CN110047422B - Display panel, display device and driving method of display panel - Google Patents
Display panel, display device and driving method of display panel Download PDFInfo
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- CN110047422B CN110047422B CN201910472966.8A CN201910472966A CN110047422B CN 110047422 B CN110047422 B CN 110047422B CN 201910472966 A CN201910472966 A CN 201910472966A CN 110047422 B CN110047422 B CN 110047422B
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The embodiment of the invention discloses a display panel, a display device and a driving method of the display panel. The display panel includes: a display area and a non-display area; the non-display area comprises a hole digging area, and the projection of the common electrode layer on the display panel is positioned in the display area; the common electrode layer comprises a plurality of first common electrode blocks and second common electrode blocks; the second common electrode block is arranged between the hole digging area and the first common electrode block, or the second common electrode block is arranged between the hole digging area and the edge of the display panel; the first electrode signal line is electrically connected with the first common electrode block; the second electrode signal line is electrically connected with the second common electrode block; the voltage of the driving signal on the first electrode signal line is the same as that of the driving signal on the second electrode signal line, and the current is different. Compared with the prior art, the embodiment of the invention improves the visible phenomenon of the common electrode block and improves the display uniformity of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and a driving method of the display panel.
Background
In order to realize better human-computer interaction, various intelligent terminals such as mobile phones, tablet computers, intelligent wearable devices and information inquiry machines in halls of public places are all provided with display panels, the display panels are widely applied, and the requirements of consumers on display devices are higher and higher.
In the prior art, in order to pursue a high screen ratio, a hole digging area is required to be arranged in a display area of a display panel, and a camera, an inductor, a receiver and other devices are required to be arranged in the hole digging area. However, the display panel has a problem of poor uniformity of display due to the arrangement of the hole digging region.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a driving method of the display panel, which are used for improving the display uniformity of the display panel and improving the display effect.
In a first aspect, an embodiment of the present invention provides a display panel, including: the display device comprises a display area and a non-display area, wherein the non-display area comprises a hole digging area;
the display panel further comprises a common electrode layer; the projection of the common electrode layer on the display panel is positioned in the display area; the common electrode layer comprises a plurality of first common electrode blocks and second common electrode blocks; the second common electrode block is arranged between the hole digging area and the first common electrode block, or the second common electrode block is arranged between the hole digging area and the edge of the display panel;
a first electrode signal line electrically connected to the first common electrode block;
a second electrode signal line electrically connected to the second common electrode block;
the voltage of the driving signal on the first electrode signal line is the same as that of the driving signal on the second electrode signal line, and the current is different.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes: a driving chip and a display panel according to any of the embodiments of the present invention;
the driving chip is electrically connected with the first electrode signal wire and the second electrode signal wire respectively.
In a third aspect, an embodiment of the present invention further provides a driving method of a display panel, where the driving method of the display panel includes: in a display stage, transmitting a first driving signal to the first electrode signal line and transmitting a second driving signal to the second electrode signal line; the first driving signal and the second driving signal have the same voltage and different current.
According to the embodiment of the invention, the first electrode signal line and the second electrode signal line are arranged, the voltage of the driving signals on the first electrode signal line and the second electrode signal line is the same, and the current is different, so that the first electrode signal line and the second electrode signal line respectively transmit the driving signals with different thrusts to the first common electrode block and the second common electrode block. The voltage of the driving signals on the first electrode signal line and the second electrode signal line are the same, and the voltages on the first common electrode block and the second common electrode block can be ensured to finally reach the same common voltage value. Compared with the prior art, the embodiment of the invention realizes the adjustment of the thrust of the driving signal aiming at different common electrode blocks, and reduces the difference of the time required by different common electrode blocks to reach the same common voltage value, thereby enhancing the consistency of the common voltage, improving the visible phenomenon of the common electrode blocks and improving the display uniformity of the display panel. Particularly, when a heavy load picture is displayed, the improvement effect of the embodiment of the invention on the uniformity of the display is more obvious.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the area 301 in FIG. 1;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a simplified block diagram of region 401 of FIG. 3;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram showing a simulation of a conventional common electrode block affected by voltage coupling of data lines;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a driving method of a display panel according to an embodiment of the invention;
fig. 9 is a flowchart illustrating another driving method of a display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the conventional display panel has a problem of poor display uniformity. The inventors have found, through their studies, that the reason for this problem is as follows.
The display panel comprises a hole digging area, notch or a special-shaped edge and the like. The display panel further comprises a common electrode layer and a plurality of electrode signal lines, the common electrode layer comprises a plurality of common electrode blocks, and the plurality of common electrode blocks are correspondingly connected with the plurality of electrode signal lines. The common electrode layer provides a common voltage for each pixel unit of the display panel.
However, due to the arrangement of the digging hole region, notch or the irregular edge, the shape of the adjacent common electrode block is changed, which is different from the shape of the normal common electrode block, so that the area of each common electrode block on the display panel is different. For example, the common electrode block (hereinafter, referred to as an irregular common electrode block) located around the excavated area has a small area, and the common electrode blocks (hereinafter, referred to as normal common electrode blocks) located at other positions have a large area. During the display of the display panel, the common electrode block couples the data signal on the data line to deviate the voltage thereof from a normal common voltage value (for example, the common voltage value is 0V). The area of the special-shaped common electrode block is small, so that the coupling is small, and the value of the voltage value deviating from the normal common voltage value is small; correspondingly, the coupling suffered by the normal common electrode block is larger due to the larger area of the normal common electrode block, and the value of the voltage value deviating from the normal common voltage value is larger. And the same driving signal is sent to the special-shaped common electrode block and the normal common electrode block, and the special-shaped common electrode block reaches a normal common voltage value before the normal common electrode block. Therefore, the common voltage of the conventional display panel is inconsistent, so that the common electrode block is visible, and the display uniformity of the display panel is poor. Especially when a heavy load picture is displayed, the brightness difference between the special-shaped common electrode block and the normal common electrode block is more obvious.
In view of this, an embodiment of the present invention provides a display panel. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is an enlarged structural diagram of a region 301 in fig. 1. Referring to fig. 1 and 2, the display panel includes: a display region and a non-display region, the non-display region includes a hole digging region 311, and exemplarily, the regions other than the hole digging region 110 shown in fig. 1 and 2 are both display regions. The display panel further includes a common electrode layer, a first electrode signal line 331 and a second electrode signal line 332, and a projection of the common electrode layer on the display panel is located in the display area. The common electrode layer includes a plurality of first and second common electrode blocks 321 and 322. The second common electrode block 322 is disposed between the dug hole region 311 and the first common electrode block 321, or the second common electrode block 322 is disposed between the dug hole region 311 and the edge 302 of the display panel. The first electrode signal line 331 is electrically connected to the first common electrode block 321, and the second electrode signal line 332 is electrically connected to the second common electrode block 322. The voltages of the driving signals on the first electrode signal line 331 and the second electrode signal line 332 are the same, and the currents are different.
Illustratively, the driving method of the display panel is to transmit a first driving signal to the first electrode signal line 331 and a second driving signal to the second electrode signal line 332 in a display stage; the first driving signal and the second driving signal have the same voltage and different current.
The voltage of the driving signal on the first electrode signal line 331 and the voltage of the driving signal on the second electrode signal line 332 are the same, and the current is different, that is, the driving signals with different thrusts are provided to the first common electrode block 321 and the second common electrode block 322. For example, a driving signal with smaller thrust can be provided for a common electrode block with smaller coupling, and a driving signal with larger thrust can be provided for a common electrode block with larger coupling, so that different common electrode blocks can be pulled back to a normal common voltage value at a faster speed. Specifically, the area of the first common electrode block 321 is larger than that of the second common electrode block 322, and the coupling of the second common electrode block 322 is smaller; the voltages on the first electrode signal line 331 and the second electrode signal line 332 are the same, and the current on the second electrode signal line 332 is smaller than the current on the first electrode signal line 331.
In the embodiment of the invention, the first electrode signal line 331 and the second electrode signal line 332 are arranged, and the voltages of the driving signals on the first electrode signal line 331 and the second electrode signal line 332 are the same, and the currents are different, so that the first electrode signal line 331 and the second electrode signal line 332 respectively transmit the driving signals with different thrusts to the first common electrode block 321 and the second common electrode block 322. The voltages of the driving signals on the first electrode signal line 331 and the second electrode signal line 332 are the same, so that the voltages on the first common electrode block 321 and the second common electrode block 322 can be ensured to finally reach the same common voltage value. Compared with the prior art, the embodiment of the invention realizes the adjustment of the thrust of the driving signal aiming at different common electrode blocks, and reduces the difference of the time required by different common electrode blocks to reach the same common voltage value, thereby enhancing the consistency of the common voltage, improving the visible phenomenon of the common electrode blocks and improving the display uniformity of the display panel. Particularly, when a heavy load picture is displayed, the improvement effect of the embodiment of the invention on the uniformity of the display is more obvious.
It should be noted that, in practical applications, only the driving signal on the first electrode signal line 331 or only the driving signal on the first electrode signal line 332 may be adjusted, that is, partial adjustability may be achieved. Specifically, the voltage and current of the driving signal on the first electrode signal line 331 may be kept constant, the voltage of the driving signal on the second electrode signal line 332 may be kept constant, and only the current of the driving signal on the second electrode signal line 332 may be adjusted to select an appropriate current value of the second electrode signal line 332; alternatively, the voltage and current of the driving signal on the second electrode signal line 332 may be kept constant, the voltage of the driving signal on the first electrode signal line 331 may be kept constant, and only the current of the driving signal on the first electrode signal line 331 may be adjusted to select an appropriate current value of the first electrode signal line 331.
With continued reference to fig. 1 and fig. 2, on the basis of the foregoing embodiments, optionally, the common electrode layer is reused as a touch electrode layer, and both the first electrode signal line 331 and the second electrode signal line 332 are electrically connected to the touch driving module 340. Accordingly, the first common electrode block 321 is multiplexed as a first touch electrode block, and the second common electrode block 322 is multiplexed as a second touch electrode block.
In order to detect the touch position, the common electrode layer (touch electrode layer) includes a plurality of mutually independent first common electrode blocks 321 (first touch electrode blocks) and a plurality of mutually independent second common electrode blocks 322 (second touch electrode blocks), charges on the common electrode blocks (touch electrode blocks) are changed by sensing human charges, and the position where touch occurs is detected by detecting the change of charges on the common electrode blocks (touch electrode blocks).
The touch driving module 340 may output a touch signal, or may output a common voltage having the same voltage and different current. The touch driving module 340 may be disposed on a main board of the display device, for example, and the first electrode signal line 331 and the second electrode signal line 332 may be electrically connected to the touch driving module 340 through a flexible circuit board.
Illustratively, the driving method of the display panel comprises a display stage and a touch stage. In the display stage, the touch driving module 340 transmits a first driving signal to the first electrode signal line 331 and transmits a second driving signal to the second electrode signal line 332 to drive the pixel unit to emit light; the first driving signal and the second driving signal have the same voltage and different current. In the touch stage, the touch driving module 340 transmits touch signals to the first electrode signal line 331 and the second electrode signal line 332, respectively, to detect a touch position.
The embodiment of the invention is favorable for reducing the film thickness of the display panel by setting the common electrode layer as the touch electrode layer, thereby being favorable for thinning the display panel. However, each common electrode block (touch electrode block) is independent, and due to different areas, the coupling influence of the data lines is different, and in the display stage, if the same driving signals (the same voltage and current) are transmitted to each common electrode block (touch electrode block), the display panel may have uneven brightness, and the common electrode block (touch electrode block) may be visible. In the display stage, the thrust of the driving signal is adjusted according to different common electrode blocks (touch electrode blocks), so that the difference of time required for different common electrode blocks (touch electrode blocks) to reach the same common voltage value is reduced, the consistency of common voltage is enhanced, the visible phenomenon of the common electrode blocks (touch electrode blocks) is improved, and the display uniformity of the display panel is improved.
It should be noted that, in practical applications, the touch driving module 340 may be located on the display panel or located at other positions of the display device according to needs, which is not limited in the present invention.
It should be further noted that, in the above-mentioned embodiment, the common electrode block around the dug-hole region 311 is exemplarily set as the second common electrode block 322, and the invention is not limited thereto. In other embodiments, a shaped common electrode block adjacent to a shaped edge such as notch may also be provided as the second common electrode block 322.
Fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 4 is a simplified structural diagram of a region 401 in fig. 3. Referring to fig. 3 and fig. 4, on the basis of the foregoing embodiments, optionally, the display panel further includes: a plurality of switching units 350, a first common voltage signal line 361, and a second common voltage signal line 362. The first electrode signal line 331 is electrically connected to the first common voltage signal line 361 through the switching unit 350; the second electrode signal line 332 is electrically connected to a second common voltage signal line 362 through the switching unit 350.
The first common voltage signal line 361 connects the first electrode signal lines 331 through the switch unit 350, that is, the first common voltage signal line 361 connects the first common electrode blocks 321 through the switch unit 350, which is beneficial to improving the uniformity of the first common electrode blocks 321. The second common voltage signal line 362 connects the second electrode signal lines 332 through the switch unit 350, that is, the second common voltage signal line 362 connects the second common electrode blocks 322 through the switch unit 350, which is beneficial to improving the uniformity of the second common electrode blocks 322.
On the basis of the above embodiments, optionally, the first common voltage signal line 361 and the second common voltage signal line 362 are both electrically connected to a driving chip, and the driving chip transmits a driving signal to the first common voltage signal line 361, where the driving signal has the same voltage and current as the driving signal on the first common voltage signal line 361; the driving chip transmits a driving signal to the second common voltage signal line 362, and the voltage and current of the driving signal are the same as those of the driving signal on the second common voltage signal line 362.
Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 5, on the basis of the above embodiments, optionally, the display panel further includes a switch control signal line 370. The switching unit 350 includes transistors, a control terminal of each transistor is electrically connected to the switching control signal line 370, a first terminal of a part of the transistors is electrically connected to the first electrode signal line 331, and a second terminal is electrically connected to the first common voltage signal line 361; the first terminal of the partial transistor is electrically connected to the second electrode signal line 332, and the second terminal thereof is electrically connected to the second common voltage signal line 362.
Illustratively, the driving method of the display panel is to transmit a control signal to the switch control signal line 370 to control the plurality of switch units 350 to be turned on in the display stage, wherein the first common voltage signal line 361 is electrically connected to the first electrode signal line 331, and the second common voltage signal line 362 is electrically connected to the second electrode signal line 332; the touch driving module 340 transmits a first driving signal to the first electrode signal line 331 and a second driving signal to the second electrode signal line 332 to drive the pixel unit to emit light; the first driving signal and the second driving signal have the same voltage and different current. In the touch stage, a control signal is sent to the switch control signal line 370 to control the switch units 350 to be turned off, and the touch driving module 340 transmits a touch signal to the first electrode signal line 331 and the second electrode signal line 332 respectively to detect a touch position.
The switch unit 350 provided by the embodiment of the invention comprises a transistor, so that the structure is simple, the implementation is easy, and the cost is reduced.
In the above embodiments, the display panel includes the first electrode signal line 331 and the second electrode signal line 332 by way of example, which is not a limitation of the present invention. In other embodiments, the display panel may further include a plurality of electrode signal lines, the voltage of the driving signals on the plurality of electrode signal lines are the same, and the current of the driving signals is different, so as to determine the current more accurately according to the size of each common electrode block.
In addition, the inventor researches and discovers that other reasons for poor uniformity of the display panel include other aspects. As can be seen from the foregoing embodiments, the electrode signal line is input with a driving signal from one end of the electrode signal line by the driving chip and transmitted along the electrode signal line. The distances between the common electrode blocks and the driving chip are different, specifically, the common electrode block closer to the driving chip is called a near-end common electrode block, and the common electrode block farther from the driving chip is called a far-end common electrode block. Because the electrode signal wire electrically connected with the far-end common electrode block is longer in routing and larger in resistance value, and the electrode signal wire electrically connected with the near-end common electrode block is relatively shorter in length, the resistance values of the electrode signal wire connected with the near-end common electrode block and the electrode signal wire connected with the far-end common electrode block are different.
Fig. 6 is a schematic diagram illustrating a simulation that a common electrode block is affected by voltage coupling of data lines according to the related art. Referring to fig. 6, curves 211 and 212 are waveforms in which the data signal on the data varies between 0V and 5V; curves 221 and 222 are waveforms where the data signal on the data varies between 0V and-5V; the curve 231 is the variation waveform of the data signal coupled to the near-end common electrode block and pulled back to the normal voltage value, and the curve 232 is the variation waveform of the data signal coupled to the far-end common electrode block and pulled back to the normal voltage value. As can be seen from fig. 6, since the driving capability of the electrode signal line electrically connected to the near-end common electrode block is different from the driving capability of the electrode signal line electrically connected to the far-end common electrode block, after the near-end common electrode block and the far-end common electrode block are subjected to the coupling deviation, the degree of the electrode signal line being pulled back to the normal common voltage value is different within a certain time range, for example, at time t1, the voltage value of the near-end common electrode block is lower than that of the far-end common electrode block, and at time t2, the voltage value of the near-end common electrode block is higher than that of the far-end common electrode block. Therefore, the common voltage on the near-end common electrode block and the far-end common electrode block is not uniform, thereby causing a visible phenomenon of the common electrode block, and the display uniformity of the display panel is poor.
In view of this, the embodiment of the invention further provides a display panel suitable for the resistance difference of the electrode signal lines. Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 7, on the basis of the above-described embodiments, the display panel includes a first common electrode block 321, a second common electrode block 322, a third common electrode block 323, a first electrode signal line 331 electrically connected to the first common electrode block 321, a second electrode signal line 332 electrically connected to the second common electrode block 322, and a third electrode signal line 333 electrically connected to the third common electrode block 323. The voltages of the driving signals on the first electrode signal line 331, the second electrode signal line 332 and the third electrode signal line are all the same, and the currents are different.
The voltage of the driving signals on the first electrode signal line 331, the second electrode signal line 332 and the third electrode signal line 333 are the same, and the current is different, that is, the driving signals with different thrusts are provided to the first common electrode block 321, the second common electrode block 322 and the third common electrode block 323. Illustratively, the third common electrode block 323 is a distal common electrode block, the first common electrode block 321 is a proximal common electrode block, and the impedance of the third electrode signal line is greater than the impedance of the first electrode signal line 331; the voltages on the first electrode signal line 331 and the third electrode signal line 333 are the same, and the current on the third electrode signal line is larger than the current on the first electrode signal line 331. The current magnitudes of the driving signals on the second electrode signal line 332 and the third electrode signal line 333 may be set as required, and the present invention is not limited thereto.
The embodiment of the invention respectively adjusts the thrust of the driving signal aiming at the common electrode blocks with different areas and the common electrode blocks electrically connected with the electrode signal lines with different resistance values, and reduces the difference of the time required by different common electrode blocks to reach the same common voltage value, thereby enhancing the consistency of common voltage, improving the visible phenomenon of the common electrode blocks and improving the display uniformity of the display panel.
On the basis of the foregoing embodiments, optionally, the third common electrode block 323 is electrically connected to at least two third electrode signal lines 333, and the overall resistance of the at least two third electrode signal lines 333 is smaller, which is beneficial to reducing the resistance of the electrode signal line electrically connected to the far-end common electrode block, so as to reduce the difference in resistance between the near-end electrode signal line and the far-end electrode signal line.
In addition, compared to the case where the number of the third electrode signal lines 333 is increased, the number of the electrode signal lines is not increased by the case where the driving signal having different thrust is transmitted to the third electrode signal lines 333. Therefore, when the technical solution of increasing the number of the third electrode signal lines 333 is limited by the resolution and space of the display panel and the number of the traces needs to be limited, the technical solution of transmitting the driving signals with different thrusts to the third electrode signal lines 333 may be adopted as a supplementary solution.
It should be noted that, in the above embodiments, the display area surrounding the non-display area, that is, the display area surrounding the hole digging area 311, is exemplarily shown, and is not a limitation to the present invention. In other embodiments, the non-display area may be located at the edge of the display area, and may be set as needed in practical applications.
The embodiment of the invention also provides a display device. The display device includes: a driver chip and a display panel as provided in any of the embodiments of the present invention. The driving chip is electrically connected with the first electrode signal wire and the second electrode signal wire respectively. The display device can be, for example, a mobile phone, a tablet computer, an intelligent wearable device, an information inquiry machine in a hall of a public place, and the like. The display device comprises the display panel provided by any embodiment of the invention, the technical principle and the generated technical effect are similar, and the description is omitted here.
The embodiment of the invention also provides a driving method of the display panel, and the driving method is suitable for the display panel provided by any embodiment of the invention. Fig. 8 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention. Referring to fig. 8, the driving method of the display panel includes: s110, in a display stage, transmitting a first driving signal to a first electrode signal line and transmitting a second driving signal to a second electrode signal line; the first driving signal and the second driving signal have the same voltage and different current.
Illustratively, the area of the first common electrode block is larger than the area of the second common electrode block; the voltage on the first electrode signal line and the voltage on the second electrode signal line are the same, and the current on the second electrode signal line is smaller than the current on the first electrode signal line.
According to the embodiment of the invention, the first driving signal is transmitted to the first electrode signal line, the second driving signal is transmitted to the second electrode signal line, the first driving signal and the second driving signal have the same voltage and different currents, so that the first electrode signal line and the second electrode signal line respectively transmit the driving signals with different thrusts to the first common electrode block and the second common electrode block. The voltage of the driving signals on the first electrode signal line and the second electrode signal line are the same, and the voltages on the first common electrode block and the second common electrode block can be ensured to finally reach the same common voltage value. Compared with the prior art, the embodiment of the invention realizes the adjustment of the thrust of the driving signal aiming at different common electrode blocks, and reduces the difference of the time required by different common electrode blocks to reach the same common voltage value, thereby enhancing the consistency of the common voltage, improving the visible phenomenon of the common electrode blocks and improving the display uniformity of the display panel. Particularly, when a heavy load picture is displayed, the improvement effect of the embodiment of the invention on the uniformity of the display is more obvious.
With continued reference to fig. 8, on the basis of the foregoing embodiments, optionally, the method for driving a display panel further includes: and S120, respectively transmitting touch signals to the first electrode signal line and the second electrode signal line in a touch control stage. The embodiment of the invention is favorable for reducing the film thickness of the display panel by setting the common electrode layer as the touch electrode layer, thereby being favorable for thinning the display panel. Correspondingly, the driving method of the display panel comprises a display stage and a touch stage, wherein in the display stage, a common voltage signal is respectively transmitted to the first electrode signal line and the second electrode signal line, and in the touch stage, a touch signal is respectively transmitted to the first electrode signal line and the second electrode signal line.
Fig. 9 is a flowchart illustrating another driving method of a display panel according to an embodiment of the invention. Referring to fig. 9, the driving method of the display panel includes the following steps.
And S310, in the display stage, controlling the plurality of switch units to be conducted, wherein the first common voltage signal line is electrically connected with the first electrode signal line, and the second common voltage signal line is electrically connected with the second electrode signal line.
S320, transmitting a first driving signal to the first electrode signal line and transmitting a second driving signal to the second electrode signal line; the first driving signal and the second driving signal have the same voltage and different current.
S330, controlling the switch units to be switched off in the touch control stage.
And S340, respectively transmitting touch signals to the first electrode signal line and the second electrode signal line.
In the embodiment of the invention, the switch unit is conducted in the display stage, so that the first common voltage signal line can be communicated with each first electrode signal line, and the uniformity of each first common electrode block can be improved; and the second common voltage signal line is communicated with each second electrode signal line, so that the uniformity of each second common electrode block is favorably improved.
On the basis of the foregoing embodiments, optionally, the driving method of the display panel includes: and in the display stage, transmitting a first driving signal to the first electrode signal line, transmitting a second driving signal to the second electrode signal line, and transmitting a third driving signal to the third electrode signal line. The first driving signal, the second driving signal and the third driving signal have the same voltage and different current.
Illustratively, the area of the first common electrode block is larger than the area of the second common electrode block; the impedance of the third electrode signal line is greater than the impedance of the first electrode signal line. In the display stage, the voltages on the first electrode signal line, the second electrode signal line and the third electrode signal line are the same, the current on the second electrode signal line is smaller than the current on the first electrode signal line, and the current on the third electrode signal line is larger than the current on the first electrode signal line.
The embodiment of the invention respectively adjusts the thrust of the driving signal aiming at the common electrode blocks with different areas and the common electrode blocks electrically connected with the electrode signal lines with different resistance values, and reduces the difference of the time required by different common electrode blocks to reach the same common voltage value, thereby enhancing the consistency of common voltage, improving the visible phenomenon of the common electrode blocks and improving the display uniformity of the display panel.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. A display panel, comprising: the display device comprises a display area and a non-display area, wherein the non-display area comprises a hole digging area;
the display panel further comprises a common electrode layer; the projection of the common electrode layer on the display panel is positioned in the display area; the common electrode layer comprises a plurality of first common electrode blocks and second common electrode blocks; the second common electrode block is arranged between the dug hole area and the first common electrode block, or the second common electrode block is arranged between the dug hole area and the edge of the display panel;
a first electrode signal line electrically connected to the first common electrode block;
a second electrode signal line electrically connected to the second common electrode block;
the voltage of the driving signals on the first electrode signal line and the second electrode signal line are the same, and the current is different;
the third common electrode block and a third electrode signal wire are electrically connected with the third common electrode block;
the voltage of the driving signals on the first electrode signal line, the second electrode signal line and the third electrode signal line are the same, and the current is different.
2. The display panel according to claim 1, wherein the common electrode layer is multiplexed as a touch electrode layer;
the first electrode signal line and the second electrode signal line are electrically connected with the touch control driving module.
3. The display panel according to claim 1, further comprising: a plurality of switching units, a first common voltage signal line, and a second common voltage signal line;
wherein the first electrode signal line is electrically connected with the first common voltage signal line through the switching unit; the second electrode signal line is electrically connected with the second common voltage signal line through the switching unit.
4. The display panel according to claim 1, wherein the first common electrode block has an area larger than that of the second common electrode block;
the voltage on the first electrode signal line and the voltage on the second electrode signal line are the same, and the current on the second electrode signal line is smaller than the current on the first electrode signal line.
5. The display panel according to claim 1, wherein an impedance of the third electrode signal line is larger than an impedance of the first electrode signal line;
the voltage on the first electrode signal line and the voltage on the third electrode signal line are the same, and the current on the third electrode signal line is larger than the current on the first electrode signal line.
6. The display panel according to claim 1, wherein the display region surrounds the non-display region.
7. The display panel according to claim 1, wherein the non-display region is located at an edge of the display region.
8. A display device, comprising: a driving chip and the display panel according to any one of claims 1 to 7;
the driving chip is electrically connected with the first electrode signal wire and the second electrode signal wire respectively.
9. A driving method of a display panel, the display panel comprising: the display device comprises a display area and a non-display area, wherein the non-display area comprises a hole digging area;
the display panel further comprises a common electrode layer; the projection of the common electrode layer on the display panel is positioned in the display area; the common electrode layer comprises a first common electrode block and a plurality of second common electrode blocks; the second common electrode block is arranged between the dug hole area and the first common electrode block, or the second common electrode block is arranged between the dug hole area and the edge of the display panel;
a first electrode signal line electrically connected to the first common electrode block;
a second electrode signal line electrically connected to the second common electrode block;
the driving method of the display panel includes:
in a display stage, transmitting a first driving signal to the first electrode signal line and transmitting a second driving signal to the second electrode signal line; the first driving signal and the second driving signal have the same voltage and different current;
the area of the first common electrode block is larger than that of the second common electrode block; the impedance of the third electrode signal line is greater than the impedance of the first electrode signal line;
the voltage magnitudes of the first driving signal, the second driving signal and the third driving signal are the same, and the current magnitudes include:
the voltages on the first electrode signal line, the second electrode signal line and the third electrode signal line are the same, the current on the second electrode signal line is smaller than the current on the first electrode signal line, and the current on the third electrode signal line is larger than the current on the first electrode signal line.
10. The method for driving a display panel according to claim 9, wherein the common electrode layer is multiplexed as a touch electrode layer; the first electrode signal line and the second electrode signal line are electrically connected with the touch control driving module;
the driving method of the display panel further includes:
and in a touch control stage, respectively transmitting touch control signals to the first electrode signal line and the second electrode signal line.
11. The method for driving a display panel according to claim 10, wherein the display panel further comprises: a plurality of switching units, a first common voltage signal line, and a second common voltage signal line; the first electrode signal line is electrically connected with the first common voltage signal line through the switch unit; the second electrode signal line is electrically connected with the second common voltage signal line through the switch unit;
the driving method of the display panel further includes:
before transmitting a first driving signal to the first electrode signal line and a second driving signal to the second electrode signal line, the method further includes:
controlling the plurality of switch units to be conducted, wherein the first common voltage signal line is electrically connected with the first electrode signal line, and the second common voltage signal line is electrically connected with the second electrode signal line;
before transmitting a touch signal to the first electrode signal line and the second electrode signal line, respectively, the method further includes:
and controlling the plurality of switch units to be switched off.
12. The driving method of the display panel according to claim 9, wherein an area of the first common electrode block is larger than an area of the second common electrode block;
the first driving signal and the second driving signal have the same voltage, and the different current magnitudes include:
the voltage on the first electrode signal line and the voltage on the second electrode signal line are the same, and the current on the second electrode signal line is smaller than the current on the first electrode signal line.
13. The method for driving a display panel according to claim 9, wherein the display panel further comprises: the third common electrode block and a third electrode signal wire are electrically connected with the third common electrode block;
the driving method of the display panel includes:
in a display stage, transmitting a first driving signal to the first electrode signal line, transmitting a second driving signal to the second electrode signal line, and transmitting a third driving signal to the third electrode signal line;
the first driving signal, the second driving signal and the third driving signal have the same voltage and different current.
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| TWI486695B (en) * | 2012-07-05 | 2015-06-01 | Au Optronics Corp | Liquid crystal display panel and display driving method |
| KR102141593B1 (en) * | 2014-01-17 | 2020-08-06 | 삼성디스플레이 주식회사 | Liquid crystal display |
| CN104777942B (en) * | 2015-05-08 | 2018-02-06 | 厦门天马微电子有限公司 | Touch-control display panel, driving method and touch control display apparatus |
| CN106531111B (en) * | 2017-01-03 | 2019-11-12 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display device |
| CN106873225B (en) * | 2017-04-27 | 2020-06-26 | 厦门天马微电子有限公司 | Array substrate, display panel, display device and array substrate driving method |
| CN107357096B (en) * | 2017-07-31 | 2020-01-21 | 厦门天马微电子有限公司 | Special-shaped touch display panel and display device |
| CN107608145B (en) * | 2017-09-19 | 2020-05-15 | 厦门天马微电子有限公司 | Special-shaped display panel and display device |
| CN108550339A (en) * | 2018-04-26 | 2018-09-18 | 武汉华星光电技术有限公司 | Improve the method for special-shaped panel plate display quality and special-shaped panel plate |
| CN109003989B (en) * | 2018-07-27 | 2020-08-21 | 厦门天马微电子有限公司 | Array substrate, preparation method thereof, display panel and display device |
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