Touch panel, display screen and electronic device
By setting multiple patterns in the touch graphics layer, each pattern corresponds to a different maximum capacitance value, so that the same touch trace can connect multiple patterns, solving the problem of touch delay in narrow border design and achieving more High system performance and lower cost.
Patent Information
- Application Number
- CN202011412621.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-12-03
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2040-12-03
AI Technical Summary
The narrow bezel design causes too large touch trace resistance, affecting the touch experience and device performance.
Design a touch panel, by setting multiple patterns in the touch graphics layer, each pattern corresponds to a different maximum capacitance value, so that the same touch trace can connect multiple patterns, reduce the number of traces and meet narrow borders Designed without touch delay.
It effectively reduces the number of touch traces, improves system performance, saves trace frame space, reduces the risk of static electricity release, and reduces the number of connection pins, reducing the mold composition cost.
Smart Images
Figure CN112558820B_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the display field, and in particular to a touch panel, a display screen and an electronic device. Background Art
[0002] The current display design, especially for mobile phone products, has higher and higher requirements for the border, generally requiring narrow border or borderless design to enhance the sense of technology and experience of the display. However, this design brings many problems, among which the problem of touch wiring is particularly prominent. The narrow border design compresses the space of touch wiring, making the wiring thinner, which brings the problem of excessive wiring resistance. Excessive resistance will affect the touch experience, cause touch delay and other problems, and reduce the overall performance of the device. Summary of the invention
[0003] In view of this, the embodiments of the present disclosure propose a touch panel, a display screen and an electronic device to solve the following problems in the prior art: the narrow frame design compresses the space for touch wiring, making the wiring thinner, but brings the problem of excessive wiring resistance. Excessive resistance will affect the touch experience, cause touch delays, and reduce the overall performance of the device.
[0004] On the one hand, an embodiment of the present disclosure proposes a touch panel, comprising: a touch contact layer, a touch graphic layer corresponding to the touch contact layer, a touch routing layer connected to the touch graphic layer, and a connecting pin connected to each touch routing; wherein the touch contact layer works together with the touch graphic layer to generate a capacitance value for determining a touch point when receiving a touch operation; each touch routing is connected to multiple patterns in the touch graphic layer, and the multiple patterns connected to each touch routing have different maximum capacitance values relative to the touch contact layer; and each touch routing is connected to a connecting pin.
[0005] In some embodiments, the touch graphic layer includes: a plurality of patterns with the same touch area, each pattern having a different height value relative to the touch contact layer.
[0006] In some embodiments, the touch graphic layer includes: high and low base layers with different thicknesses, and patterns with the same thickness respectively arranged on high and low parts of the high and low base layers.
[0007] In some embodiments, the touch graphic layer includes: a base layer having a same thickness, and a pattern having different thicknesses disposed on the base layer.
[0008] In some embodiments, the touch graphic layer includes: the touch graphic layer has multiple partitions, the height values of patterns in each partition relative to the touch contact layer are the same, and the height values of the partitions relative to the touch contact layer are different.
[0009] In some embodiments, the touch graphic layer includes: a plurality of patterns with different touch areas, and each pattern has a same height value relative to the touch contact layer.
[0010] In some embodiments, the touch graphic layer includes: a plurality of patterns with different touch areas, each pattern having a different height value relative to the touch contact layer.
[0011] On the other hand, an embodiment of the present disclosure provides a display screen, which at least includes: the touch panel described in any embodiment of the present disclosure.
[0012] On the other hand, an embodiment of the present disclosure provides an electronic device, comprising at least: a display screen as described in any embodiment of the present disclosure.
[0013] In some embodiments, it also includes: an IC chip, connected to each connecting pin, for receiving one or more capacitance values, and determining the touch point according to the one or more capacitance values, wherein the IC chip also has a display processing function; a control line, connected to the IC chip through the connecting pins, for sending a control signal.
[0014] The disclosed embodiment designs the touch capacitor, and designs different capacitors for the touch patterns in the touch graphic layer relative to the touch contact layer, so that the same touch line can be connected to multiple patterns, reducing the number of touch lines. This not only meets the existing narrow frame design, but also avoids the problem of touch delay, thereby improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0016] Figure 1 A schematic diagram of the principle of a touch panel provided in an embodiment of the present disclosure;
[0017] Figure 2 It is a schematic diagram of pattern arrangement in the prior art;
[0018] Figure 3 A schematic diagram of a touch panel pattern arrangement provided in an embodiment of the present disclosure Figure 1 ;
[0019] Figure 4 A schematic diagram of a touch panel pattern arrangement provided in an embodiment of the present disclosure Figure 2 ;
[0020] Figure 5 A cross-sectional view of a touch panel provided in an embodiment of the present disclosure Figure 1 ;
[0021] Figure 6 A cross-sectional view of a touch panel provided in an embodiment of the present disclosure Figure 2 ;
[0022] Figure 7 A schematic diagram of the pattern arrangement of the traditional TDDI touch method;
[0023] Figure 8 A schematic diagram of a pattern arrangement of a TDDI touch control method provided in an embodiment of the present disclosure;
[0024] Fig. 9 A schematic diagram of a touch panel pattern arrangement provided in an embodiment of the present disclosure Figure 3 ;
[0025] Fig.10 A schematic diagram of a touch panel pattern arrangement provided in an embodiment of the present disclosure Figure 4 ;
[0026] Fig.11 A schematic diagram of a touch panel pattern arrangement provided in an embodiment of the present disclosure Figure 5 .
[0027] Reference numerals:
[0028] 1-touch contact layer, 2-touch graphic layer, 3-touch routing layer, 4-connection pin, Rx-touch routing, 21-pattern. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0030] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0031] In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of well-known functions and well-known components.
[0032] The present disclosure provides a touch panel, the principle of which is shown as follows: Figure 1 As shown, including:
[0033] A touch contact layer 1, a touch graphic layer 2 corresponding to the touch contact layer, a touch routing layer 3 connected to the touch graphic layer 2, and a connecting pin 4 connected to each touch routing Rx; wherein the touch contact layer 1 works together with the touch graphic layer 2 to generate a capacitance value for determining a touch point when a touch operation is received; each touch routing Rx is connected to a plurality of patterns 21 in the touch graphic layer 2, and the plurality of patterns 21 connected to each touch routing Rx have different maximum capacitance values relative to the touch contact layer 1; and each touch routing Rx is connected to a connecting pin 4.
[0034] The disclosed embodiment designs the touch capacitor, and designs different capacitors for the touch patterns in the touch graphic layer relative to the touch contact layer, so that the same touch line can be connected to multiple patterns, reducing the number of touch lines. This not only meets the existing narrow frame design, but also avoids the problem of touch delay, thereby improving system performance.
[0035] In specific implementation, in order to make each pattern have different maximum capacitance values relative to the touch contact layer, when designing the patterns, the patterns can be set to have the same touch area, or the patterns can be designed to have different touch areas, which are explained below respectively.
[0036] Figure 2This is a schematic diagram of pattern arrangement in the prior art. For SLOC (Single Layer on Cell, i.e., single-layer pattern on glass, the technology of making ITO pattern on CF glass in a single-layer bridge manner is called oncell touch technology) pattern, one Tx signal corresponds to multiple Rx signals (i.e., touch lines). Tx sends a signal, and Rx receives the signal in turn. The pattern position corresponding to the Rx signal with the largest signal change is the touch position. As can be seen from the figure, each pattern is connected to a touch line, and the touch lines need to occupy a large layout area.
[0037] When the touch graphic layer includes multiple patterns with the same touch area, such as Figure 3 , which is a schematic diagram of a pattern arrangement of an embodiment of the present disclosure. It can be seen from the figure that since the two patterns connected to each touch line have different maximum capacitance values relative to the touch contact layer, a touch line can be connected to two patterns at the same time.
[0038] Figure 3 This is only one possible arrangement, and those skilled in the art can change it. For example, the touch graphic layer is divided into a plurality of partitions, and the height values of the patterns in each partition relative to the touch contact layer are the same, and the height values of the partitions relative to the touch contact layer are different, such as Figure 4 As shown, the maximum capacitance values of the patterns corresponding to the upper half of the touch panel are all set to the first capacitance value, and the maximum capacitance values of the patterns corresponding to the lower half of the touch panel are all set to the second capacitance value. At this time, each touch line can still be connected to two patterns. Figure 3 This is just an example. One touch line may be connected to more patterns at the same time, as long as the connected patterns have different maximum capacitance values.
[0039] In this embodiment, the touch patterns are all square. Figure 3 or Figure 4 In the pattern of the middle touch graphic layer, each pattern connected by each touch line has a different height value relative to the touch contact layer, thereby achieving an effect of having different maximum capacitance values relative to the touch contact layer. In the case of the same touch area, different height values can be achieved in the following two ways: (1) processing the substrate, that is, having high and low substrate layers with different thicknesses, and patterns with the same thickness are respectively arranged on the high and low parts of the high and low substrate layers; (2) not processing the substrate, that is, having substrate layers with the same thickness, and patterns with different thicknesses are arranged on the substrate layers.
[0040] By processing the substrate, the heights of the two patterns can be made different. One touch line can be used to connect to two areas of different heights at the same time. Due to the height difference of the patterns, the capacitance of the finger touching different positions during touch scanning is quite different. Based on the difference in touch capacitance, the same touch line can be used to distinguish the two touch patterns. Figure 5 This method can reduce the touch line to half of the original, and the reduction of touch lines is greater with different height differences.
[0041] By not treating the substrate, the heights of the two patterns can also be different, such as Figure 6 As shown, by making different patterns with different thicknesses, different touch pattern heights can also be achieved.
[0042] For the TDDI (Touch and Display Driver Integration) touch solution, TDDI combines the display layer with the touch layer, using the same IC chip for both display and touch. This method can save touch IC chips, but too many touch pins (connection pins) will increase costs. Traditional TDDI touch methods such as Figure 7 As shown, different touch control areas are divided into multiple independent touch control patterns, and each touch control pattern is connected to the display IC chip through a touch control line. There are many such touch control lines.
[0043] like Figure 8 The figure shows a pattern arrangement diagram of the TDDI touch method provided in an embodiment of the present disclosure, in which different areas are set to have different touch pattern heights. For example, the traditional solution uses a single ITO2 as a touch pattern, and the new solution uses ITO1&ITO2 (i.e., two patterns) as touch patterns at the same time. The ITO1&ITO2 pattern is connected to a touch wiring at the same time, so that the touch wiring can be reduced to 1 / 2 of the original. Similarly, by using ITO1&ITO2&ITO3 wiring, the touch wiring can be reduced to 1 / 3.
[0044] Of course, the above drawings of the embodiments of the present disclosure are only examples, and the above patterns do not have to be square. Those skilled in the art can also design different surface area shapes for the patterns as long as the touch area is the same.
[0045] When the touch graphic layer includes multiple patterns with different touch areas, each pattern may have the same height value relative to the touch contact layer. Fig. 9As shown, it is a schematic diagram of a pattern arrangement of an embodiment of the present disclosure. It can be seen from the figure that since the two patterns connected to each touch line have different touch areas relative to the touch contact layer, resulting in different maximum capacitance values, a touch line can be connected to two patterns at the same time.
[0046] exist Fig. 9 In the example, one touch line is connected to the top, middle and bottom patterns with different touch areas. Due to the difference in pattern size, the touch patterns are distinguished according to the difference in touch capacitance during touch scanning. This can reduce the number of touch lines to one third of the original.
[0047] A variety of patterns with different touch areas can also be Fig.10 As shown in FIG. 1 , the touch patterns in adjacent areas are made into hollow shapes to obtain three touch patterns with different touch areas, so that the touch signal amounts when different areas are touched are also different. Fig.11 As shown, the adjacent touch patterns are made into irregular-shaped patterns with different areas, and those skilled in the art can set it according to actual needs.
[0048] In order to allow a touch line to connect more patterns, the touch graphic layer may be designed to have not only a plurality of patterns with different touch areas, but also each pattern may have a different height value relative to the touch contact layer.
[0049] The disclosed embodiments reduce touch wiring and save wiring frames. Under the premise of the same frame, the wiring can be wider, giving more space to surrounding GND (anti-static wiring) and other wiring, reducing the occurrence of ESD (electrostatic discharge) defects. Under the same line width, the touch wiring frame is narrower; the number of touch bonding pins is reduced, saving space and the cost of the touch module; the solution is simple, does not increase additional processes, does not increase additional costs, and is highly feasible.
[0050] The disclosed embodiment also provides a display screen, which at least includes the touch panel in the above embodiment.
[0051] The disclosed embodiment also provides an electronic device, which at least includes the above-mentioned display screen. Of course, it can also include: an IC chip connected to each connecting pin, used to receive one or more capacitance values, and determine the touch point according to the one or more capacitance values, wherein the IC chip also has a display processing function; a control line, connected to the IC chip through the connecting pin, used to send a control signal.
[0052] The touch pattern design disclosed in the embodiment of the present disclosure adopts touch patterns of different heights at different positions, and uses the different capacitance changes when touching patterns of different heights, and uses the same touch line for control, so as to achieve the purpose of scanning the touch position with fewer touch lines, which can reduce the touch frame, reduce the number of touch lines, reduce touch bonding pins, and improve the touch reporting rate.
[0053] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present disclosure with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.
[0054] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present disclosure. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present disclosure may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present disclosure should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.
[0055] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection claimed by the present disclosure.
Claims
1. A touch panel, characterized in that: include: A touch contact layer, a touch graphic layer corresponding to the touch contact layer, a touch wiring layer connected to the touch graphic layer, and a connecting pin connected to each touch wiring; wherein, The touch contact layer works together with the touch graphic layer to generate a capacitance value for determining a touch point when a touch operation is received; Each touch line is connected to a plurality of patterns in the touch graphic layer, and the plurality of patterns connected to each touch line have different maximum capacitance values relative to the touch contact layer; Each touch trace is connected to a connection pin; The touch graphic layer is divided into two partitions, the patterns in the two partitions have the same height value relative to the touch contact layer, and the height values of each partition relative to the touch contact layer are different. The maximum capacitance value of the pattern corresponding to the upper half of the touch panel is set to a first capacitance value, and the maximum capacitance value of the pattern corresponding to the lower half of the touch panel is set to a second capacitance value; a touch routing line is simultaneously connected to two areas with different heights; and a touch routing line is connected to a pattern in the upper half and a pattern in the lower half.
2. The touch panel according to claim 1, wherein: The touch graphic layer comprises: There are a plurality of patterns with the same touch area, and each pattern has a different height value relative to the touch contact layer.
3. The touch panel according to claim 2, wherein: The touch graphic layer comprises: A high and low base layer with different thicknesses, and patterns with the same thickness are respectively arranged on the high and low parts of the high and low base layer.
4. The touch panel according to claim 2, wherein: The touch graphic layer comprises: A base layer having the same thickness, and patterns having different thicknesses disposed on the base layer.
5. The touch panel according to any one of claims 1 to 4, characterized in that: The touch graphic layer comprises: The touch graphic layer has a plurality of partitions, the height values of the patterns in each partition relative to the touch contact layer are the same, and the height values of the partitions relative to the touch contact layer are different.
6. The touch panel according to claim 1, wherein: The touch graphic layer comprises: There are a plurality of patterns with different touch areas, and each pattern has a same height value relative to the touch contact layer.
7. The touch panel according to claim 1, wherein: The touch graphic layer comprises: There are a plurality of patterns with different touch areas, and each pattern has a different height value relative to the touch contact layer.
8. A display screen, characterized in that: At least: The touch panel according to any one of claims 1 to 7.
9. An electronic device, characterized in that: At least: The display screen as claimed in claim 8.
10. The electronic device according to claim 9, characterized in that: Also includes: An IC chip connected to each of the connection pins, used to receive one or more capacitance values and determine the touch point according to the one or more capacitance values, wherein the IC chip also has a display processing function; The control line is connected to the IC chip through the connecting pin and is used to send a control signal.