JPH0490934A - Vehicle display device - Google Patents

Abstract

PURPOSE:To protect a display from a thermal damage during parking, by a method wherein a screening plate is protruded at a screening position between a projection plate and a lens that projects the display of an operation information display on the projection plate, at the time of a parking condition is detected, and retracting it from the screening position at the time of non- parking. CONSTITUTION:When a tilt steering wheel 14 is sprung up from a normal position shown by full lines to a position shown by an imaginary line at the time of parking, a pulley 12 in linkage with the support shaft of a steering core 11 is turned in the arrow direction. Accordingly, a pulley 9 is rotated, as shown by an arrow, by means of a belt 13, and a cover 6 meshing with a gear 8 is moved in the arrow direction, and a window 3 is closed. Accordingly, sunlight S is prevented from radiating on a displayer 1, and protection from a thermal damage is conducted. When a parking condition ceases and the wheel 14 is returned to the former position, the window 3 is opened by means of the reverse action, and the light passage of a display light A becomes open.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a display device for a vehicle that projects driving information such as vehicle speed onto a projection plate such as a windshield and displays it from a far point.

(Prior Art) As a vehicle display device that displays driving information such as vehicle speed, a head-up display device that projects display light onto a windshield to form a virtual image in the field of view outside and in front of the vehicle has been known. ing. The vehicle display device described in Japanese Unexamined Patent Publication No. 61-211139 is one type of such display device, and in this case, the display light emitted from the display device is projected onto the windshield through a convex lens, so that it is visible to the driver while driving. It is constructed to focus a magnified image at a position in front of the eye near the focal point of the eye.

(Problem to be Solved by the Invention) When the lens is used in the head-up display device as described above, an enlarged display image can be displayed at a far point where the driver does not need to change his line of sight significantly.

However, in this case, since there is a lens in the optical path, sunlight may be focused on the display depending on the vehicle posture.
If such concentrated sunlight continues for a long time while the vehicle is parked, the display may malfunction due to heat damage.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device for a vehicle that can prevent heat damage to the display device while the vehicle is parked.

(Means for Solving the Problems) The present invention is configured to automatically block the optical path between the display and the lens when parking the vehicle so as to prevent heat damage. That is, the vehicle display device according to the present invention includes a display device that displays driving information by emitting light, a projection plate on which the display of the display device is projected, and a display device disposed between the projection plate and the display device. a lens, a light shielding member that is freely provided on an optical path passing through the lens, a parking state detection means for detecting a parking state, and when the parking state detection means detects parking, the light shielding member is arranged to extend and retreat from the light path passing through the lens. The vehicle is characterized by comprising a driving means for projecting the light shielding member to a position where it blocks the light path and retracting the light shielding member to a position where it does not block the light path when the vehicle is not parked.

More specifically, the vehicle display device can be configured to protrude and retreat in conjunction with the operation of a tilt steering device that flips upward when the vehicle is parked.

(Function) When parking, according to the parking detection by the parking state detection means,
Or, more specifically, the tilt steering device itself, which flips upward when parking, functions as a parking state detection means, and in conjunction with its operation, the drive means is activated, whereby the light shielding member blocks the optical path through the lens. . Therefore, when the vehicle is parked, sunlight is blocked and prevented from concentrating on the display through the lens.

Further, when the vehicle is operated, the light shielding member is retracted to a position where it does not block the optical path, and at this time, driving information can be displayed from a far point without any problem.

(Example) Examples will be described below based on the drawings.

The figure is an overall schematic diagram showing one embodiment of the present invention.

In the figure, I is a display device that displays driving information such as vehicle speed by emitting light, and is arranged inside the instrument panel 2 facing upward. Further, a window 3 is provided on the upper surface of the instrument panel 2 and is located above the display 1, and a convex lens 4 is disposed between the window 3 and the display 1.

The display light emitted by the display device 1 passes upward through the convex lens 4 as shown by arrow A in the figure, enters the surface of the windshield 5 at an angle, and is reflected toward the vehicle interior. Thereby,
1. The windshield 5 is connected to a projection plate. A virtual image is formed at the forward far point position, and this appears to overlap the foreground within the driver's field of vision, displaying driving information.

The window 3 (III) of the instrument panel 2 is provided with a horizontally movable cover 6 that allows the window 3 to be opened and closed, and teeth 7 are provided in the shape of a rack on the back surface of the cover 6. A gear 8 that meshes with the teeth 7 of the cover 6 is rotatably supported on the instrument panel 2 side, and a pulley 9 is integrally provided at one end of the gear 8. A flip-up type tilt steering device 10 is provided, and a pulley 12 that rotates in conjunction with the vertical movement of the steering core 11 is provided on the vertical movement support shaft of the steering core 11, and this pulley 12 and the gear 8 A toothed belt 13 is stretched between the pulley 9 and the integrated pulley 9. In the figure, 14 is a steering wheel;
15 is various meters.

The mechanism of the flip-up type tilt steering device 10 is as follows:
This is known per se, and a tilt motor is driven and controlled in response to a signal from a keyless switch attached to a key cylinder into which an ignition key is inserted, and when the key is removed from the key cylinder when parking, the steering wheel is raised. It is configured to flip up. The tilt steering device 10 may be configured to determine and control the parking state based on, for example, vehicle speed, parking brake, and door opening conditions, and various other conditions for determining the parking state can be set. .

The boe ratio of two pulleys 9 and 12 and these pulleys 9
12 and the cover 6, when the tilt steering device 10 is in the normal position, the cover 6 is retracted to the position where the window 3 is fully opened, and when the tilt steering device IO is flipped up, the cover 6 is retracted to the position where the window 3 is fully opened. It is set to protrude to the fully closed position. As a result, when the steering wheel 14 flips up from the normal position shown by the solid line in the figure as shown by the imaginary line during parking, the steering core 1
1, the pulley 12 rotates to the left as shown by the arrow in the figure, and the rotation of this pulley I2 is transmitted by the toothed belt 13, so that the pulley 9 on the gear 8 side rotates as shown by the arrow. As shown, it still rotates to the left. Then, the cover 6 engages with the gear 8 and moves to the left as shown by the arrow in the figure.
Close window 3. Further, when the vehicle is no longer in the parking state and the tilt steering device IO is lowered to the normal position, the cover 6 is opened by the operation opposite to the above. Therefore, while driving, the display 1 displays driving information from a far perspective without any problems, while when parking the vehicle, the sun's rays (indicated by arrow S in the figure) are blocked and focused on the display l through the lens. be prevented from doing so.

In the above embodiment, the cover (light shielding member) is extended and retracted via a belt and gear mechanism in conjunction with the operation of the tilt steering device that flips upward when parking. Various other means can be used to move the member in and out.

Further, in the above embodiment, a cover (light shielding member) is disposed between the window of the instrument panel and the lens, but a light shielding member may also be provided between the display and the lens.

(Effects of the Invention) Since the present invention is configured as described above, in a vehicle display device that displays driving information from a far perspective, it is possible to prevent heat damage to the display device caused by sunlight while the vehicle is parked.

[Brief explanation of the drawing]

The figure is an overall schematic diagram of an embodiment of the present invention. 1: Display, 4 Convex lens, 5/Windshield, 6
Cover (light shielding member), 8 gear, 9□ 12, pulley,
10 tilt steering device, 13: toothed belt.

Claims (2)

[Claims] (1) A display that displays driving information by emitting light, a projection plate on which the display of the display is projected, a lens disposed between the projection plate and the display, and an optical path passing through the lens. a light shielding member provided to be movable in and out; a parking state detecting means for detecting a parking state; and when the parking state detecting means detects parking, the light shielding member is projected to a position to block an optical path passing through the lens, and when the parking state is not parked. A display device for a vehicle, comprising: a drive means for retracting the light shielding member to a position where it does not block the optical path. (2) A display device that displays driving information by emitting light, a projection board on which the display of the display device is projected, a lens disposed between the projection board and the display device, and an optical path passing through the lens. A light shielding member is provided to be able to move in and out, and when the vehicle is parked, the light shielding member is protruded to a position that blocks the optical path passing through the lens in conjunction with the operation of a tilt steering device that flips upward when the vehicle is parked, and when the vehicle is not parked, the light shielding member is moved upwardly. A display device for a vehicle, comprising: a driving means for retracting the display device to a position where an optical path is not obstructed.