FR3087986A1 - DISPLAY DEVICE WITH AUTOSTEREOSCOPIC IMAGE OVERLAY ON A REAL IMAGE - Google Patents

Abstract

The present invention relates to a display device for a vehicle, in particular a motor vehicle, comprising a first screen (3) positioned in a rear plane of said device, said first screen (3) displaying a first real two-dimensional image, an electronic module for generating an autostereoscopic image, said electronic module producing a second three-dimensional autostereoscopic image, a second screen (6) displaying said second image, said second screen (6) being perpendicular to said first screen (3), the device further comprising a semi-transparent blade (7) inclined with respect to the first (3) and the second (6) screens, so as to form an acute angle with each of the said first (3) and second (6) screens, said semi-transparent plate (7) being configured to reflect said second autostereoscopic image so as to form a three-dimensional virtual image (13) superimposed on the actual image.

Description

Description Title of the invention: Display device with autostereoscopic image superposition on a real image TECHNICAL FIELD AND SUBJECT OF THE INVENTION

[0001] The present invention relates, in general, to analogue and digital display devices displaying (information concerning the state and operation of the vehicle, in particular mounted in motor vehicles.

The invention relates more particularly to a device for displaying an image on a panel screen (the edge of a vehicle, the image display elements being arranged in two superimposed planes.

Prior art

[0003] In known manner, there are display devices for vehicles comprising information displayed in an analog or digital manner by means of display elements arranged in two planes, giving the devices a three-dimensional appearance.

[0004] Document WO2015130996 discloses a visual display unit system creating a three-dimensional volumetric space inside a vehicle.

This system comprises two screens, one displaying an image in a first focal plane, the second displaying another image in another focal plane, the two screens partially overlapping.

The two screens operate on the same principle using similar technologies ranging from two to three dimensions.

100051 However, such a solution has drawbacks due to the use of screens with similar technologies, because the proposed image has defects which are detrimental to the quality of the image and which can also cause accommodation disorders. in some people, causing discomfort during viewing.

100061 The invention therefore aims to resolve these drawbacks by proposing a device for displaying an image on a screen of the dashboard of a vehicle, consisting of the superposition of an autostereoscopic three-dimensional image by a multi-plane two-dimensional image, in order to avoid inconvenience or image quality defects for the user.

GENERAL PRESENTATION OF THE INVENTION

To achieve this result, the present invention relates to a display device for a vehicle, in particular a motor vehicle, comprising a first screen positioned in a rear plane of said device, said first screen displaying a first real two-dimensional image , an electronic module for generating an autostereoscopic image, said electronic module producing a second three-dimensional autostereoscopic image, a second screen displaying said second image, said second screen being perpendicular to said first screen, the device further comprising a semi-plate. -transparente inclined relative to the first and second screens, so as to form an acute angle with each of said first and second screens, said semi-transparent plate being configured to reflect said second autostereoscopic image so as to form a three-dimensional virtual image superimposed on the actual picture.

[0008] Advantageously, the virtual image is located in a vertical plane in front of the real image, at a distance equivalent to the distance between the second screen and the scmi-transparent plate.

[0009] Advantageously, the semi-transparent blade comprises a reflective coating.

Advantageously, the reflecting coating of the semi-transparent plate has a reflection rate of between 30% and 50%.

Advantageously, the electronic module for generating an autostereoscopic image comprises two optical sensors and the distance between the two optical sensors corresponds to the distance between the pupils of an adult.

[0012] Advantageously, the device comprises a film comprising a lens array, said film covering the second screen, and said lenticular array comprising convex, cylindrical lenses.

Advantageously, each lens of said lenticular array is configured to direct the emissive light flux of a pixel towards the right eye or towards the left eye of a user.

Advantageously, the lenticular array is configured to emit a different image of the same scene respectively to each eye of a user.

[0015] According to one embodiment, the film covering the second screen comprises at least one parallax barrier.

The invention also relates to a motor vehicle comprising a display device as briefly described above.

Brief description of the drawings

Other characteristics and advantages of the invention will become apparent on reading the detailed description of the embodiments of the invention, given by way of example only, and with reference to the drawings which show:

[0018] FIG. 1 represents a diagram of a digital handset having an architecture where a two-dimensional virtual image is superimposed on a real two-dimensional image.

FIG. 2 represents a diagram of a digital handset having an architecture where a three-dimensional virtual image is superimposed on a real two-dimensional image, with the addition of a lenticular array on the top screen according to the invention.

FIG. 3 represents a diagram of the autostereoscopic technology and of the lenticular array as used in the invention.

FIG. 4 represents a diagram of the optical device according to the invention mounted in a motor vehicle.

DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION

[0020] In what follows, the embodiments described relate more particularly to an implementation of the optical device according to the invention within a motor vehicle.

However, any implementation in a different context, in particular in any type of vehicle, is also targeted by the present invention.

Figure 1 shows a multi-plane two-dimensional digital handset.

In this type of multi-plane two-dimensional digital handset, a virtual image is added in front of a real main image to highlight information.

A real image is an image formed when the rays of light are directed at a fixed point, the real image can be projected or seen on a screen, while a virtual image is the opposite of a real image, the rays of light which form it never converging and the virtual image can never be projected on a screen.

The multi-plane two-dimensional digital handset shown in FIG. 1 comprises two image generation electronic modules, a first plane vertical image generation electronic module 1 produces a first so-called real two-dimensional image 2 displayed on a first screen 3, and a second electronic plane horizontal image generation module 4 produces a second two-dimensional image 5 displayed on a second screen 6.

Image 5 is reflected in a semi-transparent slide 7 having a reflective coating producing a so-called virtual two-dimensional image 8.

The virtual image 8 obtained is placed in front of the real image 2, then producing a two-and-a-half-dimensional effect, that is to say two superimposed two-dimensional images, for the user.

FIG. 2 represents the same multi-plane two-dimensional digital handset as in FIG. 1, of which the second electronic horizontal image generation module 4 is of the autostereoscopic type.

Autostereoscopy is a process allowing relief vision, that is to say three-dimensional, without any device.

A lenticular array 9 comprising a multitude of lenses 10 is added to the second screen 6 from above.

Each lens 10 directs the emissive luminous flux of a pixel 11 towards the right eye or towards the left eye, a different image, although very close, is thus sent to the two eyes of the driver.

As in figure 1, a three-dimensional virtual image 13 is reflected on a semi-transparent plate 7 having a reflective coating which is then superimposed on the first real two-dimensional image 2.

The three-dimensional virtual image 13 obtained is partial in order to limit the perception of loss of fineness of the pixels linked to the lenticular array 9.

Thanks to the lenticular array 9, the quality of the final image obtained by the superposition of the three-dimensional virtual image 13 on the real image is better, without defects.

FIG. 3 represents the autostereoscopic technology by lenticular array used in the invention.

The autostereoscopic technology consists in sending a different image, although very close, to each eye, of the same scene.

In this case, this same scene is filmed by two cameras separated by a distance corresponding to the average distance between the two pupils of the eyes of an adult.

The brain then reconstructs the three-dimensionality of the object in the image, as it does all the time on a real stage.

An image can be saved from 2 to 64 different viewpoints, then the images are cut and interlaced.

A lenticular array 9 is added on the second screen 6.

The lenticular array 9 consists of convex and cylindrical lenses 10, juxtaposed in front of the cut image bands 12.

Thanks to the lenses 10, the rays of the image are deflected towards the corresponding eye and thus two different images are imprinted on each retina.

The brain then recreates the impression of relief by superimposing the two images.

Figure 4 shows the optical device according to the invention.

The first electronic vertical image generation module 1 produces a first real two-dimensional image 2 displayed on the first screen 3 positioned vertically at the rear of the device.

The second electronic horizontal image generation module 4 of the autostereoscopic type produces a second three-dimensional image 14 displayed on the second screen 6 positioned horizontally on top of the device.

The second screen 6 is covered with a film comprising a lenticular array 9.

The first screen 3 forms a right angle with the second electronic module for generating horizontal images 4 of the autostereoscopic type.

A semitransparent plate 7 having a reflective coating is located on the diagonal passing through the angle formed by the first screen 3 and the second electronic module for generating horizontal image 4 of the autostereoscopic type.

The reflective coating added to the semi-transparent plate 7 ensures sufficient visibility of the image thanks to a reflection rate between 30 and 50%.

The second three-dimensional image 14 is reflected on the semi-transparent plate 7 which produces a three-dimensional virtual image 13.

The three-dimensional virtual image 13 is positioned at a distance equivalent to the distance between the second three-dimensional image 14 and the semi-transparent plate 7, in front of the first real two-dimensional image 2.

The final three-dimensional image obtained is sharp thanks to the use of the lenticular array 9 which eliminates the defects such as blurring on the screen of the second three-dimensional image 14.

[0025] It is also possible to use a parallax barrier in place of the lens network and / or to modulate the size of the screens, to obtain a three-dimensional image superimposed on the two-dimensional image in order to obtain a virtual image. three-dimensional autostereoscopic.

The device according to the invention therefore makes it possible to amplify the three-dimensional effect of the image to be displayed compared to the two-and-a-half-dimensional effect, while limiting the defects such as the blur of the image and the discomfort. that this causes.

The three-dimensional effect is chosen and concentrated on a few elements of information important to driving for the driver such as navigation instructions, alerts such as that of taking back control of the vehicle, navigation or speed direction arrows, in order to reduce the risk of disturbing the driver.

6 [Claim 1] [Claim 2] [Claim 3] [Claim 4] [Claim 5] [Claim 6] [Claim 7]

Claims (1)

Claims [Claim 1] Display device for a vehicle, in particular a motor vehicle, comprising a first screen (3) positioned in a rear plane of said device, said first screen (3) displaying a first real image (2) in two dimensions, an electronic module for generating an autostereoscopic image (4), said electronic module producing a second three-dimensional autostereoscopic image (14), a second screen (6) displaying said second image (14), said second screen (6) being perpendicular to said first screen (3), the device further comprising a semi-transparent blade (7) inclined relative to the first (3) and to the second (6) screens, so as to form an acute angle with each of said first (3) and second ( 6) screens, said semi-transparent plate (7) being configured to reflect said second autostereoscopic image (14) so as to form a three-dimensional virtual image (13) superimposed on the ’Real picture (2). [Claim 2] Display device for a vehicle according to claim 1, characterized in that the virtual image (13) is situated in a vertical plane in front of the real image, at a distance equivalent to the distance between the second screen (6) and the semi-transparent blade (7). [Claim 3] Display device for a vehicle according to one of the preceding claims, characterized in that the semi-transparent strip (7) comprises a reflective coating. [Claim 4] Display device for a vehicle according to claim 3, characterized in that the reflective coating of the semitransparent plate (7) has a reflection rate of between 30% and 50%. [Claim 5] Display device of a vehicle according to one of the preceding claims, characterized in that the electronic module for generating an auto stereo scopic image comprises two optical sensors and in that the distance between the two optical sensors corresponds to the distance between the pupils of an adult. [Claim 6] Vehicle display device according to one of the preceding claims, characterized in that it comprises a film comprising a lenticular network (9), said film covering the second screen (6), and said lenticular network (9) comprising convex, cylindrical lenses (10). [Claim 7] Display device for a vehicle according to claim 6, [Claim 8] [Claim 9] [Claim 10] characterized in that each lens (10) of said lenticular network (9) is configured to direct the emitting light flux of a pixel towards the right eye or towards the left eye of a user. Display device for a vehicle according to claim 6 or 7, characterized in that the lenticular network (9) is configured to emit a different image of the same scene respectively for each eye of a user. Vehicle display device according to one of claims 6 to 8, characterized in that the film covering the second screen (6) comprises at least one parallax barrier. Motor vehicle comprising a display device according to one of the preceding claims.