JPH0534023U - Heads-up display device for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] Without complicating the configuration of the display, notify the driver immediately and reliably when an abnormal situation occurs, and display the content of the abnormality on the warning display section of the combination meter. An object of the present invention is to provide a head-up type display device for a vehicle, which can be immediately confirmed by. [Structure] A head-up type display device is provided separately from a vehicle display device having a speedometer and a warning display section arranged on an instrument panel and is used as an auxiliary. The display image of the digital display 12 that displays the vehicle speed
The image is projected and displayed on a translucent reflector arranged in the front view of the driver's seat. In response to the input of a warning signal for displaying a warning on the warning display section, the display control means 11 changes the display of the digital display to a predetermined sign for notifying the occurrence of the warning.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is provided as an auxiliary device separately provided from a vehicle display device for displaying vehicle speed and various warnings arranged on an instrument panel of a vehicle, and in particular, a light emitting digital display for displaying vehicle speed. The present invention relates to a head-up type display device for a vehicle, which projects and displays a display image of a display device on a translucent reflection plate arranged in the front visual field of a driver's seat.

[0002]

[Prior Art]

 As a conventional display device of this type, there is one shown in FIG. 5, for example. In the illustrated display device, a display unit 2 is embedded in a dashboard 1 in front of a driver's seat, and a windshield 3 in front of the driver's seat is provided with a translucent reflection processing surface 3a for reflecting a display image from the display unit 2. The display image of the display unit 2 can be read by the reflection processing surface 3a together with the scene in front of the vehicle, and the display image 4 which is an upright virtual image of the display of the display unit 2 can be read. Reference numeral 5 is the driver's range, 4a is a digital display value of the speed obtained by the driver visually recognizing the display image 4, and 6 is the steering wheel of the vehicle.

This vehicle head-up type display device allows a display image 4 to be visually recognized by superimposing it on a scene in front of the vehicle, and as shown in FIG. 6, it is a combination which is conventionally provided on the surface of the instrument panel 1a. Compared to reading the vehicle speed value by looking at the vehicle speed display of the speedometer 7a in the meter 7, the amount of movement of the line of sight from the driving state is reduced, which contributes to safe driving.

[0004]

[Problems to be solved by the device]

 However, when such a head-up type display device is mounted, since the vehicle speed display that can be visually recognized in the driving state is exclusively watched in the driving state, the chance of seeing the display of the combination meter 7 is reduced. Therefore, there is a problem that even if the warning display is displayed by turning on the lamp 7c of the warning display portion 7b in the combination meter 7, there is a risk that it may be delayed to notice the abnormality.

Needless to say, such a problem can be solved by making the head-up type display device also perform individual warning display, but this makes the structure of the display unit of the display unit complicated and large. In addition to increasing the cost, it causes another problem such as economically unfavorable because it overlaps with that of the warning display gacombination meter.

Therefore, in view of the above-mentioned conventional problems, the present invention not only makes the configuration of the display device complicated, but also promptly and surely informs the driver of an abnormal situation in response to the occurrence of an abnormal situation, thereby making it possible to detect abnormalities. An object of the present invention is to provide a vehicle head-up type display device whose contents can be immediately confirmed by the warning display section of the combination meter.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, a vehicle head-up type display device according to the present invention is a vehicle display having a speedometer arranged on an instrument panel of a vehicle for displaying a vehicle speed and a warning display section for displaying various warnings. A head-up type for vehicles, which is provided separately from the device and is used as an auxiliary device to project and display the display image of a digital display that displays the vehicle speed on a translucent reflector installed in the front field of view of the driver's seat. The display device is provided with display control means for changing the display of the digital display to a predetermined sign indicating the occurrence of a warning in response to the input of a warning signal for displaying a warning on the warning display section. ..

[0008]

[Action]

 According to the above configuration, the display control means changes the display of the digital display to a predetermined sign indicating the occurrence of the warning in response to the input of the warning signal for displaying the warning on the warning display section. By changing to a sign that notifies the occurrence of a warning, it is possible to know the occurrence of a warning. Moreover, the contents can be known by the display on the warning display section of the display device arranged on the instrument panel of the vehicle.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit configuration showing an embodiment of a vehicle head-up type display device according to the present invention. In FIG. 1, reference numeral 11 is a display control unit constituted by a microcomputer (CPU) operating according to a predetermined control program. , 12 is a three-digit light emitting type digital display consisting of a fluorescent display tube. The uppermost digit consists of 2 segments and the lower two digits consist of 7 segments. Reference numeral 13 denotes a driver that drives the digital display 12 according to the display data output by the display control unit 11.

The display control unit 11 inputs a traveling pulse whose period is shortened in proportion to the vehicle speed according to the traveling of the vehicle generated by a traveling sensor (not shown), and calculates based on the inputted traveling pulse. The vehicle speed is obtained, and vehicle speed display data for causing the digital display 11 to display the vehicle speed as a digital value according to the obtained vehicle speed is output. The display control unit 11 also inputs a warning signal via the OR gate 14, and an alarm sign for causing the digital display 12 to perform a sign display for informing the driver that the warning signal is generated in response to the input. Output display data.

Examples of the warning signal include a charging voltage warning signal generated when the battery charging voltage drops below a predetermined value, a brake warning signal generated when side braking is applied, and an air pressure below a predetermined value. There is an air pressure showering signal generated when the oil pressure is lower than a predetermined value, an oil pressure showering signal generated when the oil pressure is lower than a predetermined value, and an oil fill towering signal generated when the oil filter is abnormal. Of the warning signal is input to the age circuit 14 to be ORed, and the warning signal is input to the display controller 11 in response to the generation of an arbitrary warning signal.

FIG. 2 shows a specific configuration example of how to input the above-mentioned warning signal, and a warning display unit in a combination meter arranged on an instrument panel of a vehicle has a lamp L1 corresponding to each warning display. To L5 and the sensor switches SW1 to SW5 are connected in series between the ignition switch (IGN) and the ground, and the cathodes of the diodes D1 to D5 are connected to the respective connection points of the lamp and the sensor switch. The anodes are interconnected and then connected to the DC power supply V _CC via the resistor R and directly to the display control unit 11. The diodes D1 to D5 form a diode or circuit.

Now, when the battery charge voltage of the sensor switch SW1 drops below a predetermined value, when the sensor switch SW2 applies side braking, when the sensor switch SW3 has an air pressure below a predetermined value, the sensor switch SW4 turns on. When the oil pressure is below the specified value and the sensor switch SW5 is turned on when there is an abnormality in the oil filter, any sensor switch is turned on and the corresponding lamp is lit and the combination meter When the warning display is performed on the warning display, the corresponding diode is also turned on and the input of the display control unit 11 which has been at the voltage of the DC power supply V _CC until then is lowered to substantially the ground potential. It can be determined that the warning signal is input.

When the warning signal is input, the display control unit 11 replaces the vehicle speed display data, which has been output to display the digital value corresponding to the vehicle speed on the digital display 12 until then, and is shown in FIG. In this way, the sign display data for blinking the AL (Alarm) sign that notifies the occurrence of the warning using the 7 digits of the lower 2 digits is output.

When the vehicle speed is displayed on the digital display 12 as a digital value and the vehicle speed exceeds a predetermined value, the control display unit 11 does not perform the AL display. Make a warning by flashing the vehicle speed display.

The details of the operation outlined above will be described below with reference to the flowchart of FIG. 4 showing the work performed by the CPU constituting the display control unit 11 in accordance with a predetermined program.

The display control unit 11 starts its operation when the power is turned on by turning on the IGN switch, and determines whether or not a traveling pulse has been input in the first step S1. When this determination is YES, that is, when the traveling pulse is input, the process proceeds to step S2, and pulse measurement such as the period of the traveling pulse is performed according to the relationship with the traveling pulse input in the past. After that, the process proceeds to step S3, the vehicle speed is calculated based on the result of the pulse measurement in step S2, and then the process proceeds to step S4.

In step S4, it is determined whether or not a warning signal is input. If the determination is NO, the process proceeds to step S5, and a digital value corresponding to the vehicle speed calculated by the above step S3 is digitally displayed. It outputs the vehicle speed display data for the device 12 to perform. In step S6 thereafter, it is determined whether or not the vehicle speed is equal to or higher than a preset predetermined value. If the determination is NO, the process returns to step S1. If the determination is YES, the process proceeds to step S7 to blink the vehicle speed display. How to output vehicle speed display data Return to step S1.

On the other hand, when the determination in step S1 is NO, that is, when the traveling pulse is not input, the steps S2 and S3 are skipped and the process proceeds to step S4. In this step S4, it is determined that the warning signal is input. If so, the process proceeds to step S8 to output the warning display data for blinking the warning sign, and then the process proceeds to step S6.

According to the embodiment of the present invention described above, when a warning requiring repair or maintenance takes precedence over running of the vehicle, a sign for notifying the occurrence of the warning is displayed instead of the vehicle speed display. Is displayed, the driver who is constantly watching the vehicle speed displayed on the digital display can easily and surely know the occurrence of a warning by changing this display. This can be easily found by the warning display on the display device placed in the instrument panel.

In the above-mentioned embodiment, the segment type fluorescent display tube is used for the digital display for displaying the vehicle speed, but this may be the dot matrix type or the segment type or dot matrix. It may be a liquid crystal display of the system.

Further, in the embodiment, the warning sign display is blinked so as to easily call attention, but it is not always necessary to blink it.

Further, the sign informing of the occurrence of the warning can be given by blinking the speed display, for example, without changing the vehicle speed display to the AL display.

[0024]

[Effect of the device]

 As described above, according to the present invention, the occurrence of the warning is notified by changing the display of the digital display that displays the vehicle speed to a predetermined sign that notifies the occurrence of the warning, and the content thereof is displayed on the instrument panel of the vehicle. The warning display section of the display device placed on the display makes it possible to know, so the driver can immediately and accurately know the occurrence of an abnormal situation without making the structure of the display unit complicated and large. In addition, the effect of being able to immediately check the details of the abnormality is obtained.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a vehicle head-up type display device according to the present invention.

FIG. 2 is a diagram showing a specific circuit example of a part of FIG.

FIG. 3 is a diagram showing a display example of a sign informing of occurrence of a warning.

FIG. 4 is a flowchart showing work performed by a control unit in FIG. 1 according to a predetermined program.

FIG. 5 is a diagram showing an example of a conventional vehicle head-up type display device.

FIG. 6 is a diagram showing a vehicle display device arranged on an instrument panel of the vehicle.

[Explanation of symbols]

1a Instrument panel 3a Translucent reflective plate (reflection processing surface) 7 Vehicle display device (combination meter) 7a Speedometer 7b Warning display unit 11 Display control means 12 Digital display

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Kazuo Suzuki Yazaki Keiki Co., Ltd. 1-7-1 Yokoi Shimada City, Shizuoka Prefecture

Claims (1)

[Scope of utility model registration request] 1. A vehicle speed, which is provided separately from a vehicle display device having a speedometer arranged on an instrument panel of a vehicle for displaying a vehicle speed and a warning display section for displaying various warnings, and is used as an auxiliary vehicle. In a head-up type display device for a vehicle for projecting and displaying a display image of a digital display for displaying on a translucent reflection plate arranged in the front field of view of a driver's seat, a warning signal for causing the warning display section to perform a warning display A head-up type display device for a vehicle, comprising display control means for changing the display of the digital display to a predetermined sign informing of the occurrence of a warning in response to the input.