FPC key circuit and display

Abstract

The utility model discloses an FPC key circuit and a display. The FPC key circuit comprises a master control module, a switching module, a control module and a film key module, one end of the switching module is connected with the main control module, and the other end of the switching module is provided with a spring thimble; one end of the control module is connected with the switching module through the spring ejector pin; and the film key module is connected with the other end of the control module. The thickness of the display can be reduced by reducing the requirement of the keyboard on the thickness of the display, and the requirement of a user on an ultra-thin display is met.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC keys, in particular to an FPC key circuit and a display. Background Art

[0002] With the development of monitors, there are more and more types of monitors, such as ultra-thin monitors. Ultra-thin monitors are designed to reduce the thickness of the monitor as much as possible to meet the needs of users for ultra-thin monitors. Currently, most ultra-thin monitors use PCB keypads, which means that their thickness cannot be further reduced and cannot meet the demand for thinner monitors. Utility Model Content

[0003] The FPC key circuit and display provided by the utility model are intended to solve the problem that the current ultra-thin display cannot meet the demand for thinner displays.

[0004] In the first aspect, the utility model provides an FPC key circuit, which includes a main control module, an adapter module, a control module and a membrane key module; one end of the adapter module is connected to the main control module, and the other end of the adapter module is provided with a spring ejector; one end of the control module is connected to the adapter module through the spring ejector; and the membrane key module is connected to the other end of the control module.

[0005] Furthermore, the membrane key module includes a switch module and a touch module, and both the membrane key module and the touch module are connected to the control module.

[0006] Furthermore, the control module includes a first control chip and a second control chip, the first control chip is connected to the touch module, the second control chip is connected to the switch module, and both the first control chip and the second control chip are connected to the adapter module via the spring pins.

[0007] Furthermore, the first control chip includes at least one first pin and at least one second pin, the first pin is connected to the touch module, the second pin is connected to the adapter module through the spring pin, and the first pin is also connected to the second pin.

[0008] Furthermore, the first control chip includes two first pins and two second pins, the two first pins are connected to the touch module, the two second pins are connected to the adapter module through the spring pins, and one first pin is also connected to one second pin.

[0009] Further, the control module also includes a first resistor, a second resistor, a third resistor and a fourth resistor; one end of the first resistor is connected to one of the first pins, the other end of the first resistor is connected to the adapter module through the spring ejector pin, one end of the second resistor is connected to one of the second pins, and the other end of the second resistor is connected to the touch module; one end of the third resistor is connected to another of the first pins, the other end of the third resistor is connected to the adapter module through the spring ejector pin, one end of the fourth resistor is connected to another of the second pins, and the other end of the fourth resistor is connected to the touch module.

[0010] Furthermore, the main control module includes an MCU and an indication circuit, and the indication circuit is connected to the MCU and the switching module respectively.

[0011] Further, the indication circuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a second capacitor; one end of the fifth resistor is respectively connected to the adapter module and the MCU, the other end of the fifth resistor is respectively connected to one end of the sixth resistor and one end of the first capacitor, one end of the eighth resistor is connected to the MCU, the other end of the eighth resistor is respectively connected to one end of the seventh resistor and one end of the second capacitor, the other end of the sixth resistor and the other end of the seventh resistor are both connected to the power supply, and the other end of the first capacitor and the other end of the second capacitor are both grounded.

[0012] Furthermore, the adapter module includes an adapter chip, and the adapter chip is respectively connected to the spring ejector pin and the main control module.

[0013] In a second aspect, the utility model further provides a display, comprising the FPC key circuit as described in any one of the above items.

[0014] The display provided by the utility model includes an FPC key circuit, which includes a main control module, a switching module, a control module and a membrane key module. The switching module is used to connect the main control module and the control module, and includes a spring ejector. By providing the spring ejector, the control module can be set at a position with a larger space on the display, so that the membrane key module can be set. The membrane key module can further reduce the thickness of the display to meet the demand for a thinner display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A block diagram of an FPC key circuit provided by an embodiment of the utility model;

[0017] Figure 2 A block diagram of an FPC key circuit provided by another embodiment of the utility model;

[0018] Figure 3 A block diagram of an FPC key circuit provided by another embodiment of the utility model;

[0019] Figure 4 A circuit diagram of a control module of an FPC key circuit provided in an embodiment of the utility model; and

[0020] Figure 5 A circuit diagram of an indication circuit of an FPC key circuit provided in one embodiment of the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, the singular forms of "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in the utility model specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0024] See also Figures 1 to 5 , Figure 1 A block diagram of an FPC key circuit provided by an embodiment of the utility model; Figure 2 A block diagram of an FPC key circuit provided by another embodiment of the utility model; Figure 3 A block diagram of an FPC key circuit provided by another embodiment of the utility model; Figure 4 A circuit diagram of a control module 30 of an FPC key circuit provided in an embodiment of the utility model; Figure 5 The circuit diagram of the indicator circuit 12 of the FPC key circuit provided by one embodiment of the utility model. Figure 1 As shown, the FPC key circuit provided by the utility model includes a main control module 10, an adapter module 20, a control module 30 and a membrane key module 40; one end of the adapter module 20 is connected to the main control module 10, and the other end of the adapter module 20 is provided with a spring ejector; one end of the control module 30 is connected to the adapter module 20 through the spring ejector; the membrane key module 40 is connected to the other end of the control module 30.

[0025] Specifically, the main control module 10 is arranged on the main board of the display, and includes a circuit structure for supporting the operation of the display, which is a circuit structure commonly used in the art and will not be described here. The adapter module 20 is used to connect the main control module 10 and the control module 30, which can be an adapter, one end of the adapter module 20 is connected to the main control module 10, and the other end thereof is provided with a spring ejector pin, which is connected to the control module 30. By providing a spring ejector pin, the control module 30 can be arranged in a relatively open space on the display.

[0026] The membrane key module 40 may include a membrane switch and an FPC board to reduce the thickness requirement of the display. Both the membrane switch and the FPC board may be connected to the control module 30 via an FPC flexible cable. The key command of the membrane key module 40 is sent to the main control module 10 via the control module 30 and the adapter module 20. The main control module 10 responds to the corresponding key command and performs the corresponding action.

[0027] As a further embodiment, the membrane key module 40 includes a switch module 41 and a touch module 42 , and both the membrane key module 40 and the touch module 42 are connected to the control module 30 .

[0028] The switch module 41 may be a membrane switch, which is disposed on the display and connected to the control module 30 via a flexible flat cable. The touch module 42 may include an FPC board, which is connected to the control module 30 via a flexible flat cable. The membrane switch and the FPC board have relatively low requirements on the thickness of the display, which can further reduce the thickness of the display.

[0029] As a further embodiment, the control module 30 includes a first control chip 31 and a second control chip 32, the first control chip 31 is connected to the touch module 42, the second control chip 32 is connected to the switch module 41, and the first control chip 31 and the second control chip 32 are both connected to the adapter module 20 through the spring pin.

[0030] The control module 30 may include a first control chip 31 and a second control chip 32 . The first control chip 31 is connected to the touch module 42 , and the second control chip 32 is connected to the switch module 41 . Both the first control chip 31 and the second control chip 32 are connected to the adapter module 20 via spring pins.

[0031] As a further embodiment, the first control chip 31 includes at least one first pin and at least one second pin, the first pin is connected to the touch module 42, the second pin is connected to the adapter module 20 through the spring pin, and the first pin is also connected to the second pin.

[0032] Further, the first control chip 31 includes two first pins and two second pins, the two first pins are connected to the touch module 42, the two second pins are connected to the adapter module 20 through the spring pins, and one first pin is also connected to one second pin.

[0033] The first control chip 31 includes at least one first pin and at least one second pin, one first pin is connected to one second pin, all first pins are connected to the touch module 42, all second pins are connected to the adapter module 20, and connected to the main control module 10 through the adapter module 20. The touch module 42 may include multiple touch buttons, one touch button is connected to one first pin, and multiple touch buttons correspond to multiple first pins. Figure 4 As shown, Figure 4 K5-K0 are the first pins, and D5-D0 are the second pins.

[0034] As a further embodiment, the control module 30 also includes a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; one end of the first resistor R1 is connected to one of the first pins, and the other end of the first resistor R1 is connected to the adapter module 20 through the spring ejector pin, one end of the second resistor R2 is connected to one of the second pins, and the other end of the second resistor R2 is connected to the touch module 42; one end of the third resistor R3 is connected to another first pin, and the other end of the third resistor R3 is connected to the adapter module 20 through the spring ejector pin, one end of the fourth resistor R4 is connected to another second pin, and the other end of the fourth resistor R4 is connected to the touch module 42.

[0035] Furthermore, the main control module 10 includes an MCU 11 and an indication circuit 12 , and the indication circuit 12 is connected to the MCU 11 and the adapter module 20 respectively.

[0036] Further, the indication circuit 12 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1 and a second capacitor C2; one end of the fifth resistor R5 is respectively connected to the adapter module 20 and the MCU11, the other end of the fifth resistor R5 is respectively connected to one end of the sixth resistor R6 and one end of the first capacitor C1, one end of the eighth resistor R8 is connected to the MCU11, the other end of the eighth resistor R8 is respectively connected to one end of the seventh resistor R7 and one end of the second capacitor C2, the other end of the sixth resistor R6 and the other end of the seventh resistor R7 are both connected to the power supply, and the other end of the first capacitor C1 and the other end of the second capacitor C2 are both grounded.

[0037] Among them, Figure 4 As shown, when the button corresponding to K5 is pressed, D5 outputs a low level, and S0_1 is connected to the fifth resistor R5 of the indication circuit 12 of the main control module 10 after passing through the adapter module 20. Figure 5 As shown, Figure 5The fifth resistor R5 in is used as a pull-up resistor, and the level of S0_1 is the voltage-divided value of the fifth resistor R5 and the second resistor R2 based on 3.3V. Similarly, when the key corresponding to K4 is pressed, D4 outputs a low level, and S1_1 is connected to the fifth resistor R5 of the indication circuit 12 of the main control module 10 after passing through the adapter module 20, and the level of S1_1 is the voltage-divided value of the fifth resistor R5 and the fourth resistor R4 based on 3.3V. Different keys can be distinguished by setting the second resistor R2 and the fourth resistor R4 to different resistance values. In addition, the number of the first pin and the second pin can be increased according to actual conditions, and one first pin is connected to one touch key, multiple touch keys correspond to multiple first pins, and one first pin corresponds to one second pin.

[0038] Furthermore, the adapter module 20 includes an adapter chip, and the adapter chip is connected to the spring ejector pin and the main control module 10 respectively.

[0039] The adapter module 20 may include an adapter chip, and the adapter chip is connected to the spring ejector pin and the main control module 10 respectively.

[0040] The utility model also discloses a display, comprising the FPC key circuit described in any one of the above embodiments; the FPC key circuit comprises a main control module 10, an adapter module 20, a control module 30 and a membrane key module 40; one end of the adapter module 20 is connected to the main control module 10, and the other end of the adapter module 20 is provided with a spring ejector; one end of the control module 30 is connected to the adapter module 20 through the spring ejector; and the membrane key module 40 is connected to the other end of the control module 30.

[0041] Specifically, the main control module 10 is arranged on the main board of the display, and includes a circuit structure for supporting the operation of the display, which is a circuit structure commonly used in the art and will not be described here. The adapter module 20 is used to connect the main control module 10 and the control module 30, which can be an adapter, one end of the adapter module 20 is connected to the main control module 10, and the other end thereof is provided with a spring ejector pin, which is connected to the control module 30. By providing a spring ejector pin, the control module 30 can be arranged in a relatively open space on the display.

[0042] The membrane key module 40 may include a membrane switch and an FPC board to reduce the thickness requirement of the display. Both the membrane switch and the FPC board may be connected to the control module 30 via an FPC flexible cable. The key command of the membrane key module 40 is sent to the main control module 10 via the control module 30 and the adapter module 20. The main control module 10 responds to the corresponding key command and performs the corresponding action.

[0043] The utility model connects the adapter module and the control module through the spring ejector pin, so that the keyboard can be set as a membrane keyboard and arranged at a position with a larger space on the display, thereby reducing the requirement on the thickness of the display and further reducing the thickness of the display.

[0044] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An FPC key circuit, characterized in that: Applied to displays, including: Main control module; A transfer module, one end of which is connected to the main control module, and the other end of which is provided with a spring ejector pin; A control module, one end of which is connected to the adapter module via the spring ejector pin; A membrane key module is connected to the other end of the control module.

2. The FPC key circuit according to claim 1, characterized in that: The membrane key module includes a switch module and a touch module, and both the membrane key module and the touch module are connected to the control module.

3. The FPC key circuit as claimed in claim 2, characterized in that: The control module includes a first control chip and a second control chip, the first control chip is connected to the touch module, the second control chip is connected to the switch module, and both the first control chip and the second control chip are connected to the adapter module via the spring pins.

4. The FPC key circuit as claimed in claim 3, characterized in that: The first control chip includes at least one first pin and at least one second pin, the first pin is connected to the touch module, the second pin is connected to the adapter module through the spring pin, and the first pin is also connected to the second pin.

5. The FPC key circuit as claimed in claim 4, characterized in that: The first control chip includes two first pins and two second pins, the two first pins are connected to the touch module, the two second pins are connected to the adapter module through the spring pins, and one first pin is also connected to one second pin.

6. The FPC key circuit as claimed in claim 5, characterized in that: The control module further includes a first resistor, a second resistor, a third resistor and a fourth resistor; One end of the first resistor is connected to one of the first pins, the other end of the first resistor is connected to the adapter module through the spring ejector pin, one end of the second resistor is connected to one of the second pins, and the other end of the second resistor is connected to the touch control module; One end of the third resistor is connected to another of the first pins, and the other end of the third resistor is connected to the adapter module through the spring pin. One end of the fourth resistor is connected to another of the second pins, and the other end of the fourth resistor is connected to the touch module.

7. The FPC key circuit as claimed in claim 6, characterized in that: The main control module includes an MCU and an indication circuit, and the indication circuit is connected to the MCU and the switching module respectively.

8. The FPC key circuit as claimed in claim 7, characterized in that: The indicating circuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a second capacitor; One end of the fifth resistor is connected to the adapter module and the MCU respectively, the other end of the fifth resistor is connected to one end of the sixth resistor and one end of the first capacitor respectively, one end of the eighth resistor is connected to the MCU, the other end of the eighth resistor is connected to one end of the seventh resistor and one end of the second capacitor respectively, the other end of the sixth resistor and the other end of the seventh resistor are both connected to the power supply, and the other end of the first capacitor and the other end of the second capacitor are both grounded.

9. The FPC key circuit according to claim 1, characterized in that: The adapter module includes an adapter chip, and the adapter chip is respectively connected to the spring ejector pin and the main control module.

10. A display, characterized in that It comprises the FPC key circuit as described in any one of claims 1 to 9.

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