• 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 an electroluminescent display needle (1) for a portable object, such as a timepiece or a measuring instrument for providing a watch or measuring indication. The portable object comprises an electric power source (11). The display needle comprises an arrangement of two diodes (3, 13) mounted head to tail, one connected in parallel with the other. At least one of the two diodes is a light emitting diode. The two diodes are arranged to be connected to the power supply source (11) of the portable object. According to the invention, the set of display hands (1, 2) makes it possible, for example, to change the color or the electroluminescent state of at least one of the display hands (1, 2) according to the direction of polarization of the electric circuit.
    公开号:CH714465A2
    申请号:CH01557/17
    申请日:2017-12-19
    公开日:2019-06-28
    发明作者:Sagardoyburu Michel
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    TECHNICAL FIELD OF THE INVENTION
    The present invention relates to an electroluminescent display needle for a portable object, such as a timepiece, or for a measuring instrument. The timepiece is preferably a wristwatch with analog time display by at least one or two electroluminescent needles.
    The present invention also relates to a set of electroluminescent display needles for a timepiece, such as a wristwatch, or for a portable measuring instrument.
    STATE OF THE ART
    For a traditional timepiece, such as a watch, the time display is presented by means of one or more hands arranged on a watch face and below a watch glass. The needle or needles are mounted on a central shaft to rotate for example around the same axis of rotation being driven by a set of gear wheels of the watch movement. Like the hour markers on the dial, the needle (s) may be coated with a phosphorescent or fluorescent layer so as to be visible in the dark either after absorbing or converting light from a natural source or light source. 'a source of light, which can be part of the timepiece.
    In addition to indicating the current time, the needles of the watch can also play a decorative role contributing largely to the aesthetic appearance of the watch they equip. However, a disadvantage of this illumination technique is that the layer of phosphorescent material needs to be previously illuminated by a light source before generating light in the dark. In addition, phosphorescence light emission is limited in time.
    It is also known to provide one or more watch hour hands with at least one discrete light source, such as a light emitting diode, powered by a power supply source. electric, which can include a battery in the watch.
    As such, FIG. 1 represents a display pointer 1, which comprises on at least a first face 9 a light-emitting diode 3 with a transmission zone 23. The display needle 1 comprises at one end a hole 8 to be fixed on an axis drive 10 of tubular or solid form. The light-emitting diode 3 is connected to a first connection terminal defined as the anode with a first conductive track 5, and a second connection terminal defined as the cathode with a second conductive track 7. The conductive tracks 5, 7 are connected via the drive shaft 10 to an electric power supply source in the watch to receive at least one bias current to activate said light emitting diode 3.
    [0007] FIG. 2 shows an electrical circuit of a set of electroluminescent display needles 1 and 2. The first needle 1 comprises a first light-emitting diode 3 and the second needle 2 comprises a second light-emitting diode 3 '. The first and second light-emitting diodes 3, 3 'are connected in series with the cathode terminal of the first diode 3 connected to the anode terminal of the second diode 3' via an intermediate conducting track. The first conductive track 5 connected to the anode terminal of the first light-emitting diode 3 is connected to a first terminal of an electric power supply source 11. The second conductive track 7 'connected to the cathode terminal of the second light-emitting diode 3 'is connected to a second terminal of the electric power supply source 11. This electric power supply source 11 may be composed of a battery or a charge storage means originating from a source of extra energy, such as a solar cell or other. It provides at least one bias current in a polarization direction to the light emitting diodes 3, 3 'to illuminate them.
    There may be mentioned the patent application WO 97/28 424 A1, which describes a set of luminous display needles for a watch, which comprises a source of power supply. At least two needles are provided, each of which has its own light source in the form of a light-emitting diode. The two electroluminescent diodes are connected to the power source by conductive tracks arranged partly in the axis of driving the needles. Disadvantages of this set of luminous needles are that they can be activated to generate light only in a single direction of electric polarization of the power source, and moreover, they are necessarily both activated at the same time. time.
    EP 2 950 168 B1 discloses a set of luminous display needles for a watch in which is housed a source of electrical power supply. Two superimposed luminous display hands are provided with each a hole for the passage of a drive shaft. The driving axis of the second needle is arranged concentrically inside the driving axis of the first needle with the interposition of an insulating layer between the two drive axes. Each of the needles has its own light source, such as a light-emitting diode. The two light sources are connected in series to the power supply source via conductive tracks passing through the drive axes of the first and second needles. Disadvantages of this set of luminous needles are that they can be activated to generate light only in a single direction of electric polarization of the power source, and moreover, they are necessarily both activated at the same time. time.
    SUMMARY OF THE INVENTION
    The invention aims to provide an electroluminescent display needle for a portable object, such as a timepiece, or for a measuring instrument overcoming the aforementioned drawbacks of the state of the art by a arrangement of two diodes on the needle which are easily connected to a source of electrical power supply in the portable object for generating light in at least one polarization direction.
    For this purpose, the invention relates to an electroluminescent display needle, which comprises the features mentioned in the independent claim 1.
    Particular shapes of the electroluminescent display needle are defined in the dependent claims 2 to 8.
    An advantage of the electroluminescent display needle lies in the fact that it comprises on at least one face of a base of the needle or made in said base an arrangement of two diodes mounted head to tail one connected in parallel with each other and with at least one of the two light-emitting diodes. The first light-emitting diode is powered to generate light in a first polarization direction by the power source, while the second diode is non-conductive.
    Advantageously, the two diodes of the arrangement are electroluminescent diodes. Thus, the first light-emitting diode is powered to generate light in a first polarization direction by the power source, while the second light-emitting diode is non-conductive and does not generate light. Conversely, for a second polarization direction opposite to the first polarization direction, the second light-emitting diode generates a light, while the first light-emitting diode remains off.
    Advantageously in the case where the arrangement comprises a first light emitting diode and a second single diode, only the first light emitting diode is illuminated according to the first direction of polarization of the electric power supply source. The second single diode becomes conductive in the second polarization direction of the electric power source while the first light emitting diode remains off. This second diode is primarily used to protect the arrangement of diodes including against possible electrostatic discharges, or also if the power supply of the diodes is an alternating or pulsed supply.
    Advantageously, the diodes are light emitting diodes (LED) or organic light emitting diodes (OLED). The first diode emits light of a first color, while the second diode emits light of a second color different from the first color. This may be advantageous for an indication of a time zone in the case of use in an electromechanical watch.
    Advantageously, the two diodes are made at the same time with structuring of the layers and with only two connection contacts for connecting the diode arrangement to the power supply source.
    To this end, the invention also relates to a set of electroluminescent display needle sets, which comprises the features mentioned in the independent claim 9.
    Particular shapes of the electroluminescent display needle set are defined in the dependent claims 10 to 21.
    An advantage of the set of electroluminescent display needle sets lies in the fact that it comprises on each needle an arrangement of two diodes mounted head to tail, one connected in parallel with the other and with at least one of the two electroluminescent diodes. The two diode arrangements are serially connected to one another and connected by conductive tracks to the power source.
    Advantageously, the two diodes of the two arrangements are electroluminescent diodes. Thus, for each arrangement, the first light-emitting diode is powered to generate light in a first polarization direction by the power source, while the second light-emitting diode is non-conductive and does not generate light. Conversely, for a second polarization direction opposite to the first polarization direction, the second light-emitting diode generates a light, while the first light-emitting diode remains off. Each light-emitting diode may generate a different color from each other light-emitting diode. This can be useful in a dark environment, to distinguish time zones, modes of operation, waking hours recorded.
    Advantageously, in the case where each arrangement comprises a first light emitting diode and a second single diode, only the first light emitting diode illuminates in the first direction of polarization of the electric power supply source. The second single diode becomes conductive in the second polarization direction of the electric power source while the first light emitting diode remains off. This second diode is primarily used to protect the arrangement of diodes in particular against possible electrostatic discharges, or also if the power supply of the diodes of the arrangements is an alternating or pulsed supply.
    It can be envisaged with each arrangement having a first light-emitting diode and a second simple diode, that the first light-emitting diode of the first arrangement is illuminated in the first polarization direction with the second non-conductive single diode, whereas for the second arrangement, the first light-emitting diode remains off with the second single-conductor diode. In the second polarization direction opposite to the first polarization direction, the opposite occurs.
    It can also be envisaged that according to the two previous arrangements, the two light emitting diodes are illuminated at the same time by a source of alternating or pulsed electric power supply if the variation of voltage or current is fast enough for the eye perceives a continuous light. In addition, it is possible to use a bias current of a certain duration which can be adapted to a supply period of each light-emitting diode so as to balance the luminance between two light-emitting diodes of different surfaces or having different electroluminescent properties.
    BRIEF DESCRIPTION OF THE FIGURES
    The aims, advantages and characteristics of the electroluminescent display needle and the electroluminescent display needle set will appear better in the following description on the basis of at least one embodiment of the invention. limiting illustrated by the drawings in which: FIG. 1 already cited schematically shows a view of a display needle on which is disposed a light emitting diode according to the prior art, FIG. 2 already cited is the wiring diagram of two electroluminescent diodes each respectively arranged on two display needles of a set of electroluminescent display needle sets according to the prior art, FIG. 3 schematically shows a view of a display needle on which is arranged a diode arrangement, of which at least one is a light emitting diode according to the invention, FIGS. 4a and 4b show the electrical connection diagram of two arrangements of two light-emitting diodes each respectively arranged on two display needles of a set of electroluminescent display pointers according to the invention, FIGS. 5a and 5b show a variant of the electrical diagram of FIGS. 4a and 4b for which each arrangement comprises a light-emitting diode and a single diode mounted head-to-tail according to the invention, and FIGS. 6 and 7 are respectively top and bottom views in the assembled state of a set of illuminated display hands according to the invention.
    DETAILED DESCRIPTION OF THE INVENTION
    In the following description, all the elements of the electroluminescent display needle or the electroluminescent display needle set, which are well known to a person skilled in this technical field, do not are described only in a simplified way. In particular the electroluminescent display needle pattern embodiment of FIGS. 6 and 7 is fully reproduced in FIGS. 1 and 2 of EP 2950 168 B1, which is incorporated herein by reference.
    FIG. 3 schematically represents an embodiment of an electroluminescent display needle 1 intended to equip a portable object preferably a timepiece, such as a wristwatch, or a measuring instrument, which includes a source of power supply. As for fig. 1 mentioned above, the needle 1 may include a hole to be attached to a drive shaft of a portable object, which may be a wristwatch.
    The electroluminescent display needle 1 comprises on at least a first face 9 an arrangement of two diodes 3, 13 mounted head to tail, one connected in parallel with the other and with at least one of the two light-emitting diodes. .
    For the embodiment shown in FIG. 3, these are two electroluminescent diodes 3, 13, which can be made from gallium arsenide (GaAs) or gallium nitride (GaN) or gallium phosphide (GaP) or zinc selenide ( ZnSe) for a conventional inorganic light emitting diode (LED). It can be a UV, blue or green GaN LED, or a green, orange or red GaAs or GaP LED, or a blue ZnSe LED. In the case of organic light emission diodes (OLEDs), they can be made from organic molecules. The two diodes 3, 13 may advantageously be OLED diodes, but it may also be envisaged to have one LED and the other OLED diode for the arrangement of diodes 3, 13. The use of light-emitting diodes 3, 13 flexible can also be considered.
    It should be noted that the light emitting diodes 3,13 can also be QDLED or QLED (Quantum Dot LED) or Pero-LED (LED based on Perovskite material) diodes.
    The first and second electroluminescent diodes 3, 13 each comprise a first connection terminal defined anode and a second connection terminal defined cathode. The first connection terminal of the first light-emitting diode 3 is connected by an intermediate conductive track 15 to the second connection terminal of the second light-emitting diode 13. By passing a bias current in a first polarization direction between the terminal of anode and the cathode terminal, the light-emitting diode 3 or 13 generates a light by an emission zone 23 or 23 ', whereas in a second direction of polarization opposite to the first direction of polarization the light-emitting diode remains off.
    The first light-emitting diode 3 is powered to generate light in a first direction of polarization by the power supply source, while the second light-emitting diode 13 remains off (non-conductive). To do this, the first light-emitting diode 3 is connected by a first conductive track 5 extending from its anode terminal to a first terminal of the electric power supply source, which is in this case a positive terminal of the source of power. power supply. The first light-emitting diode 3 is connected by a second conductive track 7 from its cathode terminal to a second terminal of the electrical power supply source, which in this case is a negative terminal of the electrical power supply source. . The second light-emitting diode 13 is connected by its first anode terminal to the second conductive track 7 and by its second cathode terminal to the first conductive track 5. Thus according to this connection, the second light-emitting diode 13 remains off (non-conductive) when the first light-emitting diode 3 is activated in the first polarization direction.
    The power source 11 can be arranged to reverse the direction of polarization if it comprises for example an integrated switching unit controlled by a control unit 21 of the portable object. The electric power supply source may provide a voltage or preferably a bias current for example in a second polarization direction opposite to the first polarization direction through the first and second conductive paths 5, 7 to the two diodes emitting. Under these conditions, it will be the second light-emitting diode 13 that generates light, while the first light-emitting diode 3 remains off (non-conductive).
    Figs. 4a and 4b show a set of electroluminescent display needles 1,2 which comprise two arrangements of light-emitting diodes. A first arrangement comprises two light-emitting diodes 3, 13, which are mounted on at least one face of a first needle 1, while a second arrangement comprises two light-emitting diodes 3 ', 13', which are mounted on at least one face a second hand 2.
    As explained with reference to FIG. 3, the first arrangement comprises two light-emitting diodes 3, 13 mounted head to tail, one connected in parallel with the other. The second arrangement comprises two light-emitting diodes 3 ', 13' mounted head to tail, one connected in parallel to the other. The two light emitting diode arrangements are connected in series and connected by conductive paths between a first terminal and a second terminal of the electric power supply source 11, which may be part of the assembly. The first terminal of the electric power supply source 11 may be the positive terminal and the second terminal of the electric power supply source 11 may be the negative terminal in a first polarization direction. In the second polarization direction opposite to the first polarization direction, the first terminal of the electric power supply source 11 may be the negative terminal and the second terminal of the electric power supply source 11 may be the terminal positive.
    The electric power supply source 11 of the assembly comprises in addition to a rechargeable battery or battery, for example, an integrated switching unit. In this way, according to the programmed or manually activated switching command of the control unit 21, it is possible to modify the polarization direction as explained above.
    As shown in FIG. 4a, in a first polarization direction, the first light-emitting diode 3 of the first arrangement and the first light-emitting diode 3 'of the second arrangement generate light. The second light emitting diode 13 of the first arrangement and the second light emitting diode 13 'of the second arrangement remain extinguished. In contrast to FIG. 4b in a second polarization direction, the second light emitting diode 13 of the first arrangement and the second light emitting diode 13 'of the second arrangement generate light. The first light-emitting diode 3 of the first arrangement and the first light-emitting diode 3 'of the second arrangement remain extinguished.
    It may be envisaged in addition to providing a variable bias current to light emitting diode arrangements 3, 13, 3 ', 13' in a first polarization direction or a second polarization direction. According to the two arrangements, it can be provided that the two light emitting diodes are illuminated at the same time by the source of alternating or pulsed electrical energy supply. If the variation of voltage or bias current is fast enough, the eye of the person carrying the portable object, such as a wristwatch, will perceive a continuous light. In addition, it is possible to use a bias current of a certain duration which can be adapted to a supply period of each light-emitting diode so as to balance the luminance between two light-emitting diodes of different surfaces or having different electroluminescent properties.
    It can also be expected to flash each light emitting diode to be visible to the human eye. The two electroluminescent needles may flash at the same rate or offset relative to each other. It can also be expected to have one of the electroluminescent needles illuminated continuously and the other hand flashing. For each diode arrangement of the needles, there may also be a diode of the arrangement that emits a flashing light, while the other diode of the arrangement emits a continuous light. The flashing of at least one of the hands or diodes makes it possible to indicate a function of the portable object or that one is in setting mode.
    The light-emitting diodes 3, 13 of the first diode arrangement and the light-emitting diodes 3 ', 13' of the second diode arrangement may be structured in a size that covers all or part of a surface of each needle with the area d emission covering all or part of this needle surface. One of the two diodes of each arrangement may have a different shape emitting surface of the other diode. It can also be expected to achieve a structure in the form of a decor, a pattern or logo or text, or different color for each light emitting diode.
    It may be provided to have a first light emitting diode 3 of the first diode arrangement generating a light of a first color, and a second light emitting diode 13 of the first diode arrangement generating light of a second color different from the first color. The same applies to the second arrangement of diodes, whose first light-emitting diode 3 'generates a light of a third color and the second light-emitting diode 13' generates a light of a fourth color different from the third color. The first, second, third and fourth colors may all be different, but it may also be expected to have the first color identical to the third color and the second color identical to the fourth color.
    Figs. 5a and 5b represent as for figs. 4a and 4b, a set of electroluminescent display pointers 1, 2, which comprise two diode arrangements. However, unlike the embodiment shown in FIGS. 4a and 4b, the second diode 13 of the first diode arrangement is a conventional diode 13, and the first diode of the second arrangement is a conventional diode 3 '. The two diode arrangements are connected in series and connected by conductive paths between a first terminal and a second terminal of the electric power supply source 11, which may be part of the assembly.
    In FIG. 5a in a first polarization direction, the first light emitting diode 3 of the first arrangement generates a light and the first diode 3 'of the second arrangement is conductive. The second diode 13 of the first arrangement is non-conductive and the second light emitting diode 13 'of the second arrangement remains off. In contrast to FIG. 5b in a second polarization direction, the second light emitting diode 13 'of the second arrangement generates light and the second diode 13 of the first arrangement is conductive. The first light-emitting diode 3 of the first arrangement remains off and the first diode 3 'of the second arrangement is non-conductive.
    As can be seen in the embodiment of FIGS. 5a and 5b, in the first polarization direction, only the first needle 1 is illuminated, while the second needle 2 remains off. In contrast in the second direction of polarization, it is the second needle 2 which generates light, while the first needle 1 remains off. The illumination color of the first needle 1 may be different from the illumination color of the second needle 2.
    It should also be noted that the diodes of each arrangement can be made on at least one face of each needle, and can extend from the attachment to the drive shaft at the end of the indication of the needle. 'needle.
    According to a more detailed embodiment shown in FIGS. 6 and 7, a set of needles comprises first and second electroluminescent display needles 1 and 2. The first light display needle 1 is formed of a first annular element 4 extended by a portion extending substantially rectilinearly. The first annular element 4 has at its center a hole 8 for the passage of a drive shaft 10 of the first luminous display needle 1. The first annular element 4 is provided with an upper surface portion 12 directed from the side of an observer, and a lower surface portion 14 opposite the upper surface portion 12. The upper and lower surface portions 14 and 14 of the first annular member 4 are interconnected along their perimeter by a lateral surface 16. The first annular element 4 may be coated with a layer of an electrically conductive material on its upper surface portions 12 and lower 14 and in the hole 8 in which is engaged the drive shaft 10.
    In a similar manner to the first light display needle 1, the second light display needle 2 is formed of a second annular element 18 extended by a portion that extends substantially rectilinearly. The second annular element 18 of the second light-indicator needle 2 has at its center a hole 22 for the passage of a drive shaft 24 arranged concentrically inside the drive shaft 10 of the first hand The second annular element 18 is provided with an upper surface portion 26 directed towards an observer, and a lower surface portion 28 opposed to the upper surface portion 26. The portions of FIG. upper surface 26 and lower 28 of the second annular element 18 are connected to each other along their perimeter by a lateral surface 30. According to a characteristic of the invention which will be described in more detail below, the second annular element 18 is also coated with a layer of an electrically conductive material on its upper surface portions 26 and lower 28 and in the hole 22 in which is in guaranteed the drive shaft 24.
    The first light display needle 1 carries a first arrangement 32 of light emitting diodes and the second light display needle 2 carries a second arrangement 34 of light emitting diodes. The first and second arrangements 32 and 34 comprise first and second poles, respectively 32A, 32B and 34A, 34B, for their electrical connection to an electric power supply source housed in a wristwatch equipped with the needle set. This luminous display 1, 2. This source of electrical power supply may be a rechargeable battery or battery.
    The first pole 32A of the first arrangement 32 of diodes is connected to the power source via the drive shaft 10 of the first needle 1, and the second pole 32B of the first arrangement 32 of diodes is connected to the first pole 34A of the second arrangement 34 of diodes. As for the second pole 34B of the second arrangement 34 of diodes, it is connected to the power source via the drive shaft 24 of the second light-indicator needle 2. For this purpose, the drive axes 10 and 24 first and second illuminated display hands 1 and 2 must be electrically conductive and must be electrically isolated from each other by interposing an insulating layer 38.
    As mentioned above, the first and second annular members 4 and 18 are coated on their upper and lower surface portions with a layer of an electrically conductive material. More precisely, the drive shaft 24 is driven into a metallized hole 22 formed in the second annular element 18. Consequently, the upper surface portion 26 of the second annular element 18 is brought to the same electrical potential as the 24. On the other hand, a continuous trench formed in the lower surface portion of the second annular element 18 and rendered electrically insulating by local removal of the electrically conductive material surrounds the drive shaft 24, so that the lower surface portion is electrically insulated from the drive shaft 24. Similarly, a continuous trench 42 which closes on itself and which is rendered insulating in the same way as the other continuous trench is formed in the upper surface portion 26 the second annular element 18, so as to create an island 44 electrically isolated from the rest of the upper surface portion 26. A through-hole 46 metallized pierced in the thickness of the second annular element 18 is used to electrically connect the island 44 formed in the upper surface portion 26 and the lower surface portion. It will be noted that the trenches are typically obtained by photolithographic etching. Other material removal techniques such as mechanical ablation of the material or by means of a laser beam can however be envisaged.
    Similarly, the drive shaft 10 is driven into a metallized hole 8 formed in the first annular element 4. Consequently, the lower surface portion 14 of the first annular element 4 is brought to the same electrical potential as the drive shaft 10. On the other hand, a continuous trench formed in the upper surface portion 12 of the first annular element 4 and made electrically insulating by local removal of the electrically conductive material surrounds the drive shaft 10, so that the upper surface portion 12 is electrically insulated from the drive shaft 10. Likewise, a continuous trench 50 which closes on itself and which is rendered insulating in the same way as the previous continuous trench is provided in the portion of lower surface 14 of the first annular element 4, so as to create an island 52 electrically isolated from the rest of the portion of lower surface 14. A metallized through-hole 54 pierced in the thickness of the first annular element 4 makes it possible to electrically interconnect the island 52 formed in the lower surface portion 14 and the upper surface portion 12.
    Finally, the lower surface portion 28 of the second annular element 18 is brought into contact with the upper surface portion 12 of the first annular element 4 via an electrically conductive and mechanically elastic contact piece 56 disposed between the first and second needles. 1 and 2 and centered on the drive axis 10. The island 44 formed in the upper surface portion 26 is thus electrically connected to the upper surface portion 12 of the first annular element 4, this portion of upper surface 12 being itself electrically connected to the island 52 formed in the lower surface portion 14 of the first annular element 4.
    The first pole 32A of the first arrangement 32 of diodes is electrically connected to a first terminal of the power source via the drive shaft 10 of the first light indicator needle 1. For this purpose, the first 32A pole is connected to the lower surface portion 14 of the first annular element 4. As for the second pole 32B of the first arrangement 32 of diodes, it is connected to the first pole 34A of the second arrangement 34 of diodes via the contact piece 56 which ensures the electrical continuity between the first and the second luminous display needle 1,2. For this, the second pole 32B of the first arrangement 32 of diodes is connected to the island 52 formed in the lower surface portion 14 of the first annular element 4. Via the metallic via 54 pierced in the thickness of the first element 4, the island 52 is electrically connected to the upper surface portion 12 of the first annular element 4, this upper surface portion 12 being itself connected through the contact piece 56 to the lower surface portion of the second element Annular 18. The lower surface portion of the second annular element 18 is itself connected to the island 44 formed in the upper surface portion 26 of the second annular element 18 via the metallized via 46. Finally, the first pole 34A of the second arrangement 34 of diodes is electrically connected to the island 44 formed in the upper surface portion 26 of the second annular element 1 8. As for the second pole 34B of the second arrangement 34 of diodes, it is connected to the second terminal of the power source via the drive shaft 24. For this, the second pole 34B is electrically connected to the portion of upper surface 26 of the second annular element 18.
    The first and second luminous display hands 1, 2 each consist of a printed circuit board used to form the first and second annular elements 4 and 18, and a light guide respectively 58 and 60. on a portion of the length of each needle to guide and reflect light passing through the light guide. The printed circuit boards are metallized below and above, but not on the wafer. The light guide 58 is fixed under the first annular element 4 to form the first light display needle 1, and the light guide 60 is fixed on the second annular element 18 to form the second light display needle 2. Thus the light guides 58, 60 do not interfere with each other during the rotation of the luminous display hands 1 and 2. The first and second arrangements 32 and 34 of diodes are fixed, for example by gluing, on an input face of the light guides 58 and 60. The light produced by the first and second diode arrangements 32 and 34 is propagated within the light guides 58, 60 by optical coupling.
    From the description that has just been made, several embodiments of the electroluminescent display needle for a portable object, and the set of electroluminescent display needle sets can be designed by those skilled in the art without departing from the scope of the invention defined by the claims.
    权利要求:
    Claims (21)
    [1]
    claims
    1. Electroluminescent display needle (1) for a portable object for providing a watch or measurement indication, the portable object comprising a power source (11) for electrical energy, characterized in that the display needle (1) comprises an arrangement of two diodes (3, 13) mounted head to tail, one connected in parallel with the other and with at least one of the two diodes, which is a light-emitting diode, the two diodes being arranged to be connected to the power source (11) in electrical energy of the portable object.
    [2]
    2. Display needle (1) according to claim 1, characterized in that the two diodes (3, 13) are light emitting diodes.
    [3]
    3. Display needle according to claim 2, characterized in that the light-emitting diodes (3, 13) are organic light emitting diodes (OLED).
    [4]
    4. Display needle (1) according to claim 2, characterized in that a first light-emitting diode (3) is arranged to generate a light in a first direction of polarization of the power source (11) in electrical energy of the portable object, while a second light-emitting diode (13) is arranged to remain off in the first polarization direction, and in that the second light-emitting diode (13) is arranged to generate light in a second direction of polarization opposed to the first polarization direction of the power source (11) in electrical energy of the portable object, while the first light emitting diode (3) is arranged to remain extinguished.
    [5]
    5. Display needle (1) according to claim 4, characterized in that the first light-emitting diode (3) is arranged to generate a light of a first color in the first polarization direction, while the second light-emitting diode ( 13) is arranged to generate light of a second color in the second polarization direction, the first color being different from the second color.
    [6]
    6. Display hand (1) according to claim 2, characterized in that the light-emitting diodes (3, 13) are arranged on one side or on a slice of a light guide (58) constituting part of the length of the display pointer (1) for guiding and reflecting light passing through the light guide (58).
    [7]
    7. Display needle (1) according to claim 6, characterized in that the light-emitting diodes (3, 13) cover all or part of a surface of the needle, as well as their emission zone, being each structured, the structure of one of the diodes may be different from the other diode and displaying a decor or a pattern or logo or text.
    [8]
    8. A display hand (1) according to claim 1, characterized in that a first diode (3) of the arrangement is a light emitting diode, in that a second diode (13) of the arrangement is a conventional diode, in that the light-emitting diode (3) is arranged to generate a light in a first polarization direction of the power source (11) for electrical energy of the portable object, while the second diode (13) is non-conductive, and in that the second diode (13) is arranged to be conductive in a second direction of polarization opposite to the first direction of polarization of the power source (11) in electrical energy of the portable object, while the light-emitting diode (3) remains off.
    [9]
    A set of display hands (1, 2) for a portable object for providing a watch or measuring indication, for which each display pointer is according to one of the preceding claims, characterized in that set comprises at least a first display pointer (1) and a second display pointer (2), in that the first display pointer (1) comprises a first arrangement of two mounted diodes (3, 13) head-to-tail, one connected in parallel with the other and with at least one of the two diodes, which is a light-emitting diode, in that the second hand (2) comprises a second arrangement of two diodes (3 ', 13' ) connected upside down, one connected in parallel with the other and with at least one of the two diodes, which is a light-emitting diode, in that the first and second diode arrangements are connected in series between two terminals of a power source (11) for electric energy ue of the entire portable object.
    [10]
    A display needle set (1, 2) according to claim 9, characterized in that the first diode arrangement comprises a first light-emitting diode (3) and a second light-emitting diode (13), and in that the second diode arrangement comprises a first light-emitting diode (3 ') and a second light-emitting diode (13').
    [11]
    A display needle set (1, 2) according to claim 9, characterized in that the first diode arrangement comprises a first light-emitting diode (3) and a second conventional diode (13), and in that the second diode arrangement comprises a first conventional diode (3 ') and a second light emitting diode (13').
    [12]
    12. A set of display hands (1, 2) according to claim 10, characterized in that the first light-emitting diodes (3, 3 ') of the two arrangements are made conductive to generate light in a first direction of polarization of the power source (11) into electrical energy, while the second light-emitting diodes (13, 13 ') remain off, and in that the second light-emitting diodes (13, 13') of the two arrangements are made conductive for generating light in a second direction of polarization opposite to the first direction of polarization of the power source (11) in electrical energy while the first light emitting diodes (3, 3 ') remain off.
    [13]
    13. A set of display needles (1, 2) according to claim 11, characterized in that the first diodes (3, 3 ') of the two arrangements are made conductive in a first direction of polarization of the source d supply (11) in electrical energy, while the second diodes (13, 13 ') remain non-conductive, in that the second diodes (13, 13') of the two arrangements are made conductive in a second direction of polarization opposite to the first direction of polarization of the power source (11) into electrical energy, while the first diodes (3, 3 ') remain non-conductive, in that the first light-emitting diode (3) of the first arrangement generates light in the first polarization direction, and in that the second light emitting diode (13 ') of the second arrangement generates light in the second polarization direction.
    [14]
    A display needle set (1,2) according to claim 10, characterized in that the first light-emitting diode (3) of the first arrangement generates a light of a first color, in that the second diode light-emitting diode (13) of the first arrangement generates light of a second color, in that the first light-emitting diode (3 ') of the second arrangement generates light of a third color, and in that the second light-emitting diode (13') is electroluminescent. ) of the second arrangement generates light of a fourth color.
    [15]
    A display needle set (1, 2) according to claim 14, characterized in that all first, second, third and fourth colors are different.
    [16]
    A set of display hands (1,2) according to claim 14, characterized in that the first color is identical to the third color, in that the second color is identical to the fourth color, and in what the first and third colors are different from the second and fourth colors.
    [17]
    A display needle set (1,2) according to claim 11, characterized in that the first light-emitting diode (3) of the first arrangement generates a light of a first color, and that the second The light emitting diode (13 ') of the second arrangement generates a second or different color light of the first color.
    [18]
    18. A set of display hands (1,2) according to claim 10, characterized in that according to the switching variation of the first and second polarization directions of the power source (11) into electrical energy, which is controlled by a control unit (21) of the assembly connected to the power source (11) with electrical energy, the two light-emitting diodes (3, 13) of the first diode arrangement and the two light-emitting diodes (3). ', 13') of the second arrangement appear illuminated at the same time continuously for a human eye.
    [19]
    19. A set of display hands (1,2) according to claim 11, characterized in that according to the switching variation of the first and second polarization directions of the power source (11) into electrical energy, which is controlled by a control unit (21) of the assembly connected to the power source (11) with electrical energy, the first light-emitting diode (3) of the first diode arrangement and the second light-emitting diode (13 ') the second arrangement appear illuminated at the same time continuously for a human eye.
    [20]
    20. A set of display hands (1, 2) according to claim 10, characterized in that one or two light-emitting diodes of at least one diode arrangement are arranged to emit flashing light or a flashing diode. and the other light-emitting diode appearing continuous.
    [21]
    21. A set of display hands (1, 2) according to claim 20, characterized in that the light emitting diodes of one of the needles appear illuminated continuously, and in that the light emitting diodes of the other hand are arranged to emit a flashing light to indicate a function of the portable object or a setting mode.
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    同族专利:
    公开号 | 公开日
    CH714465B1|2021-07-15|
    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
    CH01557/17A|CH714465B1|2017-12-19|2017-12-19|Electroluminescent needle, and electroluminescent needle set assembly.|CH01557/17A| CH714465B1|2017-12-19|2017-12-19|Electroluminescent needle, and electroluminescent needle set assembly.|
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