Display panel, electronic equipment and touch signal scanning method

Abstract

The invention discloses a display panel, electronic equipment and a touch signal scanning method, and belongs to the technical field of communication. The display panel comprises a first area, a second area and a third area, the first area and the second area are display areas, and the third area is located between the first area and the second area; the first area and the second area respectively comprise a plurality of touch channels extending along the first direction, the plurality of touch channels of the first area and the plurality of touch channels of the second area are in one-to-one correspondence, and the touch channels in one-to-one correspondence are parallel to each other and are not coaxial; at least part of the touch channels in the plurality of touch channels included in the first area are first target touch channels, and one end, close to the second area, of each first target touch channel is correspondingly connected with one first transmission line; the correspondingly connected first transmission lines pass through the third area and extend to the fan-out area of the display panel from the first target area in the second area.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a display panel, an electronic device and a touch signal scanning method. Background Art

[0002] Traditional touch display panels use mutual capacitance touch technology. In a weakly grounded state (such as non-charging state, use with a protective case, etc.), multiple fingers touching simultaneously in the horizontal or vertical direction are very likely to be coaxial, and the effective capacitance value of the touch at the corresponding position will be reduced, causing the touch position to shift. At this time, the touch position calculated by the device is not accurate. By changing the order (Mapping) design of the drive channels (Transmit, TX) of the upper and lower half of the screen, the touch accuracy problem caused by coaxial weak grounding can be improved. However, if the touch channel in the display panel is designed to be split screen, there will be a certain width of the wiring area in the display panel. Since the touch channel is not set in this area, both the display effect and the touch effect will be affected. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a display panel, an electronic device and a touch signal scanning method, so as to solve the problem of poor display effect and touch effect in the wiring area within the display panel.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a display panel, including:

[0006] A first area, a second area and a third area; the first area and the second area are display areas, and the third area is located between the first area and the second area;

[0007] The first area and the second area respectively include a plurality of touch channels extending along a first direction, the plurality of touch channels in the first area correspond to the plurality of touch channels in the second area one by one, and the one-to-one corresponding touch channels are parallel to each other and are not coaxial;

[0008] At least some of the multiple touch channels included in the first area are first target touch channels, and each of the first target touch channels is connected to a first transmission line at one end close to the second area. The correspondingly connected first transmission lines pass through the third area and extend from the first target area in the second area to the fan-out area of ​​the display panel. The first target area includes the area between two adjacent touch channels in the second area or the edge of the second area.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, including a housing and the above-mentioned display panel.

[0010] In a third aspect, an embodiment of the present application provides a touch signal scanning method, which is applied to the above-mentioned display panel, including:

[0011] Inputting a first scanning signal to the first drive scanning signal line in a first time period, wherein the first scanning signal is used to perform signal scanning on a touch channel in a first area of ​​the display panel, or the first scanning signal is used to scan a third target touch channel of the display panel, wherein the third target touch channel includes: touch channels in different axes in the first area and the second area;

[0012] Inputting a second scanning signal to the second drive scanning signal line in a second time period, the second scanning signal is used to perform signal scanning on a second area of ​​the display panel, or the second scanning signal is used to scan a second target channel of the display panel, the fourth target touch channel includes: touch channels on different axes in the first area and the second area, and the fourth target touch channel is different from the third target touch channel;

[0013] In a third time period, a third scan signal is simultaneously input to the first drive scan signal line and the second drive scan signal line, and the third scan signal is used to perform self-capacitive scanning on all touch channels included in the display panel.

[0014] In the embodiment of the present application, for a display panel with split-screen control of touch channels, there is a wiring area between the first area and the second area, and the first target touch channel contained in the first area is connected to a first transmission line at one end close to the second area, and the first transmission line passes through the third area and extends from between two adjacent touch channels in the second area or from the edge of the second area to the fan-out area of ​​the display panel. In this way, the width of the wiring connecting each channel in the first area can be evenly divided between each channel, which can reduce the width of the third area and reduce the touch effect and display effect problems caused by the absence of touch patterns in the third area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 is one of the schematic diagrams of a display panel according to an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of a first transmission line according to an embodiment of the present application;

[0018] Figure 3is a second schematic diagram of a display panel according to an embodiment of the present application;

[0019] Figure 4 This is one of the distance diagrams of the touch channel of the embodiment of the present application;

[0020] Figure 5 This is the second schematic diagram of the distance of the touch channel of the embodiment of the present application;

[0021] Figure 6 This is the third schematic diagram of the distance of the touch channel of the embodiment of the present application;

[0022] Figure 7 It is one of the schematic diagrams of the bridge point in the embodiment of the present application;

[0023] Figure 8 is a third schematic diagram of a display panel according to an embodiment of the present application;

[0024] Fig. 9 This is the second schematic diagram of the bridge point of the embodiment of the present application;

[0025] Fig.10 This is the third schematic diagram of the bridge point of the embodiment of the present application;

[0026] Fig.11 is a fourth schematic diagram of a display panel according to an embodiment of the present application;

[0027] Fig.12 is a fifth schematic diagram of a display panel according to an embodiment of the present application;

[0028] Fig.13 is the sixth schematic diagram of the display panel of the embodiment of the present application;

[0029] Fig.14 It is one of the schematic diagrams of the fan-out area of ​​an embodiment of the present application;

[0030] Fig.15 This is the second schematic diagram of the fan-out area of ​​the embodiment of the present application;

[0031] Fig.16 This is the third schematic diagram of the fan-out area of ​​the embodiment of the present application;

[0032] Fig.17 is a schematic diagram of a scanning signal according to an embodiment of the present application;

[0033] Fig.18 This is the fourth schematic diagram of the fan-out area of ​​the embodiment of the present application.

[0034] Figure numerals: 1. first area; 2. second area; 3. third area; 4. fan-out area; 5. flexible circuit board; 11. first transmission line; 12. first switch; 13. third switch; 21. second transmission line; 22. second switch; 23. fourth switch. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figures 1 to 18 As shown, an embodiment of the present application provides a display panel, including:

[0040] A first area 1, a second area 2 and a third area 3; the first area 1 and the second area 2 are display areas, and the third area 3 is located between the first area 1 and the second area 2;

[0041] The first area 1 and the second area 2 respectively include a plurality of touch channels extending along a first direction, the plurality of touch channels in the first area 1 correspond to the plurality of touch channels in the second area 2 one by one, and the one-to-one corresponding touch channels are parallel to each other and not coaxial;

[0042] At least some of the multiple touch channels included in the first area 1 are first target touch channels, and each of the first target touch channels is connected to a first transmission line 11 at one end close to the second area 2. The correspondingly connected first transmission lines 11 pass through the third area 3 and extend from the first target area in the second area 2 to the fan-out area 4 of the display panel. The first target area includes the area between two adjacent touch channels in the second area 2 or the edge of the second area 2.

[0043] like Figure 1 and Figure 2 As shown, the first area 1 and the second area 2 are different display areas on the display panel, for example, the first area 1 is located in the upper half of the display panel, and the second area is located in the lower half of the display panel. The display panel is a display panel in the case of split-screen control of the touch channel. Between the first area 1 and the second area 2 is the third area 3, and the third area 3 can also be understood as a routing area. The routing of the touch channel in the first area 1 extends through the third area 3 toward the direction of the second area 2.

[0044] The first area 1 and the second area 2 respectively include a plurality of touch channels extending along a first direction. The first direction is, for example, a length direction or a width direction of the display panel. The embodiment of the present application is described by assuming that the touch channels extend along the length direction of the display panel.

[0045] The touch channel may be a driving TX channel, and the channel arranged vertically with the driving channel may be a receiving (Receive, RX) channel. The TX channel and the RX channel are both completed by metal routing on the same layer. When the RX channel is laid out, it can be arranged in a cross-bridge manner because it crosses the TX channel, such as Figure 1 As shown, the bridge of the RX channel corresponds to the horizontal line position filled with pure black, which is used to connect the horizontal RX channels on the left and right sides. The bridge of the RX channel is completed by another layer of metal routing.

[0046] The touch channels of the first area 1 correspond to the touch channels of the second area 2 one by one, and the one-to-one correspondence may mean that they need to be connected together in the end, and the same driving signal is inputted therein. Figure 1As shown, for example, the first area 1 is the upper half screen area of ​​the display panel, and includes touch channels TX3, TX4, TX1, and TX2; the second area 2 is the lower half screen area of ​​the display panel, and includes touch channels TX1, TX2, TX3, and TX4.

[0047] In the first area 1, at least some of the multiple touch channels are first target touch channels, and each first target touch channel is connected to a first transmission line 11 at one end close to the second area 2. The first transmission line 11 passes through the third area 3 and extends between two adjacent touch channels in the second area 2. For example, the first target touch channel is some of the touch channels in the first area 1, such as Figure 4 TX1 and TX2 in the first area 2 are connected to a first transmission line 11 respectively, and the first transmission line 11 extends to the second area 2. The first target touch channel may also be all touch channels in the first area 1, such as Figure 1 As shown, TX3 , TX4 , TX1 , and TX2 of the first area 1 are respectively connected to a first transmission line 11 , and the first transmission line 11 extends to the second area 2 through the third area 3 .

[0048] When the first transmission line 11 extends in the second area 2, it can extend from a first target area of ​​the second area 2. The first target area can be an area between two adjacent touch channels in the second area 2, or an edge area of ​​the second area 2. Figure 1 As shown, the end of the TX3 channel of the first area 1 close to the second area 2 is connected to the first transmission line 11, and the first transmission line 11 extends from between TX1 and TX2 of the second area 2; the end of the TX4 channel close to the second area is connected to the first transmission line 11, and the first transmission line 11 extends from between TX2 and TX3 of the second area 2; the end of the TX1 channel close to the second area is connected to the first transmission line 11, and the first transmission line 11 extends from between TX3 and TX4 of the second area 2. The first transmission line 11 may also extend from the edge of the second area 2, for example Figure 1 As shown, the first transmission line 11 connected to TX2 of the first region 1 extends from the right edge of TX4 of the second region 2 .

[0049] It should be noted that the specific position where the first transmission line 11 extends in the second area is not limited, and can be as follows: Figure 1As shown, it extends toward the lower right side, and may also extend toward the lower left side, for example, the first transmission line 11 connected to TX3 of the first area 1 extends from the left edge of TX1 of the second area 2, the first transmission line 11 connected to TX4 of the first area 1 extends from between TX1 and TX2 of the second area 2, the first transmission line 11 connected to TX1 of the first area 1 extends from between TX2 and TX3 of the second area 2, and so on.

[0050] The first transmission line 11 extends from the second area 2 to the fan-out area and is connected to the IC.

[0051] In the embodiment of the present application, for a display panel with split-screen control of touch channels, there is a wiring area between the first area and the second area, and each touch channel in the first area is connected to a first transmission line at one end close to the second area, and the first transmission line passes through the third area and extends from between two adjacent touch channels in the second area or from the edge of the second area to the fan-out area of ​​the display panel. In this way, the width of the wiring connecting each channel in the first area can be evenly divided between each channel, which can reduce the width of the third area and reduce the touch effect and display effect problems caused by the absence of touch patterns in the third area.

[0052] As an optional embodiment, the first area 1 and the second area 2 are symmetrically distributed; the touch channels included in the first area 1 have a first distance in the horizontal direction from the corresponding touch channels in the second area 2; the corresponding touch channels are a group of touch channels, and the first distances contained in different groups of touch channels are the same.

[0053] In this embodiment, the first area 1 and the second area 2 may be symmetrically distributed, the areas of the first area 1 and the second area 2 are the same, and the number of touch channels contained in the first area 1 and the second area 2 is the same. It should be noted that the symmetrical distribution here may be diagonally symmetrical (for example, symmetrical relative to a certain point), left-right symmetrical, or top-bottom symmetrical (for example, symmetrical relative to a certain line), and is not limited here. The first area 1 and the second area 2 may be part or all of the display area in the display panel, and the part or all of the display area is, for example, an area where touch channel sub-region control is required, then the first area 1 and the second area 2 are symmetrically distributed in the area where touch channel sub-region control is required.

[0054] For example: the number of touch channels in the display panel is odd, for example, it includes 11 TX channels. In order to facilitate regional control, 10 TX channels can be controlled in different regions (the TX channel at the edge is not divided). Then the first region 1 and the second region 2 are the regions where the 10 TX channels are located (referred to as region A here), and the first region 1 and the second region 2 are symmetrically distributed in the region A, for example, symmetrically relative to the center of region A and symmetrically relative to the central axis of region A.

[0055] The touch channels included in the first area 1 and the second area 2 correspond to each other one by one, and the one-to-one corresponding touch channels are not coaxial. For example, the first area 1 includes TX1, TX2, TX3 and TX4, and the second area 2 also includes TX1, TX2, TX3 and TX4. In order to ensure that the one-to-one corresponding touch channels are not coaxial, the touch channels in the first area 1 and the second area 2 are arranged differently. For example Figure 1 As shown, the arrangement of the touch channels in the first area 1 is: TX3, TX4, TX1, TX2, and the arrangement of the touch channels in the second area 2 is: TX1, TX2, TX3, TX4. The touch channels in the first area 1 have a first distance in the horizontal direction from the corresponding touch channels in the second area 2, and the first distances between each group of corresponding touch channels are the same.

[0056] For example Figure 1 As shown, taking 4 TX channels and 6 RX channels as an example, since there are few coaxial scenes in the short side direction of the display panel, the TX channels extending along the length direction of the display panel are divided, and the display panel is evenly divided into two upper and lower areas by the center line, and the blank area between the two areas is the third area 3. The distance between TX3 in the first area 1 and TX3 in the second area 2 is d1, the distance between TX3 in the first area 1 and TX3 in the second area 2 is d2, the distance between TX1 in the first area 1 and TX1 in the second area 2 is d3, and the distance between TX2 in the first area 1 and TX2 in the second area 2 is d4, d1=d2=d3=d4. The TX distribution law finally formed satisfies that the distances of the corresponding TX channels in each area in the horizontal direction are completely consistent. In this way, the required routing area width of the first transmission line of the touch channel of the first area 1 can be evenly distributed between each channel, reducing the width of the third area 3, thereby improving the touch effect problem caused by the absence of touch pattern in this part of the area.

[0057] Optionally, the first area 1 may include at least two sub-areas, and the second area 2 may include at least two sub-areas, wherein the touch channels included in the diagonally distributed sub-areas of the first area 1 and the touch channels included in the sub-areas of the second area 2 are a group of touch channels. For example: the first area 1 is the upper half of the display panel, the second area 2 is the lower half of the display panel, the first area 1 includes two left and right sub-areas divided by the center line of the length direction of the display panel, and the second area 2 includes two left and right sub-areas divided by the center line of the length direction of the display panel, then the touch channels included in the two diagonally distributed sub-areas are a group, for example Figure 1 As shown, the touch channels in the upper left area and the lower right area of ​​the display panel are a group, both including TX3 and TX4; the touch channels in the upper right area and the lower left area of ​​the display panel are a group, both including TX1 and TX2.

[0058] Among them, the arrangement and distribution of TX is designed according to the following logic: the horizontal distances between TX1 and TX2 with touch patterns in the sub-area (lower left area) of the second area 2 and TX1 and TX2 with touch patterns in the sub-area (upper right area) of the first area 1 are kept consistent in pairs: that is, the horizontal distance dx between TX1 in the second area and TX1 in the first area is equal to the horizontal distance dy between TX2 in the second area and TX2 in the first area. Similarly, the horizontal distances between TX3 and TX4 with touch patterns in the sub-area (lower right area) of the second area and TX3 and TX4 with touch patterns in the sub-area (upper left area) of the first area 1 are kept consistent in pairs: that is, the horizontal distance di between TX3 in the second area and TX3 in the first area is equal to the horizontal distance dj between TX4 in the second area and TX4 in the first area.

[0059] The TX distribution law finally formed satisfies that the distances in the horizontal direction of the corresponding TX channels in each area symmetrical about the center are completely consistent.

[0060] As an optional embodiment, Figure 3 As shown, at least some of the multiple touch channels included in the second area 2 are second target touch channels, and each of the second target touch channels is connected to a second transmission line 21 at one end close to the first area 1, and each correspondingly connected second transmission line 21 passes through the third area 3 and extends from the second target area in the first area 1 to the edge of the display panel; the second target area includes: between two adjacent touch channels in the first area 1 or the edge of the first area 1.

[0061] In this embodiment, in the second area 2, at least some of the multiple touch channels are second target touch channels, and each second target touch channel is connected to the second transmission line 21 at one end close to the first area 1. The second transmission line 21 extends in the direction of the first area 1, passes through the third area 3, and extends from between two adjacent touch channels in the first area 1 or from the edge of the first area 1 to the edge of the display panel.

[0062] For example Figure 4 As shown, TX1 and TX2 in the second area 2 are the second target touch channels, and TX1 and TX2 in the second area 2 are respectively connected to a second transmission line 21, which extends to the first area 1 through the third area 3 and extends between adjacent touch channels of the first area 1 or from the edge of the touch channel.

[0063] The second target touch channel may also be all the touch channels of the second area 2, for example Figure 3 As shown, in the second area 2, one end of the TX1 channel close to the first area is connected to the second transmission line 21, and the second transmission line 21 extends from the left edge of TX3 in the first area 1; one end of the TX2 channel close to the first area is connected to the second transmission line 21, and the second transmission line 21 extends from between TX3 and TX4 in the first area 1; one end of the TX3 channel close to the first area is connected to the second transmission line 21, and the second transmission line 21 extends from between TX4 and TX1 in the first area 1; one end of the TX4 channel close to the first area is connected to the second transmission line 21, and the second transmission line 21 extends from between TX1 and TX2 in the first area 1.

[0064] Through this design, Figure 4 and Figure 5 As shown, the first transmission line 11 connected to the first target touch channel of the first area 1 extends through the third area 3 and the second area 2, and the second transmission line 21 connected to the touch channel of the second area 2 extends through the third area 3 and the first area 1, which can better match the mutual capacitance of the first area 1 and the second area 2. In this way, the routing width of the third area 3 can be evenly distributed between each channel, improving and reducing the touch effect and display effect problems caused by the non-touch pattern.

[0065] The width of the TX line after averaging is reduced from mm level to um level, which has little impact on the touch performance. In addition, due to the reduction of the line width, the display risk caused by inconsistent pattern fracture is also further reduced.

[0066] It should be noted that for Figure 1 and Figure 2 The display panel shown is compared to Figure 3, mutual inductance and capacitance matching is not performed for the TX channel, that is, the second transmission line is not set. In this way, there are fewer intersections between the RX channel and the TX channel and the transmission line, so the number of bridge points required for the RX channel is reduced, and the resistance R will also be improved to a certain extent. Since the second area 2 is closer to the IC in the fan-out area, the RC (resistance R, capacitance C) load is smaller, and the first area 1 is farther from the IC in the deletion area, the RC Loading is larger, and the second transmission line does not need to be set. In this way, the first transmission line of the touch channel of the first area is set in the second area, which can balance the RC Loading of the first area and the second area, which is beneficial to the data processing of the IC.

[0067] For example Figure 4 and Figure 6 As shown, the lower left side is a sub-area of ​​the second area, and the upper right side is a sub-area of ​​the first area. Assuming that TX1 and TX2 of the sub-areas of the second area are defined as group 1, and TX1 and TX2 of the sub-areas of the first area are defined as group 2, the positions of the areas where group 1 and group 2 are located are symmetrical about the center of the entire display area. In the horizontal direction, the distance between the same TXs is d_TX1=d_TX2. For example Figure 5 As shown, assuming that the upper left side is a sub-area of ​​the first area, the lower right side is a sub-area of ​​the second area, and the distance between the same TXs d_TX3=d_TX4. For the above settings, when the user touches the display panel with multiple fingers, for example, one finger touches point A and the other finger touches point Figure 6 The B, C, and C' positions shown will not cause coaxial multi-finger touches. This design ensures that the distances of all touch channels are consistent, so that the touch effect of the entire display panel is equivalent. Assuming that the number of TX channels is greater than 18, the d_TX distance is basically more than 8 times the distance between adjacent TX channels. This design makes it less likely for the display panel with split-screen control to have coaxial multi-finger touches, and it is less likely to have a weak grounding effect. The physical coordinates of the touch are more closely matched to the coordinates calculated by the software, which can improve the touch accuracy.

[0068] Optionally, a virtual transmission line is provided at a first edge of the first area 1, and the first edge is an edge that the second transmission line does not pass through; a virtual transmission line is provided at a second edge of the second area 2, and the second edge is an edge that the first transmission line does not pass through; and the virtual transmission line has no electrical connection.

[0069] In this embodiment, the virtual transmission line is Figure 3 The Dummy lines shown, in addition to the conventional TX channel, RX channel, and bridge, are additionally designed on the left and right sides of the first area and the second area, and have no actual electrical function.

[0070] like Figure 7and Figure 8 As shown, Figure 8 yes Figure 7 A cross-sectional view of the bridge position A-A' in the display touch panel. For the entire display touch panel, the vertical TX channel (vertical fill pattern) and the horizontal RX channel (horizontal fill pattern) are designed in the second touch metal layer (Touch Metal2, TM2). Similarly, TM1 refers to the first touch metal layer. All vertical TX channels are designed with TM2, so TX can be Figure 3 The RX channel in the horizontal direction is electrically connected from the top to the bottom. Figure 3 Extending from the far left to the far right, the area where the TX is encountered adopts a cross-bridge method ( Figure 7 The black fill design in the figure) crosses the TX line to achieve electrical conduction on the left and right sides.

[0071] The cross-bridge design will increase the on-resistance of the RX channel and significantly increase the mutual capacitance Cm between TX / RX, which is a key parameter in the design of display touch panels. There is a break between TX and RX and there is a height difference between TX and RX at the break, which affects the R / G / B light output and is related to the wide viewing angle visual effect.

[0072] refer to Fig. 9 , assuming that the first area and the second area are symmetrical about the central axis of the display panel, the corresponding pattern unit is also divided into the upper and lower half screens. Fig. 9 After the touch channel is designed based on the repeated unit array of the upper and lower half screens of the display panel, it can be seen from the visual effect perspective (i.e., the pattern fracture) that there is a difference between the pattern on the rightmost side of the upper half screen and the rightmost side of the lower half screen. Similarly, the pattern on the leftmost side of the upper half screen and the leftmost side of the lower half screen are also different, and the patterns in other positions are completely consistent. In this embodiment, a virtual transmission line, i.e., a Dummy trace, is added to the edge where no transmission line is set. This trace does not have the TX coding function. Adding Dummy TX to the edges on the left and right sides where no transmission line is set, in addition to visual considerations, is also conducive to better consistency of RX impedance. For example: if you just increase Fig. 9 If there is a Dummy TX at the upper right edge and no Dummy TX at the lower left edge, the TX impedance of the upper half of the screen will be different from the TX impedance of the lower half of the screen due to the different number of bridge points, resulting in poor impedance uniformity, which ultimately affects the consistency of the touch effect. Therefore, by setting a virtual transmission line, this embodiment can make the number of bridge points of the RX channels of the first area and the second area consistent, ensure impedance consistency, and avoid affecting the touch effect.

[0073] The design position of the virtual transmission line is related to the routing direction of the transmission line in the first area and the second area. Fig. 9The first area and the second area in the display panel are interchanged, that is, the first area is the lower half of the display panel, and the second area is the upper half of the display panel. Then the position of the virtual transmission line is given by Fig. 9 The upper right and lower left sides shown are changed to upper left and lower right sides, e.g. Fig.10 shown.

[0074] like Fig. 9 and Fig.10 As shown, each transmission line is located between two adjacent TX channels. The routing space generally occupies a very small pattern width, generally at the um level, and has very little impact on touch.

[0075] Optionally, each of the first target regions includes a first transmission line 11, or each of the first target regions includes a plurality of first transmission lines 11. Each of the second target regions includes a second transmission line 21, or each of the second target regions includes a plurality of second transmission lines 21.

[0076] In this embodiment, one or more transmission lines may be arranged between two adjacent touch channels or at the edge of a touch channel. Figure 3 As shown, between TX1 and TX2 in the first area 1, there is the second transmission line 21 of TX4 in the second area 2; between TX1 and TX4 in the first area 1, there is the second transmission line 21 of TX3 in the second area 2; between TX4 and TX3 in the first area 1, there is the second transmission line 21 of TX2 in the second area 2; at the left edge of TX3 in the first area 1, there is the second transmission line 21 of TX1 in the second area 2.

[0077] Between TX1 and TX2 in the second area 2 is the first transmission line 11 of TX3 in the first area 1; between TX2 and TX3 in the second area 2 is the first transmission line 11 of TX4 in the first area 1; between TX3 and TX4 in the second area 2 is the first transmission line 11 of TX1 in the first area 1; and at the right edge of TX4 in the second area 2 is the first transmission line 11 of TX2 in the first area 1. This ensures that only one transmission line passes between each transmission channel, avoiding interference between multiple transmission lines, and avoiding the increase in the width of the routing area caused by the overlap of multiple transmission lines.

[0078] Optionally, the extension directions of the plurality of first transmission lines 11 are consistent; the extension directions of the plurality of second transmission lines 21 are consistent. The extension direction refers to the direction in which the transmission line extends to the left or right, for example Figure 3As shown, the first transmission lines 11 connected to TX3, TX4, TX1, and TX2 of the first area 1 all extend from the right position to the second area; the second transmission lines 21 connected to TX1, TX2, TX3, and TX4 of the second area 2 all extend from the left position to the first area. Since the alignment of the display panel is more consistent, the problem of poor visual effect at a wide viewing angle can also be better improved.

[0079] In this embodiment, the touch channel of the second area 2 is connected to the second transmission line 21 extending to the first area 1, so that the RC loading of the first area and the second area can be balanced. The following describes the situation of achieving loading consistency in this solution.

[0080] like Fig.11 As shown, the first area 1 is the upper half of the display panel, and the second area 2 is the lower half of the display panel, wherein the first transmission line 11 connected to the TX1 channel on the right side of the first area 1 passes through RX4~RX6, which is a 3-section mutual inductance capacitor. The second transmission line 21 connected to the TX1 channel on the left side of the second area 2 passes through RX1~RX3, a total of 3 sections of mutual inductance capacitors. The mutual inductance capacitance of the TX channels on the left and right sides is consistent, and the first area and the second area simultaneously add bridge points to each RX channel, which balances the mutual inductance capacitance while ensuring the consistency of the resistance R of all RX channels, further ensuring the uniformity of the touch effect. Other TX channel design schemes are similar and will not be repeated here.

[0081] It should be noted that the virtual transmission line Fig.11 Not shown in Fig.11 Virtual transmission lines are provided at the upper right edge and the lower left edge as shown. The virtual transmission lines can be connected to the ground signal (GND), which can further improve the mutual capacitance increase problem caused by the coupling between the RX wire (Trace) in the frame area of ​​the electronic device and the touch area in the display panel.

[0082] In addition, the embodiment of the present application is described for the case where the number of TX channels is an even number. If the TX channel is an odd number, it can be combined with actual user scenarios. It is not easy for two fingers to touch the outermost edge at the same time. Even because the edge has an arc edge, there are fewer usage scenarios. Therefore, the first or last TX channel may not be designed for area design, and other areas may be designed according to the touch channel layout of the embodiment of the present application. In this case, the display area where the first area and the second area are located refers to the display area excluding the first or last TX channel, and the first area and the second area are still symmetrically distributed.

[0083] As an optional embodiment, the second transmission line 21 extends to a third edge of the display panel and is connected to a corresponding touch channel in the first area 1 at the third edge; the third edge is perpendicular to the first edge and the second edge.

[0084] In this embodiment, after the second transmission line 21 extends to the edge of the display panel, it is connected to the corresponding touch channel at the edge. The edge is perpendicular to the edge where the Dummy line is set. Fig.12 As shown, the third edge may be an upper edge of the display panel.

[0085] like Fig.12 As shown, the first area 1 is above the third area 3 of the display panel, and the second area 2 is below the third area 3, wherein the first transmission line 11 connected to the touch channel in the first area 1 extends to the fan-out area 4, and the second transmission line 21 connected to the touch channel in the second area 2 extends to the upper edge of the display panel, at the upper edge of the display panel, the second transmission line 21 connected to the touch channel TX1 of the second area 2 is connected to TX1 of the first area 1; the second transmission line 21 connected to the touch channel TX2 of the second area 2 is connected to TX2 of the first area 1; the second transmission line 21 connected to the touch channel TX3 of the second area 2 is connected to TX3 of the first area 1; the second transmission line 21 connected to the touch channel TX4 of the second area 2 is connected to TX4 of the first area 1.

[0086] like Fig.12 As shown, at the upper edge of the display panel, the second transmission lines corresponding to the touch channels of the lower half of the display panel are connected to the touch channels of the upper half of the screen in pairs. Under this connection mode, the transmission lines overlap each other the same number of times in this edge area, which can ensure the best uniformity of RC Loading. For example, the second transmission line 21 of TX1 in the second area 2 overlaps with the second transmission lines 21 of TX2 and TX4, the second transmission line 21 of TX2 overlaps with the second transmission lines 21 of TX1 and TX3, the second transmission line 21 of TX3 overlaps with the second transmission lines 21 of TX2 and TX4, and the second transmission line 21 of TX4 overlaps with the second transmission lines 21 of TX1 and TX3. All TX channels are grounded the same number of times and there is no redundant overlap.

[0087] Since the first transmission line 11 extends to the fan-out region 4 of the display panel, the fan-out region 4 is located Fig.12 By connecting the second transmission line 21 corresponding to the touch channel of the second area 2 to the touch channel of the first area 1 at the upper edge of the display panel, the RC loading uniformity can be optimized.

[0088] As an optional embodiment, the fan-out region includes a plurality of metal connection terminals;

[0089] The first transmission line and the corresponding touch channel in the second area 2 are connected to the same metal connection end;

[0090] or,

[0091] The first transmission line and the corresponding touch channel in the second area 2 are connected to different metal connection terminals.

[0092] In this embodiment, in addition to the touch area of ​​the display panel, it also includes a fan-out area (Panel Fanout) 4 and a flexible printed circuit board 5 (Flexible Printed Circuit, FPC), such as Fig.13 As shown. Since the size of the fan-out area is not limited or is less limited, the first transmission line 11 and the touch channel of the second area 2 are connected in the fan-out area 4. The fan-out area 4 includes a plurality of metal connection terminals. Fig.14 As shown, the first transmission line 11 and the corresponding touch channel in the second area 2 are connected to the same metal connection end, for example, the first transmission line of TX1 in the first area 1 and TX1 in the second area 2 are connected to the same metal connection end, the first transmission line of TX2 in the first area 1 and TX2 in the second area 2 are connected to the same metal connection end, and so on. This design method can reduce the setting of metal connection ends and save internal space of electronic equipment.

[0093] Alternatively, the first transmission line 11 may also be connected to a different metal connection end with the corresponding touch channel in the second area 2, for example Fig.15 As shown, the first transmission line 11 of TX1 in the first area 1 and TX1 in the second area 2 are connected to different metal connection terminals respectively, and the first transmission line 11 of TX2 in the first area 1 and TX2 in the second area 2 are connected to different metal connection terminals respectively. The fan-out area design of this method is simple and does not require similar Fig.14 Use different metal layers for routing in the fan-out area.

[0094] Optionally, the metal connection end is connected to the flexible circuit board 5; when the first transmission line 11 and the corresponding touch channel in the second area 2 are connected to different metal connection ends, the metal connection end connected to the first transmission line 11 and the metal connection end connected to the corresponding touch channel in the second area 2 are connected to the flexible circuit board 5.

[0095] In this embodiment, the first transmission line 11 and the corresponding touch channels in the second area are respectively connected to different metal connection ends in the fan-out area 4. In order to ensure the touch consistency of the corresponding channels, the corresponding touch channels need to be connected together on the FPC and finally enter the touch chip.

[0096] As an optional embodiment, Fig.16 As shown, the corresponding touch channels in the first area 1 and the second area 2 form a group of touch channels;

[0097] In the first group of touch channels, the first transmission line is connected to the first end of the first switch 12 in the fan-out region, and the second end of the first switch 12 is connected to the first drive scan signal line;

[0098] The touch channel of the second area 2 is connected to the first end of the second switch 22 in the fan-out area, and the second end of the second switch 22 is connected to the second drive scan signal line;

[0099] The first end of the first switch 12 and the first end of the second switch 22 are connected to the same metal connection terminal in the fan-out region.

[0100] In this embodiment, if Fig.16 As shown, the corresponding touch channels in the first area 1 and the second area 2 are, for example: TX1' in the first area and TX1 in the second area; TX2' in the first area and TX2 in the second area; TX3' in the first area and TX3 in the second area; TX4' in the first area and TX4 in the second area. Fig.16 Taking the simultaneous setting of the first transmission line 11 and the second transmission line 21 as an example, the first transmission line 11 extends from the second area 2 to the fan-out area 4, and the first transmission line 11 and the corresponding touch channels in the second area are respectively connected to switches and connected to the metal connection ends of the fan-out area 4 through the switches.

[0101] The switch may be a thin film transistor (TFT), which has good on / off characteristics to scan the corresponding channels in different time periods. Fig.16 As shown, TX1 of the second region 2 and the second switch 22 ( Fig.16 The other end of the second switch 22 is connected to the second drive scanning signal line T0; the first transmission line TX1' of the first area is connected to the first switch 12 ( Fig.16 The first switch 12 is connected to one end of the first switch 12 (TFT), and the other end of the first switch 12 is connected to the first drive scanning signal line T1. In addition, the first switch 12 and the second switch 22 are connected to the same metal connection end.

[0102] It should be noted that, in this embodiment, each touch channel in the second area can be connected to the same drive scan signal line, namely, the second drive scan signal line; and the first transmission lines of each touch channel in the first area can be connected to the same drive scan signal line, namely, the first drive scan signal line. Fig.16As shown, TX1, TX2, TX3, and TX4 in the second area are all connected to T0, and TX1', TX2', TX3', and TX4' in the first area are all connected to T1. Since the touch channels in the first area and the second area are connected to different drive scanning signal lines, the display panel will be divided into upper and lower areas for scanning.

[0103] When performing a drive scan, you can scan in different time periods, such as Fig.17 As shown, the touch drive scan is divided into three main time periods, time period ① is the upper half screen TX channel (touch channel of the first area 1), time period ② is the lower half screen TX channel (touch channel of the second area 2), and time period ③ is the full screen TX channel scan. Among them, time periods ① and ② are mutual capacitance scanning signals, and time period ③ is self-capacitance scanning signals. In the mutual capacitance scanning time period, T0 and T1 are turned on and off respectively, thereby driving the touch channels of the first area and the second area respectively. For example, T0 is turned on and T1 is turned off to drive TX1, TX2, TX3, and TX4 in the second area to scan; T0 is turned off and T1 is turned on, then TX1', TX2', TX3', and TX4' in the first area are driven to scan. When performing self-capacitance scanning in time period ③, T0 and T1 can be turned on at the same time to save scanning time. Fig.17 The timing diagram only illustrates the driving of TX(1). The driving methods of other channels such as TX(2), TX(3), TX(4) are similar and will not be described in detail.

[0104] As an optional embodiment, Fig.18 As shown, in the second group of touch channels, the first transmission line 11 is connected to the first end of the third switch 13 in the fan-out region, and the second end of the third switch 13 is connected to the second drive scan signal line;

[0105] The touch channel of the second area 2 is connected to a first end of a fourth switch 23 in the fan-out area, and a second end of the fourth switch 23 is connected to a first drive scan signal line;

[0106] The first end of the third switch 13 and the first end of the fourth switch 23 are connected to the same metal connection end in the fan-out region; the second group of touch channels is adjacent to the first group of touch channels.

[0107] In this embodiment, the corresponding touch channels are grouped as one, and the display panel includes multiple groups of touch channels, such as Fig.18 TX1 and TX1', TX2 and TX2', TX3 and TX3', TX4 and TX4'. Fig.16 In the embodiment, the touch channels in the same area are connected to the same drive scanning signal lines. Fig.18 In the embodiment of FIG. 1 , the touch channels in the same area are connected to two drive scanning signal lines in an interlaced manner. Fig.18 As shown, the first transmission lines of TX1 of the second area 2 and TX1' of the first area are still connected to T0 and T1 respectively; however, the first transmission lines of TX2 of the second area 2 and TX2' of the first area are connected to T1 and T0; the first transmission lines of TX3 of the second area 2 and TX3' of the first area are still connected to T0 and T1 respectively; however, the first transmission lines of TX4 of the second area 2 and TX4' of the first area are connected to T1 and T0. That is, the connection of the touch channels of the two adjacent groups is opposite to that of the drive scanning signal lines. In this embodiment, when the display panel is scanned in time periods, there is no need to wait until a certain area is completely scanned before scanning another area. For example, when T0 is turned on, TX1, TX3 of the second area and TX2', TX4' of the first area can be scanned at the same time; when T1 is turned on, TX2, TX4 of the second area and TX1', TX3' of the first area can be scanned at the same time. The synchronous scanning of two areas of the display panel in the same time period is realized, which can improve the smoothness of full-screen multi-finger touch. The timing control and Fig.17 Similar, I will not go into details here.

[0108] In this embodiment, the touch channel is connected to the metal connection end of the fan-out area 4 through a switch, and the switch is designed in the fan-out area 4 without adding additional process costs. Optionally, the circuit parts such as the switch and the metal connection end can also be integrated into the touch chip, which is not limited here.

[0109] It should be noted that the scanning method of the embodiment of the present application is not limited to the above Fig.16 and Fig.18 As shown, it is sufficient to ensure that the touch channels in the same column are not scanned at the same time during scanning, and the details will not be repeated.

[0110] In the embodiment of the present application, for a display panel with split-screen control of touch channels, there is a wiring area between the first area and the second area, and each touch channel in the first area is connected to a first transmission line extending in the first direction at one end close to the second area, and the first transmission line passes through the third area and extends from between two adjacent touch channels in the second area or from the edge of the second area to the fan-out area of ​​the display panel. In this way, the width of the wiring connecting each channel in the first area can be evenly divided between each channel, which can reduce the width of the third area and reduce the touch effect and display effect problems caused by the absence of touch patterns in the third area.

[0111] The embodiment of the present application further provides a touch signal scanning method, which is applied to the above-mentioned display panel, comprising:

[0112] Inputting a first scanning signal to the first drive scanning signal line in a first time period, wherein the first scanning signal is used to perform signal scanning on a touch channel in a first area of ​​the display panel, or the first scanning signal is used to scan a third target touch channel of the display panel, wherein the third target touch channel includes: touch channels in different axes in the first area and the second area;

[0113] Inputting a second scanning signal to the second drive scanning signal line in a second time period, the second scanning signal being used to perform signal scanning on a second area of ​​the display panel, or the second scanning signal being used to scan a fourth target channel of the display panel, the fourth target touch channel comprising: touch channels on different axes in the first area and the second area, the fourth target touch channel being different from the third target touch channel;

[0114] In a third time period, a third scan signal is simultaneously input to the first drive scan signal line and the second drive scan signal line, and the third scan signal is used to perform self-capacitive scanning on all touch channels included in the display panel.

[0115] In this embodiment, when the drive scan is performed, the scan can be performed in time periods. The touch drive scan is divided into three main time periods. The first time period is the upper half screen TX channel of the display panel (the touch channel of the first area 1), the first time period is the lower half screen TX channel (the touch channel of the second area 2), and the third is the full screen TX channel scan. The first time period and the second time period are mutual capacitance scan signals, and the third time period is self capacitance scan signals.

[0116] For example Fig.16 As shown, it is assumed that T1 is turned on in the first time period, that is, the first scanning signal is input to TX1', TX2', TX3', TX4' of the first area to scan the upper half of the display panel; T0 is turned on in the second time period, that is, the second scanning signal is input to TX1, TX2, TX3, TX4 of the second area to scan the lower half of the display panel. Or, Fig.18 As shown, assuming that T1 is turned on in the first time period, and the first scanning signal is input to TX1', TX3' of the first area and TX2, TX4 of the second area, so as to realize simultaneous scanning of TX1', TX3', TX2, TX4 of the display panel; assuming that T0 is turned on in the second time period, and the second scanning signal is input to TX2', TX4' of the first area and TX1, TX3 of the second area, so as to realize simultaneous scanning of TX2', TX4', TX1, TX3 of the display panel.

[0117] During the third time period, the self-capacitance scan is performed, and the two drive scan signal lines can be turned on at the same time to scan all the touch channels, so as to save the scan time.

[0118] The present application also provides an electronic device, including a housing and the above-mentioned display panel. Other components of the electronic device of the present application, such as the housing, and operations are known to those skilled in the art and will not be described in detail here.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0120] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0121] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

Claims

1. A display panel, characterized in that: include: A first area, a second area and a third area; the first area and the second area are display areas, and the third area is located between the first area and the second area; The first area and the second area respectively include a plurality of touch channels extending along a first direction, the plurality of touch channels in the first area correspond to the plurality of touch channels in the second area one by one, and the one-to-one corresponding touch channels are parallel to each other and are not coaxial; At least some of the multiple touch channels included in the first area are first target touch channels, and each of the first target touch channels is connected to a first transmission line at one end close to the second area. The correspondingly connected first transmission lines pass through the third area and extend from the first target area in the second area to the fan-out area of ​​the display panel. The first target area includes the area between two adjacent touch channels in the second area or the edge of the second area.

2. The display panel according to claim 1, characterized in that: The first area and the second area are symmetrically distributed; A first distance exists between the touch channel included in the first area and the corresponding touch channel in the second area in the horizontal direction; The corresponding touch channels form a group of touch channels, and the first distances included in different groups of touch channels are the same.

3. The display panel according to claim 1, characterized in that: At least some of the multiple touch channels included in the second area are second target touch channels, and one end of each of the second target touch channels close to the first area is respectively connected to a second transmission line, and each correspondingly connected second transmission line passes through the third area and extends from the second target area in the first area to the edge of the display panel; The second target area includes: the area between two adjacent touch channels in the first area or the edge of the first area.

4. The display panel according to claim 3, characterized in that: A virtual transmission line is disposed at a first edge of the first area, and the first edge is an edge that the second transmission line does not pass through; A virtual transmission line is disposed at a second edge of the second area, and the second edge is an edge that the first transmission line does not pass through; The virtual transmission line has no electrical connection.

5. The display panel according to claim 4, characterized in that: The second transmission line extends to a third edge of the display panel and is connected to a corresponding touch channel in the first area at the third edge; the third edge is perpendicular to the first edge and the second edge.

6. The display panel according to claim 1, characterized in that: The fan-out region includes a plurality of metal connection terminals; The first transmission line and the corresponding touch channel in the second area are connected to the same metal connection terminal; or, The first transmission line and the corresponding touch channel in the second area are connected to different metal connection ends.

7. The display panel according to claim 6, characterized in that: The metal connection end is connected to the flexible circuit board; When the first transmission line and the corresponding touch channel in the second area are connected to different metal connection ends, the metal connection end connected to the first transmission line and the metal connection end connected to the corresponding touch channel in the second area are connected to the flexible printed circuit board.

8. The display panel according to claim 1 or 3, characterized in that: The corresponding touch channels in the first area and the second area form a group of touch channels; In the first group of touch channels, the first transmission line is connected to a first end of a first switch in the fan-out region, and a second end of the first switch is connected to a first drive scan signal line; The touch channel of the second area is connected to the first end of the second switch in the fan-out area, and the second end of the second switch is connected to the second drive scan signal line; A first terminal of the first switch and a first terminal of the second switch are connected to the same metal connection terminal in the fan-out region.

9. The display panel according to claim 8, characterized in that: In the second group of touch channels, the first transmission line is connected to a first end of a third switch in the fan-out region, and a second end of the third switch is connected to a second drive scan signal line; The touch channel of the second area is connected to the first end of the fourth switch in the fan-out area, and the second end of the fourth switch is connected to the first drive scan signal line; The first end of the third switch and the first end of the fourth switch are connected to the same metal connection end in the fan-out region; The second group of touch channels is adjacent to the first group of touch channels.

10. An electronic device, characterized in that: The invention comprises a housing and the display panel according to any one of claims 1 to 9, wherein the display panel is fixed to the housing.

11. A touch signal scanning method, characterized in that: The display panel according to any one of claims 1 to 9 comprises: Inputting a first scanning signal to the first drive scanning signal line in a first time period, wherein the first scanning signal is used to perform signal scanning on a touch channel in a first area of ​​the display panel, or the first scanning signal is used to scan a third target touch channel of the display panel, wherein the third target touch channel includes: touch channels in different axes in the first area and the second area; Inputting a second scanning signal to the second drive scanning signal line in a second time period, the second scanning signal being used to perform signal scanning on a second area of ​​the display panel, or the second scanning signal being used to scan a fourth target channel of the display panel, the fourth target touch channel comprising: touch channels on different axes in the first area and the second area, the fourth target touch channel being different from the third target touch channel; In a third time period, a third scan signal is simultaneously input to the first drive scan signal line and the second drive scan signal line, and the third scan signal is used to perform self-capacitive scanning on all touch channels included in the display panel.

Images