JPH0326026Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a display device for a vehicle that is placed in the front part of the vehicle and displays various warnings such as the speed of the vehicle.

A conventional vehicle display device of this type has been mounted inside a dash board 11 toward the driver's seat, as shown in FIG. Therefore, the driver 13 of the vehicle has to make a relatively large shift of his/her line of sight between the line of sight 14 that looks at the display 12 and the line of sight 16 that looks ahead through the windshield 15 when driving, and the driver 13 of the vehicle has to make a relatively large line of sight 16 that looks ahead through the windshield 15 when driving. It was not good for safety. In addition, the display 12 was sometimes hidden in the shadow of the handle 17 and could not be seen.

In view of this, this invention places a display on the top of the dash board at an angle to face the windshield so that the display reflected on the windshield can be seen from the driver's seat. As a display device, a positive type liquid crystal display is provided facing the windshield, and at the same time, a light emitting display capable of displaying the same content is placed below the liquid crystal display. etc., a changeover switch that works with the light switch switches the display signal and power source at the same time to display the light-emitting display, and during the daytime, switch to display the liquid crystal display.

For example, as shown in FIG.
A positive type liquid crystal display 21 is arranged on the upper surface of the display 1 . In this figure, a recess 22 is formed on the upper surface of the dash board 11 so that the display surface of the liquid crystal display 21 and the upper surface of the dash board 11 are almost aligned, or the display is slightly below, and the liquid crystal display is displayed in the recess 22. A container 21 is installed. Further, a light emitting display 23 is arranged below the liquid crystal display 21. The light-emitting display 23 is preferably one that displays character signals or the like by emitting light, and a fluorescent display, a plasma display, an electroluminescence display, or the like is used.

The display surface of the liquid crystal display 21 faces the windshield 15 of the vehicle at a certain angle, and the driver in the driver's seat can view the display reflected by the windshield 15, that is, the display reflected on the windshield 15. A liquid crystal display 21 is provided for easy confirmation. Display on liquid crystal display 21 and light emitting display 23
The same display can be performed, and the display on these displays 21 and 23 can be switched.

For example, when displaying the speed of a car, a signal corresponding to the speed of the vehicle is selectively supplied from the speed sensor 24 to the liquid crystal display 21 or the light emitting display 23 via the changeover switch 25. At this time, power is supplied to the liquid crystal display 21 and the light emitting display 23 from the power supply 26 in the vehicle through the switch 25.
The configuration is such that the supply is switched between the two. The changeover switch 25 is interlocked with a so-called light switch, and when the surroundings are dark such as at night or in a tunnel, the changeover switch 25 is switched to the light emitting display 23 side when turning on the headlights of the car.

In such a configuration, during the daytime, when the headlight is not turned on, the changeover switch 25 is connected to the liquid crystal display 21, and therefore the liquid crystal display 21 is in the operating state.
A signal corresponding to the vehicle speed inputted from the speed sensor 24 is displayed as a numerical value. Since this display is of a positive type, only the driven display segment portion becomes black, the displayed numerical value appears black, and the background becomes transparent. This display is reflected on the windshield 15 and can be seen by the driver.

At night, the changeover switch 25 switches to the light emitting display 23 side, and at this time, the liquid crystal display 21
Since no drive voltage is applied, the entire display surface is transparent, and the light-emitting display 23 displays the speed as a numerical value in response to the speed signal from the speed sensor 24, and this display is displayed on the liquid crystal display. Display 2
1 and is reflected on the windshield 15 so that the driver can see it.

In this way, the driver does not look at the lower part of the dart board 11, but instead looks at the display reflected on the windshield 15, so the driver's line of sight changes between the line of sight looking forward while driving and the line of sight looking at the display reflected on the windshield. is smaller than the case shown in FIG. 1, which is preferable from the viewpoint of driving safety. There is no possibility that the display reflected on the windshield 15 will become a shadow of the steering wheel, and the display can be seen correctly.

Note that the light emitting display 23 is omitted and the liquid crystal display 21 is used instead.
It is conceivable to provide a light source behind the LCD and transmit the light from this light source to the liquid crystal display 21 at night, but in this case, the entire display surface is very bright and is reflected on the windshield for positive display. I don't like it. From this point of view, it is possible to use a negative type liquid crystal display, but in this case, the display will be difficult to see during the day, and the background of the displayed value will be dark, making it difficult to see the front through the windshield part where the display is reflected. becomes difficult and undesirable. However, in the case of a positive type display, the dark area reflected on the windshield is very small, and it is hardly affected by this, and you can see the front through the part of the windshield where the display is reflected. Favorable for driving safety. In order to increase the reflection efficiency on the windshield 15 and make the display on the display 21 or 23 easier to see, for example, a half mirror 27 can be attached to the inner surface of the windshield 15, facing the display 21.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional vehicle display device;
FIG. 2 is a schematic diagram showing an example of a vehicle display device according to this invention. 11...Dash board, 15...Windshield, 21...Positive type liquid crystal display, 23...
Light emitting display, 24...speed sensor, 26...power supply, 25...changeover switch linked with the light switch, 27...half mirror.

Claims (1)

[Scope of utility model registration request] A positive-type liquid crystal display is placed almost horizontally on the top of the vehicle's dart boat, facing the windshield at an angle, and a light-emitting device is placed below the positive-type liquid crystal display and can display the same information. A display device for a vehicle, comprising: a display device; and a changeover switch that simultaneously switches display signals and power sources of the positive type liquid crystal display device and the light emitting display device in conjunction with a light switch of the vehicle.