EP3577390A1 - Dispositif d'affichage - Google Patents
Dispositif d'affichageInfo
- Publication number
- EP3577390A1 EP3577390A1 EP18701768.6A EP18701768A EP3577390A1 EP 3577390 A1 EP3577390 A1 EP 3577390A1 EP 18701768 A EP18701768 A EP 18701768A EP 3577390 A1 EP3577390 A1 EP 3577390A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- display device
- plate
- light
- backlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
Definitions
- the present invention relates to a display device.
- a display device comprising:
- the invention is particularly applicable in a vehicle such as a motor vehicle.
- a user interface comprising a screen, for example LCD, for displaying information.
- the fact that the displayed information can be viewed not only by the user of the device but also by other individuals located near the screen poses a problem of confidentiality when the displayed information, presenting a private character, is intended only for the user of the device.
- a laptop screen with a privacy filter.
- This privacy filter filters the light emitted by the screen so that it only illuminates, after passing through the filter, an area of space, facing the screen, having a reduced angular width. Only the user of the laptop, whose head is located in front of the screen, can then view the information displayed. On the contrary, an individual whose head is offset laterally with respect to this zone of reduced angular width can not visualize this information.
- a screen at the front of the vehicle interior, for example at a central console of the vehicle, to display information for the driver, such as images captured by side or rear cameras of the vehicle, or navigational information relating to a route followed by the vehicle.
- This screen can also be used to display information intended for the entertainment of passengers of the vehicle, in particular the front passenger of the vehicle. But this information, which does not provide assistance in driving the vehicle, can then be perceived by the driver and are thus likely to distract him from driving the vehicle.
- the present invention provides a display device comprising:
- a screen comprising an input face and an output face, and having, between the input face and the output face, a controllable optical transmission, and
- a first set of backlight arranged opposite the input face of the screen and comprising a first light source, the first set of backlighting being configured to transmit to the screen a first light radiation so as to illuminate, after transmission by the screen, a first lighting field.
- the display device further comprises a second backlight device located between the screen and the first backlighting device, the second backlight device comprising:
- a light guide made by means of an at least partially transparent plate
- a second light source disposed at the periphery of the plate, the light guide being configured so that a second light radiation received from the second light source at least partly leaves said plate in the direction of the screen to illuminate, after passing through the screen, a second lighting field at least partially disjoint from the first lighting field.
- the at least partially transparent plate of the second backlighting system passes, at least in part, the first light radiation emitted by the first backlighting system, so that it can reach the screen to then illuminate the first lighting field.
- the light which out of the screen illuminates only the first field of illumination.
- the display device is configured so that the first CH1; CH1 'and second CH2 lighting fields are at least partially disjoint, the display device 10; 10 'advantageously makes it possible to address the displayed information:
- This display device thus makes it possible to select, from among several users of the device, located at different positions, the one or those for which the displayed information is visible.
- This property is particularly interesting in terms of protecting the confidentiality of the information displayed.
- the display device is installed in a vehicle, such as a motor vehicle, because it allows, depending on whether the information displayed helps the driving of the vehicle, or is on the contrary likely to distract a driver from the vehicle. vehicle, to make this information visible or invisible to the driver.
- the tilting of the first to the second lighting configuration can be realized in a fully electric manner, without mechanical displacement of moving parts, which is interesting in terms of robustness and response time to a tilt control.
- the first set of backlighting is configured to emit the first light radiation with a reduced angular width, less than an angular width presented by the second light radiation at the output of the second set of backlighting;
- the first backlight assembly comprises an optical filter which imposes on the first light radiation said reduced angular width
- the first set of backlight is configured for the first light radiation sort of the first set of backlight with a mean direction of propagation offset angularly with respect to a mean direction of propagation of the second light radiation issuing from said plate;
- the first backlighting assembly comprises an optical component adapted to deflect the first light radiation so that, when leaving the first backlighting assembly, it has said mean propagation direction angularly offset relative to the average direction of the light; propagation of the second light radiation coming out of said plate;
- the second light source comprises at least one electroluminescent diode
- the light guide of the second backlighting assembly comprises a partially reflecting coating applied on one side of said plate located on the side of the first backlighting assembly with respect to the plate;
- said coating is partially diffusing
- the first set of backlighting comprises another light guide made by means of another at least partially transparent plate, disposed opposite the input face of the screen, the first light source being disposed at the periphery of said other plate;
- said other plate is configured so that the first light radiation received from the first light source emerges at least in part from said other plate in the direction of the screen;
- the light guide of the first set of backlight comprises a reflective coating applied to one side of the plate of the first set of backlight which is located on a side opposite the screen relative to this plate;
- the display device comprises a polarization recycling filter disposed between the second backlight assembly and the input face of the screen;
- the display device is configured so that, being installed in the front part of a vehicle interior, in front of a driver's seat and a front passenger seat of the vehicle, the second lighting field includes at least partially the driver's seat, and the first lighting field excludes the driver's seat;
- the display device is configured so that, being installed in the front part of a vehicle cabin, in front of a driver's seat and a front passenger seat of the vehicle, an angular opening of the second lighting field is large enough to at least partially include the driver's seat, and a reduced angular aperture of the first illumination field is small enough to exclude the driver's seat;
- the display device comprises a control unit programmed to control the optical transmission of the screen so as to display data, and to control the ignition selectively of either the first light source or the second source; of light, according to said data to be displayed.
- FIG. 1 schematically represents, in section, a display device according to a first embodiment implementing the teachings of the invention
- FIG. 2 diagrammatically, seen from above, a first vehicle in which the display device of FIG. 1 is installed
- FIG. 3 schematically represents, in section, a display device according to a second embodiment implementing the teachings of the invention
- FIG. 4 schematically represents a second vehicle in which the display device of FIG. 3 is installed, a first field illuminated by this display device being also represented,
- FIG. 5 diagrammatically represents the vehicle of FIG. 4, and a second field illuminated by the display device which equips it.
- Figures 1 and 3 show schematically the main elements of a display device 10; 10 'according to a first, and respectively a second embodiment according to the teachings of the invention.
- the display device 10 comprises a screen 13 (FIGS. 1 and 3) comprising an input face 13E and an output face 13S (FIGS. 1 to 5), and presenting, between the input face 13E and the face of 13S output, a controllable optical transmission.
- the screen 13 comprises several distinct elements (not shown), each of which has a controllable optical transmission.
- An image, containing information to be displayed, can thus be formed by transmission of light radiation through the screen 13, the pixels of this image then corresponding to said distinct elements of the screen.
- the screen 13 may be produced by means of a liquid crystal screen, for example of the TFT ("Thin-Film Transistors”) type, or thin-film transistors.
- TFT Thin-Film Transistors
- thin-film transistors thin-film transistors
- the input 13E and output 13S faces of the screen 13 are here substantially parallel to each other.
- the display device 10; 10 ' also comprises a first set of backlight 1 1; 1 1 '( Figures 1 and 3), arranged vis-à-vis the input face 13E of the screen.
- the first set of backlight 1 1; 11 ' comprises a first light source 11 1, and is configured to transmit to the screen 13 a first light radiation so as to illuminate, after transmission by the screen, a first illumination field CH1; CH1 '( Figures 2 and 4).
- a first light guide made by means of a first plate
- the first light source 1 1 1 disposed at the periphery of the first plate 121.
- Per periphery of the plate is meant here an area located near the edge of the plate, and sufficiently far from the center of the plate not to be located right of the screen 13.
- the first plate 121 is configured so that the first light radiation, initially emitted by the first light source 11 1, then enters through the first plate 121 to exit, at least in part, in the direction of the screen 13.
- This first plate 121 is for example made of transparent plastic material such as PMMA or polycarbonate. It extends substantially parallel to the entrance face of the screen.
- This first plate has two main faces, one of which is approximately parallel to the input face 13E of the screen, connected by a wafer. These two main faces are slightly inclined towards each other (they are not completely parallel to each other), forming between them an angle of, for example, between 0.5 and 5 degrees.
- the light guide of the first set of backlight 1 1; 1 1 ' also comprises a reflective coating 131 applied on the main face of this first plate 121 which is located, relative to the plate 121, opposite the screen 13.
- the first light source 1 1 1 is disposed opposite the edge of the first plate 121, the side where the plate has the largest thickness ( Figures 1 and 3).
- the first light source 11 may notably be produced by means of one or more sources of elementary lights, such as electroluminescent diodes arranged, as explained above, opposite the edge of the first plate 121.
- this or these elementary light sources are arranged in a plane not perpendicular to the screen to be illuminated.
- a reflector system may be provided to collect the first light radiation, initially emitted by this or these elementary light sources, and to direct it to the first plate.
- the first light radiation emitted by the first light source 1 1 1, enters here into the first plate 121 at its edge.
- the slight inclination, with respect to one another, of the two main faces of the first plate 121 then makes it possible both to guide the first light radiation inside the latter, and to bring it out gradually, as its propagation in the plate 121, by the main face located on the side of the screen 13.
- the reflective coating 131 applied to the other main face of the plate prevents an output of the first light radiation at the level of this face, and thus improves the efficiency with which the first light guide redirects to the screen 13, the light radiation emitted initially by the first light source 1 1 1.
- the first light guide described above could be omitted, the first light source then being arranged to directly emit the first radiation in the direction of the screen.
- the first light source could for example be made by means of one or more light-emitting diodes or of one or more fluorescent tubes, arranged one (or the other) next to the others in a plane substantially parallel to the input face of the screen, vis-à-vis this input face.
- a reflector system may be provided to collect the first light radiation emitted by the first source, and to direct it to the screen.
- the display device 10; 10 ' comprises a second set of backlight 12, located between the screen 13 and the first backlight device 11; 1 1 ', the second set of backlight 12 comprising:
- a second light guide made by means of a second at least partially transparent plate 122
- a second light source 1 12 disposed at the periphery of the second plate 122.
- the second light guide is configured so that a second light radiation, received from the second light source 1 12, at least partially out of the second plate 122 towards the screen 13 (arrow F2 of Figures 1 and 3) for illuminating, after crossing the screen, a second illumination field CH2 at least partially disjoint from the first illumination field CH1; CH1 '( Figures 2, 4 and 5).
- the second lighting field CH2 corresponds (as for the first lighting field) to the region of the space reached by the second light radiation coming out of the screen 13, or, at least, to a part of this region. wherein the light intensity of the second radiation is sufficient for it to be perceived by a user.
- the second plate 122 is at least partially transparent, at least a portion of the first light radiation from the first backlight system 1 1; 1 1 ', can cross the second set of backlight 12 to reach the screen 13 and then illuminate the first lighting field CH1; CH1 ', as shown schematically by the arrow F1 of Figures 1 and 3.
- the positioning of the second light source 12 at the periphery of the second plate 122 also makes it possible to prevent this source from masking part of the first light radiation.
- the display device is configured so that the first CH1; CH1 'and second CH2 lighting fields are at least partially disjoint, the display device 10; 10 'advantageously makes it possible to address the displayed information:
- the display device 10; 10 'thus advantageously makes it possible to select, from among several users of the device located at different positions, the one or those for which the displayed information is visible.
- the assembly comprising the second plate 122 and the second light source 1 12 is here identical, or at least similar, to the assembly comprising the first plate 121 and the first light source 1 1 1 which have been described in detail above.
- the second plate 122 extends substantially parallel to the input face 13E of the screen, and has two main faces, one of which is approximately parallel to this input face 13E, connected by a wafer. These two main faces are slightly inclined towards one another, forming between them an angle of, for example, between 0.5 and 5 degrees.
- the second light source 1 made for example by means of one or more light-emitting diodes, is arranged opposite the edge of the second plate 122, on the side where this plate presents the the greatest thickness.
- a partially reflective coating 132 is applied to the main face of the second plate 122 which is located, with respect to this plate 122, on the side of the first set of backlight 11; 1 1 '.
- This coating 132 is partially transparent.
- the coating 132 applied to the second plate 122 is therefore not completely reflective.
- the partially reflective coating 132 applied to the plate 122 of the second backlight assembly 12 is further partially diffusing, thereby improving the illumination homogeneity of the screen 13.
- the second light radiation has a mean direction of propagation, which is here substantially perpendicular to the input face 13E, and thus also to the output face 13S of the screen 13 .
- This mean direction of propagation corresponds, for example, to the average direction of the light rays of a second beam of light rays, in the form of which the second light radiation emerges from the second set of backlighting 12.
- the second light radiation also has a given angular width, or, otherwise, a given angular dispersion.
- This angular width corresponds for example to the angular width of the second beam of light rays mentioned above.
- This angular width is defined in a first plane, here approximately perpendicular to the exit face 13S of the screen 13 (plane (x, y), in FIGS. 1 and 3).
- the second backlight assembly 12 includes an optical filter 142 disposed in the path of the second light radiation between the second plate 122 and the screen 13, which sets the angular width. mentioned above.
- This optical filter 142 is for example a flap filter, formed of a film of transparent material including opaque barriers which extend, in the film, perpendicular to a mean plane of the film, the height and spacing of these barriers determining the maximum angular aperture imposed by the filter to light radiation passing through it.
- the angular aperture AGL2 of the second illumination field CH2 (FIGS. 2 and 5) is equal to, or at least determined by, the angular width presented by the second light radiation at the output of the second set of backlight.
- This angular aperture AGL2 designates, for example, the full width at half maximum ("full width at half maximum", according to the Anglo-Saxon denomination) of the angular distribution of light intensity in the second lighting field, illuminated by the second light radiation (that is, the distribution, as a function of an angular position in the second field, of the luminous intensity of the second radiation).
- the second set of backlight 12 is configured here so that the angular aperture AGL2 of the second illumination field CH2 allows several users occupying different lateral positions in front of the screen 13, to display the information displayed by it.
- the second set of backlight 12 is configured for example so that the angular aperture AGL2 of the second lighting field CH2 is between 80 and 140 degrees, or between 80 and 120 degrees.
- the display device 10; 10 'further comprises, here, an optional optical filter 14 disposed between the second set of backlight 12 and the input face 13E of the screen.
- This optional optical filter 14 is configured to limit the angular dispersion of the first and second light radiations in a second plane (plane (z, x), in FIGS. 1 and 3), here approximately perpendicular to the exit face 13S of the screen 13 and in the aforementioned foreground.
- This optional optical filter 14 can also be realized by means of a flap filter.
- the optional optical filter is omitted, and the optical filter of the second backlight assembly is configured to limit the angular dispersions of the light radiation that it transmits, both in the foreground and in the second plane. supra.
- the first backlight assembly 11; 1 1 ' is configured to emit the first light radiation with a reduced angular width, smaller than the angular width that the second light radiation at the output of the second backlight assembly 12 presents.
- the first set of backlight 1 1; 1 1 ' is more precisely configured to emit the first light radiation so that it has said reduced angular width in the aforementioned first plane, wherein the second light radiation has said given angular width.
- This optical filter 141 is for example a flap filter. It is arranged in the path of the first light radiation between the first plate 121 and the second backlight assembly 12.
- the first set of backlight 1 1; 1 1 ' also comprises, here, a diffuser 1 61, optional, disposed between the first plate 121 and the optical filter 141.
- This diffuser makes it possible to improve the uniformity of illumination of the screen 13.
- the (reduced) angular width of the first radiation is not modified, at least is slightly modified, by the optical filter 142 of the second set of backlight 12.
- the angular aperture AGL1, AGL1 'of the first illumination field CH1; CH1 '( Figures 2 and 4) is therefore equal to, or at least determined by the reduced angular width presented by the first light radiation at the output of the first set of backlight 1 1; 1 1 '.
- the first lighting field CH1; CH1 'thus has, in the first plane mentioned above, an angular aperture AGL1, AGL1' lower than that AGL2 of the second illumination field CH2. Otherwise formulated, in this first plane, the first lighting field CH1; CH1 'is angularly narrower than the second field of illumination.
- the first set of backlight 1 1; 1 1 ' is configured here so that the angular aperture AGL1, AGL1' of the first illumination field CH1; CH1 'is small enough so that, in the first lighting configuration of the screen, only a user located on the average axis DM; DM1 of the first illumination field CH1; CH1 'can view the information displayed on the screen.
- the first set of backlight 1 1; 1 ' is for example configured so that the angular opening AGL1, AGL1' of the first field lighting CH1 is between 10 and 60 degrees, or so that it is less than 40 degrees.
- the angular aperture AGL1, AGL1 'of the first illumination field CH1; CH1 ' designates, for example, as previously for the second lighting field, the full width at half height of the angular distribution of light intensity in the first lighting field, illuminated by the first light radiation.
- the display device 10; 10 'further comprises, here, a polarization recycle filter 15, disposed between the second backlight assembly 12 and the input face 13E of the screen.
- This polarization recycling filter 15, for example made by means of a film of the DBEF type produced by the company 3M, makes it possible to increase the brightness of the image generated by the display device.
- the display device 10; 10 'further comprises a control unit (not shown) programmed to control the optical transmission of the screen 13 so as to display data, and to control the ignition, selectively, according to said data to be displayed:
- control unit can be programmed to:
- control unit can be programmed to:
- the first light radiation has, at the output of the first set of backlight 1 1, a mean direction of propagation identical to, or at least close to that presented by the second light radiation at the output of the second plate 122 .
- This average axis DM is here substantially perpendicular to the output face 13S of the screen.
- the display device 10 ' is configured so that the first light radiation has, at the output of the first backlight assembly 11', an average direction of propagation. angularly offset from that of the second light radiation emerging from the second plate 122.
- the average axis DM1 of the first illumination field CH1 'and the average axis DM2 of the second illumination field CH2 are thus angularly offset with respect to each other.
- This angular offset is noted AGLD. It is for example between 5 and 30 degrees.
- the first and second lighting fields are more clearly distinguishable from each other.
- This offset makes it possible in particular to enlarge an area of the second lighting field that is not reached by the first light radiation, thus facilitating the addressing of the displayed information either to a user located in this area, or only to a user. located in the first field of illumination.
- the display device 10 ' is more precisely configured, in this second embodiment, so that the average axis DM1 of the first lighting field CHI' is substantially perpendicular to the output face 13S of the screen, and for that the average axis DM2 of the second illumination field CH2 is angularly offset from the angle AGLD relative to a direction DN perpendicular to the exit face 13S of the screen 13 (FIG. 4).
- the first backlighting assembly 11 'of the display device 10' here comprises an optical component 151, adapted to deflect the first light radiation so that it has, on leaving the first set of backlight lighting 1 1 ', said mean direction of propagation offset angularly.
- This optical component 151 here has a prismatic structure, that is to say that one of these main faces has a succession of facets each inclined with respect to an average plane defined by this main face.
- this optical component could be produced by means of a transparent parallel plate having a non-zero refractive index gradient.
- this optical component could be omitted, the above-mentioned shift being achieved by bulk tilting the first backlight assembly with respect to the second backlight assembly.
- the first vehicle 1 here a motor vehicle such as a car or a truck, comprising the display device 10 according to the first embodiment.
- Figures 4 and 5 show for their part, schematically and partially, the second vehicle 1 ', here a motor vehicle, comprising the display device 10' according to the second embodiment.
- the X axis corresponds to the longitudinal axis of the vehicle 1; 1 '. It is directed from the rear to the front of the vehicle 1; 1 ', in a direction substantially parallel to the chassis of the latter.
- the Z axis is meanwhile substantially perpendicular to the vehicle frame, and is directed from the bottom to the top.
- the first vehicle 1 and the second vehicle 1 'each comprise a driver seat 2A and a front passenger seat 2B.
- the display device 10; 10 ' is installed here in the front part of a passenger compartment of the vehicle 1; 1 ', in front of the driver's seat 2A and the front passenger seat 2B.
- the display device 10; 10 'according to the first and second embodiments is more precisely configured, here, so that, thus being installed in the passenger compartment of the vehicle 1; 1 ',
- the second lighting field CH2 at least partially includes the driver's seat 2A, including in particular a POSA position usually occupied by the driver's head of the vehicle, and that
- the first lighting field CH1; CH1 ' excludedes the driver's seat 2A, in particular excluding said POSB position.
- the display device 10; 10 ' is installed more precisely so that the first plane, in which is defined the angular aperture AGL1; AGL1 'of the first illumination field CH1, CH1', as well as the angular aperture AGL2 of the second illumination field CH2, corresponds to the plane (x, y), that is to say, so that this foreground extends substantially parallel to the chassis of the vehicle 1; 1 '.
- the display device 10; 10 ' is then configured so that, thus installed in the vehicle 1; 1 ',
- the angular aperture AGL2 of the second illumination field CH2 is sufficiently large to include at least partially the driver seat 2A, and so that
- the display device 10 is installed more precisely opposite the front passenger seat 2B (FIG. 2), for example at the level of a dashboard of the first vehicle 1, the face of 13S output of its screen 13 facing the passenger seat 2B.
- the display device 10 is arranged so that the exit face 13S of its screen 13 extends substantially perpendicularly to the longitudinal axis X of the first vehicle 1.
- the ranges of values indicated previously for the angular openings AGL1 and AGL2 generally make it possible to obtain that the first illumination field CH1 includes the POSB position and excludes the POSA position, while the second illumination field CH2 includes the POSB position.
- the display device 10' is installed approximately at equal distances from the driver's seat 2A and the front passenger seat 2B (FIGS. 4 and 5). It can for example be installed at a central console of the second vehicle 1 '.
- the exit face 13S of its screen 13 is inclined with respect to the longitudinal axis X of the second vehicle 1 'so that this exit face is oriented at least partly towards the front passenger seat 2B.
- the direction DN perpendicular to the exit face 13S of the screen 13 is then angularly offset, by an angle AGLI, with respect to the longitudinal axis X of the second vehicle.
- the angle AGLI is formed here, between the longitudinal axis X and the direction DN, in the plane (x, y), that is to say in a plane substantially parallel to the chassis of the vehicle. It is for example between 10 and 30 degrees.
- the ranges of values indicated above for the angular apertures AGL1 'and AGL2, and for the angular offset AGLD generally make it possible to obtain that the first illumination field CH1 includes the POSB position and excludes the POSA position, while the second lighting field CH2 includes the position POSB.
- the display device according to the teachings of the invention can of course be used in a different context from that presented above. It can for example advantageously equip a laptop.
- the display device could be configured so that the first and second lighting fields are angularly offset relative to one another, while having openings angular equal, or at least close (unlike the second embodiment described above, wherein the second field is wider than the first).
- the electronic control unit is configured to control alternately, from repeatedly over time:
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Details Of Measuring Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1750900A FR3062485B1 (fr) | 2017-02-02 | 2017-02-02 | Dispositif d'affichage |
| PCT/EP2018/052454 WO2018141823A1 (fr) | 2017-02-02 | 2018-01-31 | Dispositif d'affichage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3577390A1 true EP3577390A1 (fr) | 2019-12-11 |
Family
ID=58739096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18701768.6A Pending EP3577390A1 (fr) | 2017-02-02 | 2018-01-31 | Dispositif d'affichage |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3577390A1 (fr) |
| FR (1) | FR3062485B1 (fr) |
| WO (1) | WO2018141823A1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6487606B2 (ja) | 2015-11-27 | 2019-03-20 | ジオプティカ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツングSioptica Gmbh | 自由動作モード及び制限動作モード用のスクリーン |
| DE102017006285A1 (de) | 2017-06-30 | 2019-01-03 | Sioptica Gmbh | Bildschirm für einen freien und einen eingeschränkten Sichtmodus |
| DE102017007669A1 (de) | 2017-08-14 | 2019-02-14 | Sioptica Gmbh | Bildschirm für einen freien und einen eingeschränkten Sichtmodus und Verwendung desselben |
| DE102021104330A1 (de) | 2021-02-23 | 2022-08-25 | Bayerische Motoren Werke Aktiengesellschaft | Anwenderschnittstelle, Fortbewegungsmittel sowie Lenkrad für ein Fortbewegungsmittel mit transparenter Anzeigeeinrichtung |
| CN216848405U (zh) * | 2022-03-11 | 2022-06-28 | 中强光电股份有限公司 | 背光模块及显示装置 |
| GB2636702A (en) * | 2023-12-19 | 2025-07-02 | Continental Automotive Tech Gmbh | A dual-viewing mode motor vehicle display system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896897A2 (fr) * | 1997-08-14 | 1999-02-17 | Mannesmann VDO Aktiengesellschaft | Unité d'affichage pour la fixation dans une automobile |
| US20080112187A1 (en) * | 2006-11-15 | 2008-05-15 | Citizen Electronics Co., Ltd. | Backlight Unit and Display Apparatus Having the Same |
| US7430028B2 (en) * | 2004-11-19 | 2008-09-30 | Au Optronics Corp. | Viewing-angle adjustable liquid crystal display and method for adjusting the same |
| US20080285306A1 (en) * | 2004-06-24 | 2008-11-20 | Ryohei Sugihara | Image Display Apparatus and In-Vehicle Image Display Apparatus |
| WO2015121398A1 (fr) * | 2014-02-17 | 2015-08-20 | Sioptica Gmbh | Système d'éclairage commutable et son utilisation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI312883B (en) * | 2005-01-24 | 2009-08-01 | Au Optronics Corp | Backlight module for 3d display device and method for displaying 3d images utilizing the same |
| KR101318497B1 (ko) * | 2009-12-02 | 2013-10-16 | 미쓰비시덴키 가부시키가이샤 | 액정 표시 장치 |
| CN105487292A (zh) * | 2016-01-15 | 2016-04-13 | 京东方科技集团股份有限公司 | 背光模组、显示装置及其驱动方法 |
-
2017
- 2017-02-02 FR FR1750900A patent/FR3062485B1/fr active Active
-
2018
- 2018-01-31 EP EP18701768.6A patent/EP3577390A1/fr active Pending
- 2018-01-31 WO PCT/EP2018/052454 patent/WO2018141823A1/fr not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0896897A2 (fr) * | 1997-08-14 | 1999-02-17 | Mannesmann VDO Aktiengesellschaft | Unité d'affichage pour la fixation dans une automobile |
| US20080285306A1 (en) * | 2004-06-24 | 2008-11-20 | Ryohei Sugihara | Image Display Apparatus and In-Vehicle Image Display Apparatus |
| US7430028B2 (en) * | 2004-11-19 | 2008-09-30 | Au Optronics Corp. | Viewing-angle adjustable liquid crystal display and method for adjusting the same |
| US20080112187A1 (en) * | 2006-11-15 | 2008-05-15 | Citizen Electronics Co., Ltd. | Backlight Unit and Display Apparatus Having the Same |
| WO2015121398A1 (fr) * | 2014-02-17 | 2015-08-20 | Sioptica Gmbh | Système d'éclairage commutable et son utilisation |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2018141823A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018141823A1 (fr) | 2018-08-09 |
| FR3062485A1 (fr) | 2018-08-03 |
| FR3062485B1 (fr) | 2021-01-08 |
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