JP2007118949A - Self-diagnosis device for vehicle display device - Google Patents

Abstract

A self-diagnosis device for a vehicle display device capable of self-diagnosis of a failure of the display device with a single display device.
When it is determined that a self-diagnosis switch for instructing self-diagnosis of a vehicle display device is turned on, a signal for displaying vehicle information from the vehicle is input to the vehicle display device. (Step S11), if it is determined that no signal is input to the vehicle display device, the vehicle display device is self-diagnosed (step S15). If it is determined that a signal is input, a self-diagnosis of a system other than the vehicle display device is performed (step S29).
[Selection] Figure 3

Description

  The present invention relates to a self-diagnosis device for a vehicle display device that performs self-diagnosis of a failure of a vehicle display device that displays predetermined vehicle information.

  The vehicle is provided with a vehicle display device such as a speedometer, an engine speed meter, a fuel amount meter, an engine water temperature meter, and an od trip meter, which are display devices for displaying the state of the vehicle. Various information is input from the vehicle to the vehicle display device via a dedicated signal line, serial communication line, or the like, and the vehicle state is displayed based on the input signal.

  In such a vehicle display device, a dedicated signal line, serial communication line, or the like is provided from the vehicle in order to perform failure diagnosis of the display device, that is, to check operation abnormality of the pointer of the display device or lighting abnormality of the lighting device. Various signals are input through the display, and a self-diagnosis of a failure of the display device is performed based on the input signals.

  However, in the vehicle display device having the above-described self-diagnosis function, a failure of the display device is self-diagnosis based on various signals input from the vehicle via a dedicated signal line, serial communication line, or the like. For this reason, the self-diagnosis of the failure cannot be performed with the display device alone, that is, with the display device disconnected from the vehicle.

  The subject of this invention is providing the self-diagnosis apparatus of the display apparatus for vehicles which can perform the self-diagnosis of the failure of a display apparatus with a display apparatus single-piece | unit.

  The self-diagnosis device for a vehicle display device according to claim 1 is a self-diagnosis device for a vehicle display device that performs self-diagnosis of a vehicle display device that displays vehicle information based on a signal from the vehicle. A self-diagnosis switch for instructing self-diagnosis, first determination means for determining whether or not the self-diagnosis switch is turned on, and a signal for displaying vehicle information from the vehicle on the vehicle display device A second discriminating unit that discriminates whether or not an input is made; and when the first discriminating unit discriminates that the self-diagnosis switch is turned on, the second discriminating unit controls the vehicle display device. If it is determined that no signal is input, the vehicle display device is self-diagnosed. If it is determined by the second determining means that the signal is input to the vehicle display device, other than the vehicle display device. The Characterized in that it comprises a diagnosis unit for performing fault diagnosis systems out.

  According to a second aspect of the present invention, there is provided a self-diagnosis device for a vehicle display device, wherein the vehicle display device displays a plurality of information display means, illumination means for illuminating the information display means, and fault diagnosis for the information display means. And a selection switch for selecting whether to perform a failure diagnosis for the illumination means. When the information display means is selected by the selection switch, the information display means is self-diagnosis, and the information display means self When the diagnosis is completed and the illumination unit is selected by the selection switch, the self-diagnosis of the illumination unit is started.

  Embodiments of the present invention will be described below with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  First, based on FIG.1 and FIG.2, the structure of the self-diagnosis apparatus of the display apparatus for vehicles concerning Embodiment is demonstrated. As shown in FIG. 1, a vehicle display device D1 includes a speedometer 3, an engine speed meter (hereinafter referred to as a tachometer) 5, a fuel amount meter 7, an engine water temperature meter 9, an od trip in a meter cluster 1. A meter 11 and the like are provided. The speedometer 3 has a dial portion 3a and a pointer portion 3b, and the tachometer 5 has a dial portion 5a and a pointer portion 5b. The fuel amount meter 7 has a dial portion 7a and a pointer portion 7b, the engine water temperature meter 9 has a dial portion 9a and a pointer portion 9b, and the od trip meter 11 has a travel distance. It has a numerical value display section 11a for displaying numerical values.

  Further, the meter cluster 1 includes a warning light (check engine indicator) 63 that is turned on when the EGI system self-diagnosis is abnormal, and a warning light (anti-lock brake warning) 65 that is turned on when an abnormality occurs in the ABS. The meter cluster 1 further includes a trip switch 23 for resetting the trip meter and selecting a meter or the like for performing self-diagnosis at the time of self-diagnosis of the vehicle display device D1.

  As shown in FIG. 2, the vehicle display device D <b> 1 includes a meter drive control unit 21 and a meter illumination control unit 51. The meter drive control unit 21 has a central processing unit (CPU), ROM, RAM and the like (not shown). The meter drive control unit 21 includes a trip switch 23, a self-diagnosis switch 25 for instructing self-diagnosis of the vehicle display device D1, and a self-diagnosis power supply 27 that supplies power when performing self-diagnosis of the vehicle display device D1. Is connected. In addition, a wheel speed sensor, an engine speed sensor, a fuel amount sensor, and an engine water temperature sensor (not shown) are connected to the meter drive control unit 21, and detection information from these sensors is sent. On the other hand, the meter drive control unit unit 21 is connected to meter drive units 31, 33, 35, 37 and 39. The meter drive control unit 21 is connected to the meter illumination control unit 51.

  The meter drive control unit 21 performs control according to a control program stored in advance in a ROM or the like, thereby controlling display contents in each meter 3, 5, 7, 9, 11 based on various inputted information. In addition, during the self-diagnosis of the vehicle display device D1, a control signal for driving each meter is output to the meter driving units 31, 33, 35, 37, and 39. Furthermore, a control signal for performing self-diagnosis of the illumination unit and the warning lamp is output to the meter illumination control unit unit 51 at the time of self-diagnosis of the vehicle display device D1.

  The meter illumination control unit 51 has a central processing unit (CPU), ROM, RAM, and the like (not shown). The meter illumination control unit 51 is connected to illumination units 53, 55, 57, 59, 61 and warning lamps 63, 65 as illumination means provided for each meter 3, 5, 7, 9, 11. Yes.

  The meter illumination control unit 51 lights up the illumination units 53, 55, 57, 59, 61 in each meter 3, 5, 7, 9, 11 by performing calculations according to a control program stored in advance in a ROM or the like. While turning off and controlling the brightness, the warning lights 63 and 65 are turned on and off.

  Further, the meter illumination control unit 51 turns on / off the illumination units 53, 55, 57, 59, 61 based on the control signal from the meter drive control unit 21 even during the self-diagnosis of the vehicle display device D1. In addition, the brightness is controlled, and the warning lights 63 and 65 are turned on and off. In FIG. 2, the meter illumination control unit 51 and the meter drive control unit 21 are shown separately, but may be a control unit that integrates two units.

  Next, the operation of the self-diagnosis device for a vehicle display device will be described with reference to the flowcharts shown in FIGS. First, when it is detected in the meter drive control unit 21 that the self-diagnosis switch 25 is turned on, the self-diagnosis processing routine of the vehicle display device is entered.

  First, it is determined whether or not a signal for displaying vehicle information is input from the vehicle via a dedicated signal line or serial communication line (step S11). Here, when it is determined that no signal is input via the dedicated signal line or serial communication line, the self-diagnosis mode of the vehicle display device D1 is entered, and the self-diagnosis of the vehicle display device D1 is performed. Be started. If it is determined that a signal is input via a dedicated signal line or serial communication line, it is possible that a system other than the meter is faulty. Step S29). Since the failure diagnosis processing routine of the other system is independent of the present invention, its description is omitted.

  First, the meter drive control unit unit 21 outputs a control signal for lighting the illumination units 53, 55, 57, 59, 61 to the meter illumination control unit unit 51 with a predetermined luminance. The meter illumination control unit 51 lights the illumination units 53, 55, 57, 59, 61 with a predetermined luminance based on this control signal. The meter drive control unit 21 turns on the numerical display 11a of the od trip meter 11 and lights up the warning lights 63 and 65. Further, the meter drive control unit unit 21 sends control signals to the meter drive units 31, 33, 35, 35 so that the pointer units 3 b, 5 b, 7 b, 9 b of each meter 3, 5, 7, 9, 11 indicate 0. 37 and 39 (step 12).

  Next, gauge no. Is set to 1 (step 13), and a meter for self-diagnosis is designated. In addition, gauge No. 1 shows the speedometer 3, and gauge No. 2 indicates a tachometer 5 and a gauge No. 3 indicates a fuel amount meter 7, and gauge No. Reference numeral 4 denotes an engine water temperature meter 9.

  Next, it is determined whether or not the trip switch 23 is turned on (step 14). If the trip switch 23 is turned on, the gauge no. The pointer part 3b of the speedometer 3 which is 1 meter is operated from 0 to the maximum position. In this case, as shown in FIG. 5, the pointer angle is displayed using the numerical value display portion 11a of the od trip meter 11 (step 15).

  Next, it is determined whether or not the trip switch 23 is kept on (step 16). If the trip switch 23 is kept on, the gauge no. It is determined whether or not the pointer portion 3b of the speedometer 3, which is 1 meter, has moved to the maximum position (step 17). If the pointer portion 3b of the speedometer 3 is not moved to the maximum position, the process returns to step S15 and the operation of the pointer portion 3b of the speedometer 3 is continued.

  On the other hand, when it is determined that the pointer portion 3b of the speedometer 3 has moved to the maximum position (step 17), and then the trip switch 23 is turned off (step S18), the pointer portion 3b of the speedometer 3 reaches the maximum position. If the trip switch 23 is turned off before the operation (step S14), the gauge no. +1 (step 19), and gauge no. = 5, that is, it is determined whether or not the self-diagnosis for all meters has been completed (step 20).

  In this case, the gauge no. = 2, so the process returns to step S14 and the gauge no. The self-diagnosis of the tachometer 5 which is the second meter is performed in the same manner as the self-diagnosis of the speedometer 3. Furthermore, gauge no. No. 3 fuel quantity meter 7, gauge no. The self-diagnosis of the engine water temperature meter 9, which is a meter No. 4, is performed in the same manner.

  If it is determined in step S20 that the self-diagnosis for all the meters has been completed, the self-diagnosis of the illumination units 53, 55, 57, 59, 61 is started. That is, first, it is determined whether or not the trip switch 23 is turned on (step 21). When the trip switch 23 is turned on, the drive control unit unit 21 A control signal for controlling the luminance of the illumination units 53, 55, 57, 59, 61 is output. Based on this control signal, the meter illumination control unit 51 controls the brightness of the illumination units 53, 55, 57, 59, 61 so as to gradually increase from the minimum to the maximum. In this case, the numerical value display unit 11a of the od trip meter 11 is used to display the luminance instruction step value.

  Next, it is determined whether or not the trip switch 23 is kept on (step 23). If the trip switch 23 is kept on, the brightness of the illumination units 53, 55, 57, 59, and 61 is increased. It is determined whether or not the maximum has been reached (step 24). Here, when the luminance of the illumination units 53, 55, 57, 59, 61 is not maximized, the process returns to step S22, and the luminance of the illumination units 53, 55, 57, 59, 61 is maximized. Continue control so that it gradually becomes brighter.

  On the other hand, when it is determined that the luminance of the illumination units 53, 55, 57, 59, 61 is maximized (step 24), and then the trip switch 23 is turned off (step S25), and the illumination units 53, 55, 57, 59 , 61 is turned off before the brightness reaches the maximum (step S23), it is determined again whether the trip switch 23 is turned on (step S26), and the trip switch 23 is turned on. In this case, the lighting units 53, 55, 57, 59, 61, the warning lamps 63, 65, and the numerical value display unit 11a of the odd trip meter 11 are turned off (step S27), and it is detected that the self-diagnosis switch 25 is turned off. Then (step S28), the self-diagnosis of the vehicle display device D1 is terminated. The adjustments of the illumination units 53, 55, 57, 59, 61 and the warning lights 63, 65 may be adjusted independently and sequentially.

  According to this self-diagnosis device for a vehicle display device, signal input for displaying vehicle information from the vehicle via a dedicated signal line or serial communication line, such as when the vehicle display device D1 is removed from the vehicle body. Even in a state in which the vehicle display cannot be performed, the self-diagnosis of the vehicle display device D1 can be performed. Therefore, even during the development of the vehicle display device D1, a failure diagnosis of the vehicle display device D1 can be easily performed.

  Further, according to this self-diagnosis device for a vehicle display device, each meter or illumination unit for performing self-diagnosis is selected in order to select each meter or illumination unit for performing self-diagnosis based on the number of operations of the trip switch 23. There is no need to provide a new switch for this purpose.

  In the above-described embodiment, the illumination units 53, 55, 57, 59, 61 are turned on at the same time, and the illumination units 53, 55 are controlled by gradually increasing the brightness from the minimum to the maximum. , 57, 59, 61 are self-diagnosed, but by repeating the operation of the trip switch 23, for example, pressing for a short time (less than 2 seconds), the lighting unit that is turned on during the self-diagnosis, and further a warning A light may be selected.

  In the above-described embodiment, the trip switch 23 is used to select a meter or an illumination unit for performing self-diagnosis. However, a selection switch for selecting a meter or illumination unit for performing self-diagnosis is newly added. May be provided.

  According to this invention, it is determined by the first determination means that the self-diagnosis switch is turned on, and it is determined by the second determination means that no signal is input from the vehicle to the vehicle display device. In this case, self-diagnosis of the vehicle display device is performed by self-diagnosis means. Therefore, the self-diagnosis of the vehicular display device can be performed even in a state where a signal cannot be input from the vehicle, such as when the vehicular display device is detached from the vehicle body. Further, it is possible to easily select information display means or illumination means for performing self-diagnosis by operating the selection switch.

1 is a schematic view showing a vehicle display device according to an embodiment of the present invention. It is a block diagram which shows the self-diagnosis apparatus of the display apparatus for vehicles concerning embodiment of this invention. It is a flowchart for demonstrating operation | movement of the self-diagnosis apparatus of the display apparatus for vehicles concerning embodiment of this invention. It is a flowchart for demonstrating operation | movement of the self-diagnosis apparatus of the display apparatus for vehicles concerning embodiment of this invention. It is a figure which shows the example of a display at the time of operation | movement of the self-diagnosis apparatus of the display apparatus for vehicles concerning embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Speedometer, 5 ... Tachometer, 7 ... Fuel amount meter, 9 ... Engine water temperature meter, 11 ... Odo trip meter, 21 ... Meter drive control unit part, 23 ... Trip switch, 25 ... Self-diagnosis switch, 51 ... Meter Illumination control unit, D1 ... vehicle display device.

Claims (2)

In a self-diagnosis device for a vehicle display device that performs self-diagnosis of a vehicle display device that displays vehicle information based on a signal from the vehicle,
A self-diagnosis switch for instructing self-diagnosis of the vehicle display device;
First determination means for determining whether or not the self-diagnosis switch is on;
Second discriminating means for discriminating whether or not a signal for displaying vehicle information from the vehicle is input to the vehicle display device;
When it is determined by the first determination means that the self-diagnosis switch is turned on, it is determined by the second determination means that the signal is not input to the vehicle display device. Self-diagnosis of the vehicle display device is performed, and if it is determined by the second determination means that the signal is input to the vehicle display device, failure diagnosis of a system other than the vehicle display device is performed. A self-diagnosis device for a display device for a vehicle, comprising: a diagnostic means for performing the operation. The vehicle display device includes:
A plurality of information display means for displaying vehicle information;
Illumination means for illuminating the information display means;
A selection switch for selecting whether to perform failure diagnosis for the information display means or failure diagnosis for the illumination means;
When the information display means is selected by the selection switch, self-diagnosis of the information display means is performed, and when the self-diagnosis of the information display means is completed, the illumination means is selected by the selection switch. 2. The self-diagnosis device for a vehicle display device according to claim 1, wherein when the lighting device is operated, a self-diagnosis of the illumination means is started.

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