Source: http://www.google.com/patents/US7388181?dq=6272333
Timestamp: 2013-12-07 02:41:48
Document Index: 591707936

Matched Legal Cases: ['Application No. 10', 'Application No. 10', 'arts 106', 'art 103', 'arts 106', 'arts 106']

Patent US7388181 - Apparatus for adjusting applied voltage in display system using diffractive ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Advanced Patent Search | Sign inAdvanced Patent SearchPatentsDisclosed herein is an apparatus for adjusting applied voltage in a display system using a diffractive optical modulator. The apparatus for adjusting applied voltage can measure the intensity of diffracted light emitted from the diffractive optical modulator, and adjust voltage to be applied to the diffractive...http://www.google.com/patents/US7388181?utm_source=gb-gplus-sharePatent US7388181 - Apparatus for adjusting applied voltage in display system using diffractive optical modulatorPublication numberUS7388181 B2Publication typeGrantApplication numberUS 11/588,876Publication dateJun 17, 2008Filing dateOct 27, 2006Priority dateOct 28, 2005Fee statusLapsedAlso published asUS20070101384Publication number11588876, 588876, US 7388181 B2, US 7388181B2, US-B2-7388181, US7388181 B2, US7388181B2InventorsKyu Bum Han, In Jae Yeo, Seung Won RyuOriginal AssigneeSamsung Electro-Mechanics Co., Ltd.Patent Citations (4), Referenced by (5), Classifications (14), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetApparatus for adjusting applied voltage in display system using diffractive optical modulatorUS 7388181 B2Abstract Disclosed herein is an apparatus for adjusting applied voltage in a display system using a diffractive optical modulator. The apparatus for adjusting applied voltage can measure the intensity of diffracted light emitted from the diffractive optical modulator, and adjust voltage to be applied to the diffractive optical modulator based on measurement results.
CROSS REFERENCE TO RELATED APPLICATION(S) This application claims the benefit of Korean Patent Application No. 10-2005-0102468, entitled �Reference voltage reconstruction apparatus in display system using diffraction modulation and method thereof�, filed Oct. 28, 2005, and of Korean Patent Application No. 10-2005-0110806, entitled �Electrode voltage construction apparatus in display system using diffraction modulation and method thereof�, filed Nov. 18, 2005, which are hereby incorporated by references in their entirety into this application.
New types of display devices, which can solve the disadvantages of the above-described FPDs, have been developed. Recently, there has been proposed a display device that can display images using micro Spatial Light Modulators (SLMs) that are formed for respective pixels using Micro Electromechanical Systems (hereinafter abbreviated as �MEMSs�), which are based on an ultra-micro machining technology.
n ⁢ ⁢ λ 2 (where λ is the wavelength of incident light and n is an integer), the intensity of light is lowest. Furthermore, when the interval between the upper reflective parts 106 a and 106 b and the lower reflective part 103 formed on the insulating layer is a second interval
λ 4 + n ⁢ ⁢ λ 2 , the intensity of light is highest. Meanwhile, in order to exhibit the highest intensity of light, the first upper reflective parts 106 a, indicated by solid lines, must be displaced by l1 or L1, and the second upper reflective parts 106 b must be displaced by l2 or L2.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an apparatus for adjusting applied voltage in a display system using a diffiactive optical modulator, which can adjust the voltage that will be applied to the diffractive optical modulator, based on the measured intensity of diffracted light emitted from the diffractive optical modulator.
FIG. 5A is a view showing the structure of a frame of video data composed of 480�640 pixels, and FIG. 5B is a view showing the transposition of input video data from laterally arranged data to vertically arranged data;
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail in conjunction with preferred embodiments with reference to the accompanying drawings.
As shown in FIG. 3, the display system using a diffractive optical modulator, which is applied to a portable terminal that is equipped with the apparatus for adjusting applied voltage according to an embodiment of the present invention, includes a wireless communication unit 310 for performing wireless communication, a key input unit 312 for allowing a user to input information, memory 314 for storing video data, etc., a baseband processor 316 for performing control so that video images are displayed on a display unit 320 or the projection control unit 340 of an optical modulator projector 330 (that is, a display system using a single panel-type diffractive optical modulator) projects video images onto a screen 360, an image sensor module processor 318 for processing video input from a provided camera or the like and sending the processed video data to the baseband processor 316, the display unit 120 for receiving video data from the baseband processor 316 and displaying video on a screen based on the received video data, and the single panel-type optical modulator projector 330 for, under the control of the baseband processor 316, generating a video image based on the video data, received from the baseband processor 316, using the single panel diffractive optical modulator, enlarging the generated video image, and projecting the enlarged video image onto the screen 360. In this case, the baseband processor 316 may be referred to as a �terminal control system.�
The video pivot unit 402 of the projection control unit 340 performs a data transposition of converting laterally arranged video data into vertically arranged data, thereby converting laterally input video data into vertically arranged video data and outputting the data. The reason why data transposition is required in the video pivot unit 402 is that scan lines emitted from the diffractive optical modulator 353 are laterally scanned and displayed because scanning diffraction point light beams corresponding to a plurality of pixels (for example, 480 pixels when input video data is 480�640) are vertically arranged.
Accordingly, in order to form one frame of video, composed of 480�640 pixels, using the diffractive optical modulator 353 by scanning scan lines, 480 pieces of vertically arranged data are required.
FIG. 5A illustrates the structure of a frame of video data that is composed of 480�640 pixels. The video data shown in FIG. 5A is input from the outside in a lateral direction in the sequence of (0,0), (0,1), (0,2), (0,3), . . . .
In this case, the term �upper or second electrode (gamma) reference voltage� stored in the gamma reference voltage storage unit 404 refers to an upper or second electrode reference voltage that is considered when the optical modulator drive circuit 422 of the diffractive optical modulator 353 outputs an applied voltage based on the gray level of video data for respective elements.
The term �lower or first electrode (gamma) reference voltage� stored in the gamma reference voltage storage unit 404 refers to a lower or first electrode reference voltage that is applied to the lower electrode layer of the diffractive optical modulator 353.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6504651May 12, 2000Jan 7, 2003Nec CorporationLight modulator, light source using the light modulator, display apparatus using the light modulator, and method for driving the light modulatorUS6583915Oct 10, 2000Jun 24, 2003Lg. Philips Lcd Co., Ltd.Display device using a micro light modulator and fabricating method thereofUS7170668 *Sep 28, 2004Jan 30, 2007Samsung Electro-Mechanics Co., Ltd.Hybrid light modulatorUS20060279198 *Jun 7, 2006Dec 14, 2006Yun Sang KApparatus and method for calibrating a reflecting mirror* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7515328 *Aug 30, 2007Apr 7, 2009Samsung Electro-Mechanics Co., Ltd.Apparatus for resetting location of reflective part of diffractive optical modulatorUS7532319 *Mar 6, 2008May 12, 2009Samsung Electro-Mechanics Co., Ltd.Apparatus for calibrating displacement of reflective parts in diffractive optical modulatorUS8040589 *Feb 11, 2009Oct 18, 2011Qualcomm Mems Technologies, Inc.Devices and methods for enhancing brightness of displays using angle conversion layersUS8237643 *Nov 12, 2008Aug 7, 2012Himax Technologies LimitedTransreflective display apparatus and driving method thereofUS20100117940 *Nov 12, 2008May 13, 2010Himax Technologies LimitedTransreflective display apparatus and driving method thereof* Cited by examinerClassifications U.S. Classification250/205, 250/216, 359/260, 359/245, 250/237.00G, 359/558, 250/235International ClassificationG01J1/32Cooperative ClassificationG02F2203/22, G02F2203/12, G03B21/00, G02B26/0808European ClassificationG02B26/08D, G03B21/00Legal EventsDateCodeEventDescriptionAug 7, 2012FPExpired due to failure to pay maintenance feeEffective date: 20120617Jun 17, 2012LAPSLapse for failure to pay maintenance feesJan 30, 2012REMIMaintenance fee reminder mailedApr 20, 2007ASAssignmentOwner name: SAMSUNG ELECTRO-MECHANICS CO., LTD., KOREA, REPUBLFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAN, KYU BUM;YEO, IN JAE;RYU, SEUNG WON;REEL/FRAME:019189/0033Effective date: 20061025RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google