Display instrument for automobile and automobile

Abstract

The utility model discloses a display instrument and car for car, this display instrument includes display screen, circuit board and touch control part, and circuit board sets up at the back of display screen, and touch control part sets up at the front of display screen, the multiple inductive capacitances of different capacitance value are arranged on the touch control part, and the multiple detection resistances of same resistance value are arranged on the circuit board, and the multiple inductive capacitances and multiple detection resistances one -to -one correspond, and every inductive capacitance is connected in series with corresponding detection resistance, forms detection circuit. This display instrument when using, when enlarging or reducing a display area, need to press simultaneously the adjacent two display areas of multiple inductive capacitances corresponding with the display area that needs to enlarge or reduce, therefore, reduced the risk of misoperation when the driver is to a display area enlarge or reduce instruction, so that the driver can accurately enlarge or reduce the display area that needs to operate.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to a display instrument for automobiles, which can be applied to automobiles. Background Technology

[0002] As vehicles become more functional, existing in-vehicle touchscreen dashboards integrate multi-function displays and an increasing number of instrument clusters. The multi-function displays can show information such as trip odometer, total mileage, and gear position. The instrument clusters can display speedometers, tachometers, battery levels, and more.

[0003] Current in-vehicle instrument clusters typically have several different display themes due to different driver usage habits. Different themes display elements of different sizes and layouts, allowing drivers to choose different theme layouts to meet different scenario needs based on their driving habits.

[0004] Specifically, the instrument panel display includes multiple different display areas. When using the car's instrument panel, drivers need to zoom in or out on the icons or images in different display areas depending on the usage scenario. For example, when driving on complex roads and needing to constantly monitor the vehicle speed, the content displayed in the speed display area needs to be zoomed in to make the speed display clearer. Similarly, when driving on complex roads, the content displayed in the navigation display area needs to be zoomed in. However, in existing instrument panel displays, zooming in or out on icon display areas is generally done by clicking the screen. If the clicked screen position is inaccurate, the desired display area cannot be zoomed in or out; instead, adjacent display areas may be zoomed in or out, which can easily lead to accidental touches. Utility Model Content

[0005] The purpose of this utility model is that in the existing instrument display screen, when zooming in or out of the icon display area, a certain display area is zoomed in or out by clicking the screen. If the screen position clicked is inaccurate, the display area to be operated cannot be zoomed in or out. Instead, the display area adjacent to the display area to be operated will be zoomed in or out, which may easily cause accidental touches.

[0006] To address the aforementioned problems, this utility model provides a display instrument for automobiles, comprising a display screen, a circuit board, and a touch component. The circuit board is disposed on the back of the display screen, and the touch component is disposed on the front of the display screen.

[0007] The touch component has multiple sensing capacitors with different capacitance values ​​spaced apart, and the circuit board has multiple detection resistors with the same resistance value. The multiple sensing capacitors and multiple detection resistors correspond one-to-one, and each sensing capacitor is connected in series with the corresponding detection resistor to form a detection circuit.

[0008] The display instrument also includes a power supply circuit integrated on the circuit board. The input terminal of each detection circuit is electrically connected to the output terminal of the power supply circuit, and the output terminal is grounded. In each detection circuit, the sensing capacitor is located between the output terminal of the power supply circuit and the detection resistor, and a detection point is set at the position between the sensing capacitor and the detection resistor. Furthermore, the display screen is provided with multiple display areas, and each pair of adjacent sensing capacitors corresponds to one of the multiple display areas. When any two adjacent sensing capacitors are pressed at the same time, the detection points on the two detection circuits where the two sensing capacitors are located output corresponding voltage signals.

[0009] Using the above technical solution, since the values ​​of multiple sensing capacitors on the touch component are different, while the resistance values ​​of multiple sensing resistors are the same, and since in each detection circuit, the sensing capacitor is located between the output terminal of the power supply circuit and the sensing resistor, when different sensing capacitors are pressed, the current value in each detection circuit is different. Therefore, it can be seen that the voltage detected at each detection point is different.

[0010] Therefore, when a driver operates this display instrument, taking the zooming in or out of the vehicle speed display area as an example, since two adjacent sensing capacitors among the multiple sensing capacitors correspond to the vehicle speed display area, simultaneously pressing the two adjacent sensing capacitors corresponding to the vehicle speed display area causes the detection points on the two detection circuits containing these two sensing capacitors to output corresponding voltage signals, outputting instructions to zoom in or out of the vehicle speed display area, thereby zooming in or out of the vehicle speed display area. Of course, it should be understood that when pressing two adjacent sensing capacitors simultaneously, it can be set so that pressing two fingers close together is the zoom-out instruction, and sliding two fingers apart is the zoom-in instruction.

[0011] In summary, when using this display instrument, to zoom in or out on a certain display area, it is necessary to simultaneously press two adjacent display areas corresponding to the area to be zoomed in or out from among multiple sensing capacitors. Pressing a single sensing capacitor will not cause the display area to zoom in or out. Furthermore, each pair of adjacent sensing capacitors corresponds to one of the multiple display areas. Therefore, the risk of accidental touches when the driver issues zoom in or out commands on a certain display area is reduced, allowing the driver to accurately zoom in or out on the desired display area.

[0012] Furthermore, the present invention also discloses a display instrument for automobiles, which further includes a touch switching circuit. The touch switching circuit can switch between an electrically on state and an electrically off state. The input terminal of the touch switching circuit is electrically connected to the output terminal of the power supply circuit, the output terminal is grounded, and the touch switching circuit is connected in parallel with each detection circuit.

[0013] When the touch switching circuit is in the electrically conducting state, the current of the power supply circuit flows back to ground through the touch switching circuit; when the touch switching circuit is in the electrically disconnected state, the current of the power supply circuit flows back to ground through each detection circuit.

[0014] By employing the above technical solution, a touch-sensitive switching circuit can be set up to control whether the touch-sensitive components can operate. When the touch-sensitive switching circuit is in an electrically conductive state, the current from the power supply circuit flows back to ground through the touch-sensitive switching circuit, thus short-circuiting each detection circuit. When the touch-sensitive switching circuit is in an electrically decongested state, the current from the power supply circuit flows back to ground through each detection circuit, allowing the driver to issue commands to zoom in or out of a specific display area. Therefore, by setting up a touch-sensitive circuit, when the vehicle is in normal driving and there is no need to zoom in or out of multiple display areas on the instrument panel, the touch-sensitive switching circuit can be electrically conductive, thus short-circuiting each detection circuit, further reducing the risk of accidental touches by the driver or front passenger when operating the instrument panel.

[0015] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles, wherein the touch switching circuit includes a first transistor, the collector of the first transistor is electrically connected to the output terminal of the power supply circuit, and the emitter is grounded.

[0016] By adopting the above technical solution, the first transistor can be turned on or off, allowing the touch switching circuit to switch between an electrically on or electrically off state. Furthermore, the transistor can complete the on / off operation in a very short time, with a response speed far exceeding that of traditional mechanical switches. This results in a fast response speed when the touch switching circuit switches between an electrically on or electrically off state, making the driver's operation smoother and reducing the risk of delays.

[0017] Furthermore, since transistors are made of semiconductor materials, there are no physical contact wear or poor contact issues, avoiding the risk of electrical sparks, thus significantly improving circuit reliability and lifespan, and further enhancing vehicle safety.

[0018] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles, wherein the power supply circuit includes a DC-DC converter and a second transistor connected in series. The input terminal of the DC-DC converter is electrically connected to an external power supply, the output terminal of the DC-DC converter is electrically connected to the collector of the second transistor, the emitter of the second transistor is electrically connected to the input terminal of each detection circuit, and the emitter of the second transistor is electrically connected to the collector of the first transistor.

[0019] The power supply circuit also includes a first voltage divider resistor and a third transistor connected in series. The input terminal of the first voltage divider resistor is electrically connected to the circuit between the output terminal of the DC-DC converter and the collector of the second transistor. The output terminal of the first voltage divider resistor is electrically connected to the collector of the third transistor, and the emitter of the third transistor is grounded.

[0020] The power supply circuit also includes a current-limiting resistor. One end of the current-limiting resistor is electrically connected to the circuit between the output terminal of the first voltage divider resistor and the collector of the third transistor, and the other end is electrically connected to the base of the second transistor.

[0021] By adopting the above technical solution, a DC-DC converter can be set in the power supply circuit to convert the current of the external power supply into a current that meets the load requirements, while realizing voltage stability and electrical isolation of the power supply circuit.

[0022] Furthermore, when this display instrument is used and an external power supply powers the power supply circuit, a weak current is supplied to the base of the third transistor through the instrument's power chip, causing the third transistor to conduct. At this time, the current supplied by the external power supply flows to ground after passing through the DC-DC converter, the first voltage divider resistor, and the conducting third transistor, forming a current-limiting loop. Meanwhile, due to the presence of the second voltage divider resistor, the current-limiting loop has voltage, thus powering the current-limiting resistor and turning on the second transistor, completing the power supply to the detection circuit. Therefore, the power supply circuit, while supplying power to the detection circuit, also forms a current-limiting loop to limit the current, further ensuring circuit safety and making this automotive display instrument more reliable.

[0023] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles, the display instrument further comprising a second voltage divider resistor, the second voltage divider resistor being connected in series between the output terminal of the power supply circuit and the input terminal of each detection circuit; the collector of the first transistor is electrically connected to the circuit between the emitter of the second transistor and the second voltage divider resistor.

[0024] The display instrument also includes a third voltage divider resistor. One end of the third voltage divider resistor is electrically connected to the output terminal of each detection circuit and the emitter of the first transistor, and the other end is grounded.

[0025] The display instrument also includes a controller. The controller's detection terminal is electrically connected to the detection point of each detection circuit. The controller's detection terminal is also electrically connected to the base of the first transistor and the base of the third transistor, respectively. A fourth voltage divider resistor is connected in series in the electrical connection line between the controller's detection terminal and the detection point of each detection circuit. A fifth voltage divider resistor is connected in series in the electrical connection line between the controller's detection terminal and the base of the first transistor. A sixth voltage divider resistor is connected in series in the electrical connection line between the controller's detection terminal and the base of the third transistor.

[0026] By adopting the above technical solution, voltage divider resistors are set on multiple circuits of this display instrument. In this way, the voltage divider resistors can reduce the voltage surge of the corresponding load components, prevent the components from being damaged due to excessive voltage, and make this display instrument safer and more reliable in use, and extend the service life of this display instrument.

[0027] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles, wherein the touch component is strip-shaped and faces the display screen; and the touch component is located at the edge of the front of the display screen, and multiple sensing capacitors are arranged sequentially at intervals along the height direction of the display screen.

[0028] By adopting the above technical solution, and by setting the touch component at the edge of the front of the display screen, and arranging multiple sensing capacitors at intervals along the height of the display screen, the driver's palm will not block the display screen when pressing the sensing capacitor, and the risk of the driver's jewelry (such as rings, watches, etc.) scratching the screen is reduced; on the other hand, the driver can press the sensing capacitor more conveniently.

[0029] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles, wherein multiple sensing capacitors are configured as at least three sensing capacitors, and along the height direction of the display screen, the capacitance values ​​of the at least three sensing capacitors decrease or increase sequentially from top to bottom.

[0030] By adopting the above technical solution, since the capacitance values ​​of at least three sensing capacitors decrease or increase sequentially from top to bottom, the detected voltage values ​​increase or decrease sequentially. This makes it easy to associate each display area with its corresponding two sensing capacitors, and avoids control errors.

[0031] Furthermore, an embodiment of this utility model also discloses a display instrument for automobiles. The display instrument further includes a glass cover plate. In the thickness direction of the display screen, the glass cover plate is fixedly disposed on the front of the display screen, and the touch component is located between the glass cover plate and the front of the display screen.

[0032] By adopting the above technical solution, a glass cover is fixedly installed on the front of the display screen, and the touch component is located between the glass cover and the front of the display screen. The glass cover can protect the touch component and the display screen, so that the touch component and the display screen will not easily wear out during long-term use, even under frequent pressing and friction, thus improving the service life of the display instrument.

[0033] Furthermore, the present invention also discloses a display instrument for automobiles. The display instrument further includes a housing, and the housing has a display opening adapted to a glass cover. The circuit board and the display screen are both fixedly installed inside the housing, and the glass cover is fixedly covered on the display opening.

[0034] By adopting the above technical solution and setting up a housing, the circuit board, display screen and touch components can be protected, reducing the risk of damage to the circuit board, display screen and touch components in the event of a car accident (such as a collision or water crossing), thus making the car safer.

[0035] This utility model also discloses an automobile, including the aforementioned display instrument for automobiles.

[0036] By adopting the above technical solution, since this type of vehicle uses this display instrument, when using the display instrument to zoom in or out of a certain display area while driving, it is necessary to simultaneously press two adjacent display areas corresponding to the display area to be zoomed in or out from among multiple sensing capacitors. Pressing a single sensing capacitor will not cause the display area to zoom in or out. Furthermore, each pair of adjacent sensing capacitors corresponds to one display area among multiple display areas. Therefore, the risk of accidental touches when the driver issues zoom in or out commands to a certain display area is reduced, allowing the driver to accurately zoom in or out of the display area to be operated. Attached Figure Description

[0037] Figure 1 An exploded view of a display instrument for automobiles provided in an embodiment of this utility model;

[0038] Figure 2 A circuit diagram for a display instrument for automobiles provided for an embodiment of this utility model;

[0039] Figure 3 A schematic diagram of the touch control principle of the inductive capacitor provided in this embodiment of the utility model;

[0040] Figure 4 A magnified view of the vehicle speed display area of ​​the display screen provided in an embodiment of this utility model;

[0041] Figure 5This diagram illustrates the process of reducing the vehicle speed display area of ​​the display screen provided in this embodiment of the utility model.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Display screen;

[0044] 2. Circuit board;

[0045] 20. Detect resistance;

[0046] 3. Touchscreen components;

[0047] 30. Sensing capacitor;

[0048] 4. Power supply circuit;

[0049] 40. Second transistor; 41. DC-DC converter; 42. First voltage divider resistor; 43. Third transistor; 44. Current limiting resistor; 45. Second voltage divider resistor; 46. Third voltage divider resistor; 47. Fourth voltage divider resistor; 48. Fifth voltage divider resistor; 49. Sixth voltage divider resistor;

[0050] 5. Touch control switching circuit;

[0051] 50. First transistor;

[0052] 6. Controller;

[0053] 7. Glass cover plate;

[0054] L represents the length direction; H represents the height direction. Detailed Implementation

[0055] As described in the background section, existing instrument displays typically zoom in or out of an icon area by clicking the screen. However, if the click is inaccurate, the desired area may not be zoomed in or out; instead, adjacent areas may be magnified or reduced, leading to accidental touches. To address this issue, this invention provides an instrument display for automobiles, comprising a display screen, a circuit board, and a touch component. The circuit board is located on the back of the display screen, and the touch component is located on the front. The touch component has multiple sensing capacitors with varying capacitance values ​​spaced apart, while the circuit board has multiple sensing resistors with the same resistance value. Each sensing capacitor corresponds one-to-one with a sensing resistor, and each sensing capacitor is connected in series with its corresponding sensing resistor to form a detection circuit. When using this type of display instrument, to zoom in or out on a certain display area, it is necessary to simultaneously press two adjacent display areas corresponding to the area to be zoomed in or out from among multiple sensing capacitors. Pressing a single sensing capacitor will not cause the display area to zoom in or out. Furthermore, each pair of adjacent sensing capacitors corresponds to one of the multiple display areas. Therefore, the risk of accidental touches when the driver issues zoom in or out on a certain display area is reduced, allowing the driver to accurately zoom in or out on the display area that needs to be operated.

[0056] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0057] like Figure 1 and Figure 2 As shown, a display instrument for automobiles includes a display screen 1, a circuit board 2, and a touch component 3. The circuit board 2 is disposed on the back of the display screen 1, and the touch component 3 is disposed on the front of the display screen 1. It should be understood that the front of the display screen 1 is the side of the display screen 1 facing the interior of the vehicle, and the back of the display screen 1 is the side of the display screen 1 located inside the instrument panel.

[0058] Specifically, the touch component 3 has multiple sensing capacitors 30 with different capacitance values ​​spaced apart, and these sensing capacitors 30 are connected in parallel. The circuit board 2 has multiple detection resistors 20 with the same resistance value. Each sensing capacitor 30 corresponds to one detection resistor 20, and each sensing capacitor 30 is connected in series with its corresponding detection resistor 20 to form a detection circuit. It should be understood that the number of sensing capacitors 30 can be 2, 3, 5, etc., and the number of corresponding detection resistors 20 can also be 2, 3, 5, etc., which is not limited in this embodiment.

[0059] More specifically, the display instrument also includes a power supply circuit 4 integrated on the circuit board 2. The input terminal of each detection circuit is electrically connected to the output terminal of the power supply circuit 4, and the output terminal is grounded. In each detection circuit, the sensing capacitor 30 is located between the output terminal of the power supply circuit 4 and the detection resistor 20, and a detection point is set at the position between the sensing capacitor 30 and the detection resistor 20. Furthermore, the display screen 1 is provided with multiple display areas, and each pair of adjacent sensing capacitors 30 corresponds to one of the multiple display areas. When any two adjacent sensing capacitors 30 are pressed at the same time, the detection points on the two detection circuits where the two sensing capacitors 30 are located output corresponding voltage signals respectively.

[0060] Specifically, since the values ​​of the multiple sensing capacitors 30 on the touch component 3 are different, while the resistance values ​​of the multiple sensing resistors 20 are the same, and since in each detection circuit, the sensing capacitor 30 is located between the output terminal of the power supply circuit 4 and the sensing resistor 20, when different sensing capacitors 30 are pressed, the current value in each detection circuit is different. Therefore, it can be seen that the voltage detected at each detection point is different.

[0061] Therefore, when the driver operates this display instrument, it is magnified (see...) Figure 4 ) or shrink (see Figure 5 Taking the vehicle speed display area as an example, since two adjacent sensing capacitors 30 among the multiple sensing capacitors 30 correspond to the vehicle speed display area, pressing the two adjacent sensing capacitors 30 corresponding to the vehicle speed display area simultaneously causes the detection points on the two detection circuits containing these two sensing capacitors 30 to output corresponding voltage signals, outputting instructions to enlarge or reduce the vehicle speed display area, thereby enlarging or reducing the vehicle speed display area. Of course, it should be understood that when pressing two adjacent sensing capacitors 30 simultaneously, it can be set so that pressing two fingers close together is the reduction instruction (see...). Figure 5 The magnification instruction is to slide two fingers away from each other while pressing (see [link]). Figure 4 ).

[0062] It should be noted that, see Figure 3The working principle of the sensing capacitor 30 is as follows: When a finger touches or presses the capacitive screen of the display instrument, due to the conductivity of the human body and its own electric field, a coupling capacitor is formed between the human body and the screen. The driving electrode 300 is mainly used to generate high-frequency signals (such as low-voltage high-frequency signals), forming a stable current through the capacitive screen. When a finger touches the screen, the human body acts as a grounded conductor, and the high-frequency signal flows into the ground wire through the equivalent capacitance, causing a change in the current intensity at the receiving end. The sensing electrode 301 is responsible for detecting the capacitance change. When a finger approaches or touches the screen, it changes the distribution of the local electric field 302, causing the capacitance value to increase. By measuring the voltage change or current ratio, the touch position can be determined. In addition, by setting the sensing capacitor 30 to contact the screen, accidental operation can be effectively prevented. It only takes effect when two fingers of the user touch two adjacent contacts simultaneously. Other physical pressing will not trigger it, ensuring the stability of the instrument display and driving safety.

[0063] In summary, when using this display instrument, to zoom in or out on a certain display area, it is necessary to simultaneously press two adjacent display areas corresponding to the area to be zoomed in or out from among multiple sensing capacitors 30. Pressing a single sensing capacitor 30 will not cause the display area to zoom in or out. Furthermore, each pair of adjacent sensing capacitors 30 corresponds to one of the multiple display areas. Therefore, the risk of accidental touches when the driver issues zoom in or out commands on a certain display area is reduced, allowing the driver to accurately zoom in or out on the desired display area.

[0064] Alternatively, in one feasible implementation, such as Figure 2 As shown, in order to reliably control whether the touch component 3 can work, the display instrument also includes a touch switching circuit 5. The touch switching circuit 5 can switch between an electrically on state and an electrically off state. The input terminal of the touch switching circuit 5 is electrically connected to the output terminal of the power supply circuit 4, and the output terminal is grounded. The touch switching circuit 5 is set in parallel with each detection circuit.

[0065] Specifically, by setting up the touch switching circuit 5, the operation of the touch component 3 can be controlled. When the touch switching circuit 5 is in the electrically conductive state, the current of the power supply circuit 4 flows back to ground through the touch switching circuit 5, thus short-circuiting each detection circuit. When the touch switching circuit 5 is in the electrically disconnected state, the current of the power supply circuit 4 flows back to ground through each detection circuit, allowing the driver to issue commands to zoom in or out of a certain display area. Therefore, by setting up the touch circuit, when the vehicle is in normal driving and there is no need to zoom in or out of multiple display areas on the instrument panel, the touch switching circuit 5 can be electrically conductive, thus short-circuiting each detection circuit, further reducing the risk of accidental touches by the driver or passenger when operating the instrument panel.

[0066] Optionally, in one feasible implementation, the touch switching circuit 5 includes a first transistor 50, and the collector of the first transistor 50 is electrically connected to the output terminal of the power supply circuit 4, while the emitter is grounded. When controlling the touch switching circuit 5 to be electrically turned on or off, the first transistor 50 can be controlled to be electrically turned on or off, thereby making the touch switching circuit 5 be in an electrically on or electrically off state. Furthermore, the transistor can complete the on / off operation in a very short time, with a response speed far exceeding that of traditional mechanical switches. This results in a fast response speed when the touch switching circuit 5 switches between an electrically on or electrically off state, making the driver's operation smoother and reducing the risk of delays.

[0067] Furthermore, since transistors are made of semiconductor materials, there are no physical contact wear or poor contact issues, avoiding the risk of electrical sparks, thus significantly improving circuit reliability and lifespan, and further enhancing vehicle safety.

[0068] The structure and configuration of power supply circuit 4 will be further explained below.

[0069] In one implementation, such as Figure 2 As shown, the power supply circuit 4 includes a DC-DC converter 41 and a second transistor 40 connected in series. The input terminal of the DC-DC converter 41 is electrically connected to an external power supply, and the output terminal of the DC-DC converter 41 is electrically connected to the collector of the second transistor 40. By setting the DC-DC converter 41, the current from the external power supply can be converted into a current that meets the load requirements, while simultaneously achieving voltage stabilization and electrical isolation of the power supply circuit 4. The emitter of the second transistor 40 is electrically connected to the input terminal of each detection circuit, and the emitter of the second transistor 40 is electrically connected to the collector of the first transistor 50.

[0070] Furthermore, the power supply circuit 4 also includes a first voltage divider resistor 42 and a third transistor 43 connected in series. The input terminal of the first voltage divider resistor 42 is electrically connected to the circuit between the output terminal of the DC-DC converter 41 and the collector of the second transistor 40. The output terminal of the first voltage divider resistor 42 is electrically connected to the collector of the third transistor 43, and the emitter of the third transistor 43 is grounded.

[0071] Furthermore, the power supply circuit 4 also includes a current-limiting resistor 44, one end of which is electrically connected to the circuit between the output terminal of the first voltage divider resistor 42 and the collector of the third transistor 43, and the other end is electrically connected to the base of the second transistor 40.

[0072] Specifically, when this display instrument requires an external power supply to power the power supply circuit 4, a weak current is supplied to the base of the third transistor 43 through the instrument power chip, causing the third transistor 43 to conduct. At this time, the current supplied by the external power supply flows to ground after passing through the DC-DC converter 41, the first voltage divider resistor 42, and the conducting third transistor 43, forming a current-limiting loop. Furthermore, due to the presence of the second voltage divider resistor 45, the current-limiting loop has voltage, thus supplying power to the current-limiting resistor 44 and turning on the second transistor 40, completing the power supply to the detection circuit. Therefore, the power supply circuit 4, while supplying power to the detection circuit, also forms a current-limiting loop to limit the current, further ensuring circuit safety and making this automotive display instrument more reliable.

[0073] Optionally, in one embodiment, the display instrument further includes a second voltage divider resistor 45, which is connected in series between the output terminal of the power supply circuit 4 and the input terminal of each detection circuit; the collector of the first transistor 50 is electrically connected to the circuit between the emitter of the second transistor 40 and the second voltage divider resistor 45.

[0074] Furthermore, the display instrument also includes a third voltage divider resistor 46, one end of which is electrically connected to the output terminal of each detection circuit and the emitter of the first transistor 50, and the other end is grounded.

[0075] Furthermore, the display instrument also includes a controller 6. The detection terminal of the controller 6 is electrically connected to the detection point of each detection circuit. The detection terminal of the controller 6 is also electrically connected to the base of the first transistor 50 and the base of the third transistor 43, respectively. A fourth voltage divider resistor 47 is connected in series in the electrical connection line between the detection terminal of the controller 6 and the detection point of each detection circuit. A fifth voltage divider resistor 48 is connected in series in the electrical connection line between the detection terminal of the controller 6 and the base of the first transistor 50. A sixth voltage divider resistor 49 is connected in series in the electrical connection line between the detection terminal of the controller 6 and the base of the third transistor 43.

[0076] Specifically, voltage divider resistors are installed on multiple circuits of this display instrument. These resistors reduce the voltage surges on the corresponding load components, preventing damage to the components due to excessive voltage. This makes the display instrument safer and more reliable to use, and extends its service life.

[0077] Furthermore, by setting up a controller 6, the detection terminal of the controller 6 is electrically connected to the detection point of each detection circuit. This allows the controller 6 to detect the voltage signal on the detection circuit and control the magnification or reduction of the display area on the display screen 1 based on the voltage signal. Additionally, the detection terminal of the controller 6 is also electrically connected to the base of the first transistor 50 and the base of the third transistor 43, respectively. This allows the controller 6 to control the electrical conduction or deactivation of the first transistor 50, thereby achieving the purpose of turning the touch switching circuit 5 on or off. The controller 6 can also conduct the current supplied by the instrument power chip to the third transistor 43, and limit the current in the circuit, ensuring circuit safety.

[0078] It should be noted that, Figure 2 The diagram shows multiple controllers 6, the purpose of which is to more clearly illustrate the circuitry of the display instrument. In reality, there is only one controller 6, and the controller 6 is provided with multiple pin terminals to enable connection to different components.

[0079] The following provides a further explanation of the location of the touch component 3 and the arrangement of the multiple sensing capacitors 30.

[0080] In one implementation, such as Figure 1 As shown, the touch component 3 is strip-shaped and faces the display screen 1 directly. Furthermore, the touch component 3 is located at the edge of the front of the display screen 1, and multiple sensing capacitors 30 are arranged sequentially at intervals along the height direction H of the display screen 1. This design ensures that the driver's palm does not obstruct the display screen 1 when pressing the sensing capacitors 30, and reduces the risk of scratching the screen by jewelry worn by the driver (such as rings, watches, etc.). Additionally, it allows the driver to press the sensing capacitors 30 more conveniently. It should be understood that the touch component 3 can be a touchscreen, touch film, etc., and this embodiment does not limit its use.

[0081] Alternatively, in one feasible implementation, the plurality of sensing capacitors 30 are all located on one side edge of the display screen 1 along the length direction L, which further makes it easier for the driver to press the sensing capacitors 30.

[0082] Optionally, in one feasible implementation, in order to enable the touch component 3 to control as many display areas as possible on the display instrument, the plurality of sensing capacitors 30 are configured as at least three sensing capacitors 30, and along the height direction H of the display screen 1, the capacitance values ​​of the at least three sensing capacitors 30 decrease or increase sequentially from top to bottom.

[0083] Specifically, since the capacitance values ​​of at least three sensing capacitors 30 decrease or increase sequentially from top to bottom, the detection voltage value of each detection point increases or decreases sequentially, which makes it easy to match each display area with its corresponding two sensing capacitors 30 without causing control errors.

[0084] More specifically, taking three sensing capacitors as an example, we will further explain the magnification and reduction operations of this display instrument. Please refer to the table below.

[0085] Specifically, the three sensing capacitors 30 have different capacitance values, and the corresponding voltage signal variation ranges are also different. The capacitance values ​​of the three sensing capacitors are set to increase sequentially from top to bottom along the height direction H of the display screen 1, and are respectively the first sensing capacitor, the second sensing capacitor, and the third sensing capacitor; the voltage variation range of the first sensing capacitor is between 0.1V and 0.5V, the voltage variation range of the second sensing capacitor is between 1.5V and 1.9V, and the voltage variation range of the third sensing capacitor is between 3.1V and 3.5V; at the same time, the default voltage value of the first detection point is set to 0.3V, the default voltage value of the second detection point is set to 1.7V, and the default voltage value of the third detection point is set to 3.3V.

[0086] More specifically, the voltage range of each detection point is set to be reduced if it is lower than the default value, and increased if it is higher than the default value. This corresponds to the state of current change caused by the change in capacitance value of the sensing capacitor 30.

[0087] More specifically, the first and second sensing capacitors are configured to correspond to the vehicle speed display area on display screen 1. When the controller 6 detects that the voltage range of the detection point is between 1.6V and 2.0V, it initiates a reduction action between the first and second sensing capacitors (see [link to relevant documentation]). Figure 5 When controller 6 detects that the voltage range at the detection point is between 2.0V and 2.4V, it initiates an amplification operation between the first and second sensing capacitors (see [link]). Figure 4 When the controller 6 detects that the voltage range of the detection point is 4.6V-5.0V, it is a reduction action between the second and third sensing capacitors; when the controller 6 detects that the voltage range of the detection point is 5.0V-5.4V, it is an amplification action between the second and third sensing capacitors.

[0088] It should be noted that when the voltage is 2.0V or 5.0V, that is, when the first sensing capacitor and the third sensing capacitor are pressed at the same time, there will be no change in action if it is outside the above adjustment range. Of course, in case of accidental operation, the voltage range of pressing the first sensing capacitor and the third sensing capacitor at the same time can also be between 3.2V and 4.0V. If it is outside the above adjustment range, there will still be no change in action, further avoiding the occurrence of accidental touch.

[0089] In addition, when the touch adjustment zoom action ends, that is, when the finger press action ends and there is no more squeezing action on the sensing capacitor, the sensing capacitor is recharged and returns to the default state, waiting for the next action to respond.

[0090] Furthermore, in one implementation, please refer to... Figure 4 and Figure 5 To enable the driver to quickly and accurately locate the sensing capacitors 30 when operating the display instrument, multiple display icons 9 corresponding to the multiple sensing capacitors 30 can be set on the display screen 1. It should be understood that the number of multiple display icons 9 depends on the number of sensing capacitors 30, such as 2, 3, 5, etc.

[0091] Furthermore, to ensure the safety of this display instrument, it also includes a glass cover 7 and a housing.

[0092] Specifically, in the thickness direction of the display screen 1, the glass cover plate 7 is fixedly installed on the front of the display screen 1, and the touch component 3 is located between the glass cover plate 7 and the front of the display screen 1. Thus, the glass cover plate 7 can protect the touch component 3 and the display screen 1, so that the touch component 3 and the display screen 1 will not easily wear out during long-term use, even when they are frequently pressed and rubbed, thereby improving the service life of the display instrument.

[0093] More specifically, the housing has a display port that matches the glass cover 7. The circuit board 2 and the display screen 1 are both fixedly installed inside the housing, and the glass cover 7 is fixedly placed over the display port. By setting up the housing, the circuit board 2, the display screen 1 and the touch component 3 can be protected, reducing the risk of damage to the circuit board 2, the display screen 1 and the touch component 3 in the event of a car accident (such as a collision or water crossing), thus making the car safer.

[0094] Furthermore, this utility model also discloses an automobile, including the aforementioned display instrument for automobiles. Since this automobile uses such a display instrument, when using the display instrument to zoom in or out of a certain display area while driving the automobile, it is necessary to simultaneously press two adjacent display areas corresponding to the display area to be zoomed in or out of the multiple sensing capacitors 30. Pressing a single sensing capacitor 30 will not cause the display area to be zoomed in or out. Moreover, each pair of adjacent sensing capacitors 30 corresponds to one display area among the multiple display areas. Therefore, the risk of accidental touch when the driver gives a zoom-in or zoom-out command to a certain display area is reduced, enabling the driver to accurately zoom in or out of the display area to be operated.

[0095] The above description illustrates the implementation of this utility model through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details are included in the above description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0096] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0097] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0098] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0099] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

Claims

1. A display instrument for automobiles, characterized in that, It includes a display screen, a circuit board, and a touch component, wherein the circuit board is disposed on the back of the display screen, and the touch component is disposed on the front of the display screen; The touch component is provided with a plurality of sensing capacitors with different capacitance values ​​at intervals, and the circuit board is provided with a plurality of detection resistors with the same resistance value. The plurality of sensing capacitors correspond one-to-one with the plurality of detection resistors, and each sensing capacitor is connected in series with the corresponding detection resistor to form a detection circuit. The display instrument also includes a power supply circuit integrated on the circuit board. The input terminal of each detection circuit is electrically connected to the output terminal of the power supply circuit, and the output terminal is grounded. In each detection circuit, the sensing capacitor is located between the output terminal of the power supply circuit and the detection resistor, and a detection point is provided at the position between the sensing capacitor and the detection resistor. Furthermore, the display screen is provided with multiple display areas, and each pair of adjacent sensing capacitors corresponds to one of the multiple display areas. When any two adjacent sensing capacitors are pressed at the same time, the detection points on the two detection circuits where the two sensing capacitors are located output corresponding voltage signals.

2. The display instrument for automobiles as described in claim 1, characterized in that, The display instrument also includes a touch switching circuit, which can switch between an electrically on state and an electrically off state. The input terminal of the touch switching circuit is electrically connected to the output terminal of the power supply circuit, and the output terminal is grounded. The touch switching circuit is connected in parallel with each of the detection circuits. When the touch switching circuit is in an electrically conductive state, the current of the power supply circuit flows back to ground through the touch switching circuit; when the touch switching circuit is in an electrically disconnected state, the current of the power supply circuit flows back to ground through each of the detection circuits.

3. The display instrument for automobiles as described in claim 2, characterized in that, The touch switching circuit includes a first transistor, the collector of which is electrically connected to the output terminal of the power supply circuit, and the emitter is grounded.

4. The display instrument for automobiles as described in claim 3, characterized in that, The power supply circuit includes a DC-DC converter and a second transistor connected in series. The input terminal of the DC-DC converter is electrically connected to an external power supply, the output terminal of the DC-DC converter is electrically connected to the collector of the second transistor, the emitter of the second transistor is electrically connected to the input terminal of each of the detection circuits, and the emitter of the second transistor is electrically connected to the collector of the first transistor. The power supply circuit also includes a first voltage divider resistor and a third transistor connected in series. The input terminal of the first voltage divider resistor is electrically connected to the circuit between the output terminal of the DC-DC converter and the collector of the second transistor. The output terminal of the first voltage divider resistor is electrically connected to the collector of the third transistor. The emitter of the third transistor is grounded. The power supply circuit also includes a current-limiting resistor, one end of which is electrically connected to the circuit between the output terminal of the first voltage divider resistor and the collector of the third transistor, and the other end is electrically connected to the base of the second transistor.

5. The display instrument for automobiles as described in claim 4, characterized in that, The display instrument further includes a second voltage divider resistor, which is connected in series between the output terminal of the power supply circuit and the input terminal of each of the detection circuits; the collector of the first transistor is electrically connected to the circuit between the emitter of the second transistor and the second voltage divider resistor; The display instrument also includes a third voltage divider resistor, one end of which is electrically connected to the output terminal of each of the detection circuits and the emitter of the first transistor, and the other end is grounded. The display instrument further includes a controller, the detection terminal of which is electrically connected to the detection point of each of the detection circuits, and the detection terminal of the controller is also electrically connected to the base of the first transistor and the base of the third transistor, respectively; wherein, A fourth voltage divider resistor is connected in series on the electrical connection line between the detection terminal of the controller and the detection point of each detection circuit; a fifth voltage divider resistor is connected in series on the electrical connection line between the detection terminal of the controller and the base of the first transistor; and a sixth voltage divider resistor is connected in series on the electrical connection line between the detection terminal of the controller and the base of the third transistor.

6. The display instrument for automobiles as described in claim 1, characterized in that, The touch component is strip-shaped and faces the display screen directly; and, The touch component is located at the edge of the front of the display screen, and the plurality of sensing capacitors are arranged at intervals along the height direction of the display screen.

7. The display instrument for automobiles as described in claim 6, characterized in that, The plurality of sensing capacitors are configured as at least three sensing capacitors, and along the height direction of the display screen, the capacitance values ​​of the at least three sensing capacitors decrease or increase sequentially from top to bottom.

8. The display instrument for automobiles as described in any one of claims 1-7, characterized in that, The display instrument also includes a glass cover plate, which is fixedly mounted on the front of the display screen in the thickness direction, and the touch component is located between the glass cover plate and the front of the display screen.

9. The display instrument for automobiles as described in claim 8, characterized in that, The display instrument also includes a housing, and the housing has a display port adapted to the glass cover. The circuit board and the display screen are both fixedly installed inside the housing, and the glass cover is fixedly covered on the display port.

10. A car, characterized in that, Including the display instrument for automobiles as described in any one of claims 1-9.

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