCSB is a chip select pin, EEPSCL is a clock pin, and EEPSDA is a data pin.
Optionally, the display parameters include a display frequency, a power boosting frequency, a driving capability, and a display time.
It is understood that, in conjunction with table 1 below, table 1 is a key factor of the display panel driving EMI. A set of display parameters is selected according to the set step length so that the noise value of the touch panel 10 is minimized.
As shown in the above table, it can be known that the noise value of the group of display parameters obtained at the 112 th time is the lowest 40, and the value of the consistent noise value threshold is generally set at 70, and obviously, the noise value 40 is much smaller than the noise value threshold, and then the noise value of the touch panel 10 can be minimized by selecting the group of display parameters at the 112 th time. The present invention is not limited thereto and the specific numerical value may be set according to the actual situation of the display device 200.
In some alternative embodiments, and as shown in continued reference to fig. 5, the present embodiment provides a display device 200: the noise value is the variation of the capacitance of the touch panel 10.
It can be understood that the noise value is a digital value obtained by electrically converting the variation of the capacitance of the touch panel 10. The noise threshold is generally set to be different values according to different display devices, and for one display device, the noise threshold is a fixed value, and a determination point for determining whether the noise can be ignored by the touch panel is provided.
In some alternative embodiments, referring to fig. 10, fig. 10 is a flowchart of a driving method of a display device provided in the present application. The driving method of the display device provided by the embodiment comprises the following steps:
step S1: acquiring a noise value and a first touch signal of a touch panel, and synchronously sending the first touch signal and the noise value;
step S2: receiving a first touch signal and a noise value, judging that the noise value is greater than a noise value threshold value, and outputting a driving signal;
step S3: receiving a driving signal, selecting a display parameter and adjusting a display panel;
step S4: and when the display panel displays, re-acquiring the noise value of the touch panel, and circulating the steps until the noise value of the touch panel is smaller than the noise value threshold.
It can be understood that after the display stage of the display device 200, when the display panel 20 is driven to display, the EMI interference to the touch panel 10 is enhanced in real time, and the touch noise value of the touch panel 10 is increased, which is likely to cause the problem of touch misjudgment. Furthermore, after the display stage and during the touch control stage, the method comprises the first step of acquiring a noise value and a first touch signal of the touch panel and synchronously sending the first touch signal and the noise value; secondly, receiving the first touch signal and the noise value, judging that the noise value is larger than a noise value threshold value, and outputting a driving signal; if the noise value is greater than the noise value threshold value, it may cause the subsequent touch signal received by the touch panel 10 to be a touch event that is not a real event due to the influence of the noise value, and then the touch panel 10 or the display panel 20 needs to be adjusted to prevent touch misjudgment, but the invention selects the display parameter to adjust the display panel by receiving the driving signal; and finally, when the display panel displays, re-acquiring the noise value of the touch panel, and circulating the steps until the noise value of the touch panel is smaller than the noise value threshold. The touch control misjudgment can be prevented because the noise value smaller than the noise value threshold value cannot influence the touch control judgment, namely the touch control misjudgment problem is reduced by adjusting the parameters of the display panel to reduce the noise influence of the display panel on the touch control panel.
In some alternative embodiments, as shown in fig. 10 and fig. 11, fig. 11 is a flowchart of a driving method of a display device provided in the present application. The driving method of the display device provided by the embodiment comprises the following steps:
in step S1, the display panel is in the normal display state, and the display parameters corresponding to the display panel are initialized. The touch panel judges whether the touch panel is in a non-touch stage, when the first driving chip judges that the touch panel does not generate a touch event, a first touch signal of the touch panel is obtained, meanwhile, a noise value of the touch panel is obtained, and then the first touch signal and the noise value are synchronously sent to the noise judging module.
In the step S4, when the display panel with the corresponding display parameters is displaying, re-acquiring the noise value of the touch panel, and determining whether the display panel is in a non-touch stage again, when the first driving chip determines that the touch panel has not generated a touch event, obtaining the first touch signal of the touch panel, and simultaneously acquiring the noise value of the touch panel, and further synchronously sending the first touch signal and the noise value to the noise determination module, where the noise value continues to determine whether the noise value is smaller than the threshold of the noise value, and if the noise value is larger than the threshold of the noise value, continuing to loop the above steps until the noise value of the touch panel is smaller than the threshold of the noise value.
As can be seen from the foregoing embodiments, the display device and the driving method thereof according to the present invention at least achieve the following advantages:
compared with the prior art, the invention provides a display device and a driving method thereof, wherein the display device comprises a touch panel and a display panel which are oppositely arranged, the touch panel also comprises a first driving chip and a noise judgment module, and the display panel comprises a display driving self-adaptive module; the first driving chip is respectively connected with the display panel and the noise judging module, and when the display panel displays, the first driving chip acquires a noise value and a first touch signal of the touch panel and synchronously sends the first touch signal and the noise value to the noise judging module; the noise judging module is respectively connected with the noise judging module and the display driving self-adaptive module, receives the first touch signal and the noise value sent by the noise judging module, judges that the noise value is greater than the noise value threshold value, and outputs a driving signal to the display driving self-adaptive module; the display driving self-adaptive module is connected with the noise judging module, receives the driving signal sent by the noise judging module, selects the display parameters and adjusts the display panel until the noise value of the touch panel is smaller than the noise value threshold. The invention provides a display device and a driving method thereof, wherein when a high-frequency signal generated when a display panel displays generates noise on a touch panel, whether the noise value is larger than a noise value threshold value or not is judged, and when the acquired noise value is larger than the noise value threshold value, the influence of the display panel on the noise value of the touch panel is reduced by adjusting a preset display parameter in the display panel until the noise value of the touch panel is smaller than the noise value threshold value, so that the problem of touch misjudgment can be reduced in a touch stage after the display stage.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A display device, comprising: the display panel comprises a display driving self-adaptive module and a first driving chip, wherein the display driving self-adaptive module is connected with the display driving self-adaptive module;
the first driving chip is respectively connected with the display panel and the noise judging module, and when the display panel displays, the first driving chip acquires a noise value and a first touch signal of the touch panel and synchronously sends the first touch signal and the noise value to the noise judging module;
the noise judging module is respectively connected with the first driving chip and the display driving self-adaptive module, receives the first touch signal and the noise value sent by the first driving chip, judges that the noise value is greater than a noise value threshold value, and outputs a driving signal to the display driving self-adaptive module;
the display driving self-adaptive module is connected with the noise judging module, receives the driving signal sent by the noise judging module, selects display parameters and adjusts the display panel until the noise value of the touch panel is smaller than the noise value threshold.
2. The display device according to claim 1, further comprising: the noise judging module receives the first touch signal and the noise value sent by the first driving chip, judges that at least one noise value is larger than a noise value threshold value, and outputs a driving signal to the display driving self-adaptive module.
3. The display device according to claim 1, wherein the noise determination module receives the first touch signal and the noise value sent by the first driver chip, determines that each of the noise values is greater than a noise value threshold, and outputs a driving signal to the display driving adaptation module.
4. The display device according to claim 1, wherein the display drive adaptation module comprises:
the parameter storage module is respectively connected with the noise judgment module and the second driving chip, presets a plurality of groups of display parameters, selects one group from the plurality of groups of display parameters after receiving the driving signal sent by the noise judgment module, and sends the selected group to the second driving chip of the display panel;
and the second driving chip is respectively connected with the parameter storage module and the display panel and is used for receiving the display parameters sent by the parameter storage module and adjusting the display panel until the noise value of the touch panel is smaller than the noise value threshold.
5. The display device according to claim 4, wherein a set of the display parameters is selected according to a set step size such that the noise value of the touch panel is minimized.
6. The display device according to claim 1, wherein the first driver chip determines whether the touch panel is in a touch stage or in a no-touch stage, and the touch stage and the no-touch stage are alternately arranged;
and sending the first touch signal in the non-touch stage, and sending a second touch signal in the touch stage.
7. The display device according to claim 6, wherein the first touch signal is a high-level signal and the second touch signal is a low-level signal;
or, the first touch signal is a low level signal, and the second touch signal is a high level signal.
8. The display device according to claim 1, wherein the noise value is a variation of a capacitance value of the touch panel.
9. The display device according to claim 1, wherein the display parameters include a display frequency, a power supply boosting frequency, a driving capability, and a display time.
10. A method of driving a display device, comprising the steps of:
acquiring a noise value and a first touch signal of the touch panel, and synchronously sending the first touch signal and the noise value;
receiving the first touch signal and the noise value, judging that the noise value is greater than a noise value threshold value, and outputting a driving signal;
receiving the driving signal, selecting display parameters and adjusting the display panel;
and when the display panel displays, re-acquiring the noise value of the touch panel, and circulating the steps until the noise value of the touch panel is smaller than the noise value threshold.
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