JPS63232042A - Display device for vehicle - Google Patents

Abstract

PURPOSE:To simply change over a display mode by providing a liquid crystal panel which can be switched over in transparent or nontransparent condition according to the existence of electrification, on the back face of a half mirror while providing two types of display devices opposite to both front and back faces of the half mirror. CONSTITUTION:When a changeover switch is set to a first contact, a liquid crystal panel 50 is electrified via a driving circuit and the liquid crystal panel 50 is switched over to a nontransparent condition. In this condition, vehicle speed and engine speed which are operated by a microcomputer based on the outputs of a vehicle speed sensor and an engine speed sensor are displayed on a digital indicating instrument 40, and the displayed content of the instrument 40 is shown on a half mirror 60 as a virtual image. On the other hand, as the changeover switch is set to a second contact, the electrification to the liquid crystal panel 50 is discontinued causing the liquid crystal panel 50 to become a transparent condition and a cold cathode ray tube 30 is turned on via a driving circuit enabling the display on an analog indicating instrument 20 to be directly observed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a display device for a vehicle.

[Prior art]

Today, with the rapid spread of vehicles, not only analog display devices but also digital display devices are becoming commonplace, and opportunities for multiple drivers to share a single vehicle are also increasing. ing. Furthermore, as the number of female and younger drivers is increasing, drivers' preferences regarding the types of display devices are diversifying.

[Problem that the invention seeks to solve]

However, the display devices used in conventional vehicles are limited to either analog display or digital display, or are a mixture of both. Cannot switch to digital display only. Furthermore, even if the digital display is the same, it is not possible to easily switch to a different display pattern. Therefore, there is a problem in that a single vehicle cannot meet the diversified needs described above.

Therefore, in order to cope with such a problem, the present invention attempts to provide a display device for a vehicle in which the display mode can be easily switched as needed.

[Means for solving problems]

In order to solve this problem, the configuration of the present invention includes: a first display device including a display surface positioned toward the viewing direction inside the vehicle interior; A liquid crystal panel arranged to intersect with each other, a half mirror provided on the other surface of the first display device of this liquid crystal panel, and a second display surface located opposite to the half mirror. The present invention includes a display device and a switching means for switching the liquid crystal panel to a transparent state or a non-transparent state.

[Function and effect]

By configuring the present invention in this manner, when the liquid crystal panel is made transparent by switching the switching means, the display content on the display surface of the first display device can be visually recognized as a real image through the half mirror and the liquid crystal panel. It can be seen from the direction. Furthermore, if the liquid crystal panel is made non-transparent by switching the switching means, the display content on the display surface of the second display device can be viewed from the viewing direction as a virtual image on the half mirror. In other words, since the display contents of the first and second display devices can be selectively viewed by switching the switching means, this type of display device can be used in the same vehicle to have display contents according to the driver's preference. It can be diversified into different types of equipment.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
2 and 2 show the overall structure of a vehicle display device according to the present invention, and this display device includes a hood 10 that extends horizontally from the lower edge of the windshield of the vehicle toward the interior of the vehicle. Directly below the dash board (
(not shown) is attached to the upper edge. The display device has a mechanical analog indicator 20, and the analog indicator 20 is attached to the vertical part 11a of the support panel 11, which has a substantially U-shaped cross section and is attached to the upper edge of the dashboard. 21 in the visual direction (arrows A and B shown in Figure 1)
direction).

Further, at the boundary between the lower wall portion 11b and the vertical portion 11a of the support panel 11, the cold cathode tube 30 is disposed so as to be located directly below the indicating surface 21 of the analog finger meter 20. It lights up and fulfills the function of illuminating the instruction surface 21. In addition,
The viewing direction corresponds to the viewing direction of a passenger seated in a driver's seat inside the vehicle. Further, the analog indicator 20 displays the vehicle speed and engine rotational speed of the vehicle in an analog manner on the indicator surface 21.

The digital indicator 40 includes a hood 10 and this hood 1.
The hood 1 is attached to the upper wall portion 11c of the support panel 11 in the space between the cluster panel 12 and the cluster panel 12 assembled in parallel to the lower surface of the hood 1.
The indicating surface 41 of this digital indicating instrument 40 faces the lower wall portion 11 of the support panel 11 through an opening 12a formed in the cluster panel 12. In such a case, the gate indicator 40 digitally indicates the same physical quantity as the display content of the analog indicator 20 on the indicator surface 41. As shown in FIG. 1, the liquid crystal panel 50 extends from the tip of the cluster panel 12 to the tip of the lower wall portion 11b of the support panel 11 between the indicating surface 21 of the analog indicating instrument 20 and the indicating surface 41 of the digital indicating instrument 40. A half mirror 60 is formed on the surface of the liquid crystal panel 50 on the cluster panel 12 side. However, the liquid crystal panel 50 can be switched between a transparent state and a non-transparent state.

Next, the electric circuit configuration of the display device will be explained. Vehicle speed sensor 70 detects the vehicle speed of the vehicle and generates a vehicle speed detection signal. The rotational speed sensor 80 detects the rotational speed of the engine of the vehicle and generates a rotational speed detection signal. The microcomputer 90 calculates the speed of the vehicle and the rotational speed of the engine according to the vehicle speed detection signal from the vehicle speed sensor 70 and the rotational speed detection signal from the rotational speed sensor 80, and generates the results of both calculations as output signals. Drive circuit 10
0 indicates the indication surface 4 of the digital indicator 40 in response to the output signal from the microcomputer 90 in its operating state.
At step 1, each calculation result is digitally indicated.

The drive circuit 110 lights up the cold cathode tube 30 by its operation. The drive circuit 120 controls the liquid crystal panel 5 by its operation.
0 to a non-transparent state, and its non-operation causes the liquid crystal panel 50 to become non-transparent.
Make it transparent. The changeover switch 130 is connected at its movable contact 131 to the positive terminal of the battery Ba via the ignition switch IG of the vehicle, and the fixed contact 132 of the changeover switch 130 is connected to the positive side terminal of the battery Ba through the ignition switch IG of the vehicle.
120, and the fixed contact 133 of the changeover switch 130 is connected to the input terminal of the drive circuit 110. Thus, the changeover switch 130 supplies power from the buffer battery Ba to both drive circuits 100 and 120 via the ignition switch IG by closing the movable contact 131 to the fixed contact 132.
Activate 0. In addition, the changeover switch 130 is turned on when the movable contact 131 is turned on to the fixed contact 133, so that the battery B
Power is supplied from a to the drive circuit 110 via the ignition switch I'G, and the drive circuit 110 is activated. Note that the movable contact 131 has a double-sided constant contact 1 at its neutral position plane.
Blocked from 32,133.

In this embodiment configured as described above, when the vehicle is running with the ignition switch IG open, the movable contact 131 of the changeover switch 130 is connected to the fixed contact 13.
2, the drive circuit 120 is activated by power supplied from the battery Ba, and the liquid crystal panel 50 is brought into a non-transparent state.

Further, since the microcomputer 90 generates the vehicle speed of the vehicle and the rotational speed of the engine as output signals in cooperation with the vehicle speed sensor 70 and the rotational speed sensor 80, the drive circuit 100 receives power from the battery Ba. The digital indicator 40 is activated to digitally indicate the vehicle speed and rotational speed on its indicator surface 41 in response to an output signal from the microcomputer 90.

Then, the instruction content on the instruction surface 41 of the digital indicator 40 is displayed as a virtual image on the half mirror 60, so that the passenger can digitally visually confirm the display content of the digital indicator 40 along the direction of arrow B. In this case, since the liquid crystal panel 50 is non-transparent and functions as a light shielding plate, the virtual image on the half mirror 60 can be clearly recognized.

In this state, the movable contact 1 of the changeover switch 130
31 to the fixed contact 133, the drive circuit 100 is deactivated and the drive circuit 120 is deactivated to make the liquid crystal panel 50 transparent, and at the same time, the drive circuit 110 is activated by power supply from the buffer battery Ba. Then, the cold cathode tube 30 is turned on. As a result, the analog indicator 20
The analog instruction content can be easily viewed as a real image in the direction of arrow A through the half mirror 60 and the liquid crystal panel 50. In such a case, the illumination of the cold cathode tube 30 plays a large role as illumination for the analog indication of the analog indication instrument 20 when the vehicle is traveling at night.

As described above, only by switching the changeover switch 130, either the analog instruction content of the analog indicator 20 or the digital instruction content of the digital indicator 40 can be selectively viewed through the half mirror 60. Even if the driver of the vehicle changes, the display form of this type of display device can be freely changed to digital display or analog display according to the driver's preference. Note that for the analog indicator 20, the liquid crystal panel 50 and half mirror 60 also perform a dustproof function.

Note that in implementing the present invention, an electronic analog indicator may be used instead of the digital indicator 40, and a digital indicator 40 may be used instead of the mechanical analog indicator 20.

Furthermore, in carrying out the present invention, the present invention is not limited to the digital indicator 40 and the analog indicator 20, but generally a digital indicator and an analog indicator that display the same information, or display patterns that display the same information. It is also possible to use two different devices for digital display or analog display.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are overall configuration diagrams of the present invention. Explanation of symbols

Claims (1)

[Claims] a first display device having a display surface positioned toward a viewing direction inside a vehicle interior; a liquid crystal panel disposed across the viewing direction so as to face the display surface of the first display device; This liquid crystal panel includes a half mirror provided on the other side of the surface of the first display device, a second display device having a display surface located opposite to the half mirror, and a second display device that is configured to display the liquid crystal panel in a transparent state or in a non-transparent state. A vehicle display device comprising a switching means for switching to a transparent state.