EP3502792A1 - Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern - Google Patents

Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern Download PDF

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Publication number
EP3502792A1
EP3502792A1 EP17208644.9A EP17208644A EP3502792A1 EP 3502792 A1 EP3502792 A1 EP 3502792A1 EP 17208644 A EP17208644 A EP 17208644A EP 3502792 A1 EP3502792 A1 EP 3502792A1
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EP
European Patent Office
Prior art keywords
light
diode
emitting diode
diodes
arrangement
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.)
Withdrawn
Application number
EP17208644.9A
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English (en)
French (fr)
Inventor
Michel Sagardoyburu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swatch Group Research and Development SA
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Swatch Group Research and Development SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP17208644.9A priority Critical patent/EP3502792A1/de
Publication of EP3502792A1 publication Critical patent/EP3502792A1/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G04B19/305—Illumination of dials or hands the hands carrying the light source
    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B11/00—Indicating elements; Illumination thereof
    • G12B11/04—Pointers; Setting-mechanisms therefor

Definitions

  • 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 needle sets for a timepiece, such as a wristwatch, or for a portable measuring instrument.
  • 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.
  • 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.
  • the hands of the watch can also play a decorative role by contributing largely to the aesthetic appearance of the watch they equip.
  • 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.
  • phosphorescence light emission is limited in time.
  • one or more clock-hour display hands with at least one discrete light source, such as a light-emitting diode, powered by a source of electrical energy supply, which can include a battery in the watch.
  • a source of electrical energy supply which can include a battery in the watch.
  • the figure 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 d 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.
  • the figure 2 represents an electrical circuit of an electroluminescent display needle set 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 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 source of power. electric power supply 11.
  • This electric power supply source 11 may be composed of a battery or a means for storing charges from a source of supplementary 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.
  • the patent EP 2 950 168 B1 discloses a set of luminous display hands for a watch in which is housed a source of 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 with the source of electrical energy supply by 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.
  • the object of the invention is therefore to provide an electroluminescent display needle for a portable object, such as a timepiece, or for a measuring instrument that overcomes the aforementioned drawbacks of the state of the art by means of an arrangement of two diodes on the needle, which are easily connected to an electrical power source in the portable object for generating light in at least one polarization direction.
  • the invention relates to an electroluminescent display needle, which comprises the features mentioned in the independent claim 1.
  • 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 connected to each other. parallel to 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.
  • the two diodes of the arrangement are electroluminescent diodes.
  • 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.
  • the second light-emitting diode 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.
  • the arrangement comprises a first light-emitting diode and a second simple diode
  • only the first light-emitting diode is illuminated according to the first polarization direction 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.
  • the diodes are light emitting diodes (LEDs) or organic light emitting diodes (OLEDs).
  • 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.
  • 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.
  • the invention also relates to a set of electroluminescent display needle sets, which comprises the features mentioned in the independent claim 9.
  • An advantage of the electroluminescent display needle set is 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 two light-emitting diodes.
  • the two diode arrangements are serially connected to one another and connected by conductive tracks to the power source.
  • the two diodes of the two arrangements are electroluminescent diodes.
  • 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.
  • 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.
  • each arrangement comprises a first light-emitting diode and a second simple diode
  • only the first light-emitting diode is illuminated according to the first direction of polarization of the power supply source. electric.
  • 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.
  • 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, while for the second arrangement, the first light-emitting diode remains off with the second single-conductor diode.
  • the opposite occurs in the second polarization direction opposite to the first polarization direction.
  • the two light-emitting diodes are illuminated at the same time by a supply source of alternating or pulsed electrical energy if the variation of voltage or current is fast enough for the eye to perceive a light. continuous light.
  • 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.
  • the figure 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 comprises a source of power supply.
  • 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 one 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.
  • GaAs gallium arsenide
  • GaN gallium nitride
  • GaP gallium phosphide
  • ZnSe zinc selenide
  • OLEDs organic light emission diodes
  • 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.
  • the light-emitting diodes 3, 13 may also be QDLED or QLED (Quantum Dot LED) or Pero-LED (LED based on Perovskite material) diodes.
  • the first and second light emitting diodes 3, 13 each comprise a first anode defined connection terminal and a second cathode defined connection terminal.
  • 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.
  • the light-emitting diode 3 or 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 energized 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 supply source 11 may be arranged to reverse the polarization direction 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).
  • the Figures 4a and 4b represent 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.
  • 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 direction of polarization. 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 electrical power supply source 11 of the assembly further comprises a rechargeable battery or battery, for example, an integrated switching unit.
  • a rechargeable battery or battery for example, an integrated switching unit.
  • a variable bias current to light emitting diode arrangements 3, 13, 3 ', 13' in a first polarization direction or a second polarization direction.
  • the two light emitting diodes are illuminated at the same time by the source of alternating or pulsed electrical energy supply. If the change in 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.
  • 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.
  • each light emitting diode 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.
  • 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 with a size covering all or part of a surface of each needle with the emission area 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.
  • first light emitting diode 3 of the first diode arrangement generating light of a first color
  • second light emitting diode 13 of the first diode arrangement generating light of a second color different from the first color.
  • the second arrangement of diodes including the 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.
  • the Figures 5a and 5b represent as for the Figures 4a and 4b a set of electroluminescent display needles 1, 2 which comprise two diode arrangements.
  • the second diode 13 of the first diode arrangement is only a conventional diode 13
  • 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.
  • 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.
  • figure 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.
  • the first needle 1 is illuminated, while the second needle 2 remains off.
  • 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.
  • 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 indicating end of the needle.
  • a needle set assembly includes first and second electroluminescent display needles 1 and 2.
  • the first light display needle 1 is formed of a first annular member 4 extended by a portion that extends 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.
  • 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 1.
  • the light display second annular element 18 is provided with an upper surface portion 26 directed towards an observer, and a lower surface portion 28 opposite the upper surface portion 26.
  • the upper surface portions 26 and lower 28 of the second annular element 18 are interconnected all along their perimeter by a lateral surface 30.
  • the second annular element 18 is also coated with a protective layer. an electrically conductive material on its upper and lower surface portions 28 and in the hole 22 in which the drive shaft 24 is engaged.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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 hole trave Metallic element 46 pierced in the thickness of the second annular element 18 makes it possible to electrically connect the island 44 formed in the upper surface portion 26 and the lower surface portion.
  • 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.
  • 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 axis
  • 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 portion of the upper surface 12 is electrically isolated from the drive shaft 10.
  • a continuous trench 50 which closes on itself and which is rendered insulating in the same way as the previous continuous trench is formed in the surface portion 14 of the first annular element 4, so as to create an island 52 electrically isolated from the rest of the lower surface portion 14.
  • a through hole 54 metallized pierced in the thickness of the first annular element 4 allows to electrically connect them island 52 formed in the lower surface portion 14 and the upper surface portion 12.
  • 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 arranged between the first and second display hands. 1 and 2 and centered on the drive axis 10.
  • the island 44 formed in the upper surface portion 26 is electrically connected to the upper surface portion 12 of the first annular element 4, this upper surface portion 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 luminous display needle 1.
  • the first pole 32A is connected to the lower surface portion 14 of the first annular element 4.
  • 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 provides electrical continuity between the first and the second light display needle 1, 2.
  • 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.
  • the island 52 is electrically connected to the upper surface portion 12 of the first annular element 4, this upper surface portion 12 itself being connected through the contact piece 56 to the portion lower surface portion of the second annular element 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 metallic via 46
  • the first pole 34A of the second diode arrangement 34 is electrically connected to the island 44 formed in the upper surface portion 26 of the second annular element 18.
  • the second pole 34B of the second diode arrangement 34 it is connected at the second terminal of the power source via the drive shaft 24.
  • the second pole 34B is electrically connected to the surface portion sup 26 of the second annular element 18.
  • the first and second illuminated 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 part 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.
  • 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.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Measuring Devices (AREA)
EP17208644.9A 2017-12-19 2017-12-19 Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern Withdrawn EP3502792A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17208644.9A EP3502792A1 (de) 2017-12-19 2017-12-19 Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17208644.9A EP3502792A1 (de) 2017-12-19 2017-12-19 Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern

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EP3502792A1 true EP3502792A1 (de) 2019-06-26

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EP17208644.9A Withdrawn EP3502792A1 (de) 2017-12-19 2017-12-19 Elektrolumineszenz-zeiger und set mit elektrolumineszenzzeigern

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022122199A1 (fr) * 2020-12-11 2022-06-16 The Swatch Group Research And Development Ltd Procédé de fabrication d'aiguilles luminescentes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02298818A (ja) * 1989-02-07 1990-12-11 Nippondenso Co Ltd 発光指針付き計器
DE4129057A1 (de) * 1991-09-02 1993-03-04 Vdo Schindling Zeigerinstrument
JPH0527624U (ja) * 1991-09-20 1993-04-09 スタンレー電気株式会社 計器用指針
WO1997028424A1 (en) 1996-01-30 1997-08-07 Durel Corporation Analog display having electroluminescent pointer
US5751662A (en) * 1997-01-28 1998-05-12 Shaw; Sen-Yen Illuminating timepiece
EP2950168B1 (de) 2014-05-27 2016-10-12 The Swatch Group Research and Development Ltd. Set aus Leuchtzeigern zum Anzeigen für tragbaren Gegenstand wie Armbanduhr oder Messinstrument

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02298818A (ja) * 1989-02-07 1990-12-11 Nippondenso Co Ltd 発光指針付き計器
DE4129057A1 (de) * 1991-09-02 1993-03-04 Vdo Schindling Zeigerinstrument
JPH0527624U (ja) * 1991-09-20 1993-04-09 スタンレー電気株式会社 計器用指針
WO1997028424A1 (en) 1996-01-30 1997-08-07 Durel Corporation Analog display having electroluminescent pointer
US5751662A (en) * 1997-01-28 1998-05-12 Shaw; Sen-Yen Illuminating timepiece
EP2950168B1 (de) 2014-05-27 2016-10-12 The Swatch Group Research and Development Ltd. Set aus Leuchtzeigern zum Anzeigen für tragbaren Gegenstand wie Armbanduhr oder Messinstrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022122199A1 (fr) * 2020-12-11 2022-06-16 The Swatch Group Research And Development Ltd Procédé de fabrication d'aiguilles luminescentes

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