JPS6238827Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a so-called automobile display device that is combined with a microcomputer etc. and visually displays various vehicle information on a display screen such as a CRT. When the display screen is turned on, a light-shielding hood is automatically protruded around the display screen, and the light-shielding hood blocks the display light emitted from the display screen into the vehicle interior, allowing the light from the display screen to pass through the windows of the vehicle. Reflected or reflected on the glass,
An object of the present invention is to provide a light shielding device for an automobile display device that prevents dazzling a driver.

Recently, an automotive display device that visually displays various vehicle information on a display screen by combining a microcomputer and the like has been proposed, and is about to be put into practical use. Among these display devices, display devices using CRT, LED, FLT, etc., when the surroundings are dark such as at night, the display light emitted from the display screen into the vehicle interior may be reflected on the window glass of the vehicle, or There is a problem in that the light reflects off the window glass and dazzles the driver, impeding driving safety.

The present invention solves the above-mentioned drawbacks by using a light shielding device having the structure described in the claims of the utility model registration.

Hereinafter, the configuration of the present invention will be explained with reference to the drawings.

Generally, the automobile display device 1 includes a first
As shown in the figure, it is installed in the instrument panel 2 part of the driver's seat, etc., and inside the display hood 3 there are
As shown in the figure, a light-shielding hood 6 is located above the display screen 5 such as a CRT 4 and can be protruded and retracted.
is incorporated. As shown in FIG. 4, for example, a rack 7 and a pinion 8 are attached to the rear end of the light-shielding hood 6, and a motor 9 is rotated in both forward and reverse directions by an electric circuit to be described later. The light-shielding hood 6 is configured to freely protrude from the storage position shown in FIG. 2 to the light-shielding position shown in FIG. 3, and can also be freely stored within the display hood 3.

FIG. 5 shows an electric circuit for controlling the protruding and retracting operations of the light shielding hood 6. In the figure, 10
11 is an ignition switch, 11 is a small lamp switch that turns on and off small lamps 12 for instrument lights and vehicle side lights, and 13 is a relay contact that is turned on and off by relay coils 14 and 15 that constitute a two-wound relay. , 16 is a relay coil of a control relay for switching the rotation direction of the motor 9. Switching contacts 17 and 18 of relay coil 16
are connected to both the left and right terminals of the motor 9, respectively, and are configured to control the protruding and retracting operations of the light shielding hood 6 by switching the direction of the motor current.

Reference numerals 19 and 20 indicate position detection limit switches for detecting the storage position and the light-shielding position of the light-shielding hood 6, and as illustrated in FIG. The protrusions 21 at the rear end of the rack 7 actuate the switch when each limit switch 19, 20 is pressed.
It is configured to be turned off.

22 is an optical sensor such as a CdS cell for detecting the brightness inside the vehicle interior, 23 is a comparator for determining the degree of brightness, and the voltage at point a of the optical sensor 22 is input to the + input terminal. In addition, the voltage at point b, which indicates the reference brightness, is input to the - input terminal, and as the interior of the vehicle becomes dark, the resistance value of the optical sensor 22 increases, and the voltage at point a becomes lower than the voltage at point b. becomes high, the output of comparator 23 becomes “1”
The relay coil 15 is operated via the transistor 24. This circuit consisting of the light sensor 22 and the comparator 23 automatically protrudes the light-shielding hood 6 when the small lamp is not turned on even though the surroundings have become dark, and also causes the small lamp switch 11 to be turned on by some means in the dark. This circuit is added to prevent the light-shielding hood 6 from repeating its protruding and retracting operations each time it is turned on or off for some reason.

22 is a buzzer for danger prevention to notify that the light shielding hood 6 is protruding, 26 is a power source such as a battery, and 27 is a fuse.

In the above configuration, small lamp 1 for daytime etc.
2, the small lamp switch 11 is OFF, the output of the comparator 23 is "0", and the relay coils 14 and 15 are turned off.
is not excited. Therefore, the light shielding hood 6 is
It is held in the storage position shown in the figure.

Now, when the ignition switch 10 is turned on, that is, when the car is in use, the small lamps 12 of instrument lights and vehicle side lights are turned on at dusk such as dusk.
Small lamp switch 11 to turn on the
When turned on, current flows through the relay coil 14,
The relay contact 13 turns ON. Relay contact 13
When turned ON, a current flows through the relay coil 16, and its switching contacts 17 and 18 are switched from the solid line position to the dotted line position in FIG. As a result, current flows through the motor 9 through the power supply 26, the fuse 27, the limit switch 19, the switching contact 17, the motor 9, and the switching contact 18, and the light shielding hood 6
By the action of the rack and pinions 7 and 8 shown in FIG. 4, it is pushed out from the storage position shown in FIG. 2 toward the light shielding position shown in FIG. It should be noted that during this protruding operation of the light-shielding hood 6, the buzzer 25 for danger prevention continues to sound, notifying the occupant that the light-shielding hood is about to protrude.

When the light-shielding hood 6 is extended to a predetermined light-shielding position, the limit switch 19 is turned OFF as shown in FIG. 4, and the rotation of the motor 9 is automatically stopped.

As a result, the light-shielding hood 6 protrudes like a canopy from inside the display hood 3, as shown in FIG. 3, and prevents various display lights emitted from the display screen 5 from being emitted outside the display screen as much as possible. Block out light. For this reason,
The light from the brightly shining display screen 5 is hardly reflected on the window glass of the car, and the driver is no longer dazzled by the light from the display screen, which improves safety when driving at night. It is something that improves the quality of life.

Note that when the surroundings of the car become completely dark and the potential at point a of the optical sensor 22 becomes higher than the potential at point b, and the output of the comparator 23 becomes "1", the other relay coil of the two-turn relay 15 is energized and keeps the relay contact 13 in the ON state. For this reason, even though the surroundings are dark, the small lamp switch 11 is turned on and off due to some reason.
Even if the light-shielding hood 6 is maintained in the protruding state shown in FIG. 3, the small lamp switch 11 is turned on and off.
This prevents the shading hood 6 from protruding or retracting every time it is turned off, which is an eyesore.

Next, with the light shielding hood 6 protruding as shown in FIG. 3, the ignition switch 10 is turned on.
When the relay coil 16 is turned off, the current in the relay coil 16 is cut off, and the switching contacts 17 and 18 are switched from the dotted line position to the solid line position in FIG. Further, as described above, when the light shielding hood 6 is protruded, the limit switch 19 is OFF and the limit switch 20 is ON. Therefore, the motor 9 includes a power source 26, a fuse 27, a limit switch 20, and a switching contact 1.
8. A current flows through the motor 9 and the switching contact 17 in the direction opposite to that during the ejection operation, and the motor 9 is automatically reversed. As a result, the light shielding hood 6
The extended state shown in the figure is automatically returned to the stored state shown in FIG. 2, and the limit switch 20 is automatically stopped at the OFF position by being pushed by the protrusion 21, thereby completing the storing operation.

Since the present invention has the structure and operation as explained above, when the surroundings are dark and the small lamps of the car are turned on, the CRT, LED,
The area around the display screen of a display device using FLT etc. is automatically covered with a light-shielding hood 6, and the display light emitted from the display screen into the vehicle interior can be blocked, and the light from the bright display screen can be seen on the windows of the car. This is effective in preventing the driver from being dazzled by reflections on the glass or window glass, thereby improving driving safety at night.

[Brief explanation of the drawing]

FIG. 1 is a schematic external view of an automobile display device equipped with a light shielding device according to the present invention, and FIG.
FIG. 3 is a schematic cross-sectional view of the light-shielding hood part in the figure, FIG. 3 is a schematic cross-sectional view of the light-shielding hood part in the protruding state, FIG. FIG. 5 is an electric circuit diagram for controlling the extension and retraction of the light shielding hood. 1...Automotive display device, 2...Instrument panel, 3...Display hood, 4...CRT, 5...Display screen, 6
... Light shielding hood, 7, 8 ... Rack and pinion, 9 ... Motor, 11 ... Small lamp switch, 12 ... Small lamp, 13 ... Relay contact, 14, 15 ... Relay coil, 16 ... Relay coil, 17, 18...Switching contact, 19,
20...Limit switch.

Claims (1)

[Scope of utility model registration request] In an automobile display device that is placed in a vehicle interior and optically displays various vehicle information, a retractable light-shielding hood that can be positioned around the display screen of the display device and protrude like a canopy is provided, and A light-shielding display device for an automobile, characterized in that it is equipped with a hood protrusion control mechanism that detects when a small lamp of the automobile is turned on and automatically protrudes the light-shielding hood from a storage position to a light-shielding position. Device.