Real time low cost, large scale array 65K color display using lamps

• US 5,612,710 A
• Filed: 08/22/1995
• Issued: 03/18/1997
• Est. Priority Date: 08/22/1995
• Status: Expired due to Fees

• Current Assignee: Trans-Lux Midwest Corporation (Unilumin Group Co. Ltd.)
• Original Assignee: Fairtron Corporation
• Inventors: DeVries, Douglas E., Walter, Michael W., Prachar, Timothy J., Smith, Daniel W., Phelps, William G., Foster, Jacques Y., Carter, Jack L., Foster, Alan S., Christensen, Thomas C.
• Primary Examiner(s): Powell, Mark R.
• Assistant Examiner(s): LOCKETT, KUNIKI
• Application Number:
  US08/517,624
• Time in Patent Office: 574 Days
• Field of Search: 345/30, 345/150, 345/55, 345/59, 345/147, 345/190, 340/815.42, 340/815.53, 340/811, 358/56, 358/532, 348/799, 348/803
• US Class Current: 345/30
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 3/2011 by amplitude modulation
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/24 using incandescent filaments

Abstract

A large scale video display of the present invention is designed to receive a standard NTSC video signal and display it on a large scale array of low cost, voltage or current controlled lamp transducers. The video signals are received by a video capture device which receives and digitizes the video signal. A host processor formats the digital data into a number of 16 bit data words each corresponding to a pixel. A coprocessor receives the 16 bit data words and reformats the data. The reformatted data is connected to a large scale display by a fiber optic connection. The display includes a number of transceivers which receive the formatted video data in a memory buffer. The transceivers also receive a board map from the coprocessor. The map indicates which light boards correspond to each part of the memory where the frame image is stored. This information is used by a number of controllers to determine which lights to turn on and at what level of brightness for any given time.

Claims

1. A large scale color video display comprising:

a video capture device for receiving video signals and converting the video signals into digitized video signals;

a video processor electrically connected to the video capture device for receiving and processing the digitized video signals and formatting the digitized video signals into multicolor pixel words, wherein each word includes multicolor data for a single pixel of a large scale video display;

a video controller connected to the video processor for receiving the formatted video signals including the multicolor pixel words and partitioning the formatted video signals into a plurality of sections; and

a plurality of lamp display grids positioned together to form a large scale display, said lamp display grids each being connected to the video controller for displaying one of the plurality of sections of formatted video signals.

2. The large scale video display of claim 1 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the digitized video signals into the multicolor pixel words each corresponding to at least one lamp on the large scale display; and

a coprocessor for receiving the words and reformatting the data into alternating rows of data such that the pixels are formed and are comprised of displayed data from two consecutive rows of data.

3. The large scale video display of claim 2 wherein each multicolor pixel word is a 16 bit word including 4 sets of 4 bits, each set describing a color.

4. The large scale video display of claim 1 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the the digitized video signals into the multicolor pixel words each comprising a 32 bit data word corresponding to a single pixel on the large scale display; and

a coprocessor for receiving the 32 bit data words and reformatting the data into alternating rows of data such that the pixels are formed comprising displayed data from two consecutive rows of data.

5. The large scale video display of claim 1 wherein said video capture device receives the video signal and converts the signal into RGB format.

6. The large scale video display of claim 5 wherein said processor receives the digitized video signals in RGB format and converts the signal into RGBW format.

7. The large scale video display of claim 6 wherein said processor converts the digitized video signals into RGBW format by calculating RGBW values from the RGB values.

8. The large scale video display of claim 7 wherein said processor converts the digitized video signals into RGBW format by calculating a white value based on the relationship W=0.5 R+0.25 G+0.125 B.

9. The large scale video display of claim 1 wherein said video capture device receives the video signal and converts the signal into YUV format.

10. The large scale video display of claim 9 wherein said processor receives the video signal in YUV format and converts the signal into RGBW format.

11. The large scale video display of claim 1 wherein said multicolor pixel words are comprised of 16 bit words.

12. The large scale video display of claim 11 wherein each of said 16 bit words has four bits corresponding to each of red, blue, green, and white color levels.

13. The large scale video display of claim 1 wherein said multicolor pixel words are comprised of 32 bit words.

14. The large scale video display of claim 13 wherein each of said 32 bit words has eight bits corresponding to each of red, blue, green, and white color levels.

15. The large scale video display of claim 1 wherein the video processor transmits the multicolor pixel words to the video controller over a fiber optic connection.

16. The large scale video display of claim 1 wherein the said video controller further comprises:

at least one transceiver for receiving and partitioning the video data; and

a plurality of control devices each connected to one of the transceivers for receiving video data and controlling individual lamp intensities.

23. The large scale video display of claim 1 wherein the video processor is capable of receiving image data, formatting the image data into multicolor pixel words, and combining the image data with the digitized video signals.

26. The large scale color video display of claim 1 wherein the multicolor pixel words contain all of the place values for each color of each pixel.

27. The large scale video display of claim 26 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the digitized video signals into the multicolor pixel words each corresponding to at least one lamp on the large scale display; and

a coprocessor for receiving the words and reformatting the data into alternating rows of data such that the pixels are formed and are comprised of displayed data from two consecutive rows of data.

28. The large scale video display of claim 27 wherein each multicolor pixel word is a 16 bit word including 4 sets of 4 bits, each set describing a color.

29. The large scale video display of claim 26 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the digitized video signals into the multicolor pixel words each comprising a 32 bit data word corresponding to a single pixel on the large scale display; and

a coprocessor for receiving the 32 bit data words and reformatting the data into alternating rows of data such that the pixels are formed comprising displayed data from two consecutive rows of data.

30. The large scale video display of claim 26 wherein said video capture device receives the video signal and converts the signal into RGB format.

31. The large scale video display of claim 30 wherein said processor receives the digitized video signals in RGB format and converts the signal into RGBW format.

32. The large scale video display of claim 31 wherein said processor converts the digitized video signals into RGBW format by calculating RGBW values from the RGB values.

33. The large scale video display of claim 32 wherein said processor converts the digitized video signals into RGBW format by calculating a white value based on the relationship W=0.5 R+0.25 G+0.125 B.

34. The large scale video display of claim 26 wherein said video capture device receives the video signal and converts the signal into YUV format and wherein said processor receives the video signal in YUV format and converts the signal into RGBW format.

35. The large scale video display of claim 26 wherein said multicolor pixel words are comprised of 16 bit words.

36. The large scale video display of claim 35 wherein each of said 16 bit words has four bits corresponding to each of red, blue, green, and white color levels.

37. The large scale video display of claim 26 wherein said multicolor pixel words are comprised of 32 bit words.

38. The large scale video display of claim 37 wherein each of said 32 bit words has eight bits corresponding to each of red, blue, green, and white color levels.

39. The large scale video display of claim 26 wherein the video processor transmits the multicolor pixel words to the video controller over a fiber optic connection.

40. The large scale video display of claim 26 wherein said video controller further comprises:

at least one transceiver for receiving and partitioning the video data; and

a plurality of control devices each connected to one of the transceivers for receiving video data and controlling individual lamp intensities.

61. The large scale video display of claim 5 wherein said processor receives the digitized video signals in RGB format and converts the signal into RGGB format.

62. The large scale video display of claim 5 wherein said processor receives the digitized video signals in RGB format and converts the signal into RGBB format.

17. A method of displaying real-time color video images comprising the steps of:

capturing a plurality of frames of video images from a video source;

converting each frame into digital data;

calculating color values from the digital data and formatting the data into a color pixel format by creating a single word for each pixel wherein each word includes data corresponding to multiple colors and intensities for each pixel;

providing a plurality of lamps positioned together to form a video display;

partitioning said plurality of lamps into a plurality of grids;

partitioning the formatted data from each frame into a plurality of sets of data, each set corresponding to one of the grids of lamps and each set including the words corresponding to contiguous lamps within each pixel in each respective grid;

controlling each lamp grid by addressing and controlling each individual lamp based on the sets of data such that a representation of the frame of the video image is displayed; and

sequentially displaying the plurality of frames of video images.

18. The method of claim 17 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount of time, said amount of time being dependent upon the desired intensity.

19. The method of claim 17 further comprising the step of:

selectively controlling the intensity of each individual lamp by powering the lamps with a voltage having an amplitude dependent on the desired intensity of each individual lamp.

20. The method of claim 17 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount with a voltage having an certain amplitude, said certain amount of time and certain voltage both being dependent on the desired intensity of each individual lamp.

21. The method of claim 17 further comprising the steps of:

selectively controlling the intensity of each individual lamp by turning on the lamp at a time after an AC power signal zero crossing based on a digital lamp intensity value and leaving the lamp on for the remainder of that half cycle of the AC power.

22. The method of claim 17 further comprising the step of:

turning on all of the lamps for a certain amount of time during each cycle of the AC power signal to extend lamp life.

24. The method of claim 17 further comprising the steps of:

providing secondary image data;

formatting the secondary image data into image data words;

combining the image data words with the words from the video source before displaying the plurality of frames of video images.

25. An apparatus for processing and displaying video information over a plurality of pixels forming a large scale video display comprising:

a video capture device for receiving a plurality of frames of video signals from a video source and converting the video signals into digital video signals;

a video processor electrically connected to the video capture device for receiving the digital video signals and formatting the digital video signals by creating a single multicolor data word corresponding to each pixel of the video display, each multicolor data word containing data relating to multiple colors and intensities for a single pixel;

a video controller connected to the video processor for receiving the formatted video signals and partitioning the formatted video signals into a plurality of sections; and

a plurality of light boards each comprising a portion of the plurality of pixels, said light boards each being connected to the video controller for displaying one of the plurality of sections of formatted video signals.

41. A large scale monochrome video display comprising:

a video capture device for receiving video signals and converting the video signals into digitized video signals;

a video processor electrically connected to the video capture device for receiving and processing the digitized video signals and formatting the digitized video signals into monochrome pixel words, wherein each word includes monochrome data for a single pixel of a large scale video display and wherein the monochrome pixel words each contain all of the place values for the data for each respective pixel;

a video controller connected to the video processor for receiving the formatted video signals including the monochrome pixel words and partitioning the formatted video signals into a plurality of sections; and

a plurality of lamp display grids positioned together to form a large scale display, said lamp display grids each being connected to the video controller for displaying one of the plurality of sections of formatted video signals.

42. The large scale video display of claim 41 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the digitized video signals into the monochrome pixel words each corresponding to at least one lamp on the large scale display; and

a coprocessor for receiving the words and reformatting the data into rows of data such that the pixels are formed and are comprised of displayed data from at least one lamp.

43. The large scale video display of claim 42 wherein each monochrome pixel word is a 16 bit word.

44. The large scale video display of claim 41 wherein said video processor further comprises:

a first processor for receiving the digitized video signals from the video capture device and formatting the digitized video signals into the monochrome pixel words each comprising a 32 bit data word corresponding to a single pixel on the large scale display; and

a coprocessor for receiving the 32 bit data words and reformatting the data into rows of data such that the pixels are formed comprising displayed data from at least one lamp.

45. The large scale video display of claim 41 wherein said monochrome pixel words are comprised of 4 bit words.

47. The large scale video display of claim 41 wherein the video processor transmits the monochrome pixel words to the video controller over a fiber optic connection.

48. The large scale video display of claim 41 wherein the said video controller further comprises:

at least one transceiver for receiving and partitioning the video data; and

a plurality of control devices each connected to one of the transceivers for receiving video data and controlling individual lamp intensities.

46. The large scale video display of clam 41 wherein said monochrome pixel words are comprised of 8 bit words.

49. A method of displaying real-time monochrome images comprising the steps of:

capturing a plurality of frames of video images from a video source;

converting each frame into digital data;

calculating monochrome values from the digital data and formatting the data into a monochrome pixel format by creating a single word for each pixel wherein each word includes data corresponding to the intensity for each pixel and wherein each word contains all of the place values for the intensity of each respective pixel;

providing a plurality of lamps positioned together to form a video display;

partitioning said plurality of lamps into a plurality of grids;

partitioning the formatted data from each frame into a plurality of sets of data, each set corresponding to one of the grids of lamps and each set including the words corresponding to contiguous lamps within each pixel in each respective grid;

controlling each lamp grid by addressing and controlling each individual lamp based on the sets of data such that a representation of the frame of the video image is displayed; and

sequentially displaying the plurality of frames of video images.

50. The method of claim 49 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount of time, said amount of time being dependent upon the desired intensity.

51. The method of claim 49 further comprising the step of:

selectively controlling the intensity of each individual lamp by powering the lamps with a voltage having an amplitude dependent on the desired intensity of each individual lamp.

52. The method of claim 49 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount of time with a voltage having a certain amplitude, said certain amount of time and certain voltage both being dependent on the desired intensity of each individual lamp.

53. The method of claim 49 further comprising the steps of:

selectively controlling the intensity of each individual lamp by turning on the lamp at a time after an AC power signal zero crossing based on a digital lamp intensity value and leaving the lamp on for the remainder of that half cycle of the AC power.

54. The method of claim 49 further comprising the step of:

turning on all of the lamps for a certain amount of time during each cycle of the AC power signal to extend lamp life.

55. A method of displaying real-time color video images comprising the steps of:

capturing a plurality of frames of video images from a video source;

converting each frame into digital data;

calculating color values from the digital data and formatting the data into a color pixel format by creating a single word for each pixel wherein each word includes data corresponding to multiple colors and intensities for each pixel and wherein each word contains all of the place values for each color of each respective pixel;

providing a plurality of lamps positioned together to form a video display;

partitioning said plurality of lamps into a plurality of grids;

partitioning the formatted data from each frame into a plurality of sets of data, each set corresponding to one of the grids of lamps and each set including the words corresponding to contiguous lamps within each pixel in each respective grid;

controlling each lamp grid by addressing and controlling each individual lamp based on the sets of data such that a representation of the frame of the video image is displayed; and

sequentially displaying the plurality of frames of video images.

56. The method of claim 55 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount of time, said amount of time being dependent upon the desired intensity.

57. The method of claim 55 further comprising the step of:

selectively controlling the intensity of each individual lamp by powering the lamps with a voltage having an amplitude dependent on the desired intensity of each individual lamp.

58. The method of claim 55 further comprising the step of:

selectively controlling the intensity of each individual lamp by turning on the lamp for a certain amount of time with a voltage having a certain amplitude, said certain amount of time and certain voltage both being dependent on the desired intensity of each individual lamp.

59. The method of claim 55 further comprising the steps of:

selectively controlling the intensity of each individual lamp by turning on the lamp at a time after an AC power signal zero crossing based on a digital lamp intensity value and leaving the lamp on for the remainder of that half cycle of the AC power.

60. The method of claim 55 further comprising the step of:

turning on all of the lamps for a certain amount of time during each cycle of the AC power signal to extend lamp life.