Touch control circuit and electronic equipment with touch control function

Abstract

The utility model relates to the technical field of touch control products, and discloses a touch control circuit and an electronic device with a touch control function, the touch control circuit is arranged in a touch control area and comprises a first signal line, a second signal line, a third signal line and a fourth signal line, and the first signal line spirally extends outwards with the center of the touch control area as a starting point; the second signal line is diverged outwards in a radial shape by taking the center of the touch area as a starting point; the first signal circuit and the second signal circuit are arranged in a superposed manner, and the touch area is divided into a plurality of touch capacitance value areas. The first signal line is arranged to extend spirally, and the second signal line is arranged to diverge radially, so that the line utilization rate is effectively improved, and the signal transmission redundancy is reduced. Meanwhile, the space utilization rate and the compactness of the whole machine are improved, the width of the jaw of the product is reduced, and the reliability of the product is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of touch products, and in particular to a touch circuit and an electronic device with a touch function. Background Art

[0002] With the development of technology, wearable devices, especially wearable watches, have been widely used. At present, most wearable watches use OLED (Organic Light-Emitting Diode) panels, and their touch functions are mostly set on the EncapGlass (cover glass) in an on-cell mode, such as Figure 1 shown.

[0003] like Figure 2 As shown, in existing capacitive touch screen technology, mutual capacitance is achieved using the transmitter (TX) and receiver (RX) circuits within the IC. Specifically, the IC transmits a signal through the transmitter's Driver PIN, which is then received by the receiver's SENSOR PIN. When a finger touches the touch screen, coupling between two electrodes near the touch point changes the capacitance between them. To measure mutual capacitance, the horizontal electrodes sequentially emit excitation signals, while all vertical electrodes receive the signals simultaneously, thereby determining the capacitance of the entire two-dimensional touch screen. When the received signal strength is close to the transmitted signal strength, the finger is deemed not to have touched the touch screen. When the received signal strength is significantly lower than the transmitted signal strength, the TP (touch screen) is considered to be touched. Based on the two-dimensional capacitance change data of the touch screen, the coordinates of each touch point can be calculated, even when multiple touch points are present.

[0004] However, taking a round watch as an example, Figure 3 As shown, the EncapGlass structure in the prior art has some problems in practical applications. On the one hand, in circular products, due to the low utilization rate of the circuit, it leads to waste of resources and may affect the touch performance. On the other hand, generally speaking, there is a relatively weak part in the overall structure of the circular display on the side relatively close to the user's wrist. This part is called the "chin". In reliability tests, it was found that the strength of the "chin" of circular products is low and easy to break. Once the "chin" is broken, it will directly lead to the failure of the touch function, seriously affecting the user experience and the service life of the product, increasing the maintenance cost and product failure rate, and reducing the market competitiveness of the product. Therefore, there is a need to improve the existing technology.

[0005] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Utility Model Content

[0006] The utility model provides a touch circuit and an electronic device with a touch function, so as to solve the problems existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A touch circuit is provided in a touch area, comprising:

[0009] a first signal circuit, the first signal circuit extending outward in a spiral shape starting from the center of the touch area;

[0010] a second signal line, the second signal line radiating outwards in a radial shape from the center of the touch area;

[0011] The first signal circuit and the second signal circuit are arranged in an overlapping manner, dividing the touch area into a plurality of touch capacitance areas.

[0012] Optionally, the first signal line is a signal transmitting line, and the second signal line is a signal receiving line.

[0013] Optionally, the line spacing of the first signal lines decreases from the middle toward the outside, so that the areas of the touch capacitance regions are equal.

[0014] Optionally, the line spacings of the second signal lines are uniform.

[0015] Optionally, the touch control circuit further includes a signal transmission control module;

[0016] The signal transmission control module is electrically connected to the first signal circuit, and is used to control the first signal circuit to transmit a signal at a predetermined frequency.

[0017] Optionally, the touch control circuit further includes a timer, the timer being configured to obtain a time difference between a moment when a signal is transmitted from the first signal line and a moment when a signal change occurs on the second signal line;

[0018] The time difference is used to determine the touch location.

[0019] Optionally, the intersection of the first signal line and the second signal line is connected by welding.

[0020] Optionally, the touch area is circular.

[0021] The present invention further provides an electronic device with a touch function, comprising a touch area, wherein the touch circuit as described in any one of the above items is provided in the touch area.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This utility model provides a touch circuit and electronic device with touch functionality. By designating a first signal line as a spiral extension and a second signal line as a radial divergence, this effectively improves line utilization and reduces signal transmission redundancy. Furthermore, this utility model helps improve space utilization and overall device compactness, reducing the width of the product's "chin" and thereby enhancing product reliability.

[0024] The present invention has other features and advantages, which will be apparent from the accompanying drawings and subsequent detailed descriptions incorporated herein, or will be described in detail in the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a layer structure diagram of an OLED touch panel for wearable equipment in the prior art;

[0027] Figure 2 Schematic diagram of the mutual capacitance principle of a capacitive touch screen in the prior art;

[0028] Figure 3 Schematic diagram of the cover glass structure of a round watch in the prior art;

[0029] Figure 4 This is a structural diagram of a first signal circuit in a touch control circuit provided by an embodiment of the present utility model;

[0030] Figure 5 This is a structural diagram of a second signal circuit in a touch control circuit provided by an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the mutual capacitance principle of a touch control circuit provided by an embodiment of the present utility model.

[0032] Reference numerals: 10, touch area; 11, first signal line; 12, second signal line; 13, touch capacitance area. DETAILED DESCRIPTION

[0033] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0034] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0035] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0037] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0038] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0039] The technical solutions of the utility model embodiments are described in detail below with reference to the accompanying drawings.

[0040] Please refer to Figure 4 and Figure 5The present invention provides a touch circuit, which is disposed in a touch area 10 and includes a first signal line 11 and a second signal line 12. The touch area 10 may be circular and applied to the touch sensing portion of a circular electronic device, such as a circular smartwatch or a circular touch display.

[0041] In this embodiment, the first signal line 11 extends outward in a spiral shape starting from the center of the touch area 10 to cover the entire touch area 10 as much as possible. The first signal line 11 serves as a signal transmission line and is responsible for sending signals to the entire touch area 10.

[0042] The second signal circuit 12 radiates outward in a radial shape starting from the center of the touch area 10 . This radial structure enables the second signal circuit 12 to receive signals from the touch area 10 in all directions.

[0043] The second signal line 12 serves as a signal receiving line and cooperates with the first signal line 11. The two are arranged in a superimposed manner, thereby dividing the touch area 10 into multiple touch capacitance zones 13. This division method allows each point in the touch area 10 to determine touch information through a unique capacitance zone identifier.

[0044] Specifically, the line spacing of the first signal lines 11 decreases from the middle toward the outside, and the line spacing of the second signal lines 12 is uniform, so that the areas of the touch capacitance regions 13 are uniform.

[0045] In this embodiment, the intersection of the first signal line 11 and the second signal line 12 is connected by welding, which can ensure good electrical connection performance of the intersection, ensure stable signal transmission at the intersection, and reduce signal loss and interference.

[0046] Furthermore, in this embodiment, the touch circuit also includes a signal transmission control module, which is used to connect to the control IC of the electronic device and electrically connected to the first signal line 11, and can control the first signal line 11 to transmit signals according to a predetermined frequency.

[0047] It is understood that the aforementioned predetermined frequency is pre-set based on actual needs and the touch performance requirements of the electronic device. For example, in some devices with high touch response speed requirements, the predetermined frequency may be relatively high; while in some devices with strict power consumption requirements, the predetermined frequency will be appropriately adjusted while meeting the touch function, to balance power consumption and performance.

[0048] Furthermore, in this embodiment, the touch control circuit further includes a timer for obtaining a time difference between the moment when the first signal line 11 transmits a signal and the moment when a signal change occurs on the second signal line 12 .

[0049] It is understood that during a touch operation, when a user touches the touch area 10, the capacitance of the touch capacitance region 13 changes, thereby causing a change in the signal received by the second signal line 12. The timer accurately records this time difference, which serves as the basis for subsequent calculations and analysis. In subsequent calculations, combined with the division of the touch capacitance region 13 and the layout characteristics of the signal lines, the location of the touch point within the touch area 10 can be accurately determined.

[0050] Please refer to Figure 6 During a touch operation, the first signal line 11 transmits a signal at a specific frequency. This transmission method, unlike the traditional sequential transmission of excitation signals, utilizes a method that more efficiently covers the touch area 10. The second signal line 12 simultaneously receives signals. When the received signal strength is significantly lower than the transmitted signal strength, a touch operation is determined. When the signal on a particular second signal line 12 decreases, several possible suspected touch locations appear on that second signal line 12—for example, six are shown in the figure. The touch point is then determined by measuring the time difference between the signal change on the second signal line 12 and the signal transmitted by the first signal line 11. Specifically, the first signal line 11 transmits signals from the outside in, each revolution taking a different time. Starting from the outermost circle of the first signal line 11, the second signal line 12 performs six detections within a complete spiral revolution. The timing characteristics of the first signal line 11 are used to determine which suspected touch location is the actual touch point.

[0051] In this embodiment, for a touch area 10 with a larger radius, the number of spiral turns of the first signal line 11 is increased accordingly to ensure uniform signal coverage and reasonable division of the touch capacitance area 13; at the same time, the number of rays of the second signal line 12 is also appropriately increased to ensure that signals can be effectively received throughout the larger touch area 10.

[0052] Specifically, in an electronic device with a touch function, the entire touch circuit is set in its touch area 10, and the signal transmission control module and the timer can be placed in a suitable position near the main board of the electronic device, and connected to the first signal line 11 and the second signal line 12 through wiring to ensure that the signal transmission path is short and the interference is small.

[0053] Based on the above embodiments, this embodiment discloses an electronic device with a touch function, including a touch area 10 , in which the touch circuit as described above is disposed.

[0054] In this embodiment, the structure of the first signal line 11 and the second signal line 12 and their interaction greatly improves touch accuracy. When a touch occurs, the presence of each touch capacitance area 13 can accurately capture the capacitance change caused by the touch point, and then accurately determine the touch position through the time difference obtained by the timer. At the same time, the signal transmission control module controls the signal transmission frequency to ensure the stability and efficiency of signal transmission. The application of the touch circuit provided in this embodiment in a circular electronic device improves circuit utilization through reasonable circuit configuration and helps reduce the width of the "chin" area, thereby improving the reliability of the entire device.

[0055] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A touch circuit, characterized in that: Set in a touch area, including: a first signal circuit, the first signal circuit extending outward in a spiral shape starting from the center of the touch area; a second signal line, the second signal line radiating outwards in a radial shape from the center of the touch area; The first signal circuit and the second signal circuit are arranged in an overlapping manner, dividing the touch area into a plurality of touch capacitance areas.

2. The touch control circuit according to claim 1, wherein: The first signal line is a signal transmitting line, and the second signal line is a signal receiving line.

3. The touch control circuit according to claim 1, wherein: The line spacing of the first signal lines decreases from the middle toward the outside, so that the areas of the touch capacitance regions are equal.

4. The touch control circuit according to claim 1, wherein: The line spacings of the second signal lines are uniform.

5. The touch control circuit according to claim 1, wherein: Also included is a signal emission control module; The signal transmission control module is electrically connected to the first signal circuit, and is used to control the first signal circuit to transmit a signal at a predetermined frequency.

6. The touch control circuit according to claim 5, wherein: Also included is a timer, the timer being used to obtain a time difference between a moment when a signal is transmitted from the first signal line and a moment when a signal change occurs on the second signal line; The time difference is used to determine the touch location.

7. The touch control circuit according to claim 1, wherein: The intersection of the first signal line and the second signal line is welded.

8. The touch control circuit according to claim 1, wherein: The touch area is circular.

9. An electronic device with a touch function, characterized in that: The device comprises a touch area, wherein the touch circuit according to any one of claims 1 to 8 is provided in the touch area.

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