JP2016120878A - Display control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for notifying a driver of the state of a vehicle after an ignition switch is turned on.SOLUTION: In a power supply ECU 10 for controlling display content of a display panel 5, a pointer display section 14 displays a pointer showing the state of a vehicle. A state specification section 11 specifies whether the vehicle after an ignition switch 2 is turned on is in a travel possible state in which driving force can be output from a driving device 4 by executing a starting operation or in a travel impossible state in which power can be supplied to a power consumption device but driving force cannot be output from the driving device 4 since the starting operation is not executed. The pointer display section 14 displays the pointer to be different between a case where the vehicle is in the travel possible state or a case where the vehicle is in the travel impossible state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display control device that controls display contents in a pointer instrument.

  In a vehicle equipped with only an internal combustion engine as a vehicle driving device, the driver has confirmed that the vehicle can be started by engine operating sound after the start operation. However, since an electric vehicle such as a hybrid vehicle equipped with an electric motor as a vehicle drive device uses an electric motor without starting the engine when starting, an engine operating noise is generated even when the vehicle can start after starting operation. do not do.

  Therefore, the electric vehicle is provided with a display device that indicates to the driver that the vehicle is ready to travel (for example, Patent Document 1). In Patent Document 1, a travelable indicator lamp (READY telltale) indicating whether or not a vehicle can travel is provided below the vehicle speed description position (0 Km / h) when the vehicle is stopped, and the ignition switch is off. Discloses a technique for controlling the operation of the pointer so as to cover a part of the travelable indicator lamp.

JP 2013-143848 A

  Conventionally, a pointer instrument for a vehicle has been used in which a pointer indicates a scale on a dial plate and transmits a vehicle state to a user. A typical example of a vehicle pointer instrument is a vehicle speedometer composed of a scale board on which the vehicle speed is written and a pointer, and the user confirms the vehicle speed from a position on the scale board indicated by the pointer.

  In order to start the vehicle, the driver needs to execute a start operation to start the vehicle drive device. For example, as a procedure for a start operation in a hybrid vehicle, there is a procedure in which an ignition switch (power switch) is turned on after a brake pedal is depressed in a state where a shift lever is in a P (parking) range. As described above, when the driver appropriately executes the starting operation according to the procedure, the hybrid system including the drive device is activated, and the vehicle is ready to travel.

  However, in the above procedure, if the driver forgets to step on the brake pedal and turns on the ignition switch, the hybrid system will not start, but power will be supplied to the pointer instrument and the dial will light up, Various types of information are displayed on the display panel. For this reason, the driver may misunderstand that the vehicle is ready to travel and may attempt to start the vehicle by moving the shift lever from the P range.

  Therefore, even when the ignition switch is turned on, if the vehicle is not in a travelable state, it is preferable to inform the driver that the vehicle is not in a travelable state. The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for notifying the driver of the state of the vehicle after the ignition switch is turned on.

  In order to solve the above-described problems, a display control device according to an aspect of the present invention is a display control device that controls display contents of an in-vehicle display device, and includes a pointer display unit that displays a pointer indicating a state of the vehicle, and an ignition. The vehicle after the switch is turned on is in a travelable state in which a driving force can be output from the vehicle drive device due to the start operation being performed, or because the start operation is not being performed, A state specifying unit that specifies whether the vehicle is in a travel-disabled state in which power can be supplied but drive power cannot be output from the vehicle drive device. The pointer display unit displays the pointer differently when the vehicle is in a travelable state and when the vehicle is in a travel impossible state.

  According to this aspect, since the display mode of the pointer differs depending on whether the vehicle is in a travelable state or in a travel impossible state, the driver can travel by looking at the displayed pointer. It is possible to determine whether the vehicle is in a state where it is in a state where it is incapable of traveling.

  ADVANTAGE OF THE INVENTION According to this invention, the technique in which a driver | operator can judge easily whether it is in a driving | running | working possible state or a driving impossible state is provided.

It is a figure which shows the system configuration | structure of the hybrid vehicle of an Example. It is a figure which shows the example of a display of a display panel when a vehicle is in a driving | running | working possible state. It is a figure which shows the example of a display of a display panel when a vehicle is in a driving impossible state. It is a figure which shows the experimental result which computed the influence degree to the startable feeling. It is a figure which shows another example of a display of a display panel when a vehicle is in a driving impossible state. It is a figure which shows the experimental result which shows the relationship between the correct answer rate and the light emission change rate.

  FIG. 1 shows a system configuration of the hybrid vehicle of the embodiment. The vehicle system 1 includes a power supply electronic control unit (hereinafter referred to as “power supply ECU”) 10 that manages the power supply state of the vehicle and a hybrid electronic control unit (hereinafter referred to as “HVECU”) that controls the hybrid system including the drive device 4. 6) is provided. In the hybrid vehicle, the drive device 4 includes an engine that inputs power to the drive shaft, and an electric motor that can generate power and input / output power to the drive shaft.

  The HVECU 6 is configured as a microcomputer centering on a CPU (not shown), and includes a ROM that stores a processing program, a RAM that temporarily stores data, an input / output port, a communication port, and the like in addition to the CPU. The HVECU 6 receives data from various sensors such as a means for detecting the operation position of the shift lever and a vehicle speed sensor via an input port. The HVECU 6 is connected to an engine ECU (not shown) via a communication port, and outputs a control signal for controlling the operation of the engine to the engine ECU as necessary. The HVECU 6 is connected to the power supply ECU 10 via a communication port, and when the start signal (ST signal) is received from the power supply ECU 10, the drive device 4 is activated, and the power supply ECU 10 indicates that the activation of the drive device 4 has been completed. A ready signal (RDY signal) is output.

  The power supply ECU 10 is configured as a microcomputer centering on a CPU (not shown), and includes a ROM that stores a processing program, a RAM that temporarily stores data, an input / output port, a communication port, and the like in addition to the CPU. The power supply ECU 10 receives an operation signal from the ignition switch 2 attached to the instrument panel in front of the driver's seat, an operation signal from the brake switch 3 that detects depression of the brake pedal, and a shift from means for detecting the operation position of the shift lever. Position etc. are input via the input port. The power supply ECU 10 controls on / off of power to the display panel 5 and a power consuming device such as an audio device based on an operation signal from the ignition switch 2.

  The power supply ECU 10 connects a power supply to some electrical components every time an operation signal is input from the ignition switch 2 while a brake-off signal indicating that the brake pedal is not depressed is input from the brake switch 3. Control to switch between the accessory mode, the ignition on mode for connecting the power to all electrical components, and the ignition off mode for disconnecting the power connection to the electrical components. Note that power is supplied to the display panel 5 in both the accessory mode and the ignition-on mode.

  When the operation signal is input from the ignition switch 2 while the brake-on signal indicating that the brake pedal is depressed is input from the brake switch 3, the power supply ECU 10 sends a start signal (ST signal) to the HVECU 6. Is output to control activation of the drive device 4. When the HVECU 6 receives the ST signal, the HVECU 6 activates the driving device 4 and outputs a ready signal (RDY signal) indicating that the activation is completed to the power supply ECU 10.

  Thus, in the vehicle system 1, in order to start the drive device 4, it is necessary for the driver to turn on the ignition switch 2 with the brake pedal depressed. For this reason, even if the brake pedal is forgotten to be depressed and the ignition switch 2 is turned on, the drive device 4 is not activated due to an insufficient start operation, and the accessory mode or the ignition on mode is set. Instruments are displayed.

  At this time, the driver misunderstands that the driving device 4 is also activated by displaying the instruments on the display panel 5, and moves the shift lever to the D (drive) range to start. Sometimes. At this time, since the drive device 4 is not activated, it is naturally impossible to start, and the driver needs to start again. However, in order not to cause such a misunderstanding, the vehicle is in an inoperable state. It is preferable that the driver can easily recognize.

  The power supply ECU 10 in the embodiment operates as a display control device that controls the display content of the display panel 5 and notifies the driver that the drive device 4 is activated or not activated. The power supply ECU 10 includes a state specifying unit 11, a lighting control unit 12, an information display unit 13, a pointer display unit 14, and an effect display unit 15 as a configuration for display control.

  The state specifying unit 11 is in a state where the vehicle after the ignition switch 2 is turned on is in a travelable state in which driving force can be output from the driving device 4 when the starting operation is executed, or the starting operation is executed. Therefore, it is specified whether or not the power consumption device such as the display panel 5 can supply power, but the driving device 4 cannot output the driving force and is in a travel-disabled state.

  Specifically, when the operation signal is input from the ignition switch 2 while the brake on signal is input from the brake switch 3, the state specifying unit 11 outputs a start signal (ST signal) to the HVECU 6. When the ready signal (RDY signal) is received, it is specified that the vehicle after the ignition switch 2 is turned on is in a travelable state in which driving force can be output from the drive device 4 by the start operation being performed. .

  On the other hand, the state specifying unit 11 does not receive a ready signal (RDY signal) from the HVECU 6 even if an operation signal is input from the ignition switch 2 while the brake off signal is input from the brake switch 3. For this reason, the state specifying unit 11 can supply power to the power consuming device such as the display panel 5 because the vehicle after the ignition switch 2 is turned on is not started. It is specified that the vehicle is in an inoperable state where the driving force cannot be output.

  FIG. 2 shows a display example of the display panel 5 when the drive device 4 is activated and the vehicle is in a travelable state. The lighting control unit 12 lights the display panel 5 so that the driver can visually recognize the board surface and scale of the instruments. The display panel 5 includes instruments including a water temperature meter 20 that indicates the temperature of engine cooling water, a fuel meter 21 that indicates the remaining amount of fuel, a hybrid system indicator 30 that indicates the output and regeneration level of the hybrid system, and a speedometer 40 that indicates the vehicle speed. indicate.

  The pointer display unit 14 determines and displays the position of the pointer 34 in the hybrid system indicator 30 in accordance with the operation status of the hybrid system. A section 31 is a charge area and shows a state where energy is recovered by the regenerative braking function. A section 32 is an eco area, and shows a state where eco driving (traveling in consideration of the environment) is performed. A section 33 is a power area and indicates a state that exceeds the range of eco-driving, such as during full-open travel. Immediately after the start of the drive device 4 is completed by the driver's starting operation, the pointer display unit 14 displays the pointer 34 on the boundary between the sections 31 and 32 as shown in the figure. The ready indicator 35 is lit when the vehicle is ready to travel.

  Further, the pointer display unit 14 determines and displays the position of the pointer 41 in the speedometer 40 according to the vehicle speed. Immediately after the start of the drive device 4 is completed by the driver's starting operation, the pointer display unit 14 displays the pointer 41 at a position indicating the vehicle speed of 0 km / h as shown in the figure.

  The information display 22 is an area for displaying various information related to traveling, and the warning light / indicator light area 23 is for displaying a warning light that warns of a system abnormality or the like, and an indicator light that indicates the operating status of the system. It is an area. The information display unit 13 displays various information on the information display 22 and the warning light / indicator light area 23 based on data of various sensors.

  The effect display unit 15 displays an effect such as an opening movie on the information display 22 for a predetermined time immediately after the activation of the driving device 4 is completed. From this opening movie, the driver recognizes that the vehicle can be started.

  As described above, when the start operation is appropriately executed by the driver and the vehicle is ready to travel, the contents shown in FIG. 2 are displayed on the display panel 5.

  On the other hand, after the ignition switch 2 is turned on, when the vehicle is in an inoperable state, the power supply ECU 10 controls the display content of the display panel 5 so as to be different from the display content of the display panel 5 shown in FIG. Then, the driver is notified that the vehicle is in an inoperable state.

  As described above, when the operation signal is input from the ignition switch 2 while the brake off signal is being input from the brake switch 3, the state specifying unit 11 causes the vehicle to not start properly. Then, it is possible to supply power to the power consuming device, but it is specified that the driving device 4 is in a travel-disabled state in which driving power cannot be output from the driving device 4.

  FIG. 3A shows a display example of the display panel 5 when the vehicle is in an inoperable state. Compared to the display example shown in FIG. 2, when the vehicle is in the inoperable state, the ready indicator 35 is not displayed, and the pointer display unit 14 displays the pointer 34 at the lower end of the charge area. As described above, the pointer display unit 14 changes the position indicated by the pointer 34 between when it is in a travelable state and when it is in a travel impossible state, so that the driver can change the position of the pointer 34 shown in FIG. From the position, it can be recognized that the vehicle is in an inoperable state and that it is necessary to execute a starting operation in order to start.

  In addition, when the vehicle is in an inoperable state, the effect display unit 15 does not display an effect such as an opening movie on the information display 22. In this way, the driver can recognize that the opening movie is not displayed, so that the vehicle is in an inoperable state and a start operation needs to be executed in order to start.

  When the vehicle is ready to run, the pointer display unit 14 may display the pointer 34 so as to swing from the lower end to the upper end of the charge area. When performing such a display, the driver recognizes that the vehicle is ready to run by watching the pointer 34 move to the upper end of the charge area, but conversely the pointer 34 moves from the lower end of the charge area. If not, it becomes possible to recognize that the vehicle is not ready to run.

  FIG. 3B shows another display example of the display panel 5 when the vehicle is in an inoperable state. Compared with the display example shown in FIG. 2, when the vehicle is in the inoperable state, the ready indicator 35 is not displayed, and the pointer display unit 14 indicates the position where the pointer 34 and the pointer 41 are off the scale on the respective board surfaces. To display. It should be noted that an “OFF” mark may be attached to a position off the scale, and the pointer display unit 14 may display the pointer 34 and the pointer 41 so as to indicate the mark position. FIG. 3B shows an example in which an “OFF” mark is added to the hybrid system indicator 30. Thus, by marking the position off the scale so that the pointer 34 points to it, the driver can easily recognize that the vehicle is in an inoperable state.

  Here, the pointer 34 is displayed on the hybrid system indicator 30 so as to indicate directly below, and the pointer 41 is also displayed on the speedometer 40 so as to indicate directly below. Since there is no scale at this position, the driver is likely to notice that the display position of each pointer is abnormal. As described above, the pointer display unit 14 changes the positions indicated by the pointer 34 and the pointer 41 depending on whether the vehicle is in the travelable state or the travel-disabled state. From the positions of the hands 34 and 41, it can be recognized that the vehicle is in an inoperable state and that it is necessary to execute a starting operation in order to start. Note that the positions indicated by the hands 34 and 41 are not limited to just below, as long as they are off the scale.

The present inventor, for those who are not familiar with the display contents of the display panel 5, presented each of the display contents of the display panel 5 in various ways and presented it to the target person. Or, an experiment was conducted to confirm whether it was felt that it was impossible to start. Here as display content,
(1) Hybrid indicator scale (2) Hybrid indicator pointer 34
(3) Water temperature gauge 20
(4) Ready indicator 35
(5) Speed scale (6) Speedometer pointer 41
(7) Fuel gauge 21
These display modes were variously changed to examine the influence of each display content on the determination of whether or not it is possible to start.

  Specifically, the target person looks at the display screen in which the display mode of each display content is changed, evaluates whether or not he / she feels possible to start, and evaluates whether or not he / she can start by using multivariate analysis. The degree of influence was calculated.

  FIG. 4 shows the experimental results of calculating the degree of influence on the startability feeling. In the graph shown in FIG. 4, the vertical axis represents the partial regression coefficient, the upper side from the base axis shows the influence level that gives the impression that the vehicle can start, and the lower side from the base axis shows the influence level that gives the impression that the vehicle cannot start. Show. The graph length indicates the strength of the influence. Therefore, the long graph indicates that the influence is high, and the short graph indicates that the influence is low. Further, “ON” of the state parameter indicates that the display content is displayed, and “OFF” of the state parameter indicates that the display content is not displayed. “On (standard)” indicates that the pointer is displayed at the standard position shown in FIG. 2, and “On (below)” indicates that the pointer is displayed at the position shown in FIG.

  Of the seven display contents described above, (3) the water temperature gauge 20, (4) the ready indicator 35, and (7) the fuel gauge 21 have been found to have a low influence on the startability, and are shown in FIG. Not included in experimental results.

  As a result of this experiment, it was found that when the pointer 41 of the speedometer 40 deviates from the scale and points directly below, an impression that it is impossible to start is strongly given. In this experiment, the degree of influence when the pointer 41 was not displayed was also examined. However, when the pointer 41 is directed directly below, the impression that it is impossible to start is given more strongly than when the pointer 41 is not displayed. I also understood.

  Further, it was found that even when the scale of the speedometer 40 and the scale of the hybrid system indicator 30 are not displayed, an impression that the vehicle cannot start is strongly given. Therefore, it has been confirmed that it is also an effective method for the lighting control unit 12 to turn off the scale of the speedometer 40 and / or the hybrid system indicator 30 in order to notify that it is impossible to start.

  It should be noted that when the needle 41 of the speedometer 40 is pointed directly below and when the pointer 34 of the hybrid system indicator 30 is pointed directly below, it is more strongly impressed that the start is impossible when the needle 41 is pointed directly below. However, it was confirmed that the display in which both the hands 41 and 34 are pointed directly down impresses that it is impossible to start with a very high probability.

  FIG. 5 shows another display example of the display panel 5 when the vehicle is in an inoperable state. In the display example shown in FIG. 5, the lighting control unit 12 turns off or dims the illumination of the display panel 5 so that the driver cannot see or difficult to see the instruments. In FIG. 5, the lighting control unit 12 partially turns off the lighting so that the scales and pointers of the instruments are not displayed. However, the lighting control unit 12 turns off the lighting of the display panel 5 completely. Nothing may be displayed on the display panel 5.

  The inventor has the subject remember the display of the display panel 5 shown in FIG. 2 in advance, change the light emission change rate of the display panel 5 in various ways, and display with a short-term (1 second) peripheral vision An experiment was conducted to confirm whether the subject who saw the screen felt that he could start or was unable to start. In this experiment, a display screen with some areas of the display panel 5 completely extinguished while the other areas are completely lit, and some areas are completely extinguished can be felt as correct and possible to start if it feels impossible to start. The correct answer rate was calculated as an incorrect answer.

なお、Ｌ（ＲＤＹ）は、

で表現され、つまり図２に示す表示パネル５の各画素の輝度値を面積で積分した値である。
またＬ（ＩＧＯＮ）は、図２に示す表示パネル５の一部領域を消灯したときの、各画素の輝度値を面積で積分した値である。点灯制御部１２が表示パネル５の照明を完全消灯する領域の大きさを変更して画面を表示し、発光変化率ごとに正答率を算出した。 Here, the light emission change rate is an index indicating the degree of light extinction with respect to the integrated luminance value of the display panel 5 when the vehicle is in the travelable state shown in FIG. 2 and is expressed by the following equation.

Note that L (RDY) is

In other words, the luminance value of each pixel of the display panel 5 shown in FIG.
L (IGON) is a value obtained by integrating the luminance value of each pixel by the area when a part of the display panel 5 shown in FIG. 2 is turned off. The lighting control unit 12 changed the size of the area in which the illumination of the display panel 5 was completely turned off, displayed the screen, and calculated the correct answer rate for each light emission change rate.

  FIG. 6 shows experimental results showing the relationship between the correct answer rate and the light emission change rate. From this experimental result, it was confirmed that when the light emission change rate was 50% or more, that is, about half or more of the display panel 5 was completely extinguished, it was determined that the vehicle could not be started with a very high probability. Therefore, when the vehicle is in an inoperable state, the lighting control unit 12 turns off the light of the display panel 5 so that the rate of change in light emission is 50% or more so that the driver cannot start. It was found that they were recognized with high probability.

  In the above, this invention was demonstrated based on the Example. The embodiments are merely examples, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Vehicle system, 2 ... Ignition switch, 3 ... Brake switch, 4 ... Drive apparatus, 5 ... Display panel, 6 ... HVECU, 10 ... Power supply ECU, 11. ..State specifying unit, 12 ... lighting control unit, 13 ... information display unit, 14 ... pointer display unit, 15 ... effect display unit, 22 ... information display, 30 ... hybrid System indicator, 34 ... pointer, 35 ... ready indicator, 40 ... speedometer, 41 ... pointer.

Claims (1)

A display control device for controlling display contents of an in-vehicle display device,
A pointer display for displaying a pointer indicating the state of the vehicle;
The vehicle after the ignition switch is turned on is in a travelable state in which a driving force can be output from the vehicle drive device as a result of the start operation being performed, or the power consuming device is due to the start operation not being performed. A state specifying unit that specifies whether or not the vehicle driving device is in a travel-disabled state in which driving power cannot be output from the vehicle drive device,
The pointer display unit displays the pointer differently when the vehicle is in a travelable state and when the vehicle is in a travelless state;
A display control device characterized by that.

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