• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for displaying a pattern (1), said display device being intended to be integrated in a portable object such as a timepiece and comprising a lenticular network (8) through which is seen the pattern (1) and which is formed of a plurality of juxtaposed cylindrical lenses (10) extending parallel to each other. The cylindrical lenses (10) of the lenticular array (8) have a focal length such that the focal plane of the cylindrical lenses (10) coincides with the plane in which the pattern (1) extends. The pattern (1) is fragmented into straight strips (2) which extend parallel to one another, the straight strips (2) of the pattern (1) being nested between transparent rectilinear strips (6), so that there is always a rectilinear strip (2) of the pattern (1) located between two transparent strips (6). The rectilinear strips (2) of the pattern (1), just like the rectilinear transparent strips (6), follow each other with a pitch which is the same as that with which the cylindrical lenses (10) of the lenticular network (8) which covers the motif (1) succeed one another. Depending on the angle of view of an observer, the lenticular network (8) appears transparent or displays the pattern (1).
    公开号:CH711421A2
    申请号:CH01136/15
    申请日:2015-08-05
    公开日:2017-02-15
    发明作者:François Nicolas
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a display device for a portable object such as a timepiece. The present invention particularly relates to a display device for a portable object having a changing appearance depending on the angle at which the observer looks at this display device.
    Technological background of the invention
    In the state of the art, the term lenticular lens array designates a network formed of a layer of juxtaposed cylindrical lenses which extend parallel to each other. Most often, these lenses called "cylindrical" are not literally cylindrical. It will be understood that the term "cylindrical lens" is to be used here in a broad sense and refers to any lens having an optical axis O-O and having, in cross section, an invariant profile over its entire length.
    Note that lenticular networks are already known as such. Lenticular arrays suitable for carrying out the invention are even commercially available from several companies. These networks are generally in the form of sheets of relatively large size that can be cut to the desired size. These lenticular sheets are made of a transparent and stable material. They normally have a smooth back surface that allows to fix the sheet on a substrate.
    [0004] A known use of lenticular arrays consists in arranging a representation of two different patterns under a lenticular lens array. Depending on the angle at which the observer looks at the patterns, he will first perceive one of the patterns, then the other pattern different from the first one, which allows to create a changing dynamic display. The representation of the two patterns can be carried by a substrate and be covered by the lenticular lens array. According to one variant, the lenticular network may itself constitute the plane that carries the patterns to be displayed. According to this latter variant, the patterns are applied directly to the smooth surface of the lenticular sheet, for example by printing.
    The cylindrical lenses of the lenticular arrays have a focal length such that the focal plane of the lenses coincides with the plane in which the patterns to be displayed extend. The patterns to be displayed are usually fragmented into straight strips that are nested so that there is always a straight strip of the second pattern between two straight strips of the first pattern. It is also noted that the rectilinear bands of the first pattern, just like the rectilinear strips of the second pattern, follow each other with a pitch which is the same as that with which the cylindrical lenses of the lenticular network which covers the group of characters are repeated.
    It is therefore understood from the foregoing that lenticular lens arrays have heretofore always been used to display two different patterns and thus create a changing dynamic display, or to display the same pattern but in two sizes different to create a zoom effect.
    Summary of the invention
    The present invention aims to propose a new application of a lenticular lens array.
    For this purpose, the present invention relates to a device for displaying a pattern, this display device being intended to be integrated into a portable object and comprising a lenticular network through which is seen the pattern and which is formed of a plurality of juxtaposed cylindrical lenses extending parallel to each other, the cylindrical lenses of the lenticular array having a focal length such that the focal plane of the cylindrical lenses coincides with the plane in which the pattern, the pattern being fragmented into straight strips that extend parallel to each other, the rectilinear strips of the pattern being nested between transparent rectilinear strips, so that there is always a band of the pattern located between two transparent strips, the rectilinear bands of the pattern, just like the straight rectilinear bands, succeeding each other with a step which is the same as that ui with which the cylindrical lenses of the lenticular network that covers the pattern succeed one another.
    Note that the term "cylindrical" is to be taken in the broad sense, the expression "cylindrical lens" here designating any lens having an optical axis and having, in cross section, a constant profile over its entire length.
    It should also be noted that the "orientation" of a cylindrical lens corresponds to the orientation of the optical axis of this lens.
    With these features, the present invention provides a device for displaying a pattern in which the pattern, covered by a lenticular array formed of a plurality of juxtaposed cylindrical lenses, is fragmented into rectilinear strips interleaved between strips. transparent, the rectilinear bands of the pattern, just as the transparent rectilinear bands, succeeding each other with a step which is the same as that with which the cylindrical lenses of the lenticular network which covers the pattern succeed one another. It is thus understood that, according to the angle at which the observer looks at the lenticular network, the observer sees either the pattern on an enlarged scale, or what is behind the lenticular network because the lenticular network appears transparent.
    [0012] To the knowledge of the Applicant, this is the first time it is proposed to use a lenticular network not to display two different images depending on the angle under which we look at the lenticular network, but to move from a first state in which a pattern is visible, to a second state in which the lenticular array is transparent and allows to see what is behind it. The prior art solutions of alternately displaying two different patterns depending on the angle at which the observer looks at the lenticular lattice of cylindrical lenses therefore tend to distract the skilled person from the present invention who teaches using a lenticular network, display only one pattern and leave one of two transparent cylindrical lenses so that, for a given angle of view, the lenticular network appears transparent and leaves visible what is placed behind it.
    According to a first embodiment of the invention, the lenticular network which covers the pattern has a smooth back surface which constitutes the plane in which the pattern is formed.
    According to a second embodiment, the plane in which the pattern is formed is constituted by a portion of the surface of a transparent dial.
    According to a third variant, the colored bands that form the pattern to be displayed are applied to a thin plastic sheet placed between a transparent substrate and the lenticular array.
    With these features, it is possible to print the colored bands that form the pattern to be displayed by any suitable printing technique such as digital printing still known as the English name Digital Printing. The patterns to be displayed can be printed on a large plastic sheet which is then secured under a lenticular network sheet of the same size, the resulting assembly then being cut into the desired shape.
    Brief description of the figures
    Other features and advantages of the present invention will emerge more clearly from the detailed description which follows of an embodiment of the display device according to the invention, this example being given for purely illustrative and not limiting purposes only. , in connection with the appended drawing in which:<tb> fig. 1A <SEP> is a block diagram illustrating in plan view a circular-shaped pattern carried by a flat surface and formed of a succession of colored rectilinear strips extending parallel to each other and nested between transparent rectilinear strips, so that there is always a band of the colored pattern located between two transparent bands;<tb> fig. 1B <SEP> is a cross-sectional view of a lenticular array in the case where the colored bands forming the pattern to be displayed are applied directly to the smooth verso surface of the lenticular array shown in FIG. 1A;<tb> fig. 1C <SEP> is a view similar to that of FIG. 1B in the case where the colored bands which form the pattern to be displayed are applied to a substrate and covered by the lenticular network illustrated in FIG. 1A;<tb> fig. 1D <SEP> is a view similar to that of fig. 1B in the case where the colored bands which form the pattern to be displayed are applied on a thin film placed between a transparent substrate and the lenticular network illustrated in FIG. 1A;<tb> fig. 2 <SEP> is a perspective view of the lenticular array of FIG. 1B;<tb> figs. 3A and 3B <SEP> are schematic views illustrating which color band or transparent band is visible to the observer depending on whether the observer's eyes are on either side of the plane passing through the optical axis of the cylindrical lens and through the eyes of the observer;<tb> figs. 4A and 4B <SEP> are diagrammatic top views of the display device according to the invention in the case where the pattern is formed of a succession of rectilinear colored strips extending parallel to each other and nested between strips rectilinear transparent;<tb> figs. 5A and 5B <SEP> are schematic top views of the display device according to the invention in the case where the pattern corresponds to hourly indexes forming the hour circle of a timepiece, and<tb> fig. 6 <SEP> is a schematic view of the method of manufacturing the display device according to the invention when the patterns to be displayed are printed on a large thin sheet which is then secured in a lenticular network sheet of the same dimensions, the whole resultant being then cut into the desired shape.
    Detailed description of an embodiment of the invention
    The present invention proceeds from the general inventive idea of using a lenticular array formed of a plurality of cylindrical lenses juxtaposed not to display two distinct patterns alternately visible depending on the angle under which the observer looks at the network lenticular, but to pass such a lenticular network from a state in which it displays a pattern to a state in which it appears transparent to the observer and leaves visible what is placed behind him.
    The present invention will be described with reference to a circular colored dial particularly suitable for being housed in a box of a portable object such as a watch, a mobile phone or a measuring instrument. It will be understood, however, that the present invention is not limited to such an embodiment and that the dials formed by the lenticular lens arrays can deviate from a circular shape by being for example square or rectangular, while the patterns visible under the lenticular networks can be at the choice of numbers, letters, a logo, a decorative pattern or other. Similarly, it is also possible to display a pattern by means of a fixed or dynamic display, for example of the LCD type or the like.
    FIG. 1A is a schematic top plan view of a circular pattern to be displayed which is carried by a flat surface. Fig. 1B is a cross-sectional view of a lenticular array disposed above the display pattern of FIG. 1A.
    Designated as a whole by the general numerical reference 1, the pattern to be displayed is fragmented according to a plurality of rectilinear colored strips 2 extending in a plane 4 parallel to each other and nested between transparent rectilinear strips 6 free of any marking, so that there is always a colored band 2 of the pattern 1 to be displayed located between two transparent bands 6.
    According to the invention, the pattern 1 to be displayed is covered by a lenticular network 8 formed of a layer of juxtaposed cylindrical lenses 10 which extend parallel to each other. As can be seen in the cross-section of FIG. 1 B, the "cylindrical" lenses 10 are not literally cylindrical. It will be understood that the term "cylindrical" is to be understood here in a broad sense, according to which the expression "cylindrical lens" designates any lens having an O-O optical axis and having, in cross-section, an invariant profile over any its length.
    As already mentioned above, lenticular networks are already known as such. They are generally in the form of leaves of relatively large size that can be cut to the desired size. These lenticular sheets are made of a transparent and stable material and normally have a smooth back surface 12 which makes it possible to fix the sheet on a substrate.
    According to an advantageous embodiment of the invention, the smooth reverse surface 12 of the lenticular array 8 can thus constitute the plane 4 which carries the pattern 1 to be displayed. According to this variant, the colored bands 2 which form the pattern 1 to be displayed are applied directly on the smooth verso surface 12 of the lenticular network 8, for example by printing. To illustrate this variant, it is shown in FIG. 1B dark areas at the base of the lenticular network 8 which materialize the ink used to print the rectilinear colored strips 2. In the case of this variant, we can consider that the lenticular network 8 alone form the dial of the object portable.
    According to another variant illustrated in FIG. 1C, the rectilinear colored strips 2 are printed on a transparent substrate 14 and are covered by the lenticular network 8. The pattern 1 to be displayed is sandwiched between the lenticular network 8 and the transparent substrate 14, the assembly forming the dial intended to be integrated into the portable object.
    According to another variant illustrated in FIG. 1D, the colored rectilinear strips 2 which form the pattern 1 to be displayed are applied to a thin plastic sheet 16 placed between a transparent substrate 18 and the lenticular network 8.
    According to the invention, the cylindrical lenses 10 of the lenticular array 8 have a focal length such that the focal plane F of the cylindrical lenses 10 coincides with the plane 4 in which the pattern 1 extends. again referring to FIGS. 1A and 1B, it can be observed that the rectilinear strips 2 of the pattern 1 to be displayed, just like the transparent rectilinear strips 6, follow each other with a pitch which is the same as that with which the cylindrical lenses 10 of the lenticular network 8 which covers the pattern 1 to display succeed each other.
    Assuming that each of the cylindrical lenses 10 is split by a vertical plane P1 into first and second halves 10a and 10b of the same width L, the first half 10a of the cylindrical lens 10 covers at least one rectilinear colored strip 2 of the pattern 1 to be displayed, and the second half 10b of the cylindrical lens 10 covers at least one transparent strip 6. It is important to note that this is a simplified variant embodiment of the invention. Indeed, the progress made in recent years in the field of print resolution are such that it is now quite possible to have under the same cylindrical lens several rectilinear strips of the pattern to be displayed nested between transparent bands.
    The operation of the invention will now be explained with reference to FIGS. 2 and 3A, 3B. As we have seen, the cylindrical lenses 10 of the lenticular array 8 have a focal length such that the focal plane F of the lenses coincides with the plane 4 in which the pattern 1 to be displayed extends. Under these conditions, each cylindrical lens 10 returns towards the eyes of an observer 20 the image of only one of the straight strips 2 or 6. This rectilinear strip is that which lies on either side of a plane P2 passing through the optical axis O-O of the cylindrical lens 10 and the eyes of the observer 20. It will therefore be understood that since the cylindrical lenses 10 of the lenticular array 8 are oriented in the same direction as the strips rectilinear lines 2, 6 that these cylindrical lenses 10 cover, this allows the observer to see the pattern 1, or to see through the lenticular network 8 by transparency effect.
    More specifically, when the observer 20 looks at the lenticular network 8 with the eyes placed on one side of the plane P2, the observer 20 sees the image formed by the rectilinear colored strips 2. When on the contrary, the The observer's eyes are placed on the other side of the plane P2, he sees the transparent rectilinear strips 6. In other words, either the lenticular network 8 returns to the observer 20 the image of the pattern 1 to be displayed, or the network Lenticular 8 appears transparent in view of the observer 20. The two aspects of the lenticular network are swung according to the viewing angle, creating a changing dynamic aspect. In order to obtain a clear image of the pattern 1 to be displayed, it is advantageous to have rectilinear strips 2 and 6 which are very thin. For this purpose, for example, a 40 LPI lenticular array (40 cylindrical lenses per inch) can be used. It can be calculated that the width of the cylindrical lenses of such a network is about 2/3 of a millimeter. Under these conditions, the width of the straight strips can be about 1/3 of a millimeter.
    Figs. 4A and 4B are diagrammatic top views of the display device according to the invention in the case where the pattern 1 to be displayed is formed of a succession of rectilinear colored strips 2 extending parallel to each other and nested between Transparent rectilinear strips 6. The dial formed by the lenticular network 8 and the transparent substrate 14 on which the rectilinear colored strips 2 are printed is housed in a wristwatch box 22 which comprises 24 hour and 26 minute hands driven. by a clockwork movement 28. When the observer 20 looks at the wristwatch 22 at a first angle, the dial appears colored to him. When the observer 16 watches the wristwatch 22 at a second angle, the dial appears transparent to him and he can see the watch movement 28 through the dial.
    Figs. 5A and 5B are schematic top views of the display device according to the invention in the case where the pattern corresponds to hourly indexes forming the hour turn 30 of a timepiece. Under a first viewing angle, the observer sees the hour markers of the hour turn 30 in addition to the watch movement 28. Under a second viewing angle, the dial is transparent and the observer only sees the movement of the watch. watchmaking 28 placed behind it.
    FIG. 6 is a schematic view of the manufacturing method of the display device according to the invention when the patterns 1 to be displayed are printed on a large plastic sheet 16 which is then secured in a lenticular network sheet 8 of the same dimensions, resulting assembly being then cut into the desired shape.
    It goes without saying that the present invention is not limited to the embodiments that have just been described and that various modifications and simple variants can be envisaged by the skilled person without leaving the dial of the invention. as defined by the appended claims. It will be noted in particular that the color bands are sufficiently thin and sufficiently close to each other so that, when the user is in a position in which he perceives the colored bands, he has the perception of a uniformly colored dial.
    Nomenclature
    [0035]<tb> Reason to display 1 <SEP><tb> Straight colored strips 2 <SEP><tb> Plan 4 <SEP><tb> Transparent straight strips 6 <SEP><tb> Lenticular Network 8 <SEP><tb> Layer of cylindrical lenses 10 <SEP><tb> Surface Smooth Back 12 <SEP><tb> Transparent Substrate 14 <SEP><tb> F Focal Area> SEP><tb> Vertical plane P1 <SEP><tb> First and second halves 10a and 10b <SEP><tb> Width L <SEP><tb> P2 Plan <SEP><tb> O-O optical axis <SEP><tb> Thin sheet 16 <SEP><tb> Transparent Substrate 18 <SEP><tb> Observer 20 <SEP><tb> Wristwatch Box 22 <SEP><tb> 24 hour and 26 minute hands <SEP><tb> Watch movement 28 <SEP><tb> Hourly hourly indexes 30 <SEP>
    权利要求:
    Claims (4)
    [1]
    1. Device for displaying a pattern (1), this display device being intended to be integrated in a portable object and comprising a lenticular network (8) through which the pattern (1) is seen, the lenticular network (8) being formed of a plurality of juxtaposed cylindrical lenses (10) extending parallel to each other, the cylindrical lenses (10) of the lenticular array (8) having a focal length (F) such that the focal plane of the cylindrical lens (10) coincides with the plane (4) in which the pattern (1) extends, the pattern (1) being fragmented into straight strips (2) which extend parallel to one another, the rectilinear strips (2) of the pattern (1) being nested between transparent rectilinear strips (6), so that there is always a rectilinear strip (2) of the pattern (1) located between two transparent strips (6), the rectilinear strips (2) of the pattern (1), just like the rectilinear strips s transparent (6), succeeding with a step which is the same as that with which the cylindrical lenses (10) of the lenticular array (8) which covers the pattern (1) succeed one another.
    [2]
    2. Display device according to claim 1, characterized in that the lenticular network (8) which covers the pattern (1) has a smooth back surface (12) which constitutes the plane (4) in which the pattern is formed ( 1).
    [3]
    3. Display device according to claim 1, characterized in that the plane (4) in which is formed the pattern (1) is constituted by a portion of the surface of a transparent substrate (14) on which is secured the lenticular network (8).
    [4]
    4. Display device according to claim 1, characterized in that the plane (4) in which is formed the pattern (1) is constituted by a portion of the surface of a thin sheet (18).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP1820069B1|2008-05-21|Timepiece comprising a light guide performing a glass function
    EP2798396B1|2020-07-15|Manufacturing method of a security device
    BE395357A|1933-04-29|Process for decorating objects and objects obtained using this process
    EP3062172A1|2016-08-31|Watch provided with a magnifying glass
    EP2874024A1|2015-05-20|Mother-of-pearl dial for concealed display
    FR2851496A1|2004-08-27|Object e.g. jewel, decorating method, involves obtaining graphic art by photolithographic, where art is to be read by enlarging device, and arranging graphic arts on transparent substrate
    EP3128359A1|2017-02-08|Display device for a portable object such as a timepiece
    FR2954978A1|2011-07-08|VARIABLE OPTICAL EFFECT DEVICE
    CH711421A2|2017-02-15|A display device for a portable object such as a timepiece comprising a lenticular array.
    EP3032357B1|2017-05-03|Display device for a portable object such as a timepiece
    CH710775A2|2016-08-31|Watch equipped with a magnifying glass.
    CH710452A2|2016-06-15|A display device for a portable object such as a timepiece.
    EP3037897B1|2020-04-29|Method of manufacturing a display dial for a portable objectsuch as a timepiece and display dial
    EP3418817B1|2019-12-11|Display device for a timepiece
    EP3839617A1|2021-06-23|Liquid crystal display device
    WO1991000554A1|1991-01-10|Device for presentation of information via optical effects, for particular use with measuring apparatus
    CH713785B1|2018-11-15|Dial for a timepiece and its manufacturing process.
    CA3008045A1|2017-06-22|Smart card with customized translucent edges
    EP3727872B1|2022-02-16|Optical security component visible in reflection, manufacture of such a component, and secure document provided with such a component
    CH716960A2|2021-06-30|Liquid crystal display device.
    EP3842875A1|2021-06-30|Mechanism for displaying the phases of the moon
    EP3521945B1|2021-04-07|Dial for timepiece and method for manufacturing same
    CH708838B1|2017-11-30|Display set with a hidden display under a semi-reflective element.
    CH717537B1|2021-12-30|Method of manufacturing a digital display device and digital display device.
    FR2905474A1|2008-03-07|Image e.g. moving picture, display device for e.g. three-dimensional TV, has lenticular array including set of elementary optical devices each with convergent elementary lens, and screw to adjust dimensions of image to dimensions of array
    同族专利:
    公开号 | 公开日
    CH711421B1|2019-06-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01136/15A|CH711421B1|2015-08-05|2015-08-05|Display device for a portable object such as a timepiece comprising a lenticular network.|CH01136/15A| CH711421B1|2015-08-05|2015-08-05|Display device for a portable object such as a timepiece comprising a lenticular network.|
    [返回顶部]