EP0195384A1 - Speiseschaltung für Lichterzeuger mit variablen Farben - Google Patents

Speiseschaltung für Lichterzeuger mit variablen Farben Download PDF

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Publication number
EP0195384A1
EP0195384A1 EP86103471A EP86103471A EP0195384A1 EP 0195384 A1 EP0195384 A1 EP 0195384A1 EP 86103471 A EP86103471 A EP 86103471A EP 86103471 A EP86103471 A EP 86103471A EP 0195384 A1 EP0195384 A1 EP 0195384A1
Authority
EP
European Patent Office
Prior art keywords
signal
counter
light sources
outputs
output
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.)
Granted
Application number
EP86103471A
Other languages
English (en)
French (fr)
Other versions
EP0195384B1 (de
Inventor
Werner Schneiter
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.)
Omega Electronics SA
Original Assignee
Omega Electronics 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 Omega Electronics SA filed Critical Omega Electronics SA
Publication of EP0195384A1 publication Critical patent/EP0195384A1/de
Application granted granted Critical
Publication of EP0195384B1 publication Critical patent/EP0195384B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/09—Circuit arrangements or apparatus for operating incandescent light sources in which the lamp is fed by pulses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0052—Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor
    • F21V33/0056—Audio equipment, e.g. music instruments, radios or speakers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/806—Ornamental or decorative
    • Y10S362/811—Psychedelic lighting

Definitions

  • the present invention relates to a device for supplying a light emitting element equipped with at least two light sources each radiating a different fundamental color, the tint emitted by said element changing color as a function of variations in a analog electrical signal supplied by a physical phenomenon sensor, in particular a microphone.
  • Document FR-A-2 186 624 proposes a set of three light sources of different colors combined with a reflector ensuring the mixing of these colors.
  • a strip of paper with three tracks is used, the transparency of which varies according to the illumination to be provided at each instant by each light source. The transparency is measured by photoelectric cells so that when the strip passes, the resulting shade emitted by the reflector varies.
  • Document US Pat. No. 3,564,332 describes a system very similar to that which has just been mentioned, where the color change control element is in the form of a continuously rotating disc.
  • the present invention is characterized in that the device for supplying light sources comprises a converter capable of converting the analog signal supplied by a sensor, in particular a microphone, into a series of electrical pulses whose rising or falling edges follow one another at a rate which is dependent on the variations of said analog signal and a counter using the rising or falling edges of each of said pulses to provide at its output a coded signal whose state changes each time one of said rising or falling edges is applied to said counter, each of said states of said coded signal determining a predetermined state of excitation of said light sources.
  • an important aim which the present invention proposes to achieve is to make the ignition of light sources depend not on the frequency or on the level of an analog signal, such as that coming from a microphone for example, but on a coded signal which changes according to the variations of this signal. Each change of state of the coded signal corresponds to a different excitation of the light sources and this according to a determined sequence which is repeated.
  • Another object which the invention proposes to achieve is to implement a code converter whose role consists, for a determined sequence, in increasing the number of possible states that the coded signal can take in this sequence.
  • Figure 1 shows a light emitting element equipped with three light sources referenced B (blue), G (green) and R (red).
  • the color emitted by this element will change color to function of variations in an analog electrical signal supplied by a physical phenomenon sensor, here a microphone 1.
  • a microphone 1 As the voltage collected across the microphone is low, it is amplified by amplifier 2 at the output of which there is a signal 8 of sufficient amplitude to attack the device according to the invention.
  • This device firstly comprises a converter 3 which transforms the analog signal 8 into a series of pulses 9 whose rising sides 6 and falling 7 follow one another at a rate which is dependent on variations in the analog signal 8.
  • the power supply device also comprises a counter 4 which uses the rising or falling edges (here preferably the rising edges 6) of each of said pulses 9 to provide at its output a coded signal 10 whose state changes each time it is applied at the counter 4 one of the rising or falling sides of the pulses 9.
  • a coded signal 10 whose state changes each time it is applied at the counter 4 one of the rising or falling sides of the pulses 9.
  • Each of the successive states occurring at the output of the counter 4 determines a determined state of excitation of the light sources.
  • the state 1 0 1 of the signal 10 excites the lamps B and R while the lamp G remains off. If B and R radiate a blue and red color respectively, the tint of the light emitting element 5 will be purple.
  • FIG. 2 is a detailed diagram of the supply device, the principle diagram of which has been explained above and according to a first embodiment. Here we find the different elements 1, 2, 3, 4 and 5 exposed in Figure 1 and which will now be explained in detail.
  • the physical phenomenon sensor 1 makes it possible to correspond to the amplitude of a physical quantity a determined shade.
  • the quantity in question is an acoustic or musical signal picked up by a microphone. It could however be another quantity, for example the angle of rotation of an axis, the displacement of a control handle, a temperature, etc.
  • the microphone used is preferably of the electret type with its own preamplifier.
  • the electrical signals from the microphone 1 are then applied to an amplifier 2 which comprises two operational amplifiers 12 and 13 connected in cascade.
  • a potentiometer 14 makes it possible to adjust the gain of amplifier 2.
  • Block 2 is supplied with DC voltage, like blocks 1, 3 and 4 moreover, by a source not shown and by means of the lines marked +.
  • An analog signal having the appearance of that referenced 8 in FIG. 1 is collected at the output 15 of the amplifier 2.
  • the signal present on line 15 is then applied to converter 3 whose purpose is to convert said signal into a series of electrical pulses appearing on the output line 24 of said converter.
  • this conversion is done as follows:
  • the analog signal is rid of its negative half-wave.
  • the remaining positive half-cycle is shown under reference 17 in FIG. 3a.
  • the signal thus rectified is then applied to an integrator formed by the capacitor 18 and the resistor 19, which results in the formation, at point 20, of a new signal which is the envelope of the rectified analog signal as can be see at 21 in Figure 3a.
  • the envelope signal 21 is applied to an operational amplifier 22 operating as a comparator.
  • the signal 21 is compared in this comparator to a voltage threshold which is referenced 23 in FIG.
  • the pulses of FIG. 3b are then applied to the counter 4 on its input Cl (clock) after having passed through the inverter 25.
  • the counter 4 changes state each time a rising edge is applied to its input Cl while it is insensitive to the falling edge of the control pulses.
  • On the outputs Q 1 , Q 2 and Q 3 of the counter there are the successive situations given by the following table which also gives the sequence of lighting of the light sources R, G, B as and when the flanks appear amounts at the Cl input of the counter:
  • FIG. 3a shows that the choice value of the voltage threshold 23 is critical. If the musical level is very high, it will remain above this threshold and there will be little or no change in color. Conversely, in the case of a low musical level, the envelope signal could be confined below the threshold 23.
  • an amplifier 2 could be used which would be equipped with automatic gain control (AGC). instead of the manual control provided by element 14.
  • AGC automatic gain control
  • FIG. 4 represents a modified converter 3, all the other blocks being similar to those discussed in connection of Figure 2.
  • the converter 3 of Figure 4 includes a differentiator disposed between the integrator 18, 19 and the comparator 22.
  • This differentiator includes the capacitor 33 and the two resistors 34 and 35.
  • the envelope signal present at point 20 is applied to capacitor 33 of the differentiator.
  • the aim of this system is first of all to bring the envelope signal to center around a zero level and then, if the value of the capacitor 33 is chosen to be low enough with respect to the resistors 34 and 35, to cause the comparator on the slope of the envelope signal.
  • FIG. 5a shows the appearance of the differentiated signal such that it appears after the capacitor 33 and as it is applied to the comparator 22.
  • the differentiated signal is compared to the threshold voltage 36, which produces at the output of the comparator the series of pulses which appears in FIG. 5c.
  • the rising edges 6 of the signal change the state of the counter 4, which produces a sequence of tones consecutive to the various successive states taken by the outputs Q 1 Q 2 Q 3 of the counter 4.
  • Figure 6 is a partial diagram of the supply device according to a third embodiment.
  • the outputs Q 1 , Q 2 and Q 3 of the counter 4 are connected to a NAND gate 38 and, on the other hand, the same three outputs are connected to the switches 28, 27 and 26 by through doors 39, 40 and 41 respectively.
  • the output of gate 38 is connected to the LOAD input of the counter, that the input P 1 is connected to the most of the power supply while the inputs P 2 and P 3 are connected to ground.
  • the purpose of this combination is to prevent the state 0 0 0 at the output of the counter.
  • a signal 0 arises at the output of the said door, which has the consequence of preselecting the counter according to the state imposed on the inputs P 1 , P 2 and P 3 when the next rising edge Cl arrives.
  • the preselection will be made on the value 100.
  • the state 0 0 0 which is between state 1 1 1 and 1 0 0 (as we can see on the table given above) is deleted.
  • the purpose of this programming is to avoid a black state in the sequence which is then reduced to 7 different states.
  • door means are arranged between the outputs Q 1 , Q 2 and Q 3 of the meter and the light sources.
  • the purpose of this arrangement is to prevent for a predetermined period of time the application of the coded signal to the light sources during each change of state of this signal. It has indeed been noticed that a very short pause (black pause) between the change from one color to another gives a more marked impression of this change than if the change was made without a break.
  • the gates 39, 40 and 41 receive on their first inputs the signals Q 1 , Q 2 and Q 3 respectively and on their second inputs put in parallel a signal 42 which is the differentiation of the falling edge of the control pulse arriving by the line 24.
  • the differentiation is carried out by the RC constituted by the capacitor 43 and the resistor 44.
  • the elements 43 and 44 will be dimensioned so as to preferably obtain a pause before ignition on the order of 50 to 100 ms.
  • FIG. 7 is a partial diagram of the supply device according to a fourth embodiment according to the invention.
  • the code converter 45 used is of the programmable memory type generally called PROM.
  • the code converter can be programmed at will and an example has just been given in the table above. We note in particular that the state 0 0 0 0 no longer needs to be deleted since it corresponds in the example given to a color, in particular white (W) result of the simultaneous excitation of the three RGB colors .
  • the arrangement taken in FIG. 6 to prevent for a short period of time the application of the coded signal to the RGB light sources is also implemented in the embodiment of FIG. 7.
  • the way of performing this function is however simplified by the fact that the PROM 45 converter has a single CE input. After having been differentiated by the capacitor 47 and the resistor 48, then reversed by the gate 49, the falling edge of the pulses present on the line 24 controls the input CE of the memory 45.
  • the RGB light sources shown in the various figures may be of the incandescent type, each having a different colored bulb.
  • the supply of these lamps is made by a DC voltage source of value + U if the switches 26, 27 and 28 are simple transistors. If this voltage were to be an alternative source, a diac-triac system which is also well known in the state of the art will be used as the semiconductor switch.
  • These light sources could also be fluorescent tubes, the internal wall of each of them being covered with a different phosphor.
  • the strike voltage of the tubes is repeated at the frequency of the supply network, said strike voltage being followed by a continuous arc holding voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Auxiliary Devices For Music (AREA)
EP86103471A 1985-03-18 1986-03-14 Speiseschaltung für Lichterzeuger mit variablen Farben Expired EP0195384B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8504085A FR2579056B1 (fr) 1985-03-18 1985-03-18 Dispositif d'alimentation d'un element emetteur de lumiere a couleurs changeantes
FR8504085 1985-03-18

Publications (2)

Publication Number Publication Date
EP0195384A1 true EP0195384A1 (de) 1986-09-24
EP0195384B1 EP0195384B1 (de) 1988-11-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103471A Expired EP0195384B1 (de) 1985-03-18 1986-03-14 Speiseschaltung für Lichterzeuger mit variablen Farben

Country Status (8)

Country Link
US (1) US4668895A (de)
EP (1) EP0195384B1 (de)
JP (1) JPS61218093A (de)
AU (1) AU581587B2 (de)
CA (1) CA1248460A (de)
DE (1) DE3661155D1 (de)
FR (1) FR2579056B1 (de)
SG (1) SG90391G (de)

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ITMI20110051A1 (it) * 2011-01-20 2012-07-21 Orlando Coruzzi Struttura decorativa composita, particolarmente per alberi di natale e simili applicazioni.

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CA1248460A (en) 1989-01-10
FR2579056B1 (fr) 1987-04-10
FR2579056A1 (fr) 1986-09-19
EP0195384B1 (de) 1988-11-09
JPS61218093A (ja) 1986-09-27
US4668895A (en) 1987-05-26
SG90391G (en) 1991-11-22
AU581587B2 (en) 1989-02-23
JPH0546678B2 (de) 1993-07-14
DE3661155D1 (en) 1988-12-15
AU5485686A (en) 1986-09-25

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