JPH0281731A - heads up display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a head-up display (VLM), in particular in a vehicle, etc., in which display information such as driving information is displayed in front of the windshield and the display position is changed in accordance with the vehicle speed. The present invention relates to a head-up display device for displaying images.

(Conventional technology) Conventionally more Fj) 1m reflective surface and volume type phase diffraction grating.

A display device that uses an optically transparent light beam coupling element such as a hologram optical element to spatially superimpose display information on image information such as natural scenery in the outside world within the same field of view, It is generally called a head-up display device and is widely used in various fields.

For example, various designs have been proposed for application to various vehicles, including aircraft cockpits.

Generally, in this type of head-up display device, the display information from the display element is H'S! An important issue is where to display the image within the user's field of view.

For example, in a vehicle, when driving at high speed, the driver's line of sight is located near the center of the windshield, and when driving at low speed or in traffic congestion, the driver's line of sight is located downward.

In addition to the problem of the observer's line of sight as described above, there is also the problem of display position caused by changes in the width of the field of view.

In other words, the driver's field of vision generally becomes narrower at high speeds,
On the other hand, the field of view tends to be wider at low speeds.

Therefore, if the display position is set to be convenient at low speeds, it may go out of view or block the foreground at high speeds, and if the display position is set based on high speeds, it may overlap with the foreground at low speeds. On the other hand, it is legally prohibited to obstruct the driver's field of vision to a certain extent.

Further, since the appropriate position for errands varies depending on the driver's physique, driving posture, driving habits, etc., it is generally very difficult to determine the display position.

(Problems to be Solved by the Invention) The present invention superimposes both image information, such as natural scenery, and display information from a display element provided in the vehicle in a vehicle, etc. via a light beam coupling element. By changing the display position and imaging position of the display information from one display element in accordance with the speed of the vehicle when observing the information of the two within the same field of view, it is possible to always observe both information in good condition. Our goal is to provide a head-up display device that is especially suitable for vehicles and the like.

(Means for Solving the Problems) Speed detection means for detecting the speed of a movable object in which a target object is stored when the target object is stored in a predetermined space of the movable object, and the position of the target object. and a calculation means for performing a predetermined calculation using the output signal from the speed detection means, and a display element provided within the movable object is driven to determine the display position of the display element based on the output signal from the calculation means. and a display means configured to change and display the display facing the target object.

(Example) Figure 1 shows how the present invention can be applied to vehicles, etc. FIG. 2 is a schematic diagram of an embodiment when applied to an II object.

In the figure, 305 is a display element, which is made up of a liquid crystal panel, CRT, or the like.

1) is a filter, and 202 is a beam coupling element provided in a part of the windshield. In this embodiment, the beam coupling element 202 is composed of a hologram, for example, and a lens with a predetermined focal length. It has an effect.

201 is a driver as a target object, 305a is a display element 3
This is a virtual image observed through the beam coupling element 202 of No. 05, and is shown in a reduced size for the sake of illustration.

Reference numeral 304 denotes a driving means that drives the display element 305 and displaces the position observed by the driver 201 via the light beam coupling element 202 based on a signal from the operator stage 301, which will be described later. The means 304 constitutes a part of the display means. 300 is a measuring means,
It is installed on the ceiling 203 or the like of the vehicle, and measures the position of the head of the driver 201 as a target object. Measuring means 30
0 is, for example, an ultrasonic meter Ill1I or an optical position measuring device.

Reference numeral 30B denotes a height detecting means, which measures the height of the vehicle from the road surface, and has a configuration similar to that of the measuring means 300, for example.

Reference numeral 303 denotes speed detecting means 1, which determines the speed of the vehicle from the rotational speed of the tires 302, for example.

301 is a calculating means and measuring means 300. Based on the output signals from the height detecting means 306 and the speed detecting means 303, a calculation method is used to determine which position in front of the windshield (light beam coupling element 202) is best for displaying the image by the display element 305. A @ signal is sent to the request 1wA command means 304. The driving means 304 is the calculation means 3
The display element 305 is driven based on the drive signal from 01. This allows the virtual image of the display element 305 to be observed at a predetermined position in front of the windshield.

For example, when the vehicle is moving at low speed, the display element 305 is displayed at a short distance below the gravity of the vehicle.

Conversely, at high speeds, each element is set to be displayed in a far position close to the front horizontal direction.

Incidentally, the height detection means 306 does not need to be provided in particular when the driver 20
It is sufficient if the eye height of 1 can be found, and the person similar to M can input it manually, for example, by displaying an index in front and matching it with the eye height.

Next, we will show how to calculate the display position of the display element 305 in this example. Let ω (rad/second) be the angular velocity of the movement of the outside scene.

! As shown in figure s1, if the angle between the line of sight and the horizontal line is 0, and the horizontal distance from the observation point on the road surface to A1 point A is vertical, then θ -are tan (h/Emperor)...
・・・・・・(1) When the vehicle speed is now ν (m/sec), the observed position (O+ω) of point A one second later is 1) (1) −mrctanl h /(1 -y
))...(2), where ν(!, then the command ω of the external scene observed within the field of view is ω bite□ 5ino fist cost) fist...
...■Work++(ko)mata, from equations (1) and (3)! When we eliminate ω −−
2-1 sin”θ・・・・・・・・・・・・・・・
... (4) From this, by determining the height h of the driver's head and the vehicle speed ν, the angular velocity ω, which is the movement of the external scene within the visual field, can be obtained.

In this embodiment, the calculation means 301 calculates the angular velocity ω at this time.
is determined, and the display position of the display element 305 is determined based on this as described above.

For car P4 etc., it is best to set the appropriate angular velocity ω in the range of 0.3≦ω≦1.2 (rad/5ec) based on various experimental results. The value can be set to, for example, ω=0.6.

It is not good for the display position of the display element to be too far down.
Also, since it is not good to approach the center position of the field of view, in this embodiment, an upper limit value and an upper limit value are set in advance in the calculation means 301.For example, the angle IFe shown in FIG. 141 satisfies lOo≦θ≦30.

The displacement is controlled within the range of .

Figure 2 shows the vehicle speed when ω=0.6.

09km/h, which shows the display position within the field of view.
Below, the display is at 0R30°, and the speed is 70km/h.
Until then, the display position is moved according to a predetermined function. Furthermore, the display position is fixed at speeds of 70 km/h or higher.

FIG. 3 shows the results of calculating the display position for a person with a high sitting height or a person with a low sitting height, according to the calculation results of FIG. 2.

(Effects of the Invention) According to the present invention, the driver can enjoy H! ! By displacing the display position of the display element based on the movement (angular velocity) of the external scene,
It is possible to achieve a head-up display device in which both display information and other image information can always be observed in good condition at an appropriate viewing position depending on the vehicle speed.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram 0w42 of an embodiment of the present invention. Figure 3 is an explanatory diagram showing the relationship between vehicle speed and display position within the field of view.In Figure 6, 300 is a measuring means, 301 is a calculation means, 3
02 is a tire, 303 is a speed detection means, 304 is a drive means, and 305 is a display element. 306 is a height detection means, 201 is a driver, 202 is a light beam coupling element, and 203 is a ceiling of the vehicle.

Claims (1)

[Claims] (1) A speed detection means for detecting the speed of the movable object in which the object is housed when the object is housed in a predetermined space of the movable object; A calculation means that performs a predetermined calculation using an output signal; and a display element provided in the movable object is driven based on the output signal from the calculation means, and the display position of the display element is changed to be displayed on the target object. 1. A head-up display device comprising display means arranged to face each other.