APPLICATION DATA SHEET
`
`Electronic Version v14
`Stylesheet Version v14.0
`
`Title of Invention
`
`DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND
`RELATED DRIVING METHOD
`
`Application Type:
`Attorney Docket Number:
`
`regular, utility
`VASP0001 USA
`
`Correspondence address:
`Customer Number:
`
`027765
`
`11111111
`
`111111111111111
`
`Priority Data:
`
`Doc.No: 092132122; Country -TW; Date: 2003-11-17 us-priority-claimed
`
`Inventors Information:
`
`Inventor 1:
`Applicant Authority Type:
`Citizenship:
`Given Name:
`Family Name:
`Residence:
`City of Residence:
`Country of Residence:
`Address-1 of Mailing Address:
`Address-2 of Mailing Address:
`City of Mailing Address:
`State of Mailing Address:
`Postal Code of Mailing Address:
`Country of Mailing Address:
`Phone:
`Fax:
`E-mail:
`
`Inventor
`TW
`Yung-Hung
`Shen
`
`Hsin-Chu City
`TW
`14F-3, No. 88, Da-Syue Rd.
`
`Hsin-Chu City
`
`TW
`
`Inventor 2:
`Applicant Authority Type:
`Citizenship:
`
`Inventor
`TW
`
`SHARP EXHIBIT 1006
`
`Page 1 of 241
`
`
`
`Electronic Version v14
`Stylesheet Version v14.0
`
`Title of Invention
`
`DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND
`RELATED DRIVING METHOD
`
`Application Type:
`Attorney Docket Number:
`
`regular, utility
`VASP0001 USA
`
`Correspondence address:
`Customer Number:
`
`027765
`
`11111111
`
`111111111111111
`
`Priority Data:
`
`Doc.No: 092132122; Country -TW; Date: 2003-11-17 us-priority-claimed
`
`Inventors Information:
`
`Inventor 1:
`Applicant Authority Type:
`Citizenship:
`Given Name:
`Family Name:
`Residence:
`City of Residence:
`Country of Residence:
`Address-1 of Mailing Address:
`Address-2 of Mailing Address:
`City of Mailing Address:
`State of Mailing Address:
`Postal Code of Mailing Address:
`Country of Mailing Address:
`Phone:
`Fax:
`E-mail:
`
`Inventor
`TW
`Yung-Hung
`Shen
`
`Hsin-Chu City
`TW
`14F-3, No. 88, Da-Syue Rd.
`
`Hsin-Chu City
`
`TW
`
`Inventor 2:
`Applicant Authority Type:
`Citizenship:
`
`Inventor
`TW
`
`SHARP EXHIBIT 1006
`
`Page 1 of 241
`
`
`
`Given Name:
`Family Name:
`Residence:
`City of Residence:
`Country of Residence:
`Address-1 of Mailing Address:
`Address-2 of Mailing Address:
`City of Mailing Address:
`State of Mailing Address:
`Postal Code of Mailing Address:
`Country of Mailing Address:
`Phone:
`Fax:
`E-mail:
`
`Inventor 3:
`Applicant Authority Type:
`Citizenship:
`Given Name:
`Family Name:
`Residence:
`City of Residence:
`Country of Residence:
`Address-1 of Mailing Address:
`Address-2 of Mailing Address:
`City of Mailing Address:
`State of Mailing Address:
`Postal Code of Mailing Address:
`Country of Mailing Address:
`Phone:
`Fax:
`E-mail:
`
`Inventor 4:
`Applicant Authority Type:
`Citizenship:
`Given Name:
`Family Name:
`Residence:
`City of Residence:
`Country of Residence:
`Address-1 of Mailing Address:
`
`Shih-Chung
`Wang
`
`Kao-Hsiung City
`TW
`No. 246-1, Jhong-Jhou 2nd Rd., Chi-Jin District
`
`Kao-Hsiung City
`
`TW
`
`Inventor
`TW
`Yuh-Ren
`Shen
`
`Tai-Nan City
`TW
`No. 33, Lane 185, Yu-Feng St., Community 19,
`Hsin-Dong Li, East District
`Tai-Nan City
`
`TW
`
`Inventor
`TW
`Cheng-Jung
`Chen
`
`Miao- Li Hsien
`TW
`No.2, San-Min St., Community 13, Chung-Hwa Li,
`
`Page 2 of 241
`
`
`
`Address-2 of Mailing Address:
`City of Mailing Address:
`State of Mailing Address:
`Postal Code of Mailing Address:
`Country of Mailing Address:
`Phone:
`Fax:
`E-mail:
`
`Jhu-Nan Town
`Miao- Li Hsien
`
`TW
`
`Attorney Information:
`
`practitioner(s) at Customer Number:
`
`027765
`
`111111111111111
`1111111
`as our attorney(s) or agent(s) to prosecute the application identified above, and to transact all
`business in the United States Patent and Trademark Office connected therewith.
`
`Page 3 of 241
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`TRANSMITTAL
`
`Electronic Version v1.1
`Stylesheet Version v1.1.0
`
`DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND
`RELATED DRIVING METHOD
`
`Title of
`Invention
`
`Application Number:
`
`Date:
`
`First Named Applicant:
`
`Yung-Hung Shen
`
`Confirmation Number:
`
`Attorney Docket Number:
`
`VASP0001 USA
`
`I hereby certify that the use of this system is for OFFICIAL correspondence between patent
`applicants or their representatives and the USPTO. Fraudulent or other use besides the filing
`of official correspondence by authorized parties is strictly prohibited, and subject to a fine
`and/or imprisonment under applicable law.
`I , the undersigned, certify that I have viewed a display of document(s) being electronically
`submitted to the United States Patent and Trademark Office, using either the USPTO provided
`style sheet or software, and that this is the document(s) I intend for initiation or further
`prosecution of a patent application noted in the submission. This document(s) will become
`part of the official electronic record at the USPTO.
`
`Submitted By:
`
`Winston Hsu
`Registered Number: 41,526
`
`Elec. Sign.
`Winston Hsu
`
`Page 4 of 241
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`Documents being submitted:
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`Files
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`us-assignment
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`us-request
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`us-fee-sheet
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`us-declaratio n
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`us-power-of-attorney-grant
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`us-declaratio n
`us-declaratio n
`application-body
`
`VASP0001-usassn.xml
`us-assignment.xsl
`us-assignment.dtd
`VASP0001ASS1.tif
`VASP0001 ASS2.tif
`VASP0001-usrequ.xml
`us-request.dtd
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`VASP0001-usfees.xml
`us-fee-sheet.xsl
`us-fee-sheet.dtd
`VASP0001-usdecl.xml
`us-declaration .dtd
`us-declaration .xsl
`VASP0001-uspoat.xml
`us-power-of-attorney-grant.dtd
`us-power -of -attorney-grant.xsi
`VASP0001 DEC1.tif
`VASP0001 DEC2.tif
`VASP0001-trans.xml
`us-appl ication-body .xsl
`application-body.dtd
`wipo.ent
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`mathmI2-qname-1.mod
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`isomfrk.ent
`isomopf.ent
`isomscr.ent
`isotech.ent
`isobox.ent
`isocyr1 .ent
`isocyr2.ent
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`vasp0001 usa-01.tif
`vasp0001 usa-02.tif
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`Page 5 of 241
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`
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`vasp0001 usa-03.tit
`vasp0001 usa-04.tit
`vasp0001 usa-OS. tit
`vasp0001 usa-06.tit
`vasp0001 usa-07.tit
`vasp0001 usa-OS. tit
`vasp0001 usa-09.tit
`vasp0001 usa-1 O.tit
`
`Comments
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`Page 6 of 241
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`
`
`FEE TRANSMITTAL
`
`Electronic Version v08
`Stylesheet Version v08.0
`
`Title of
`DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND RELATED
`Invention DRIVING METHOD
`
`Application Number:
`
`Date:
`
`First Named Applicant:
`
`Yung-Hung Shen
`
`Attorney Docket Number:
`VASP0001 USA
`TOT AL FEE AUTHORIZED $ 425
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`Patent fees are subject to annual revisions on or about October 1 st of each year.
`
`Filing as small entity
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`BASIC FILING FEE
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`Fee Code
`2001
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`EXTRA CLAIM FEES
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`Amount $
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`I
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`3851
`Subtotal For Basic Filing Fees: $ 385
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`Fee Paid $
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`Fee Description
`Total Claims: 9
`Independent Claims: 2
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`Extra Claim
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`Fee Code
`2202
`2201
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`ASSIGNMENT FEES
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`Recording Each Patent
`Assignment Per Property Fee
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`NORTH AMERICA INTERNATIONAL PATENT
`OFFICE
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`Page 7 of 241
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`Signature:
`Date (YYYYMMDD):
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`VAEB-JMXX-8I1L
`2004-01-07
`
`Charge Assignment Fees Required Under 37 C.F.R. Section 1.21 (h).
`
`Charge Any Additional Fee Required Under 37 C.F.R. Sections 1.16 and 1.17.
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`DECLARATION (37 CFR 1.63) FOR UTILITY OR DESIGN APPLICATION USING AN
`APPLICATION DATA SHEET (37 CFR 1.76)
`
`Electronic Version v11
`Stylesheet Version v1 0
`
`Title of
`Invention DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND
`RELATED DRIVING METHOD
`
`As the below named inventors, we declare that:
`
`This declaration is directed to the invention titled: " DRIVING CIRCUIT OF A LIQUID
`CRYSTAL DISPLAY PANEL AND RELATED DRIVING METHOD"
`
`We believe that we are the original and first inventors of the subject matter which is claimed
`and for which a patent is sought;
`
`We have reviewed and understand the contents of the above-identified application, including
`the claims, as amended by any amendment specifically referred to above;
`
`We acknowledge the duty to disclose to the United States Patent and Trademark Office all
`information known to us to be material to patentability as defined in 37 CFR 1.56, including for
`continuation-in-part applications, material information which became available between the
`filing date of the prior application and the national or PCT International filing date of the
`continuation-in-part application.
`
`All statements made herein of own knowledge are true, all statements made herein on
`information and belief are believed to be true, and further that these statements were made
`with the knowledge that willful false statements and the like are punishable by fine or
`imprisonment, or both, under 18 U.S.C. 1001, and may jeopardize the validity of the
`application or any patent issuing thereon.
`
`FULL NAME OF INVENTORS:
`
`Inventor 1: Yung-Hung Shen
`
`Signature:
`
`Inventor 2: Shih-Chung Wang
`
`Signature:
`
`Inventor 3: Yuh-Ren Shen
`
`Inventor
`
`Citizen of : TW
`
`Inventor
`
`Citizen of : TW
`
`Inventor
`
`Page 9 of 241
`
`
`
`Signature:
`
`Inventor 4: Cheng-Jung Chen
`
`Signature:
`
`Citizen of : TW
`
`Inventor
`
`Citizen of : TW
`
`Page 10 of 241
`
`
`
`PATENT
`Docket No V ASPOOOI USA
`
`COMBINED DECLARATION AND POWER OF ATTORNEY
`
`As a below named inventor, I hereby declare that:
`
`I believe I am the sole (if only one name appears below), or joint (if more than one name
`appears) , original and fIrst inventor of the subject matter whtch is claimed and for which a
`patent is sought on the invention entitled:
`
`"DRIVING CIRCUIT OF A LIQUID CRYSTAL DISPLAY PANEL AND
`RELATED DRIVING METHOD"
`
`+
`
`The specification for the above entitled invention is filed herev,ith.
`
`The specification for the above entitled invention ,vas filed previously
`
`with application serial number: ________ Filing Date: ________ _
`
`I hereby state that I have reviewed and understand the contents 0; the above identified
`specification, including the claims, as amended by any amendment referred to above.
`
`I acknowledge the duty to disclose information which is material to the patentability of
`the invention disclosed in this application in accordance with Title 37, Code of Federal
`Regulations, Section 1.56 (a). I further acknowledge the duty in any continuation-in-part
`application to disclose to the Patent and Trademark Office all information known to be material
`to the patentability of the invention disclosed in this application, as defmed in 1.56, which
`became available to me between the filing date of the prior application and the filing date of this
`application
`
`PRIORITY CLAIM
`
`K,(i,(: Or.:?("3-~/22-
`K,Q {;:: U/ { 'I ,I ..)~(.h)5>
`
`POWER OF ATTORNEY
`
`As a named inventor, I hereby appoint the following attorneies Ie prosecute this
`application and to transact all related business in the Patent and Trademark Office:
`Winston HSH
`Registration# 41,526 WinstonHsu@naipo.com.tw
`
`P.o. Box 506,
`Merrifield, Virginia 22116,
`U.S.A
`TEL: (02)8923-7350
`
`NPO#VAS-POOO I·USA:O
`CUST#
`
`Combined Declaration and Power of Attorney. Page
`
`I oj 2
`
`FIfNPO-POOO IE·US
`DSBO-092UOO 1100
`
`Page 11 of 241
`
`
`
`DECLARATION
`
`I hereby declare that all statements made herein of my own knowledge are true and that
`all statements made on information and belief are believed to be tr ue; and further that these
`statements were made with the knowledge that willful false statements and the like so made are
`punishable by fIne or imprisonment or both under Section 1001 of Title 18 of the United States
`Code and that such wIllful r"he statements may Jeopardize the validity of the application or any
`patent issued hereon.
`
`Date:
`
`Date:
`
`Date:
`
`Date:
`
`;,J
`
`;/"1-( "/,', "-:y...--
`
`Printed Name:
`Post Office Address:
`and Residence
`Citizen of:
`
`{
`
`Yung-Hung Shen
`14F-3, No. 88, Da-Syue Rd., Hsin-Chu City, Taiwan,
`RO.C.
`Ro.C.
`
`Printed Name:
`Post Office Address:
`and Residence
`Citizen of:
`
`C
`
`Shih-Chung Wang
`No. 246-1, Jhong-Jhoo2nd Rd., Chi-Jin District,
`Kao-Ilsiung City, Taiwan, KO.C.
`
`Printed Name:
`Post Offiee Address:
`and Residence
`Citizen of:
`
`/ !'.
`Yuhren Shen
`No. 33, Lane 185, Yu-Fong St., East District, Tai-Nan
`City, Taiwan, RO.C.
`RO.C.
`
`/ \ 'i
`
`{_~~ f\ _~' v~
`
`Printed Name:
`Post Office Address:
`and Residence
`Citizen of:
`
`Cheng-Jun'Chen
`No.2, San-Min St, Communl1.y'E{Chung-Hwa Li,
`Jhu-Nan Town, Miao- Li Hsien, Taiwan, RO.C.
`RO.C.
`
`NPOJiVAS-POOOI-USA:O
`CUST!!
`
`Combined Declaration and Power of Attome)', Page 2 of 2
`
`F#NPO-POOOIE-US
`DSBO-092UOO II 00
`
`Page 12 of 241
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`
`
`POWER OF ATTORNEY OR AUTHORIZATION OF AGENT
`
`Electronic Version v05
`Stylesheet Version v05.0
`
`Title of Invention
`
`DRIVING CIRCUIT OF A LIQUID CRYSTAL
`DISPLAY PANEL AND RELATED DRIVING METHOD
`
`First Named Applicant:
`Attorney Docket Number:
`
`Yung-Hung Shen
`VASP0001 USA
`
`I hereby appoint the registered practitioner(s) at Customer Number:
`
`027765
`
`as attorney(s) or agent(s) to prosecute the application identified above, and to transact all
`business in the United States Patent and Trademark Office connected therewith.
`
`I am the Applicant/Inventor.
`
`Full Name of Applicant of Record:
`Winston Hsu
`
`Signature: Winston Hsu
`
`I Date: 2004-01-07
`
`Page 13 of 241
`
`
`
`Electronic Version
`
`Stylesheet Version vI.I.1
`
`Description
`
`DRIVING CIRCUIT OF A LIQUID CRYSTAL
`DISPLAY PANEL AND RELATED DRIVING
`METHOD
`
`BACKGROUND OF INVENTION
`
`[0001] 1. Field of the Invention
`
`[0002] The invention relates to a driving circuit of a liquid crystal
`
`display (LCD) panel and its related driving method, and
`
`more particularly, to a driving circuit for applying over two
`
`data impulses to a pixel electrode within one frame pe(cid:173)
`
`riod, and its related driving method.
`
`[0003] 2. Description of the Prior Art
`
`[0004] A liquid crystal display (LCD) has advantages of
`
`lightweight, low power consumption, and low divergence
`
`and is applied to various portable equipment such as
`
`notebook computers and personal digital assistants
`
`(PDAs). In addition, LCD monitors and LCD televisions are
`
`gaining in popularity as a substitute for traditional cath-
`
`Page 14 of 241
`
`
`
`ode ray tube (CRT) monitors and televisions. However, an
`
`LCD does have some disadvantages. Because of the limi(cid:173)
`
`tations of physical characteristics, the liquid crystal
`
`molecules need to be twisted and rearranged when
`
`changing input data, which can cause the images to be
`
`delayed. For satisfying the rapid switching requirements
`
`of multimedia equipment, improving the response speed
`
`of liquid crystal is desired.
`
`[0005] Generally when driving an LCD, a driving circuit receives a
`
`plurality of frame data and then generates corresponding
`
`data impulses, scan voltages, and timing signals, accord(cid:173)
`
`ing to the frame data, in order to control pixel operation
`
`of the LCD. Each of the frame data i ncl udes data for re(cid:173)
`
`freshing all of the pixels within a frame period; thus each
`
`of the frame data can be regarded as i ncl ud i ng a pi ural ity
`
`of pixel data, and each of the pixel data is for defining the
`
`gray level that a pixel is required to reach within a frame
`
`period. In the general standard, each pixel can switch
`among 256 (2 8
`8 bits in length.
`
`) gray levels, thus each of the pixel data is
`
`[0006] Please refer to Fig.l showing a timing diagram of pixel
`
`data values varying in accordance with the frames. When
`
`driving a pixel, the driving circuit receives a plurality of
`
`Page 15 of 241
`
`
`
`pixel data used for driving the pixel in sequence. As
`
`shown in Fig.I, GN, GN+ 1, GN+2 are the pixel data re(cid:173)
`
`ceived in frame periods N, N+ 1, N+2, and the driving cir(cid:173)
`
`cuit determines the gray level of the pixel in the frame pe(cid:173)
`
`riods N, N+ 1, N+2 according to the values of the pixel
`
`data GN, GN+ 1, GN+2. In general, the larger the value of
`
`the pixel data is, the larger the gray level is. The driving
`
`circuit generates a data impulse corresponding to a frame
`
`period according to the pixel data GN, GN+ 1, GN+2, and
`
`applies the pulse to a pixel electrode of the corresponding
`
`pixel to have the pixel be in the appropriate gray level as
`
`required within each frame period.
`
`[0007] Please refer to Fig.2 showing a timing diagram of different
`
`transmission rates of a pixel, varying in accordance with
`
`the frames. Two curves CI, C2 are measured when the
`
`driving circuit changes the transmission rate from TI to
`
`T2 beginning at frame period N. The curve CI shows the
`
`transmission rate of a pixel not overdriven corresponding
`
`to the frames, and the curve C2 shows the transmission
`
`rate of the pixel overdriven corresponding to the frames.
`
`The U.S. published application No. 2002/0050965 is one
`
`of the references of the conventional overdriving method.
`
`There is a time delay when charging liquid crystal
`
`Page 16 of 241
`
`
`
`molecules, so that they cannot twist at a predetermined
`
`angle at a predetermined transmission rate. As shown by
`
`the curve C1, in the case of not being overdriven, the
`
`transmission rate cannot reach a predetermined level in
`
`the frame period N but has to wait until the frame period
`
`N+2. Such a delay causes blurring. In order to improve
`
`that, some conventional LCD are overdriven, which means
`
`applying a higher or a lower data impulse to the pixel
`
`electrode to accelerate the reaction speed of the liquid
`
`crystal molecules, so that the pixel can reach the prede(cid:173)
`
`termined gray level in a predetermined frame period. As
`
`shown by the curve C2, in the case of being overdriven,
`
`although the reaction speed of the liquid crystal molecules
`
`is faster than in case of not being overdriven, the trans(cid:173)
`
`mission rate has to wait until frame period N+ 1 to reach
`
`T2. Thus, the requirement of reaching T2 in the frame pe(cid:173)
`
`riod N still remains unsatisfied.
`
`SUMMARY OF INVENTION
`
`[0008]
`
`It is therefore a primary objective of the claimed invention
`
`to provide a driving circuit of an LCD panel and its relating
`
`driving method to solve the problem mentioned above.
`
`[0009] Briefly, the present invention provides a method for driv(cid:173)
`
`ing an LCD panel. The LCD panel includes a plurality of
`
`Page 17 of 241
`
`
`
`scan lines, a plurality of data lines, and a plurality of pix(cid:173)
`
`els. Each pixel is connected to a corresponding scan line
`
`and a corresponding data line, and each pixel includes a
`
`liquid crystal device and a switching device connected to
`
`the corresponding scan line, the corresponding data line,
`
`and the liquid crystal device. The method includes receiv(cid:173)
`
`ing continuously a plurality of frame data, generating a
`
`plurality of data impulses for each pixel in every frame
`
`period according to the frame data and applying the data
`
`impulses to the liquid crystal device of one of the pixels
`
`within one frame period via the data line connected to the
`
`pixel in order to control the transmission rate of the liquid
`
`crystal device of the pixel.
`
`[0010] The present invention further provides a driving circuit for
`
`driving an LCD panel including a blur clear converter for
`
`receiving frame data every frame period, each frame data
`
`comprising a plurality of pixel data and each pixel data
`
`corresponding to a pixel, the blur clear converter delaying
`
`current frame data to generate delayed frame data and
`
`generating a plurality of overdriven pixel data in every
`
`frame period for each pixel; a source driver for generating
`
`a plurality of data impulses to each pixel according to the
`
`plurality of overdriven pixel data generated by the blur
`
`Page 18 of 241
`
`
`
`clear converter and applying the data impulses to the liq(cid:173)
`
`uid crystal device of the pixel via the scan line connected
`
`to the pixel in order to control the transmission rate of
`
`the liquid crystal device; and a gate driver for applying a
`
`scan line voltage to the switch device of the pixel so that
`
`the data impulses can be applied to the liquid crystal de(cid:173)
`
`vice of the pixel.
`
`[0011] These and other objectives of the present invention will no
`
`doubt become obvious to those of ordinary skill in the art
`
`after reading the following detailed description of the pre(cid:173)
`
`ferred embodiment that is illustrated in the various fig(cid:173)
`
`ures and drawings.
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`[0012] Fig.l is a timing diagram of the pixel data values varying
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`in accordance with the frames accord i ng to the prior art.
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`[0013] Fig.2 is a timing diagram of different transmission rates of
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`the pixel varying in accordance with the frames.
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`[0014] Fig.3 is a block diagram of a driving circuit and an LCD
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`panel according to the present invention.
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`[0015] Fig.4 is a circuit diagram of the LCD panel.
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`[0016] Fig.S is a timing diagram of pixel data values varying in
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`accordance with frames.
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`Page 19 of 241
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`[0017] Fig.6 is a timing diagram of the transmission rate of the
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`pixel varying in accordance with the frames.
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`[0018] Fig.? is a block diagram of the blur clear converter ac(cid:173)
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`cording to the first embodiment of the present invention.
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`[0019] Fig.8 is a block diagram of the blur clear converter ac(cid:173)
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`cording to the second embodiment of the present inven(cid:173)
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`tion.
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`[0020] Fig.9 is a timing diagram of original pixel data received by
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`the blur clear converter varying in accordance with the
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`frames.
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`[0021] Fig.l0 is a timing diagram of overdriven pixel data gener(cid:173)
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`ated by the blur clear converter varying in accordance with
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`the frames.
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`DETAILED DESCRIPTION
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`[0022] Please refer to Fig.3 showing a block diagram of a driving
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`circuit 10 and an LCD panel 30 according to the present
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`invention. The driving circuit 10 is for driving the LCD
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`panel 30, which includes a signal controller 12, a blur
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`clear converter 14, a timing controller 16, a source driver
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`18, and a gate driver 20. The signal controller 12 is for
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`receiving composite video signals Sc, which includes
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`frame data and timing data for driving the LCD panel 30,
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`and processing the composite video signals Sc to separate
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`Page 20 of 241
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`them into frame signals G and control signals C. Subse(cid:173)
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`quently, the blur clear converter 14 continuously receives
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`the control signals C and the frame data included in the
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`frame signals G and generates processed frame signals G
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`including a plurality of overdriven data according to the
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`frame data. The timing controller 16 controls the source
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`driver 18 and the gate driver 20 according to the frame
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`signals G and the control signals C so that the source
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`driver 18 and the gate driver 20 generate corresponding
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`data line voltages and scan line voltages accord i ng to the
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`plurality of overdriven data included in the frame signals
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`G in order to drive the LCD panel 30 to generate images
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`corresponding to the composite video signals Sc.
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`[0023] Please refer to Fig.4 showing a circuit diagram of the LCD
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`panel 30. The LCD panel 30 includes a plurality of scan
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`lines 32, a plurality of data lines 34, and a plurality of pix(cid:173)
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`els 36. Each pixel 36 is connected to a corresponding scan
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`line 32 and a corresponding data line 34, and each pixel
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`36 has a switching device 38 and a liquid crystal device 39
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`a.k.a. a pixel electrode. The switching device 38 is con(cid:173)
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`nected to the corresponding scan line 32 and the corre(cid:173)
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`sponding data line 34, and the source driver 18 and the
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`gate driver 20 control the operation of each pixel 36 via
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`Page 21 of 241
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`the scan line 32 and the data line 34. To drive the LCD 30,
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`scan voltages are applied to the scan lines 32 to turn on
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`the switching devices 38, and data voltages are applied to
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`the data lines 34 and transmitted to the pixel electrodes
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`30 through the switching devices 38. Therefore, when the
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`scan voltages are applied to the scan lines 32 to turn on
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`the switching devices 38, the data voltages on the data
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`lines 34 will charge the pixel electrodes 39 through the
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`switch devices 38, thereby twisting the liquid crystal
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`molecules. When the scan voltages on the scan lines 32
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`are removed to turn off the switching devices 38, the data
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`lines 34 and the pixels 36 will disconnect, and the pixel
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`electrodes 39 will remain charged. The scan lines 32 turn
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`the switching devices 38 on and off repeatedly so that the
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`pixel electrodes 39 can be repeatedly charged. Different
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`data voltages cause different twisting angles and show
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`different transmission rates. Hence, the LCD 30 displays
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`various images.
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`[0024] Please refer to Fig.S showing a timing diagram of pixel
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`data values varying in accordance with frames. According
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`to the present invention, when driving any pixel 36 of the
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`LCD panel 30, the driving circuit 10 generates a plurality
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`of pixel data used for driving the pixel in sequence. As
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`Page 22 of 241
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`shown in Fig.S, GN, GN(2), GN+1, GN+1(2), GN+2,
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`GN+2(2), GN+3, GN+3(2) are the pixel data generated in
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`frame periods N, N+ 1, N+2, N+3. The driving circuit 10
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`generates two pieces of pixel data for each pixel 36 in ev(cid:173)
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`ery frame period. The driving circuit 10 drives the pixel to
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`reach gray levels in the frame periods N, N+ 1, N+2, N+3
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`according to the values of the pixel data GN - GN+2(2).
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`For instance, when the pixel data GN, GN(2) are gener(cid:173)
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`ated, the source driver of the driving circuit 10 converts
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`the pixel data GN, GN(2) into two corresponding data im(cid:173)
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`pulses and then applies them to the liquid crystal device
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`39 via the data line 32 in the frame period N in order to
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`control the transmission rate of the liquid crystal device
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`39. Similarly, data impulses corresponding to the pixel
`
`data GN+ 1 - GN+3(2) are applied respectively to corre(cid:173)
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`sponding pixel electrodes 39 every half a frame period.
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`Same as the prior art, the larger the value of the pixel data
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`is, the higher the voltage of the corresponding data im(cid:173)
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`pulse is, and the larger the gray level value is.
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`[0025] Please refer to Fig.6 showing a timing diagram of the
`
`transmission rate of the pixel 36 varying in accordance
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`with the frames. As described above, the driving circuit 10
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`generates two pieces of pixel data in each frame period,
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`Page 23 of 241
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`and then the source driver 18 generates two correspond(cid:173)
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`ing data impulses according to the two pieces of pixel
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`data and applies them to the pixel electrode 39 of the
`
`corresponding pixel 36 in order to control the transmis(cid:173)
`
`sion rate and gray level of the pixel electrode 39. As
`
`shown in Fig.6, the driving circuit 10 changes the trans(cid:173)
`
`mission rate of the pixel electrode 39 of a pixel 36 from
`
`Tl to T2 in the frame period N+ 1. The pixel electrode 39
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`is applied with two data impulses corresponding to the
`
`pixel data GN+ 1, GN+ 1(2) in the frame period N+ 1 at a
`
`time interval of half a frame period. As shown in Fig.6, al(cid:173)
`
`though the transmission rate of the pixel electrode 39
`
`cannot reach T2 in the first half period n+2 of the frame
`
`period N+ 1, in the later half period n+3 of the frame pe(cid:173)
`
`riod N+ 1, the pixel electrode 39 is applied with another
`
`data impulse, so that the transmission rate can reach T2
`
`in the frame period N+ 1 as required. Therefore, blurring
`
`will not occur.
`
`[0026]
`
`In the present embodiment, the two pieces of pixel data
`
`of each pixel in every frame period are generated by the
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`blur clear converter 14. Please refer to Fig.7 showing a
`
`block diagram of the blur clear converter 14. The blur
`
`clear converter 14 includes a multiplier 40, a processing
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`Page 24 of 241
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`circuit 42, a first image memory 44, a second image
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`memory 46, a first memory controller 48, and a second
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`memory controller 50. The multiplier 40 is for doubling
`
`the frequency of the control signal C to generate a multi(cid:173)
`
`plied signal C2. The first image memory 44 is controlled
`
`by the first memory controller 48 to delay current pixel
`
`data Gm for a frame period to generate delayed pixel data
`
`Gm-l according to the control signal C. The processing
`
`circuit 42 generates a plurality of overdriven pixel data GN
`
`according to the current pixel data Gm and the delayed
`
`pixel data Gm-l. The second image memory 46 stores the
`
`overdriven pixel data GN, and the second memory con(cid:173)
`
`troller 50 controls the second image memory 46 to output
`
`two overdriven pixel data GN, GN(2) to each pixel 36
`
`within a frame period according to the multiplied signal
`
`C2 in order to have the source driver 18 apply two data
`
`impulses to a specific pixel 36 within a frame period ac(cid:173)
`
`cording to the two overdriven pixel data GN, GN(2).
`
`[0027] Please refer to Fig.8 showing a block diagram of the blur
`
`clear converter 60 according to the second embodiment
`
`of the present invention. The blur clear converter 60 func(cid:173)
`
`tions the same as the blur clear converter 14, which in(cid:173)
`
`cludes a multiplier 62, a first image memory 66, a second
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`Page 25 of 241
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`image memory 68, a third image memory 70, a memory
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`controller 64, a processing circuit 74, and a comparing
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`circuit 72. The multiplier 62 is for doubling the frequency
`
`of the control signal C to generate a multiplied signal C2.
`
`The first image memory 66 is for receiving and temporar(cid:173)
`
`ily storing a plurality of pixel data G. The second image
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`memory 68 delays the plurality of pixel data G for a frame
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`period to generate delayed pixel data Gm-l. The third
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`image memory 70 delays the pixel data Gm-l for a frame
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`period to generate delayed pixel data Gm-2. Thus the
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`pixel data Gm-2 lags the pixel data Gm-l for a frame pe(cid:173)
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`riod, and so does the pixel data Gm-l with respect to the
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`pixel data Gm. The memory controller 64 controls the
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`second image memory 68 and the third image memory 70
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`to output two overdriven pixel data in each frame period
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`according to the multiplied signal C2. The processing cir(cid:173)
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`cuit 74 generates two pieces of overdriven pixel data GN-
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`1, GN-l(2) for each pixel 36 in every frame period ac(cid:173)
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`cording to the pixel data Gm-l, Gm-2. The comparing
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`circuit 72 compares the pixel data Gm-l with the pixel
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`data Gm-2 to determine the values of the overdriven pixel
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`data GN-l, GN-l(2).
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`[0028] Please refer to Fig.9 showing a timing diagram of original
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`Page 26 of 241
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`
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`pixel data received by the blur clear converter 60 varying
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`in accordance with the frames, and Fig.10 showing a tim(cid:173)
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`ing diagram of overdriven pixel data generated by the blur
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`clear converter 60 varying in accordance with the frames.
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`As shown in Fig.9, the original pixel data received by the
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`blur clear converter 60 in the frame periods Nand N+ 1
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`are respectively Gm and Gm+ 1, with a difference Diff be(cid:173)
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`tween each other. The blur clear converter 60 generates
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`the two overdriven pixel data GN+ 1, GN+ 1(2) with a dif(cid:173)
`
`ference ~G between each other according to the original
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`pixel data Gm, Gm+ 1. The difference ~G is determined by
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`the comparing circuit 72 in Fig.B for driving the pixels 36
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`according to difference conditions. The difference ~G is
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`determined according to the difference Diff between the
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`original pixel data Gm and Gm+ 1. For instance, when the
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`difference Diff is less than a specific value, the comparing
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`circuit 72 determines the difference ~G as 0, that is
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`equating the overdriven pixel data GN+ 1 to the overdriven
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`pixel data GN+ 1(2). Or when the difference Diff is larger
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`than a specific value, the comparing circuit 72 modulates
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`the difference ~G to drive the LCD panel 30 properly.
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`[0029]
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`In contrast to the prior art, the present invention discloses
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`a driving circuit and relating driving method to generate
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`Page 27 of 241
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`two pieces of pixel data in each frame period for every
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`pixel on an LCD panel and then to generate two data im(cid:173)
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`pulses according to the two pieces of pixel data and to
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`apply them to each pixel within a frame period in order to
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`change the transmission rate of a pixel electrode. Thus,
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`each of the pixels of the LCD panel is applied of a plurality
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`of data impulses within a frame period, so that liquid
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`crystal molecules of the pixels can twist to reach a prede(cid:173)
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`termined gray level within a frame period, and blurring
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`will not occur.
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`[0030] Those skilled in the art will readily observe that numerous
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`modifications and alterations of the device and method
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`may be made while retaining the teachings of the inven(cid:173)
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`tion. Accordingly, the above disclosure should be con(cid:173)
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`strued as limited only by the metes and bounds of the ap(cid:173)
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`pended claims.
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`Page 28 of 241
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`Electronic Version
`
`Stylesheet Version vI.I.1
`
`Claims
`
`[c1]
`
`I.A method for driving a liquid crystal display (LCD)
`panel, the LCD panel comprising:
`a plurality of scan lines;
`a plurality of data lines; and
`a plurality of pixels, each pixel being connected to a cor(cid:173)
`responding scan line and a corresponding data line, and
`each pixel comprising a liquid crystal device and a
`switching device connected to the corresponding scan
`line, the corresponding data line, and the liquid crystal
`device, and
`the method comprising:
`receiving continuously a plurality of frame data;
`generating a plurality of data impulses for ea
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