JPH0710938Y2 - Vehicle display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicular display device, and more particularly to a vehicular display device for indicating to a driver a shift position of an AT (automatic transmission) at the time of starting.

[Prior Art] AT vehicles equipped with an automatic transmission have advantages such as being able to automatically start without operating a clutch and not requiring a gear change operation for acceleration, and are more advantageous than MT (manual transmission) vehicles. It is already popular enough to account for nearly 50% of new domestic cars because complicated driving operations are largely omitted.

On the other hand, however, with the rapid increase in AT vehicles and the diversification of the user base, problems due to lack of basic operation knowledge have also occurred. In particular, the automatic starting function requires sufficient prior recognition, and if the operating procedure at the time of starting is incorrect, unexpected vehicle operation, such as creep movement, may occur, which may give occupants anxiety. .

Generally, in AT vehicles, the selector lever is the driving range R
The engine cannot be started when any of (reverse), D (drive), 2 (second) and L (low) is entered. That is, a start lock circuit in which the current of the starter flows only in the range of P (parking) or N (neutral) is provided, and sudden start at the time of engine start is prevented.

In this way, safety at the time of starting is ensured, but erroneous operation at the time of idling until entering the running state thereafter or at the very early stage of starting the vehicle becomes a problem.

Especially, when the driver tries to move forward,
If you intentionally put it in the range and entered the R range carelessly, or if you intended to put it in the R range and tried to put it in the reverse range but entered the D range, the opposite of the driver's view direction The car will start in the direction. In order to prevent this, it is necessary for the driver to recognize the erroneous operation and take appropriate measures until the vehicle enters the running state, in other words, while the vehicle body is in the stopped state.

For this reason, in the past, efforts have been made to display the shift position of the selector lever that is currently installed in a place that is easier for the driver to see. For example, Japanese Utility Model Laid-Open No. 60-62330 discloses a structure in which an AT shift position is displayed on an instrument panel in front of a driver's seat to improve visibility.

Further, in JP-A-60-59381, a display image is projected on a screen installed on a front shield or an instrument panel, and the transmittance and reflectance of this screen are controlled to recognize the display most. An adjustable display is shown for easy brightness and contrast.

[Problems to be Solved by the Invention] Problems of Prior Art However, in these conventional display devices, the driver is not able to clearly recognize the display image because the display position or the image quality of the display image is limited. Even if this is the case, there is a problem in that it is difficult to directly relate to recognition of a mistaken operation.

In other words, regardless of the display time or display content, the shift range currently entered is displayed uniformly.
No consideration has been given to the more effective and appropriate display timing for recognizing an erroneous operation, the shift range to be displayed, and the like. For this reason, there is a problem in that the display itself lacks the attention of the driver, and the driver overlooks the driver in spite of not being able to display the error notification.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems of the related art, and an object thereof is to provide a vehicle display device that allows a driver to more reliably recognize an erroneous operation of an AT at the time of starting.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a plurality of display lamps provided corresponding to each shift position of an automatic transmission, and detects from a shift position detection switch. A shift indicator that emits light to indicate a shift position based on a signal, a vehicle speed sensor for detecting a stopped state of the vehicle, and the shift indicator and the vehicle speed sensor are connected, and the vehicle speed signal from the vehicle speed sensor is equal to or less than a predetermined value. And a head-up display means for enlarging and displaying a predetermined shift position signal from the shift indicator in the driving field of view.

[Operation] In the present invention, the current shift range is displayed on the head-up display means based on the transmission from the shift indicator only when the vehicle speed signal from the vehicle speed sensor is equal to or less than a certain value, that is, before the vehicle starts. It is projected and displayed on the screen. When the vehicle enters the running state and the vehicle speed increases, the image projection on the display screen is stopped.

As the shift range projected on the display screen, only a range that is highly necessary for recognizing a misoperation can be selected.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a structural example of a vehicle display device according to the present invention. In the figure, the output terminal 10 of the ignition switch
A shift position detection switch 12 for detecting the shift position of the AT is connected to the, and includes a plurality of switching terminals provided for each shift range. Shift position detection switch 12
Each output side terminal corresponds to each display lamp of the AT shift indicator 14 arranged in an instrument panel (not shown).

Of these, the resistance R ₁ for dimming is connected to each of the forward range D, 2 and L lamps, and the resistance R ₂ for nighttime dimming is connected to all the display lamps P to L. Has been done. On the other hand, the tail terminal 16 is connected to a lighting bulb 18 whose output side is grounded.

Thus, during the day, current from each display lamp P~L flows from the illumination bulb 18 through the diode D ₄ to ground.

On the other hand, when the tail lamp switch is turned on at night or the like, the power supply voltage is applied to the point C via the tail terminal 16, so that the currents from the lamps P to L are blocked from flowing into the lighting bulb 18, and the resistance is reduced. It flows to the ground via R ₂ and is dimmed at night.

As is clear from the figure, the AT shift indicator 14
Head-up display means 22 for displaying the displayed contents more clearly and in an enlarged manner is provided, and outputs of the respective display lamps P, R, N, and D to L are input. Of these, diodes D _{1 to} D ₃ are inserted in P, R, and N to prevent signal sneak. Since all the ranges D, 2, and L are forward positions and identification between the ranges is unnecessary, signals are collectively extracted.

In the present embodiment, the head-up display means 22 is arranged on the front windshield or the rear windshield, and is composed of a control circuit, a display projection device, a display screen and the like, which are not shown.

The present invention is characterized by a head-up display means.
22 is the shift position signal from the AT shift indicator 14.
The vehicle speed signal S _v from the vehicle speed sensor 20 is input at the same time as S _{p to} S _f, and the vehicle speed signal S _v is within a predetermined range indicating the stopped state of the vehicle, and in the present embodiment, a speed of 1 km / h or less is set. Only in the case indicated is the input shift position signal displayed in enlarged form on the display screen.

Therefore, the display of the shift position on the display screen is performed only immediately before the start of the vehicle in which the vehicle is in a complete or almost stopped state, which is a time when the driver is required to warn of an incorrect operation. Then, after entering the running state, the enlarged display on the screen is no longer necessary, and the vehicle speed signal S _v is
It will stop when it exceeds 1 km / h.

Next, the operation will be described.

First, when the driver turns on the ignition switch,
A voltage is applied to the ignition terminal 10, which causes the corresponding indicator lamp of the AT shift indicator 14 to light via the switching terminal of the neutral safety switch 12 which is currently closed. As described above, since the safety device is arranged so that the current does not flow to the starter unless the shift range at the time of engine start is P or N, the lighting lamp at this point is either P or N.

After that, the driver shifts the shift lever to the driving range D,
When it is set to either 2 or L, the corresponding display lamp of the AT shift indicator 14 is turned on, and the image showing the corresponding shift range is enlarged and projected and displayed on the screen of the head-up display means 22.

The image displayed on this screen is the vehicle speed signal S _v
Is less than 1 km / h, it is understood that this is also a necessary and sufficient period for recognizing the misoperation.

In this way, the AT shift range is enlarged and displayed on the display screen just before the start of the vehicle. Then, the driver can confirm at a glance whether or not it is within the desired range by the image corresponding to the current shift range clearly projected on this screen. Can be taken.

That is, the fact that the image is projected on the display screen means that the vehicle has not started yet, so that the driver can reset the shift lever with a sufficient margin.

After that, if the vehicle starts and shifts to the running state, the image display is stopped because the vehicle speed signal S _v exceeds a predetermined value, and the AT
When the shift position signals S _{p to} S _f from the shift indicator 14 are input to the head-up display means 22, no image appears on the display screen. As a result, unnecessary display during traveling as in the prior art is prevented, and it does not hinder driving.

As described above, according to the present embodiment, by displaying the image of the shift position on the head-up display means 22 only at a specific time necessary and sufficient for the recognition of the erroneous operation immediately before the start state, it is extremely possible. It is possible to effectively recognize an erroneous operation.

Next, a second preferred embodiment of the present invention will be described.

What is characteristic of this embodiment is that the head-up display means 22 is arranged in the driver's front view and rear view, for example, both in the vicinity of the front windshield and in the vicinity of the rear windshield. Therefore, for example, the current shift position can be known even when the driver is facing backward, and higher visibility can be obtained.

Further, as a third embodiment, only the reverse (R) range is provided to the head-up display means provided in the front view in the second embodiment, and the forward (D) range is provided to the head-up display device provided in the rear view. It is possible to display only the 2 or L) range respectively.

According to the third embodiment, the image display on the display screen is a warning display as it is, and the driver can immediately recognize that the operation is incorrect at the same time that the image appears on the screen.

In other words, as long as the image does not appear, there will be no sudden backward movement in the state of visual recognition in the forward direction or sudden forward movement in the state of visual recognition in the rear direction, and the driver need only pay attention to the appearance of this image. . Therefore, a more excellent warning effect and erroneous operation recognition effect can be obtained.

[Effects of the Invention] As described above, according to the present invention, a specific warning image is projected only when it is determined that the vehicle is in a stopped state at the time of occurrence, so the driver may overlook this. Therefore, it is possible to recognize an erroneous operation extremely accurately and take appropriate measures, and it is possible to prevent the unexpected occurrence of vehicle motion such as sudden start or sudden reverse.

[Brief description of drawings]

FIG. 1 is a structural example of a vehicle display device according to the present invention. 12 ... Shift position detection switch 14 ... AT shift indicator 20 ... Vehicle speed sensor 22 ... Head-up display means _Sp , _Sr , _Sn , _Sf ... Shift position signal _Sv ... Vehicle speed signal

Claims (3)

[Scope of utility model registration request] 1. A shift indicator, which has a plurality of display lamps provided corresponding to each shift position of an automatic transmission, and which displays a shift position by light emission based on a detection signal from a shift position detection switch; A vehicle speed sensor for detecting a stopped state, connected to the shift indicator and the vehicle speed sensor, when the vehicle speed detection signal from the vehicle speed sensor is below a predetermined value, the shift position signal from the shift indicator is enlarged and displayed in the driving field of view. A vehicle display device comprising: 2. The device according to claim 1 of the utility model registration, wherein the head-up display means is provided both in a front view and a rear view of a driver. Display device. 3. A device according to claim 2 of the utility model registration, wherein the head-up display means provided in the front field of view is provided with only the shift position of the backward range and in the rear field of view. A display device for a vehicle, wherein only the shift position of the forward range is displayed on the up display means.