WO2007127046B1 - Method and apparatus for providing brightness control in an interferometric modulator (imod) display - Google Patents

Method and apparatus for providing brightness control in an interferometric modulator (imod) display

Info

Publication number
WO2007127046B1
WO2007127046B1 PCT/US2007/008790 US2007008790W WO2007127046B1 WO 2007127046 B1 WO2007127046 B1 WO 2007127046B1 US 2007008790 W US2007008790 W US 2007008790W WO 2007127046 B1 WO2007127046 B1 WO 2007127046B1
Authority
WO
WIPO (PCT)
Prior art keywords
color
interferometric modulator
display pixel
modulator display
spectrum
Prior art date
Application number
PCT/US2007/008790
Other languages
French (fr)
Other versions
WO2007127046A2 (en
WO2007127046A3 (en
Inventor
Marc Mignard
Original Assignee
Qualcomm Mems Technologies Inc
Marc Mignard
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Mems Technologies Inc, Marc Mignard filed Critical Qualcomm Mems Technologies Inc
Publication of WO2007127046A2 publication Critical patent/WO2007127046A2/en
Publication of WO2007127046A3 publication Critical patent/WO2007127046A3/en
Publication of WO2007127046B1 publication Critical patent/WO2007127046B1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/001—Optical devices or arrangements for the control of light using movable or deformable optical elements based on interference in an adjustable optical cavity
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/3466—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on interferometric effect
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Abstract

Methods and systems for providing brightness control in an interferometric modulator (IMOD) display are provided. In one embodiment, an interferometric modulator display pixel is provided that includes a microelectromechanical systems (MEMS) interferometric modulator having an associated first color spectrum, and a color absorber located substantially in front of the interferometric modulator display pixel, in which the color absorber has an associated second color spectrum. The microelectromechanical systems (MEMS) interferometric modulator is operable to shift the first color spectrum relative to the second color spectrum to control a visual brightness of the interferometric modulator display pixel independent of a color of the interferometric modulator display pixel.

Claims

AMENDED CLAIMS received by the International Bureau on 28 December 2007 (28.12.2007)What is claimed is:
1. An interferometric modulator display pixel comprising: a microelectromechanical systems (MEMS) interferometric modulator having an associated first color spectrum indicating a reflectance of light at a first pre-determined peak wavelength, wherein the microelectromechanical systems (MEMS) interferometric modulator is operable to shift the first color spectrum relative to a second color spectrum to control a visual brightness of the interferometric modulator display pixel while reflecting substantially the same color, the second color spectrum indicating absorption of light except at a second predetermined peak wavelength that is different from the first pre-determined wavelength.
2. The interferometric modular display pixel of Claim 1 , further comprising a color absorber located substantially in front of the interferometric modulator, wherein the color absorber has the second color spectrum.
3. The interferometric modulator display pixel of Claim 1 , wherein the visual brightness of the interferometric modulator display pixel increases with greater overlap between the first color spectrum and the second color spectrum, and decreases with less overlap between the first color spectrum and the second color spectrum.
4. The interferometric modulator display pixel of Claim 1 , further comprising a light source.
5. The interferometric modulator display pixel of Claim 1 , wherein the interferometric modulator display pixel comprises a plurality of color space regions, each color space region having a corresponding color spectrum associated therewith; and
25 the interferometric modulator display pixel further comprises a color absorber located substantially in front of each color space region, each color absorber having an associated color spectrum, wherein the microelectromechanical systems (MEMS) interferometric modulator is operable to shift the color spectrum of each color space region relative to a color spectrum of a corresponding color absorber to control a visual brightness of a color associated with each color space region.
6. The interferometric modulator display pixel of Claim 5, wherein the plurality of color space regions comprises one or more of a red color space region, a green color space region, or a blue color space region,
7. The interferometric modulator display pixel of Claim 1, wherein one or more light sources provides light at the second color spectrum associated with the color absorber.
8. The interferometric modulator display pixel of Claim 7, wherein the one or more light sources comprise a narrow spectrum light source or a broad spectrum light source.
9. The interferometric modulator display pixel of Claim 8, wherein the narrow spectrum light source comprises a laser or a light-emitting diode (LED).
10. The interferometric modulator display pixel of Claim 8, wherein the broad spectrum light source comprises a mercury lamp or a carbon arc lamp.
11. The interferometric modulator display pixel of Claim 1 , wherein the microelectromechanical systems (MEMS) interferometric modulator comprises: a first electrode layer; a second electrode layer; a support structure which separates the first electrode layer from the second electrode layer; and a reflective surface located at and movable between a first position and a second position, wherein movement of the reflective surface between the first position and the second position shifts the first color spectrum relative to the second color spectrum.
12. The interferometric modulator display pixel of Claim 11 wherein the reflective surface is on a reflective layer coupled to the second electrode layer.
13. The interferometric modulator display pixel of Claim 11 wherein the reflective surface is on the second electrode layer.
14. A display comprising the interferometric modulator display pixel of Claim 1.
15. The display of Claim 14, further comprising: a processor that is in electrical communication with the interferometric modulator display pixel, the processor being configured to process image data; and a memory device in electrical communication with the processor.
16. The display of Claim 15, further comprising: a first controller configured to send at least one signal to the interferometric modulator display pixel; and a second controller configured to send at least a portion of the image data to the first controller.
17. The display of Claim 15, further comprising an image source module configured to send the image data to the processor.
18. The display of Claim 17, wherein the image source module comprises at least one of a receiver, transceiver, and transmitter.
19. The display of Claim 15, further comprising an input device configured to receive input data and to communicate the input data to the processor.
20. An interferometric modulator display pixel comprising: means for interferometrically modulating light, said modulating means having an associated first color spectrum indicating a reflectance of light at a first pre-determined peak wavelength; and a means for absorbing light and thereby producing a color located substantially in front of the interferometric modulator display pixel, the light absorbing means having an
27 associated second color spectrum indicating absorption of light except at a second predetermined peak wavelength that is different from the first pre-determined wavelength, wherein the modulating means is operable to shift the first color spectrum relative to the second color spectrum to control a visual brightness of the interferometric modulator display pixel independent of a color of the interferometric modulator display pixel.
21. A method of manufacturing an interferometric modulator display device, the method comprising: providing a substrate; forming an optical stack on the substrate; forming a moveable reflective layer over the optical stack, said moveable reflective layer and said optical stack together having an associated first color spectrum indicating a reflectance of light at a first peak wavelength; and providing a color absorber, the color absorber absorbing light except light within a second range of wavelengths that is different from the first-predetermined wavelength, wherein said moveable reflector layer is operable to shift the first color spectrum relative to the second color spectrum to control visual brightness of the interferometric modulator display pixel.
22. The method of Claim 21, wherein the color absorber is formed on a surface of the substrate opposite of the optical stack.
23. The method of Claim 21 , wherein the color absorber is formed on a surface of the substrate on a same side as the optical stack.
24. The method of Claim 21, wherein forming an optical stack on the substrate and forming a moveable reflective layer over the optical stack comprises: forming a first conductive layer on the substrate; depositing an oxide layer over the first conductive layer; depositing a sacrificial layer over the oxide layer; forming a plurality of first support posts to support a second conductive layer; forming the second conductive layer over the sacrificial layer and the plurality of first support posts; and
28 etching away the sacrificial layer.
25. An interferometric modulator display device manufactured in accordance with the method of Claim 21.
26. The interferometric modulator display pixel of Claim 20, wherein the visual hrightness of the interferometric modulator display pixel increases with greater overlap hetween the first color spectrum and the second color spectrum, and decreases with less overlap between the first color spectrum and the second color spectrum.
27. The interferometric modulator display pixel of Claim 20, further comprising one or more light sources.
28. The interferometric modulator display pixel of Claim 20, wherein the interferometric modulator display pixel comprises a plurality of color space regions, each color space region having a corresponding color spectrum associated therewith; and the interferometric modulator display pixel further comprises a color absorber thereby producing a color located substantially in front of each color space region, each color absorber having an associated color spectrum, wherein the modulator means is operable to shift the color spectrum of each color space region relative to a color spectrum of a corresponding color absorber to control a visual brightness of a color associated with each color space region.
29. The interferometric modulator display pixel of Claim 28, wherein the plurality of color space regions comprises one or more of a red color space region, a green color space region, or a blue color space region.
30. The interferometric modulator display pixel of Claim 27, further comprising one or more light sources that provides illumination at the second pre-determined peak wavelength associated with the light absorbing means.
31. The interferometric modulator display pixel of Claim 20, wherein the modulator means comprises a microelectromechanical system.
29
32. The interferometric modulator display pixel of Claim 20, wherein the modulator means comprises: a first electrode layer; a second electrode layer; a support that separates the first electrode layer from the second electrode layer; and a reflective surface located and movable between a first position and a second position, wherein movement of the reflective surface between the first position and the second position shifts the first color spectrum relative to the second color spectrum.
33. An interferometric modulator display pixel comprising: a microelectromechanical systems (MEMS) interferometric modulator having an associated first color spectrum corresponding to reflectance of light, said first color spectrum having a first peak wavelength; and a color absorber located substantially in front of the interferometric modulator display pixel, the color absorber having an associated second color spectrum corresponding to absorption of light, said second color spectrum comprising a second peak transmission wavelength having reduced absorption that is different from the first peak wavelength, wherein the microelectromechanical systems (MEMS) interferometric modulator means is operable to shift the first color spectrum relative to the second color spectrum to control a visual brightness of the interferometric modulator display pixel.
34. The interferometric modulator display pixel of Claim 33, wherein the visual brightness of the interferometric modulator display pixel increases with greater overlap between the first color spectrum and the second color spectrum, and decreases with less overlap between the first color spectrum and the second color spectrum.
35. The interferometric modulator display pixel of Claim 33 , wherein the interferometric modulator display pixel comprises a plurality of color space regions, each color space region having a corresponding color spectrum associated therewith; and
30 the interferometric modulator display pixel further comprises a color absorber located substantially in front of each color space region, each color absorber haying an associated color spectrum, wherein the microelectromechanical systems (MEMS) interferometric modulator is operable to shift the color spectrum of each color space region relative to a color spectrum of a corresponding color absorber to control a visual brightness of a color associated with each color space region.
36. The interferometric modulator display pixel of Claim 35 , wherein the plurality of color space regions comprises one or more of a red color space region, a green color space region, or a blue color space region.
37. The interferometric modulator display pixel of Claim 33, wherein one or more light sources provides light at the second peak transmission wavelength associated with the color absorber.
38. The interferometric modulator display pixel of Claim 33, wherein the microelectromechanical systems (MEMS) interferometric modulator comprises: a first electrode layer; a second electrode layer, a support structure which separates the first electrode layer from the second electrode layer; and a reflective surface located and movable between a first position and a second position, wherein movement of the reflective surface between the first position and the second position shifts the first color spectrum relative to the second color spectrum.
31
PCT/US2007/008790 2006-04-21 2007-04-11 Method and apparatus for providing brightness control in an interferometric modulator (imod) display WO2007127046A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/408,753 US8004743B2 (en) 2006-04-21 2006-04-21 Method and apparatus for providing brightness control in an interferometric modulator (IMOD) display
US11/408,753 2006-04-21

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WO2007127046A3 WO2007127046A3 (en) 2007-12-27
WO2007127046B1 true WO2007127046B1 (en) 2008-02-28

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TW (1) TW200801762A (en)
WO (1) WO2007127046A2 (en)

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US8004743B2 (en) 2011-08-23
WO2007127046A2 (en) 2007-11-08
US20110043889A1 (en) 2011-02-24
US8077380B2 (en) 2011-12-13
US20120062572A1 (en) 2012-03-15
US20070247704A1 (en) 2007-10-25
WO2007127046A3 (en) 2007-12-27

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