CN107656651B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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CN107656651B
CN107656651B CN201710935564.8A CN201710935564A CN107656651B CN 107656651 B CN107656651 B CN 107656651B CN 201710935564 A CN201710935564 A CN 201710935564A CN 107656651 B CN107656651 B CN 107656651B
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touch electrode
electrode block
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display panel
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CN107656651A (en
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金慧俊
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Nonlinear Science (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
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  • Position Input By Displaying (AREA)
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Abstract

The embodiment of the invention discloses a display panel and a display device. The display panel comprises a plurality of first-type touch electrode blocks and a plurality of second-type touch electrode blocks; the first type of touch electrode block is a special-shaped touch electrode block; the length of the second type of touch electrode blocks positioned in the same row with the first type of touch electrode blocks along the column direction is greater than the length of the second type of touch electrode blocks positioned in the adjacent row with the first type of touch electrode blocks along the column direction; the ratio of the area value of the first type of touch electrode block to the area value of the second type of touch electrode block which is positioned in the same row with the first type of touch electrode block is greater than or equal to 1/2; the first type of touch electrode block and the second type of touch electrode block are multiplexed as a common electrode. Compare with current display panel, the display panel that this application provided can improve display panel's display effect.

Description

Display panel and display device
Technical Field
Embodiments of the present invention relate to display technologies, and in particular, to a display panel and a display device.
Background
With the development of display technology, the demands of users are more and more diversified. The conventional rectangular display panel has been unable to satisfy diversified display and use requirements of users. Accordingly, the display panel with a special shape is becoming a development direction of the display technology.
The conventional special-shaped display panel is not in a traditional rectangular shape, the local edge of the conventional special-shaped display panel often has special-shaped edges such as round corners or grooves, and the first type of touch electrode blocks arranged near the special-shaped edges are not in the traditional rectangular shape and are correspondingly adjusted along with the special-shaped edges. Except the first type of touch electrode blocks arranged near the special-shaped edge in the special-shaped display panel, the other second type of touch electrode blocks are still arranged in a rectangular shape. That is, in the existing special-shaped display panel, the first type of touch electrode block and the second type of touch electrode block have different shapes. Research shows that the existing special-shaped display panel has touch electrode blocks with two shapes, so that the special-shaped display panel has poor display effect.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for improving the display effect of a special-shaped display panel.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel is a special-shaped display panel;
the display panel comprises at least one first-type touch electrode block and at least one second-type touch electrode block; the first type of touch electrode block and the second type of touch electrode block are different in shape, and the first type of touch electrode block is an irregular touch electrode block;
the at least one first type of touch electrode block and the at least one second type of touch electrode block are arranged together to form an array structure with m rows and n columns, wherein m and n are positive integers, m is more than or equal to 2, and n is more than or equal to 2;
the length of the second type of touch electrode blocks positioned in the same row with the first type of touch electrode blocks along the column direction is greater than the length of the second type of touch electrode blocks positioned in the adjacent row with the first type of touch electrode blocks along the column direction;
the ratio of the area value of the first type of touch electrode block to the area value of the second type of touch electrode block which is positioned in the same row with the first type of touch electrode block is greater than or equal to 1/2;
the first type of touch electrode block and the second type of touch electrode block are multiplexed as a common electrode.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes any one of the display panels provided in the embodiments of the present invention.
In the embodiment of the invention, the length of the second type of touch electrode block positioned in the same row with the first type of touch electrode block along the column direction is set to be greater than the length of the second type of touch electrode block positioned in the adjacent row with the first type of touch electrode block along the column direction; and the ratio of the area value of the first type of touch electrode block to the area value of the second type of touch electrode block which is positioned in the same line with the first type of touch electrode block is greater than or equal to 1/2, so that the problem that the display effect of the display panel is poor due to the fact that the existing special-shaped display panel has the touch electrode blocks with two shapes is solved, and the purpose of improving the display effect of the display panel is achieved.
Drawings
Fig. 1 is a schematic plan view of a conventional display panel;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is an enlarged view of region D of FIG. 2;
fig. 4 is a schematic diagram illustrating an operating state of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 shows the ratio of the light transmittance of the pixel unit corresponding to the first type of touch electrode block to the light transmittance of the pixel unit corresponding to the second type of touch electrode block when M is 0.5
Figure GDA0002577379220000031
And VpixelFA graph of variation relationships of (2);
fig. 7 shows the ratio of the light transmittance of the pixel unit corresponding to the first type of touch electrode block to the light transmittance of the pixel unit corresponding to the second type of touch electrode block when M is 2/3
Figure GDA0002577379220000032
And VpixelFA graph of variation relationships of (2);
fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another first type of touch electrode block according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present 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 irregular display panel is not in the shape of a conventional rectangle, and the local edge of the display panel often has irregular edges such as rounded corners or grooves, and the first type of touch electrode blocks disposed near the irregular edges are also not in the shape of a conventional rectangle, but are adjusted correspondingly along with the irregular edges, so that the touch electrode blocks at different positions on the display panel have different shapes or sizes. Fig. 1 is a schematic plan view of a conventional display panel. Referring to fig. 1, the display panel 10 is not a conventional quadrilateral in shape, with rounded corners 11. The display panel 10 includes a plurality of touch electrode blocks arranged in an array, and the touch electrode blocks are used for implementing a touch function. The touch electrode blocks include a first type touch electrode block 131 and a second type touch electrode block 132. The first type touch electrode block 131 is located near the rounded corner 11 and is fan-shaped, and the second type touch electrode block 132 is far away from the rounded corner 11 and is rectangular.
With reference to fig. 1, in the conventional irregular display panel, the lengths of the second touch electrode blocks 132 in the column direction are d10, and the lengths in the row direction are d 11. In order to adapt to the irregular edge of the display panel, the length of the first type touch electrode block 131 in the column direction is often less than or equal to d10, and the length of the first type touch electrode block 131 in the row direction is often less than or equal to d 11. In fig. 1, for example, the length of each second type touch electrode block 132 in the column direction is equal to the length of the first type touch electrode block 131 in the column direction, and the length of each second type touch electrode block 132 in the row direction is equal to the length of the first type touch electrode block 131 in the row direction.
With continued reference to fig. 1, assuming that the area of the graph surrounded by the arc line m5, the straight line m2, and the straight line m4 is S2, the area of the graph surrounded by the arc line m5, the straight line m1, and the straight line m3 is S1, and the area of the graph surrounded by the straight line m2, the straight line m4, the straight line m1, and the straight line m3 is S3 (not shown in fig. 1), then S3 is equal to S1+ S2, the area of the first touch electrode block 131 is equal to S2, the area of the second touch electrode block 132 is equal to S3, and then the area of the first touch electrode block 131 is smaller than the area of the second touch electrode block 132. Research shows that the difference between the coupling capacitances of the first type touch electrode block 131 and the second type touch electrode block 132 and the scan lines or the data lines in the display panel is large because the area of the first type touch electrode block 131 is different from the area of the second type touch electrode block 132, which may affect the display effect of the display panel.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Fig. 3 is an enlarged schematic view of a region D in fig. 2. Referring to fig. 2 and 3, the display panel 10 is a shaped display panel. The display panel 10 includes at least one first type touch electrode block 131 and at least one second type touch electrode block 132; the first type of touch electrode block 131 and the second type of touch electrode block 132 have different shapes, and the first type of touch electrode block 131 is a special-shaped touch electrode block; the at least one first-type touch electrode block 131 and the at least one second-type touch electrode block 132 are arranged together to form an array structure with m rows and n columns, where m and n are positive integers, and m is greater than or equal to 2, and n is greater than or equal to 2 (in fig. 2, m is 10, and n is 7 for example); the length d1 of the second type touch electrode block 132 in the column direction, which is located in the same row as the first type touch electrode block 131, is greater than the length d2 of the second type touch electrode block 132 in the column direction, which is located in the adjacent row to the first type touch electrode block 131; the ratio of the area value of the first type touch electrode block 131 to the area value of the second type touch electrode block 132 positioned in the same row as the first type touch electrode block 131 is greater than or equal to 1/2; the first type touch electrode block 131 and the second type touch electrode block 132 are multiplexed as a common electrode.
The shape of the second type touch electrode block 132 is a regular shape, such as a polygon. In fig. 2, the second type touch electrode block 132 has a quadrilateral shape.
The first type of touch electrode block 131 is a special-shaped touch electrode block. The irregular touch electrode block is designed to be adapted to irregular edges such as rounded corners or grooves in the display panel, and is different from the conventional shape of the second type touch electrode block 132 in shape or is far different from the conventional size of the second type touch electrode block 132 in size. Illustratively, the shape of the first type touch electrode block 131 at least includes a fan shape and/or a step shape. In fig. 2, the first type touch electrode block 131 has a fan shape. Since the rounded corners 11 of the display panel are located at the four corners of the display panel in fig. 2, correspondingly, the fan-shaped first-type touch electrode blocks 131 are also located at the four corners of the display panel.
With continued reference to fig. 2 and 3, it is assumed that in the conventional display panel, each of the first type touch electrode blocks 131 and the second type touch electrode blocks 132 located in the same row as the first type touch electrode blocks 131 have a length d10 along the column direction. In the present application, the length d1 of the second type touch electrode block 132 in the column direction, which is located in the same row as the first type touch electrode block 131, is set to be greater than the length d2 of the second type touch electrode block 132 in the column direction, which is located in the adjacent row to the first type touch electrode block 131, by adjusting the position of the notch between the line L1 where the first type touch electrode block 131 is located and the adjacent line L2 of the first type touch electrode block 131, the lengths of the first type touch electrode blocks 131 and the second type touch electrode blocks 132 in the L1 row along the column direction are increased, and finally, the length d1 of each touch electrode block (including the first type touch electrode blocks 131 and the second type touch electrode blocks 132) in the L1 row along the column direction in the application is greater than the length d10 of each touch electrode block (including the first type touch electrode blocks 131 and the second type touch electrode blocks 132) in the L1 row along the column direction in the conventional display panel.
Considering that in a display panel with a certain size, under the condition that the touch resolution of the display panel is not changed, the length of a certain row of touch electrode blocks (including the first type touch electrode blocks 131 and the second type touch electrode blocks 132) along the column direction is increased, and the length of the touch electrode blocks along the column direction in other rows adjacent to the row is necessarily reduced. This may cause the area value of the second type touch electrode block 132 located in the same row as the first type touch electrode block 131 to be often larger than the area value of the second type touch electrode block 132 located in a different row from the first type touch electrode block 131. Therefore, in the display panel, the area value of the second type touch electrode block 132 located in the same row as the first type touch electrode block 131 tends to be the largest.
With reference to fig. 3, it is assumed that, in the existing display panel, the edges of the touch electrode blocks (including the first type touch electrode block 131 and the second type touch electrode block 132) in the L1 row, which are close to the L2 row, are located on a straight line m2, the length of the first type touch electrode block 131 in the row direction is d12, the length of the second type touch electrode block 132 in the row direction is d11, and d12 < d 11. The length of the first type touch electrode block 131 in the column direction and the length of the second type touch electrode block 132 in the column direction are both d 10. In the conventional display panel, the area value a1 of the first type touch electrode block 131 in the L1 row satisfies, a1 < d10 · d 12; the area value a2 of the second type touch electrode block 132 in the L1 row satisfies a2 ═ d10 · d 11. In the conventional display panel, the ratio of the area value of the first type touch electrode block 131 in the L1 row to the area value of the second type touch electrode block 132 in the L1 row is
Figure GDA0002577379220000071
In the application, by adjusting the position of the notch between the line L1 where the first type touch electrode block 131 is located and the line L2 adjacent to the first type touch electrode block 131, the notch between the line L1 and the line L2 moves in the direction close to the line L3. At this time, the edges of the touch electrode blocks (including the first type touch electrode block 131 and the second type touch electrode block 132) in the L1 row, which are close to the L2 row, are located on a straight line m6, so that the area value of the first type touch electrode block 131 in the L1 row becomes a1+ A3; the area value of the second type touch electrode pad 132 in the L1 row becomes a2+ a 4. Let the distance between the straight line m2 and the straight line m6 be d 13. According to the geometrical relationship, A4 is d13 d11, and A4 is more than or equal to A3 > d13 d 12. That is, in the present application, the ratio of the area value of the first type touch electrode block 131 in the L1 row to the area value of the second type touch electrode block 132 in the L1 row is
Figure GDA0002577379220000072
Figure GDA0002577379220000073
And because of that,
Figure GDA0002577379220000074
so as to obtain the compound with the characteristics of,
Figure GDA0002577379220000075
A3A2-A1A4＞0。
then the process of the first step is carried out,
Figure GDA0002577379220000076
namely, it is
Figure GDA0002577379220000077
The above analysis shows that, compared with the conventional display panel, the ratio of the area value of the first type touch electrode block 131 in the L1 row to the area value of the second type touch electrode block 132 in the L1 row is relatively large in the present application. As described above, in the display panel, the area value of the second type touch electrode block 132 located in the same row as the first type touch electrode block 131 is often the largest. That is, compared with the existing display panel, in the technical solution provided in the present application, by setting the length d1 of the second type touch electrode block 132 in the column direction, which is located in the same row as the first type touch electrode block 131, to be greater than the length d2 of the second type touch electrode block 132 in the column direction, which is located in the adjacent row to the first type touch electrode block 131, the difference between the first type touch electrode block 131 and the second type touch electrode block 132 with the largest area value on the display panel is substantially reduced.
Fig. 4 is a schematic diagram of an operating state of a display panel according to an embodiment of the present invention. Referring to fig. 4 and 2, the working time of one frame of the display panel includes a display phase a and a touch phase B. When the display panel is in the display stage a, providing a common voltage signal to the first type touch electrode block 131 and the second type touch electrode block 132; when the display panel is in the touch stage B, the touch driving signals are provided to the first type touch electrode block 131 and the second type touch electrode block 132. The first type of touch electrode block 131 and the second type of touch electrode block 132 are both arranged to be reused as the common electrode, only one etching process is needed in the manufacturing process, and no mask plate needs to be manufactured on the first type of touch electrode block 131, the second type of touch electrode block 132 and the common electrode respectively, so that the cost is saved, the number of manufacturing processes is reduced, the production efficiency is improved, and meanwhile, the thickness of the display panel can be reduced.
Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 5, the display panel 10 includes a base substrate 12, a plurality of scan lines 14 and a plurality of data lines 15 formed on the base substrate 12. The plurality of scan lines 14 and the plurality of data lines 15 cross to define a plurality of pixel units 16 including pixel electrodes 17 and thin film transistors 18. The gate of the thin film transistor 18 is connected to the scanning line 14, the signal input terminal of the thin film transistor 18 is connected to the data line 15, and the signal output terminal of the thin film transistor 18 is connected to the pixel electrode 17. The display panel further includes a touch electrode block 13. The vertical projection of at least part of the scanning lines 14 and at least part of the data lines 15 on the substrate base plate 12 is positioned in the vertical projection of the touch electrode block 13 on the substrate base plate 12. It should be noted that the touch electrode block 13 includes a first type touch electrode block and a second type touch electrode block.
In the display phase a, a scan voltage is supplied to the scan lines 14 row by row to control the thin film transistors 18 connected to the scan lines 14 to be turned on, so that the data signals on the data lines 15 can be transmitted to the pixel electrodes 17. A common voltage signal is provided to the touch electrode block 13, so that the touch electrode block 13 and the pixel electrode 17 form an electric field, thereby controlling the liquid crystal corresponding to the pixel unit 16 to turn over.
In practical operation, the voltage value V' of the common voltage signal provided to the touch electrode block 13 in the display stage a and the voltage value V of the touch driving signal provided to the touch electrode block 13 in the touch stage B0Different. In general, the voltage value V' of the common voltage signal provided to the touch electrode block 13 in the display stage a is smaller than the voltage value V of the touch driving signal provided to the touch electrode block 13 in the touch stage B0. Research shows that when the display panel is transited from the touch stage B to the display stage A, the potential on the touch electrode block 13 is transited from V0Gradually decreases until it becomes V'. When the display panel is transited from the touch stage B to the display stage a, the potential V at any time (current time) on the touch electrode block 13 satisfies the following formula
Figure GDA0002577379220000091
Wherein Δ V ═ V0V', t is the time length from the end of the display period a to the current time, R is the resistance of the touch electrode block 13, C is the coupling capacitance of the touch electrode block 13 and the scan line 14 or the data line 15, and e is the natural logarithm.
According to the formula
Figure GDA0002577379220000092
Where C is a coupling capacitance value of the touch electrode block 13 and the scan line 14 or the data line 15, which is a constant, S is a facing area of the touch electrode block 13 and the scan line 14 or the data line 15, d is a distance between the touch electrode block 13 and the scan line 14 or the data line 15, and k is an electrostatic force constant. According to the above formula, for a certain display panel, since the distance d between the touch electrode block 13 and the scan line 14 or the data line 15 is a fixed value, the coupling capacitance C between the touch electrode block 13 and the scan line 14 or the data line 15 in the display panel is related to the area value S of the touch electrode block 13, and the area value S of the touch electrode block 13 can be used to represent the magnitude of the coupling capacitance C between the touch electrode block 13 and the scan line 14 or the data line 15 in the display panel.
For simplicity of description, let C ═ KS, where K is a constant, then
Figure GDA0002577379220000101
Assuming that the average value of the areas of the second type touch electrode blocks 132 is F and the area value of the first type touch electrode blocks 131 is E, let
Figure GDA0002577379220000102
Neglecting the difference between the resistance values of the first type touch electrode block 131 and the second type touch electrode block 132
Figure GDA0002577379220000103
Let C be KF or KF,
Figure GDA0002577379220000104
v is obtained by utilizing partial derivative to obtain extreme valueF-VEMaximum value of (1), order
Figure GDA0002577379220000105
Is obtained by
Figure GDA0002577379220000106
When, VF-VEHas a maximum value of VF-VEHas a maximum value of
Figure GDA0002577379220000107
Assume that the voltage V' of the common voltage signal supplied to the touch electrode block 13 in the display phase a is-1.5V, and the voltage V of the touch driving signal supplied to the touch electrode block 13 in the touch phase B0＝3V。
Figure GDA0002577379220000111
Suppose the turn-on voltage of the thin film transistor 18 is VGH15V, the turn-off voltage V of the thin film transistor 18GL-10V, i.e. the feed-through ratio of the pixel cell 16 is
Figure GDA0002577379220000112
That is, in the process of the touch electrode block 13 transitioning from the touch stage B to the display stage a, in the pixel unit 16, the voltage difference between the touch electrode block 13 and the pixel electrode 17 also changes by 0.06 times, that is, the voltage difference is changed
Figure GDA0002577379220000113
Wherein, VpixelFIs the second type touch electrode in the pixel unit corresponding to the second type touch electrode block 132The voltage difference, V, between the block 132 and the pixel electrode 17pixelEIs the voltage difference between the first type touch electrode block 131 and the pixel electrode 17 in the pixel unit corresponding to the first type touch electrode block 131.
From the above formula, V can be obtainedpixelFAnd VpixelECorresponding relationship between them. Assuming other conditions are the same, V is subjected to simulationpixelFIn the range of 1.5V-5V, the ratio of the light transmittance T1 of the pixel cell corresponding to the first type touch electrode block 131 to the light transmittance T2 of the pixel cell corresponding to the second type touch electrode block 132
Figure GDA0002577379220000114
The study was conducted. Fig. 6 shows the ratio of the light transmittance T1 of the pixel cell corresponding to the first type touch electrode block 131 to the light transmittance T2 of the pixel cell corresponding to the second type touch electrode block 132 when M is 0.5
Figure GDA0002577379220000115
And VpixelFA graph of the variation relationship of (c). Referring to fig. 6, the ratio of the light transmittance T1 of the pixel cell corresponding to the first type touch electrode block 131 to the light transmittance T2 of the pixel cell corresponding to the second type touch electrode block 132
Figure GDA0002577379220000116
The minimum value is about 0.75, that is, the light transmittance T1 of the pixel unit corresponding to the first type touch electrode block 131 is at least 0.75 times of the light transmittance T2 of the second type touch electrode block 132.
Through testing, when the light transmittance T1 of the pixel unit corresponding to the first type of touch electrode block 131 is 0.75 times or more of the light transmittance T2 of the second type of touch electrode block 132, human eyes cannot feel the difference, that is, under the condition, the influence on the display effect of the display panel is negligible due to the difference in the light transmittance of the pixel unit caused by the difference in the areas of the second type of touch electrode block 132 and the first type of touch electrode block 131.
Further, in the display panel, the area value of the second type touch electrode block 132 located in the same row as the first type touch electrode block 131 tends to be the largest, and by setting the ratio of the area value of the first type touch electrode block 131 to the area value of the second type touch electrode block 132 located in the same row as the first type touch electrode block 131 to be greater than or equal to 1/2, in essence, the difference between the area of the first type touch electrode block 131 and the area of the second type touch electrode block 132 having the largest area in the display panel is further reduced, so that the problem that the display effect of the display panel is poor due to the presence of two types of touch electrode block electrodes in the existing special-shaped display panel is solved, and the purpose of improving the display effect of the display panel is achieved.
Fig. 7 shows the ratio of the light transmittance of the pixel unit corresponding to the first type of touch electrode block to the light transmittance of the pixel unit corresponding to the second type of touch electrode block when M is 2/3
Figure GDA0002577379220000121
And VpixelFA graph of the variation relationship of (c). Referring to fig. 7, the ratio of the light transmittance T1 of the pixel cell corresponding to the first type touch electrode block 131 to the light transmittance T2 of the pixel cell corresponding to the second type touch electrode block 132
Figure GDA0002577379220000122
The minimum value is about 0.84. Accordingly, the ratio of the area value of the first type touch electrode block 131 to the area value of the second type touch electrode block 132 in the same row as the first type touch electrode block 131 can be set to be greater than or equal to 2/3, which can further improve the display effect of the display panel.
In a specific arrangement, in order to achieve the purpose that the length of the second type touch electrode block located in the same row as the first type touch electrode block along the column direction is greater than the length of the second type touch electrode block located in an adjacent row to the first type touch electrode block along the column direction, various design schemes may be adopted, and a typical example is described in detail below, but the present application is not limited thereto.
Fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 8, the second-type touch electrode blocks 132 located in the same row have the same size; the length d3 of each second-type touch electrode block 132 in the odd-numbered rows along the column direction is greater than the length d4 of each second-type touch electrode block 132 in the even-numbered rows along the column direction. The advantage of setting up like this is, simple manufacture technology, the actual operation of being convenient for, and difficult short circuit disconnection problem that appears. In addition, the display effect of the display panel is not affected by the arrangement.
Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention. For example, as shown in fig. 9, the sizes of the second type touch electrode block 132-1 and the second type touch electrode block 132-2 in the row L1 are different, and the sizes of the second type touch electrode block 132-3 and the second type touch electrode block 132-4 in the row L2 are different, which certainly causes the notch n1 between the second type touch electrode block 132-1 and the second type touch electrode block 132-3 and the notch n2 between the second type touch electrode block 132-2 and the second type touch electrode block 132-4 to be not on the same straight line. In the display panel, the pixel units are regularly arranged in a matrix form. If the notch n1 is located right between two adjacent pixel units, since the notch n2 and the notch n1 are not on the same straight line, it is possible to make the vertical projection of the notch n2 on the substrate coincide with the vertical projection of at least part of the pixel units on the substrate. When displaying an image, a part of light rays will pass through the touch electrode blocks (including the first type touch electrode block 131 and the second type touch electrode block 132) to exit, and another part of light rays will directly exit from the slits (such as the slits n1 and n2) between two adjacent touch electrode blocks. Because the paths of the light rays emitted through the touch electrode blocks and the light rays directly emitted from the notches between two adjacent touch electrode blocks are different, the brightness of the two light rays is different, and the display panel is easy to display unevenly.
Compared with fig. 9, in the display panel provided in fig. 8, the second touch electrode blocks 132 located in the same row have the same size, which is beneficial to enable the slits between all two adjacent touch electrode blocks to be disposed between the adjacent rows (or adjacent columns) of pixel units, that is, the vertical projection of the slits between two adjacent touch electrode blocks on the substrate coincides with the vertical projection of the data line or the scanning line on the substrate, so as to shield the light directly emitted from the slits between two adjacent touch electrode blocks by using the black matrix in the display panel, and enable all the light finally used for image display to pass through the touch electrode blocks (including the first touch electrode blocks 131 and the second touch electrode blocks 132), so as to solve the problem of display panel display non-uniformity, and not to affect the display effect of the display panel.
Optionally, the sizes of the second touch electrode blocks 132 in the same row may also be set to be the same; if the first type touch electrode block 131 is located in the p-th row, the length of any second type touch electrode block 132 located in the p-th row along the column direction is greater than the length of each second type touch electrode block 132 located in the p + 1-p + q rows along the column direction, and the length of any second type touch electrode block 132 located in the p + 1-p + q rows along the column direction is greater than the length of each second type touch electrode block 132 located in the p + q + d row along the column direction; wherein p, q and d are natural numbers, p is more than or equal to 1 and less than p +1 and more than p + q + d and less than or equal to m/2, and m is more than or equal to 6. The advantage of setting up like this is, simple manufacture technology, the actual operation of being convenient for, and difficult short circuit disconnection problem that appears. Similarly, by such an arrangement, it is beneficial to arrange all the slits between adjacent rows (or adjacent columns) of pixel units, that is, the vertical projection of the slit between two adjacent touch electrode blocks on the substrate coincides with the vertical projection of the data line or the scanning line on the substrate, so as to use the black matrix in the display panel to block the light directly emitted from the slit between two adjacent touch electrode blocks, and make all the light finally used for image display pass through the touch electrode blocks (including the first type touch electrode block 131 and the second type touch electrode block 132), so as to solve the problem of display unevenness of the display panel, and not to affect the display effect of the display panel.
Fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention. It should be noted that the column direction includes two directions, i.e., a positive X-axis direction and a negative X-axis direction. When determining which row the touch electrode block is located in specifically, the calculation may be selected to be performed along the positive direction of the X axis, or may be selected to be performed along the negative direction of the X axis. However, the determination manner of the column direction is different, and the finally determined row number is different. For example, referring to fig. 10, line L is row 7, calculated with the positive X-axis direction as the column direction; calculated with the negative X-axis direction as the column direction, row L is row 4.
With continued reference to fig. 10, the first type touch electrode block 131 includes a first type touch electrode block 1311 and a second type touch electrode block 1312 by taking the negative X-axis direction as the column direction. The first touch electrode block 1311 is located on the 1 st row, and the second touch electrode block 1312 is located on the 10 th row. For the first type of touch electrode block 1311, optionally, the length d5 of any one of the second type of touch electrode blocks 132 in the row 1 along the column direction (i.e., the negative direction of the X axis in fig. 10) is greater than the length d6 of each of the second type of touch electrode blocks 132 in the row 2 to the row 3 along the column direction (i.e., the negative direction of the X axis in fig. 10), and the length d6 of any one of the second type of touch electrode blocks 132 in the row 2 to the row 3 along the column direction is greater than the length d7 of each of the second type of touch electrode blocks 132 in the row 4 to the row 5 along the column direction (i.e., the negative direction of the X axis in fig. 10).
The second touch electrode blocks 1312 are located in the row 1 exactly when the positive direction of the X-axis is taken as the column direction, so the arrangement of the second touch electrode blocks 132 located in the rows around the second touch electrode blocks 1312 is similar to the arrangement of the second touch electrode blocks 132 located in the rows around the first touch electrode blocks 1311, and the description thereof is omitted here.
In view of the display panel, it is common to include scan lines 14 and data lines 15 arranged to intersect. In practical implementation, with reference to fig. 5 and 10, optionally, the row direction of the array structure is parallel to the extending direction of the scan lines 14, and the column direction of the array structure is parallel to the extending direction of the data lines 15. Alternatively, the row direction of the array structure is parallel to the extending direction of the data lines 15, and the column direction of the array structure is parallel to the extending direction of the scan lines 14.
Assuming that the row direction of the array structure is parallel to the extending direction of the scan line 14, and the column direction of the array structure is parallel to the extending direction of the data line 15, optionally, as shown in fig. 10, the first type touch electrode block 131 is disposed at least one of the 1 st row and the 1 st column, the 1 st row and the nth column, the m th row and the 1 st column, and the m th row and the nth column of the array structure. The advantage of this arrangement is that the first type touch electrode block 131 matches the rounded corner of the display panel, and the holding comfort of the device (such as a mobile phone) including the display panel is improved.
Besides, optionally, the row direction of the array structure is parallel to the extending direction of the scan line 14, and the column direction of the array structure is parallel to the extending direction of the data line 15; m is more than or equal to 3, n is more than or equal to 3; the first type of touch electrode block is positioned at least one of the row 1, the column a, the row m, the column a, the row b, the column 1 and the column n, wherein a and b are integers, a is more than 1 and less than n, and b is more than 1 and less than m.
Fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention. For example, referring to fig. 11, in the display panel, the first type touch electrode block includes three different touch electrode blocks, including a first type touch electrode block 131A, a first type touch electrode block 131B, and a first type touch electrode block 131C. The first type touch electrode block 131A is fan-shaped. Located at the four corners of the display panel. The first type touch electrode block 131B is stepped and located at the 3 rd column in the 1 st row and the 5 th column in the 1 st row, and the first type touch electrode block 131C is rectangular and located at the 4 th column in the 1 st row. The size of the first type touch electrode block 131C is much smaller than that of the second type touch electrode block 132. The arrangement can maximize the area available for image display in the display panel and improve the user experience of the display panel. Fig. 12 is a schematic structural diagram of another first-type touch electrode block according to an embodiment of the present invention. Alternatively, when the shape of the first type touch electrode block 131B is a step shape, the first type touch electrode block 131B may also be set to the shape in fig. 12.
Fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention. On the basis of the above technical solution, optionally, the display panel further includes a plurality of touch signal lines 19; each first-type touch electrode block 131 is electrically connected with at least one touch signal line 19; each second-type touch electrode block 132 is electrically connected with at least one touch signal line 19; the different touch signal lines 19 are electrically insulated from each other.
In the above technical solutions, the touch electrode block 13 (including the first type touch electrode block 131 and the second type touch electrode block 132) may be a self-capacitive touch electrode or a mutual capacitive touch electrode.
The touch position detection principle will be described in detail below by taking the touch electrode block 13 (including the first type touch electrode block 131 and the second type touch electrode block 132) as a self-capacitance type touch electrode, but the invention is not limited thereto. Referring to fig. 13, each touch electrode block 13 corresponds to a certain coordinate position, and the touch electrode blocks 13 respectively form capacitance with the ground. When a finger touches the display panel, the capacitance of the finger is superposed on the touch electrode block 13 touched by the finger, so that the capacitance to ground of the touch electrode block 13 touched by the finger changes. The change of the signal of each touch electrode block 13 reflects the change of the capacitance of the touch electrode block 13 to the ground. By detecting the signal change condition of each touch electrode block 13, it is determined which signal of the touch electrode block 13 changes, and further, the touch position of the finger can be determined according to the coordinate value corresponding to the touch electrode block 13 in which the signal changes.
The embodiment of the invention also provides a display device. Fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 14, the display device 101 includes any one of the display panels 201 provided in the embodiments of the present invention, and the display device 101 may be a mobile phone, a tablet computer, a smart wearable device, and the like.
In the display device provided by the embodiment of the invention, the length of the second type of touch electrode block located in the same row as the first type of touch electrode block along the column direction is set to be greater than the length of the second type of touch electrode block located in the adjacent row to the first type of touch electrode block along the column direction; and the ratio of the area value of the first type of touch electrode block to the area value of the second type of touch electrode block which is positioned in the same line with the first type of touch electrode block is greater than or equal to 1/2, so that the problem that the display effect of the display panel is poor due to the fact that the existing special-shaped display panel has the touch electrode blocks with two shapes is solved, and the purpose of improving the display effect of the display panel is achieved.
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 modifications, rearrangements, combinations 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 (9)

1. A display panel is characterized in that the display panel is a special-shaped display panel;
the display panel comprises at least one first-type touch electrode block and at least one second-type touch electrode block; the first type of touch electrode block and the second type of touch electrode block are different in shape, and the first type of touch electrode block is an irregular touch electrode block; the shape of the special-shaped touch electrode block is adapted to the special-shaped edge of the fillet or the groove in the display panel;
the at least one first type of touch electrode block and the at least one second type of touch electrode block are arranged together to form an array structure with m rows and n columns, wherein m and n are positive integers, m is more than or equal to 2, and n is more than or equal to 2;
the length of the second type of touch electrode block positioned in the same row with any one first type of touch electrode block along the column direction is greater than the length of the second type of touch electrode block positioned in the adjacent row with any one first type of touch electrode block along the column direction;
the ratio of the area value of any one first type of touch electrode block to the area value of the second type of touch electrode block positioned in the same row with the first type of touch electrode block is greater than or equal to 1/2;
the at least one first type of touch electrode block and the at least one second type of touch electrode block are multiplexed as a common electrode.
2. The display panel according to claim 1,
the sizes of all the second-type touch electrode blocks positioned in the same row are the same;
the length of each second type touch electrode block along the column direction in the odd-numbered rows is greater than the length of each second type touch electrode block along the column direction in the even-numbered rows.
3. The display panel according to claim 1,
the sizes of all the second-type touch electrode blocks positioned in the same row are the same;
if any one of the first type touch electrode blocks is located in the p-th row, the length of any one of the second type touch electrode blocks located in the p-th row along the column direction is greater than the length of each second type touch electrode block located in the p +1 th row to the p + q th row along the column direction, and the length of any one of the second type touch electrode blocks located in the p +1 th row to the p + q th row along the column direction is greater than the length of each second type touch electrode block located in the p + q + d th row along the column direction;
wherein p, q and d are natural numbers, p is more than or equal to 1 and less than p +1 and more than p + q + d and less than or equal to m/2, and m is more than or equal to 6.
4. The display panel according to claim 1,
the ratio of the area value of any one of the first type touch electrode blocks to the area value of the second type touch electrode block positioned in the same row with the first type touch electrode block is greater than or equal to 2/3.
5. The display panel according to claim 1,
the display panel also comprises scanning lines and data lines which are arranged in a crossed manner;
the row direction of the array structure is parallel to the extending direction of the scanning lines, and the column direction of the array structure is parallel to the extending direction of the data lines;
the at least one first-type touch electrode block is positioned at least one of the 1 st row and the 1 st column, the 1 st row and the nth column, the m th row and the 1 st column and the m th row and the nth column of the array structure.
6. The display panel according to claim 1,
the display panel also comprises scanning lines and data lines which are arranged in a crossed manner;
the row direction of the array structure is parallel to the extending direction of the scanning lines, and the column direction of the array structure is parallel to the extending direction of the data lines; m is more than or equal to 3, n is more than or equal to 3;
the at least one first-type touch electrode block is positioned at least one of the row 1, the column a, the row m, the column a, the row b, the column 1 and the column n, wherein a and b are integers, a is more than 1 and less than n, and b is more than 1 and less than m.
7. The display panel according to claim 1,
the shape of the at least one first type of touch electrode block at least comprises a fan shape and/or a step shape;
the shape of the at least one second-type touch electrode block is a polygon.
8. The display panel according to claim 1, further comprising a plurality of touch signal lines;
each first-type touch electrode block is electrically connected with at least one touch signal line;
each second-type touch electrode block is electrically connected with at least one touch signal line;
the touch signal lines are electrically insulated from each other.
9. A display device comprising the display panel according to any one of claims 1 to 8.
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