JPH0576855U - Head up display device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a head-up display device, the storage of the combiner is automated according to the vehicle speed. [Structure] An electric motor 8 for driving the combiner 5 to a storage position or a use position, a vehicle speed sensor 21, and a combiner 5 so that the combiner 5 moves to the use position when the vehicle speed exceeds a first set value. Is lower than the first set value
A control device 20 for driving the electric motor is provided so that the combiner 5 moves to the retracted position when the value falls below the set value.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a head-up display device provided in a vehicle or the like.

[0002]

[Prior Art]

 As a conventional head-up display device, for example, as disclosed in Japanese Utility Model Laid-Open No. 2-148838, a combiner for displaying the display light emitted from the projector is provided on the windshield of the vehicle or in the vicinity thereof for visibility. There are things that improve.

By reducing the line-of-sight movement of the driver using this head-up display device, it is possible to enhance the safety during high-speed traveling.

[0004]

[Problems to be solved by the device]

 However, in such a head-up display device, the combiner is provided at a position where the movement of the driver's line of sight is reduced as much as possible. There was a problem that it hindered the view.

The present invention focuses on the above problems and aims to solve them.

[0006]

[Means for Solving the Problems]

 The present invention provides a head-up display device that includes a combiner that displays display light emitted from a projector, and that supports the combiner so that the combiner can be stored. An electric motor that drives the combiner to a storage position or a use position, and a vehicle speed are detected. Means for moving the combiner to the use position when the vehicle speed exceeds the first set value, and when the vehicle speed falls below the second set value which is lower than the first set value. Control means for driving the electric motor so that the combiner moves to the storage position.

[0007]

[Action]

 Based on the above configuration, the combiner automatically deploys to the use position when the vehicle runs at a high speed when the vehicle speed exceeds the first set value. As a result, the driver does not have to move the combiner by his / her own hand, and the combiner is not touched and dirty by hand.

When the vehicle travels at a low speed where the vehicle speed is lower than the second set value, the combiner is automatically retracted, and it is possible to avoid obstructing the visual field.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, a head-up display device 3 is provided on the ceiling wall 2 of the cab 1 so as to be located in front of the driver's seat of the truck.

As also shown in FIG. 3, the head-up display device 3 includes a combiner 5 that displays the display light emitted from the projector 4 via the reflecting mirror 6, and provides the driver 10 with various information such as vehicle speed. It is supposed to inform you.

As shown in FIG. 4, the combiner 5 is rotatably supported via a shaft 7, and the shaft 7 is rotationally driven by an electric motor 8 via gears 11 and 12. As a result, the combiner 5 is switched between a use position in which the combiner 5 hangs downward as shown by a solid line in FIG. 3 and a storage position in which the combiner 5 extends in parallel with the ceiling wall 2 as shown by a broken line.

As shown in FIG. 1, the control device 20 for driving the electric motor 8 includes a vehicle speed sensor 21 for detecting a vehicle speed and a combiner 5 for use when the vehicle speed exceeds a _first set value V ₁ . And a vehicle speed calculator 22 that outputs an UP / DOWN signal so that the combiner 5 moves to the storage position when the vehicle speed drops below the second set value V ₂ . A motor drive circuit 23 that supplies a drive current to the electric motor 8 based on the output is provided. The first set value V ₁ is set higher than the second set value V ₂ by a predetermined value, for example, 10 km / h.

Further, the vehicle speed calculation unit 22 outputs a signal for moving the combiner 5 to the use position when the vehicle speed exceeds the first set value V ₁ , and outputs the vehicle speed signal to the display drive circuit 24 of the projector 4. Is output from the display drive circuit 24 to the light emitting unit 25 of the projector 4.

Based on the above configuration, when the vehicle speed exceeds the first set value V ₁ , the combiner 5 is automatically deployed to the use position so that the combiner 5 is located in front of the windshield 9. As a result, the driver 10 does not have to move the combiner 5 by his / her own hand, and the combiner 5 is not touched and stained by the hand.

When the vehicle is traveling at a low speed lower than the second set value V ₂ , the combiner 5 is automatically stored above the front glass 9 and it is possible to avoid obstructing the visual field.

[0017]

[Effect of the device]

 As described above, the present invention includes a combiner for displaying display light emitted from a projector, and in a head-up display device that supports the combiner so that the combiner can be stored, the combiner is driven to a storage position or a use position. An electric motor, means for detecting the vehicle speed, and a second set value such that the combiner moves to the use position when the vehicle speed exceeds the first set value and the vehicle speed is lower than the first set value. Since the combiner is provided with the control means for driving the electric motor so that the combiner moves to the retracted position when the combiner is lowered further, the combiner is automatically retracted during low-speed traveling, and it is possible to avoid obstructing the visual field. When driving at high speed, the combiner automatically expands to the use position, and the driver does not have to move the combiner with his or her own hands, but touches the combiner by hand. It is not able to or stain.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of a head-up display device showing an embodiment of the present invention.

FIG. 2 is also an overall view of a head-up display device.

FIG. 3 is a sectional view of the head-up display.

FIG. 4 is a perspective view showing a drive system of the combiner.

[Explanation of symbols]

 3 Head-up display device 4 Projector 5 Combiner 8 Electric motor 20 Control device 21 Vehicle speed sensor 22 Vehicle speed calculator 23 Motor drive circuit

Claims (1)

[Scope of utility model registration request] 1. A head-up display device comprising a combiner for displaying display light emitted from a projector and supporting the combiner so that the combiner can be stored, and an electric motor for driving the combiner to a storage position or a use position and a vehicle speed. Means for detecting, and so that the combiner moves to the use position when the vehicle speed exceeds the first set value,
And a control means for driving the electric motor so that the combiner moves to the storage position when the vehicle speed falls below the second set value which is lower than the first set value. apparatus.