FR3022040A1 - SYSTEM FOR 3D REPRESENTING A 2D IMAGE DISPLAYED ON A DISPLAY SCREEN - Google Patents

Abstract

The invention relates to a system for 3D representation of an image displayed in 2D on a display screen (11) of a mobile communication device (10), comprising a transparent screen (21) hinged around the screen display (11) of the communication device and adapted to take at least: - an extended position in which the transparent screen (21) is oriented at an acute angle (α) with respect to said display screen (11) so that a virtual image in 3D (I), corresponding to the image displayed in 2D, appears behind the transparent screen, and - a folded position in which the transparent screen (21) is parallel to the screen display, forming a protection for said display screen. The invention also relates to a protective shell (30) of a communication device comprising this 3D representation system.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a system for 3D representation of a 2D image displayed on a display screen of a mobile communication device such as a mobile phone or a smartphone. The invention also relates to a method for implementing such a system. The invention has applications in the fields of communication and imaging. It allows, in particular, applications in the field of mobile telephony to enable three-dimensional (3D) visualization of a two-dimensional (2D) image displayed on the screen of a mobile telephone device. STATE OF THE ART Mobile communication devices are increasingly present in the lives of individuals and businesses. These mobile communication devices may be mobile phones, smartphones or smart phones, or any other mobile phone device equipped with an operating system for running various software or applications. These mobile communication devices, hereafter called communication devices or telephony devices, generally comprise a display screen for displaying two-dimensional images, called 2D images. Due to their modest size, these mobile communication devices are taken in all the movements of their users, with all the risks of stroke and fall that these movements entail. In the fields of virtual imaging, it is known to generate a 3D virtual image, also called hologram, by means of a process known as Pepper's Ghost. This method 25 allows, by reflection of light, to appear in a closed area, such as a room or a box, a virtual image of characters or objects in 3 dimensions. These characters or objects can appear, disappear and move virtually within the closed area. Such a method is conventionally used in the field of spectacles, and especially magic, with large closed areas associated with mirrors and projectors.

More recently, this method of Pepper's Ghost has been implemented to generate 3D virtual images from images displayed on a mobile phone screen or smartphone. A 3D representation device for implementing this method is described in document EP 2 610 672. This device comprises several rigid elements mounted one inside the other to form a partially closed structure. It comprises in particular: a support structure to be fitted around the smartphone, a roof structure and a bottom structure partially closing the space, and at least two transparent screens positioned parallel to one another between the structure. of support and roof structure. This 3D representation device is removable. However, its assembly before each use and disassembly at the end of use is relatively tedious for the user. In addition, if the user only occasionally uses the device, he must remember, at each use, where the device is stored and how to implement it.

SUMMARY OF THE INVENTION The object of the invention is precisely to overcome the disadvantages of the techniques described above. For this purpose, the invention proposes a system for 3D representation of a 2D image generated on a screen of a mobile communication device, this system being permanently installed on the communication device or on a protective shell of said communication device and ensuring in a deployed position, a 3D virtual representation and, in a folded position, a protection of the display screen of the communication device. An intermediate position of the system allows a conventional use of the communication device.

More specifically, the invention relates to a system for 3D representation of an image displayed in 2D on a display screen of a mobile communication device. This system is characterized by the fact that it comprises a transparent screen hinged around the display screen of the communication device and able to take at least: - an extended position in which the transparent screen is oriented at an acute angle relative to said display screen so that a 3D virtual image, corresponding to the image displayed in 2D, appears behind the transparent screen, and - a folded position in which the transparent screen is parallel to the screen. display screen, forming a protection for said display screen. This system has the advantage of being simple to implement since it is sufficient for the user to unfold the transparent screen to obtain a 3D representation. It also has the advantage, when the system is folded, to protect the display screen of the communication device in case of shocks. The system of the invention may comprise one or more of the following features: the transparent screen is mounted in an articulated frame, said hinged frame being rotatable around the display screen of the communication device. - The transparent screen is a plastic film stretched on a frame forming the hinged frame. - It comprises a support frame at least partially surrounding the communication device, the hinged frame being rotatably mounted at a first end around said support frame. According to this embodiment, the representation system is independent of the communication device; it can be removed from a communication device and reassembled on another communication device, especially when one of the communication devices is faulty. - It comprises a base, located in a plane parallel to a plane of the support frame when said system is in the deployed position, the hinged frame being mounted, by a second end, rotatable about the base so that, in deployed position, the support frame, the hinged frame and the base are Z-shaped and, in the folded position, the support frame, the hinged frame and the base form a protection cap of the display screen . The base forms a base of stability of the system when it is placed. It also forms a virtual floor in the 3D virtual image. - The acute angle between the transparent screen and the display screen of the communication device is close to 45 °. This 45 ° angle allows the visualization of the 3D virtual image by a user facing the transparent screen. - The transparent screen is adapted to take an intermediate position in which said transparent screen forms an angle of at least 90 ° with the display screen, this intermediate position ensuring a conventional use of the communication device. - It comprises at least one rotary connection system mounted between the hinged frame and the support frame and equipped with at least one stop ensuring positioning of the hinged frame at an acute angle a.

The invention also relates to a protective shell for a mobile communication device. This shell is characterized by the fact that it comprises a 3D representation system of a 2D image as described above. This shell has the advantage not only of protecting the communication device, but also of offering a virtual 3D representation of the image displayed on the screen of said communication device. This protective shell may comprise side walls forming a support frame on which is mounted, rotatable, the transparent screen of the 3D representation system. This shell is then like a shutter shell whose shutter has a function of 3D image display. The invention also relates to a mobile communication device comprising a display screen capable of displaying a 2D image and a 3D representation system of the 2D image as described above.

BRIEF DESCRIPTION OF THE DRAWINGS Other advantages and characteristics of the invention will appear on reading the description, illustrated by the following figures: FIGS. 1 and 2 show schematically the system of the invention, mounted on a smartphone, in a deployed position; FIGS. 3A and 3B show two embodiments of the system of FIG. 1 in a folded position; FIG. 4 represents an optical diagram of the reflection principle implemented in the system of the invention; - Figure 5 shows the system of Figure 1 in a conventional intermediate operating position of the mobile phone. DESCRIPTION OF EMBODIMENTS The invention relates to a system for 3D representation of an image displayed in 2D on the display screen of a communication device. The 2D image may be an image from the internet network or any other image that may be displayed on a conventional communication device screen. By a reflection method, known as Peppers'Ghost, the system of the invention makes it possible to represent this 2D image in the form of a 3D virtual image. An example of the system of the invention mounted on a communication device 10 is shown in FIG. 1. More precisely, this FIG. 1 shows the system 20 of the invention while a 2D image is represented in 3D. that is, when the system 20 is in its deployed position. This system 20 comprises a transparent screen 21 (or foil, in English terms), movable relative to the display screen 11 of the communication device 10. This transparent screen 21 is articulated around the display screen 11 so as to be oriented obliquely with respect to said display screen 11, at an acute angle a. This acute angle α is between about 40 ° and 55 °. It may be, for example, about 45 °. The transparent screen 21 is a screen made of a semi-transparent material, that is to say a material which, in a first optical direction D1, is able to reflect at least partially the 2D image and, in a second direction optical D2, is transparent and allows vision through said screen. The material in which the transparent screen 21 is made has a refractive index close to that of the glass, for example a refractive index of 1.5. Examples of optical directions D1 and D2 are shown in FIG. 4. These optical directions vary according to the orientation of the transparent screen 21, that is to say as a function of the measurement of the acute angle a .

Thus, the term "transparent screen" includes any reflective or semi-transparent surface providing both a reflection of light in an optical direction and a light transmission in another optical direction to allow the creation of a next virtual 3D image. the technique of Pepper's Ghost. As explained in FIG. 4, the angular orientation (acute angle a) of the transparent screen 21 ensures reflection, on said transparent screen 21, of at least a portion of the 2D image displayed on the screen. display 11. The vision of the user U through this same transparent screen 21 generates a 3D virtual image corresponding to the 2D image displayed on the display screen 11. This virtual 3D image, referenced I in FIGS. 2 and 4, is an unsupported image that appears at the rear of the transparent screen 21, the rear being the zone opposite to the area where the user U is located. This virtual 3D image appears in the space E delimited by the transparent screen 21. In Figures 1 and 2, the 3D virtual image is schematized by the character I. As shown in Figure 4, the 2D image displayed on the display screen 11 is reflected on the transparent screen 21, at a right angle (reflection schematized by the arrows in pointill s). The eye of the user U sees this image reflected through the transparent screen 21 (in the direction D2 shown schematically by an arrow in phantom). This reflected image then appears perpendicular to the optical direction D2 behind the transparent screen 21.

The transparent screen 21 may be a glass wafer or a rigid plastic wafer, mounted directly on the housing of the communication device 10 or on a protective shell 30 by means of a first rotary connection system 24. The wafer glass or plastic can also be mounted inside an articulated frame 26. In this case, it is the hinged frame 26 which is mounted on the communication device 10 or on the protective shell 30 by means of the system The transparent screen 21 may also be a plastic film, flexible, stretched within a frame, as shown in Figure 2. In this case, the frame is the hinged frame 26. In the following of the description, it will be considered that the transparent screen 21 is mounted in a frame 26 articulated around the display screen 11, it being understood that the transparent screen 21 can also be articulated directly around the display screen 11. In u n embodiment of the invention, shown in Figures 1 and 3, the system of the invention 20 further comprises a support frame 22 on which is mounted the hinged frame 26. This support frame 22 is a frame, metal or plastic, adapted to be installed around the housing of the communication device 10 or fixed on a protective shell 30, as shown in Figure 1. The support frame 22 can also be an integral part of a protective shell 30 of the communication device 10. In this variant, the support frame 22 may be constituted by the side walls of the shell which surround the communication device 10. The hinged frame 26 is then directly mounted on the protective shell 30 via the 24. Whatever the variant (mounting around the communication device or on a shell), the support frame 22 ensures easy assembly and disassembly of the entire system 20. In addition, which whatever the variant, the support frame 22 is positioned in a plane parallel to the plane of the display screen 11. The hinged frame 26, rotatably mounted around the support frame 22 via a rotary connection system 24, is suitable to be positioned to form an acute angle with respect to the support frame 22.

The rotary connection system 24 connecting the hinged frame 26 (equipped with the transparent screen 21) to the support frame 22 may be, for example, a pivot connection, a hinge-type hinge, or any other connection allowing rotation around the hinge frame. 'an axe. This rotary connection system 24 comprises at least one first stop ensuring positioning of the transparent screen 21 at an angle α with respect to the plane of the display screen 11. According to a variant of the invention, the connection system rotary 24 may comprise a locking device adapted to lock the hinged frame in its deployed position. In the embodiment of the invention shown in Figures 1 and 2, the system 20 comprises a base 23. This base 23 is a plate, for example plastic, capable of forming a base for the assembly consisting of the system 20 and the communication device 10, this base providing stability to the entire system 20 and the communication device 10 when it is placed in the hand of the user or on a support such as a piece of furniture.

This base 23 furthermore forms a floor or floor for the virtual image I, as shown in FIG. 2 or FIG. 4. The characters of the virtual image I appear to rest on the ground constituted by the base 23. note, however, that the absence of such a base 23 does not prevent the representation of the virtual image I, this image I is then represented without support, that is to say without bottom or floor.

This base 23 is adapted to receive, at one of its ends, the hinged frame 26, rotatably mounted on said base by means of a second rotary connection system 25. The hinged frame 26 is thus fixed by a its ends, to the support frame 22 and, at its opposite end, to the base 23. Thus, when the system 20 is in its deployed position, as shown in Figures 1 and 2, the support frame 22 and the base 23 are in parallel planes; the hinged frame 26 is positioned obliquely between these parallel planes. The system 20 is then Z-shaped. The second rotary connection system 25 may be identical to the first rotary connection system 24. Like the rotary connection system 24, the rotary connection system 25 may comprise a stop ensuring a following positioning. an angle (3, complementary to the acute angle a, of the hinged frame 26 relative to the base 23. This positioning along the angle (3 ensures the parallelism of the display screen 11 with the base 23. In addition, according to a variant of the invention, the rotary connection system 25 may comprise a locking device adapted to lock the hinged frame in its deployed position.

In Figure 3A, there is shown the system 20 of Figures 1 and 2 when in a folded position. In this folded position, the hinged frame 26 forms a zero angle with the support frame 22. It also forms a zero angle with the base 23. The thus folded system 20 then forms a cap positioned in front of the display screen 11 the communication device 10, protecting said screen 11 from possible bumps or shocks. FIG. 3B shows the system 20 of the invention in the embodiment in which the protective shell 30 integrates the support frame 22. It is understood from the foregoing that the system of the invention has several functions dependent on the position of said system. In an expanded position of the system 20, the user can view a 3D representation of the image displayed on his communication device. The system then has a function of 3D image display. In a folded position, the system 20 acts as a protection cap for the display screen 11. Thus, in the embodiments where the support frame 22 is mounted on a protective shell 30 or is an integral part of a protective shell 30, the representation system 20 constitutes a protective case of the communication device 10 inside which said communication device is inserted as inside a protective shell provided with a cap, the hood also offers 3D representation functionality. Figures 1 to 3 described above show the system of the invention in an extended position and in a folded position. The system 20 of the invention further comprises an intermediate position in which the hinged frame 26 is folded over the base 23 and unfolded from the support frame 22 to allow full access to the communication device 10. In this intermediate position the angle (3, complementary to the angle a, may be a zero angle and the angle to a right angle or a flat angle.) In this embodiment, the rotary connection system 24 connecting the support frame 22 and the hinged frame 26 may comprise a second stop providing a particular positioning, for example at a right angle or a flat angle, of the hinged frame with respect to the support frame.Figure 5 represents an example of the system of the invention in the intermediate position, in the embodiment where the support frame is an integral part of the protective shell 30. As shown in this figure, the hinged frame 26 and the base 23 together form a flap located in the extension of the t mobile phone 10. The positioning of this flap 23/26 allows access to conventional features of the phone.

This intermediate position allows the transparent screen 21 does not interfere with access to the communication device 10, including the display screen 11 when it is a touch screen. In this intermediate position, the user has access to all the conventional functions of his communication device 10.

Thus, in the variant where the support frame is an integral part of the hull 30, the system of the invention constitutes a protective hull shutter whose flap has the particularity to offer, in addition to its protective function, a 3D virtual image viewer function

Claims (11)

CLAIMS1 - System for 3D representation of an image displayed in 2D on a display screen (11) of a mobile communication device (10), characterized in that it comprises a transparent screen (21) adapted to be articulated around the display screen (11) of the communication device and adapted to take at least: - an extended position in which the transparent screen (21) is oriented at an acute angle (a) relative to said screen of display (11) so that a 3D virtual image (I), corresponding to the image displayed in 2D, appears behind the transparent screen, and - a folded position in which the transparent screen (21) is parallel to the display screen, forming a protection for said display screen. 2 - System according to claim 1, characterized in that the transparent screen (21) is mounted in a hinged frame (26), said hinged frame being rotatable around the display screen (11) of the device. communication (10). 3 - System according to claim 2, characterized in that the transparent screen (21) is a plastic film stretched on a frame forming the hinged frame (26). 4 - System according to any one of claims 2 to 3, characterized in that it comprises a support frame (22) adapted to at least partially surround the communication device (10), the hinged frame (26) being mounted mobile in rotation, at a first end, around said support frame. 5 - System according to claim 4, characterized in that it comprises a base (23), located in a plane parallel to a plane of the support frame (22) when said system is in the deployed position, the hinged frame (26) being mounted, by a second end, rotatable about the base (23) so that, in the deployed position, the support frame, the hinged frame and the base have a Z-shaped and, in the folded position, the support frame, the hinged frame and the base form a protective cap of the display screen (11). 6 - System according to any one of claims 1 to 5, characterized in that the acute angle (a) between the transparent screen (21) and the display screen (11) of the communication device is close to 45 °. 7 - System according to any one of claims 1 to 6, characterized in that the transparent screen (21) is adapted to take an intermediate position in which said transparent screen forms an angle of at least 90 ° with the screen display, this intermediate position ensuring a conventional use of the communication device. 8 - System according to any one of claims 4 to 7, characterized in that it comprises at least one rotary connection system (24) mounted between the hinged frame (26) and the support frame (22) and equipped with at least one stop ensuring positioning of the articulated frame at the acute angle (a). 9 - Protective shell (30) for mobile communication device (10), characterized in that it comprises a system (20) for 3D representation of a 2D image according to any one of claims 1 to 8. 10 - protective shell according to claim 9, characterized in that it comprises side walls forming a support frame (22) on which is mounted, rotatable, the transparent screen (21) of the 3D representation system . 11 - Mobile communication device comprising a display screen (11) capable of displaying a 2D image, characterized in that it further comprises a system (20) for 3D representation of the 2D image according to any one of Claims 1 to 8.