JP2591800Y2 - Head-up display - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field In the present invention, a combiner is provided in the forward field of view of the operator, and the operator uses the outside scenery and the information projection device. The present invention relates to a head-up display in which projected information display light can be visually recognized in an overlapping state, and more particularly to a head-up display suitable for use on land vehicles.

The head-up display is used when a driver of a vehicle such as an airplane or a car operates while looking at the scenery of the outside world in front, and when superimposing various information on the scenery in front of the driver, etc. used. The use of such a head-up display eliminates the need for the driver to look away at the instruments from the outside world one by one, thereby preventing an accident that may occur while the driver is looking away from the outside world.

(2) Conventional technology The conventional head-up display generally includes a combiner such as a half mirror arranged in front of a driver's field of view.
The combiner is configured to transmit light rays emitted from the external scenery in the direction of the pilot and to diffract information display light incident on the combiner from the cockpit side in the direction of the pilot. An information projection device for causing the information display light to enter the combiner includes an optical information display unit such as a CRT, a plasma display, or a light emitting diode display, and an optical system for causing light emitted from the optical information display unit to enter the combiner. System. The optical system generally includes a relay lens system, a reflecting mirror, and the like, and is configured so that the information display light can be visually recognized by a pilot in a front view.

(3) Problems to be Solved by the Invention In the above-mentioned conventional head-up display, it is clear which display item is displayed at which position in the optical information visually recognized by the operator in the front view. There was no standard. Therefore, various information is displayed at an appropriate position in the visual field of the pilot. However, in land vehicles, the visual field of the pilot narrows to a narrow range as the vehicle speeds up, so that the display information for displaying a large amount of information in the narrow visual field becomes small, making it difficult to visually recognize. In addition, when a large amount of information is displayed in a wide field of view, there is a problem that when the speed of a land vehicle increases, the display information at a position distant from the center of the field of view cannot be easily visually recognized.

An object of the present invention is to make it possible for a pilot to easily recognize necessary information at a low speed and a high speed of a land vehicle.

B. Configuration of the Invention (1) Means for Solving the Problems In order to solve the above problems, the head-up display of the present invention uses optical information display means and information display light emitted from the optical information display means. An information light projecting device having an optical member for projecting light in a predetermined direction, and an information light projecting device, which is provided inclined to the front of the pilot, and forwards a light beam from the outside so that the pilot can visually recognize a scene of the front outside. And a combiner that transmits the information display light emitted from the information light projecting device in a direction in which a pilot can visually recognize the information display light, and a head-up display for a land vehicle, comprising: The speed information during traveling and the information necessary for the operation at the time of stopping are displayed at a position distant from the center of visual recognition in the combiner, and the speed information during high-speed traveling is displayed at the center of the visual field in the combiner. And the display position of each piece of information is fixed in the combiner.

(2) Operation In the head-up display of the present invention having the above-described configuration, while the land vehicle is stopped or traveling at low speed, the driver can visually recognize a wide field of view in a posture facing the front. The information displayed at a position distant from the center of the image can be visually recognized. Further, while the land vehicle is traveling at high speed, the operator can visually recognize information displayed at the center of the field of view (that is, information necessary for traveling at high speed). Further, since the display position of the information is fixed, necessary information can always be confirmed at the same position.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a driver's cab 2 is installed at the front end of a train 1. A windshield 5 as a combiner is disposed in front of the operator's cab 2 between a lower body 3 of the train 1 and a ceiling 4 of the train 1. The windshield 5 is arranged so as to be inclined downward as going forward. In the cab 2, an instrument panel 7 is provided in front of a seat 6 for the driver M.

At the front end of the ceiling 4 of the cab 2, flat optical information display means 10 such as a light emitting diode display panel or a plasma display is installed with its display surface facing downward. The optical information display means 10 is configured to display information on the vehicle speed, the brake air pressure, various warning lights, and the like.

A flat mirror 11 as an optical member is provided on the front upper surface of the instrument panel 7. The flat mirror 11 reflects information display light emitted from the optical information display means 10 toward the windshield 5. It is arranged to let. The optical information display means 10 and the plane mirror 11 constitute an information projection device 12.

The windshield 5 is arranged so as to transmit a part of the information display light incident from the plane mirror 11 and reflect the remainder toward the pilot M, and a part of the light emitted from the external scenery. And the remaining portion is transmitted to the pilot M. That is, the windshield 5 has a combiner function.

A head-up display H is constituted by the information light projecting device 12 and the windshield 5 as a combiner.

Next, the operation of the embodiment according to the present invention having the above-described configuration will be described.

A part of the light beam X traveling toward the windshield 5 from the outside on the left side in FIG. 1 is reflected by the windshield 5 and the rest passes straight through the windshield 5 and is steered. Reaches the eye of the person M. Thereby, the pilot M can visually recognize the scenery of the outside world as it is. On the other hand, the information display light D emitted from the optical information display means 10 of the information projector 12 is reflected by the plane mirror 11 and enters the windshield 5. Then, the information display light D incident on the windshield 5
Is transmitted through the windshield 5 and emitted to the outside world, but the rest is reflected and reaches the eyes of the pilot M. Thus, the pilot M can visually recognize the information display light D.

In the case of the train 1, since the distance between the operator M and the windshield 5 and the distance between the ceiling 4 and the instrument panel 7 are relatively long, the control is performed from the optical information display means 10 installed on the ceiling 4. The optical path length of the information display light reaching the eyes of the person M can be made about 3 m or more. Therefore, the pilot M can visually recognize the information display light about 3 m ahead while watching the scenery of the outside world. This 3m distance is a practical range for land vehicles.

FIG. 2 is an explanatory diagram of a relationship between an example of display information and a visibility range of the pilot M.

In FIG. 2, the view range S1 when the vehicle is stopped or running at low speed is shown.
Is wide, and the visibility range S2 when driving at high speed is narrow.

Information indicating whether the door of the train 1 is closed or open is displayed as “door closed” or “door open” at a position away from the center of the field of view when the vehicle is stopped or running at low speed.
The brake air pressure is displayed as “○ kg / cm ² ” at a position away from the center. These pieces of information are mainly information visually recognized by the pilot M during the stop just before the train 1 departs, and are displayed at a position apart from the center of the visual field range.

In addition, the speed information of the train 1 is displayed by a numerical sequence N in km and a pointer P indicating an hourly speed arranged along a scaled straight line L, and the numerical value of the numerical sequence N at a low speed is represented by the range of the visual field range. The value is displayed at a position away from the center, and the numerical value at the time of high speed is displayed in a range closer to the center, that is, within a visual field range at the time of high speed traveling. And, since each of the information is always displayed at the same position (that is, the display position is fixed),
Necessary information can always be confirmed at the same position.

Therefore, the pilot M can easily visually recognize the information required during stoppage of the train 1 or traveling at low speed, such as “door closed” or the speed at the time of traveling at low speed, in the visual field range. Moreover, at the time of high-speed running, the required hourly speed at the time of high-speed running can be easily visually recognized.

FIG. 3 is an explanatory diagram of another example of the method of displaying the speed information of FIG.

In FIG. 3, the speed information of the train 1 is displayed by a numerical sequence N ′ in km and representing hands per hour arranged along a scaled curve L ′ and a pointer P ′. The point that the numerical value at the low speed of the numerical value sequence N ′ is displayed at a position away from the center of the visual field range, and the numerical value at the high speed is displayed in the range closer to the center, that is, within the visual field range at the time of high-speed driving, This is the same as the example shown in FIG.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims for utility model registration. It is possible to do.

For example, instead of using the windshield of the train itself as a combiner, a half mirror can be separately attached to the inner surface of the windshield. It is also possible to use a concave mirror instead of a plane mirror as an optical member used for a train. The present invention can also be applied to land vehicles other than trains, for example, head-up displays of automobiles and the like.

In addition, it is also possible to display various kinds of information such as the rotation of the engine, and various display modes can be adopted.

C. Effects of the Invention The head-up display of the present invention displays information required when the land vehicle is stopped or running at low speed away from the center of the field of view, and displays information required during high-speed driving at the center of the field of view. Is displayed. Therefore, when the land vehicle is stopped or traveling at low speed, the operator can visually recognize a wide field of view in a posture facing the front, so that the information displayed at a position distant from the center of the field of view (that is, stopped or low speed). Necessary information during traveling) can be visually recognized. Further, while the land vehicle is traveling at high speed, the operator can visually recognize information displayed at the center of the field of view (that is, information necessary for traveling at high speed). That is, the present invention
When the land vehicle is at a low speed or at a high speed, the operator can easily visually recognize the necessary information.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of the head-up display of the present invention, FIG. 2 is an explanatory view of a relationship between an example of display information and a visual field range of the pilot M, and FIG. 3 is display information in FIG. It is explanatory drawing of another example of. D: information display light, H: head-up display, M:
Pilot, 4 ... ceiling, 5 ... combiner, 10 ... optical information display means, 11 ... optical member, 12 ... information projection device,

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60K 35/00

Claims (1)

(57) [Scope of request for utility model registration] 1. An information projection apparatus comprising: an optical information display means; and an optical member for projecting information display light emitted from the optical information display means in a predetermined direction; The light from the outside is transmitted from the front to the back so that the driver can visually recognize the scene of the outside in the front, and the information display light emitted from the information light projector can be visually recognized by the driver. A combiner that diffracts in a direction, and a head-up display for a land vehicle, the speed information of the land vehicle during low-speed traveling and the information necessary for operation when stopping are separated from the center of the field of view in the combiner. A head-up display in which the speed information during high-speed running is displayed at the center of the field of view in the combiner, and the display position of each information is fixed in the combiner.