CN106249960B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN106249960B CN106249960B CN201610683494.7A CN201610683494A CN106249960B CN 106249960 B CN106249960 B CN 106249960B CN 201610683494 A CN201610683494 A CN 201610683494A CN 106249960 B CN106249960 B CN 106249960B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The application discloses touch-control display panel and touch-control display device, this touch-control display panel includes: a touch sensing electrode strip including a plurality of touch sensing electrode blocks disposed on the first substrate; the first sub-touch sensing trace and the second sub-touch sensing trace are electrically connected at one end point of the second sub-touch sensing trace; each touch sensing electrode block is electrically connected with the first sub-touch sensing wiring at least one connecting point; the sum of the resistance of each touch sensing electrode block and the effective resistance of the touch sensing wire electrically connected with the touch sensing electrode block is a certain value. The sum of the resistance of each touch sensing electrode block in the touch display panel and the effective resistance in the touch sensing wire electrically connected with the touch sensing electrode block is a certain value, so that the touch sensing uniformity of the touch display panel is improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a touch display panel and a touch display device including the touch display panel.
Background
With the rapid development of display technology, touch display technology has gradually spread throughout the lives of people. In the existing touch display panel, compared with the resistive touch display panel, the capacitive touch display panel has the advantages of long service life, high light transmittance, capability of supporting multi-point touch, and the like, and becomes a hot spot of the touch display technology.
The touch detection principle of the capacitive touch display panel is as follows: touch driving electrodes and touch sensing electrodes which are distributed in a transverse and longitudinal crossed mode are formed in the touch display panel, a capacitance matrix is formed at the crossed position, then a driving chip applies touch detection signals to the touch driving electrodes respectively, and sequentially detects touch sensing signals output by the touch sensing electrodes corresponding to the touch driving electrodes, so that capacitance change in the capacitance matrix is detected, and a touch position is judged.
Generally, the lengths of the touch sensing traces in the touch display panel are different due to different distribution positions of the touch sensing electrodes, so that the resistances of the touch sensing traces are different, and the sum of the resistance of each touch sensing electrode and the resistance of the touch sensing trace electrically connected to the touch sensing electrode is different. When the touch sensing electrode outputs the touch sensing signal through the touch sensing trace electrically connected with the touch sensing electrode, different touch sensing traces output the touch sensing signal with different time delay conditions, so that the touch sensitivity uniformity of the touch display panel is poor.
Disclosure of Invention
In view of the foregoing defects in the prior art, embodiments of the present application provide a touch display panel and a touch display device including the touch display panel to solve the technical problems mentioned in the above background.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a touch display panel, including a first substrate; a plurality of touch sensing electrode strips disposed on the first substrate, each touch sensing electrode strip extending along a first direction and being arranged along a second direction, wherein the first direction and the second direction are crossed, and each touch sensing electrode strip includes a plurality of touch sensing electrode blocks; a plurality of touch sensing traces disposed on the first substrate, the touch sensing traces including a first sub-touch sensing trace parallel to the first direction and a second sub-touch sensing trace parallel to the second direction, the first sub-touch sensing trace and the second sub-touch sensing trace being electrically connected at an end of the second sub-touch sensing trace; each touch sensing electrode block is electrically connected with the first sub-touch sensing routing at least one connecting point respectively; the sum of the resistance of each touch sensing electrode block and the effective resistance of the touch sensing trace electrically connected with the touch sensing electrode block is a certain value, wherein the effective resistance is the resistance of the touch sensing trace between the connecting point corresponding to the touch sensing electrode block and the other end point of the second sub-touch sensing trace.
In a second aspect, an embodiment of the present application further provides a touch display device, including the touch display panel.
The touch display panel and the touch display device provided by the embodiment of the application comprise a first substrate, a touch sensing electrode strip arranged on the first substrate and a touch sensing trace electrically connected with the touch sensing electrode strip, wherein each touch sensing electrode strip comprises a plurality of touch sensing electrode blocks, each touch sensing trace comprises a first sub-touch sensing trace and a second sub-touch sensing trace which are electrically connected at one end point of a second sub-touch sensing trace, each touch sensing electrode block is electrically connected with the first sub-touch sensing trace at least one connecting point, and the sum of the resistance of each touch sensing electrode block and the effective resistance of the touch sensing trace electrically connected with the touch sensing electrode block is a certain value, so that the time for the touch sensing trace to output a touch detection signal is the same, and the uniformity of the touch sensitivity of the touch display panel is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 illustrates a schematic structural diagram of a touch display panel in the prior art;
fig. 2A shows a schematic structural diagram of a first embodiment of a touch display panel according to the present application;
fig. 2B is an equivalent circuit diagram of a touch sensing electrode block and a touch sensing electrode trace in the touch display panel of the present application;
FIG. 3A shows the relationship between the touch sensing electrode blocks and the black matrix in the touch display panel;
3B-3H are schematic diagrams illustrating the shape of the touch sensing electrode block in the touch display panel;
fig. 4 shows a schematic diagram of a touch display device provided in an embodiment of the present application.
Detailed Description
The principles and features of the present application are described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a schematic structural diagram of a touch display panel in the prior art is shown. As shown in the figure, in the conventional touch display panel 100, each touch sensing electrode 102 and each touch sensing trace 103 are disposed on the first substrate 101, and each touch sensing electrode 102 is electrically connected to one touch sensing trace 103. The touch sensing electrode 102 may transmit the detected touch sensing signal to the driving chip through a flexible circuit board 106 (FPC). Each touch driving electrode 104 and a touch driving trace (not shown) are disposed on the second substrate 105, and each touch driving electrode 104 is electrically connected to one touch driving trace for sending a touch detection signal on a driving chip to the touch driving electrode 104. In the conventional touch display panel 100, the touch sensing electrodes 102 are generally equal in size, and the lengths of the touch sensing traces 103 electrically connected to the touch sensing electrodes 102 are different, as shown in fig. 1, so that signal delay occurs in different situations when the touch sensing traces 103 output touch sensing signals, which results in poor uniformity of touch sensitivity of the touch display panel 100. Therefore, in order to solve the above problems, the present application provides an improved touch display panel, which improves the uniformity of the touch sensitivity of the touch display panel.
Please refer to fig. 2A, which is a schematic structural diagram of a touch display panel according to an embodiment of the present application. As shown in the figure, the touch display panel 200 of the present embodiment may include a first substrate 201, a touch sensing electrode strip 202, and a touch sensing trace 203.
In this embodiment, the touch display panel 200 may include a plurality of the touch sensing electrode strips 202, each touch sensing electrode strip 202 may be disposed on the first substrate 201, and the touch sensing electrode strips 202 may extend along a first direction and be arranged along a second direction, as shown in the figure. Each of the touch sensing electrode strips 202 may include a plurality of touch sensing electrode blocks 2021, and the touch sensing electrode blocks 2021 are electrically connected to each other to form the touch sensing electrode strip 202.
In this embodiment, the touch display panel 200 may further include a touch sensing trace 203 disposed on the first substrate 201. Each touch sensing trace 203 may include a first sub-touch sensing trace 2031 and a second sub-touch sensing trace 2032, each first sub-touch sensing trace 2031 may be parallel to the first direction, and each second sub-touch sensing trace 2032 may be parallel to the second direction, as shown in fig. 2A. In the same touch sensing trace 203, the first sub-touch sensing trace 2031 and the second sub-touch sensing trace 2032 are electrically connected at one end of the second sub-touch sensing trace 2032. Each touch sensing electrode block 2021 in the touch sensing electrode strip 202 can be electrically connected to the first sub-touch sensing trace 2031 at least one connection point, as shown in fig. 2A. The sum of the resistance R1 of each touch sensing electrode block 2021 and the effective resistance R2 of the touch sensing trace 203 electrically connected to the touch sensing electrode block 2021 can affect the signal delay time of the touch detection signal on the touch sensing electrode block 2021. Here, the effective resistance R2 of the touch sensing trace 203 electrically connected to the touch sensing electrode block 2021 may be a resistance between a connection point corresponding to the touch sensing electrode block 2021 and another end point of the second sub-touch sensing trace 2032 corresponding to the touch sensing electrode block 2021, for example, a in the touch sensing trace 203 shown in fig. 2A1The resistance between-A' can be considered as the connection point A with1The effective resistance R2 of the touch sensing trace 203 of the corresponding touch sensing electrode block 2021, wherein a' is the other end point of the second sub-touch trace 2032 in the touch sensing trace 203. Therefore, the sum of the resistance R1 of each touch sensing electrode block 2021 and the effective resistance R2 of the touch sensing trace 203 electrically connected to the touch sensing electrode block 2021 is controlled to be a constant value, so that each touch sensing electrode block can sense the touch sensing signalThe signal delay time of the touch detection signal on the pole block 2021 is the same, so that the touch sensitivity of the touch display panel 200 is uniform.
Note that, the fixed value of the sum of the resistance R1 of each touch sense electrode block 2021 and the effective resistance R2 of the touch trace of the touch sense electrode block 2021 may have an error within a certain range, that is, if the sum of the resistance R1 and the resistance R2 is within the error range, the sum of the resistance R1 of each touch sense electrode block 2021 and the effective resistance R2 of the touch trace of the touch sense electrode block 2021 may be considered to be a fixed value. For example, if the resistance value of the resistor R1 of one touch sensing electrode block 2021 in the touch display panel is R1, and the resistance value of the effective resistance value R2 electrically connected to the touch sensing electrode block R2 is R2, it can be considered that when the resistor R1 of each of the remaining touch sensing electrode blocks 2021 of the touch display panel and the effective resistor R2 of the touch sensing trace electrically connected thereto satisfy 0.8(R1+ R2) ≦ R1+ R2 ≦ 1.2(R1+ R2), it can be considered that the sum of the resistors R1 and R2 is a certain value within an error range between the resistor R1 and the resistor R2. The error range of the above fixed value can be determined according to actual needs, and is not limited herein.
In some optional implementations of the present embodiment, the touch display panel 200 may further include a second substrate (not shown) and a touch driving electrode 204. The second substrate may be disposed opposite to the first substrate 201, and the touch driving electrodes 204 may be disposed on the second substrate, and the touch sensing electrode bars 202 may be disposed to intersect with the touch driving electrodes 204, so that the projections of the touch sensing electrode blocks 2021 in the touch sensing electrode bars 202 to the second substrate may overlap with the touch driving electrodes 204. For example, the touch driving electrodes 204 may extend along the second direction and be arranged along the first direction, and the orthographic projection of the touch sensing electrode bars 202 on the second substrate 205 is located on the touch driving electrodes 204, as shown in fig. 2A.
In some optional implementations of the present embodiment, each of the touch sensing electrode blocks 2021 may be formed by electrically connecting a plurality of first conductive traces 20211 and second conductive traces 20212, as shown in fig. 2A. It should be noted that the numbers of the first conductive traces 20211 and the second conductive traces 20212 in fig. 2A are only exemplary, and in practical cases, the touch sensing electrode block 2021 may include a large number of first conductive traces 20211 and second conductive traces 20212. Here, the first conductive trace 20211 may be parallel to the first direction, and the second conductive trace 20212 may be parallel to the second direction. The first conductive trace 20211 and the second conductive trace 20212 may be metal traces. Compared with the ITO trace, the resistivity of the metal trace is smaller, which can effectively reduce the resistance of the touch sensing electrode block 2021. It should be noted that the area of the orthographic projection of each touch sensing electrode block 2021 onto the second substrate may be equal, in other words, the total length of all the first conductive traces 20211 and the second conductive traces 20212 in each touch sensing electrode block 2021 may be equal, so that the coupling capacitance C formed between each touch sensing electrode block 2021 and the touch driving electrode 204 may be equal, and it can be understood that the area of the orthographic projection of each touch sensing electrode block 2021 onto the second substrate or the total length of the first conductive traces 20211 and the second conductive traces 20212 in each touch sensing electrode block 2021 may be equal within an error range, so that the coupling capacitance C formed between each touch sensing electrode block and the touch driving electrode 204 is equal within an error range. The error range can be determined by those skilled in the art according to actual needs, and is not limited herein.
The resistance of each touch sensing electrode block 2021 in the touch display panel 200 may be R1, the coupling capacitance between each touch sensing electrode block 2021 and the corresponding touch driving electrode may be C, and the effective resistance of the touch sensing trace 203 electrically connected to each touch sensing electrode block 2021 may be R2, so that the equivalent circuit diagram of the touch sensing electrode block 2021 in the touch display panel 200 and the touch sensing trace 203 electrically connected thereto may be as shown in fig. 2B, where fig. 2B is the equivalent circuit diagram of the touch sensing electrode block and the touch sensing electrode trace in the touch display panel of the present application. It should be noted that, in fig. 2B, each touch sensing trace 203 can be equivalent to a conductive line with a resistance of zero and a resistor with a resistance of R2 electrically connected, and is different from the conductive lineThe effective resistance R2 of the touch sensing trace 203 electrically connected to the touch sensing electrode block 2021 may have different resistances. For example, in FIG. 2B, point A is connected to1The effective resistance R2 of the touch sensing trace 203 electrically connected to the corresponding touch sensing electrode block 2021 has a resistance value a1The resistance a of the resistor between-A' and the connection point A2The effective resistance R2 of the touch sensing trace 203 electrically connected to the corresponding touch sensing electrode block 2021 has a resistance value a2The resistance b of the resistor between-a', obviously, a ≠ b, and thus the effective resistance R2 of the touch sensing trace 203 electrically connected to different touch sensing electrode blocks 2021 can be different. In order to make the sum of the R1 and the R2 a constant value, when the effective resistance R2 of the touch sensing trace 203 has different values, the resistance R1 of the touch sensing electrode block 2021 electrically connected to the touch sensing trace 203 has different values.
In some optional implementation manners of this embodiment, in the touch display panel 200, the first substrate 201 may be a color filter substrate therein, and the second substrate may be an array substrate therein.
In some optional implementation manners of this embodiment, the touch display panel 200 may further include a flexible circuit board, and the flexible circuit board may be electrically connected to each touch sensing trace 203, as shown in fig. 2A. In the second direction, as the distance from each touch sensing electrode block 2021 to the flexible circuit board (FPC) in the touch display panel 200 gradually decreases, the length of the second sub-touch sensing trace 2032 corresponding to each touch sensing electrode block 2021 may gradually decrease, as shown in fig. 2A, that is, the resistance of each second sub-touch sensing trace 2032 gradually decreases. In the same touch sensing electrode bar 202 in the first direction, the resistances of the second sub-touch sensing lines 2032 corresponding to the touch sensing electrode blocks 2021 are the same, the effective resistance of the first sub-touch sensing line 2031 gradually increases or gradually decreases, and the resistance of the touch sensing electrode blocks 2021 gradually decreases or gradually increases, so that the sum of the resistance R1 of each touch sensing electrode block 2021 in the touch panel display panel 200 and the effective resistance R2 of the touch sensing line 203 of the touch sensing electrode block 2021 is a constant value. It should be noted that, the gradual decrease or gradual increase of the resistance of each touch sensing electrode block 2021 in the same touch sensing electrode strip 202 may be regarded as a variation trend of the resistance of the touch sensing electrode block 2021, rather than the absolute difference of the resistance of each touch sensing electrode block 2021. For example, the resistance values of the adjacent touch sensing electrode blocks 2021 may be the same within the allowable error range, as shown in fig. 2A, which is the touch sensing electrode bar RX 1.
Here, when the resistances of the touch sensing electrode blocks 2021 are different, the numbers of the first conductive traces 20211 and/or the second conductive traces 20212 constituting each touch sensing electrode block 2021 may be different; or, when the resistances of the touch sensing electrode blocks 2021 are different, the shapes of the first conductive trace 20211 and the second conductive trace 20212 in each touch sensing electrode block 2021 may be different; or, when the resistances of the touch sensing electrode blocks 2021 are different, the number of connection points between each touch sensing electrode block 2021 and the first sub-touch sensing trace 2031 may be different; or, when the resistances of the touch sensing electrode blocks 2021 are different, the line widths of the first conductive trace 20211 and/or the second conductive trace 20212 in each touch sensing electrode block 2021 are different. Therefore, the number, line width, pitch, density, etc. of the first conductive traces 20211 and/or the second conductive traces 20212 in the touch sensing electrode block 2021 can be changed to make the resistance of the touch sensing electrode block 2021 be a predetermined resistance value, so as to ensure that the sum of the resistance R1 and the resistance R2 in the touch display panel 200 is a certain value.
For example, in the touch sensing electrode bar RX1 of fig. 2A, the effective resistance value R2 of the touch sensing trace 203 electrically connected to each touch sensing electrode block 2021 arranged in the first direction gradually increases, and in order to make the sum of the resistance R1 and the resistance R2A constant value, the resistance R1 of each touch sensing electrode block 2021 arranged in the first direction needs to be gradually decreased. In the touch sensing electrode bar RX1 of fig. 2A, the resistance of each touch sensing electrode block 2021 arranged in the first direction can be reduced by increasing the number of connection points of the touch sensing electrode blocks 2021 in the first direction. As shown in fig. 2A, in the touch sensing electrode bar RXn, the effective resistance value R2 of the touch sensing trace 203 electrically connected to each of the touch sensing electrode blocks 2021 arranged in the first direction gradually increases, and in order to make the sum of the resistance R1 and the resistance R2 constant, the resistance R1 of each of the touch sensing electrode blocks 2021 arranged in the first direction needs to be gradually decreased. In the touch sensing electrode bar RXn of fig. 2A, the resistance of each touch sensing electrode block 2021 arranged in the first direction may be reduced by increasing the number of the second conductive traces 20212 in each touch sensing electrode block 2021 arranged in the first direction. Therefore, the resistance value of the resistor R2 of the touch sensing electrode block 2021 can be changed by changing the number of the first conductive traces 20211 and/or the second conductive traces 20212, the number of the connection points, and the like in the touch sensing electrode block 2021, so as to ensure that the sum of the resistor R1 and the resistor R2 in the touch display panel 200 is a certain value.
In the touch display panel 200, there are usually a large number of intersections between each touch sensing electrode strip 202 and each touch driving electrode 204, and therefore, there may be a large number of touch sensing electrode blocks 2021 in the touch display panel 200. While the effective resistance R2 of the touch sensing trace 203 corresponding to the adjacent touch sensing electrode block 2021 in the same touch sensing electrode strip 202 has a smaller difference, for example, in fig. 2A, a difference between the effective resistances R2 can be obtained by making a1And A2The method for the two corresponding touch sensing electrode blocks 2021 to be adjacent to each other enables the difference between the effective resistances R2 of the touch sensing traces 203 corresponding to the two touch sensing electrode blocks 2021 to be very small, and within an allowable error range, the two touch sensing electrode blocks 2021 can be made to be the same, in this case, the sum of the effective resistances R1 of the two touch sensing electrode blocks 2021 and the effective resistance R2 of the touch sensing trace 203 electrically connected to the two touch sensing electrode blocks 2021 is considered to be the same fixed value, so that the uniformity of the touch sensitivity of each touch sensing point in the touch display panel 200 can be improved.
In some optional implementation manners of this embodiment, the touch sensing trace 203 may be a metal trace. The touch display panel 200 may include a display area and a non-display area. The touch display panel 200 further includes a black matrix disposed on the first substrate 201. Here, the black matrix may include black matrix rows and black matrix columns, the touch sensing electrode bars 202 may be located in a display region of the touch display panel 200, and the second sub-touch sensing trace 2032 may be located in a non-display region of the touch display panel 200. At least a portion of the first sub-touch sensing traces 2031 is located in the display area, and an orthogonal projection of the first sub-touch sensing traces 2031 in the display area of the touch display panel 200 onto the first substrate 201 may at least partially coincide with an orthogonal projection of the black matrix row onto the first substrate 201, so as to reduce or even avoid an influence of the touch sensing traces 203 on a light transmittance of the touch display panel 200. For example, when the line width of the first sub-touch sensing trace 2031 is less than or equal to the width of the black matrix row, the orthographic projection of the first sub-touch sensing trace 2031 to the first substrate 201 and the orthographic projection of the black matrix row to the first substrate 201 may completely coincide with each other, so as to prevent the touch sensing trace 203 from affecting the light transmittance of the touch display panel 200.
In some optional implementations of the present embodiment, a relationship between the touch sensing electrode blocks and the black matrix in the touch display panel may be as shown in fig. 3A. Here, the black matrix 306 may include black matrix rows 3061 and black matrix columns 3062, and as shown, the black matrix rows 3061 may be parallel to a first direction and the black matrix columns 3062 may be parallel to a second direction. The orthographic projection of the first conductive trace 30211 on the first substrate where the first conductive trace 30211 in the touch sensing electrode block and the orthographic projection of the black matrix row 3061 on the first substrate may at least partially coincide, the orthographic projection of the second conductive trace 30212 on the first substrate where the second conductive trace 30212 is located and the orthographic projection of the black matrix column 3062 on the first substrate may at least partially coincide, for example, the orthographic projection of the first conductive trace 30211, the second conductive trace 30212, the black matrix row 3061 and the black matrix column 3062 on the first substrate may be as shown in fig. 3A, the orthographic projection of the first conductive trace 30211 on the first substrate and the orthographic projection of the black matrix column 3062 on the first substrate may completely coincide, and the orthographic projection of the second conductive trace 30212 on the first substrate and the orthographic projection of the black matrix column 3062 on the first substrate may completely coincide. Thus, even if the first conductive trace 30211 and the second conductive trace 30212 are metal traces, the light transmittance of the touch sensing electrode block formed by the first conductive trace 30211 and the second conductive trace 30212 is not affected.
In some alternative implementations of this embodiment, if the distance between adjacent black matrix rows 3061 is a and the distance between adjacent black matrix columns 3062 is b, the length s1 of the first conductive trace 30211 along the first direction may be an integer multiple of b, and the length s2 of the second conductive trace 30212 along the second direction may be an integer multiple of a. The arrangement can enable the orthographic projection of the first conductive trace 30211 and the second conductive trace 30212 on the first substrate on which the first conductive trace 30211 and the second conductive trace 30212 are located to be located on the black matrix 306 after the first conductive trace 30211 and the second conductive trace 30212 in each touch sensing electrode block are electrically connected to each other. As shown in fig. 3A, the first conductive trace 30211 in the touch sensing electrode block may be disposed between adjacent black matrix columns 3062, and the second conductive trace 30212 may be disposed between adjacent black matrix rows 3061, i.e., s1 ═ b and s2 ═ a, then the orthographic projections of the first conductive trace 30211 and the second conductive trace 30212 on the black matrix 306. Alternatively, the first conductive traces 30211 in the touch sensing electrode block may be disposed between the spaced black matrix columns 3062, and the second conductive traces 30212 may be disposed between the spaced black matrix rows 3061, i.e., s1 ═ 2b, and s2 ═ 2 a. Here, the lengths of the first conductive trace 30211 and the second conductive trace 30212 in each touch sensing electrode block 3021 can be determined according to actual needs, which is not limited herein.
In some optional implementation manners of this embodiment, by controlling the shape formed by the first conductive trace 30211 and the second conductive trace 30212, the number of the first conductive trace 30211 and/or the second conductive trace 30212, the number of connection points where the touch sensing electrode block is electrically connected to the corresponding touch sensing trace 302, and the like in the touch sensing electrode block, the resistance R1 of the touch sensing electrode block can be a preset resistance value. As shown in fig. 3B or fig. 3C, the touch sensing electrode blocks shown in fig. 3B and fig. 3C may include the same number of first conductive traces 30211 and the same number of second conductive traces 30212, but the number of connection points for electrically connecting with the touch sensing traces is different, and the shapes of the connection points are different, so that the resistances of the resistors of the touch sensing electrode blocks shown in fig. 3B and the touch sensing electrode blocks shown in fig. 3C are different. It is understood that the touch sensing electrode blocks shown in fig. 3B-3H can be formed according to the number of the first conductive traces 30211 and/or the second conductive traces 30212 in each touch sensing electrode block, the number of the connection points where the touch sensing electrode block 3021 is electrically connected to the corresponding touch sensing traces, and the like. Specifically, the number of the first conductive traces 30211 and/or the second conductive traces 30212 in each touch sensing electrode block, the number of the connection points where the touch sensing electrode block is electrically connected to the corresponding touch sensing trace, and the like can be determined according to the actual requirement of the resistance R1 of the touch sensing electrode block, which is not limited herein. The touch sensing electrode blocks shown in fig. 3G and 3H can be regarded as being formed by grid lines which spirally and inwardly detour. Comparing fig. 3G and fig. 3H, the length and width of the touch sensing electrode block are equal, and the lengths of the first conductive trace 30211 and the second conductive trace 30212 constituting the touch sensing electrode block are also the same, and the length of the grid line in the touch sensing electrode block shown in fig. 3G is smaller than the length of the grid line in the touch sensing electrode block shown in fig. 3H, so the resistance of the touch sensing electrode block shown in fig. 3G may be smaller than the resistance of the touch sensing electrode block shown in fig. 3H. Further, the touch sensing electrode block shown in fig. 3G can be obtained by disconnecting a part of the first conductive trace 30211 and a part of the second conductive trace 30212 in the touch sensing electrode block shown in fig. 3H.
The touch display panel 200 provided in the above embodiments of the present application includes a first substrate 201, and a touch sensing electrode strip 202 disposed on the first substrate 201 and a touch sensing trace 203 electrically connected to the touch sensing electrode strip 202, each touch sensing electrode strip 202 includes a plurality of touch sensing electrode blocks 2021, each touch sensing trace 203 includes a first sub-touch sensing trace 2031 and a second sub-touch sensing trace 2032 electrically connected at one end of the second sub-touch sensing trace 2032, each touch sensing electrode block 2021 is electrically connected to the first sub-touch sensing trace 2031 at least one connection point, a sum of a resistance of each touch sensing electrode block 2021 and an effective resistance of the touch sensing trace 203 connected to the touch sensing electrode block 2021 is a certain value, therefore, the time for the touch sensing trace 203 to output the touch detection signal is the same, and the touch sensitivity uniformity of the touch display panel 200 is improved.
In addition, the present application also provides a touch display device 400, which may include the touch display panel in the above embodiments. Here, as shown in fig. 4, fig. 4 is a schematic diagram illustrating a touch display device according to an embodiment of the present application. The touch display device 400 can be a mobile phone with a touch function as shown in fig. 4, and the structure and function of the touch display panel in the touch display device 400 are the same as those in the above embodiments, and are not repeated here. It can be understood by those skilled in the art that the touch display device can also be a computer, a television, a wearable smart device, etc. with a touch function, which is not listed here. The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (16)
1. A touch display panel, comprising:
a first substrate;
the touch sensing electrode strips are arranged on the first substrate, extend along a first direction and are arranged along a second direction, the first direction and the second direction are crossed, and each touch sensing electrode strip comprises a plurality of touch sensing electrode blocks;
a plurality of touch sensing traces disposed on the first substrate, the touch sensing traces including a first sub-touch sensing trace parallel to the first direction and a second sub-touch sensing trace parallel to the second direction, the first sub-touch sensing trace and the second sub-touch sensing trace being electrically connected at an end point of the second sub-touch sensing trace;
in the same touch sensing electrode strip, each touch sensing electrode block is electrically connected with the same first sub-touch sensing wire respectively;
in the same touch sensing electrode strip, the resistances of the second sub-touch sensing lines corresponding to each touch sensing electrode block are the same, the effective resistance of the corresponding first sub-touch sensing lines is gradually increased, and the resistance of each touch sensing electrode block is gradually decreased; the effective resistance of the first sub-touch sensing trace is the resistance of the first sub-touch sensing trace between the connection point of the first sub-touch sensing trace and the touch sensing electrode block and the connection point of the first sub-touch sensing trace and the second sub-touch sensing trace;
the sum of the resistance of each touch sensing electrode block and the effective resistance of the touch sensing trace electrically connected with the touch sensing electrode block is a certain value, wherein the effective resistance is the resistance of the touch sensing trace between the connecting point corresponding to the touch sensing electrode block and the other end point of the second sub-touch sensing trace.
2. The touch display panel according to claim 1, further comprising:
a second substrate disposed opposite to the first substrate;
the touch driving electrodes are arranged on the second substrate and are crossed with the touch sensing electrode strips, so that the orthographic projection of the touch sensing electrode blocks in the touch sensing electrode strips to the second substrate is overlapped with the touch driving electrodes;
and coupling capacitors between the touch sensing electrode blocks and the touch driving electrodes are equal in size.
3. The touch display panel according to claim 1, wherein the touch sensing electrode block includes a plurality of first conductive traces and second conductive traces electrically connected to each other, the first conductive traces being parallel to the first direction, and the second conductive traces being parallel to the second direction.
4. The touch display panel according to claim 2, wherein the areas of orthographic projections of the touch sensing electrode blocks on the second substrate are equal.
5. The touch display panel according to claim 3, wherein in each of the touch sensing electrode blocks, a sum of the lengths of the first conductive traces and the lengths of the second conductive traces is equal to each other.
6. The touch display panel of claim 3, wherein the first conductive trace and the second conductive trace are metal traces;
the touch sensing wiring is a metal wiring.
7. The touch display panel according to claim 6, further comprising:
a black matrix disposed on the first substrate, the black matrix including black matrix rows and black matrix columns disposed in an intersection, wherein the black matrix rows are parallel to the first direction, and the black matrix columns are parallel to the second direction;
the orthographic projection of the first conductive routing line to the first substrate is at least partially overlapped with the orthographic projection of the black matrix row to the first substrate, and the orthographic projection of the second conductive routing line to the first substrate is at least partially overlapped with the orthographic projection of the black matrix column to the first substrate.
8. The touch display panel according to claim 7, wherein an orthogonal projection of the first conductive traces onto the first substrate is within an orthogonal projection of the black matrix rows onto the first substrate, and an orthogonal projection of the second conductive traces onto the first substrate is within an orthogonal projection of the black matrix columns onto the first substrate.
9. The touch display panel according to claim 1, further comprising a flexible circuit board electrically connected to each of the touch sensing traces;
as the distance from each touch sensing electrode block arranged along the second direction to the flexible circuit board is gradually reduced, the length of a second sub-touch sensing trace corresponding to each touch sensing electrode block arranged along the second direction is gradually reduced.
10. The touch display panel according to claim 1, wherein the resistance of each of the touch sensing electrode blocks arranged in the first direction gradually decreases.
11. The touch display panel according to one of claims 5 to 8, wherein the first conductive traces and the second conductive traces electrically connected to each other in the touch sensing electrode blocks adjacent to each other in the first direction and/or the second direction have different shapes.
12. The touch display panel according to claim 11, wherein the number of the connecting points of the adjacent touch sensing electrode blocks electrically connected to the corresponding first sub-touch sensing trace is different.
13. The touch display panel according to claim 7, wherein the touch display panel includes a display area and a non-display area;
each touch sensing electrode strip is arranged in the display area, and each second sub-touch sensing wire is arranged in the non-display area;
in the display area, the orthographic projection of each first sub-touch sensing route to the first substrate is at least partially overlapped with the orthographic projection of the black matrix row to the first substrate.
14. The touch display panel of claim 13, wherein an orthogonal projection of the first sub-touch sensing trace onto the first substrate is within an orthogonal projection of the black matrix row onto the first substrate.
15. The touch display panel according to claim 7, wherein in the second direction, a distance between adjacent black matrix rows is a;
in the first direction, the distance between adjacent black matrix columns is b;
the length of the first conductive routing is integral multiple of b, and the length of the second conductive routing is integral multiple of a.
16. A touch display device comprising the touch display panel according to any one of claims 1 to 15.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610683494.7A CN106249960B (en) | 2016-08-18 | 2016-08-18 | Touch display panel and touch display device |
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| CN201610683494.7A CN106249960B (en) | 2016-08-18 | 2016-08-18 | Touch display panel and touch display device |
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| CN106249960B true CN106249960B (en) | 2020-06-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153492B (en) * | 2017-07-24 | 2019-11-22 | 厦门天马微电子有限公司 | Array substrate and touch-control display panel |
| CN107491213B (en) * | 2017-08-28 | 2020-05-15 | 厦门天马微电子有限公司 | Display panel and display device |
| CN107704143B (en) * | 2017-09-14 | 2021-02-09 | 京东方科技集团股份有限公司 | Substrate and display device |
| JP2019113656A (en) * | 2017-12-22 | 2019-07-11 | シャープ株式会社 | Liquid crystal panel |
| CN109885203B (en) | 2019-02-28 | 2020-12-04 | 武汉华星光电半导体显示技术有限公司 | Touch sensor, display panel and display device |
| CN111522463A (en) * | 2020-04-15 | 2020-08-11 | 京东方科技集团股份有限公司 | Flexible touch panel and display device |
| CN111399697A (en) * | 2020-04-30 | 2020-07-10 | 武汉华星光电技术有限公司 | Thin film transistor array substrate and touch display panel |
| CN114168017B (en) * | 2021-12-14 | 2024-02-27 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN104536631A (en) * | 2015-01-26 | 2015-04-22 | 京东方科技集团股份有限公司 | Touch display substrate and touch display device |
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