Modulation of a background light or any illumination of a mobile phone

• US 7,211,958 B2
• Filed: 08/30/2004
• Issued: 05/01/2007
• Est. Priority Date: 08/17/2004
• Status: Active Grant

• Current Assignee: Dialog Semiconductor GmbH (Renesas Electronics Corporation)
• Original Assignee: Dialog Semiconductor GmbH (Renesas Electronics Corporation)
• Inventors: Adler, Andreas, Maurer, Michael
• Primary Examiner(s): Vo; Tuyet
• Assistant Examiner(s): VU, JIMMY T
• Application Number:
  US10/929,654
• Publication Number:
  US 20060038498A1
• Time in Patent Office: 974 Days
• Field of Search: 315/123, 315/291, 315/294, 315/312, 348/607, 348/608, 455/265
• US Class Current: 315/123
• CPC Class Codes: H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials
• CPC Class Codes: H04M 1/72448 with means for adapting the functionality of the device according to specific conditions
• CPC Class Codes: H04M 19/04 the ringing-current being generated at the substations
• CPC Class Codes: H04M 19/048 Arrangements providing optical indication of the incoming call, e.g. flasher circuits

Abstract

A communication device such as a cellular or wireless telephone handset has a light display, such as handset cover light or display backlight, synchronized to audio signals from multiple audio sources such as a microphone or AM/FM receiver. The communication device further includes an audio to illumination conversion apparatus for modulating the light display in response to the audio signal. The audio to illumination conversion apparatus has a plurality of audio filter circuits for filtering the audio signal to restrict frequency content of the audio signal to a pass-band. Multiple integration circuits generate an energy content signal indicating an energy level within the pass-band and for the whole spectrum of the audio signal. An illumination modulator generates a modulation pattern for the light display in response to the energy content signals from a predefined light show.

Claims

1. An audio to illumination conversion system for modulating an illumination device in response to an audio signal, comprising:

a plurality of audio input sources, each audio input source receiving a sound and converting said sound to said audio signal;

a plurality of audio filter circuits, each audio filter circuit in communication with said audio input sources to receive said audio signal and filter said audio signal to restrict frequency content of said audio signal to a pass-band of each of the plurality of said audio filter circuit;

a plurality of integration circuits, each integration circuit in communication with one of the plurality of audio filter circuits to generate an energy content signal indicating a first energy level within said pass-band of the audio signal; and

an illumination modulator in communication with the plurality of integration circuits to generate a modulation pattern for said illumination device in response to the energy content signals of said plurality of integration circuits.

2. The audio to illumination conversion system of claim 1 further comprising a short term integration circuit in communication with said plurality of audio input sources to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

3. The audio to illumination conversion system of claim 2 wherein said illumination modulator is in communication with said short term integration circuit to further generate said modulation pattern for said illumination device in response to the short term energy content signal.

4. The audio to illumination conversion system of claim 3 further comprising a long term integration circuit in communication with said plurality of audio input sources to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

5. The audio to illumination conversion system of claim 4 wherein said illumination modulator is in communication with said long term integration circuit to further generate said modulation pattern for said illumination device in response to the long term energy content signal.

6. The audio to illumination conversion system of claim 5 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

7. The audio to illumination conversion system of claim 1 further comprising an illumination device control circuit in communication with said illumination modulator to receive said modulation pattern to generate illumination device control signals to control color and brightness of said illumination device.

8. The audio to illumination conversion system of claim 7 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

9. The audio to illumination conversion system of claim 8 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

10. The audio to illumination conversion system of claim 1 wherein the audio source are chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

11. The audio to illumination conversion system of claim 1 wherein the audio source is a sound database containing communication ring tones or recorded sound files.

12. The audio to illumination conversion system of claim 1 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.

13. A communication device comprising

an illumination device for providing lighting of said communication device;

a plurality of audio input sources, each audio input source receiving a sound and converting said sound to said audio signal; and

an audio to illumination conversion apparatus for modulating said illumination device in response to an audio signal, comprising;

a plurality of audio filter circuits, each audio filter circuit in communication with said audio input sources to receive said audio signal and filter said audio signal to restrict frequency content of said audio signal to a pass-band of each of the plurality of said audio filter circuit;

a plurality of integration circuits, each integration circuit in communication with one of the plurality of audio filter circuits to generate an energy content signal indicating a first energy level within said pass-band of the audio signal; and

an illumination modulator in communication with the plurality of integration circuits to generate a modulation pattern for said illumination device in response to the energy content signals of said plurality of integration circuits.

14. The communication device of claim 13 wherein said audio to illumination conversion apparatus further comprises a short term integration circuit in communication with said plurality of audio input sources to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

15. The communication device of claim 14 wherein said illumination modulator is in communication with said short term integration circuit to further generate said modulation pattern for said illumination device in response to the short term energy content signal.

16. The communication device of claim 15 wherein said audio to illumination conversion apparatus further comprises a long term integration circuit in communication with said plurality of audio input sources to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

17. The communication device of claim 16 wherein said illumination modulator is in communication with said long term integration circuit to further generate said modulation pattern for said illumination device in response to the long term energy content signal.

18. The communication device of claim 17 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

19. The communication device of claim 13 wherein said audio to illumination conversion apparatus further comprises an illumination device control circuit in communication with said illumination modulator to receive said modulation pattern to generate illumination device control signals to control color and brightness of said illumination device.

20. The communication device of claim 19 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

21. The communication device of claim 20 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

22. The communication device of claim 13 wherein the audio source are chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

23. The communication device of claim 13 wherein the audio source is a sound database containing communication ring tones or recorded sound files.

24. The communication device of claim 13 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.

25. The communication device of claim 13 wherein said communication device is a cellular telephone handset, a cordless telephone handset, or a personal digital assistant capable of communicating with a telephone network.

26. An audio responsive lighting display comprising

an illumination device for providing illumination of said audio responsive lighting display;

a plurality of audio input sources, each audio input source receiving a sound and converting said sound to said audio signal; and

an audio to illumination conversion apparatus in communication with said plurality of audio input sources and said illumination device for modulating said illumination device in response to said audio signal, comprising;

a plurality of audio filter circuits, each audio filter circuit in communication with said audio input sources to receive said audio signal and filter said audio signal to restrict frequency content of said audio signal to a pass-band of each of the plurality of said audio filter circuit;

a plurality of integration circuits, each integration circuit in communication with one of the plurality of audio filter circuits to generate an energy content signal indicating a first energy level within said passband of the audio signal; and

an illumination modulator in communication with the plurality of integration circuits to generate a modulation pattern for said illumination device in response to the energy content signals of said plurality of integration circuits.

27. The audio responsive lighting display of claim 26 wherein said audio to illumination conversion apparatus further comprises a short term integration circuit in communication with said plurality of audio input sources to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

28. The audio responsive lighting display of claim 27 wherein said illumination modulator is in communication with said short term integration circuit to further generate said modulation pattern for said illumination device in response to the short term energy content signal.

29. The audio responsive lighting display of claim 28 wherein said audio to illumination conversion apparatus further comprises a long term integration circuit in communication with said plurality of audio input sources to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

30. The audio responsive lighting display of claim 29 wherein said illumination modulator is in communication with said long term integration circuit to further generate said modulation pattern for said illumination device in response to the long term energy content signal.

31. The audio responsive lighting display of claim 30 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

32. The audio responsive lighting display of claim 26 wherein said audio to illumination conversion apparatus further comprises an illumination device control circuit in communication with said illumination modulator to receive said modulation pattern to generate illumination device control signals to control color and brightness of said illumination device.

33. The audio responsive lighting display of claim 32 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

34. The audio responsive lighting display of claim 33 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

35. The audio responsive lighting display of claim 26 wherein the audio source are chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

36. The audio responsive lighting display of claim 26 wherein the audio source is a sound database containing telephonic ring tones or recorded sound files.

37. The audio responsive lighting display of claim 26 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.

38. A method for modulating an illumination device in response to an audio signal, comprising the steps of:

selecting one of a plurality of audio input sources to provide an audio signal;

filtering said audio signal to restrict frequency content of said audio signal to at least one pass-band;

integrating said pass-bands of said audio signal to generate an energy content signal indicating a first energy level within said pass-bands of the audio signal; and

generating a modulation pattern for said illumination device in response to the energy content signals of said pass-bands.

39. The method of claim 38 further comprising the step of integrating over a short term audio signal to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

40. The method of claim 39 further comprising the step of generating said modulation pattern for said illumination device in response to the short term energy content signal.

41. The method of claim 40 further comprising the step of integrating over a long term said audio signal to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

42. The method of claim 41 further comprising the step of generating said modulation pattern for said illumination device in response to the long term energy content signal.

43. The method of claim 42 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

44. The method of claim 38 further comprising the step of controlling said illumination device to generate illumination device control signals to control color and brightness of said illumination device in response to said modulation pattern.

45. The method of claim 44 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

46. The method of claim 45 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

47. The method of claim 38 wherein the audio source is chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

48. The method of claim 38 wherein the audio source is a sound database containing communication ring tones or recorded sound files.

49. The method of claim 38 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.

50. An apparatus for modulating an illumination device in response to an audio signal, comprising:

means for selecting one of a plurality of audio input sources to provide an audio signal;

means for filtering said audio signal to restrict frequency content of said audio signal to at least one pass-band;

means for integrating said pass-bands of said audio signal to generate an energy content signal indicating a first energy level within said pass-bands of the audio signal; and

means for generating a modulation pattern for said illumination device in response to the energy content signals of said pass-bands.

51. The apparatus of claim 50 further comprising means for integrating over a short term audio signal to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

52. The apparatus of claim 51 further comprising means for generating said modulation pattern for said illumination device in response to the short term energy content signal.

53. The apparatus of claim 52 further comprising means for integrating over a long term said audio signal to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

54. The apparatus of claim 53 further comprising means for generating said modulation pattern for said illumination device in response to the long term energy content signal.

55. The apparatus of claim 54 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

56. The apparatus of claim 50 further comprising means for controlling said illumination device to generate illumination device control signals to control color and brightness of said illumination device in response to said modulation pattern.

57. The apparatus of claim 56 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

58. The apparatus of claim 57 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

59. The apparatus of claim 50 wherein the audio source is chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

60. The apparatus of claim 50 wherein the audio source is a sound database containing communication ring tones or recorded sound files.

61. The apparatus of claim 50 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.

62. A medium for retaining a computer program which, when executed on a computing system, performs a program process that modulates an illumination device in response to an audio signal, said program process comprising the steps of:

selecting one of a plurality of audio input sources to provide an audio signal;

filtering said audio signal to restrict frequency content of said audio signal to at least one pass-band;

integrating said pass-bands of said audio signal to generate an energy content signal indicating a first energy level within said pass-bands of the audio signal; and

generating a modulation pattern for said illumination device in response to the energy content signals of said pass-bands.

63. The medium for retaining a computer program of claim 62 wherein said program process further comprises the step of integrating over a short term audio signal to generate a short term energy content signal indicating a second energy level of said audio signal over a whole spectrum of said audio signal.

64. The medium for retaining a computer program of claim 63 wherein said program process further comprises the step of generating said modulation pattern for said illumination device in response to the short term energy content signal.

65. The medium for retaining a computer program of claim 64 wherein said program process further comprises the step of integrating over a long term said audio signal to generate a long term energy content signal indicating a mean loudness of said audio signal over a whole spectrum of said audio signal.

66. The medium for retaining a computer program of claim 65 wherein said program process further comprises the step of generating said modulation pattern for said illumination device in response to the long term energy content signal.

67. The medium for retaining a computer program of claim 66 wherein a relationship of said short term energy content signal and said long term energy content signal ensure that sound signals with low energy content provide modulate said illumination device with acceptable light variations.

68. The medium for retaining a computer program of claim 62 wherein said program process further comprises the step of controlling said illumination device to generate illumination device control signals to control color and brightness of said illumination device in response to said modulation pattern.

69. The medium for retaining a computer program of claim 68 wherein said illumination device is a plurality of light-emitting diodes, a liquid crystal display backlight, an incandescent light, a fluorescent light, an electroluminescent light, or an image display element.

70. The medium for retaining a computer program of claim 69 wherein the image display element is a cathode ray tube, a liquid crystal display, or plasma display.

71. The medium for retaining a computer program of claim 62 wherein the audio source is chosen from a group of audio sources consisting of a microphone, an RF receiver, or a digital audio source.

72. The medium for retaining a computer program of claim 62 wherein the audio source is a sound database containing communication ring tones or recorded sound files.

73. The medium for retaining a computer program of claim 62 wherein the audio source includes an analog to digital converter to sample electrical signals generated by a transducer receiving said sound and convert said sample to a digital coding representing said sample of said electrical signals.