Pressure detection module and electronic equipment

Abstract

The embodiment of the invention provides a pressure detection module and electronic equipment. The pressure detection module comprises an identification unit, a flexible circuit board and a pressure detection unit, the second surface of the identification unit is electrically connected with the first surface of the flexible circuit board, the pressure detection unit is arranged on the second surface of the flexible circuit board, and the flexible circuit board is partially bent to enable the pressure detection unit to be opposite to the second surface of the identification unit; the recognition unit generates a sensing signal when the detection object presses the recognition area, and the sensing signal is used for feature recognition; when the detection object presses the identification area, the pressure detection unit emits a pressure detection signal to the direction where the identification unit is located and generates an identification signal according to a reflected signal which is reflected back, and the identification signal is used for pressing force detection. According to the pressure detection module provided by the embodiment of the invention, the pressing force can be detected while feature recognition is carried out, multiple user-defined functions can be set for different pressing forces, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of pressure detection, and in particular to a pressure detection module and an electronic device. BACKGROUND

[0002] Touch technology is a human-computer interaction method, and a user realizes interaction with an electronic device by touching or gesture operation on a touch area of the electronic device. With the development of smart devices, touch technology has become a mainstream operation method of electronic devices such as mobile phones. The electronic devices such as mobile phones receive touch instructions input by a user on a touch area, and identify corresponding touch operations according to the touch instructions.

[0003] At present, touch detection technology is integrated into various devices such as terminal devices such as mobile phones, vehicle-mounted touch keys, and sensing devices such as earphones.

[0004] However, the existing touch detection module has a single function, and can only detect touch operations of a user, and cannot realize different function expansions according to different pressing forces of the user. SUMMARY

[0005] Therefore, embodiments of the present application provide a pressure detection module and an electronic device to at least partially solve the above problems.

[0006] According to a first aspect of embodiments of the present application, a pressure detection module applied to an electronic device is provided, and the pressure detection module comprises an identification unit, a flexible circuit board, and a pressure detection unit. A second surface of the identification unit is electrically connected to a first surface of the flexible circuit board, and the pressure detection unit is arranged on a second surface of the flexible circuit board. The flexible circuit board is partially bent so that the pressure detection unit is opposite to the second surface of the identification unit. The first surface of the flexible circuit board is opposite to the second surface of the flexible circuit board. The identification unit is configured to generate a sensing signal when a detection object is pressed on an identification area, and the sensing signal is used for feature recognition. The pressure detection unit is configured to emit a pressure detection signal in a direction of the identification unit when the detection object is pressed on the identification area, and generate an identification signal according to a reflected signal reflected back, and the identification signal is used for pressing force detection.

[0007] In a possible implementation, the pressure detection module further comprises a first reinforcing plate and at least one support; the second surface of the first reinforcing plate is attached to the second surface of the flexible circuit board on which the identification unit is arranged, so that the first reinforcing plate is located between the identification unit and the pressure detection unit; the at least one support is arranged between the first reinforcing plate and the second surface of the flexible circuit board on which the pressure detection unit is arranged; the first reinforcing plate and / or the at least one support are / is configured to deform when the detection object presses on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes; the pressure detection unit is configured to emit the pressure detection signal to the first reinforcing plate when the detection object presses on the identification area, and generate the identification signal according to the reflected signal reflected by the first reinforcing plate.

[0008] In a possible implementation, the at least one support is made of hard material; the first reinforcing plate is configured to deform when the detection object presses on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes; or, the at least one support is made of soft material; the at least one support is configured to deform when the detection object presses on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes.

[0009] In a possible implementation, the pressure detection module further comprises a second reinforcing plate; the second surface of the second reinforcing plate is attached to the second surface of the flexible circuit board on which the pressure detection unit is arranged, and the first surface of the second reinforcing plate is opposite to the first reinforcing plate; the second reinforcing plate comprises a through hole, and the pressure detection unit is arranged in the through hole; the at least one support is arranged between the first reinforcing plate and the second reinforcing plate.

[0010] In a possible implementation, the pressure detection module further comprises a protective layer; the protective layer is arranged on the first surface of the second reinforcing plate, and covers the through hole, so that the pressure detection unit is arranged between the protective layer and the flexible circuit board.

[0011] In a possible implementation, the pressure detection signal and the reflected signal comprise light signals, and the protective layer comprises a light homogenizing plate.

[0012] In a possible implementation, the pressure detection unit is electrically connected to the flexible circuit board by conductive glue, or the pressure detection unit is electrically connected to the flexible circuit board by an electric connection line.

[0013] In a possible implementation, the pressure detection module further includes a first filling glue, the first filling glue is arranged in the through hole, and the pressure detection unit is located in the first filling glue; when the pressure detection unit is electrically connected with the flexible circuit board through the electric connection line, the electric connection line is located in the first filling glue.

[0014] In a possible implementation, the pressure detection module further includes a third reinforcing plate, a first surface of the third reinforcing plate is attached to a second surface of the flexible circuit board on which the pressure detection unit is arranged, and the third reinforcing plate is configured to provide rigid support for the flexible circuit board.

[0015] In a possible implementation, the pressure detection module further includes a second filling glue, a second surface of the identification unit is tin soldered to a first surface of the flexible circuit board, the second filling glue is arranged between the second surface of the identification unit and the first surface of the flexible circuit board, and the second filling glue is in contact with the second surface of the identification unit and the first surface of the flexible circuit board.

[0016] In a possible implementation, the pressure detection module further includes a physical button, a first surface of the physical button is electrically connected to a second surface of the flexible circuit board on which the pressure detection unit is arranged, so that the physical button is located between the pressure detection module and the electronic device, and the physical button is configured to generate button feedback when the detection object is pressed on the identification area.

[0017] In a possible implementation, the pressure detection unit includes a signal transmitting subunit and a signal receiving subunit, the signal transmitting subunit is configured to transmit the pressure detection signal, and the signal receiving subunit is configured to receive the reflected signal and generate an identification signal according to the reflected signal.

[0018] In a possible implementation, the pressure detection signal is an optical signal, the signal transmitting subunit includes a light-emitting diode, and the signal receiving subunit includes a photodiode.

[0019] According to a second aspect of the embodiments of the present application, an electronic device is provided, including the pressure detection module according to the first aspect of the embodiments of the present application.

[0020] In a possible implementation, the pressure detection module is arranged in a middle frame opening of the electronic device.

[0021] In a possible implementation, the electronic device further includes a cover layer, a second surface of the cover layer is attached to the pressure detection module, and a first surface of the cover layer is configured to provide the identification area, wherein the first surface of the cover layer is opposite to the second surface of the protective layer.

[0022] In a possible implementation, a thickness of the cover layer is less than or equal to 30 μm.

[0023] In a possible implementation, the electronic device further includes a cover plate, a second surface of the cover plate is attached to the pressure detection module, and a first surface of the cover plate is configured to provide the identification area, wherein the first surface of the cover plate is opposite to the second surface of the cover plate.

[0024] In a possible implementation, a thickness of the cover plate ranges from 0.15 mm to 2 mm.

[0025] According to the pressure detection module provided in the embodiments of the present application, the pressure detection module includes an identification unit, a flexible circuit board and a pressure detection unit, the identification unit is arranged on a first surface of the flexible circuit board, the pressure detection unit is arranged on a second surface of the flexible circuit board, the pressure detection unit is opposite to the second surface of the identification unit, the identification unit can generate a sensing signal when a detection object is pressed on the identification area, the pressure detection unit can generate an identification signal when the detection object is pressed on the identification area, the detection object can be identified according to the sensing signal, and the pressing strength of the detection object can be detected according to the identification signal, the pressure detection module can detect the pressing strength of the detection object while realizing the function of feature identification (such as touch identification and fingerprint identification), different functions can be realized according to different pressing strengths of the detection object, compared with the fingerprint module or the touch detection module in the prior art, multiple customized functions can be set according to different pressing strengths, the function expandability is high, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0027] Figure 1 is a cross-sectional view of a pressure detection module provided by the embodiments of the present application;

[0028] Figure 2 is a cross-sectional view of a pressure detection module including a first reinforcing plate provided by the embodiments of the present application;

[0029] Figure 3 is a cross-sectional view of a pressure detection module including a second reinforcing plate according to an embodiment of the disclosure;

[0030] Figure 4 is a cross-sectional view of a pressure detection module including a protective layer according to an embodiment of the disclosure;

[0031] Figure 5 is a cross-sectional view of a pressure detection unit according to an embodiment of the disclosure;

[0032] Figure 6 is a cross-sectional view of a pressure detection module including a first filling adhesive according to an embodiment of the disclosure;

[0033] Figure 7 is a cross-sectional view of a pressure detection module including a third reinforcing plate according to an embodiment of the disclosure;

[0034] Figure 8 is a cross-sectional view of a pressure detection module including a second filling adhesive according to an embodiment of the disclosure;

[0035] Figure 9 is a cross-sectional view of a pressure detection module including a physical button according to an embodiment of the disclosure;

[0036] Figure 10 is a cross-sectional view of another pressure detection unit according to an embodiment of the disclosure;

[0037] Figure 11 is a schematic view of an electronic device according to an embodiment of the disclosure;

[0038] Figure 12 is a schematic view of another electronic device according to an embodiment of the disclosure;

[0039] Figure 13 is a cross-sectional view of a pressure detection module including a cover layer according to an embodiment of the disclosure;

[0040] Figure 14 is a cross-sectional view of a pressure detection module including a cover plate according to an embodiment of the disclosure. DETAILED DESCRIPTION

[0041] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art shall fall within the scope of protection of the present application.

[0042] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this application and / or the appended claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0043] It should be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one piece of information from another piece of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon determination" or "in response to determining".

[0044] The pressure detection module and the electronic device provided by the present application are described below by way of examples.

[0045] Figure 1 is a cross-sectional view of a pressure detection module provided by an embodiment of the present application. The pressure detection module 100 is applied to an electronic device, such as a mobile phone. Figure 1 As shown in the figure, the pressure detection module 100 includes an identification unit 101, a flexible circuit board 102, and a pressure detection unit 103. The second surface of the identification unit 101 is electrically connected to the first surface of the flexible circuit board 102. The pressure detection unit 103 is arranged on the second surface of the flexible circuit board 102. The flexible circuit board 102 is partially bent so that the pressure detection unit 103 is opposite to the second surface of the identification unit 101. The flexible circuit board 102 is electrically connected to a processing unit of the electronic device. The first surface of the flexible circuit board 102 is opposite to the second surface of the flexible circuit board 102.

[0046] The recognition unit 101 can generate a sensing signal when detecting an object pressing on the recognition area, and the sensing signal is used for feature recognition. The pressure detection unit 103 can emit a pressure detection signal in the direction of the recognition unit 101 when detecting an object pressing on the recognition area, and generate a recognition signal according to the reflected signal reflected back, and the recognition signal is used for pressing force detection.

[0047] The recognition unit 101 is arranged on the first surface of the flexible circuit board 102 (Flexible Printed Circuit, FPC), and it should be understood that the flexible circuit board 102 can be bent, such as Figure 1 As shown, after the flexible circuit board 102 is partially bent, the second surface opposite to the first surface of the flexible circuit board 102 on which the recognition unit 101 is arranged is opposite to the second surface of the flexible circuit board 102 on which the pressure detection unit 103 is arranged, so that the pressure detection unit 103 is opposite to the second surface of the recognition unit 101 after the flexible circuit board 102 is partially bent.

[0048] The pressure detection unit 103 can emit a pressure detection signal in the direction of the recognition unit 101, and the pressure detection signal can be an optical signal (for example: infrared), an ultrasonic signal, etc. After the pressure detection signal is reflected by part of the structure in the pressure detection module 100, a reflected signal is formed. The pressure detection unit 103 receives the reflected signal and generates a recognition signal according to the reflected signal. Optionally, when the pressure detection signal is an optical signal, the reflected signal is also an optical signal, and the pressure detection unit 103 can convert the optical signal into a current signal (recognition signal).

[0049] Optionally, the feature recognition can be fingerprint recognition, touch recognition, etc. That is, the recognition unit 101 can be a fingerprint module, a touch detection module, etc. According to the different recognition units 101, the sensing signal can be a fingerprint sensing signal, a touch sensing signal, etc. Specifically, when the recognition unit 101 is a fingerprint module, after the detection object presses on the recognition area, the fingerprint module can collect the fingerprint information of the detection object and generate a fingerprint sensing signal according to the fingerprint information, and the fingerprint sensing signal is used for fingerprint recognition. When the recognition unit 101 is a touch detection module, after the detection object presses on the recognition area, the touch operation (for example: pressing, sliding, etc.) of the user can be recognized, and a touch sensing signal is generated according to the touch operation of the user, and the touch sensing signal is used for touch recognition.

[0050] Optionally, the feature recognition chip and the pressure detection chip can be integrated in the recognition unit 101. When the recognition unit 101 generates the sensing signal, the feature recognition chip integrated in the recognition unit 101 can determine the feature recognition result according to the sensing signal. For example, the fingerprint chip can be integrated in the recognition unit 101, and the fingerprint chip can perform fingerprint recognition according to the fingerprint sensing signal to determine the fingerprint recognition result. Alternatively, the touch chip can be integrated in the recognition unit 101, and the touch chip can perform touch recognition according to the touch sensing signal to determine the touch recognition result. When the pressure detection unit 103 generates the recognition signal according to the reflection signal, the recognition signal can be transmitted to the pressure detection chip in the recognition unit 101 through the flexible circuit board 102, and the pressure detection chip can determine the pressure detection result according to the recognition signal. After the feature recognition result and the pressure detection result are determined, the feature recognition result and the pressure detection result can be transmitted to the processing unit of the electronic device through the flexible circuit board 102. The processing unit is a chip with processing function in the electronic device, for example, the processor of the electronic device. The processing unit can perform corresponding functions according to the feature recognition result, such as fingerprint unlocking, touch sliding, etc., and can implement corresponding functions according to the pressure detection result, such as focusing function when the pressing force is light, shutter function when the pressing force is heavy, or pop-up menu function when the pressing force is light, and pop-up menu function when the pressing force is heavy.

[0051] Optionally, when the feature recognition chip and the pressure detection chip are not integrated in the pressure detection module 100, the pressure detection module 100 can transmit the sensing signal and the recognition signal to the processing unit in the electronic device through the flexible circuit board 102, or to the feature recognition chip or the pressure detection chip arranged in the electronic device. The processing unit or the specific chip in the electronic device can perform corresponding detection and execute corresponding functions according to the sensing signal and the recognition signal.

[0052] In an embodiment of the present application, the pressure detection module 100 includes an identification unit 101, a flexible circuit board 102 and a pressure detection unit 103. The identification unit 101 is arranged on the first surface of the flexible circuit board 102, and the pressure detection unit 103 is arranged on the second surface of the flexible circuit board 102. The pressure detection unit 103 is opposite to the second surface of the identification unit 101. The identification unit 101 can generate a sensing signal when the detection object presses on the recognition area. The pressure detection unit 103 can generate a recognition signal when the detection object presses on the recognition area. The detection object can be feature-identified based on the sensing signal, and the pressure of the detection object can be detected based on the recognition signal. The pressure detection module 100 can detect the pressure of the detection object while realizing feature recognition functions (touch recognition, fingerprint recognition, etc.), thereby realizing different functions according to the different pressures of the detection object. Compared with the fingerprint module or touch detection module in the prior art, multiple custom functions can be set for different pressures, with high functional expandability, improving user experience.

[0053] Figure 2 is a cross-sectional schematic diagram of a pressure detection module including a first reinforcement plate provided in an embodiment of the present application, such as Figure 2 As shown, the pressure detection module 100 also includes a first reinforcement plate 104 and at least one support member 105. The first reinforcement plate 104 is bonded to the second surface of the flexible circuit board 102 opposite to the first surface on which the identification unit 101 is provided, so that the first reinforcement plate 104 is located between the identification unit 101 and the pressure detection unit 103, and at least one support member 105 is provided between the first reinforcement plate 104 and the second surface of the flexible circuit board 102 on which the pressure detection unit 103 is provided.

[0054] The first reinforcement plate 104 and / or at least one support member 105 can be deformed when the detection object presses on the identification area, causing the distance between the first reinforcement plate 104 and the pressure detection unit 103 to change. The pressure detection unit 103 can transmit a pressure detection signal to the first reinforcement plate 104 when the detection object presses on the identification area, and generate an identification signal based on the reflected signal reflected back by the first reinforcement plate 104.

[0055] For example, the pressure detection signal emitted by the pressure detection unit 103 is an infrared signal. When the detection object is not pressed on the recognition area, the distance between the first reinforcing plate 104 and the pressure detection unit 103 is fixed. When the detection object is pressed on the recognition area, at least one of the first reinforcing plate 104 and the at least one support 105 is deformed, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes. The pressure detection unit 103 emits an infrared signal (pressure detection signal) to the first reinforcing plate 104 and receives the infrared signal (reflected signal) reflected by the first reinforcing plate 104. The recognition signal is generated according to the reflected infrared signal. The distance between the pressure detection unit 103 and the first reinforcing plate 104 can be determined according to the signal amount of the recognition signal, so that the pressing degree of the detection object can be determined according to the distance. In an example, a corresponding relationship between the distance and the pressing degree can be set, and different distances correspond to different pressing degrees of the detection object, so that the pressing degree of the detection object can be determined according to the distance.

[0056] It should be noted that the above example is only an illustrative example, and should not limit the present application. For example, the pressure detection signal emitted by the pressure detection unit 103 can also be an ultrasonic signal. For another example, the distance detection signal can be emitted when the detection object is not pressed on the recognition area, and the pressure detection signal can be emitted when the detection object is pressed on the recognition area. According to the signal amount change of the reflected signal before and after the detection object is pressed on the recognition area, the distance change amount between the first reinforcing plate 104 and the pressure detection unit 103 is determined, and the pressing degree of the detection object is determined according to the corresponding function between the distance change amount and the pressing degree.

[0057] In the embodiment of the present application, the pressure detection module 100 further includes the first reinforcing plate 104 and the at least one support 105. The first surface of the first reinforcing plate 104 is attached to the second surface of the flexible circuit board 102 opposite to the first surface on which the recognition unit 101 is arranged. The first support 105 is arranged between the first reinforcing plate 104 and the second surface of the flexible circuit board 102 on which the pressure detection unit 103 is arranged. When the detection object is pressed on the recognition area, at least one of the first reinforcing plate 104 and the at least one support 105 is deformed, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes. Therefore, the pressing degree of the detection object can be determined according to the distance between the first reinforcing plate 104 and the pressure detection unit 103, and the pressure detection function is realized.

[0058] In a possible implementation, the at least one support 105 is made of hard material, and the first reinforcing plate 104 can be deformed when the detected object presses on the identification area, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes, or the at least one support 105 is made of soft material, and the at least one support 105 can be deformed when the detected object presses on the identification area, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes.

[0059] The first reinforcing plate 104 can be a steel plate, and when the at least one support 105 is made of hard material, the at least one support 105 can be made of hard plastic, metal material, or the like, and when the detected object presses on the identification area, the first reinforcing plate 104 is plastically deformed, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes, and when the at least one support 105 is made of soft material, the at least one support plate can be made of foam, and when the detected object presses on the identification area, the at least one support plate is plastically deformed, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes.

[0060] It should be noted that when the at least one support 105 is made of soft material, if the pressing force of the detected object is large, the first reinforcing plate 104 and the at least one support 105 can be deformed at the same time, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes.

[0061] In the embodiment of the present application, the at least one support 105 is made of hard material, and the first reinforcing plate 104 can be deformed when the detected object presses on the identification area, or the at least one support 105 is made of soft material, and the at least one support 105 can be deformed when the detected object presses on the identification area, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes, thereby the distance between the first reinforcing plate 104 and the pressure detection unit 103 can be determined according to the distance between the first reinforcing plate 104 and the pressure detection unit 103, so that the pressing force of the detected object can be determined, and the pressure detection function is realized.

[0062] Figure 3 is a cross-sectional view of a pressure detection module including a second reinforcing plate provided by the embodiment of the present application, as shown in Figure 3As shown, the pressure detection module 100 further comprises a second reinforcing plate 106, a second surface of the second reinforcing plate 106 is attached to the second surface of the flexible circuit board 102 on which the pressure detection unit 103 is arranged, a first surface of the second reinforcing plate 106 is opposite to the first reinforcing plate 104, the second reinforcing plate 106 comprises a through hole 1061, the pressure detection unit 103 is arranged in the through hole 1061, and the at least one supporting piece 105 is arranged between the first reinforcing plate 104 and the second reinforcing plate 106.

[0063] In the embodiment of the present application, the pressure detection module 100 further comprises the second reinforcing plate 106, the second reinforcing plate 106 can provide rigid support for the second surface of the flexible circuit board 102 on which the pressure detection unit 103 is arranged, and the at least one supporting piece 105 is arranged between the first reinforcing plate 104 and the second reinforcing plate 106. When the detection object presses on the identification area, the second reinforcing plate 106 can support the at least one supporting piece 105, so that at least one of the first reinforcing plate 104 and the at least one supporting piece 105 is deformed under the pressing of the detection object and the support of the second reinforcing plate 106, so that the distance between the first reinforcing plate 104 and the pressure detection unit 103 changes, thereby the pressing degree of the detection object can be determined according to the distance between the first reinforcing plate 104 and the pressure detection unit 103, and the pressure detection function is realized.

[0064] Figure 4 is a cross-sectional view of a pressure detection module provided by an embodiment of the present application and comprising a protective layer, as Figure 4 As shown, the pressure detection module 100 further comprises a protective layer 107, the protective layer 107 is arranged on the first surface of the second reinforcing plate 106, and the protective layer 107 covers the through hole 1061, so that the pressure detection unit 103 is arranged between the protective layer 107 and the flexible circuit board 102.

[0065] Since the pressure detection unit 103 is arranged in the through hole 1061 of the second reinforcing plate 106, in order to prevent the external environment from affecting the pressure detection unit 103, the protective layer 107 can be arranged, and optionally, when the pressure detection signal emitted by the pressure detection unit 103 is an optical signal, the protective layer 107 can be made of a light-transmitting material, and optionally, when the pressure detection signal and the reflection signal are optical signals, the protective layer 107 comprises a light homogenizing plate.

[0066] In the embodiment of the present application, the pressure detection module 100 further comprises the protective layer 107, the protective layer 107 is arranged on the first surface of the second reinforcing plate 106, and the protective layer 107 covers the through hole 1061, so that the pressure detection unit 103 is arranged between the protective layer 107 and the flexible circuit board 102, the pressure detection unit 103 can be isolated from the external environment, the influence of the external environment on the pressure detection unit 103 can be prevented, and the reliability of the pressure detection module 100 can be improved.

[0067] In a possible implementation, the pressure detection signal and the reflection signal comprise optical signals.

[0068] Optionally, the pressure detection signal can be an infrared signal.

[0069] In the embodiment of the present application, the pressure detection signal emitted by the pressure detection unit 103 is an optical signal. The pressure detection unit 103 emits the optical signal to the direction where the identification unit 101 is located and receives the reflected optical signal, so as to generate the identification signal according to the reflected optical signal, thereby detecting the pressing force according to the identification signal. Since the emission structure and the receiving structure of the optical signal are relatively simple, the optical signal as the pressure detection signal can simplify the pressure detection structure and reduce the cost.

[0070] Figure 5 is a cross-sectional view of a pressure detection unit provided by the embodiment of the present application. As shown in Figure 5 , the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the conductive glue 201, or the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the electric connection line 202.

[0071] Figure 5 (a) in FIG. 1 shows that the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the conductive glue 201. In an example, the conductive glue 201 can be conductive silver glue or anisotropic conductive film (ACF), Figure 5 (b) in FIG. 1 shows that the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the electric connection line 202. In an example, the electric connection line 202 can be a bonding line.

[0072] In the embodiment of the present application, the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the conductive glue 201, or the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the electric connection line 202, so as to realize the electrical connection between the pressure detection unit 103 and the flexible circuit board 102. The pressure detection unit 103 can be driven to emit the pressure detection signal under the driving of the driving signal transmitted by the flexible circuit board 102, and the identification signal can be transmitted to the processing unit through the flexible circuit board 102.

[0073] Figure 6 is a cross-sectional view of a pressure detection module including a first filling glue provided by the embodiment of the present application. As shown in Figure 6As shown, the pressure detection module 100 further comprises a first filling glue 1062, the first filling glue 1062 is arranged in the through hole 1061, and the pressure detection unit 103 is located in the first filling glue 1062. When the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the electric connection line 202, the electric connection line 202 is located in the first filling glue 1062.

[0074] It should be noted that when the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the conductive glue 201, since the pressure detection unit 103 is located in the first filling glue 1062, the conductive glue 201 arranged between the pressure detection unit 103 and the flexible circuit board 102 is also located in the first filling glue 1062.

[0075] In the embodiment of the present application, the pressure detection module 100 further comprises a first filling glue 1062, the first filling glue 1062 is arranged in the through hole 1061 of the second reinforcing plate 106, and the pressure detection unit 103 is located in the first filling glue 1062. When the pressure detection unit 103 is electrically connected with the flexible circuit board 102 through the electric connection line 202, the electric connection line 202 is located in the first filling glue 1062, so that the pressure detection unit 103 can be protected by the first protective glue, preventing the pressure detection unit 103 from being oxidized, and preventing the pressure detection unit 103 from being disconnected from the electrically connected state with the flexible circuit board 102, thereby improving the reliability of the pressure detection module 100.

[0076] Figure 7 is a cross-sectional view of a pressure detection module provided by an embodiment of the present application, which comprises a third reinforcing plate, as shown in Figure 7 As shown, the pressure detection module 100 further comprises a third reinforcing plate 108, the first surface of the third reinforcing plate 108 is attached to the second surface of the flexible circuit board 102 opposite to the surface on which the pressure detection unit 103 is arranged, and the third reinforcing plate 108 can provide rigid support for the flexible circuit board 102.

[0077] In the embodiment of the present application, the pressure detection module 100 further comprises a third reinforcing plate 108, the first surface of the third reinforcing plate 108 is attached to the second surface of the flexible circuit board 102 opposite to the surface on which the pressure detection unit 103 is arranged. When the pressure detection module 100 is arranged on the electronic device, the third reinforcing plate 108 is located between the pressure detection module 100 and the electronic device, and can provide rigid support for the flexible circuit board 102 and the pressure detection module 100.

[0078] Figure 8 is a cross-sectional view of a pressure detection module provided by an embodiment of the present application, which comprises a second filling glue, as shown in Figure 8As shown, the pressure detection module 100 further includes a second filling glue 109, the second surface of the identification unit 101 and the first surface of the flexible circuit board 102 are tin soldered and electrically connected, the second filling glue 109 is arranged between the second surface of the identification unit 101 and the first surface of the flexible circuit board 102, and the second filling glue 109 is in contact with the second surface of the identification unit 101 and the first surface of the flexible circuit board 102.

[0079] In an example, when the second filling glue 109 is filled between the second surface of the identification unit 101 and the first surface of the flexible circuit board 102, the second filling glue 109 exceeds the edge of the identification unit 101, that is, in the direction perpendicular to the second filling glue 109, the projection of the identification unit 101 on the second filling glue 109 is located within the edge of the second filling glue 109.

[0080] Optionally, as Figure 8 shown, when the second filling glue 109 is filled between the second surface of the identification unit 101 and the first surface of the flexible circuit board 102, the solder tin of the tin soldered and electrically connected between the identification unit 101 and the flexible circuit board 102 is located within the second filling glue 109.

[0081] In the embodiment of the present application, the second surface of the identification unit 101 and the first surface of the flexible circuit board 102 are tin soldered and electrically connected, which realizes the electrical connection between the identification unit 101 and the flexible circuit board 102, so that the identification unit 101 can send the sensing signal to the processing unit through the flexible circuit board 102, and the processing unit can perform feature identification (for example, fingerprint identification, touch identification, etc.) on the detection object based on the sensing signal. The pressure detection module 100 further includes the second filling glue 109, which can protect the electrical connection area between the identification unit 101 and the flexible circuit board 102, can prevent the influence of the external environment, and can prevent the identification unit 101 and the flexible circuit board 102 from being disconnected under external force, thereby improving the reliability of the pressure detection module 100.

[0082] Figure 9 is a cross-sectional view of a pressure detection module including a physical key provided by an embodiment of the present application, as Figure 9 shown, the pressure detection module 100 further includes a physical key 110, the physical key 110 is electrically connected with the first surface of the flexible circuit board 102 opposite to the second surface on which the pressure detection unit 103 is arranged, and the physical key 110 is located between the pressure detection module 100 and the electronic device, and the physical key 110 is at least used to generate a key feedback when the detection object is pressed on the identification area.

[0083] The pressure detection module 100 can further include the physical key 110, and the physical key 110 is electrically connected with the flexible circuit board 102. In an example, as Figure 9As shown, the physical button 110 is arranged in a through hole on the third reinforcing plate 108, and the physical button 110 is electrically connected to the flexible circuit board 102 by soldering. Optionally, the physical button 110 can be a dome key.

[0084] The physical button 110 can at least generate a button feedback when the detection object presses the identification area. Specifically, when the detection object presses the identification area, the physical button 110 is triggered to provide the detection object with a button feedback, so that the detection object can feel the touch of the physical button 110. Optionally, the physical button 110 can also realize a multi-level pressing function. For example, taking a photograph function as an example, when the pressure detection module 100 detects that the detection object presses the identification area, the focusing function is realized, and when the physical button 110 is triggered, the shutter function is realized. Taking a menu function as an example, when the pressure detection module 100 detects that the detection object presses the identification area, a first-level menu function is realized, and when the physical button 110 is triggered, a second-level menu function is realized, and so on. The specific function can be set as needed.

[0085] In the embodiment of the present application, the pressure detection module 100 further includes a physical button 110, which is electrically connected to the flexible circuit board 102 and located between the pressure detection module 100 and the electronic device. The physical button 110 can at least provide the detection object with a button feedback, which can improve the user experience of using the pressure detection module 100. In addition, the physical button 110 can realize a multi-level pressing function of the pressure detection module 100, has high functional expandability, can set multiple custom functions, and improves the user experience.

[0086] Figure 10 is another cross-sectional view of a pressure detection unit provided by the embodiment of the present application, as shown in Figure 10 As shown, the pressure detection unit 103 includes a signal transmitting sub-unit 1031 and a signal receiving sub-unit 1032. The signal transmitting sub-unit 1031 is configured to transmit a pressure detection signal, and the signal receiving sub-unit 1032 is configured to receive a reflected signal and generate an identification signal according to the reflected signal.

[0087] As shown in Figure 10 The pressure detection unit 103 in the pressure detection module 100 includes a signal transmitting sub-unit 1031 and a signal receiving sub-unit 1032. The signal transmitting sub-unit 1031 and the signal receiving sub-unit 1032 are respectively electrically connected to the flexible circuit board 102. The signal transmitting sub-unit 1031 can transmit a pressure detection signal in the direction of the identification unit 101, for example: Figure 10The pressure detection signal is reflected by the first reinforcing plate 104 to form a reflected signal, the signal receiving sub-unit 1032 receives the reflected signal, and generates an identification signal according to the reflected signal, and sends the identification signal to the processing unit through the flexible circuit board 102, so that the processing unit detects the pressing force degree according to the identification signal.

[0088] Specifically, as shown in Figure 10 When the detection object presses on the identification area, the signal emitting sub-unit 1031 can emit a pressure detection signal to the direction where the identification unit 101 is located, the pressure detection signal is reflected by the flexible circuit board 102 and / or the device arranged on the flexible circuit board 102, such as the first reinforcing plate 104, the protective layer 107, etc., to form a reflected signal into the signal receiving sub-unit 1032, and the signal receiving sub-unit 1032 generates an identification signal. In an example, the time difference can be determined according to the time when the signal emitting sub-unit 1031 emits the pressure detection signal and the time when the signal receiving sub-unit 1032 generates the identification signal, and the pressing force degree of the detection object is determined according to the relationship table of the time difference and the pressing force degree, or the relationship function of the time difference and the pressing force degree. In another example, the distance between the signal emitting sub-unit 1031 and the first reinforcing plate 104 can be determined according to the identification signal, so as to determine the pressing force degree of the detection object according to the distance between the signal emitting sub-unit 1031 and the first reinforcing plate 104.

[0089] Optionally, the signal emitting sub-unit 1031 can be a light emitting diode (LED), which can emit an infrared signal, and the signal receiving sub-unit 1032 can be a photodiode (PD) for receiving the infrared signal and generating an identification signal according to the signal strength of the infrared signal. The identification signal can be a current signal.

[0090] In the embodiment of the present application, the pressure detection unit 103 includes a signal emitting sub-unit 1031 and a signal receiving sub-unit 1032, which can emit a pressure detection signal through the signal emitting sub-unit 1031, receive a reflected signal through the signal receiving sub-unit 1032 and generate an identification signal according to the reflected signal, to realize the detection of the pressing force degree.

[0091] Figure 11 is a schematic diagram of an electronic device provided by an embodiment of the present application, as shown in Figure 11 The electronic device 300 includes the pressure detection module 100 in any of the above embodiments.

[0092] Optionally, as shown in Figure 11As shown, the electronic device 300 further includes a processing unit 301, which can perform corresponding operations according to the feature recognition result sent by the pressure detection module 100 and the pressure detection result. Alternatively, when the processing unit receives the sensing signal sent by the pressure detection module 100, the feature recognition of the detection object can be performed, for example, the fingerprint recognition of the detection object, the touch recognition of the touch operation of the detection object, and the like. When the processing unit receives the recognition signal sent by the pressure detection module 100, the pressing force of the detection object can be detected according to the recognition signal. The processing unit is a chip with processing function in the electronic device, for example, a processor of the electronic device or a pressure detection chip of the electronic device, and the like. The processing unit can detect the pressing force of the detection object according to the recognition signal, and realize corresponding functions according to the detected pressing force, for example, taking the photographing function as an example, the focusing function can be realized when the pressing force is light, and the shutter function can be realized when the pressing force is heavy. Taking the menu function as an example, the first-level menu function can be realized when the pressing force is light, and the second-level menu function can be realized when the pressing force is heavy.

[0093] It should be noted that the pressure detection module 100 in the embodiments of the present application can be the pressure detection module 100 in any of the above embodiments, and specific details can be referred to the description in the above embodiments.

[0094] In the embodiments of the present application, the electronic device 300 includes the pressure detection module 100. Since the feature recognition (touch recognition and fingerprint recognition) is realized by the pressure detection module 100, the pressing force of the detection object is detected, so that different functions can be realized according to the different pressing forces of the detection object, and the function expansion is high. A plurality of custom functions can be set for different pressing forces, and the user experience is improved.

[0095] Figure 12 is another schematic diagram of an electronic device provided in the embodiments of the present application, as Figure 12 As shown, the pressure detection module 100 is arranged in the opening of the middle frame 302 of the electronic device 300.

[0096] In the embodiments of the present application, the pressure detection module 100 is arranged in the opening of the middle frame 302 of the electronic device 300, so that the pressure detection module 100 is arranged in the electronic device 300, the user can press the recognition area of the pressure detection module 100, and the pressure detection module 100 has high function expansion (for example, when the electronic device 300 is a mobile phone, the user can realize the shutter or zoom function on the pressure detection module 100 by different pressing forces, and can realize the multi-level menu function on the mobile phone by different pressing forces), and the user experience can be improved.

[0097] It should be understood that the embodiments of the present application do not limit the electronic device, and do not limit the application function of the pressure detection module. For example, the electronic device can also be a headset, and the pressure detection module is used to realize song switching, noise reduction function switching and the like according to different pressing forces of the user. The electronic device can also be a vehicle-mounted key, and the pressure detection module is used to realize vehicle control according to different pressing forces of the user, and the like.

[0098] Figure 13 is a cross-sectional view of a pressure detection module including a cover layer provided by an embodiment of the present application, as shown in Figure 13 The electronic device 300 further includes a cover layer 303, a second surface of the cover layer 303 is attached to the pressure detection module 100, and a first surface of the cover layer 303 is used to provide an identification area, wherein the first surface of the cover layer 303 is opposite to the second surface of the cover layer 303.

[0099] The pressure detection module 100 can be provided with a cover layer 303, and the cover layer 303 can be arranged on the outer surface of the pressure detection module 100. In an example, the cover layer 303 can be an ink layer. Optionally, different colors of the cover layer 303 can be arranged according to the color of the electronic device 300, to realize the uniformity of the appearance.

[0100] In the embodiments of the present application, the electronic device 300 further includes a cover layer 303, a second surface of the cover layer 303 is attached to the pressure detection module 100, and a first surface of the cover layer 303 is used to provide an identification area. Thus, the pressure detection module 100 can be protected by the cover layer 303, and the identification area can be provided, the reliability of the pressure detection module 100 is improved, and different colors of the cover layer 303 can be arranged according to the color of the electronic device 300, to ensure the uniformity of the appearance of the electronic device 300.

[0101] In a possible implementation, the thickness of the cover layer 303 is less than or equal to 30 μm.

[0102] In the embodiments of the present application, the thickness of the cover layer 303 is less than or equal to 30 μm. Thus, while the pressure detection module 100 is protected by the cover layer 303, the amount of the sensing signal generated by the identification unit in the pressure detection module 100 when the detection object is pressed on the identification area can be prevented from being small due to the arrangement of the cover layer 303. The reliability of the pressure detection module 100 can be improved while the feature identification function of the pressure detection module 10 is not affected.

[0103] Figure 14 is a cross-sectional view of a pressure detection module including a cover layer provided by an embodiment of the present application, as shown in Figure 14As shown, the electronic device 300 further includes a cover plate 304, a second surface of the cover plate 304 is attached to the pressure detection module 100, and a first surface of the cover plate 304 is used to provide the identification area, wherein the first surface of the cover plate 304 is opposite to the second surface of the cover plate 304.

[0104] The electronic device 300 can further include a cover plate 304, a second surface of the cover plate 304 is in contact with the pressure detection module 100, and in an example, the second surface of the cover plate 304 can be bonded to an outer surface of the pressure detection module 100. Optionally, the cover plate 304 can be made of plastic, glass, sapphire and the like, and the color of the cover plate 304 can be set as needed.

[0105] In the embodiments of the present application, the electronic device 300 can further include a cover plate 304, which can protect the pressure detection module 100 and provide the identification area, so that the pressure detection module 100 can be protected by the cover plate, and the reliability of the pressure detection module 100 can be improved.

[0106] In a possible implementation, the thickness of the cover plate 304 ranges from 0.15mm to 2mm.

[0107] Preferably, when the cover plate 304 is made of plastic, the thickness of the cover plate 304 ranges from 1mm to 2mm, and when the cover plate 304 is made of glass and sapphire, the thickness of the cover plate 304 ranges from 0.15mm to 0.2mm.

[0108] In the embodiments of the present application, the thickness of the cover plate 304 ranges from 0.15mm to 2mm, so that the pressure detection module 100 can be protected, and at the same time, the amount of the sensing signal generated by the identification unit of the pressure detection module 100 when the detection object presses on the identification area can be prevented from being small due to the presence of the cover plate 304, so that the reliability of the pressure detection module 100 can be improved without affecting the feature identification of the pressure detection module 100.

[0109] Those skilled in the art can appreciate that the units and method steps of the examples described in combination with the embodiments disclosed herein can be implemented in electronic hardware or in combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present application.

[0110] The above embodiments are only used for describing the present application, and are not intended to limit the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions belong to the scope of the present application, and the patent protection scope of the present application should be defined by the claims.

Claims

1. A pressure detection module applied to an electronic device, characterized in that, The pressure detection module comprises an identification unit, a flexible circuit board and a pressure detection unit; A second surface of the identification unit is electrically connected to a first surface of the flexible circuit board, the pressure detection unit is arranged on a second surface of the flexible circuit board, and the flexible circuit board is partially bent to make the pressure detection unit opposite to the second surface of the identification unit, wherein the first surface of the flexible circuit board is opposite to the second surface of the flexible circuit board; The identification unit is configured to generate a sensing signal when a detection object is pressed on the identification area, and the sensing signal is used for feature recognition. The pressure detection unit is configured to emit a pressure detection signal to the direction of the identification unit when the detection object is pressed on the identification area, and generate an identification signal according to a reflected signal reflected back, and the identification signal is used for pressing force detection.

2. The pressure detection module according to claim 1, wherein The pressure detection module further comprises a first reinforcing plate and at least one support. The first reinforcing plate is attached to a second surface of the flexible circuit board opposite to the first surface on which the identification unit is arranged, so that the first reinforcing plate is located between the identification unit and the pressure detection unit, and the at least one support is arranged between the first reinforcing plate and a second surface of the flexible circuit board on which the pressure detection unit is arranged. The first reinforcing plate and / or the at least one support are configured to deform when the detection object is pressed on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes. The pressure detection unit is configured to emit the pressure detection signal to the first reinforcing plate when the detection object is pressed on the identification area, and generate the identification signal according to the reflected signal reflected back by the first reinforcing plate.

3. The pressure detection module of claim 2, wherein: The at least one support is made of hard material. The first reinforcing plate is configured to deform when the detection object is pressed on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes. Alternatively, the at least one support is made of soft material. The at least one support is configured to deform when the detection object is pressed on the identification area, so that the distance between the first reinforcing plate and the pressure detection unit changes.

4. The pressure detection module of claim 2, wherein, The pressure detection module further comprises a second reinforcing plate. A second surface of the second reinforcing plate is attached to a second surface of the flexible circuit board on which the pressure detection unit is arranged, a first surface of the second reinforcing plate is opposite to the first reinforcing plate, the second reinforcing plate comprises a through hole, the pressure detection unit is arranged in the through hole, and the at least one support is arranged between the first reinforcing plate and the second reinforcing plate.

5. The pressure detection module according to claim 4, wherein The pressure detection module further comprises a protective layer. The protective layer is arranged on the first surface of the second reinforcing plate, and covers the through hole, so that the pressure detection unit is arranged between the protective layer and the flexible circuit board.

6. The pressure detection module according to claim 1, characterized in that: The pressure detection signal and the reflected signal comprise light signals.

7. The pressure detection module of claim 4, wherein, The pressure detection unit is electrically connected with the flexible circuit board through conductive glue, or the pressure detection unit is electrically connected with the flexible circuit board through an electric connection line.

8. The pressure detection module according to claim 7, wherein The pressure detection module further comprises a first filling glue. The first filling glue is arranged in the through hole, and the pressure detection unit is located in the first filling glue. When the pressure detection unit is electrically connected with the flexible circuit board through an electric connection line, the electric connection line is located in the first filling glue.

9. The pressure detection module of claim 1, wherein, The pressure detection module further comprises a third reinforcing plate. The first surface of the third reinforcing plate opposite to the second surface of the flexible circuit board on which the pressure detection unit is arranged is attached. The third reinforcing plate is used for providing rigid support for the flexible circuit board.

10. The pressure detection module of claim 1, wherein, The pressure detection module further comprises a second filling glue. The second surface of the identification unit is tin soldered and electrically connected with the first surface of the flexible circuit board, the second filling glue is arranged between the second surface of the identification unit and the first surface of the flexible circuit board, and the second filling glue is in contact with the second surface of the identification unit and the first surface of the flexible circuit board.

11. The pressure detection module of claim 1, wherein, The pressure detection module further comprises a physical button. The physical button is electrically connected with the first surface of the flexible circuit board opposite to the second surface of the flexible circuit board on which the pressure detection unit is arranged, so that the physical button is located between the pressure detection module and the electronic device. The physical button is used at least for generating button feedback when the detection object is pressed on the identification area.

12. The pressure detection module according to any one of claims 1-11, wherein, The pressure detection unit comprises a signal transmitting subunit and a signal receiving subunit. The signal transmitting subunit is used for transmitting the pressure detection signal. The signal receiving subunit is used for receiving the reflected signal and generating the identification signal according to the reflected signal.

13. The pressure detection module of claim 12, wherein, The pressure detection signal is an optical signal, the signal transmitting subunit comprises a light emitting diode, and the signal receiving subunit comprises a photodiode.

14. An electronic device, comprising: Comprise: The pressure detection module according to any one of claims 1-13.

15. The electronic device of claim 14, wherein, The pressure detection module is arranged in a middle frame opening of the electronic device.

16. The electronic device of claim 15, wherein, The electronic device further comprises a cover layer. The second surface of the cover layer is attached with the pressure detection module, and the first surface of the cover layer is used for providing an identification area, wherein the first surface of the cover layer is opposite to the second surface of the cover layer.

17. The electronic device of claim 16, wherein, The thickness of the cover layer is less than or equal to 30 μm.

18. The electronic device of claim 15, wherein, The electronic device further comprises a cover plate. The second surface of the cover plate is attached with the pressure detection module, and the first surface of the cover plate is used for providing an identification area, wherein the first surface of the cover plate is opposite to the second surface of the cover plate.

19. The electronic device of claim 18, wherein, The thickness of the cover plate ranges from 0.15 mm to 2 mm.

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