EP1267372A1 - Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen - Google Patents

Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen Download PDF

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Publication number
EP1267372A1
EP1267372A1 EP01202316A EP01202316A EP1267372A1 EP 1267372 A1 EP1267372 A1 EP 1267372A1 EP 01202316 A EP01202316 A EP 01202316A EP 01202316 A EP01202316 A EP 01202316A EP 1267372 A1 EP1267372 A1 EP 1267372A1
Authority
EP
European Patent Office
Prior art keywords
lighting units
circuit
light
leds
led
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Withdrawn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
EP01202316A
Other languages
English (en)
French (fr)
Inventor
Fiorino Falchi
Remo Belluzzo
Davide Nazzari
Danilo Bau'
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.)
GE Power Controls Italia SpA
Original Assignee
GE Power Controls Italia SpA
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 GE Power Controls Italia SpA filed Critical GE Power Controls Italia SpA
Priority to EP01202316A priority Critical patent/EP1267372A1/de
Publication of EP1267372A1 publication Critical patent/EP1267372A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/023—Light-emitting indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface

Definitions

  • the present invention refers to lighting units using light emitting diodes to be used on signalling and control devices for electric control boards and the like.
  • LED the light emitting diodes which are very popular and successful, owing to their versatility, strength and low power consumption. From what above, it has been obvious that said diodes were used as light sources for lighting signalling devices, such as pilot lights and lighted push-buttons.
  • signalling device provided with a LED is disclosed in EP-A-0 869 522, using a LED to produce light inside the signalling device, being the light emitting diode or LED arranged for emitting light, both transversely and substantially perpendicularly, with respect to a longitudinal axis of the lighting device and utilises multiple reflection on internal translucent surfaces of a recess, substantially shaped as a frustum of cone, for emitting light in the most the possible uniform manner from a front refractive gem of the signalling device.
  • the applicant of the above mentioned publication thought to insert in an embodiment of the signalling device a prismatic member of translucent material, arranged between the emitting or active area of the LED and the recess, shaped as a frustum of cone, having translucent surfaces, operating as a light guide to convey the light emitted by the LED to the surfaces of the recess.
  • the obtained result allows to better focus the emitted light in the recess and then direct it to the front refractive gem, but the result is not completely satisfying as regards the lighting uniformity of the gem.
  • At least one LED mounted on a supply circuit board, arranged to emit light according to a range of directions having symmetry axis parallel to the axis of the sleeve, housing the lighting unit, and provided at the external end with a refractive gem lighted by the at least one LED.
  • two LEDs are used, mounted on the supply circuit board, also arranged to emit light according to two direction ranges having symmetry axes parallel to the axis of the sleeve housing the lighting units, and also provided at the external end with a refractive gem lighted by the light emitted by the two LEDs.
  • the electric circuit embodied on the circuit board allows to supply the at least one LED in order to continuously emit light.
  • the circuit supplies the two LEDs for continuously emitting light.
  • the circuit embodied on the circuit board allows to supply the at least one LED in order to intermittently emit light.
  • the circuit supplies the two LEDs for intermittently emitting light.
  • an integrated lighting unit 10 comprises a board 12 supporting a circuit 14 for supplying at least one LED 16.
  • the supply circuit is housed in the support board 12, which is inserted in a modular block 18, provided with an upper seat 20 housing a transparent case 22 top closed by a dome 24, also transparent.
  • the lower portion of the circuit board 12 ends with an enlargement 26 housing two conducting pads 28 and 30 connected to two conducting brackets 32 and 34 provided with screws 36 and 38 to embody two connecting terminals 40 and 42, having equal shape.
  • the circuit board 12 bears mounted on its upper end a LED 16 which, when lit, projects a conical light beam 44, having about 120° aperture angle, to a sleeve 46 and a front refractive gem 48, somehow inserted in the sleeve 46.
  • the LED 16 emits light mainly into a beam 44, having 120° aperture angle, to reach the circle 50, depicted in Figure 3 as the basis of the conic beam 44.
  • some other light is emitted, according to a marginal beam having 180° aperture angle, being the last light reflected in diffused manner by the sleeve 46, which is made of light diffusing material, such as metal or clear plastic material, broadening a light spot on the gem 48, so producing a substantially even lighting thereof.
  • circuit board 12 bears side mounted at its upper end two LEDs 16a and 16b which, when lit, project two conic light beams 44a and 44b, having about 120° aperture angle, to a sleeve 46 and a front refractive gem 48 somehow inserted, in some well known way, on the sleeve 46.
  • the LEDs 16a and 16b emit light mainly into two beams 44a and 44b, having 120° aperture angle, to reach respective circles 50a and 50b, depicted in Figure 5 as the bases of the conic beams 44a and 44b.
  • some other light is emitted, according to marginal beams having 180° aperture angle, being the last light reflected in diffused manner by the sleeve 46, which is made of light diffusing material, such as metal or clear plastic material, broadening the light spot on the gem 48, so producing a substantially even lighting thereof.
  • FIG. 6 it is seen an electric diagram 60 to supply the low voltage (24 volts either AC or DC with indifferent polarity) of a control board to the LEDs 16a and 16b, assuring continuous light emission from the signalling device.
  • the two terminals 40 and 42 are connected, through a protecting resistor 62, to a rectifying bridge 64 provided with terminals (+) and (-) connected to a Zener diode 66 stabilising a DC supply voltage provided to the two LEDs 16a and 16b through a protecting resistor 68.
  • a further resistor 70 to absorb overcurrents and a levelling capacitor 72 allow the LEDs 16a and 16b to emit light regularly and evenly without danger of failures.
  • an electric diagram 80 to supply the low voltage (24 volts either AC or DC with indifferent polarity) of a control board to the LEDs 16a and 16b, assuring intermittent light emission from the signalling device (flashing light).
  • the two terminals 40 and 42 are connected, through a protecting resistor 62, to a rectifying bridge 64 to obtain the DC stabilised by the Zener diode 66 and levelled by the levelling capacitor 72.
  • the two LEDs 16a and 16b are connected to an astable multivibrator circuit 82 consisting of a first transistor 82a and a second transistor 82b anyone provided with load collector resistors 84a and 84b, respectively, base resistor 86a and 86b, respectively, and coupling capacitors 88a and 88b determining the operating frequency of the astable multivibrator circuit 82.
  • the resistance values of the resistors 86a and 86b and the capacitance values of the capacitors 88a and 88b are selected to have a flashing frequency of about two flashes a second, at most.
  • the method to determine the above mentioned resistance and capacitance values are well known to people skilled in this art and cannot be matter of the present invention.
  • an electric diagram 90 to continuously supply from a main electric system (having either 120 or 220 Volts AC voltage) the LEDs 16a and 16b, assuring continuous light emission from the signalling device.
  • the two terminals 40 and 42 are connected, through a protecting resistor 62 and a capacitor 92, acting as reactive (not dissipating) voltage reductor, provided with a resistor 94 for protection against overvoltages, to the usual rectifier bridge 64 producing unidirectional voltage, stabilised by the Zener diode 66, which through a circuit, however identical to that of Figure 6, feeds the two LEDs 16a and 16b which provide to continuously emit light for the time they are crossed by electric current.
  • the two terminals 40 and 42 are connected, through a protecting resistor 62 and a capacitor 92, acting as reactive (not dissipating) voltage reductor, provided with a resistor 94 for protection against overvoltages, to the usual rectifier bridge 64 producing unidirectional voltage, stabilised by the Zener diode 66, which through a circuit, however identical to that of Figure 7, feeds the two LEDs 16a and 16b which provide to intermittently emit light.
  • the LEDs can be more than two in number (for example three) to assure more uniformity in light emission.
  • circuits providing either continuous or intermittent supply of the LEDs can be different from the depicted ones, provided that they assure the same operations.
EP01202316A 2001-06-15 2001-06-15 Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen Withdrawn EP1267372A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01202316A EP1267372A1 (de) 2001-06-15 2001-06-15 Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01202316A EP1267372A1 (de) 2001-06-15 2001-06-15 Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen

Publications (1)

Publication Number Publication Date
EP1267372A1 true EP1267372A1 (de) 2002-12-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202316A Withdrawn EP1267372A1 (de) 2001-06-15 2001-06-15 Integrierte Beleuchtungseinheiten zur Befestigung an Signal- und Steuervorrichtungen für elektrische Steuerpults und dergleichen

Country Status (1)

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EP (1) EP1267372A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2385988A (en) * 2002-03-02 2003-09-03 Hager Engineering Ltd Illuminated switch
WO2022255936A1 (en) * 2021-06-02 2022-12-08 Schneider Electric Asia Pte Ltd A modular accessory device for a transmitter device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851623A (en) * 1984-12-05 1989-07-25 Omron Tateisi Electronics Co. Push-button switch
US4885443A (en) * 1988-11-29 1989-12-05 Tokheim Corporation Sealed backlit switch assembly
US5391848A (en) * 1993-03-12 1995-02-21 Inventio Ag Push button switch illuminated by light emitting diodes for use with elevators
US5636729A (en) * 1995-06-12 1997-06-10 Wiciel; Richard Piezo switch
EP0789229A2 (de) * 1996-02-08 1997-08-13 Eaton Corporation Anzeigevorrichtung
EP1037223A2 (de) * 1999-03-10 2000-09-20 Alan D. Jorczak Steuerungsschaltanordnung
DE19936195C1 (de) * 1999-07-31 2000-12-07 Eaton Corp Elektrischer Drucktastenschalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4851623A (en) * 1984-12-05 1989-07-25 Omron Tateisi Electronics Co. Push-button switch
US4885443A (en) * 1988-11-29 1989-12-05 Tokheim Corporation Sealed backlit switch assembly
US5391848A (en) * 1993-03-12 1995-02-21 Inventio Ag Push button switch illuminated by light emitting diodes for use with elevators
US5636729A (en) * 1995-06-12 1997-06-10 Wiciel; Richard Piezo switch
EP0789229A2 (de) * 1996-02-08 1997-08-13 Eaton Corporation Anzeigevorrichtung
EP1037223A2 (de) * 1999-03-10 2000-09-20 Alan D. Jorczak Steuerungsschaltanordnung
DE19936195C1 (de) * 1999-07-31 2000-12-07 Eaton Corp Elektrischer Drucktastenschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2385988A (en) * 2002-03-02 2003-09-03 Hager Engineering Ltd Illuminated switch
GB2385988B (en) * 2002-03-02 2005-06-01 Hager Engineering Ltd Illuminated rocker switch
WO2022255936A1 (en) * 2021-06-02 2022-12-08 Schneider Electric Asia Pte Ltd A modular accessory device for a transmitter device

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