Light modulation device and system

• US 8,579,795 B2
• Filed: 04/28/2008
• Issued: 11/12/2013
• Est. Priority Date: 04/30/2007
• Status: Active Grant

• Current Assignee: Alain Anadi Martel
• Original Assignee: Alain Anadi Martel
• Inventors: Martel, Alain Anadi
• Primary Examiner(s): Matthews, Christine
• Assistant Examiner(s): Reddy, Sunita
• Application Number:
  US12/598,296
• Publication Number:
  US 20100130812A1
• Time in Patent Office: 2,024 Days
• Field of Search: 600/27, 600/26, 362/811, 362/257, 362/269, 362/801, 307/10.8, 347/135, 345/690
• US Class Current: 600/27
• CPC Class Codes: A61M 2021/0044 by the sight sense
• CPC Class Codes: A61M 21/02 for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia for massage A61H; electrotherapy A61N, e.g. applying alternating or intermittent electric currents for producing anaesthesia A61N1/36021
• CPC Class Codes: A61N 2005/0648 the light being directed to the eyes
• CPC Class Codes: A61N 2005/0651 Diodes
• CPC Class Codes: A61N 5/0618 Psychological treatment
• CPC Class Codes: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto
• CPC Class Codes: G03B 21/006 using LCD's

Abstract

Light modulation devices are provided. At least one Low Frequency Oscillator (LFO) is used to create an oscillating signal used to drive an intensity parameter, a color parameter or both in a light modulator. The oscillating signal may be mixed with a base signal. The modulated signal driving either of the intensity or color parameters may be simple or complex. Systems having a plurality of light projection devices, each associated with a corresponding light modulation device, are also provided. Such Light modulation systems may be used for a variety of applications.

Claims

1. A light modulation device for generating modulated color component output signals adapted for use by a light projection device for modulating light projected thereby, the light modulation device comprising:

an electronic circuit, comprising;

a light modulator generating said color component output signals according to an intensity parameter for controlling a brightness of said light and a color parameter for controlling a hue of said light, the color parameter being controlled by a modulated color signal; and

a color modulation generator for generating the modulated color signal, the color modulation generator being in communication with the light modulator for providing the modulated color signal thereto, said color modulation generator having;

a main Low Frequency Oscillator (LFO) generating an oscillating signal; and

a color mixer performing a summation of said oscillating signal of the main LFO with a base color signal, thereby providing said modulated color signal, said color mixer comprising a modulo summation element such that;

C_combined(t)=(C_b(t)+C_lfo(t))modulo C_range;

wherein t represents time, C_combined(t) is the modulated color signal, C_b(t) is the base color signal, C_lfo(t) is the oscillating signal and C_range is a maximum authorized value for C_b(t) and C_lfo(t).

2. The light modulation device according to claim 1, wherein the intensity parameter is controlled by a modulated intensity signal, said light modulation device further comprising an intensity modulation generator for generating the modulated intensity signal, the intensity modulation generator being in communication with the light modulator for providing the modulated intensity signal thereto, said intensity modulation generator having:

a main Low Frequency Oscillator (LFO) generating an oscillating signal; and

an intensity mixer multiplying_said oscillating signal of the main LFO with a base intensity signal, thereby providing said modulated intensity signal.

3. The light modulation device according to claim 1, wherein said color modulation generator further comprises at least one additional LFO generating an additional oscillating signal, the color mixer performing a summation of said additional oscillating signal with said oscillating signal, thereby allowing a complex modulation of said light projected by said light projection device.

4. The light modulation device according to claim 3, wherein the oscillating signal and additional oscillating signal have distinct predetermined frequencies selected so that said complex modulation combines simultaneous slow and fast modulations.

5. The light modulation device according to claim 3, wherein said color modulation generator comprises:

a first modulation set including said main LFO and at least one control LFO operatively connected to the main LFO for controlling at least one of waveform parameters of the oscillating signal; and

a second modulation set including said additional LFO and at least one control LFO operatively connected to the additional LFO for controlling at least one of waveform parameters of the additional oscillating signal.

6. The light modulation device according to claim 1, wherein said color modulation generator comprises at least one control LFO operatively connected to the main LFO for controlling at least one of waveform parameters of the oscillating signal for allowing a complex modulation of said light projected by said light projection device.

7. A light modulation device for generating modulated color component output signals adapted for use by a light projecting system for modulating light projected thereby, the light modulation device comprising:

an electronic circuit, comprising;

a light modulator generating said color component output signals according to an intensity parameter for controlling a brightness of said light and a color parameter for controlling a hue of said light, said color parameter being controlled by a color complex modulated signal; and

a complex color modulation generator generating said color complex modulated signal, the complex color modulation generator being in communication with the light modulator for providing the color complex modulated signal thereto, said complex color modulation generator having a plurality of Low Frequency Oscillators (LFO) each generating an oscillating signal, the color complex modulated signal resulting from a combination of the oscillating signals of each of said LFOs, said complex color modulation generator comprising a color mixer performing a summation of the oscillating signal of at least one of said LFOs with a base color signal, thereby providing a combined color signal, said color mixer comprising a modulo summation element such that;

C_combined(t)=(C_b(t)+C_lfo(t))modulo C_range;

wherein t represents time, C_combined(t) is the combined color signal, C_b( t) is the base color signal, C_lfo(t) is the oscillating signal of the corresponding LFO and C_range is a maximum authorized value for C_b(t) and C_lfo(t).

8. The light modulation device according to claim 7, wherein said color mixer performs a summation of the oscillating signals from at least two of said LFOs, said oscillating signals having distinct predetermined frequencies selected so that said color complex modulated signal combines simultaneous slow and fast modulations.

9. The light modulation device according to claim 7, wherein the plurality of LFOs of said complex color modulation generator comprises a main LFO and at least one control LFO operatively connected to the main LFO for controlling at least one of waveform parameters of the oscillating signal therefrom.

10. The light modulation device according to claim 7, wherein the plurality of LFOs of said complex color modulation generator comprises:

a first modulation set including a main LFO and at least one control LFO operatively connected to the main LFO for controlling at least one of waveform parameters of the oscillating signal therefrom; and

a second modulation set including an additional LFO and at least one control LFO operatively connected to the additional LFO for controlling at least one of waveform parameters of the additional oscillating signal therefrom.

11. The light modulation device according to claim 7, wherein said intensity parameter is controlled by a base signal.

12. The light modulation device according to claim 7, wherein said intensity parameter is controlled by a simple modulated signal, the light modulation device comprising a simple modulation generator for generating the simple modulated signal, the simple modulation generator being in communication with the light modulator for providing the simple modulated signal thereto, said simple modulation generator having:

a main Low Frequency Oscillator (LFO) generating an oscillating signal; and

an intensity mixer multiplying said oscillating signal of the main LFO with a base signal, thereby providing said simple modulated signal.

13. The light modulation device according to claim 7, wherein said intensity parameter is controlled by an intensity complex modulated signal generated by a complex intensity modulation generator.

14. The light modulation device according to claim 13, wherein, for each of the complex intensity and color modulation generators, the plurality of LFOs comprises:

a first modulation set including a main LFO and at least one control LFO operatively connected to the main LFO for controlling at least one of waveform parameters of the oscillating signal therefrom; and

a second modulation set including an additional LFO and at least one control LFO operatively connected to the additional LFO for controlling at least one of waveform parameters of the additional oscillating signal therefrom;

for each of the complex intensity and color modulation generators, the oscillating signals of the main LFO and additional LFO having distinct predetermined frequencies selected so that the corresponding complex modulated signal combines simultaneous slow and fast modulations.

15. A light modulation device for generating modulated color component output signals adapted for use by a light projecting system for modulating light projected thereby, the light modulation device comprising:

an electronic circuit, comprising;

a light modulator generating said color component output signals according to an intensity parameter for controlling a brightness of said light and a color parameter for controlling a hue of said light, said intensity parameter being controlled by an intensity complex modulated signal; and

a complex intensity modulation generator generating said intensity complex modulated signal, the complex intensity modulation generator being in communication with the light modulator for providing the intensity complex modulated signal thereto, said complex intensity modulation generator having a plurality of Low Frequency Oscillators (LFO) each generating an oscillating signal, the intensity complex modulated signal resulting from a combination of the oscillating signals of each of said LFOs, wherein said complex intensity modulation generator comprising an intensity mixer multiplying the oscillating signal of at least one of said LFOs with a base intensity signal, said intensity mixer comprising a multiplicator such that;

I_combined(t)=I_b(t)*(1−

I_lfo(t)/I_range);

wherein t represents time, I_combined is the combined intensity signal, I_b(t) is the base intensity signal, I_lfo(t) is the oscillating signal of the corresponding LFO and I_range is a maximum authorized value for I_b(t) and I_lfo(t).

16. The light modulation device according to claim 15, wherein said color parameter is controlled by a color complex modulated signal, the electronic circuit further comprising a complex color modulation generator generating said color complex modulated signal, the complex color modulation generator being in communication with the light modulator for providing the color complex modulated signal thereto, wherein said complex color modulation generator comprising a color mixer performing a summation of the oscillating signal of at least one of said LFOs with a base color signal, thereby providing a combined color signal, said color mixer comprising a modulo summation element such that:

C_combined(t)=(C_b(t)+C_lfo(t))modulo C_range;

wherein t represents time, C_combined(t) is the combined color signal, C_b(t) is the base color signal, C_lfo(t) is the oscillating signal of the corresponding LFO and C_range is a maximum authorized value for C_b(t) and C_lfo(t).