Selectable color adjustment for image display

• US 20030227577A1
• Filed: 03/14/2003
• Published: 12/11/2003
• Est. Priority Date: 01/31/2002
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Allen, William J., Pate, Michael A., Howard, Peter Guy, Dixon, Brian S.
• Granted Patent: US 7,283,181 B2
• Time in Patent Office: Days
• US Class Current: 348/742
• CPC Class Codes: G02B 26/008 in the form of devices for effecting sequential colour changes, e.g. colour wheels
• CPC Class Codes: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: G03B 21/2053 Intensity control of illuminating light controlled by video signal processing H04N5/74 or H04N9/31
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: H04N 9/3114 by using a sequential colour filter producing one colour at a time
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406
• CPC Class Codes: H04N 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607
• CPC Class Codes: H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control camera processing pipelines for colour balance H04N23/88

Abstract

A display system is configured to produce a color image formed of a plurality of differently colored images and may include at least one light source that directs light along an optical path, and at least one filter having a given optical filter characteristic. The display system may be selectively operable in a first state in which the optical path does not pass through a first filter during production of the plurality of differently colored images to form a color image having a first optical characteristic, and in a second state in which the optical path passes through the first filter during production of the plurality of differently colored images to form a color image having a second optical characteristic different than the first optical characteristic.

Claims

1. A display system comprising:

at least one light source that directs light along an optical path; and

at least one filter having a given optical filter characteristic;

the display system being configured to produce a color image formed of a plurality of differently colored images, and to be selectively operable in a first state in which the optical path does not pass through a first filter during production of the plurality of differently colored images to form a color image having a first optical characteristic, and in a second state in which the optical path passes through the first filter during production of the plurality of differently colored images to form a color image having a second optical characteristic different than the first optical characteristic.

2. The display system of claim 1, wherein the display system is further configured to produce at least one of the differently colored images in a first manner related to the first optical characteristic when the display system is operating in the first state, and in a second manner related to the second optical characteristic when the display system is operating in the second state, the second manner being different than the first manner.

3. The display system of claim 2, wherein the light source is a colored light source configured to produce differently colored light and the display system further comprises a light modulator configured to modulate the colored light in a first manner forming the colored images when the display system is operating in the first state and configured to modulate the colored light in a second manner different than the first manner when the display system is operating in the second state.

4. The display system of claim 2, wherein the light source produces light based on a level of energy applied to the light source, and the display system is further configured to apply energy to the light source in a first manner when the display system is operating in the first state and apply energy to the light source in a second manner different than the first manner when the display system is operating in the second state.

5. The display system of claim 2, wherein the display system is further configured to produce an indication of the operating state, and to produce the differently colored images in the manner corresponding to the indication of the operating state.

6. The display system of claim 5, further configured to produce the indication of the operating state in response to the positions of the optical path and filter relative to each other.

7. The display system of claim 1 further comprising a plurality of filters, with each filter having an associated optical filter characteristic, and wherein the optical path passes through a plurality of filters in the second state.

8. The display system of claim 7 wherein each of the filters and the optical path are relatively movable between a first position in which the optical path does not pass through the filter and in a second position in which the optical path passes through the filter.

9. The display system of claim 8, further comprising an identifier configured to identify a display condition, the display system further configured to move a plurality of filters relative to the optical path in response to the identified display condition.

10. The display system of claim 9, wherein the identifier comprises at least one of a selectable-gamut selector, an ambient-light sensor, an image-content analyzer, and a display-appearance analyzer.

11. The display system of claim 1, further comprising an identifier configured to identify a display condition, the display system further configured to change the state of operation in response to an identified display condition.

12. The display system of claim 11, wherein the identifier comprises at least one of a selectable-gamut selector, an ambient-light sensor, an image-content analyzer, and a display-appearance analyzer.

13. The display system of claim 1, wherein the display system is configured to change state by at least one of moving the optical path relative to the light source, and moving the at least one filter relative to the optical path.

14. The display system of claim 1, wherein the display system further comprises a carrier configured to support at least one of the filter and an element configured to change the direction of the optical path, the carrier and the element each being movable between a first position in which the display system is operating in the first state, and a second position in which the display system is operating in the second state.

15. The display system of claim 14, wherein the carrier is manipulatable by a user.

16. The display system of claim 15, wherein the display system is further configured to produce an indication of the position of the carrier, and to produce the differently colored images based on the indicated operating state.

17. A display system comprising:

a light source configured to direct light along an optical path;

a color wheel having a plurality of color filter regions, the color wheel being configured to sequentially pass the color filter regions through the optical path and produce sequentially colored light;

a light modulator impinged by the sequentially colored light and configured to modulate the colored light in a manner to produce corresponding sequentially colored images;

optics directing the sequentially colored lights along the optical path;

at least one filter having a given optical filter characteristic; and

a carrier configured to support at least one of the at least one filter and an element configured to change the direction of the optical path, the carrier being movable between a first position in which the optical path does not pass through a first filter and a second position in which the optical path passes through the first filter.

18. The display system of claim 17 further comprising a plurality of filters supported on a carrier configured to provide independent movement of each filter into and out of the optical path.

19. A display system usable with a filter having a given optical filter characteristic and configured to be placed in an optical path, the display system configured to direct light along an optical path, and to produce, in response to an indication of the relative positions of the filter and the optical path, a color image formed of a plurality of differently colored images that are modulated in a first manner when the filter is in the optical path, and that are modulated in a second manner different than the first manner when the filter is not in the optical path.

20. A filter usable with a display system configured to direct light along an optical path, and to produce, in response to an indication of the relative positions of a filter having a given optical filter characteristic and the optical path, a displayed color image formed of a plurality of differently colored images that are modulated in a first manner when the filter is in the optical path, and that are modulated in a second manner when the filter is not in the optical path, the second manner being different than the first manner, the filter having the given optical filter characteristic and configured to be placed in the optical path,

21. A method comprising:

directing light along an optical path; and

producing a color image formed of a plurality of differently colored images by selectively operating in a first state in which light is directed along an optical path spaced from a first filter to produce the color image having a first optical characteristic, and in a second state in which light is directed along an optical path passing through the first filter to produce the color image having a second optical characteristic different than the first optical characteristic.

22. The method of claim 21, further comprising producing at least one of the differently colored images in a first manner related to the first optical characteristic when the display system is operating in the first state, and in a second manner related to the second optical characteristic when the display system is operating in the second state, the second manner being different than the first manner.

23. The method of claim 22, wherein directing includes directing differently colored light along the optical path, and modulating the colored light in a first manner forming the colored images when the display system is operating in the first state and modulating the colored light in a second manner different than the first manner when the display system is operating in the second state.

24. The method of claim 22, further comprising producing light based on a level of energy applied to the light source, and applying energy to the light source in a first manner during operating in the first state and applying energy to the light source in a second manner different than the first manner when operating in the second state.

25. The method of claim 22, further producing an indication of the operating state, and wherein producing the differently colored images includes producing the differently colored images in the manner corresponding to the indication of the operating state.

26. The method of claim 25, wherein producing an indication further comprises producing the indication of the operating state in response to the positions of the optical path and filter relative to each other.

27. The method of claim 21, wherein operating includes selectively operating in the second state in which light is directed along the optical path which passes through a plurality of filters in the second state, with each filter having an associated optical filter characteristic.

28. The method of claim 27, further comprising moving each of the plurality of filters from a first position in which the optical path does not pass through the filter to a second position in which the optical path passes through the filter.

29. The method of claim 28, further comprising identifying a display condition, and moving a plurality of filters relative to the optical path in response to the identified display condition.

30. The method of claim 29, wherein identifying comprises at least one of selecting a gamut, sensing ambient light, analyzing image content, and analyzing display appearance.

31. The method of claim 21, further comprising identifying a display condition, and moving a plurality of filters relative to the optical path in response to the identified display condition.

32. The method of claim 31, wherein identifying comprises at least one of selecting a gamut, sensing ambient light, analyzing image content, and analyzing display appearance.

33. The method of claim 21, further comprising changing the operating state by moving at least one of the optical path and the filter relative to the light source.

34. The method of claim 21, wherein moving comprises manually moving at least one of the optical path and the filter.

35. The method of claim 34, further comprising producing an indication of the relative position of the filter and the optical path, and producing the differently colored images based on the indication.

36. A display system comprising:

means for directing light along an optical path;

at least one means for filtering light with a given optical filter characteristic; and

means for producing a color image formed of a plurality of differently colored images by selectively operating in a first state in which light is directed along an optical path spaced from the at least one filtering means to produce the color image having a first optical characteristic, and in a second state in which light is directed along an optical path passing through at least one filtering means to produce the color image having a second optical characteristic different than the first optical characteristic.

37. The display system of claim 36, wherein the producing means is further for producing at least one of the differently colored images in a first manner related to the first optical characteristic when the display system is operating in the first state, and in a second manner related to the second optical characteristic when the display system is operating in the second state, the second manner being different than the first manner.

38. The display system of claim 37, wherein the directing means includes means for directing differently colored light along the optical path, and the producing means includes means for modulating the colored light in a first manner forming the colored images when the display system is operating in the first state and for modulating the colored light in a second manner different than the first manner when the display system is operating in the second state.

39. The display system of claim 37, wherein the directing means includes means for producing light based on a level of energy applied, and the image-producing means includes means for applying energy to the light-producing means in a first manner during operating in the first state and applying energy to the light-producing means in a second manner different than the first manner when operating in the second state.

40. The display system of claim 37, further comprising means for producing an indication of the operating state, and wherein the means for producing the differently colored images includes producing the differently colored images in the manner corresponding to the indication of the operating state.

41. The display system of claim 40, wherein the means for producing an indication further comprises producing the indication of the operating state in response to the positions of the optical path and filter relative to each other.

42. The display system of claim 36, wherein the producing means is further for directing light through a plurality of the filtering means when operating in the second state, with each filter having an associated optical filter characteristic.

43. The display system of claim 42, wherein the producing means further comprises means for moving each of the plurality of filters from a first position in which the optical path does not pass through the filter to a second position in which the optical path passes through the filter.

44. The display system of claim 43, wherein the producing means further comprises means for identifying a display condition, and means for moving a plurality of filters relative to the optical path in response to the identified display condition.

45. The display system of claim 44, wherein the identifying means comprises at least one of means for selecting a gamut, means for sensing ambient light, means for analyzing image content, and means for analyzing display appearance.

46. The display system of claim 36 further comprising means for identifying a display condition, and the producing means includes means for moving a plurality of filters relative to the optical path in response to the identified display condition.

47. The display system of claim 46, wherein the identifying means comprises at least one of means for selecting a gamut, means for sensing ambient light, means for analyzing image content, and means for analyzing display appearance.

48. The display system of claim 36, wherein the producing means further comprises means for changing the operating state by moving at least one of the optical path and the filter relative to the light source.

49. The display system of claim 36, wherein the producing means further comprises means for manually moving at least one of the optical path and the filter.

50. The display system of claim 49, further comprising means for producing an indication of the relative position of the filter and the optical path, and the producing means further for producing the differently colored images based on the indication.