Enhancing a field sequential color palette in an optical display

• US 20060268386A1
• Filed: 05/08/2006
• Published: 11/30/2006
• Est. Priority Date: 02/26/2002
• Status: Active Grant

• Current Assignee: Rambus Delaware
• Original Assignee: Uni-Pixel Displays Incorporated (Uni-Pixel Incorporated)
• Inventors: Selbrede, Martin G., Essman, Lynn
• Granted Patent: US 7,515,326 B2
• Time in Patent Office: Days
• US Class Current: 359/290
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence
• CPC Class Codes: G06F 2203/04109 FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2320/0633 by amplitude modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2360/142 the light being detected by light detection means within each pixel
• CPC Class Codes: G09G 2360/148 the light being detected by light detection means within each pixel
• CPC Class Codes: G09G 3/2018 by time modulation using two or more time intervals
• CPC Class Codes: G09G 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: G09G 3/2081 with combination of amplitude modulation and time modulation space and time error diffusion G09G3/2066
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3433 using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20

Abstract

A circuit for implementing a registration-free, contiguous conductive plane. A circuit may include a plurality of conductive structures in a first plane. The circuit may further include a contiguous conductive equipotential surface in a second plane parallel to the first plane. The circuit may further include activation means configured to adjust an electric field between the first and second planes thereby activating one or more structures in the first plane by increasing a potential difference between the first and second planes to a threshold level deemed to constitute an active state. The circuit may further include deactivation means configured to adjust the electric field between the first and second planes thereby deactivating one or more structures in the first plane by decreasing the potential difference between the first and second planes below a threshold level deemed to constitute a deactivated state.

Claims

1-14. -14. (canceled)

15. A method for enhancing a field sequential color palette comprising the steps of:

dividing each primary color subcycle into a plurality of subdivisions, wherein a palette size increases in proportion to said plurality of subdivisions;

adjusting an intensity of a plurality of drive lamps for certain determinate divisions of each primary color subcycle; and

activating a number of said plurality of drive lamps at any particular point in each primary color subcycle.

16. The method as recited in claim 15, wherein a pulse signal display is turned on and off only once during each primary color subcycle.

17. The method as recited in claim 15, wherein a pulse signal display is turned on and off more than once during each primary color subcycle.

18. The method as recited in claim 15 further comprising the step of:

rotating off-duty drive lamps so that an overall duty cycle is balanced between all of said plurality of drive lamps.

19. The method as recited in claim 15, wherein one or more additional bits of information is added to each primary color subcycle as a result of adjusting said intensity of said plurality of drive lamps.

20. The method as recited in claim 19, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps.

21. The method as recited in claim 19, wherein said intensity of said plurality of drive lamps is adjusted by controlling how many of said plurality of drive lamps are activated.

22. The method as recited in claim 19, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps and controlling how many of said plurality of drive lamps are activated.

23. A system, comprising:

a processor;

a memory unit;

an input mechanism;

a display; and

a bus system for coupling said processor to said memory unit, said input mechanism and said display;

wherein said display comprises;

a plurality of pixels on said display; and

a plurality of drive lamps for providing light to said plurality of pixels, wherein said plurality of drive lamps are driven to cause each of said plurality of pixels to generate a color palette, wherein said plurality of drive lamps are driven such that each primary color subcycle is divided into a plurality of subdivisions, wherein an intensity of said plurality of drive lamps is adjusted for certain determinate divisions of each primary color subcycle, wherein a number of said plurality of drive lamps is activated at any particular point in each primary color subcycle.

24. The system as recited in claim 23, wherein a pulse signal display is turned on and off only once during each primary color subcycle.

25. The system as recited in claim 23, wherein a pulse signal display is turned on and off more than once during each primary color subcycle.

26. The system as recited in claim 23, wherein off-duty drive lamps are rotated such that an overall duty cycle is balanced between all of said plurality of drive lamps.

27. The system as recited in claim 23, wherein one or more additional bits of information is added to each primary color subcycle as a result of adjusting said intensity of said plurality of drive lamps.

28. The system as recited in claim 27, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps.

29. The system as recited in claim 27, wherein said intensity of said plurality of drive lamps is adjusted by controlling how many of said plurality of drive lamps are activated.

30. The system as recited in claim 27, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps and controlling how many of said plurality of drive lamps are activated.

31. A method for enhancing a field sequential color palette comprising the steps of:

driving each primary color using a plurality of a plurality of drive lamps;

dividing each primary color subcycle into a plurality of subdivisions, wherein a palette size increases in proportion to a number of said plurality of subdivisions and in proportion to a number of primary colors;

adjusting an intensity of said plurality of drive lamps for certain determinate divisions of each primary color subcycle, wherein adjusting said intensity of said plurality of drive lamps adds one or more additional binary bits of information to each primary color; and

activating a number of said plurality of drive lamps at any particular point in each primary color subcycle.

32. The method as recited in claim 31, wherein said palette size increases by a cube of said one or more additional binary bits.

33. The method as recited in claim 32, wherein one or more intensity notches form at a leading edge of each lamp on-cycle for each pixel as a result of adding said one or more additional binary bits.

34. The method as recited in claim 33, wherein said one or more intensity notches represent encoding of gray scale information.

35. The method as recited in claim 31, wherein a pulse signal display is turned on and off only once during each primary color subcycle.

36. The method as recited in claim 31, wherein a pulse signal display is turned on and off more than once during each primary color subcycle.

37. The method as recited in claim 31 further comprising the step of:

rotating off-duty drive lamps so that an overall duty cycle is balanced between all of said plurality of drive lamps.

38. The method as recited in claim 31, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps.

39. The method as recited in claim 31, wherein said intensity of said plurality of drive lamps is adjusted by controlling how many of said plurality of drive lamps are activated.

40. The method as recited in claim 31, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps and controlling how many of said plurality of drive lamps are activated.

41. A system for enhancing a field sequential color palette, comprising:

means for driving each primary color using a plurality of a plurality of drive lamps;

means for dividing each primary color subcycle into a plurality of subdivisions, wherein a palette size increases in proportion to a number of said plurality of subdivisions and in proportion to a number of primary colors;

means for adjusting an intensity of said plurality of drive lamps for certain determinate divisions of each primary color subcycle, wherein adjusting said intensity of said plurality of drive lamps adds one or more additional binary bits of information to each primary color; and

means for activating a number of said plurality of drive lamps at any particular point in each primary color subcycle.

42. The system as recited in claim 41, wherein said palette size increases by a cube of said one or more additional binary bits.

43. The system as recited in claim 42, wherein one or more intensity notches form at a leading edge of each lamp on-cycle for each pixel as a result of adding said one or more additional binary bits.

44. The system as recited in claim 43, wherein said one or more intensity notches represent encoding of gray scale information.

45. The system as recited in claim 41, wherein a pulse signal display is turned on and off only once during each primary color subcycle.

46. The system as recited in claim 41, wherein a pulse signal display is turned on and off more than once during each primary color subcycle.

47. The system as recited in claim 41 further comprising:

means for rotating off-duty drive lamps so that an overall duty cycle is balanced between all of said plurality of drive lamps.

48. The system as recited in claim 41, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps.

49. The system as recited in claim 41, wherein said intensity of said plurality of drive lamps is adjusted by controlling how many of said plurality of drive lamps are activated.

50. The system as recited in claim 41, wherein said intensity of said plurality of drive lamps is adjusted by modulating an energy provided to illuminate said plurality of drive lamps and controlling how many of said plurality of drive lamps are activated.