Engine CAN (Controller Area Network) monitoring module with touch keys

Abstract

The utility model provides an engine CAN (Controller Area Network) monitoring module with touch keys. The engine CAN monitoring module comprises an upper panel and a lower shell, a display screen and four touch control areas are arranged on the upper panel, and light guide plates are arranged on the outer rings of the touch control areas; a circuit board is arranged on the back face of the upper panel, a touch screen controller and four copper disc keys are arranged on the circuit board, each copper disc key corresponds to one touch control area, and grid copper shielding electrodes are laid around the copper disc keys; each copper disc key is connected with an induction input port of the touch screen controller through a touch induction input circuit; a backlight LED lamp set is arranged around the copper disc key in a surrounding mode, and the backlight LED lamp set corresponds to the light guide plate. A host processor is arranged between the upper panel and the lower shell, the touch screen controller is in communication connection with the host processor through I2C, and the backlight LED lamp set is electrically connected with the host processor.

Description

Technical Field

[0001] The utility model relates to an engine CAN monitoring module, specifically, to an engine CAN monitoring module with touch keys. Background Art

[0002] The engine CAN monitoring module is used to monitor the engine. In the design of the previous engine CAN monitoring modules, traditional mechanical keys were mostly adopted. The core of the mechanical key is a mechanical switch, which is responsible for detecting whether the key is pressed and generating corresponding electrical signals. Among them, the mechanical switch is composed of an upper shell, a lower shell, a spring, a contact and a conductive metal sheet, etc. When the key is pressed, the upper shell applies pressure to the spring, causing the spring to compress and drive the contact to contact the conductive metal sheet, forming a closed circuit. When the key is released, the spring returns to its original state, the contact separates from the conductive metal sheet, and the circuit is disconnected.

[0003] However, after the traditional mechanical keys are pressed multiple times, the phenomenon of key breakage is likely to occur, so they need to be repaired and replaced after being used for a period of time; in addition, the traditional mechanical keys have a problem of low yield rate during chip mounting.

[0004] The capacitive touch key is a technology based on capacitance induction. Its working principle is to judge the user's operation by detecting the capacitance change between the touch point and the sensor. At present, it has gradually begun to replace the traditional mechanical keys. Different from the mechanical keys that provide tactile feedback to users themselves, touch keys require additional components to provide feedback. Among them, LEDs are widely used to achieve visual feedback and provide backlight illumination for the touch-based user interface. Specifically, holes are opened in the middle part of the sensing electrode, and then LEDs are installed on the back of the sensing electrode, etc. This inevitably requires increasing the sensing electrode to make up for the area lost due to the holes, so it is impossible to achieve a small volume; and the visual feedback effect is not very good when the LED lamp is used for backlight illumination. In addition, the general control chip only has 8 sensing input interfaces. Since each touch key and each LED lamp need to be connected to the control chip, plus the original shielding motor, protection sensor, etc., it is necessary to replace it with a control chip with 16 or more sensing inputs, resulting in high cost and increased volume.

[0005] For the engine CAN monitoring module, what is desired is to reduce the volume to adapt to various installation scenarios.

[0006] In order to solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Invention

[0007] The object of the present utility model is to address the deficiencies of the prior art, and thus provide an engine CAN monitoring module with touch buttons. Visual feedback and backlighting are realized by different LED lights respectively, which can clearly distinguish visual feedback and backlighting. In addition, the backlighting uses side lighting, and there is no need to add induction electrodes, so the volume of the circuit board will not increase. At the same time, the LED lights and the touch buttons are respectively connected to different controllers, so that the existing controller can meet the connection of the LED light group without further improvement of the controller, and the volume of the engine CAN monitoring module will not increase either.

[0008] To achieve the above object, the technical solution adopted by the present utility model is: an engine CAN monitoring module with touch buttons, including an upper panel and a lower housing; a display screen and four touch control areas are provided on the upper panel, and a touch feedback area is further provided above each touch control area;

[0009] A circuit board is provided on the back of the upper panel. A touch screen controller and four copper disk buttons are provided on the circuit board. Each copper disk button corresponds to a touch control area, and a grid copper shielding electrode is laid around each copper disk button; each copper disk button is connected to an induction input port of the touch screen controller through a touch induction input circuit;

[0010] A light guide plate is provided on the outer ring of the touch control area, and a backlight LED light group is further provided around the copper disk buttons. The backlight LED light group corresponds to the light guide plate;

[0011] The touch feedback area includes a light-transmitting hole, and a touch feedback LED light is provided below the light-transmitting hole;

[0012] A host processor is provided between the upper panel and the lower housing. The touch screen controller is communicatively connected to the host processor through I2C, and the backlight LED light group and the touch feedback LED light are electrically connected to the host processor.

[0013] In one embodiment, a light sensor is further included, and the light sensor is electrically connected to the host processor.

[0014] In one embodiment, a reflective ring is provided on the back of the upper panel corresponding to the light guide plate, and the backlight LED light group is provided within the reflective ring.

[0015] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model realizes side light emission through the backlight LED lamp group arranged around the copper disk key, and through the light guiding effect of the light guide plate, and finally emits from directly above the light guide plate to increase the illumination; in addition, a touch feedback LED lamp is set for touch feedback, which can clearly distinguish visual feedback and backlight illumination; and the touch visual feedback LED lamp and the backlight LED lamp group are connected to the host processor instead of the touch screen controller. Since there is no need to use the induction input port of the touch screen controller, there is no need to improve the touch screen controller to a large volume with more induction input ports, so the circuit board can be kept small in volume, and then the volume of the engine CAN monitoring module can be reduced.

[0016] In addition, a grid copper shielding electrode is laid around the touch key, which can prevent water droplets from covering the surface of the copper disk key and affecting the change of the ground capacitance value of the copper disk key, avoid accidental touch of the copper disk key, and ensure that the sensitivity remains unchanged; the setting of the reflective ring can further evenly reflect light and display it on the upper panel through the light guide plate to achieve a uniform backlight effect on the upper part; the touch screen controller and external products adopt the I2C communication method, which is beneficial to the standardization of products and expands the application range of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the utility model.

[0018] Figure 2 is a schematic block diagram of the principle of the utility model.

[0019] Figure 3 is a schematic diagram of the touch key circuit of the utility model.

[0020] In the figure, 1. upper panel; 2. display screen; 3. light guide plate; 4. light transmission hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solution of the utility model will be further described in detail below through specific embodiments.

[0022] Embodiment 1

[0023] This embodiment provides an engine CAN monitoring module with touch keys, as Figure 1-2 shown, including an upper panel 1 and a lower housing; a display screen 2 and four touch control areas are arranged on the upper panel 1, and a touch feedback area is also arranged above each touch control area. Specifically, the four touch control areas are respectively a function key area, a left flip key area, a right flip key area, and a return key area, which are respectively used to execute menu options, left flip operations, right flip operations, and return operations.

[0024] A circuit board is provided on the back of the upper panel. A touch screen controller and four copper disk buttons are provided on the circuit board. Each copper disk button corresponds to a touch control area, and a grid copper shielding electrode is laid around each copper disk button. The grid copper shielding electrodes laid around the touch buttons can prevent water droplets from covering the surface of the copper disk buttons and affecting the change of the ground capacitance value of the copper disk buttons, avoid accidental touch of the copper disk buttons, and ensure that the sensitivity remains unchanged.

[0025] Each copper disk button is connected to an induction input port of the touch screen controller through a touch induction input circuit.

[0026] A light guide plate 3 is provided on the outer ring of the touch control area, and a backlight LED lamp group is also provided around the copper disk buttons. The backlight LED lamp group corresponds to the light guide plate 3. The setting of the backlight LED lamp group can increase the illumination in a low-light environment and facilitate button operation.

[0027] The touch feedback area includes a light-transmitting hole 4, and a touch feedback LED lamp is provided below the light-transmitting hole 4.

[0028] A host processor is provided between the upper panel and the lower housing. The touch screen controller is communicatively connected to the host processor through I2C, and the backlight LED lamp group and the touch feedback LED lamp are electrically connected to the host processor.

[0029] During use, when a copper disk button is touched, the touch induction input circuit connected thereto transmits a touch signal to the touch screen controller through the corresponding induction input port. When the touch screen controller determines the existence of the touch through the built-in touch induction algorithm, it sends a trigger signal to the host processor through I2C. The host processor controls the user interface according to the trigger signal and simultaneously controls the touch feedback LED lamp to emit light according to the trigger signal.

[0030] Specifically, there are already many mature touch induction algorithms on the market, so the existing algorithms can be directly adopted in this embodiment.

[0031] Further, the host processor can control the corresponding touch feedback LED lights to emit light according to the trigger signal. It can be understood that the trigger signal may include the number of the corresponding copper disk button. At this time, the host processor has a built-in association relationship between the touch button number and the touch feedback LED light. When the host processor receives the trigger signal, it searches for the association relationship between the touch button number and the touch feedback LED light according to the number of the copper disk button, obtains the corresponding touch feedback LED light, and controls the corresponding touch feedback LED light to emit light. In another embodiment, the trigger signal may also directly be the number of the corresponding touch feedback LED light. At this time, the touch screen controller has a built-in association relationship between the touch feedback LED light number and the copper disk button number. When the touch screen controller detects that a certain copper disk button is touched, it directly outputs the associated touch feedback LED light number to the host processor, and the host processor controls the corresponding touch feedback LED light to emit light.

[0032] When in a low-light environment, the host processor controls the backlight LED light group to work. In one embodiment, the engine CAN monitoring module may further be provided with a light sensor, and the light sensor is connected to the host processor. When detecting low illumination, the host processor controls the backlight LED light group to work. Or, the engine CAN monitoring module controls the backlight LED light group to work regularly.

[0033] Of course, it is also possible to control the work of the backlight LED light group by performing menu options, left-turn operations, right-turn operations, and return operations, etc. through the function key area, left-turn key area, right-turn key area, and return key area in Embodiment 1.

[0034] Further, a reflective ring is provided on the back of the upper panel corresponding to the light guide plate 3, and the backlight LED light group is arranged within the reflective ring. It can be understood that the setting of the reflective ring can further evenly reflect light, and display it on the upper panel through the light guide plate, realizing the uniform backlight effect of the upper panel.

[0035] It can be seen that the present utility model realizes visual feedback and backlight illumination with different LED lights respectively, and can clearly distinguish visual feedback and backlight illumination; among them, the backlight illumination uses side light emission, and since there is no need to increase induction electrodes, the volume of the circuit board will not be increased. At the same time, the LED lights and the touch buttons are respectively connected to different controllers, so that the existing controller can meet the access of the LED light group, and there is no need to additionally improve the touch screen controller to a large volume with more induction input ports, so that the circuit board can maintain a small volume, and further reduce the volume of the engine CAN monitoring module.

[0036] It should be noted that the host processor is the original control module of the engine CAN monitoring module and has multiple expansion ports; in this embodiment, these expansion ports of the host processor are used to connect to the touch feedback LED lights, so that the touch screen controller does not need to be improved.

[0037] Furthermore, the touch screen controller and the host processor adopt the I2C communication method, which is beneficial to the standardization of products and expands the application scope of products.

[0038] Embodiment 2

[0039] This embodiment provides an implementation manner of the touch screen controller.

[0040] The touch screen controller is a touch screen controller of the CY8CMBR3xxx series. The high performance of the chip can simplify its peripheral circuit, thus making the circuit board smaller, and further reducing the volume of the engine CAN monitoring module.

[0041] As Figure 3 shown, in this embodiment, taking the CY8CMBR3108-LQXIT touch screen controller as an example, the CS7 / GPO3 / SH pins of the CY8CMBR3108-LQXIT touch screen controller are directly connected to the grid copper shielding electrode surrounding the copper pad button. Preferably, the design requirements of the grid copper shielding electrode are a line width of 7 mil and a pitch of 45 mil.

[0042] The CS2 / GUARD pin of the CY8CMBR3108-LQXIT touch screen controller is connected to the copper wire protection ring on the circuit board through a resistor. Preferably, the copper wire protection ring is the copper trace surrounding all the copper pad buttons on the PCB.

[0043] The HI / BUZE pin of the CY8CMBR3108-LQXIT touch screen controller is connected to the power supply VDD through a resistor R11 on the one hand, and connected to the host processor on the other hand to implement the host interrupt function.

[0044] The I2C_SDA pin of the CY8CMBR3108-LQXIT touch screen controller is connected to the I2C communication circuit through a resistor R2 and connected to the host processor through the I2C communication circuit.

[0045] The touch sensing input circuit includes sensing resistors, and each copper pad button is connected to the sensing input port of the touch screen controller through a resistor.

[0046] Specifically, in this embodiment, the sensing resistors include R4 - R7, and the copper disk buttons are respectively Return_Key Sensor copper disk button, Menu_Key Sensor copper disk button, Left_Key Sensor copper disk button, and Right_Key Sensor copper disk button. One end of resistor R4 is connected to the CS0 pin of the CY8CMBR3108 - LQXIT touch screen controller, and the other end is connected to the Return_Key Sensor copper disk button; one end of resistor R6 is connected to the CS1 pin of the CY8CMBR3108 - LQXIT touch screen controller, and the other end is connected to the Right_Key Sensor copper disk button; one end of resistor R5 is connected to the CS4 pin of the CY8CMBR3108 - LQXIT touch screen controller, and the other end is connected to the Left_Key Sensor copper disk button; one end of resistor R3 is connected to the CS5 pin of the CY8CMBR3108 - LQXIT touch screen controller, and the other end is connected to the Menu_Key Sensor copper disk button.

[0047] The CMOD pin of the CY8CMBR3108 - LQXIT touch screen controller is connected to the modulation capacitor C5, and the other end of the capacitor C5 is connected to GND; the VCC pin of the CY8CMBR3108 - LQXIT touch screen controller is the output of the internal voltage regulator and is connected to GND through the capacitor C6; the VDD_IO pin of the CY8CMBR3108 - LQXIT touch screen controller supplies power to the HI and I2C lines; the VDD pin of the CY8CMBR3108 - LQXIT touch screen controller is the power supply and is connected to the capacitors C1 and C2, and the other ends of C1 and C2 are connected to GND.

[0048] Embodiment 3

[0049] The difference between this embodiment and Embodiment 2 is that the HI / BUZE pin of the touch screen controller is connected to a buzzer to implement the audio feedback function when the button is touched.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An engine CAN monitoring module with touch buttons, characterized in that: It includes an upper panel and a lower shell; the upper panel is provided with a display screen and four touch control areas, and a touch feedback area is also provided above each touch control area; A circuit board is arranged on the back of the upper panel, and a touch screen controller and four copper plate buttons are arranged on the circuit board, each copper plate button corresponds to a touch control area, and a grid copper shielding electrode is laid around the copper plate button; each copper plate button is connected to a sensing input port of the touch screen controller through a touch sensing input circuit; The outer ring of the touch control area is provided with a light guide plate, and the copper plate button is also surrounded by a backlight LED light group, and the backlight LED light group corresponds to the light guide plate; The touch feedback area includes a light-transmitting hole, and a touch feedback LED light is arranged below the light-transmitting hole; A host processor is arranged between the upper panel and the lower shell, the touch screen controller is connected to the host processor through I2C communication, and the backlight LED lamp group and the touch feedback LED lamp are electrically connected to the host processor.

2. The engine CAN monitoring module with touch buttons according to claim 1, characterized in that: A reflective ring is arranged on the back side of the upper panel corresponding to the light guide plate, and the backlight LED lamp group is arranged in the reflective ring.

3. The engine CAN monitoring module with touch buttons according to claim 2, characterized in that: A light sensor is also included, and the light sensor is electrically connected to the host processor.

4. An engine CAN monitoring module with touch buttons according to claim 1 or 2, characterized in that: The touch sensing input circuit includes a sensing resistor, and each copper plate button is connected to the sensing input port of the touch screen controller via a sensing resistor.

5. The engine CAN monitoring module with touch buttons according to claim 4, characterized in that: The touch screen controller is a CY8CMBR3xxx series touch screen controller, the CS7 / GPO3 / SH pin of the touch screen controller is directly connected to the grid copper shielding electrode surrounding the copper plate button; the CS2 / GUARD pin of the touch screen controller is connected to the copper wire guard ring on the circuit board through a resistor.

6. The engine CAN monitoring module with touch buttons according to claim 5, characterized in that: The HI / BUZE pin of the touch screen controller is connected to the power supply VDD through the resistor R11 on one hand, and is connected to the host processor on the other hand.

7. The engine CAN monitoring module with touch buttons according to claim 5, characterized in that: The HI / BUZE pin of the touch screen controller is connected to a buzzer.

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