CN111221428A - Driving device and driving method for driving touch display panel - Google Patents
Driving device and driving method for driving touch display panel Download PDFInfo
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
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Abstract
The invention provides a driving device and a driving method for controlling a touch display panel. When the scan lines of the first scan line group receive the scan signals, the driving device provides the source data to the touch display panel when the driving device writes the data of the scan signals received by at least one scan line of the first scan line group into the time sequence. When the scanning lines of the second scanning line group receive the scanning signals, the driving device compensates the source data to generate compensated source data, the compensated source data is provided to the source data driver, and the compensated source data is provided to the touch display panel at the data writing time sequence of the scanning signals received by at least one scanning line of the second scanning line group, so that the horizontal stripe display effect of the touch display panel is reduced.
Description
Technical Field
The present invention relates to a driving apparatus and a driving method for driving a display panel, and more particularly, to a driving apparatus and a driving method for driving a touch display panel.
Background
In the conventional driving display panel, a plurality of common electrodes are divided into a plurality of touch units. During display, the common electrode serves as a common electrode to supply a common voltage signal. During touch sensing, the common electrode is used as a touch electrode to provide a touch signal, so that the effect of integrating touch and display is achieved. In general, the common electrodes are designed in a square shape and arranged in a rectangular array. With the specifications for improving the display quality of the display screen, the horizontal stripe display effect generated by the arrangement of the common electrode and the plurality of scanning lines is not negligible.
Disclosure of Invention
The invention provides a driving device and a driving method thereof, which are used for reducing the horizontal stripe display effect of a touch display panel.
According to an embodiment of the present invention, the driving apparatus of the present invention is used for controlling a touch display panel. The touch display panel comprises at least one common electrode, and each common electrode corresponds to a first scanning line group and a second scanning line group for receiving scanning signals. The driving device comprises a source data driver and a source data compensation module. The source data driver is used for receiving a plurality of source data or a plurality of compensated source data. When at least one scanning line of the first scanning line group receives a scanning signal, the source data driver provides the plurality of source data to the touch display panel at a data writing time sequence of the scanning signal received by the at least one scanning line of the first scanning line group. When at least one scanning line of the second scanning line group receives the scanning signal, the source data driver provides the plurality of compensated source data to the touch display panel at the data writing timing of the scanning signal received by the at least one scanning line of the second scanning line group. The source data compensation module is coupled to the source data driver. The source data compensation module is used for compensating the plurality of source data to generate a plurality of compensated source data when at least one scanning line of the second scanning line group receives a scanning signal, and providing the plurality of compensated source data to the source data driver.
According to an embodiment of the present invention, each of the at least one common electrode corresponds to a 1 st scan line to an nth scan line, where the 1 st scan line to a k-1 th scan line are a first scan line group, and the k th scan line to the nth scan line are a second scan line group, where k and n are positive integers, respectively, and 1< k < n.
According to an embodiment of the present invention, the number of at least one scan line of the second scan line group is equal to the number of the plurality of timings in the scan signal minus 1.
According to an embodiment of the invention, the source data compensation module comprises a source data adjustment unit and a scanning judgment unit. The source data adjusting unit is used for adjusting the plurality of source data according to an adjusting value so as to generate the plurality of compensated source data, and providing the plurality of compensated source data to the source data driver. The scanning judgment unit is coupled to the source data adjustment unit. The scanning judging unit is used for judging whether the second scanning line group receives the scanning signal or not, and when the second scanning line group receives the scanning signal, the scanning judging unit instructs the source electrode data adjusting unit to generate the plurality of compensated source electrode data.
According to an embodiment of the present invention, the source data compensation module includes an adjustment value calculation unit. The adjustment value calculating unit is used for calculating an adjustment value according to the coupling influence of the first scanning line group on the at least one common electrode and the coupling influence of the second scanning line group on the at least one common electrode.
According to an embodiment of the present invention, the source data adjusting unit further receives an adjustment value from the outside via the transmission interface.
According to an embodiment of the present invention, the driving method of the present invention is used for controlling a touch display panel. The touch display panel comprises at least one common electrode, each common electrode corresponds to a first scanning line group and a second scanning line group for receiving scanning signals, and the driving device method comprises the following steps: when at least one scanning line of the first scanning line group receives a scanning signal, providing the source data to the touch display panel at the data writing time sequence of the scanning signal received by the at least one scanning line of the first scanning line group; and when at least one scanning line of the second scanning line group receives a scanning signal, compensating the source data to generate compensated source data, and providing the compensated source data to the touch display panel at the data writing time sequence of the scanning signal received by the at least one scanning line of the second scanning line group.
In view of the above, when the scanning signal is received by at least one scanning line of the first scanning line group, the source data is provided to the touch display panel at the data writing timing of the scanning signal. And providing the compensated source data to the source data driver at a data writing timing of the scan signal when at least one scan line of the second scan line group receives the scan signal. Therefore, the invention can reduce the horizontal stripe display effect of the touch display panel by compensating the source electrode data.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic diagram illustrating a scan line operation mechanism of a touch display panel in the prior art;
FIG. 2 is a schematic diagram of a touch display according to an embodiment of the invention;
FIG. 3 is a schematic view of a driving device according to another embodiment of the present invention;
FIG. 4 is a schematic view of a driving apparatus according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a driving method according to an embodiment of the invention.
Description of the reference numerals
10: a touch display;
110: a touch display panel;
120. 220, 320: a drive device;
122. 222, 322: a source data driver;
124. 224, 324: a source data compensation module;
2242. 3242: a source data adjusting unit;
2244. 3244: a scanning judgment unit;
2246: an adjustment value calculation unit;
COM, COM1, COM 2: a common electrode;
CMD1, CMD 2: an indication signal;
g01, G35 to G46, G80, G (1) to G (n): scanning a line;
T1-T7: time sequence;
S1-SM: a source line;
s510, S520: a step of;
VGs 35 to VG46, VG (1) to VG (n): scanning a signal;
VS 1-VSM: source data;
VS1 'VSM', VS1 'VSM': compensated source data;
Δ VCOM1, Δ VCOM 2: and adjusting the value.
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an operation mechanism of a scan line of a touch display panel in the prior art. The touch display panel at least comprises common electrodes COM1 and COM 2. The common electrode COM1 corresponds to the scan lines G01 to G40 of the touch display panel. The common electrode COM2 corresponds to the scan lines G41 to G80 of the touch display panel. The scanning lines G01 to G80 are sequentially charged by scanning signals. The scanning lines G01 to G80 are charged by a plurality of scanning signals in a plurality of timings (for example, 6 timings). Taking the scan line G35 as an example, the scan line G35 is charged with the scan signal VG35 at 6 timings. After the scan line G35 is precharged at the timing T1-T5 of the 6 timings, the source data corresponding to the scan line G35 is written at the last timing T6 of the 6 timings. The last timing T6 of the scan signal VG35 on the scan line G35 is referred to as a data write timing. Taking the scan line G36 as an example, the scan line G36 is charged with the scan signal VG36 at 6 timings. The scan line G36 is precharged at the timings T2 to T6 of the 6 timings, and the source data corresponding to the scan line G36 is written at the last timing T7 of the 6 timings, and the last timing T7 of the scan signal VG36 on the scan line G36 is referred to as a data write timing. In this way, as shown in fig. 1, the scan lines G37-G46 are charged by the scan signals VG 37-VG 46 for 6 timings respectively, and the scan lines G37-G46 are precharged at the first 5 timings of the 6 timings, and then the source data corresponding to the scan lines G37-G46 are written at the last timing of the 6 timings.
Due to such a charging mechanism, the voltages on the common electrodes COM1 and COM2 are coupled by the scan lines with high level. This causes the common electrode COM1 to have the same coupling effect (coupling via 6 timings) at the position corresponding to the scan lines G01-G35, while the coupling effect starts to decrease (coupling via 5 timings) at the position corresponding to the scan line G36 of the common electrode COM1, and the coupling effect starts to decrease (coupling via 4 timings) at the position corresponding to the scan line G37 of the common electrode COM 1. Therefore, the coupling effect at the position of the common electrode COM1 corresponding to the scan lines G36-G40 is gradually decreased. That is, the closer the edge position of the common electrode COM1 the coupling influence is, the smaller the number of high-level gate lines decreases (from the scan line G36 to the scan line G40). Next, the common electrode COM2 has the same coupling effect (coupling through 6 timings) at a position corresponding to the scan line G41. In this way, the edge of the common electrode COM1 close to the common electrode COM2 is more different from the other positions of the common electrode COM1 in brightness due to the coupling, so that the fringe feeling is generated at the interface of the touch sensing electrodes on the display.
Referring to fig. 2, fig. 2 is a schematic view of a touch display according to an embodiment of the invention. In the present embodiment, the touch display 10 includes a touch display panel 110 and a driving device 120. The touch display panel 110 at least includes (but is not limited to) a common electrode COM corresponding to a first scan line group GP1 and a second scan line group GP2 for receiving scan signals. In the present embodiment, the first scanning line group GP1 includes scanning lines G (1) to G (k-1). The second scanning line group GP2 includes scanning lines G (k) to G (n). For example, the scan line G (1) is used for receiving the scan signal VG (1) to charge the scan signal VG (1). As another example, the scan line G (k-1) is used for receiving the scan signal VG (k-1) to charge the scan signal VG (k-1). The scanning lines G (1) to G (n) are set to receive the scanning signals VG (1) to VG (n) in time series. For convenience of explaining the implementation of the present invention, the present embodiment only illustrates the common electrode COM corresponding to the first scan line group (e.g., GP1) and the second scan line group (e.g., GP 2). However, the number of the common electrodes may be one or more, and the number of the scanning line groups may be one or more. The number of common electrodes and the number of scanning line groups are not limited in the present invention.
In the present embodiment, the driving device 120 is coupled to the touch display panel 110 via the source lines S1-SM. The driving device 120 is used for controlling the touch display panel 110. The driving apparatus 120 includes a source data driver 122 and a source data compensation module 124. The source data driver 122 is used for receiving the source data VS 1-VSM or the compensated source data VS1 '-VSM'.
In the present embodiment, each of the scan signals VG (1) to VG (n) has a plurality of timings. For example, taking fig. 1 as an example, the scan signals VG (1) to VG (n) each have 6 timings. The last timing of the 6 timings is a data write timing. And the remaining timing is the precharge timing. When at least one of the scan lines G (1) to G (k-1) of the first scan line group GP1 receives a scan signal (at least one of the scan signals VG (1) to VG (k-1)), the source data driver 122 provides the source data VS1 to VSM to the touch display panel 110 at a data write timing of the received scan signal. Wherein k and n are each positive integers, and 1< k < n. For example, the source data driver 122 provides the source data VS1 to the touch display panel 110 via the source line S1 at the data writing timing.
When at least one of the scan lines G (k) -G (n) of the second scan line group GP2 receives a scan signal (at least one of the scan signals VG (k) -VG (n)), the source data driver 122 provides the compensated source data VS1 '-VSM' to the touch display panel 110 at the data writing timing of the received scan signal. When the scanning lines G (k) to G (n) of the second scanning line group GP2 receive the scanning signal, this means that the region on the common electrode COM where the different coupling influence occurs starts to be driven. Accordingly, the source data driver 122 provides the compensated source data VS1 'to VSM' to the touch display panel 110 at the data writing timing of the received scan signals VG (k) to VG (n). For example, the source data driver 122 provides the compensated source data VS 1' to the touch display panel 110 via the source line S1 at the data writing timing.
In this embodiment, the number of the scanning lines G (k) -G (n) of the second scanning line group GP2 is equal to the number of the plurality of timings in the scanning signal minus 1. For example, the scan signals VG (1) to VG (n) each have 6 timings, and thus the number of the scan lines G (k) to G (n) of the second scan line group GP2 may be 5.
In some embodiments, the touch Display panel 110 and the driving device 120 may be integrated in a Touch Display Driver Integration (TDDI).
For further details of the implementation of the driving device, please refer to fig. 3, in which fig. 3 is a schematic diagram of the driving device according to another embodiment of the present invention. The driving device 220 shown in fig. 3 can be used to control the touch display panel 110 shown in fig. 2. In the present embodiment, the driving apparatus 220 includes a source data driver 222 and a source data compensation module 224. The source data compensation module 224 includes a source data adjusting unit 2242 and a scan determining unit 2244. The source data adjusting unit 2242 is used for receiving the source data VS 1-VSM and an adjusting value Δ VCOM 1. The source data adjusting unit 2242 adjusts the source data VS1 VSM according to the adjustment value Δ VCOM1, thereby generating the compensated source data VS1 'VSM'.
The scan determining unit 2244 is coupled to the source data adjusting unit 2242. The scan determining unit 2244 is used for determining whether the second scan line group receives the scan signal, and indicates whether the source data adjusting unit 2242 generates the compensated source data VS1 '-VSM' according to the determination result of whether the second scan line group receives the scan signal.
To be more specific, if the scan determining unit 2244 determines that the first scan line group receives the scan signal and the second scan line group does not receive the scan signal, the driving device 220 provides the source data VS 1-VSM to the touch display panel at the data writing timing of the scan signal received by the first scan line group.
On the other hand, if the scan determining unit 2244 determines that the second scan line group receives the scan signal, the scan determining unit 2244 provides the indication signal CMD1 to instruct the source data adjusting unit 2242 to adjust the source data VS1 VSM according to the adjustment value Δ VCOM1 to generate the compensated source data VS1 'VSM', and instruct the source data adjusting unit 2242 to provide the compensated source data VS1 'VSM' to the source data driver 222. Specifically, after determining that the second scanning line group receives the scanning signal, the scan determining unit 2244 instructs the source data adjusting unit 2242 at least one of a plurality of timings (6 timings shown in fig. 1) of the received scanning signal, so that the source data adjusting unit 2242 adjusts the source data VS 1-VSM according to the adjustment value Δ VCOM1 to generate the compensated source data VS1 '-VSM'. In a preferred embodiment, after determining that the scan signal is received by the second scan line group, the scan determining unit 2244 instructs the source data adjusting unit 2242 at a first timing (i.e., the earliest timing) of the timings of the received scan signals, so that the source data adjusting unit 2242 adjusts the source data VS1 VSM to generate the compensated source data VS1 'to VSM' according to the adjustment value Δ VCOM 1. In addition, if the scan determining unit 2244 determines that the second scan line group receives the scan signal, the scan determining unit 2244 may further provide an indication signal CMD2 to instruct the source data driver 222 to stop receiving the source data VS1 VSM.
In the present embodiment, the adjustment value Δ VCOM1 is a difference value reflecting the coupling effect of the common electrode corresponding to the first scanning line group and the coupling effect of the common electrode corresponding to the second scanning line group. In this embodiment, the source data compensation module 224 further includes an adjustment value calculating unit 2246. The adjustment value calculating unit 2246 is used for calculating the adjustment value Δ VCOM1 according to the coupling effect of the first scan line group on the common electrode and the coupling effect of the second scan line group on at least one common electrode. Therefore, the source data adjusting unit 2242 compensates the source data VS1 to VSM by using the adjustment value Δ VCOM1 calculated by the adjustment value calculating unit 2246 to generate the compensated source data VS1 'to VSM'. For example, the source data adjusting unit 2242 may add the source data VS1 and the adjusted value Δ VCOM1, i.e., superimpose the voltage levels of the source data VS1, thereby obtaining the compensated source data VS1 ═ VS1+ Δ VCOM 1. For another example, the source data adjusting unit 2242 may add the source data VS2 and the adjustment value Δ VCOM1 to obtain the compensated source data VS2 ═ VS2+ Δ VCOM1, and so on. In this way, the driving device 220 compensates the difference in the coupling effect of the common electrode corresponding to the second scanning line group by compensating the source data VS1 '-VSM', so as to correct the display result of the touch display panel corresponding to the second scanning line group, thereby reducing the horizontal stripe display effect of the touch display panel. The adjustment value Δ VCOM1 of the present embodiment may be a value greater than 0 or a value less than 0 based on the design requirement of the touch display panel.
In some embodiments, the adjustment value Δ VCOM1 may be a value obtained through quality testing or experimentation during product manufacturing. The driving apparatus 220 may further include a memory module (not shown) for storing the adjustment value Δ VCOM 1. Therefore, the source data adjusting unit 2242 is instructed to adjust the source data VS1 VSM, the adjustment value Δ VCOM1 is obtained from the memory module, and the source data VS1 VSM is adjusted according to the adjustment value Δ VCOM1 to generate the compensated source data VS1 'VSM'.
In the present embodiment, the implementation details of the source data driver 222 can be adequately taught in the embodiment of fig. 2, and therefore are not repeated here.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a driving apparatus according to another embodiment of the invention. The driving device 320 of fig. 4 can be used to control the touch display panel 110 shown in fig. 2. In the present embodiment, the driving device 320 includes a source data driver 322 and a source data compensation module 324. The source data compensation module 324 includes a source data adjusting unit 3242 and a scan determining unit 3244. Unlike the embodiment of fig. 3, the source data adjusting unit 3242 can receive an instruction or a program code issued from the outside via the transmission interface and generate the adjustment value Δ VCOM2 based on the instruction or the program code. Therefore, the source data adjusting unit 3242 can adjust the source data VS1 VSM to generate the compensated source data VS1 "-VSM" according to the externally adjusted value Δ VCOM2 when the generation of the compensated source data VS1 "-VSM" is instructed. The transmission Interface of the present embodiment is, for example, a connection Interface capable of supporting Universal Serial Bus (USB), ethernet, Universal Asynchronous Receiver/Transmitter (UART), and Serial Peripheral Interface (SPI). The details of the source data driver 322 and the scan judging unit 3244 of the present embodiment can be sufficiently taught in the embodiments of fig. 2 and fig. 3, and therefore, are not repeated here.
Referring to fig. 2 and fig. 5, fig. 5 is a flowchart illustrating a driving method according to an embodiment of the invention. In step S510, when at least one scan line (at least one of the scan lines G (1) -G (k-1)) of the first scan line group GP1 receives a scan signal, a plurality of source data VS 1-VSM are provided to the touch display panel 110 at a data writing timing of the scan signal. In step S520, when at least one scan line (at least one of the scan lines G (k) -G (n)) of the second scan line group GP2 receives a scan signal, the source data VS 1-VSM are compensated to generate compensated source data VS1 '-VSM', and the compensated source data VS1 '-VSM' are provided to the touch display panel 110 at a data writing timing of the scan signal. The implementation details of steps S510 and S520 of the driving method can be sufficiently suggested in the embodiments of fig. 2 to 4, and therefore are not repeated here.
In summary, the present invention provides the source data to the touch display panel when at least one scan line of the first scan line group receives the scan signal. And providing the compensated source data to the touch display panel when at least one scanning line of the second scanning line group receives the scanning signal. In this way, the driving device can compensate the difference in the coupling effect of the common electrode corresponding to the second scanning line group by compensating the source data, so as to correct the display result of the touch display panel corresponding to the second scanning line group, thereby reducing the horizontal stripe display effect of the touch display panel.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A driving apparatus for controlling a touch display panel, wherein the touch display panel includes at least one common electrode, and each of the at least one common electrode corresponds to a first scan line group and a second scan line group for receiving a scan signal, the driving apparatus comprising:
a source data driver for receiving a plurality of source data or a plurality of compensated source data, providing the plurality of source data to the touch display panel at a plurality of time series data write timings of the scan signal received by at least one scan line of the first scan line group when the at least one scan line of the first scan line group receives the scan signal, and providing the plurality of compensated source data to the touch display panel at a plurality of time series data write timings of the scan signal received by at least one scan line of the second scan line group when the at least one scan line of the second scan line group receives the scan signal; and
the source data compensation module is coupled to the source data driver and configured to compensate the plurality of source data to generate a plurality of compensated source data when at least one scan line of the second scan line group receives the scan signal, and provide the plurality of compensated source data to the source data driver.
2. The driving apparatus as claimed in claim 1, wherein each of the at least one common electrode corresponds to a 1 st scan line to an nth scan line, wherein the 1 st scan line to a k-1 th scan line are the first scan line group, and the k scan line to the nth scan line are the second scan line group,
wherein k and n are each positive integers, and 1< k < n.
3. The driving apparatus as claimed in claim 1, wherein the number of at least one scan line of the second scan line group is equal to the number of timings in the scan signal minus 1.
4. The driving apparatus as claimed in claim 1, wherein the source data compensation module comprises:
a source data adjusting unit for adjusting the plurality of source data according to an adjustment value to generate the plurality of compensated source data and providing the plurality of compensated source data to the source data driver; and
and a scanning judgment unit, coupled to the source data adjustment unit, for judging whether the second scanning line group receives the plurality of scanning signals, and when the second scanning line group receives the plurality of scanning signals, instructing the source data adjustment unit to generate the plurality of compensated source data.
5. The driving apparatus as claimed in claim 4, wherein the source data compensation module further comprises:
and the adjusting value calculating unit is used for calculating the adjusting value according to the coupling influence of the first scanning line group on the at least one common electrode and the coupling influence of the second scanning line group on the at least one common electrode.
6. The driving apparatus as claimed in claim 4, wherein the source data adjusting unit further receives the adjustment value from the outside via a transmission interface.
7. A driving method for controlling a touch display panel, wherein the touch display panel includes at least one common electrode, and each of the at least one common electrode corresponds to a first scan line group and a second scan line group for receiving a scan signal, the driving method comprising:
when at least one scanning line of the first scanning line group receives the scanning signal, providing a plurality of source data to the touch display panel at a plurality of time sequence data writing time sequences in the scanning signal received by the at least one scanning line of the first scanning line group; and
when at least one scanning line of the second scanning line group receives the scanning signal, the plurality of source data are compensated to generate a plurality of compensated source data, and the plurality of compensated source data are provided to the touch display panel at a plurality of time sequence data writing time sequences of the scanning signal received by the at least one scanning line of the second scanning line group.
8. The driving method according to claim 7, wherein each of the at least one common electrode corresponds to the 1 st scan line to the n-th scan line, and wherein the driving method further comprises:
taking the 1 st scanning line to the (k-1) th scanning line as the first scanning line group; and
the k-th scanning line to the n-th scanning line are regarded as the second scanning line group,
wherein k and n are each positive integers, and 1< k < n.
9. The driving method as claimed in claim 7, wherein the number of at least one scan line of the second scan line group is equal to the number of timings in the scan signal minus 1.
10. The driving method according to claim 7, wherein when at least one scan line of the first scan line group receives the scan signal, the step of providing the source data to the touch display panel at a plurality of time series of data write timings in the scan signal received by the at least one scan line of the first scan line group comprises:
judging whether the second scanning line group receives the plurality of scanning signals;
when the second scanning line group is judged to receive the scanning signals, the source data are adjusted according to an adjustment value, and therefore the compensated source data are generated.
11. The driving method according to claim 10, further comprising:
and calculating the adjusting value according to the coupling influence of the first scanning line group on the at least one common electrode and the coupling influence of the second scanning line group on the at least one common electrode.
12. The driving method according to claim 10, further comprising:
receiving the adjustment value from the outside via a transmission interface.
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Application publication date: 20200602 |