Meter for vehicle

Abstract

To simplify a circuit.SOLUTION: A meter for vehicle comprises: an information display device 10 that makes an occupant visually recognize information; a control unit 20 that controls the information display device on the basis of the input signals from a plurality of vehicle interfaces 30A, 30B, 30C input via an analog input port 21; switches 31, 32, 33 paired for each of the plurality of vehicle interfaces and resistors 34, 35, 36 receiving output signals from the switches; and an input interface 41 that connects the resistor for each of the plurality of vehicle interfaces to the analog input port and is applied with a power supply voltage. The control unit determines the ON state or OFF state of the switches for each vehicle interface on the basis of the voltage applied to the analog input port, determines that the input signal from the vehicle interface related to a switch determined to be the ON state has been input via the analog input port, and controls the information display device on the basis of the input signal.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle instrument. [Background technology]

[0002] Conventionally, vehicles are equipped with vehicle meters that provide various information to occupants. These vehicle meters receive inputs from various interfaces on the vehicle side according to the information, and perform display information control on a display device such as a display and lighting control of indicators. For example, the following Patent Document 1 discloses a vehicle meter that has an analog input port (an input section to which a switch voltage is input) and includes a control means that controls an alarm device mounted on the vehicle based on the switch voltage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-020107 Summary of the Invention [Problem to be solved by the invention]

[0004] In vehicle instruments, for example, an input interface on the instrument side is provided for each interface on the vehicle side, and in consideration of the circuit configuration, there is room for simplification.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a vehicle instrument that allows for a simplified circuit. [Means for solving the problem]

[0006] The present invention comprises an information display device that allows an occupant to visually recognize information, a control unit that controls the information display device based on input signals from a plurality of vehicle interfaces input via an analog input port, a switch paired with each of the plurality of vehicle interfaces and a resistor to which an output signal of the switch is input, and an input interface that connects the resistor for each of the plurality of vehicle interfaces to the analog input port and to which a power supply voltage is applied, wherein the control unit determines whether the switch is on or off for each of the vehicle interfaces based on the voltage applied to the analog input port, and determines that an input signal from the vehicle interface related to the switch determined to be in the on state has been input via the analog input port, and controls the information display device based on the input signal. Effect of the Invention

[0007] The vehicle instrument according to the present invention consolidates input signals from multiple vehicle interfaces into one input and transmits it to the control unit. The control unit then determines the on / off state of the switch for each vehicle interface based on the voltage applied to one analog input port. Therefore, the vehicle instrument according to the present invention does not need to provide an input interface for each of the multiple vehicle interfaces, and the circuit is simplified, which makes it possible to reduce the number of parts used in the input interface and the number of analog input ports used. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a circuit configuration of a vehicle instrument according to an embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of determination data in the vehicle instrument according to the embodiment. [Diagram 3] FIG. 3 is a diagram illustrating a circuit configuration of a vehicle instrument according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle instrument according to the present invention will be described below in detail with reference to the drawings. However, the present invention is not limited to the embodiment.

[0010] [Embodiment] One embodiment of a vehicle instrument according to the present invention will be described with reference to FIGS.

[0011] Reference numeral 1 in FIG. 1 denotes a vehicle instrument according to this embodiment.

[0012] The vehicle instrument 1 includes an information display device 10 that allows a passenger to visually recognize information (FIG. 1). The information display device 10 includes, for example, an indicator such as a warning light (here, indicators 11, 12, 13) that lights up and displays information such as warning information, and a display device 14 such as a display that displays information such as image information and text information. The indicators 11, 12, 13 include, for example, indicator lamps 11a, 12a, 13a made of LEDs (light-emitting diodes), and are turned on or off depending on the information. An ignition voltage from an ignition power supply 51 is applied to the indicator lamps 11a, 12a, 13a.

[0013] The vehicle instrument 1 also includes a control unit 20 that controls the information display device 10 to display information on the information display device 10 (FIG. 1). The control unit 20 controls the information display device 10 based on input signals from a plurality of vehicle interfaces (here, first to third vehicle interfaces 30A, 30B, 30C) input via an analog input port 21.

[0014] The vehicle instrument 1 also includes switches (here, first to third switches 31, 32, 33) paired with each of the multiple vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) and resistors (here, first to third resistors 34, 35, 36) to which output signals of the switches (first to third switches 31, 32, 33) are input (FIG. 1).

[0015] The vehicle instrument 1 also includes an input interface 41 (FIG. 1) that connects resistors (first to third resistors 34, 35, 36) for each of the vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) to the analog input port 21 and receives a power supply voltage. A power supply 52 is connected to the input interface 41 via a fourth resistor 53, and a power supply voltage that has been dropped by the fourth resistor 53 is applied to the input interface 41.

[0016] The vehicle instrument 1 also includes a connector 61 that connects the vehicle side and the instrument side (FIG. 1). In the vehicle instrument 1, switches (first to third switches 31, 32, 33) for each of a plurality of vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) are arranged on the vehicle side, and resistors (first to third resistors 34, 35, 36) for each of the vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) are arranged on the instrument side. In the vehicle instrument 1, the connector 61 connects the paired switches (first to third switches 31, 32, 33) and resistors (first to third resistors 34, 35, 36) for each of the vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C). Therefore, the connector 61 includes a connector connection part for connecting a pair of switches (first to third switches 31, 32, 33) and resistors (first to third resistors 34, 35, 36) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) (FIG. 1). The connector 61 shown here includes a first connector connection part 61a for connecting the first switch 31 and the first resistor 34, a second connector connection part 61b for connecting the second switch 32 and the second resistor 35, and a third connector connection part 61c for connecting the third switch 33 and the third resistor 36 (FIG. 1).

[0017] In this vehicle instrument 1, the control unit 20 determines the on / off state of the switch (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) based on the voltage applied to the analog input port 21, and determines that an input signal from the vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) related to the switch (first to third switches 31, 32, 33) determined to be in the on state has been input via the analog input port 21, and controls the information display device 10 based on the input signal.

[0018] In this vehicle instrument 1, in order to determine the on / off state of the switches (first to third switches 31, 32, 33) for each of the vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C), the resistance values ​​of the resistors (first to third resistors 34, 35, 36) are different for each of the vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C). In the vehicle instrument 1 shown here, for example, the power supply voltage is set to "5.0V±0.1V", and the resistance values ​​of the first to fourth resistors 34, 35, 36, 53 are set to "1200Ω", "680Ω", "330Ω", and "470Ω", respectively. In addition, the first to fourth resistors 34, 35, 36, 53 shown here have a tolerance variation of the resistance value within a range of 1%.

[0019] In this vehicle instrument 1, the voltage value VA of the analog input port 21 differs for each combination of the states (on or off) of the switches (first to third switches 31, 32, 33). Therefore, in this vehicle instrument 1, the minimum value (VAmin) and maximum value (VAmax) of the voltage value VA of the analog input port 21 for each combination pattern, that is, the range of the voltage value of the analog input port 21 for each pattern, are stored as judgment data in a storage unit (not shown) (FIG. 2).

[0020] In this vehicle instrument 1, the voltage value VA of the analog input port 21 differs for each combination of the states (on or off) of the switches (first to third switches 31, 32, 33). Therefore, in this vehicle instrument 1, the minimum value (VAmin) and maximum value (VAmax) of the voltage value VA of the analog input port 21 for each combination pattern, that is, the range of the voltage value of the analog input port 21 for each pattern, are stored as judgment data in a storage unit (not shown) (FIG. 2).

[0021] The control unit 20 determines which pattern of voltage value ranges in the determination data the voltage value VA of the analog input port 21 corresponds to, and determines the on / off state of each switch (first to third switches 31, 32, 33) based on the corresponding pattern. The control unit 20 accordingly determines that an input signal from a vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) related to the switch (first to third switches 31, 32, 33) determined to be in the on state has been input via the analog input port 21, and controls the information display device 10 based on the input signal.

[0022] When the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 1, the control unit 20 in this example determines that the first switch 31 of the first vehicle interface 30A, the second switch 32 of the second vehicle interface 30B, and the third switch 33 of the third vehicle interface 30C are all in the on state (FIG. 2). In this case, the control unit 20 determines that the input signals from the first vehicle interface 30A, the second vehicle interface 30B, and the third vehicle interface 30C have been input via the analog input port 21, and controls the information display device 10 based on the input signals.

[0023] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 2, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A is in the OFF state, and that the second switch 32 of the second vehicle interface 30B and the third switch 33 of the third vehicle interface 30C are in the ON state (FIG. 2). In this case, the control unit 20 determines that the input signals from the second vehicle interface 30B and the third vehicle interface 30C have been input via the analog input port 21, and controls the information display device 10 based on the input signals.

[0024] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 3, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A and the third switch 33 of the third vehicle interface 30C are in the ON state and the second switch 32 of the second vehicle interface 30B is in the OFF state (FIG. 2). In this case, the control unit 20 determines that the input signals from the first vehicle interface 30A and the third vehicle interface 30C have been input via the analog input port 21, and controls the information display device 10 based on the input signals.

[0025] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 4, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A and the second switch 32 of the second vehicle interface 30B are in the OFF state, and the third switch 33 of the third vehicle interface 30C is in the ON state (FIG. 2). In this case, the control unit 20 determines that an input signal from the third vehicle interface 30C has been input via the analog input port 21, and controls the information display device 10 based on the input signal.

[0026] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 5, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A and the second switch 32 of the second vehicle interface 30B are in the ON state and the third switch 33 of the third vehicle interface 30C is in the OFF state (FIG. 2). In this case, the control unit 20 determines that the input signals from the first vehicle interface 30A and the second vehicle interface 30B have been input via the analog input port 21, and controls the information display device 10 based on the input signals.

[0027] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 6, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A and the third switch 33 of the third vehicle interface 30C are in the OFF state, and the second switch 32 of the second vehicle interface 30B is in the ON state (FIG. 2). In this case, the control unit 20 determines that an input signal from the second vehicle interface 30B has been input via the analog input port 21, and controls the information display device 10 based on the input signal.

[0028] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 7, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A is in the ON state, and that the second switch 32 of the second vehicle interface 30B and the third switch 33 of the third vehicle interface 30C are in the OFF state (FIG. 2). In this case, the control unit 20 determines that an input signal from the first vehicle interface 30A has been input via the analog input port 21, and controls the information display device 10 based on the input signal.

[0029] Furthermore, when the voltage value VA of the analog input port 21 falls within the range of voltage values ​​of pattern 8, the control unit 20 determines that the first switch 31 of the first vehicle interface 30A, the second switch 32 of the second vehicle interface 30B, and the third switch 33 of the third vehicle interface 30C are all in the OFF state (FIG. 2). In this case, the control unit 20 determines that the input signals from the first vehicle interface 30A, the second vehicle interface 30B, and the third vehicle interface 30C are not being input via the analog input port 21.

[0030] As described above, the vehicle instrument 1 of this embodiment collects input signals from a plurality of vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) into one input and transmits it to the control unit 20. The control unit 20 then determines the on / off state of the switches (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) based on the voltage applied to one analog input port 21. Therefore, the vehicle instrument 1 of this embodiment does not need to provide an input interface for each of the vehicle interfaces, and the circuit is simplified, making it possible to reduce the number of components used in the input interface and the number of analog input ports 21 used.

[0031] Incidentally, the vehicle instrument 1 of this embodiment may use an ignition voltage instead of the power supply voltage. In this case, however, the voltage value VA of the analog input port 21 may fluctuate due to fluctuations in the ignition voltage, which may result in erroneous determination of the state of the switches (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C). Therefore, in this case, by inputting the ignition voltage as an AD value and performing voltage correction, it is possible to correctly determine the state of the switches (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) even if the ignition voltage is used instead of the power supply voltage.

[0032] [Variations] Reference numeral 2 in FIG. 3 denotes a vehicle instrument according to this modified example.

[0033] The vehicle instrument 2 of this modification includes an information display device 10 and a control unit 20 that controls the information display device 10 based on input signals from a plurality of vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) input via an analog input port 21, as in the vehicle instrument 1 of the above-mentioned embodiment (FIG. 3). Furthermore, the vehicle instrument 2 of this modification includes switches (first to third switches 31, 32, 33) and resistors (first to third resistors 34, 35, 36) that are paired with each of the plurality of vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) as in the vehicle instrument 1 of the above-mentioned embodiment (FIG. 3). Furthermore, the vehicle instrument 2 of this modification includes an input interface 41, a power source 52, and a fourth resistor 53 as in the vehicle instrument 1 of the above-mentioned embodiment (FIG. 3). For ease of explanation, the power supply voltage is set to "5.0V±0.1V" as in the vehicle instrument 1 of the embodiment, and the resistance values ​​of the first to fourth resistors 34, 35, 36, and 53 are set to "1200Ω", "680Ω", "330Ω", and "470Ω", respectively.

[0034] On the other hand, in the vehicle instrument 2 of this modification, switches (first to third switches 31, 32, 33) and resistors (first to third resistors 34, 35, 36) for each of the multiple vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) are arranged on the vehicle side, and these are connected to the input interface 41 on the instrument side. Therefore, the connector 161 of this modification that connects the vehicle side and the instrument side is interposed between the resistors (first to third resistors 34, 35, 36) for each of the multiple vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) and the input interface 41, and connects the resistors (first to third resistors 34, 35, 36) for each of the multiple vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) and the input interface 41.

[0035] In the vehicle instrument 2 of this modified example, the control unit 20 also determines the on / off state of the switch (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) based on the voltage applied to the analog input port 21 and the determination data in Fig. 2, determines that an input signal from the vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) related to the switch (first to third switches 31, 32, 33) determined to be in the on state has been input via the analog input port 21, and controls the information display device 10 based on the input signal. Specific examples of each pattern related to this control are the same as those in the vehicle instrument 1 of the above-mentioned embodiment, and therefore will not be described here.

[0036] As described above, the vehicle instrument 2 of this modified example, like the vehicle instrument 1 of the above-mentioned embodiment, collects input signals from a plurality of vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C) into one input and transmits it to the control unit 20. Then, the control unit 20 determines the on / off state of the switches (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) based on the voltage applied to one analog input port 21. Therefore, like the vehicle instrument 1 of the above-mentioned embodiment, the vehicle instrument 2 of this modified example does not need to provide an input interface for each of a plurality of vehicle interfaces, and the circuit is simplified, which makes it possible to reduce the number of parts used in the input interface and the number of analog input ports 21 used.

[0037] Furthermore, unlike the vehicle instrument 1 of the above-described embodiment, the vehicle instrument 2 of this modified example has resistors (first to third resistors 34, 35, 36) provided on the vehicle side for each of the multiple vehicle interfaces (first to third vehicle interfaces 30A, 30B, 30C). And, unlike the vehicle instrument 1 of the above-described embodiment, the vehicle instrument 2 connects the resistors (first to third resistors 34, 35, 36) to the input interface 41 via one connector 161. Therefore, the vehicle instrument 2 of this modified example can obtain a new effect of reducing the number of connectors connecting the vehicle side and the instrument side or reducing the number of pins of the connector.

[0038] Incidentally, the vehicle instrument 2 of this modified example may use an ignition voltage instead of the power supply voltage, similar to the vehicle instrument 1 of the above-described embodiment. In this case, however, similar to the vehicle instrument 1 of the above-described embodiment, the ignition voltage is input as an AD value and voltage correction is performed, so that even if the ignition voltage is used instead of the power supply voltage, the state of the switches (first to third switches 31, 32, 33) for each vehicle interface (first to third vehicle interfaces 30A, 30B, 30C) can be correctly determined. [Explanation of symbols]

[0039] 1,2 Vehicle Instruments 10 Information display device 20 Control section 21 Analog Input Port 30A First Vehicle Interface 30B Second Vehicle Interface 30C 3rd vehicle interface 31 First Switch 32 Second Switch 33 Third Switch 34 1st resistor 35 2nd resistor 36 3rd resistor 41 Input Interface 52 Power supply 61,161 Connectors 61a First connector connection part 61b Second connector connection part 61c Third connector connection part

Claims

1. An information display device that allows a passenger to visually recognize information; a control unit that controls the information display device based on input signals from a plurality of vehicle interfaces input via an analog input port; a switch paired with each of the vehicle interfaces and a resistor to which an output signal of the switch is input; an input interface, the resistor for each of the vehicle interfaces being connected to the analog input port and to which a power supply voltage is applied; Equipped with the control unit determines whether the switch is in an on state or an off state for each of the vehicle interfaces based on a voltage applied to the analog input port, determines that an input signal from the vehicle interface related to the switch determined to be in an on state has been input via the analog input port, and controls the information display device based on the input signal.

2. 2. The vehicle instrument according to claim 1, wherein the resistance of each of the resistors is different for each of the vehicle interfaces.

3. Equipped with a connector that connects the vehicle side and the instrument side, 3. The vehicle instrument according to claim 1, wherein the connector includes a connector connection portion for connecting the pair of the switch and the resistor for each of the vehicle interfaces.

4. Equipped with a connector that connects the vehicle side and the instrument side, 3. The vehicle instrument according to claim 1, wherein the connector is interposed between the resistor for each of the plurality of vehicle interfaces and the input interface, and connects the resistor for each of the plurality of vehicle interfaces and the input interface.

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